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A Hypoxia-Inducible Factor Stabilizer Improves Hematopoiesis and Iron Metabolism Early after Administration to Treat Anemia in Hemodialysis Patients. Int J Mol Sci 2020; 21:ijms21197153. [PMID: 32998272 PMCID: PMC7583824 DOI: 10.3390/ijms21197153] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2020] [Revised: 09/25/2020] [Accepted: 09/26/2020] [Indexed: 12/20/2022] Open
Abstract
Roxadustat (Rox), a hypoxia-inducible factor (HIF) stabilizer, is now available for the treatment of anemia in hemodialysis (HD) patients. To investigate hematopoietic effect and iron metabolism, this study involved 30 HD patients who were initially treated with darbepoetin (DA), a conventional erythropoietin-stimulating agent, and then switched to Rox. We measured erythrocyte, reticulocyte indices, and iron-related factors at every HD during the first two weeks after the treatment switch (Days 0–14) and again on Days 21 and 28. We measured erythropoietin (EPO) concentration every week and examined their changes from Day-0 values. The same variables were measured in 15 HD patients who continued DA at every HD for one week. Iron-related factors were also measured on Days 14 and 28. In the Rox group, hepcidin significantly decreased from Day 2. The reticulocyte hemoglobin content (CHr) significantly increased on Day 4, but decreased with a significant increase in reticulocyte count from Day 7. Log10(serum ferritin) significantly decreased after Day 11. Log10(EPO concentration) was lower at all time points. Compared with the DA group, the Rox group showed significant differences in all variables except CHr. These results suggest that Rox improves hematopoiesis and iron metabolism early after administration independent of EPO concentration.
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Affiliation(s)
- Tadao Akizawa
- Department of Nephrology, Showa University School of Medicine, Tokyo, Japan
| | - Manabu Iwasaki
- Department of Data Science, Yokohama City University, Yokohama, Japan
| | - Yusuke Yamaguchi
- Japan-Asia Data Science, Development, Astellas Pharma, Inc., Tokyo, Japan
| | - Yoshikatsu Majikawa
- Japan-Asia Clinical Development 2, Development, Astellas Pharma, Inc., Tokyo, Japan
| | - Michael Reusch
- Development Medical Science Urology and Nephrology, Astellas Pharma Europe B.V., Leiden, The Netherlands
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103
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Wen T, Zhang X, Wang Z, Zhou R. Hypoxia-Inducible Factor Prolyl Hydroxylase Inhibitors in Patients with Renal Anemia: A Meta-Analysis of Randomized Trials. Nephron Clin Pract 2020; 144:572-582. [PMID: 32866960 DOI: 10.1159/000508812] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Accepted: 05/17/2020] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Hypoxia-inducible factor prolyl hydroxylase inhibitors (HIF-PHIs) are a new class of treatment for renal anemia in patients with chronic kidney disease (CKD). This meta-analysis was designed to evaluate their efficacy and safety. METHOD Eight databases were searched for randomized controlled trials (RCTs). Information about efficacy and safety was extracted and combined using random-effects or fixed-effects models, depending on heterogeneity. Risk of bias was assessed using the method recommended by the Cochrane Centre. RESULTS Nineteen articles on RCTs were selected, involving 3,289 participants. We found that HIF-PHIs improved the level of hemoglobin (Hb) (weighted mean difference [WMD] 1.40; 95% CI: 0.96-1.84; p < 0.001), response rate of Hb (risk ratio [RR] 5.95; 95% CI: 3.95-8.96; p < 0.001), and total iron-binding capacity (WMD 42.94; 95% CI: 31.39-54.49; p < 0.001), while reducing the level of hepcidin (WMD -40.42; 95% CI: -50.44 to -30.39; p < 0.001), ferritin (WMD -64.60; 95% CI: -78.56 to -50.64; p < 0.001), and transferrin saturation (WMD -5.57; 95% CI: -8.53 to -2.61; p < 0.001). Meanwhile, there was no evidence of effect on serum iron (WMD 1.60; 95% CI: -3.72 to 6.93; p = 0.55), nor on the incidence of adverse events (AEs) (RR 1.06; 95% CI: 0.99-1.15; p = 0.51) or of serious adverse events (SAEs) (RR 1.14; 95% CI: 0.88-1.46; p = 0.32). CONCLUSION HIF-PHIs ameliorate renal anemia and rectify iron metabolism in the short term without increasing the incidence of AEs and SAEs.
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Affiliation(s)
- Tong Wen
- Department of Nephrology, Shenzhen People's Hospital, The Second Affiliated Hospital, Jinan University, Shenzhen, China
| | - Xinzhou Zhang
- Department of Nephrology, Shenzhen People's Hospital, The Second Affiliated Hospital, Jinan University, Shenzhen, China,
| | - Zhen Wang
- Department of Nephrology, Shenzhen People's Hospital, The Second Affiliated Hospital, Jinan University, Shenzhen, China
| | - Ru Zhou
- Department of Nephrology, Shenzhen People's Hospital, The Second Affiliated Hospital, Jinan University, Shenzhen, China
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Yan Z, Xu G. A Novel Choice to Correct Inflammation-Induced Anemia in CKD: Oral Hypoxia-Inducible Factor Prolyl Hydroxylase Inhibitor Roxadustat. Front Med (Lausanne) 2020; 7:393. [PMID: 32850902 PMCID: PMC7423837 DOI: 10.3389/fmed.2020.00393] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Accepted: 06/23/2020] [Indexed: 12/13/2022] Open
Abstract
Anemia is a complication of chronic kidney disease (CKD), primarily due to insufficient secretion of erythropoietin (EPO) by the kidney. Erythropoiesis-stimulating agents (ESAs) are used to treat anemia associated with chronic kidney disease. A poor response to ESAs has been associated with inflammation. Inflammation can affect erythrocytes and its production in many ways, but mainly through the inflammatory cytokine IL-6 to stimulate the synthesis of hepcidin in the liver. Hepcidin causes iron insufficiency, which causes erythrocytes to fail to mature normally. In addition, inhibition of bone marrow erythroid precursor cells by inflammatory cytokines such as IL-1 and TNF-α also affects bone marrow hematopoiesis. These cytokines are also important factors leading to EPO resistance. Roxadustat is a new drug for the treatment of renal anemia. In addition to promoting the production of EPO, clinical trials have shown that it can significantly reduce hepcidin and can potentially be used for the treatment of inflammation-induced anemia in CKD.
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Affiliation(s)
- Zhipeng Yan
- Department of Nephrology, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Gaosi Xu
- Department of Nephrology, The Second Affiliated Hospital of Nanchang University, Nanchang, China
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Abstract
Hypoxia-inducible factors (HIFs) control transcriptional responses to reduced O2 availability. HIFs are heterodimeric proteins composed of an O2-regulated HIF-α subunit and a constitutively expressed HIF-1β subunit. HIF-α subunits are subject to prolyl hydroxylation, which targets the proteins for degradation under normoxic conditions. Small molecule prolyl hydroxylase inhibitors, which stabilize the HIF-α subunits and increase HIF-dependent expression of erythropoietin, are in phase III clinical trials for the treatment of anemia in patients with chronic kidney disease. HIFs contribute to the pathogenesis of many cancers, particularly the clear cell type of renal cell carcinoma in which loss of function of the von Hippel-Lindau tumor suppressor blocks HIF-2α degradation. A small molecule inhibitor that binds to HIF-2α and blocks dimerization with HIF-1β is in clinical trials for the treatment of renal cell carcinoma. Targeting HIFs for stabilization or inhibition may improve outcomes in diseases that are common causes of mortality in the US population.
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Affiliation(s)
- Gregg L Semenza
- Institute for Cell Engineering, McKusick-Nathans Institute of Genetic Medicine, and Departments of Pediatrics, Medicine, Oncology, Radiation Oncology, and Biological Chemistry, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA;
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Hypoxia-inducible factor prolyl hydroxylase inhibitor in the treatment of anemia in chronic kidney disease. Curr Opin Nephrol Hypertens 2020; 29:414-422. [DOI: 10.1097/mnh.0000000000000617] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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107
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Akizawa T, Iwasaki M, Yamaguchi Y, Majikawa Y, Reusch M. Phase 3, Randomized, Double-Blind, Active-Comparator (Darbepoetin Alfa) Study of Oral Roxadustat in CKD Patients with Anemia on Hemodialysis in Japan. J Am Soc Nephrol 2020; 31:1628-1639. [PMID: 32493693 PMCID: PMC7350993 DOI: 10.1681/asn.2019060623] [Citation(s) in RCA: 128] [Impact Index Per Article: 32.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2019] [Accepted: 04/01/2020] [Indexed: 01/24/2023] Open
Abstract
BACKGROUND Roxadustat is an oral hypoxia-inducible factor prolyl hydroxylase inhibitor approved in China for dialysis-dependent CKD anemia. METHODS This phase 3, 24-week, double-blind, double-dummy study evaluated roxadustat's noninferiority to darbepoetin alfa for hemodialysis-dependent CKD anemia. We randomly assigned Japanese patients to oral roxadustat three times weekly or to darbepoetin alfa injections once weekly, titrating doses to maintain hemoglobin between 10-12 g/dl. The primary end point was change of average hemoglobin from baseline to weeks 18-24 (∆Hb18-24). Secondary end points were average hemoglobin and proportion of patients with hemoglobin between 10-12 g/dl (maintenance rate) at weeks 18-24, and iron parameters. Safety assessments included treatment-emergent adverse events and adjudicated ophthalmologic findings. RESULTS We randomly assigned 303 patients to roxadustat (n=151) or darbepoetin alfa (n=152). The difference between roxadustat and darbepoetin alfa in ∆Hb18-24 was -0.02 g/dl (95% confidence interval, -0.18 to 0.15), confirming roxadustat's noninferiority to darbepoetin alfa. Average hemoglobin at weeks 18-24 with roxadustat was 10.99 g/dl (95% confidence interval: 10.88 to 11.10), confirming its efficacy. Among patients with one or more hemoglobin value during weeks 18-24, the maintenance rate was 95.2% with roxadustat and 91.3% with darbepoetin alfa. Serum iron, ferritin, and transferrin saturation remained clinically stable with roxadustat; transferrin and total iron binding capacity increased through week 4 before stabilizing. Common treatment-emergent adverse events were nasopharyngitis, shunt stenosis, diarrhea, contusion, and vomiting. The proportion of patients with new or worsening retinal hemorrhage was 32.4% with roxadustat and 36.6% with darbepoetin alfa. We observed no clinically meaningful changes in retinal thickness groups. CONCLUSIONS Roxadustat maintained hemoglobin within 10-12 g/dl in patients on hemodialysis and was noninferior to darbepoetin alfa. Treatment-emergent adverse events were consistent with previous reports. CLINICAL TRIAL REGISTRY NAME AND REGISTRATION NUMBER A Study of Intermittent Oral Dosing of ASP1517 in Hemodialysis Chronic Kidney Disease Patients with Anemia, NCT02952092 (ClinicalTrials.gov).
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Affiliation(s)
- Tadao Akizawa
- Department of Nephrology, Showa University School of Medicine, Tokyo, Japan
| | - Manabu Iwasaki
- Department of Data Science, Yokohama City University, Yokohama, Japan
| | - Yusuke Yamaguchi
- Japan-Asia Data Science, Development, Astellas Pharma, Inc., Tokyo, Japan
| | - Yoshikatsu Majikawa
- Japan-Asia Clinical Development 2, Development, Astellas Pharma, Inc., Tokyo, Japan
| | - Michael Reusch
- Development Medical Science Urology and Nephrology, Astellas Pharma Europe B.V., Leiden, The Netherlands
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Provenzano R, Tumlin J, Zabaneh R, Chou J, Hemmerich S, Neff TB, Yu KHP. Oral Hypoxia-Inducible Factor Prolyl Hydroxylase Inhibitor Roxadustat (FG-4592) for Treatment of Anemia in Chronic Kidney Disease: A Placebo-Controlled Study of Pharmacokinetic and Pharmacodynamic Profiles in Hemodialysis Patients. J Clin Pharmacol 2020; 60:1432-1440. [PMID: 32603526 PMCID: PMC7586807 DOI: 10.1002/jcph.1648] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2019] [Accepted: 04/28/2020] [Indexed: 12/19/2022]
Abstract
Roxadustat (FG‐4592), an oral hypoxia‐inducible factor prolyl hydroxylase inhibitor that stimulates erythropoiesis, was evaluated in a phase 1b study in patients with end‐stage renal disease with anemia on hemodialysis. Seventeen patients, on epoetin‐alfa maintenance therapy with stable hemoglobin levels ≥10 g/dL, had epoetin‐alfa discontinued on day 3 and were enrolled in this double‐blind placebo‐controlled study. Two cohorts were randomized 3:1 (roxadustat: placebo). Patients received single doses of roxadustat (1 or 2 mg/kg) or placebo 1 hour after hemodialysis on day 1 and 2 hours before dialysis on day 8. Maximum plasma concentration and area under the plasma concentration–time curve for patients receiving roxadustat were slightly more than dose proportional and elimination half‐life ranged from 14.7 to 19.4 hours. Roxadustat was highly protein bound (99%) in plasma, and dialysis contributed a small fraction of the total clearance: only 4.56% and 3.04% of roxadustat recovered from the 1 and 2 mg/kg dose groups, respectively. Roxadustat induced transient elevations of endogenous erythropoietin that peaked between 7 and 14 hours after dosing and returned to baseline by 48 hours after dosing. Peak median endogenous erythropoietin levels were 96 mIU/mL and 268 mIU/mL for the 1‐ and 2‐mg/kg doses, respectively, within physiologic range of endogenous erythropoietin responses to hypoxia at high altitude or after blood loss. No serious adverse events were reported, and there were no treatment‐ or dose‐related trends in adverse event incidence.
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Affiliation(s)
- Robert Provenzano
- Department of Medicine, Wayne State University, Detroit, Michigan, USA
| | - James Tumlin
- Southeast Renal Research Institute, Chattanooga, Tennessee, USA
| | - Raja Zabaneh
- Northwest Louisiana Nephrology Research, Shreveport, Louisiana, USA
| | - James Chou
- FibroGen, Inc., San Francisco, California, USA
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Akizawa T, Yamaguchi Y, Otsuka T, Reusch M. A Phase 3, Multicenter, Randomized, Two-Arm, Open-Label Study of Intermittent Oral Dosing of Roxadustat for the Treatment of Anemia in Japanese Erythropoiesis-Stimulating Agent-Naïve Chronic Kidney Disease Patients Not on Dialysis. Nephron Clin Pract 2020; 144:372-382. [PMID: 32580188 DOI: 10.1159/000508100] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Accepted: 04/20/2020] [Indexed: 12/13/2022] Open
Abstract
INTRODUCTION Roxadustat is an oral hypoxia-inducible factor prolyl hydroxylase inhibitor approved for the treatment of anemia in Japan for patients with dialysis-dependent (DD) chronic kidney disease (CKD). OBJECTIVE Multicenter, randomized, open-label, noncomparative, phase 3 study to evaluate roxadustat for anemia of non-dialysis-dependent (NDD) CKD in Japan. METHODS Erythropoiesis stimulating agent (ESA)-naïve NDD-CKD patients were randomized to roxadustat (initial dose, 50 or 70 mg 3 times weekly), titrated to maintain hemoglobin (Hb) within 10.0-12.0 g/dL, for ≤24 weeks. Patients with either transferrin saturation of ≥5% or serum ferritin of ≥30 ng/mL during the screening period were eligible. Endpoints included response rate (proportion of patients achieving Hb ≥10.0 or ≥10.5 g/dL and Hb increase ≥1.0 g/dL from baseline) at end of treatment; average Hb (weeks 18-24); change of average Hb from baseline to weeks 18-24; maintenance rate (proportion of patients achieving Hb 10.0-12.0 g/dL at weeks 18-24); rate of rise (RoR) of Hb from weeks 0-4, discontinuation, or dose adjustment. Adverse events were monitored throughout the study. RESULTS Of 135 patients who provided informed consent, 100 were randomized and 99 received roxadustat (50 mg, n = 49; 70 mg, n = 50). The mean (SD) dose of roxadustat per intake at week 22 was 36.3 (22.7) mg in the roxadustat 50 mg group and 36.8 (16.0) mg in the roxadustat 70 mg group. Prior medications included oral iron therapy (20.2%) and intravenous iron therapy (1.0%). Overall response rate (95% CI) was 97.0% (91.4, 99.4; Hb ≥10.0 g/dL) and 94.9% (88.6, 98.3; Hb ≥10.5 g/dL). Mean (SD) Hb (weeks 18-24) was 11.17 (0.62) g/dL. Mean (SD) change of Hb from baseline (weeks 18-24) was 1.34 (0.86) g/dL. Maintenance rate (95% CI) was 88.8% (80.3, 94.5) among patients with ≥1 Hb measurement during weeks 18-24. Mean (SD) RoR of Hb was 0.291 (0.197) g/dL/week (50 mg) and 0.373 (0.235) g/dL/week (70 mg). Nasopharyngitis and hypertension were the most common adverse events. CONCLUSION Roxadustat increased and maintained Hb in ESA-naïve, partially iron-depleted NDD-CKD patients with anemia.
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Affiliation(s)
- Tadao Akizawa
- Division of Nephrology, Department of Medicine, Showa University School of Medicine, Tokyo, Japan,
| | | | - Tetsuro Otsuka
- Japan-Asia Clinical Development 2, Development, Astellas Pharma, Inc., Tokyo, Japan
| | - Michael Reusch
- Therapeutic Area Medical Specialties, Astellas Pharma Europe B.V., Leiden, The Netherlands
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Souza E, Cho KH, Harris ST, Flindt NR, Watt RK, Pai AB. Hypoxia-inducible factor prolyl hydroxylase inhibitors: a paradigm shift for treatment of anemia in chronic kidney disease? Expert Opin Investig Drugs 2020; 29:831-844. [PMID: 32476498 DOI: 10.1080/13543784.2020.1777276] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
INTRODUCTION The hypoxia-inducible factor prolyl hydroxylase (HIF-PH) pathway is responsible for regulating the biosynthesis of erythropoietin (EPO) and maintaining iron homeostasis. Investigational drugs that target the HIF-PH pathway are promising alternatives for treating anemia in Chronic Kidney Disease (CKD). AREAS COVERED This review summarizes recent advances focused on the clinical development of HIF-PH inhibitors (HIF-PHIs) as potentially novel therapies in the treatment of anemia in CKD based on publications available on PubMed and restricted Google searches. We provide a comparison between HIF-PHIs regarding their pharmacokinetics, dosing regimens and safety concerns, structure-activity relationships, and alterations in key laboratory parameters observed in animal models and clinical trials. EXPERT OPINION HIF-PHIs may be advantageous in some aspects compared to the conventional erythropoiesis-stimulating agents (ESAs). While ESAs could increase the risk of cardiovascular events due to rapid rises in ESA blood levels, HIF-PHIs have been reported to maintain EPO concentrations at levels that are closer to the normal physiological ranges. Although HIF-PHIs have been demonstrated to be relatively safe and effective in clinical trials, long-term safety data are needed in order to establish whether these therapeutic agents will lead to a major paradigm change in the treatment of anemia of CKD.
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Affiliation(s)
- Ernane Souza
- Department of Clinical Pharmacy, University of Michigan , Ann Arbor, MI, USA
| | - Katherine H Cho
- Department of Clinical Pharmacy, University of Michigan , Ann Arbor, MI, USA
| | - Shelby T Harris
- Department of Chemistry and Biochemistry, Brigham Young University , Provo, UT, USA
| | - Naomi R Flindt
- Department of Chemistry and Biochemistry, Brigham Young University , Provo, UT, USA
| | - Richard K Watt
- Department of Chemistry and Biochemistry, Brigham Young University , Provo, UT, USA
| | - Amy Barton Pai
- Department of Clinical Pharmacy, University of Michigan , Ann Arbor, MI, USA
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del Balzo U, Signore PE, Walkinshaw G, Seeley TW, Brenner MC, Wang Q, Guo G, Arend MP, Flippin LA, Chow FA, Gervasi DC, Kjaergaard CH, Langsetmo I, Guenzler V, Liu DY, Klaus SJ, Lin A, Neff TB. Nonclinical Characterization of the Hypoxia-Inducible Factor Prolyl Hydroxylase Inhibitor Roxadustat, a Novel Treatment of Anemia of Chronic Kidney Disease. J Pharmacol Exp Ther 2020; 374:342-353. [DOI: 10.1124/jpet.120.265181] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Accepted: 05/13/2020] [Indexed: 12/12/2022] Open
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112
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Locatelli F, Del Vecchio L. Are prolyl-hydroxylase inhibitors potential alternative treatments for anaemia in patients with chronic kidney disease? Nephrol Dial Transplant 2020; 35:926-932. [DOI: 10.1093/ndt/gfz031] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023] Open
Abstract
Abstract
Prolyl-hydroxylase (PHD) inhibitors (PHD-I) are the most appealing drugs undergoing clinical development for the treatment of anaemia in patients with chronic kidney disease. PHD inhibition mimics the exposure of the body to hypoxia and activates the hypoxia-inducible factor system. Among many other pathways, this activation promotes the production of endogenous erythropoietin (EPO) and the absorption and mobilization of iron. PHD-I are given orally and, differing from erythropoiesis-stimulating agents (ESAs), they correct and maintain haemoglobin levels by stimulating endogenous EPO production. Their efficacy and safety are supported by several Phases I and II studies with relatively short follow-up. This class of drugs has the potential to have a better safety profile than ESAs and there may be additional advantages for cardiovascular disease (CVD), osteoporosis and metabolism. However, possible adverse outcomes are feared. These span from the worsening or occurrence of new cancer, to eye complications or pulmonary hypertension. The data from the ongoing Phase III studies are awaited to better clarify the long-term safety and possible advantages of PHD-I.
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Affiliation(s)
- Francesco Locatelli
- Department of Nephrology and Dialysis, Alessandro Manzoni Hospital ASST-Lecco, Lecco, Italy
| | - Lucia Del Vecchio
- Department of Nephrology and Dialysis, Alessandro Manzoni Hospital ASST-Lecco, Lecco, Italy
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113
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Rubinsztajn A, Fouque D. Prolyl-hydroxylase domain inhibitors in chronic kidney disease, a promising alternative for erythropoiesis-stimulating agent. Eur J Intern Med 2020; 76:28-30. [PMID: 32327320 DOI: 10.1016/j.ejim.2020.04.033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 04/06/2020] [Accepted: 04/15/2020] [Indexed: 10/24/2022]
Affiliation(s)
- A Rubinsztajn
- Division of Nephrology, Nutrition, Dialysis; Hôpital Lyon Sud, Hospices Civils de Lyon, Université de Lyon, F-69495 Pierre Bénite, France
| | - D Fouque
- Division of Nephrology, Nutrition, Dialysis; Hôpital Lyon Sud, Hospices Civils de Lyon, Université de Lyon, F-69495 Pierre Bénite, France
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Deguchi H, Ikeda M, Ide T, Tadokoro T, Ikeda S, Okabe K, Ishikita A, Saku K, Matsushima S, Tsutsui H. Roxadustat Markedly Reduces Myocardial Ischemia Reperfusion Injury in Mice. Circ J 2020; 84:1028-1033. [PMID: 32213720 DOI: 10.1253/circj.cj-19-1039] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
BACKGROUND Ischemic preconditioning (IPC) is an effective procedure to protect against ischemia/reperfusion (I/R) injury. Hypoxia-inducible factor-1α (Hif-1α) is a key molecule in IPC, and roxadustat (RXD), a first-in-class prolyl hydroxylase domain-containing protein inhibitor, has been recently developed to treat anemia in patients with chronic kidney disease. Thus, we investigated whether RXD pretreatment protects against I/R injury. METHODS AND RESULTS RXD pretreatment markedly reduced the infarct size and suppressed plasma creatinine kinase activity in a murine I/R model. Analysis of oxygen metabolism showed that RXD could produce ischemic tolerance by shifting metabolism from aerobic to anaerobic respiration. CONCLUSIONS RXD pretreatment may be a novel strategy against I/R injury.
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Affiliation(s)
- Hiroko Deguchi
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, Kyushu University
| | - Masataka Ikeda
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, Kyushu University
| | - Tomomi Ide
- Department of Experimental and Clinical Cardiovascular Medicine, Faculty of Medical Sciences, Kyushu University
| | - Tomonori Tadokoro
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, Kyushu University
| | - Soichiro Ikeda
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, Kyushu University
| | - Kosuke Okabe
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, Kyushu University
| | - Akihito Ishikita
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, Kyushu University
| | - Keita Saku
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, Kyushu University
| | | | - Hiroyuki Tsutsui
- Department of Cardiovascular Medicine, Faculty of Medical Sciences, Kyushu University
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Besarab A, Drueke TB. The problem with transferrin saturation as an indicator of iron 'sufficiency' in chronic kidney disease. Nephrol Dial Transplant 2020; 36:1377-1383. [PMID: 32301986 DOI: 10.1093/ndt/gfaa048] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2019] [Accepted: 02/06/2020] [Indexed: 02/07/2023] Open
Abstract
After a brief review of physiological iron metabolism, we describe diagnostic tests for iron status and iron deficiency anemia in patients without chronic kidney disease (CKD) or inflammation. Thereafter we review the dysregulation of iron metabolism in CKD. Specific emphasis is placed on the role of the 'inflammatory' state that develops with the progression of CKD. It invokes changes in iron metabolism that are the exact opposite of those occurring during pure iron deficiency. As a result, transferrin saturation (TSAT) becomes a poorer index of iron availability to the bone marrow and serum ferritin no longer represents iron that can be used during erythropoiesis. We argue that serum iron may provide more information to guide iron therapy than TSAT. In other words, the emphasis on TSAT is misplaced. With the development of a number of hypoxia-inducible factor prolyl hydroxylase inhibitors, which restore iron metabolism toward the 'physiologic state', the iron indices indicating sufficient iron availability to avoid functional iron deficiency during therapy of CKD-associated anemia are likely to change. We summarize these changes in the section 'A peek into things to come!', citing the available data.
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Affiliation(s)
- Anatole Besarab
- Stanford University School of Medicine, Stanford University, Stanford, CA, USA
| | - Tilman B Drueke
- INSERM U1018, Team 5, CESP, Paris Saclay University, Paris-Sud Univ, UVSQ, Villejuif, France
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Abstract
PURPOSE OF REVIEW We will examine the current and future options in management of anemia in dialysis patients focusing on recent trials in iron supplementation and alternatives to erythropoietin-stimulating agents (ESAs). RECENT FINDINGS We review the literature on Erythropoietin (EPO)-stimulating agents, focusing on the risk benefits of various options available. We review the recent practice changing trial in iron supplementation in dialysis patients with chronic kidney disease and movements in the research on alternatives to EPO-stimulating agents primarily hypoxia-inducible factor prolyl hydroxylase inhibitors (HIF-PHIs). SUMMARY ESAs constitute the mainstay of treatment of anemia in dialysis and evidence does not support the preference of any one type over the other. But concerns exist about the cardiovascular safety of supra-physiological ESA levels. Iron supplementation has been shown to be a well tolerated method to decrease ESA doses while maintaining hemoglobin levels and recent evidence should result in a revisiting of the guidelines for iron supplementation. HIF-PHIs are potentially safe alternatives to ESAs that correct and maintain hemoglobin while maintaining physiological levels of erythropoietin. Ongoing phase III trials for these drugs will likely answer questions of long-term safety regarding these drugs.
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Locatelli F, Del Vecchio L, De Nicola L, Minutolo R. Are all erythropoiesis-stimulating agents created equal? Nephrol Dial Transplant 2020; 36:1369-1377. [PMID: 32206785 DOI: 10.1093/ndt/gfaa034] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Accepted: 12/29/2019] [Indexed: 12/17/2022] Open
Abstract
Erythropoiesis-stimulating agents (ESAs) are effective drugs to correct and maintain haemoglobin (Hb) levels, however, their use at doses to reach high Hb targets has been associated with an increased risk of cardiovascular adverse events, mortality and cancer. Presently used ESAs have a common mechanism of action but different pharmacokinetic and pharmacodynamic characteristics. Accordingly, the mode of activation of the erythropoietin (EPO) receptor can exert marked differences in downstream events. It is unknown whether the various ESA molecules have different efficacy/safety profiles. The relative mortality and morbidity risks associated with the use of different types of ESAs remains poorly evaluated. Recently an observational study and a randomized clinical trial provided conflicting results regarding this matter. However, these two studies displayed several differences in patient characteristics and ESA molecules used. More importantly, by definition, randomized clinical trials avoid bias by indication and suffer less from confounding factors. Therefore they bring a higher degree of evidence. The scenario becomes even more complex when considering the new class of ESAs, called prolyl-hydroxylase domain (PHD) inhibitors. They are oral drugs that mimic exposure to hypoxia and stabilize hypoxia-inducible factor α. They profoundly differ from presently used ESAs, as they have multiple targets of action, including the stimulation of endogenous EPO synthesis, direct mobilization/absorption of iron and a higher reduction of hepcidin. Accordingly, they have the potential to be more effective in inflamed patients with functional iron deficiency, i.e. the setting of patients who are at higher risk of cardiovascular events and mortality in response to present ESA use. As for ESAs, individual PHD inhibitors differ in molecular structure and degree of selectivity for the three main PHD isoforms; their efficacy and safety profiles may therefore be different from that of presently available ESAs.
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Affiliation(s)
- Francesco Locatelli
- Past Director of the Department of Nephrology and Dialysis, Alessandro Manzoni Hospital, ASST Lecco, Lecco, Italy
| | | | - Luca De Nicola
- Department of Scienze Mediche e Chirurgiche Avanzate, Division of Nephrology, University of Campania "Luigi Vanvitelli", Naples, Italy
| | - Roberto Minutolo
- Department of Scienze Mediche e Chirurgiche Avanzate, Division of Nephrology, University of Campania "Luigi Vanvitelli", Naples, Italy
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Liu J, Zhang A, Hayden JC, Bhagavathula AS, Alshehhi F, Rinaldi G, Kontogiannis V, Rahmani J. Roxadustat (FG-4592) treatment for anemia in dialysis-dependent (DD) and not dialysis-dependent (NDD) chronic kidney disease patients: A systematic review and meta-analysis. Pharmacol Res 2020; 155:104747. [PMID: 32171893 DOI: 10.1016/j.phrs.2020.104747] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Accepted: 03/04/2020] [Indexed: 12/31/2022]
Abstract
The effect of roxadustat (FG-4592) on individuals with chronic kidney diseases (CKD) patients receiving or not receiving the dialysis was unclear. The aim of this study was to evaluate the efficacy of roxadustat for the treatment of anemia in patients who are dialysis dependent (DD) or dialysis independent (NDD) CKD. We performed a systematic review of randomised controlled trials (RCTs) comparing treatment with roxadustat versus placebo or epoetin alfa up to November 2019. We investigated the efficacy of roxadustat in the levels of hemoglobin and other clinical parameters in renal anemia in patients with NDD and DD-CKD. We estimated weighted-mean difference (WMD) using random effect models. We included six RCTs comprising 1001 patients of whom 70.6 % were treated with roxadustat and 294 controls. The control group for studies of NDD-CKD patients was placebo whereas an active control of epoetin-alfa was used in studies of DD-CKD patients. Median follow-up time was 8 weeks. All trials were industry-sponsored. Overall, roxadustat increased hemoglobin levels by 1.20 g/dl (95 % CI:0.66, 1.75,P < 0.0001,I2 = 99.3 %). Hemoglobin levels increased by 1.99 g/dl in NDD-CKD patients versus placebo and 0.52 g/dl in DD-CKD patients versus epoetin-alfa. Roxadustat was associated with a decrease the levels of hepcidin by -49.3 ng/dl (-38.5 ng/dl in NDD patients versus placebo and -27.7 ng/dl in DD patients versus epoetin alfa), a decrease in ferritin of -49.7 μmol/l (-52.2 μmol/l in NDD patients versus placebo and -7.3 μmol/l in DD patients versus epoetin alfa), and increase in total iron-binding capacity of 32.2 μmol/l (14.1 μmol/l in NDD patients versus placebo and 13.6 μmol/l in DD patients versus epoetin alfa). The percentage change in the transferrin saturation levels was -2.07 % (-6%, NDD patients versus placebo, and +3.7 % in DD patients versus epoetin alfa) in anemia associated CKD patients. This review found roxadustast increases the levels of hemoglobin, serum transferrin, intestinal iron absorption, and reduces hepcidin in both NDD and DD-CKD patients. Safety data is still emerging.
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Affiliation(s)
- Junduo Liu
- Department of Nephrology, The 1(st) Central Hospital of Tianjin, Tianjin, 300252, China.
| | - Afang Zhang
- Department of Clinical Laboratory, Occupational Disease Prevention Hospital of Tianjin, Tianjin,300021, China
| | - John C Hayden
- School of Pharmacy and Biomoleculat Sciences, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Akshaya Srikanth Bhagavathula
- Department of Internal Medicine, College of Medicine and Health Sciences, UAE University, Al Ain, United Arab Emirates
| | - Fatema Alshehhi
- Department of Internal Medicine, Sheikh Khalifa Medical City, Abu Dhabi, United Arab Emirates
| | - Giulia Rinaldi
- Medical Department, St George's University, London, Greater London, UK
| | | | - Jamal Rahmani
- Department of Pharmacology, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Laitakari A, Huttunen R, Kuvaja P, Hannuksela P, Szabo Z, Heikkilä M, Kerkelä R, Myllyharju J, Dimova EY, Serpi R, Koivunen P. Systemic long-term inactivation of hypoxia-inducible factor prolyl 4-hydroxylase 2 ameliorates aging-induced changes in mice without affecting their life span. FASEB J 2020; 34:5590-5609. [PMID: 32100354 DOI: 10.1096/fj.201902331r] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 02/07/2020] [Accepted: 02/13/2020] [Indexed: 12/27/2022]
Abstract
Hypoxia inactivates hypoxia-inducible factor (HIF) prolyl 4-hydroxylases (HIF-P4Hs), which stabilize HIF and upregulate genes to restore tissue oxygenation. HIF-P4Hs can also be inhibited by small molecules studied in clinical trials for renal anemia. Knowledge of systemic long-term inactivation of HIF-P4Hs is limited but crucial, since HIF overexpression is associated with cancers. We aimed to determine the effects of systemic genetic inhibition of the most abundant isoenzyme HIF prolyl 4-hydroxylase-2 (HIF-P4H-2)/PHD2/EglN1 on life span and tissue homeostasis in aged mice. Our data showed no difference between wild-type and HIF-P4H-2-deficient mice in the average age reached. There were several differences, however, in the primary causes of death and comorbidities, the HIF-P4H-2-deficient mice having less inflammation, liver diseases, including cancer, and myocardial infarctions, and not developing anemia. No increased cancer incidence was observed due to HIF-P4H-2-deficiency. These data suggest that chronic inactivation of HIF-P4H-2 is not harmful but rather improves the quality of life in senescence.
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Affiliation(s)
- Anna Laitakari
- Biocenter Oulu, Faculty of Biochemistry and Molecular Medicine, Oulu Center for Cell-Matrix Research, University of Oulu, Oulu, Finland
| | - Riikka Huttunen
- Biocenter Oulu, Faculty of Biochemistry and Molecular Medicine, Oulu Center for Cell-Matrix Research, University of Oulu, Oulu, Finland
| | - Paula Kuvaja
- Cancer and Translational Medicine Research Unit, Medical Research Center Oulu, Oulu University Hospital, University of Oulu, Oulu, Finland.,Department of Pathology, Oulu University Hospital, Oulu, Finland
| | - Pauliina Hannuksela
- Biocenter Oulu, Faculty of Biochemistry and Molecular Medicine, Oulu Center for Cell-Matrix Research, University of Oulu, Oulu, Finland
| | - Zoltan Szabo
- Research Unit of Biomedicine, Department of Pharmacology and Toxicology, University of Oulu, Oulu, Finland
| | - Minna Heikkilä
- Biocenter Oulu, Faculty of Biochemistry and Molecular Medicine, Oulu Center for Cell-Matrix Research, University of Oulu, Oulu, Finland
| | - Risto Kerkelä
- Research Unit of Biomedicine, Department of Pharmacology and Toxicology, University of Oulu, Oulu, Finland
| | - Johanna Myllyharju
- Biocenter Oulu, Faculty of Biochemistry and Molecular Medicine, Oulu Center for Cell-Matrix Research, University of Oulu, Oulu, Finland
| | - Elitsa Y Dimova
- Biocenter Oulu, Faculty of Biochemistry and Molecular Medicine, Oulu Center for Cell-Matrix Research, University of Oulu, Oulu, Finland
| | - Raisa Serpi
- Biocenter Oulu, Faculty of Biochemistry and Molecular Medicine, Oulu Center for Cell-Matrix Research, University of Oulu, Oulu, Finland
| | - Peppi Koivunen
- Biocenter Oulu, Faculty of Biochemistry and Molecular Medicine, Oulu Center for Cell-Matrix Research, University of Oulu, Oulu, Finland
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Akizawa T, Ueno M, Shiga T, Reusch M. Oral roxadustat three times weekly in ESA-naïve and ESA-converted patients with anemia of chronic kidney disease on hemodialysis: Results from two phase 3 studies. Ther Apher Dial 2020; 24:628-641. [PMID: 31891449 PMCID: PMC7687179 DOI: 10.1111/1744-9987.13468] [Citation(s) in RCA: 50] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2019] [Revised: 12/17/2019] [Accepted: 12/27/2019] [Indexed: 12/17/2022]
Abstract
Roxadustat is a hypoxia-inducible factor prolyl hydroxylase inhibitor approved in China for anemia of dialysis-dependent chronic kidney disease (CKD). Japanese hemodialysis patients with anemia of CKD previously naïve to, or converted from, erythropoiesis-stimulating agents (ESAs) were enrolled in two open-label, noncomparative studies of titrated oral roxadustat administered three times weekly. ESA-naïve patients (n = 75) were randomized to roxadustat (initial dose, 50 or 70 mg) for 24 weeks; ESA-converted patients (n = 164) were assigned to roxadustat (initial dose, 70 or 100 mg based on prior ESA dose) for 52 weeks. Efficacy outcomes included average hemoglobin (Hb, weeks 18-24 or 46-52), change of Hb from baseline to weeks 18 to 24 (ΔHb18-24 ) or weeks 46 to 52 (ΔHb46-52 ), and maintenance rate (proportion of patients who achieved average Hb of 10.0-12.0 g/dL for weeks 18-24 or weeks 46-52). Treatment-emergent adverse events (TEAEs) were monitored. Mean (SD) Hb was 10.93 (0.79) g/dL (weeks 18-24) (ESA-Naïve Study), and 10.93 (0.69; weeks 18-24) g/dL and 11.11 (0.67; weeks 46-52) g/dL (ESA-Converted Study). Mean (SD) ΔHb18-24 was 2.26 (1.02) g/dL (ESA-Naïve Study) and -0.03 (0.90) g/dL (ESA-Converted Study); mean (SD) ΔHb46-52 was 0.12 (0.83) g/dL (ESA-Converted Study). The overall maintenance rate was 73.0% (54/74) (ESA-Naïve Study) (weeks 18-24), and 79.1% (129/163; weeks 18-24) and 71.2% (116/163; weeks 46-52) (ESA-Converted Study). Nasopharyngitis was the most common TEAE. Two deaths, considered unrelated to roxadustat, occurred in the ESA-Converted Study. Roxadustat effectively corrected and maintained Hb, regardless of previous ESA treatment, in Japanese anemic CKD patients on hemodialysis.
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Affiliation(s)
| | - Mai Ueno
- Astellas Pharma, Inc., Tokyo, Japan
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Sugahara M, Tanaka S, Tanaka T, Saito H, Ishimoto Y, Wakashima T, Ueda M, Fukui K, Shimizu A, Inagi R, Yamauchi T, Kadowaki T, Nangaku M. Prolyl Hydroxylase Domain Inhibitor Protects against Metabolic Disorders and Associated Kidney Disease in Obese Type 2 Diabetic Mice. J Am Soc Nephrol 2020; 31:560-577. [PMID: 31996409 DOI: 10.1681/asn.2019060582] [Citation(s) in RCA: 66] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2019] [Accepted: 12/12/2019] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Prolyl hydroxylase domain (PHD) inhibitors, which stimulate erythropoietin production through the activation of hypoxia-inducible factor (HIF), are novel therapeutic agents used for treating renal anemia. Several PHD inhibitors, including enarodustat, are currently undergoing phase 2 or phase 3 clinical trials. Because HIF regulates a broad spectrum of genes, PHD inhibitors are expected to have other effects in addition to erythropoiesis, such as protection against metabolic disorders. However, whether such beneficial effects would extend to metabolic disorder-related kidney disease is largely unknown. METHODS We administered enarodustat or vehicle without enarodustat in feed to diabetic black and tan brachyury (BTBR) ob/ob mice from 4 to 22 weeks of age. To elucidate molecular changes induced by enarodustat, we performed transcriptome analysis of isolated glomeruli and in vitro experiments using murine mesangial cells. RESULTS Compared with BTBR ob/ob mice that received only vehicle, BTBR ob/ob mice treated with enarodustat displayed lower body weight, reduced blood glucose levels with improved insulin sensitivity, lower total cholesterol levels, higher adiponectin levels, and less adipose tissue, as well as a tendency for lower macrophage infiltration. Enarodustat-treated mice also exhibited reduced albuminuria and amelioration of glomerular epithelial and endothelial damage. Transcriptome analysis of isolated glomeruli revealed reduced expression of C-C motif chemokine ligand 2/monocyte chemoattractant protein-1 (CCL2/MCP-1) in enarodustat-treated mice compared with the vehicle-only group, accompanied by reduced glomerular macrophage infiltration. In vitro experiments demonstrated that both local HIF-1 activation and restoration of adiponectin by enarodustat contributed to CCL2/MCP-1 reduction in mesangial cells. CONCLUSIONS These results indicate that the PHD inhibitor enarodustat has potential renoprotective effects in addition to its potential to protect against metabolic disorders.
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Affiliation(s)
| | | | | | | | | | - Takeshi Wakashima
- Biological and Pharmacological Laboratories, Central Pharmaceutical Research Institute, Japan Tobacco Inc., Osaka, Japan; and
| | - Masatoshi Ueda
- Biological and Pharmacological Laboratories, Central Pharmaceutical Research Institute, Japan Tobacco Inc., Osaka, Japan; and
| | - Kenji Fukui
- Biological and Pharmacological Laboratories, Central Pharmaceutical Research Institute, Japan Tobacco Inc., Osaka, Japan; and
| | - Akira Shimizu
- Department of Analytic Human Pathology, Nippon Medical School, Tokyo, Japan
| | - Reiko Inagi
- Division of Chronic Kidney Disease Pathophysiology, and
| | - Toshimasa Yamauchi
- Department of Diabetes and Metabolic Diseases, The University of Tokyo Graduate School of Medicine, Tokyo, Japan
| | - Takashi Kadowaki
- Department of Diabetes and Metabolic Diseases, The University of Tokyo Graduate School of Medicine, Tokyo, Japan
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The Influence of Inflammation on Anemia in CKD Patients. Int J Mol Sci 2020; 21:ijms21030725. [PMID: 31979104 PMCID: PMC7036805 DOI: 10.3390/ijms21030725] [Citation(s) in RCA: 64] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 01/15/2020] [Accepted: 01/19/2020] [Indexed: 02/06/2023] Open
Abstract
Anemia is frequently observed in the course of chronic kidney disease (CKD) and it is associated with diminishing the quality of a patient’s life. It also enhances morbidity and mortality and hastens the CKD progression rate. Patients with CKD frequently suffer from a chronic inflammatory state which is related to a vast range of underlying factors. The results of studies have demonstrated that persistent inflammation may contribute to the variability in Hb levels and hyporesponsiveness to erythropoietin stimulating agents (ESA), which are frequently observed in CKD patients. The understanding of the impact of inflammatory cytokines on erythropoietin production and hepcidin synthesis will enable one to unravel the net of interactions of multiple factors involved in the pathogenesis of the anemia of chronic disease. It seems that anti-cytokine and anti-oxidative treatment strategies may be the future of pharmacological interventions aiming at the treatment of inflammation-associated hyporesponsiveness to ESA. The discovery of new therapeutic approaches towards the treatment of anemia in CKD patients has become highly awaited. The treatment of anemia with erythropoietin (EPO) was associated with great benefits for some patients but not all.
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Nagy A, Pethő D, Gáll T, Zavaczki E, Nyitrai M, Posta J, Zarjou A, Agarwal A, Balla G, Balla J. Zinc Inhibits HIF-Prolyl Hydroxylase Inhibitor-Aggravated VSMC Calcification Induced by High Phosphate. Front Physiol 2020; 10:1584. [PMID: 32009983 PMCID: PMC6974455 DOI: 10.3389/fphys.2019.01584] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 12/17/2019] [Indexed: 12/11/2022] Open
Abstract
Vascular calcification is a life-threatening clinical condition in chronic kidney disease (CKD) and is associated with reduced zinc serum levels. Anemia is another frequent complication of CKD. Hypoxia-inducible factor (HIF) stabilizers, also known as HIF prolyl hydroxylase inhibitors (PHI), are promising candidates to treat CKD-associated anemia by increasing erythropoietin synthesis. Recent evidence suggests that HIFs play a pivotal role in vascular calcification. Our study explored feasible impacts of HIF PHI on phosphate (Pi)-induced calcification of vascular smooth muscle cells (VSMCs) and tested whether zinc might inhibit this mineralization process. Treatment of VSMCs with PHI aggravated Pi-induced calcium deposition and Pi uptake. PHI promoted Pi-induced loss of smooth muscle cell markers (ACTA-2, MYH11, SM22α) and enhanced osteochondrogenic gene expression (Msx-2, BMP-2, Sp7) triggering osteochondrogenic phenotypic switch of VSMCs. These effects of PHI paralleled with increased pyruvate dehydrogenase kinase 4 (PDK4) expression, decreased Runx2 Ser451 phosphorylation, and reduced cell viability. Zinc inhibited Pi-induced mineralization of VSMCs in a dose-dependent manner and also attenuated the pro-calcification effect of PHI in Pi-induced mineralization. Zinc inhibited osteochondrogenic phenotypic switch of VSMCs reflected by lowering Pi uptake, decreasing the expressions of Msx-2, BMP-2, and Sp7 as well as the loss of smooth muscle cell-specific markers. Zinc preserved phosphorylation state of Runx2 Ser451, decreased PDK4 level, and restored cell viability. PHI alone reduced the expression of smooth muscle markers without inducing mineralization, which was also inhibited by zinc. In addition, we observed a significantly lower serum zinc level in CKD as well as in patients undergoing carotid endarterectomy compared to healthy individuals. Conclusion - PHI promoted the loss of smooth muscle markers and augmented Pi-induced osteochondrogenic phenotypic switch leading to VSMCs calcification. This mineralization process was attenuated by zinc. Enhanced vascular calcification is a potential risk factor during PHI therapy in CKD which necessitates the strict follow up of vascular calcification and zinc supplementation.
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Affiliation(s)
- Annamária Nagy
- Department of Internal Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
- Kálmán Laki Doctoral School, University of Debrecen, Debrecen, Hungary
| | - Dávid Pethő
- Department of Internal Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
- Kálmán Laki Doctoral School, University of Debrecen, Debrecen, Hungary
| | - Tamás Gáll
- HAS-UD Vascular Biology and Myocardial Pathophysiology Research Group, Hungarian Academy of Sciences, Debrecen, Hungary
- Department of Pediatrics, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Erzsébet Zavaczki
- Department of Internal Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
- Kálmán Laki Doctoral School, University of Debrecen, Debrecen, Hungary
- HAS-UD Vascular Biology and Myocardial Pathophysiology Research Group, Hungarian Academy of Sciences, Debrecen, Hungary
| | - Mónika Nyitrai
- Department of Internal Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
- HAS-UD Vascular Biology and Myocardial Pathophysiology Research Group, Hungarian Academy of Sciences, Debrecen, Hungary
| | - József Posta
- Department of Inorganic and Analytical Chemistry, UD Faculty of Science and Technology, University of Debrecen, Debrecen, Hungary
| | - Abolfazl Zarjou
- Nephrology Research and Training Center, School of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Anupam Agarwal
- Nephrology Research and Training Center, School of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
| | - György Balla
- HAS-UD Vascular Biology and Myocardial Pathophysiology Research Group, Hungarian Academy of Sciences, Debrecen, Hungary
- Department of Pediatrics, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - József Balla
- Department of Internal Medicine, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
- HAS-UD Vascular Biology and Myocardial Pathophysiology Research Group, Hungarian Academy of Sciences, Debrecen, Hungary
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Li ZL, Tu Y, Liu BC. Treatment of Renal Anemia with Roxadustat: Advantages and Achievement. KIDNEY DISEASES 2020; 6:65-73. [PMID: 32309288 DOI: 10.1159/000504850] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/07/2019] [Accepted: 11/16/2019] [Indexed: 12/12/2022]
Abstract
Background Although renal anemia has attracted widespread attention, a large proportion of chronic kidney disease (CKD) patients with anemia still do not meet the hemoglobin (Hb) targets. The discovery of prolyl hydroxylase domain (PHD) enzymes as regulators of hypoxia-inducible factor (HIF)-dependent erythropoiesis has led to the development of novel therapeutic agents for renal anemia. Roxadustat, the first small-molecule HIF-PHD inhibitor, has completed the phase 3 trials. There are currently more than 15 phase 3 clinical trials worldwide assessing the efficacy and safety of roxadustat in CKD patients with anemia. This review will summarize recent findings of roxadustat in the treatment of renal anemia. Summary Although the administration of erythropoiesis-stimulating agents (ESAs) and iron supplementation are a well-established and highly effective therapeutic approach for renal anemia, there are several safety concerns. Current findings from phase 2 and 3 trials suggest that roxadustat is clinically effective and well tolerated. On the one hand, roxadustat could increase endogenous erythropoietin (EPO) levels within or near physiological range in a titratable manner by inducing HIF pathway activation transiently. On the other hand, roxadustat also improves iron metabolism by decreasing serum hepcidin and increasing intestinal iron absorption, which is beneficial to functional iron deficiency and absolute iron deficiency. More importantly, the erythropoietic response of roxadustat is independent of baseline inflammatory state of CKD patients. Thus, the discovery of roxadustat will revolutionize the treatment strategy for renal anemia. Key Messages Roxadustat is an emerging and promising therapeutic approach against anemia in CKD patients, which differs from those of conventional ESAs. Roxadustat corrects anemia of CKD patients through multiple pathways, beyond elevating EPO levels within physiological range, and also by handling iron metabolism (particularly decreasing the hepcidin levels). Furthermore, the Hb response of roxadustat is independent of the inflammatory microenvironment.
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Affiliation(s)
- Zuo-Lin Li
- Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine, Nanjing, China
| | - Yan Tu
- Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine, Nanjing, China
| | - Bi-Cheng Liu
- Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine, Nanjing, China
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Tanaka T. [Multiple consequences of HIF activation in CKD]. Nihon Yakurigaku Zasshi 2020; 155:30-34. [PMID: 31902844 DOI: 10.1254/fpj.19113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Tubulointerstitial hypoxia negatively influences the balance between injury and repair, and serves as a final common pathway in chronic kidney disease (CKD). Studies on erythropoietin (EPO) transcription led to the identification of hypoxia inducible factors (HIFs) and their key regulators, prolyl hydroxylases (PHDs). Based on these, several small molecule PHD inhibitors are developed for the treatment of anemia in CKD, which are currently in phase II/III clinical trials. In addition to treating anemia, application of PHD inhibitors may have several potential implications; there is a promising view that activation of the HIF signaling might protect the ischemic kidney from injury. This is extensively tested in multiple acute kidney injury models, whereas knowledge is limited in the context of CKD. Some studies demonstrate the protective effects of ameliorating inflammation and reducing oxidative stress, whereas negative consequences of sustained HIF activation, such as renal fibrosis and aggravation of polycystic kidney disease, are also reported. Recent human clinical studies reported amelioration in glucose and lipid metabolism, which may be beneficial for the treatment of metabolic kidney disorders. Renal consequences of PHD inhibitors are likely determined by multiple systemic effects of sustained HIF activation and may thus differ depending on the clinical context and the pathological stages.
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Affiliation(s)
- Tetsuhiro Tanaka
- Division of Nephrology and Endocrinology, The University of Tokyo School of Medicine
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126
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Messa P, Cappellini MD. A new approach for anemia in kidney disease. Eur J Intern Med 2020; 71:1-3. [PMID: 31784191 DOI: 10.1016/j.ejim.2019.10.035] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 10/28/2019] [Indexed: 12/17/2022]
Affiliation(s)
- Piergiorgio Messa
- Nephrology, Dialysis and Renal transplant Unit, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Università degli Studi di Milano, Milan, Italy
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Kabei K, Tateishi Y, Shiota M, Osada-Oka M, Nishide S, Uchida J, Nakatani T, Matsunaga S, Yamaguchi T, Tomita S, Miura K. Effects of orally active hypoxia inducible factor alpha prolyl hydroxylase inhibitor, FG4592 on renal fibrogenic potential in mouse unilateral ureteral obstruction model. J Pharmacol Sci 2019; 142:93-100. [PMID: 31866051 DOI: 10.1016/j.jphs.2019.12.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Revised: 11/13/2019] [Accepted: 11/27/2019] [Indexed: 12/19/2022] Open
Abstract
Orally active hypoxia-inducible factor (HIF) prolyl hydroxylase inhibitors that stabilize HIF protein and stimulate the production of erythropoietin have been approved to treat renal anemia. Our previous report suggested that HIF-1α dependent fibrogenic mechanisms are operating at the early onset of renal fibrosis and its contribution declines with the progression in mouse unilateral ureteral obstruction (UUO) model. The aim of the study is to evaluate the renal fibrogenic potential of FG4592, a recently approved orally active HIF prolyl hydroxylase inhibitor in mouse UUO model. Male C57BL/6J mice orally given FG-4592 (12.5 mg/kg/day and 50 mg/kg/day) were subjected to UUO. Neither dose of FG-4592 affected renal fibrosis or macrophage infiltration. FG-4592 had no effects on increased mRNA of collagen I, collagen III or transforming growth factor-β1. At 3 days after UUO, higher dose of FG-4592 potentiated the increased mRNA expression of profibrogenic molecules, plasminogen activator inhibitor 1 (Pai-1) and connective tissue growth factor (Ctgf) but such potentiation disappeared at 7 days after UUO. It is suggested that FG-4592 used in the present study had little effects on renal fibrosis even though high dose of FG-4592 used in the present study transiently potentiated gene expression of Pai-1 and Ctgf in the UUO kidney.
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Affiliation(s)
- Kazuya Kabei
- Department of Applied Pharmacology and Therapeutics, Osaka City University Graduate School of Medicine, Asahimachi, Abeno-ku, Osaka, 545-8585, Japan; Department of Urology, Osaka City University Graduate School of Medicine, Asahimachi, Abeno-ku, Osaka, 545-8585, Japan; Minami-Osaka Hospital, Higashikagaya, Suminoe-ku, Osaka, 559-0012, Japan
| | - Yu Tateishi
- Ishikiri Seiki Hospital, Yayoi-cho, Higashiosaka, Osaka, 579-8026, Japan
| | - Masayuki Shiota
- Department of Research Support Platform, Osaka City University Graduate School of Medicine, Asahimachi, Abeno-ku, Osaka, 545-8585, Japan
| | - Mayuko Osada-Oka
- Food Hygiene and Environmental Health Division of Applied Life Science, Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, Sakyo-ku, Kyoto, 606-8522, Japan
| | - Shunji Nishide
- Department of Urology, Osaka City University Graduate School of Medicine, Asahimachi, Abeno-ku, Osaka, 545-8585, Japan; Department of Pharmacology, Osaka City University Graduate School of Medicine, Asahimachi, Abeno-ku, Osaka, 545-8585, Japan
| | - Junji Uchida
- Department of Urology, Osaka City University Graduate School of Medicine, Asahimachi, Abeno-ku, Osaka, 545-8585, Japan
| | - Tatsuya Nakatani
- Department of Urology, Osaka City University Graduate School of Medicine, Asahimachi, Abeno-ku, Osaka, 545-8585, Japan
| | - Shinji Matsunaga
- Department of Pharmacology, Osaka City University Graduate School of Medicine, Asahimachi, Abeno-ku, Osaka, 545-8585, Japan
| | - Takehiro Yamaguchi
- Department of Pharmacology, Osaka City University Graduate School of Medicine, Asahimachi, Abeno-ku, Osaka, 545-8585, Japan
| | - Shuhei Tomita
- Department of Pharmacology, Osaka City University Graduate School of Medicine, Asahimachi, Abeno-ku, Osaka, 545-8585, Japan
| | - Katsuyuki Miura
- Department of Applied Pharmacology and Therapeutics, Osaka City University Graduate School of Medicine, Asahimachi, Abeno-ku, Osaka, 545-8585, Japan; Ishikiri Seiki Hospital, Yayoi-cho, Higashiosaka, Osaka, 579-8026, Japan; Department of Pharmacology, Osaka City University Graduate School of Medicine, Asahimachi, Abeno-ku, Osaka, 545-8585, Japan.
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Jia L, Dong X, Yang J, Jia R, Zhang H. Effectiveness of hypoxia-inducible factor prolyl hydroxylase inhibitor roxadustat on renal anemia in non-dialysis-dependent chronic kidney disease: a systematic review and meta-analysis. ANNALS OF TRANSLATIONAL MEDICINE 2019; 7:720. [PMID: 32042736 DOI: 10.21037/atm.2019.12.18] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Background Renal anemia is a severe complication of chronic kidney disease (CKD) and may worsen its prognosis. Roxadustat is the only oral hypoxia-inducible factor prolyl hydroxylase inhibitor (HIF-PHI) that has been proved effective to treat renal anemia. However, effects of roxadustat on non-dialysis-dependent CKD (NDD-CKD) have yet to be supported by evidence-based medicine. Methods Based on the databases of PubMed, EMBASE and Web of Science by 12 April 2019 (CRD42019133225), a meta-analysis of randomized controlled trials (RCTs) on roxadustat for treatment of NDD-CKD was conducted. Primary outcomes were parameters of hemoglobin (Hb) and Hb response. Secondary outcomes were hepcidin, ferritin, total iron binding capacity (TIBC), transferrin saturation (TAST), incidences of diarrhea, adverse events (AEs) and severe adverse events (SAEs). The risk of bias and the quality of evidence were assessed, respectively. Both continuous and binary variables were analyzed by the random effects models. Sensitivity analyses were performed when a significant heterogeneity was observed (P<0.1 and I2>50%). Results Finally, three studies with a total of 214 subjects in the roxadustat group and 80 subjects in the placebo group were enrolled. An increase of Hb [weighted mean difference (WMD) =1.22, 95% CI: 0.95 to 1.49, P<0.01], Hb response [odds ratio (OR) =27.74, 95% CI: 10.18 to 75.62, P<0.00001], and TIBC [standard mean difference (SMD) =1.59, 95% CI: 1.17 to 2.01, P<0.00001] was found. A decrease of hepcidin (SMD =-4.46, 95% CI: -5.02 to -3.89, P<0.00001), ferritin (WMD =-61.05, 95% CI: -85.70 to -36.40, P<0.00001) and TAST (WMD =-6.55, 95% CI: -8.82 to -4.29, P<0.00001) were noted as well. Analyses of incidence in diarrhea (OR =1.54, 95% CI: 0.49 to 4.79, P=0.46), AEs (OR =1.31, 95% CI: 0.76 to 2.27, P=0.34) and SAEs (OR =1.25, 95% CI: 0.29 to 5.35, P=0.76) yielded no difference between the roxadustat and the placebo groups. Conclusions Roxadustat improved renal anemia of NDD-CKD patients by improving Hb and iron metabolism. Oral administration of roxadustat was relatively safe in that roxadustat did not increase the incidence of AEs and SAEs.
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Affiliation(s)
- Linpei Jia
- Department of Nephrology, Xuanwu Hospital, Capital Medical University, Beijing 100053, China
| | - Xingtong Dong
- Department of Nephrology, Xuanwu Hospital, Capital Medical University, Beijing 100053, China
| | - Jingyan Yang
- Central Hospital of Cangzhou, Cangzhou 061001, China
| | - Rufu Jia
- Central Hospital of Cangzhou, Cangzhou 061001, China
| | - Hongliang Zhang
- Department of Life Sciences, the National Natural Science Foundation of China, Beijing 100085, China
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Chang WT, Lo YC, Gao ZH, Wu SN. Evidence for the Capability of Roxadustat (FG-4592), an Oral HIF Prolyl-Hydroxylase Inhibitor, to Perturb Membrane Ionic Currents: An Unidentified yet Important Action. Int J Mol Sci 2019; 20:ijms20236027. [PMID: 31795416 PMCID: PMC6928729 DOI: 10.3390/ijms20236027] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 11/18/2019] [Accepted: 11/25/2019] [Indexed: 12/13/2022] Open
Abstract
Roxadustat (FG-4592), an analog of 2-oxoglutarate, is an orally-administered, heterocyclic small molecule known to be an inhibitor of hypoxia inducible factor (HIF) prolyl hydroxylase. However, none of the studies have thus far thoroughly investigated its possible perturbations on membrane ion currents in endocrine or heart cells. In our studies, the whole-cell current recordings of the patch-clamp technique showed that the presence of roxadustat effectively and differentially suppressed the peak and late components of IK(DR) amplitude in response to membrane depolarization in pituitary tumor (GH3) cells with an IC50 value of 5.71 and 1.32 μM, respectively. The current inactivation of IK(DR) elicited by 10-sec membrane depolarization became raised in the presence of roxadustatt. When cells were exposed to either CoCl2 or deferoxamine (DFO), the IK(DR) elicited by membrane depolarization was not modified; however, nonactin, a K+-selective ionophore, in continued presence of roxadustat, attenuated roxadustat-mediated inhibition of the amplitude. The steady-state inactivation of IK(DR) could be constructed in the presence of roxadustat. Recovery of IK(DR) block by roxadustat (3 and 10 μM) could be fitted by a single exponential with 382 and 523 msec, respectively. The roxadustat addition slightly suppressed erg-mediated K+ or hyperpolarization-activated cation currents. This drug also decreased the peak amplitude of voltage-gated Na+ current with a slowing in inactivation rate of the current. Likewise, in H9c2 heart-derived cells, the addition of roxadustat suppressed IK(DR) amplitude in combination with the shortening in inactivation time course of the current. In high glucose-treated H9c2 cells, roxadustat-mediated inhibition of IK(DR) remained unchanged. Collectively, despite its suppression of HIF prolyl hydroxylase, inhibitory actions of roxadustat on different types of ionic currents possibly in a non-genomic fashion might provide another yet unidentified mechanism through which cellular functions are seriously perturbed, if similar findings occur in vivo.
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Affiliation(s)
- Wei-Ting Chang
- Division of Cardiovascular Medicine, Chi-Mei Medical Center, Tainan 71004 Taiwan;
- Department of Biotechnology, Southern Taiwan University of Science and Technology, Tainan 71004, Taiwan
- Institute of Clinical Medicine, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan
| | - Yi-Ching Lo
- Department of Pharmacology, College of Medicine, Kaohsiung Medical University, Kaohsiung 80708, Taiwan;
| | - Zi-Han Gao
- Department of Physiology, National Cheng Kung University Medical College, Tainan 70101, Taiwan;
| | - Sheng-Nan Wu
- Department of Physiology, National Cheng Kung University Medical College, Tainan 70101, Taiwan;
- Institute of Basic Medical Sciences, National Cheng Kung University Medical College, Tainan 70101, Taiwan
- Department of Basic Medical Sciences, China Medical University Hospital, Taichung 40402, Taiwan
- Correspondence: ; Tel.: +886-6-2353535-5334/886-6-2362780
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Abstract
Roxadustat (Ai Rui Zhuo® in China) is an orally administered, small molecule hypoxia-inducible factor (HIF) prolyl hydroxylase inhibitor that is being developed by FibroGen, in collaboration with Astellas and AstraZeneca, for the treatment of anaemia in patients with dialysis-dependent chronic kidney disease (CKD), non-dialysis-dependent CKD and in patients with myelodysplastic syndromes. The drug reversibly binds to and inhibits HIF-prolyl hydroxylase enzymes that are responsible for the degradation of transcription factors in the HIF family under normal oxygen conditions. Inhibition of these enzymes reduces HIF breakdown and promotes HIF activity, leading to an increase in endogenous erythropoietin production, thereby enhancing erythropoiesis. It also reduces the expression of the peptide hormone hepcidin, improves iron availability and increases haemoglobin levels. HIF regulates the expression of genes in response to reduced oxygen levels, including genes required for erythropoiesis and iron metabolism. Roxadustat is approved in China and is under regulatory review in Japan for the treatment of anaemia in patients with dialysis-dependent CKD. Studies are underway to investigate long-term cardiovascular outcomes with roxadustat versus placebo (for non-dialysis-dependent CKD) or standard of care (for dialysis-dependent CKD). This article summarizes the milestones in the development of roxadustat leading to this first approval.
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Affiliation(s)
- Sohita Dhillon
- Springer, Private Bag 65901, Mairangi Bay, 0754, Auckland, New Zealand.
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Sadaghianloo N, Contenti J, Dardik A, Mazure NM. Role of Hypoxia and Metabolism in the Development of Neointimal Hyperplasia in Arteriovenous Fistulas. Int J Mol Sci 2019; 20:ijms20215387. [PMID: 31671790 PMCID: PMC6862436 DOI: 10.3390/ijms20215387] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2019] [Revised: 10/24/2019] [Accepted: 10/25/2019] [Indexed: 12/11/2022] Open
Abstract
For patients with end-stage renal disease requiring hemodialysis, their vascular access is both their lifeline and their Achilles heel. Despite being recommended as primary vascular access, the arteriovenous fistula (AVF) shows sub-optimal results, with about 50% of patients needing a revision during the year following creation. After the AVF is created, the venous wall must adapt to new environment. While hemodynamic changes are responsible for the adaptation of the extracellular matrix and activation of the endothelium, surgical dissection and mobilization of the vein disrupt the vasa vasorum, causing wall ischemia and oxidative stress. As a consequence, migration and proliferation of vascular cells participate in venous wall thickening by a mechanism of neointimal hyperplasia (NH). When aggressive, NH causes stenosis and AVF dysfunction. In this review we show how hypoxia, metabolism, and flow parameters are intricate mechanisms responsible for the development of NH and stenosis during AVF maturation.
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Affiliation(s)
- Nirvana Sadaghianloo
- Centre de Méditerranéen de Médecine Moléculaire (C3M), Université Côte d'Azur, INSERM U1065, 151 Route de St Antoine de Ginestière, BP2 3194, 06204 Nice CEDEX 03, France.
- Department of Vascular Surgery, Centre Hospitalier Universitaire de Nice, 06000 Nice, France.
| | - Julie Contenti
- Centre de Méditerranéen de Médecine Moléculaire (C3M), Université Côte d'Azur, INSERM U1065, 151 Route de St Antoine de Ginestière, BP2 3194, 06204 Nice CEDEX 03, France.
- Department of Emergency Medicine, Centre Hospitalier Universitaire de Nice, 06000 Nice, France.
| | - Alan Dardik
- Department of Surgery and the Vascular Biology and Therapeutics Program, Yale University, New Haven, CT 06520, USA.
- Department of Surgery, VA Connecticut Healthcare Systems, West Haven, CT 06516, USA.
| | - Nathalie M Mazure
- Centre de Méditerranéen de Médecine Moléculaire (C3M), Université Côte d'Azur, INSERM U1065, 151 Route de St Antoine de Ginestière, BP2 3194, 06204 Nice CEDEX 03, France.
- Department of Vascular Surgery, Centre Hospitalier Universitaire de Nice, 06000 Nice, France.
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Anemia of Inflammation with An Emphasis on Chronic Kidney Disease. Nutrients 2019; 11:nu11102424. [PMID: 31614529 PMCID: PMC6835368 DOI: 10.3390/nu11102424] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 09/29/2019] [Accepted: 09/30/2019] [Indexed: 01/28/2023] Open
Abstract
Iron is vital for a vast variety of cellular processes and its homeostasis is strictly controlled and regulated. Nevertheless, disorders of iron metabolism are diverse and can be caused by insufficiency, overload or iron mal-distribution in tissues. Iron deficiency (ID) progresses to iron-deficiency anemia (IDA) after iron stores are depleted. Inflammation is of diverse etiology in anemia of chronic disease (ACD). It results in serum hypoferremia and tissue hyperferritinemia, which are caused by elevated serum hepcidin levels, and this underlies the onset of functional iron-deficiency anemia. Inflammation is also inhibitory to erythropoietin function and may directly increase hepcidin level, which influences iron metabolism. Consequently, immune responses orchestrate iron metabolism, aggravate iron sequestration and, ultimately, impair the processes of erythropoiesis. Hence, functional iron-deficiency anemia is a risk factor for several ailments, disorders and diseases. Therefore, therapeutic strategies depend on the symptoms, severity, comorbidities and the associated risk factors of anemia. Oral iron supplements can be employed to treat ID and mild anemia particularly, when gastrointestinal intolerance is minimal. Intravenous (IV) iron is the option in moderate and severe anemic conditions, for patients with compromised intestinal integrity, or when oral iron is refractory. Erythropoietin (EPO) is used to treat functional iron deficiency, and blood transfusion is restricted to refractory patients or in life-threatening emergency situations. Despite these interventions, many patients remain anemic and do not respond to conventional treatment approaches. However, various novel therapies are being developed to treat persistent anemia in patients.
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Chen N, Hao C, Peng X, Lin H, Yin A, Hao L, Tao Y, Liang X, Liu Z, Xing C, Chen J, Luo L, Zuo L, Liao Y, Liu BC, Leong R, Wang C, Liu C, Neff T, Szczech L, Yu KHP. Roxadustat for Anemia in Patients with Kidney Disease Not Receiving Dialysis. N Engl J Med 2019; 381:1001-1010. [PMID: 31340089 DOI: 10.1056/nejmoa1813599] [Citation(s) in RCA: 377] [Impact Index Per Article: 75.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
BACKGROUND Roxadustat (FG-4592) is an oral inhibitor of hypoxia-inducible factor (HIF) prolyl hydroxylase that stimulates erythropoiesis and regulates iron metabolism. In phase 2 studies involving patients with chronic kidney disease, roxadustat increased levels of endogenous erythropoietin to within or near the physiologic range, along with increasing hemoglobin levels and improving iron homeostasis. Additional data are needed regarding the efficacy and safety of roxadustat for the treatment of anemia in patients with chronic kidney disease who are not undergoing dialysis. METHODS In this phase 3 trial conducted at 29 sites in China, we randomly assigned 154 patients with chronic kidney disease in a 2:1 ratio to receive roxadustat or placebo three times a week for 8 weeks in a double-blind manner. All the patients had a hemoglobin level of 7.0 to 10.0 g per deciliter at baseline. The randomized phase of the trial was followed by an 18-week open-label period in which all the patients received roxadustat; parenteral iron was withheld. The primary end point was the mean change from baseline in the hemoglobin level, averaged over weeks 7 through 9. RESULTS During the primary-analysis period, the mean (±SD) change from baseline in the hemoglobin level was an increase of 1.9±1.2 g per deciliter in the roxadustat group and a decrease of 0.4±0.8 g per deciliter in the placebo group (P<0.001). The mean reduction from baseline in the hepcidin level (associated with greater iron availability) was 56.14±63.40 ng per milliliter in the roxadustat group and 15.10±48.06 ng per milliliter in the placebo group. The reduction from baseline in the total cholesterol level was 40.6 mg per deciliter in the roxadustat group and 7.7 mg per deciliter in the placebo group. Hyperkalemia and metabolic acidosis occurred more frequently in the roxadustat group than in the placebo group. The efficacy of roxadustat in hemoglobin correction and maintenance was maintained during the 18-week open-label period. CONCLUSIONS In Chinese patients with chronic kidney disease who were not undergoing dialysis, those in the roxadustat group had a higher mean hemoglobin level than those in the placebo group after 8 weeks. During the 18-week open-label phase of the trial, roxadustat was associated with continued efficacy. (Funded by FibroGen and FibroGen [China] Medical Technology Development; ClinicalTrials.gov number, NCT02652819.).
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Affiliation(s)
- Nan Chen
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), and the Division of Nephrology, Huashan Hospital Fudan University (C.H.), Shanghai, the Department of Nephrology, People's Hospital of Guangxi Zhuang Autonomous Region (X.P.), and the Department of Nephrology, First Affiliated Hospital of Guangxi Medical University (Y.L.), Nanning, the First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an (A.Y.), the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.), West China Hospital Sichuan University, Chengdu (Y.T.), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X.L.), and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Z.L.), Guangzhou, the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), Nanjing, First Affiliated Hospital of Zhejiang University, Hangzhou (J.C.), First Affiliated Hospital of Nanchang University, Nanchang (L.L.), and the Department of Nephrology, Peking University People's Hospital, Beijing (L.Z.) - all in China; and FibroGen, San Francisco (R.L., C.W., C.L., T.N., L.S., K.-H.P.Y.)
| | - Chuanming Hao
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), and the Division of Nephrology, Huashan Hospital Fudan University (C.H.), Shanghai, the Department of Nephrology, People's Hospital of Guangxi Zhuang Autonomous Region (X.P.), and the Department of Nephrology, First Affiliated Hospital of Guangxi Medical University (Y.L.), Nanning, the First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an (A.Y.), the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.), West China Hospital Sichuan University, Chengdu (Y.T.), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X.L.), and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Z.L.), Guangzhou, the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), Nanjing, First Affiliated Hospital of Zhejiang University, Hangzhou (J.C.), First Affiliated Hospital of Nanchang University, Nanchang (L.L.), and the Department of Nephrology, Peking University People's Hospital, Beijing (L.Z.) - all in China; and FibroGen, San Francisco (R.L., C.W., C.L., T.N., L.S., K.-H.P.Y.)
| | - Xiaomei Peng
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), and the Division of Nephrology, Huashan Hospital Fudan University (C.H.), Shanghai, the Department of Nephrology, People's Hospital of Guangxi Zhuang Autonomous Region (X.P.), and the Department of Nephrology, First Affiliated Hospital of Guangxi Medical University (Y.L.), Nanning, the First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an (A.Y.), the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.), West China Hospital Sichuan University, Chengdu (Y.T.), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X.L.), and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Z.L.), Guangzhou, the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), Nanjing, First Affiliated Hospital of Zhejiang University, Hangzhou (J.C.), First Affiliated Hospital of Nanchang University, Nanchang (L.L.), and the Department of Nephrology, Peking University People's Hospital, Beijing (L.Z.) - all in China; and FibroGen, San Francisco (R.L., C.W., C.L., T.N., L.S., K.-H.P.Y.)
| | - Hongli Lin
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), and the Division of Nephrology, Huashan Hospital Fudan University (C.H.), Shanghai, the Department of Nephrology, People's Hospital of Guangxi Zhuang Autonomous Region (X.P.), and the Department of Nephrology, First Affiliated Hospital of Guangxi Medical University (Y.L.), Nanning, the First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an (A.Y.), the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.), West China Hospital Sichuan University, Chengdu (Y.T.), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X.L.), and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Z.L.), Guangzhou, the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), Nanjing, First Affiliated Hospital of Zhejiang University, Hangzhou (J.C.), First Affiliated Hospital of Nanchang University, Nanchang (L.L.), and the Department of Nephrology, Peking University People's Hospital, Beijing (L.Z.) - all in China; and FibroGen, San Francisco (R.L., C.W., C.L., T.N., L.S., K.-H.P.Y.)
| | - Aiping Yin
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), and the Division of Nephrology, Huashan Hospital Fudan University (C.H.), Shanghai, the Department of Nephrology, People's Hospital of Guangxi Zhuang Autonomous Region (X.P.), and the Department of Nephrology, First Affiliated Hospital of Guangxi Medical University (Y.L.), Nanning, the First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an (A.Y.), the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.), West China Hospital Sichuan University, Chengdu (Y.T.), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X.L.), and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Z.L.), Guangzhou, the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), Nanjing, First Affiliated Hospital of Zhejiang University, Hangzhou (J.C.), First Affiliated Hospital of Nanchang University, Nanchang (L.L.), and the Department of Nephrology, Peking University People's Hospital, Beijing (L.Z.) - all in China; and FibroGen, San Francisco (R.L., C.W., C.L., T.N., L.S., K.-H.P.Y.)
| | - Li Hao
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), and the Division of Nephrology, Huashan Hospital Fudan University (C.H.), Shanghai, the Department of Nephrology, People's Hospital of Guangxi Zhuang Autonomous Region (X.P.), and the Department of Nephrology, First Affiliated Hospital of Guangxi Medical University (Y.L.), Nanning, the First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an (A.Y.), the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.), West China Hospital Sichuan University, Chengdu (Y.T.), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X.L.), and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Z.L.), Guangzhou, the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), Nanjing, First Affiliated Hospital of Zhejiang University, Hangzhou (J.C.), First Affiliated Hospital of Nanchang University, Nanchang (L.L.), and the Department of Nephrology, Peking University People's Hospital, Beijing (L.Z.) - all in China; and FibroGen, San Francisco (R.L., C.W., C.L., T.N., L.S., K.-H.P.Y.)
| | - Ye Tao
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), and the Division of Nephrology, Huashan Hospital Fudan University (C.H.), Shanghai, the Department of Nephrology, People's Hospital of Guangxi Zhuang Autonomous Region (X.P.), and the Department of Nephrology, First Affiliated Hospital of Guangxi Medical University (Y.L.), Nanning, the First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an (A.Y.), the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.), West China Hospital Sichuan University, Chengdu (Y.T.), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X.L.), and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Z.L.), Guangzhou, the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), Nanjing, First Affiliated Hospital of Zhejiang University, Hangzhou (J.C.), First Affiliated Hospital of Nanchang University, Nanchang (L.L.), and the Department of Nephrology, Peking University People's Hospital, Beijing (L.Z.) - all in China; and FibroGen, San Francisco (R.L., C.W., C.L., T.N., L.S., K.-H.P.Y.)
| | - Xinling Liang
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), and the Division of Nephrology, Huashan Hospital Fudan University (C.H.), Shanghai, the Department of Nephrology, People's Hospital of Guangxi Zhuang Autonomous Region (X.P.), and the Department of Nephrology, First Affiliated Hospital of Guangxi Medical University (Y.L.), Nanning, the First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an (A.Y.), the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.), West China Hospital Sichuan University, Chengdu (Y.T.), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X.L.), and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Z.L.), Guangzhou, the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), Nanjing, First Affiliated Hospital of Zhejiang University, Hangzhou (J.C.), First Affiliated Hospital of Nanchang University, Nanchang (L.L.), and the Department of Nephrology, Peking University People's Hospital, Beijing (L.Z.) - all in China; and FibroGen, San Francisco (R.L., C.W., C.L., T.N., L.S., K.-H.P.Y.)
| | - Zhengrong Liu
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), and the Division of Nephrology, Huashan Hospital Fudan University (C.H.), Shanghai, the Department of Nephrology, People's Hospital of Guangxi Zhuang Autonomous Region (X.P.), and the Department of Nephrology, First Affiliated Hospital of Guangxi Medical University (Y.L.), Nanning, the First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an (A.Y.), the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.), West China Hospital Sichuan University, Chengdu (Y.T.), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X.L.), and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Z.L.), Guangzhou, the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), Nanjing, First Affiliated Hospital of Zhejiang University, Hangzhou (J.C.), First Affiliated Hospital of Nanchang University, Nanchang (L.L.), and the Department of Nephrology, Peking University People's Hospital, Beijing (L.Z.) - all in China; and FibroGen, San Francisco (R.L., C.W., C.L., T.N., L.S., K.-H.P.Y.)
| | - Changying Xing
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), and the Division of Nephrology, Huashan Hospital Fudan University (C.H.), Shanghai, the Department of Nephrology, People's Hospital of Guangxi Zhuang Autonomous Region (X.P.), and the Department of Nephrology, First Affiliated Hospital of Guangxi Medical University (Y.L.), Nanning, the First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an (A.Y.), the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.), West China Hospital Sichuan University, Chengdu (Y.T.), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X.L.), and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Z.L.), Guangzhou, the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), Nanjing, First Affiliated Hospital of Zhejiang University, Hangzhou (J.C.), First Affiliated Hospital of Nanchang University, Nanchang (L.L.), and the Department of Nephrology, Peking University People's Hospital, Beijing (L.Z.) - all in China; and FibroGen, San Francisco (R.L., C.W., C.L., T.N., L.S., K.-H.P.Y.)
| | - Jianghua Chen
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), and the Division of Nephrology, Huashan Hospital Fudan University (C.H.), Shanghai, the Department of Nephrology, People's Hospital of Guangxi Zhuang Autonomous Region (X.P.), and the Department of Nephrology, First Affiliated Hospital of Guangxi Medical University (Y.L.), Nanning, the First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an (A.Y.), the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.), West China Hospital Sichuan University, Chengdu (Y.T.), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X.L.), and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Z.L.), Guangzhou, the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), Nanjing, First Affiliated Hospital of Zhejiang University, Hangzhou (J.C.), First Affiliated Hospital of Nanchang University, Nanchang (L.L.), and the Department of Nephrology, Peking University People's Hospital, Beijing (L.Z.) - all in China; and FibroGen, San Francisco (R.L., C.W., C.L., T.N., L.S., K.-H.P.Y.)
| | - Laimin Luo
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), and the Division of Nephrology, Huashan Hospital Fudan University (C.H.), Shanghai, the Department of Nephrology, People's Hospital of Guangxi Zhuang Autonomous Region (X.P.), and the Department of Nephrology, First Affiliated Hospital of Guangxi Medical University (Y.L.), Nanning, the First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an (A.Y.), the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.), West China Hospital Sichuan University, Chengdu (Y.T.), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X.L.), and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Z.L.), Guangzhou, the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), Nanjing, First Affiliated Hospital of Zhejiang University, Hangzhou (J.C.), First Affiliated Hospital of Nanchang University, Nanchang (L.L.), and the Department of Nephrology, Peking University People's Hospital, Beijing (L.Z.) - all in China; and FibroGen, San Francisco (R.L., C.W., C.L., T.N., L.S., K.-H.P.Y.)
| | - Li Zuo
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), and the Division of Nephrology, Huashan Hospital Fudan University (C.H.), Shanghai, the Department of Nephrology, People's Hospital of Guangxi Zhuang Autonomous Region (X.P.), and the Department of Nephrology, First Affiliated Hospital of Guangxi Medical University (Y.L.), Nanning, the First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an (A.Y.), the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.), West China Hospital Sichuan University, Chengdu (Y.T.), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X.L.), and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Z.L.), Guangzhou, the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), Nanjing, First Affiliated Hospital of Zhejiang University, Hangzhou (J.C.), First Affiliated Hospital of Nanchang University, Nanchang (L.L.), and the Department of Nephrology, Peking University People's Hospital, Beijing (L.Z.) - all in China; and FibroGen, San Francisco (R.L., C.W., C.L., T.N., L.S., K.-H.P.Y.)
| | - Yunhua Liao
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), and the Division of Nephrology, Huashan Hospital Fudan University (C.H.), Shanghai, the Department of Nephrology, People's Hospital of Guangxi Zhuang Autonomous Region (X.P.), and the Department of Nephrology, First Affiliated Hospital of Guangxi Medical University (Y.L.), Nanning, the First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an (A.Y.), the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.), West China Hospital Sichuan University, Chengdu (Y.T.), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X.L.), and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Z.L.), Guangzhou, the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), Nanjing, First Affiliated Hospital of Zhejiang University, Hangzhou (J.C.), First Affiliated Hospital of Nanchang University, Nanchang (L.L.), and the Department of Nephrology, Peking University People's Hospital, Beijing (L.Z.) - all in China; and FibroGen, San Francisco (R.L., C.W., C.L., T.N., L.S., K.-H.P.Y.)
| | - Bi-Cheng Liu
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), and the Division of Nephrology, Huashan Hospital Fudan University (C.H.), Shanghai, the Department of Nephrology, People's Hospital of Guangxi Zhuang Autonomous Region (X.P.), and the Department of Nephrology, First Affiliated Hospital of Guangxi Medical University (Y.L.), Nanning, the First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an (A.Y.), the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.), West China Hospital Sichuan University, Chengdu (Y.T.), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X.L.), and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Z.L.), Guangzhou, the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), Nanjing, First Affiliated Hospital of Zhejiang University, Hangzhou (J.C.), First Affiliated Hospital of Nanchang University, Nanchang (L.L.), and the Department of Nephrology, Peking University People's Hospital, Beijing (L.Z.) - all in China; and FibroGen, San Francisco (R.L., C.W., C.L., T.N., L.S., K.-H.P.Y.)
| | - Robert Leong
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), and the Division of Nephrology, Huashan Hospital Fudan University (C.H.), Shanghai, the Department of Nephrology, People's Hospital of Guangxi Zhuang Autonomous Region (X.P.), and the Department of Nephrology, First Affiliated Hospital of Guangxi Medical University (Y.L.), Nanning, the First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an (A.Y.), the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.), West China Hospital Sichuan University, Chengdu (Y.T.), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X.L.), and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Z.L.), Guangzhou, the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), Nanjing, First Affiliated Hospital of Zhejiang University, Hangzhou (J.C.), First Affiliated Hospital of Nanchang University, Nanchang (L.L.), and the Department of Nephrology, Peking University People's Hospital, Beijing (L.Z.) - all in China; and FibroGen, San Francisco (R.L., C.W., C.L., T.N., L.S., K.-H.P.Y.)
| | - Chunrong Wang
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), and the Division of Nephrology, Huashan Hospital Fudan University (C.H.), Shanghai, the Department of Nephrology, People's Hospital of Guangxi Zhuang Autonomous Region (X.P.), and the Department of Nephrology, First Affiliated Hospital of Guangxi Medical University (Y.L.), Nanning, the First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an (A.Y.), the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.), West China Hospital Sichuan University, Chengdu (Y.T.), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X.L.), and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Z.L.), Guangzhou, the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), Nanjing, First Affiliated Hospital of Zhejiang University, Hangzhou (J.C.), First Affiliated Hospital of Nanchang University, Nanchang (L.L.), and the Department of Nephrology, Peking University People's Hospital, Beijing (L.Z.) - all in China; and FibroGen, San Francisco (R.L., C.W., C.L., T.N., L.S., K.-H.P.Y.)
| | - Cameron Liu
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), and the Division of Nephrology, Huashan Hospital Fudan University (C.H.), Shanghai, the Department of Nephrology, People's Hospital of Guangxi Zhuang Autonomous Region (X.P.), and the Department of Nephrology, First Affiliated Hospital of Guangxi Medical University (Y.L.), Nanning, the First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an (A.Y.), the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.), West China Hospital Sichuan University, Chengdu (Y.T.), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X.L.), and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Z.L.), Guangzhou, the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), Nanjing, First Affiliated Hospital of Zhejiang University, Hangzhou (J.C.), First Affiliated Hospital of Nanchang University, Nanchang (L.L.), and the Department of Nephrology, Peking University People's Hospital, Beijing (L.Z.) - all in China; and FibroGen, San Francisco (R.L., C.W., C.L., T.N., L.S., K.-H.P.Y.)
| | - Thomas Neff
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), and the Division of Nephrology, Huashan Hospital Fudan University (C.H.), Shanghai, the Department of Nephrology, People's Hospital of Guangxi Zhuang Autonomous Region (X.P.), and the Department of Nephrology, First Affiliated Hospital of Guangxi Medical University (Y.L.), Nanning, the First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an (A.Y.), the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.), West China Hospital Sichuan University, Chengdu (Y.T.), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X.L.), and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Z.L.), Guangzhou, the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), Nanjing, First Affiliated Hospital of Zhejiang University, Hangzhou (J.C.), First Affiliated Hospital of Nanchang University, Nanchang (L.L.), and the Department of Nephrology, Peking University People's Hospital, Beijing (L.Z.) - all in China; and FibroGen, San Francisco (R.L., C.W., C.L., T.N., L.S., K.-H.P.Y.)
| | - Lynda Szczech
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), and the Division of Nephrology, Huashan Hospital Fudan University (C.H.), Shanghai, the Department of Nephrology, People's Hospital of Guangxi Zhuang Autonomous Region (X.P.), and the Department of Nephrology, First Affiliated Hospital of Guangxi Medical University (Y.L.), Nanning, the First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an (A.Y.), the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.), West China Hospital Sichuan University, Chengdu (Y.T.), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X.L.), and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Z.L.), Guangzhou, the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), Nanjing, First Affiliated Hospital of Zhejiang University, Hangzhou (J.C.), First Affiliated Hospital of Nanchang University, Nanchang (L.L.), and the Department of Nephrology, Peking University People's Hospital, Beijing (L.Z.) - all in China; and FibroGen, San Francisco (R.L., C.W., C.L., T.N., L.S., K.-H.P.Y.)
| | - Kin-Hung P Yu
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), and the Division of Nephrology, Huashan Hospital Fudan University (C.H.), Shanghai, the Department of Nephrology, People's Hospital of Guangxi Zhuang Autonomous Region (X.P.), and the Department of Nephrology, First Affiliated Hospital of Guangxi Medical University (Y.L.), Nanning, the First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an (A.Y.), the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.), West China Hospital Sichuan University, Chengdu (Y.T.), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X.L.), and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Z.L.), Guangzhou, the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), Nanjing, First Affiliated Hospital of Zhejiang University, Hangzhou (J.C.), First Affiliated Hospital of Nanchang University, Nanchang (L.L.), and the Department of Nephrology, Peking University People's Hospital, Beijing (L.Z.) - all in China; and FibroGen, San Francisco (R.L., C.W., C.L., T.N., L.S., K.-H.P.Y.)
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Chen N, Hao C, Liu BC, Lin H, Wang C, Xing C, Liang X, Jiang G, Liu Z, Li X, Zuo L, Luo L, Wang J, Zhao MH, Liu Z, Cai GY, Hao L, Leong R, Wang C, Liu C, Neff T, Szczech L, Yu KHP. Roxadustat Treatment for Anemia in Patients Undergoing Long-Term Dialysis. N Engl J Med 2019; 381:1011-1022. [PMID: 31340116 DOI: 10.1056/nejmoa1901713] [Citation(s) in RCA: 385] [Impact Index Per Article: 77.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
BACKGROUND Roxadustat is an oral hypoxia-inducible factor prolyl hydroxylase inhibitor that stimulates erythropoiesis and regulates iron metabolism. Additional data are needed regarding the effectiveness and safety of roxadustat as compared with standard therapy (epoetin alfa) for the treatment of anemia in patients undergoing dialysis. METHODS In a trial conducted in China, we randomly assigned (in a 2:1 ratio) patients who had been undergoing dialysis and erythropoiesis-stimulating agent therapy with epoetin alfa for at least 6 weeks to receive roxadustat or epoetin alfa three times per week for 26 weeks. Parenteral iron was withheld except as rescue therapy. The primary end point was the mean change in hemoglobin level from baseline to the average level during weeks 23 through 27. Noninferiority of roxadustat would be established if the lower boundary of the two-sided 95% confidence interval for the difference between the values in the roxadustat group and epoetin alfa group was greater than or equal to -1.0 g per deciliter. Patients in each group had doses adjusted to reach a hemoglobin level of 10.0 to 12.0 g per deciliter. Safety was assessed by analysis of adverse events and clinical laboratory values. RESULTS A total of 305 patients underwent randomization (204 in the roxadustat group and 101 in the epoetin alfa group), and 256 patients (162 and 94, respectively) completed the 26-week treatment period. The mean baseline hemoglobin level was 10.4 g per deciliter. Roxadustat led to a numerically greater mean (±SD) change in hemoglobin level from baseline to weeks 23 through 27 (0.7±1.1 g per deciliter) than epoetin alfa (0.5±1.0 g per deciliter) and was statistically noninferior (difference, 0.2±1.2 g per deciliter; 95% confidence interval [CI], -0.02 to 0.5). As compared with epoetin alfa, roxadustat increased the transferrin level (difference, 0.43 g per liter; 95% CI, 0.32 to 0.53), maintained the serum iron level (difference, 25 μg per deciliter; 95% CI, 17 to 33), and attenuated decreases in the transferrin saturation (difference, 4.2 percentage points; 95% CI, 1.5 to 6.9). At week 27, the decrease in total cholesterol was greater with roxadustat than with epoetin alfa (difference, -22 mg per deciliter; 95% CI, -29 to -16), as was the decrease in low-density lipoprotein cholesterol (difference, -18 mg per deciliter; 95% CI, -23 to -13). Roxadustat was associated with a mean reduction in hepcidin of 30.2 ng per milliliter (95% CI, -64.8 to -13.6), as compared with 2.3 ng per milliliter (95% CI, -51.6 to 6.2) in the epoetin alfa group. Hyperkalemia and upper respiratory infection occurred at a higher frequency in the roxadustat group, and hypertension occurred at a higher frequency in the epoetin alfa group. CONCLUSIONS Oral roxadustat was noninferior to parenteral epoetin alfa as therapy for anemia in Chinese patients undergoing dialysis. (Funded by FibroGen and FibroGen [China] Medical Technology Development; ClinicalTrials.gov number, NCT02652806.).
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Affiliation(s)
- Nan Chen
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), the Division of Nephrology, Huashan Hospital Fudan University (C.H.), and the Department of Nephrology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (G.J.), Shanghai, the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing University School of Medicine (Zhihong Liu), Nanjing, First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Baotou Medical College of Inner Mongolia University of Science and Technology, Baotou (Caili Wang), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X. Liang) and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Zhengrong Liu), Guangzhou, the Department of Nephrology, Chinese Academy of Medical Sciences, Peking Union Medical College Hospital (X. Li), the Department of Nephrology, Peking University People's Hospital (L.Z.), the Renal Division, Department of Medicine, Peking University First Hospital and Institute of Nephrology, Peking University (M.Z.), and the Department of Nephrology, Chinese People's Liberation Army General Hospital, State Key Lab of Kidney Disease, National Clinical Research Center for Kidney Disease (G.-Y.C.), Beijing, the First Affiliated Hospital of Nanchang University, Nanchang (L.L.), the Department of Nephrology, Lanzhou University Second Hospital, Lanzhou (J.W.), and the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.) - all in China; and FibroGen, San Francisco (R.L., Chunrong Wang, C.L., T.N., L.S., K.-H.P.Y.)
| | - Chuanming Hao
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), the Division of Nephrology, Huashan Hospital Fudan University (C.H.), and the Department of Nephrology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (G.J.), Shanghai, the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing University School of Medicine (Zhihong Liu), Nanjing, First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Baotou Medical College of Inner Mongolia University of Science and Technology, Baotou (Caili Wang), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X. Liang) and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Zhengrong Liu), Guangzhou, the Department of Nephrology, Chinese Academy of Medical Sciences, Peking Union Medical College Hospital (X. Li), the Department of Nephrology, Peking University People's Hospital (L.Z.), the Renal Division, Department of Medicine, Peking University First Hospital and Institute of Nephrology, Peking University (M.Z.), and the Department of Nephrology, Chinese People's Liberation Army General Hospital, State Key Lab of Kidney Disease, National Clinical Research Center for Kidney Disease (G.-Y.C.), Beijing, the First Affiliated Hospital of Nanchang University, Nanchang (L.L.), the Department of Nephrology, Lanzhou University Second Hospital, Lanzhou (J.W.), and the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.) - all in China; and FibroGen, San Francisco (R.L., Chunrong Wang, C.L., T.N., L.S., K.-H.P.Y.)
| | - Bi-Cheng Liu
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), the Division of Nephrology, Huashan Hospital Fudan University (C.H.), and the Department of Nephrology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (G.J.), Shanghai, the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing University School of Medicine (Zhihong Liu), Nanjing, First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Baotou Medical College of Inner Mongolia University of Science and Technology, Baotou (Caili Wang), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X. Liang) and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Zhengrong Liu), Guangzhou, the Department of Nephrology, Chinese Academy of Medical Sciences, Peking Union Medical College Hospital (X. Li), the Department of Nephrology, Peking University People's Hospital (L.Z.), the Renal Division, Department of Medicine, Peking University First Hospital and Institute of Nephrology, Peking University (M.Z.), and the Department of Nephrology, Chinese People's Liberation Army General Hospital, State Key Lab of Kidney Disease, National Clinical Research Center for Kidney Disease (G.-Y.C.), Beijing, the First Affiliated Hospital of Nanchang University, Nanchang (L.L.), the Department of Nephrology, Lanzhou University Second Hospital, Lanzhou (J.W.), and the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.) - all in China; and FibroGen, San Francisco (R.L., Chunrong Wang, C.L., T.N., L.S., K.-H.P.Y.)
| | - Hongli Lin
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), the Division of Nephrology, Huashan Hospital Fudan University (C.H.), and the Department of Nephrology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (G.J.), Shanghai, the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing University School of Medicine (Zhihong Liu), Nanjing, First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Baotou Medical College of Inner Mongolia University of Science and Technology, Baotou (Caili Wang), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X. Liang) and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Zhengrong Liu), Guangzhou, the Department of Nephrology, Chinese Academy of Medical Sciences, Peking Union Medical College Hospital (X. Li), the Department of Nephrology, Peking University People's Hospital (L.Z.), the Renal Division, Department of Medicine, Peking University First Hospital and Institute of Nephrology, Peking University (M.Z.), and the Department of Nephrology, Chinese People's Liberation Army General Hospital, State Key Lab of Kidney Disease, National Clinical Research Center for Kidney Disease (G.-Y.C.), Beijing, the First Affiliated Hospital of Nanchang University, Nanchang (L.L.), the Department of Nephrology, Lanzhou University Second Hospital, Lanzhou (J.W.), and the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.) - all in China; and FibroGen, San Francisco (R.L., Chunrong Wang, C.L., T.N., L.S., K.-H.P.Y.)
| | - Caili Wang
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), the Division of Nephrology, Huashan Hospital Fudan University (C.H.), and the Department of Nephrology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (G.J.), Shanghai, the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing University School of Medicine (Zhihong Liu), Nanjing, First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Baotou Medical College of Inner Mongolia University of Science and Technology, Baotou (Caili Wang), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X. Liang) and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Zhengrong Liu), Guangzhou, the Department of Nephrology, Chinese Academy of Medical Sciences, Peking Union Medical College Hospital (X. Li), the Department of Nephrology, Peking University People's Hospital (L.Z.), the Renal Division, Department of Medicine, Peking University First Hospital and Institute of Nephrology, Peking University (M.Z.), and the Department of Nephrology, Chinese People's Liberation Army General Hospital, State Key Lab of Kidney Disease, National Clinical Research Center for Kidney Disease (G.-Y.C.), Beijing, the First Affiliated Hospital of Nanchang University, Nanchang (L.L.), the Department of Nephrology, Lanzhou University Second Hospital, Lanzhou (J.W.), and the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.) - all in China; and FibroGen, San Francisco (R.L., Chunrong Wang, C.L., T.N., L.S., K.-H.P.Y.)
| | - Changying Xing
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), the Division of Nephrology, Huashan Hospital Fudan University (C.H.), and the Department of Nephrology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (G.J.), Shanghai, the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing University School of Medicine (Zhihong Liu), Nanjing, First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Baotou Medical College of Inner Mongolia University of Science and Technology, Baotou (Caili Wang), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X. Liang) and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Zhengrong Liu), Guangzhou, the Department of Nephrology, Chinese Academy of Medical Sciences, Peking Union Medical College Hospital (X. Li), the Department of Nephrology, Peking University People's Hospital (L.Z.), the Renal Division, Department of Medicine, Peking University First Hospital and Institute of Nephrology, Peking University (M.Z.), and the Department of Nephrology, Chinese People's Liberation Army General Hospital, State Key Lab of Kidney Disease, National Clinical Research Center for Kidney Disease (G.-Y.C.), Beijing, the First Affiliated Hospital of Nanchang University, Nanchang (L.L.), the Department of Nephrology, Lanzhou University Second Hospital, Lanzhou (J.W.), and the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.) - all in China; and FibroGen, San Francisco (R.L., Chunrong Wang, C.L., T.N., L.S., K.-H.P.Y.)
| | - Xinling Liang
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), the Division of Nephrology, Huashan Hospital Fudan University (C.H.), and the Department of Nephrology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (G.J.), Shanghai, the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing University School of Medicine (Zhihong Liu), Nanjing, First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Baotou Medical College of Inner Mongolia University of Science and Technology, Baotou (Caili Wang), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X. Liang) and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Zhengrong Liu), Guangzhou, the Department of Nephrology, Chinese Academy of Medical Sciences, Peking Union Medical College Hospital (X. Li), the Department of Nephrology, Peking University People's Hospital (L.Z.), the Renal Division, Department of Medicine, Peking University First Hospital and Institute of Nephrology, Peking University (M.Z.), and the Department of Nephrology, Chinese People's Liberation Army General Hospital, State Key Lab of Kidney Disease, National Clinical Research Center for Kidney Disease (G.-Y.C.), Beijing, the First Affiliated Hospital of Nanchang University, Nanchang (L.L.), the Department of Nephrology, Lanzhou University Second Hospital, Lanzhou (J.W.), and the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.) - all in China; and FibroGen, San Francisco (R.L., Chunrong Wang, C.L., T.N., L.S., K.-H.P.Y.)
| | - Gengru Jiang
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), the Division of Nephrology, Huashan Hospital Fudan University (C.H.), and the Department of Nephrology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (G.J.), Shanghai, the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing University School of Medicine (Zhihong Liu), Nanjing, First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Baotou Medical College of Inner Mongolia University of Science and Technology, Baotou (Caili Wang), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X. Liang) and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Zhengrong Liu), Guangzhou, the Department of Nephrology, Chinese Academy of Medical Sciences, Peking Union Medical College Hospital (X. Li), the Department of Nephrology, Peking University People's Hospital (L.Z.), the Renal Division, Department of Medicine, Peking University First Hospital and Institute of Nephrology, Peking University (M.Z.), and the Department of Nephrology, Chinese People's Liberation Army General Hospital, State Key Lab of Kidney Disease, National Clinical Research Center for Kidney Disease (G.-Y.C.), Beijing, the First Affiliated Hospital of Nanchang University, Nanchang (L.L.), the Department of Nephrology, Lanzhou University Second Hospital, Lanzhou (J.W.), and the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.) - all in China; and FibroGen, San Francisco (R.L., Chunrong Wang, C.L., T.N., L.S., K.-H.P.Y.)
| | - Zhengrong Liu
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), the Division of Nephrology, Huashan Hospital Fudan University (C.H.), and the Department of Nephrology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (G.J.), Shanghai, the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing University School of Medicine (Zhihong Liu), Nanjing, First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Baotou Medical College of Inner Mongolia University of Science and Technology, Baotou (Caili Wang), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X. Liang) and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Zhengrong Liu), Guangzhou, the Department of Nephrology, Chinese Academy of Medical Sciences, Peking Union Medical College Hospital (X. Li), the Department of Nephrology, Peking University People's Hospital (L.Z.), the Renal Division, Department of Medicine, Peking University First Hospital and Institute of Nephrology, Peking University (M.Z.), and the Department of Nephrology, Chinese People's Liberation Army General Hospital, State Key Lab of Kidney Disease, National Clinical Research Center for Kidney Disease (G.-Y.C.), Beijing, the First Affiliated Hospital of Nanchang University, Nanchang (L.L.), the Department of Nephrology, Lanzhou University Second Hospital, Lanzhou (J.W.), and the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.) - all in China; and FibroGen, San Francisco (R.L., Chunrong Wang, C.L., T.N., L.S., K.-H.P.Y.)
| | - Xuemei Li
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), the Division of Nephrology, Huashan Hospital Fudan University (C.H.), and the Department of Nephrology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (G.J.), Shanghai, the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing University School of Medicine (Zhihong Liu), Nanjing, First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Baotou Medical College of Inner Mongolia University of Science and Technology, Baotou (Caili Wang), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X. Liang) and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Zhengrong Liu), Guangzhou, the Department of Nephrology, Chinese Academy of Medical Sciences, Peking Union Medical College Hospital (X. Li), the Department of Nephrology, Peking University People's Hospital (L.Z.), the Renal Division, Department of Medicine, Peking University First Hospital and Institute of Nephrology, Peking University (M.Z.), and the Department of Nephrology, Chinese People's Liberation Army General Hospital, State Key Lab of Kidney Disease, National Clinical Research Center for Kidney Disease (G.-Y.C.), Beijing, the First Affiliated Hospital of Nanchang University, Nanchang (L.L.), the Department of Nephrology, Lanzhou University Second Hospital, Lanzhou (J.W.), and the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.) - all in China; and FibroGen, San Francisco (R.L., Chunrong Wang, C.L., T.N., L.S., K.-H.P.Y.)
| | - Li Zuo
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), the Division of Nephrology, Huashan Hospital Fudan University (C.H.), and the Department of Nephrology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (G.J.), Shanghai, the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing University School of Medicine (Zhihong Liu), Nanjing, First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Baotou Medical College of Inner Mongolia University of Science and Technology, Baotou (Caili Wang), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X. Liang) and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Zhengrong Liu), Guangzhou, the Department of Nephrology, Chinese Academy of Medical Sciences, Peking Union Medical College Hospital (X. Li), the Department of Nephrology, Peking University People's Hospital (L.Z.), the Renal Division, Department of Medicine, Peking University First Hospital and Institute of Nephrology, Peking University (M.Z.), and the Department of Nephrology, Chinese People's Liberation Army General Hospital, State Key Lab of Kidney Disease, National Clinical Research Center for Kidney Disease (G.-Y.C.), Beijing, the First Affiliated Hospital of Nanchang University, Nanchang (L.L.), the Department of Nephrology, Lanzhou University Second Hospital, Lanzhou (J.W.), and the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.) - all in China; and FibroGen, San Francisco (R.L., Chunrong Wang, C.L., T.N., L.S., K.-H.P.Y.)
| | - Laimin Luo
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), the Division of Nephrology, Huashan Hospital Fudan University (C.H.), and the Department of Nephrology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (G.J.), Shanghai, the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing University School of Medicine (Zhihong Liu), Nanjing, First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Baotou Medical College of Inner Mongolia University of Science and Technology, Baotou (Caili Wang), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X. Liang) and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Zhengrong Liu), Guangzhou, the Department of Nephrology, Chinese Academy of Medical Sciences, Peking Union Medical College Hospital (X. Li), the Department of Nephrology, Peking University People's Hospital (L.Z.), the Renal Division, Department of Medicine, Peking University First Hospital and Institute of Nephrology, Peking University (M.Z.), and the Department of Nephrology, Chinese People's Liberation Army General Hospital, State Key Lab of Kidney Disease, National Clinical Research Center for Kidney Disease (G.-Y.C.), Beijing, the First Affiliated Hospital of Nanchang University, Nanchang (L.L.), the Department of Nephrology, Lanzhou University Second Hospital, Lanzhou (J.W.), and the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.) - all in China; and FibroGen, San Francisco (R.L., Chunrong Wang, C.L., T.N., L.S., K.-H.P.Y.)
| | - Jianqin Wang
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), the Division of Nephrology, Huashan Hospital Fudan University (C.H.), and the Department of Nephrology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (G.J.), Shanghai, the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing University School of Medicine (Zhihong Liu), Nanjing, First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Baotou Medical College of Inner Mongolia University of Science and Technology, Baotou (Caili Wang), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X. Liang) and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Zhengrong Liu), Guangzhou, the Department of Nephrology, Chinese Academy of Medical Sciences, Peking Union Medical College Hospital (X. Li), the Department of Nephrology, Peking University People's Hospital (L.Z.), the Renal Division, Department of Medicine, Peking University First Hospital and Institute of Nephrology, Peking University (M.Z.), and the Department of Nephrology, Chinese People's Liberation Army General Hospital, State Key Lab of Kidney Disease, National Clinical Research Center for Kidney Disease (G.-Y.C.), Beijing, the First Affiliated Hospital of Nanchang University, Nanchang (L.L.), the Department of Nephrology, Lanzhou University Second Hospital, Lanzhou (J.W.), and the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.) - all in China; and FibroGen, San Francisco (R.L., Chunrong Wang, C.L., T.N., L.S., K.-H.P.Y.)
| | - Ming-Hui Zhao
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), the Division of Nephrology, Huashan Hospital Fudan University (C.H.), and the Department of Nephrology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (G.J.), Shanghai, the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing University School of Medicine (Zhihong Liu), Nanjing, First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Baotou Medical College of Inner Mongolia University of Science and Technology, Baotou (Caili Wang), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X. Liang) and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Zhengrong Liu), Guangzhou, the Department of Nephrology, Chinese Academy of Medical Sciences, Peking Union Medical College Hospital (X. Li), the Department of Nephrology, Peking University People's Hospital (L.Z.), the Renal Division, Department of Medicine, Peking University First Hospital and Institute of Nephrology, Peking University (M.Z.), and the Department of Nephrology, Chinese People's Liberation Army General Hospital, State Key Lab of Kidney Disease, National Clinical Research Center for Kidney Disease (G.-Y.C.), Beijing, the First Affiliated Hospital of Nanchang University, Nanchang (L.L.), the Department of Nephrology, Lanzhou University Second Hospital, Lanzhou (J.W.), and the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.) - all in China; and FibroGen, San Francisco (R.L., Chunrong Wang, C.L., T.N., L.S., K.-H.P.Y.)
| | - Zhihong Liu
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), the Division of Nephrology, Huashan Hospital Fudan University (C.H.), and the Department of Nephrology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (G.J.), Shanghai, the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing University School of Medicine (Zhihong Liu), Nanjing, First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Baotou Medical College of Inner Mongolia University of Science and Technology, Baotou (Caili Wang), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X. Liang) and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Zhengrong Liu), Guangzhou, the Department of Nephrology, Chinese Academy of Medical Sciences, Peking Union Medical College Hospital (X. Li), the Department of Nephrology, Peking University People's Hospital (L.Z.), the Renal Division, Department of Medicine, Peking University First Hospital and Institute of Nephrology, Peking University (M.Z.), and the Department of Nephrology, Chinese People's Liberation Army General Hospital, State Key Lab of Kidney Disease, National Clinical Research Center for Kidney Disease (G.-Y.C.), Beijing, the First Affiliated Hospital of Nanchang University, Nanchang (L.L.), the Department of Nephrology, Lanzhou University Second Hospital, Lanzhou (J.W.), and the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.) - all in China; and FibroGen, San Francisco (R.L., Chunrong Wang, C.L., T.N., L.S., K.-H.P.Y.)
| | - Guang-Yan Cai
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), the Division of Nephrology, Huashan Hospital Fudan University (C.H.), and the Department of Nephrology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (G.J.), Shanghai, the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing University School of Medicine (Zhihong Liu), Nanjing, First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Baotou Medical College of Inner Mongolia University of Science and Technology, Baotou (Caili Wang), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X. Liang) and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Zhengrong Liu), Guangzhou, the Department of Nephrology, Chinese Academy of Medical Sciences, Peking Union Medical College Hospital (X. Li), the Department of Nephrology, Peking University People's Hospital (L.Z.), the Renal Division, Department of Medicine, Peking University First Hospital and Institute of Nephrology, Peking University (M.Z.), and the Department of Nephrology, Chinese People's Liberation Army General Hospital, State Key Lab of Kidney Disease, National Clinical Research Center for Kidney Disease (G.-Y.C.), Beijing, the First Affiliated Hospital of Nanchang University, Nanchang (L.L.), the Department of Nephrology, Lanzhou University Second Hospital, Lanzhou (J.W.), and the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.) - all in China; and FibroGen, San Francisco (R.L., Chunrong Wang, C.L., T.N., L.S., K.-H.P.Y.)
| | - Li Hao
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), the Division of Nephrology, Huashan Hospital Fudan University (C.H.), and the Department of Nephrology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (G.J.), Shanghai, the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing University School of Medicine (Zhihong Liu), Nanjing, First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Baotou Medical College of Inner Mongolia University of Science and Technology, Baotou (Caili Wang), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X. Liang) and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Zhengrong Liu), Guangzhou, the Department of Nephrology, Chinese Academy of Medical Sciences, Peking Union Medical College Hospital (X. Li), the Department of Nephrology, Peking University People's Hospital (L.Z.), the Renal Division, Department of Medicine, Peking University First Hospital and Institute of Nephrology, Peking University (M.Z.), and the Department of Nephrology, Chinese People's Liberation Army General Hospital, State Key Lab of Kidney Disease, National Clinical Research Center for Kidney Disease (G.-Y.C.), Beijing, the First Affiliated Hospital of Nanchang University, Nanchang (L.L.), the Department of Nephrology, Lanzhou University Second Hospital, Lanzhou (J.W.), and the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.) - all in China; and FibroGen, San Francisco (R.L., Chunrong Wang, C.L., T.N., L.S., K.-H.P.Y.)
| | - Robert Leong
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), the Division of Nephrology, Huashan Hospital Fudan University (C.H.), and the Department of Nephrology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (G.J.), Shanghai, the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing University School of Medicine (Zhihong Liu), Nanjing, First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Baotou Medical College of Inner Mongolia University of Science and Technology, Baotou (Caili Wang), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X. Liang) and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Zhengrong Liu), Guangzhou, the Department of Nephrology, Chinese Academy of Medical Sciences, Peking Union Medical College Hospital (X. Li), the Department of Nephrology, Peking University People's Hospital (L.Z.), the Renal Division, Department of Medicine, Peking University First Hospital and Institute of Nephrology, Peking University (M.Z.), and the Department of Nephrology, Chinese People's Liberation Army General Hospital, State Key Lab of Kidney Disease, National Clinical Research Center for Kidney Disease (G.-Y.C.), Beijing, the First Affiliated Hospital of Nanchang University, Nanchang (L.L.), the Department of Nephrology, Lanzhou University Second Hospital, Lanzhou (J.W.), and the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.) - all in China; and FibroGen, San Francisco (R.L., Chunrong Wang, C.L., T.N., L.S., K.-H.P.Y.)
| | - Chunrong Wang
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), the Division of Nephrology, Huashan Hospital Fudan University (C.H.), and the Department of Nephrology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (G.J.), Shanghai, the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing University School of Medicine (Zhihong Liu), Nanjing, First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Baotou Medical College of Inner Mongolia University of Science and Technology, Baotou (Caili Wang), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X. Liang) and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Zhengrong Liu), Guangzhou, the Department of Nephrology, Chinese Academy of Medical Sciences, Peking Union Medical College Hospital (X. Li), the Department of Nephrology, Peking University People's Hospital (L.Z.), the Renal Division, Department of Medicine, Peking University First Hospital and Institute of Nephrology, Peking University (M.Z.), and the Department of Nephrology, Chinese People's Liberation Army General Hospital, State Key Lab of Kidney Disease, National Clinical Research Center for Kidney Disease (G.-Y.C.), Beijing, the First Affiliated Hospital of Nanchang University, Nanchang (L.L.), the Department of Nephrology, Lanzhou University Second Hospital, Lanzhou (J.W.), and the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.) - all in China; and FibroGen, San Francisco (R.L., Chunrong Wang, C.L., T.N., L.S., K.-H.P.Y.)
| | - Cameron Liu
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), the Division of Nephrology, Huashan Hospital Fudan University (C.H.), and the Department of Nephrology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (G.J.), Shanghai, the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing University School of Medicine (Zhihong Liu), Nanjing, First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Baotou Medical College of Inner Mongolia University of Science and Technology, Baotou (Caili Wang), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X. Liang) and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Zhengrong Liu), Guangzhou, the Department of Nephrology, Chinese Academy of Medical Sciences, Peking Union Medical College Hospital (X. Li), the Department of Nephrology, Peking University People's Hospital (L.Z.), the Renal Division, Department of Medicine, Peking University First Hospital and Institute of Nephrology, Peking University (M.Z.), and the Department of Nephrology, Chinese People's Liberation Army General Hospital, State Key Lab of Kidney Disease, National Clinical Research Center for Kidney Disease (G.-Y.C.), Beijing, the First Affiliated Hospital of Nanchang University, Nanchang (L.L.), the Department of Nephrology, Lanzhou University Second Hospital, Lanzhou (J.W.), and the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.) - all in China; and FibroGen, San Francisco (R.L., Chunrong Wang, C.L., T.N., L.S., K.-H.P.Y.)
| | - Thomas Neff
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), the Division of Nephrology, Huashan Hospital Fudan University (C.H.), and the Department of Nephrology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (G.J.), Shanghai, the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing University School of Medicine (Zhihong Liu), Nanjing, First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Baotou Medical College of Inner Mongolia University of Science and Technology, Baotou (Caili Wang), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X. Liang) and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Zhengrong Liu), Guangzhou, the Department of Nephrology, Chinese Academy of Medical Sciences, Peking Union Medical College Hospital (X. Li), the Department of Nephrology, Peking University People's Hospital (L.Z.), the Renal Division, Department of Medicine, Peking University First Hospital and Institute of Nephrology, Peking University (M.Z.), and the Department of Nephrology, Chinese People's Liberation Army General Hospital, State Key Lab of Kidney Disease, National Clinical Research Center for Kidney Disease (G.-Y.C.), Beijing, the First Affiliated Hospital of Nanchang University, Nanchang (L.L.), the Department of Nephrology, Lanzhou University Second Hospital, Lanzhou (J.W.), and the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.) - all in China; and FibroGen, San Francisco (R.L., Chunrong Wang, C.L., T.N., L.S., K.-H.P.Y.)
| | - Lynda Szczech
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), the Division of Nephrology, Huashan Hospital Fudan University (C.H.), and the Department of Nephrology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (G.J.), Shanghai, the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing University School of Medicine (Zhihong Liu), Nanjing, First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Baotou Medical College of Inner Mongolia University of Science and Technology, Baotou (Caili Wang), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X. Liang) and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Zhengrong Liu), Guangzhou, the Department of Nephrology, Chinese Academy of Medical Sciences, Peking Union Medical College Hospital (X. Li), the Department of Nephrology, Peking University People's Hospital (L.Z.), the Renal Division, Department of Medicine, Peking University First Hospital and Institute of Nephrology, Peking University (M.Z.), and the Department of Nephrology, Chinese People's Liberation Army General Hospital, State Key Lab of Kidney Disease, National Clinical Research Center for Kidney Disease (G.-Y.C.), Beijing, the First Affiliated Hospital of Nanchang University, Nanchang (L.L.), the Department of Nephrology, Lanzhou University Second Hospital, Lanzhou (J.W.), and the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.) - all in China; and FibroGen, San Francisco (R.L., Chunrong Wang, C.L., T.N., L.S., K.-H.P.Y.)
| | - Kin-Hung P Yu
- From the Department of Nephrology, Institute of Nephrology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine (N.C.), the Division of Nephrology, Huashan Hospital Fudan University (C.H.), and the Department of Nephrology, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine (G.J.), Shanghai, the Institute of Nephrology, Zhong Da Hospital, Southeast University School of Medicine (B.-C.L.), the Department of Nephrology, First Affiliated Hospital (Jiangsu Province Hospital), Nanjing Medical University (C.X.), and the National Clinical Research Center of Kidney Diseases, Jinling Hospital, Nanjing University School of Medicine (Zhihong Liu), Nanjing, First Affiliated Hospital of Dalian Medical University, Dalian (H.L.), the Department of Nephrology, First Affiliated Hospital of Baotou Medical College of Inner Mongolia University of Science and Technology, Baotou (Caili Wang), the Division of Nephrology, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences (X. Liang) and the Renal Division, Nanfang Hospital, Southern Medical University, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research (Zhengrong Liu), Guangzhou, the Department of Nephrology, Chinese Academy of Medical Sciences, Peking Union Medical College Hospital (X. Li), the Department of Nephrology, Peking University People's Hospital (L.Z.), the Renal Division, Department of Medicine, Peking University First Hospital and Institute of Nephrology, Peking University (M.Z.), and the Department of Nephrology, Chinese People's Liberation Army General Hospital, State Key Lab of Kidney Disease, National Clinical Research Center for Kidney Disease (G.-Y.C.), Beijing, the First Affiliated Hospital of Nanchang University, Nanchang (L.L.), the Department of Nephrology, Lanzhou University Second Hospital, Lanzhou (J.W.), and the Department of Nephrology, Second Hospital of Anhui Medical University, Hefei (L.H.) - all in China; and FibroGen, San Francisco (R.L., Chunrong Wang, C.L., T.N., L.S., K.-H.P.Y.)
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Akizawa T, Macdougall IC, Berns JS, Yamamoto H, Taguchi M, Iekushi K, Bernhardt T. Iron Regulation by Molidustat, a Daily Oral Hypoxia-Inducible Factor Prolyl Hydroxylase Inhibitor, in Patients with Chronic Kidney Disease. Nephron Clin Pract 2019; 143:243-254. [PMID: 31387097 PMCID: PMC6979436 DOI: 10.1159/000502012] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 07/09/2019] [Accepted: 07/09/2019] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND/AIMS The current treatment for anemia associated with chronic kidney disease (CKD) includes the administration of erythropoiesis stimulating agents (ESAs) combined with iron supplementation. Molidustat, a hypoxia-inducible factor prolyl hydroxylase inhibitor, has potential to treat anemia associated with CKD through increased erythropoietin production and improved iron availability. Here, we report the effect of molidustat on iron metabolism. METHOD Parameters of iron metabolism were monitored in three 16-week, randomized, controlled, phase 2 studies assessing the safety and efficacy of molidustat in the treatment of anemia associated with CKD in different populations: treatment-naïve and previously ESA-treated patients not on dialysis, and previously ESA-treated patients on hemodialysis. Iron supplementation was left at the discretion of the investigator. RESULTS In treatment-naïve patients not on dialysis, transferrin saturation (TSAT), hepcidin, ferritin, and iron concentrations decreased with molidustat, whereas total iron binding capacity (TIBC) increased. Similar results were observed in previously ESA-treated patients not on dialysis, although changes in those parameters were larger in treatment-naïve than in previously ESA-treated patients. In previously ESA-treated patients receiving hemodialysis, hepcidin concentration and TIBC remained stable with molidustat, whereas TSAT and ferritin and iron concentrations increased. Generally, similar trends were observed in secondary analyses of subgroups of patients not receiving iron supplementation. CONCLUSIONS Molidustat is a potential alternative to standard treatment of anemia associated with CKD, with a different mechanism of action. In patients not receiving dialysis, molidustat increases iron availability. In patients receiving hemodialysis, further investigation is required to understand fully the mechanisms underlying iron mobilization associated with molidustat.
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Affiliation(s)
- Tadao Akizawa
- Division of Nephrology, Department of Medicine, Showa University School of Medicine, Tokyo, Japan,
| | - Iain C Macdougall
- Department of Renal Medicine, King's College Hospital, London, United Kingdom
| | - Jeffrey S Berns
- Perelman School of Medicine at the University of Pennsylvania, Hospital of the University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Hiroyasu Yamamoto
- Division of Nephrology and Hypertension, Department of Internal Medicine, The Jikei University School of Medicine, Tokyo, Japan
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136
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Schley G, Klanke B, Kalucka J, Schatz V, Daniel C, Mayer M, Goppelt-Struebe M, Herrmann M, Thorsteinsdottir M, Palsson R, Beneke A, Katschinski DM, Burzlaff N, Eckardt KU, Weidemann A, Jantsch J, Willam C. Mononuclear phagocytes orchestrate prolyl hydroxylase inhibition-mediated renoprotection in chronic tubulointerstitial nephritis. Kidney Int 2019; 96:378-396. [DOI: 10.1016/j.kint.2019.02.016] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 01/14/2019] [Accepted: 02/14/2019] [Indexed: 12/22/2022]
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137
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Akizawa T, Otsuka T, Reusch M, Ueno M. Intermittent Oral Dosing of Roxadustat in Peritoneal Dialysis Chronic Kidney Disease Patients with Anemia: A Randomized, Phase 3, Multicenter, Open-Label Study. Ther Apher Dial 2019; 24:115-125. [PMID: 31222951 PMCID: PMC7079122 DOI: 10.1111/1744-9987.12888] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 06/12/2019] [Accepted: 06/17/2019] [Indexed: 12/14/2022]
Abstract
Roxadustat is an oral hypoxia-inducible factor prolyl hydroxylase inhibitor developed to treat anemia in chronic kidney disease (CKD) patients. This Phase 3, randomized, open-label, 24-week study investigated the efficacy and safety of roxadustat in Japanese CKD patients with anemia on peritoneal dialysis (PD) who were previously treated or not treated with erythropoiesis stimulating agents (ESAs). Patients not previously receiving ESA (ESA-Naïve group) were randomized to roxadustat at a starting dose of 50 or 70 mg three times weekly; patients previously receiving ESA (ESA-Converted group) switched from ESA to roxadustat 70 or 100 mg three times weekly depending on the prior ESA dose. Outcomes included maintenance rate of average hemoglobin (Hb) level within 10-12 g/dL at weeks 18-24, cumulative response rate at end of treatment (Hb thresholds, 10.0 g/dL or 10.5 g/dL; Hb increase, ≥1.0 g/dL), and average Hb levels at weeks 18-24. Safety was assessed by occurrence of treatment-emergent adverse events (TEAEs). Fifty-six patients were enrolled (ESA-Naïve, n = 13; ESA-Converted, n = 43). Maintenance rates (weeks 18-24) were 92.3% (95% CI: 64.0-99.8; ESA-Naïve) and 74.4% (95% CI: 58.8-86.5; ESA-Converted). Cumulative response rate was 100.0% in the ESA-Naïve group. Average Hb levels (weeks 18-24) were 11.05 g/dL (95% CI: 10.67-11.42; ESA-Naïve) and 10.93 g/dL (95% CI: 10.73-11.13; ESA-Converted). Common TEAEs included nasopharyngitis and back pain. Roxadustat was well tolerated and effective in maintaining target Hb levels in CKD patients on PD who were previously treated or not treated with ESA.
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Affiliation(s)
| | | | | | - Mai Ueno
- Astellas Pharma, Inc., Tokyo, Japan
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138
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Singh C, Hoppe G, Tran V, McCollum L, Bolok Y, Song W, Sharma A, Brunengraber H, Sears JE. Serine and 1-carbon metabolism are required for HIF-mediated protection against retinopathy of prematurity. JCI Insight 2019; 4:129398. [PMID: 31341109 DOI: 10.1172/jci.insight.129398] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Accepted: 06/13/2019] [Indexed: 12/14/2022] Open
Abstract
We determined which metabolic pathways are activated by hypoxia-inducible factor 1-mediated (HIF-1-mediated) protection against oxygen-induced retinopathy (OIR) in newborn mice, the experimental correlate to retinopathy of prematurity, a leading cause of infant blindness. HIF-1 coordinates the change from oxidative to glycolytic metabolism and mediates flux through serine and 1-carbon metabolism (1CM) in hypoxic and cancer cells. We used untargeted metabolite profiling in vivo to demonstrate that hypoxia mimesis activates serine/1CM. Both [13C6] glucose labeling of metabolites in ex vivo retinal explants as well as in vivo [13C3] serine labeling of metabolites followed in liver lysates strongly suggest that retinal serine is primarily derived from hepatic glycolytic carbon and not from retinal glycolytic carbon in newborn pups. In HIF-1α2lox/2lox albumin-Cre-knockout mice, reduced or near-0 levels of serine/glycine further demonstrate the hepatic origin of retinal serine. Furthermore, inhibition of 1CM by methotrexate blocked HIF-mediated protection against OIR. This demonstrated that 1CM participates in protection induced by HIF-1 stabilization. The urea cycle also dominated pathway enrichment analyses of plasma samples. The dependence of retinal serine on hepatic HIF-1 and the upregulation of the urea cycle emphasize the importance of the liver to remote protection of the retina.
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Affiliation(s)
| | - George Hoppe
- Cole Eye Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Vincent Tran
- Cole Eye Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Leah McCollum
- Cole Eye Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Youstina Bolok
- Cole Eye Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Weilin Song
- Cole Eye Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Amit Sharma
- Cole Eye Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Henri Brunengraber
- Department of Nutrition, Case Western Reserve University, Cleveland, Ohio, USA
| | - Jonathan E Sears
- Cole Eye Institute, Cleveland Clinic, Cleveland, Ohio, USA.,Cardiovascular and Metabolic Sciences, Cleveland Clinic, Cleveland, Ohio, USA
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Sanghani NS, Haase VH. Hypoxia-Inducible Factor Activators in Renal Anemia: Current Clinical Experience. Adv Chronic Kidney Dis 2019; 26:253-266. [PMID: 31477256 PMCID: PMC7318915 DOI: 10.1053/j.ackd.2019.04.004] [Citation(s) in RCA: 120] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 04/26/2019] [Accepted: 04/30/2019] [Indexed: 12/14/2022]
Abstract
Prolyl hydroxylase domain oxygen sensors are dioxygenases that regulate the activity of hypoxia-inducible factor (HIF), which controls renal and hepatic erythropoietin production and coordinates erythropoiesis with iron metabolism. Small molecule inhibitors of prolyl hydroxylase domain dioxygenases (HIF-PHI [prolyl hydroxylase inhibitor]) stimulate the production of endogenous erythropoietin and improve iron metabolism resulting in efficacious anemia management in patients with CKD. Three oral HIF-PHIs-daprodustat, roxadustat, and vadadustat-have now advanced to global phase III clinical development culminating in the recent licensing of roxadustat for oral anemia therapy in China. Here, we survey current clinical experience with HIF-PHIs, discuss potential therapeutic advantages, and deliberate over safety concerns regarding long-term administration in patients with renal anemia.
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Affiliation(s)
- Neil S Sanghani
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN
| | - Volker H Haase
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN; Department of Medical Cell Biology, Uppsala Universitet, Uppsala, Sweden; Department of Molecular Physiology & Biophysics and Program in Cancer Biology, Vanderbilt University School of Medicine, Nashville, TN.
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Saito H, Tanaka T, Sugahara M, Tanaka S, Fukui K, Wakashima T, Nangaku M. Inhibition of prolyl hydroxylase domain (PHD) by JTZ-951 reduces obesity-related diseases in the liver, white adipose tissue, and kidney in mice with a high-fat diet. J Transl Med 2019; 99:1217-1232. [PMID: 30952940 DOI: 10.1038/s41374-019-0239-4] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Revised: 01/16/2019] [Accepted: 01/28/2019] [Indexed: 12/11/2022] Open
Abstract
The epidemic of obesity and its complications is rapidly increasing worldwide. Recent drug discoveries established the utility of prolyl hydroxylase domain (PHD) inhibitors as stabilizers of hypoxia-inducible factors (HIFs) in vivo, which are currently in human clinical studies for the treatment of anemia in chronic kidney disease (CKD). These studies suggest a role for PHD inhibitors in ameliorating obesity and hyperlipidemia. We hypothesized that HIF activation using a PHD inhibitor, JTZ-951, protects from obesity-related diseases in the white adipose tissue (WAT), liver, and kidney in mice fed with high-fat diet (HFD). Eight-week-old, C57BL/6J mice were fed with HFD for 20 weeks with or without JTZ-951(0.005%; mixed in chow). Body weight and plasma non-high-density lipoprotein (HDL) cholesterol levels were significantly lower in the JTZ-951 group as compared with the vehicle group. PHD inhibition improved liver steatosis, macrophage infiltration into WAT and adipocyte fibrosis. In the kidney, PHD inhibition reduced albuminuria. Histologically, the number of F4/80- positive infiltrating macrophages and mesangial expansion were milder in the JTZ-951 group. Relative mRNA expression of adiponectin in WAT was higher in the JTZ-951-treated group and inversely correlated with hepatic steatosis score, adipocyte macrophage aggregation, and albuminuria. Activation of HIF ameliorates multiple obesity-related consequences in mice with HFD. The results of the present study offer the promising view that pharmacological PHD inhibition may be beneficial for the treatment of obesity-related diseases that can be ameliorated by weight loss.
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Affiliation(s)
- Hisako Saito
- Division of Nephrology and Endocrinology, The University of Tokyo Graduate School of Medicine, Tokyo, Japan
| | - Tetsuhiro Tanaka
- Division of Nephrology and Endocrinology, The University of Tokyo Graduate School of Medicine, Tokyo, Japan.
| | - Mai Sugahara
- Division of Nephrology and Endocrinology, The University of Tokyo Graduate School of Medicine, Tokyo, Japan
| | - Shinji Tanaka
- Division of Nephrology and Endocrinology, The University of Tokyo Graduate School of Medicine, Tokyo, Japan
| | - Kenji Fukui
- Division of Nephrology and Endocrinology, The University of Tokyo Graduate School of Medicine, Tokyo, Japan.,Biological and Pharmacological Research Laboratories, Central Pharmaceutical Research Institute, Japan Tobacco Inc, Osaka, Japan
| | - Takeshi Wakashima
- Division of Nephrology and Endocrinology, The University of Tokyo Graduate School of Medicine, Tokyo, Japan.,Biological and Pharmacological Research Laboratories, Central Pharmaceutical Research Institute, Japan Tobacco Inc, Osaka, Japan
| | - Masaomi Nangaku
- Division of Nephrology and Endocrinology, The University of Tokyo Graduate School of Medicine, Tokyo, Japan.
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Roxadustat Treatment of Chronic Kidney Disease-Associated Anemia in Japanese Patients Not on Dialysis: A Phase 2, Randomized, Double-Blind, Placebo-Controlled Trial. Adv Ther 2019; 36:1438-1454. [PMID: 30953333 PMCID: PMC6824366 DOI: 10.1007/s12325-019-00943-4] [Citation(s) in RCA: 65] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Indexed: 12/17/2022]
Abstract
Introduction This study evaluated efficacy and safety/tolerability of roxadustat, an oral hypoxia-inducible factor prolyl hydroxylase inhibitor, in Japanese anemic non-dialysis-dependent chronic kidney disease (NDD-CKD) patients. Methods In this phase 2, double-blind, 24-week study, NDD-CKD patients were randomized to oral placebo or roxadustat (50, 70, or 100 mg) three times weekly (TIW) for 6 weeks followed by dose adjustments to maintain hemoglobin (Hb) at 10–12 g/dL for 18 weeks; patients meeting pre-defined criteria were re-randomized to TIW or once-weekly dosing. The primary end point was rate of rise of Hb (g/dL/week) during the first 6 weeks; secondary end points included response rate (Hb ≥ 10.0 g/dL and increase in Hb from baseline ≥ 1 g/dL) and mean Hb and change from baseline in Hb at weeks 18–24. The main safety outcomes were vital signs, laboratory test results, electrocardiograms, and frequency of treatment-emergent adverse events. Results Of 107 patients randomized, 83 completed the study. The mean (SD) rate of rise of Hb during the first 6 weeks was − 0.052 (0.142) for placebo and + 0.200 (0.160), + 0.453 (0.256), and + 0.570 (0.240) for roxadustat 50-, 70-, and 100-mg TIW groups, respectively (p < 0.001). Response rate was 14.8% for placebo and 81.5%, 100%, and 100% for roxadustat TIW groups (p < 0.001). Change in Hb from baseline at weeks 18–24 was − 0.17 (0.61) for placebo and + 1.10 (0.71), + 1.33 (0.82), and + 1.55 (0.88) g/dL for roxadustat TIW groups (p < 0.001). No deaths or major adverse cardiac events occurred with roxadustat. Conclusion Roxadustat was well tolerated and effective in correcting Hb levels within 6 weeks in Japanese anemic NDD-CKD patients. Trial registration ClinicalTrials.gov: NCT01964196. Registered 15 October 2013 (retrospectively registered). Funding Astellas Pharma Inc. Electronic supplementary material The online version of this article (10.1007/s12325-019-00943-4) contains supplementary material, which is available to authorized users.
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Spinowitz B, Pecoits-Filho R, Winkelmayer WC, Pergola PE, Rochette S, Thompson-Leduc P, Lefebvre P, Shafai G, Bozas A, Sanon M, Krasa HB. Economic and quality of life burden of anemia on patients with CKD on dialysis: a systematic review. J Med Econ 2019; 22:593-604. [PMID: 30813807 DOI: 10.1080/13696998.2019.1588738] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Aims: The overall cost and health-related quality of life (HRQoL) associated with current treatments for chronic kidney disease (CKD)-related anemia are not well characterized. A systematic literature review (SLR) was conducted on the costs and HRQoL associated with current treatments for CKD-related anemia among dialysis-dependent (DD) patients. Materials and methods: The authors searched the Cochrane Library, MEDLINE, EMBASE, NHS EED, and NHS HTA for English-language publications. Original studies published between January 1, 2000 and March 17, 2017 meeting the following criteria were included: adult population; study focus was CKD-related anemia; included results on patients receiving iron supplementation, red blood cell transfusion, or erythropoiesis stimulating agents (ESAs); reported results on HRQoL and/or costs. Studies which included patients with DD-CKD, did not directly compare different treatments, and had designs relevant to the objective were retained. HRQoL and cost outcomes, including healthcare resource utilization (HRU), were extracted and summarized in a narrative synthesis. Results: A total of 1,625 publications were retrieved, 15 of which met all inclusion criteria. All identified studies included ESAs as a treatment of interest. Two randomized controlled trials reported that ESA treatment improves HRQoL relative to placebo. Across eight studies comparing HRQoL of patients achieving high vs low hemoglobin (Hb) targets, aiming for higher Hb targets with ESAs generally led to modest HRQoL improvements. Two studies reported that ESA-treated patients had lower costs and HRU compared to untreated patients. One study found that aiming for higher vs lower Hb targets led to reduced HRU, while two other reported that this led to a reduction in cost-effectiveness. Limitations: Heterogeneity of study designs and outcomes; a meta-analysis could not be performed. Conclusions: ESA-treated patients undergoing dialysis incurred lower costs, lower HRU, and had better HRQoL relative to ESA-untreated patients. However, treatment to higher Hb targets led to modest HRQoL improvements compared to lower Hb targets.
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Affiliation(s)
| | - Roberto Pecoits-Filho
- b George Institute for Global Health , Newtown , NSW , Australia
- c School of Medicine Pontificia Universidade Catolica do Parana , Curitiba , PR , Brazil
| | | | | | | | | | | | - Gigi Shafai
- g Akebia Therapeutics , Cambridge , MA , USA
| | - Ana Bozas
- g Akebia Therapeutics , Cambridge , MA , USA
| | - Myrlene Sanon
- h Otsuka Pharmaceutical Development & Commercialization , Rockville , MD , USA
| | - Holly B Krasa
- h Otsuka Pharmaceutical Development & Commercialization , Rockville , MD , USA
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143
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Akizawa T, Nangaku M, Yamaguchi T, Arai M, Koretomo R, Maeda K, Miyazawa Y, Hirakata H. Enarodustat, Conversion and Maintenance Therapy for Anemia in Hemodialysis Patients: A Randomized, Placebo-Controlled Phase 2b Trial Followed by Long-Term Trial. Nephron Clin Pract 2019; 143:77-85. [PMID: 31117088 DOI: 10.1159/000500487] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2018] [Accepted: 04/16/2019] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Enarodustat (JTZ-951) is an orally available hypoxia-inducible factor prolyl hydroxylase inhibitor that increases endogenous erythropoietin levels in the treatment of anemia associated with chronic kidney disease (CKD). OBJECTIVE A phase 2b study of enarodustat to assess the hemoglobin (Hb) response, safety, and maintenance dosage was conducted in Japanese anemic patients with hemodialysis-dependent CKD. METHODS Subjects receiving a stable dose of an erythropoiesis-stimulating agent were randomized to receive once-daily enarodustat at a dose of 2, 4, or 6 mg or placebo in a double-blind manner for 6 weeks (Period 1) followed by 24-week open treatment with enarodustat, adjusted in the range of 2-8 mg to maintain Hb within a target range (10.0-12.0 g/dL; Period 2). RESULTS Change in Hb from baseline increased with enarodustat dose in Period 1. In Period 2, the proportion of subjects who maintained their Hb level within the target range at the end of treatment was 65.1%. To maintain Hb levels within the target range over the course of Period 2, approximately 80% of subjects required 2 dose adjustments or fewer. Enarodustat decreased hepcidin and ferritin levels, increased total iron-binding capacity, and was generally well tolerated. CONCLUSIONS Enarodustat corrected and maintained Hb levels in anemic patients with hemodialysis-dependent CKD. Phase 3 studies of enarodustat are currently ongoing.
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Affiliation(s)
- Tadao Akizawa
- Division of Nephrology, Department of Medicine, Showa University School of Medicine, Tokyo, Japan,
| | - Masaomi Nangaku
- Division of Nephrology and Endocrinology, The University of Tokyo, Tokyo, Japan
| | - Takuhiro Yamaguchi
- Division of Biostatistics, Tohoku University Graduate School of Medicine, Miyagi, Japan
| | - Masanobu Arai
- Pharmaceutical Division, Japan Tobacco Inc., Tokyo, Japan
| | | | - Kazuo Maeda
- Pharmaceutical Division, Japan Tobacco Inc., Tokyo, Japan
| | - Yuya Miyazawa
- Pharmaceutical Division, Japan Tobacco Inc., Tokyo, Japan
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144
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Fujimoto TN, Colbert LE, Huang Y, Molkentine JM, Deorukhkar A, Baseler L, de la Cruz Bonilla M, Yu M, Lin D, Gupta S, Cabeceiras PK, Kingsley CV, Tailor RC, Sawakuchi GO, Koay EJ, Piwnica-Worms H, Maitra A, Taniguchi CM. Selective EGLN Inhibition Enables Ablative Radiotherapy and Improves Survival in Unresectable Pancreatic Cancer. Cancer Res 2019; 79:2327-2338. [PMID: 31043430 PMCID: PMC6666414 DOI: 10.1158/0008-5472.can-18-1785] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 01/03/2019] [Accepted: 03/06/2019] [Indexed: 12/17/2022]
Abstract
When pancreatic cancer cannot be removed surgically, patients frequently experience morbidity and death from progression of their primary tumor. Radiation therapy (RT) cannot yet substitute for an operation because radiation causes fatal bleeding and ulceration of the nearby stomach and intestines before achieving tumor control. There are no FDA-approved medications that prevent or reduce radiation-induced gastrointestinal injury. Here, we overcome this fundamental problem of anatomy and biology with the use of the oral EGLN inhibitor FG-4592, which selectively protects the intestinal tract from radiation toxicity without protecting tumors. A total of 70 KPC mice with autochthonous pancreatic tumors received oral FG-4592 or vehicle control ± ablative RT to a cumulative 75 Gy administered in 15 daily fractions to a limited tumor field. Although ablative RT reduced complications from local tumor progression, fatal gastrointestinal bleeding was observed in 56% of mice that received high-dose RT with vehicle control. However, radiation-induced bleeding was completely ameliorated in mice that received high-dose RT with FG-4592 (0% bleeding, P < 0.0001 compared with vehicle). Furthermore, FG-4592 reduced epithelial apoptosis by half (P = 0.002) and increased intestinal microvessel density by 80% compared with vehicle controls. EGLN inhibition did not stimulate cancer growth, as treatment with FG-4592 alone, or overexpression of HIF2 within KPC tumors independently improved survival. Thus, we provide a proof of concept for the selective protection of the intestinal tract by the EGLN inhibition to enable ablative doses of cytotoxic therapy in unresectable pancreatic cancer by reducing untoward morbidity and death from radiation-induced gastrointestinal bleeding. SIGNIFICANCE: Selective protection of the intestinal tract by EGLN inhibition enables potentially definitive doses of radiation therapy. This might allow radiation to be a surgical surrogate for unresectable pancreatic cancer.Graphical Abstract: http://cancerres.aacrjournals.org/content/canres/79/9/2327/F1.large.jpg.
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Affiliation(s)
- Tara N Fujimoto
- Department of Experimental Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Lauren E Colbert
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Yanqing Huang
- Department of Experimental Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Jessica M Molkentine
- Department of Experimental Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Amit Deorukhkar
- Department of Experimental Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Laura Baseler
- Department of Veterinary Medicine & Surgery, UT MD Anderson Cancer Center, Houston, Texas
| | - Marimar de la Cruz Bonilla
- Department of Experimental Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Meifang Yu
- Department of Experimental Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Daniel Lin
- Department of Experimental Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Sonal Gupta
- Department of Pathology, UT MD Anderson Cancer Center, Houston, Texas
- Department of Translational Molecular Pathology, UT MD Anderson Cancer Center, Houston, Texas
| | - Peter K Cabeceiras
- Department of Experimental Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Charles V Kingsley
- Department of Imaging Physics, UT MD Anderson Cancer Center, Houston, Texas
| | - Ramesh C Tailor
- Department of Radiation Physics, UT MD Anderson Cancer Center, Houston, Texas
| | - Gabriel O Sawakuchi
- Department of Radiation Physics, UT MD Anderson Cancer Center, Houston, Texas
| | - Eugene J Koay
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Helen Piwnica-Worms
- Department of Experimental Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
| | - Anirban Maitra
- Department of Pathology, UT MD Anderson Cancer Center, Houston, Texas
- Department of Translational Molecular Pathology, UT MD Anderson Cancer Center, Houston, Texas
| | - Cullen M Taniguchi
- Department of Experimental Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas.
- Department of Radiation Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas
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Sousa Fialho MDL, Abd Jamil AH, Stannard GA, Heather LC. Hypoxia-inducible factor 1 signalling, metabolism and its therapeutic potential in cardiovascular disease. Biochim Biophys Acta Mol Basis Dis 2019; 1865:831-843. [DOI: 10.1016/j.bbadis.2018.09.024] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 08/24/2018] [Accepted: 09/18/2018] [Indexed: 12/20/2022]
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146
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Abstract
Cells respond to hypoxia by shifting cellular processes from general housekeeping functions to activating specialized hypoxia-response pathways. Oxygen plays an important role in generating ATP to maintain a productive rate of protein synthesis in normoxia. In hypoxia, the rate of the canonical protein synthesis pathway is significantly slowed and impaired due to limited ATP availability, necessitating an alternative mechanism to mediate protein synthesis and facilitate adaptation. Hypoxia adaptation is largely mediated by hypoxia-inducible factors (HIFs). While HIFs are well known for their transcriptional functions, they also play imperative roles in translation to mediate hypoxic protein synthesis. Such adaptations to hypoxia are often hyperactive in solid tumors, contributing to the expression of cancer hallmarks, including treatment resistance. The current literature on protein synthesis in hypoxia is reviewed here, inclusive of hypoxia-specific mRNA selection to translation termination. Current HIF targeting therapies are also discussed as are the opportunities involved with targeting hypoxia specific protein synthesis pathways.
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Affiliation(s)
- Nancy T Chee
- Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, 1501 NW 10th Avenue, Miami, FL, 33136, USA
| | - Ines Lohse
- Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, 1501 NW 10th Avenue, Miami, FL, 33136, USA
| | - Shaun P Brothers
- Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, 1501 NW 10th Avenue, Miami, FL, 33136, USA.
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147
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Price C, Gill S, Ho ZV, Davidson SM, Merkel E, McFarland JM, Leung L, Tang A, Kost-Alimova M, Tsherniak A, Jonas O, Vazquez F, Hahn WC. Genome-Wide Interrogation of Human Cancers Identifies EGLN1 Dependency in Clear Cell Ovarian Cancers. Cancer Res 2019; 79:2564-2579. [PMID: 30898838 DOI: 10.1158/0008-5472.can-18-2674] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 01/18/2019] [Accepted: 03/14/2019] [Indexed: 12/17/2022]
Abstract
We hypothesized that candidate dependencies for which there are small molecules that are either approved or in advanced development for a nononcology indication may represent potential therapeutic targets. To test this hypothesis, we performed genome-scale loss-of-function screens in hundreds of cancer cell lines. We found that knockout of EGLN1, which encodes prolyl hydroxylase domain-containing protein 2 (PHD2), reduced the proliferation of a subset of clear cell ovarian cancer cell lines in vitro. EGLN1-dependent cells exhibited sensitivity to the pan-EGLN inhibitor FG-4592. The response to FG-4592 was reversed by deletion of HIF1A, demonstrating that EGLN1 dependency was related to negative regulation of HIF1A. We also found that ovarian clear cell tumors susceptible to both genetic and pharmacologic inhibition of EGLN1 required intact HIF1A. Collectively, these observations identify EGLN1 as a cancer target with therapeutic potential. SIGNIFICANCE: These findings reveal a differential dependency of clear cell ovarian cancers on EGLN1, thus identifying EGLN1 as a potential therapeutic target in clear cell ovarian cancer patients.
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Affiliation(s)
- Colles Price
- Broad Institute of Harvard and MIT, Cambridge, Massachusetts.,Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts.,Harvard Medical School, Boston, Massachusetts
| | - Stanley Gill
- Broad Institute of Harvard and MIT, Cambridge, Massachusetts.,Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts
| | - Zandra V Ho
- Broad Institute of Harvard and MIT, Cambridge, Massachusetts
| | - Shawn M Davidson
- Broad Institute of Harvard and MIT, Cambridge, Massachusetts.,Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, Massachusetts
| | - Erin Merkel
- Broad Institute of Harvard and MIT, Cambridge, Massachusetts
| | | | - Lisa Leung
- Broad Institute of Harvard and MIT, Cambridge, Massachusetts
| | - Andrew Tang
- Broad Institute of Harvard and MIT, Cambridge, Massachusetts
| | | | - Aviad Tsherniak
- Broad Institute of Harvard and MIT, Cambridge, Massachusetts
| | - Oliver Jonas
- Broad Institute of Harvard and MIT, Cambridge, Massachusetts.,Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, Massachusetts
| | - Francisca Vazquez
- Broad Institute of Harvard and MIT, Cambridge, Massachusetts.,Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts
| | - William C Hahn
- Broad Institute of Harvard and MIT, Cambridge, Massachusetts. .,Department of Medical Oncology, Dana-Farber Cancer Institute, Boston, Massachusetts.,Harvard Medical School, Boston, Massachusetts.,Department of Medicine, Brigham and Women's Hospital, Boston, Massachusetts
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Effect of Multiple Doses of Omeprazole on the Pharmacokinetics, Safety, and Tolerability of Roxadustat in Healthy Subjects. Eur J Drug Metab Pharmacokinet 2019; 43:685-692. [PMID: 29752643 PMCID: PMC6244714 DOI: 10.1007/s13318-018-0480-z] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
BACKGROUND AND OBJECTIVES Roxadustat is an orally active hypoxia-inducible factor prolyl hydroxylase inhibitor for the treatment of anemia in chronic kidney disease. This study investigated the effect of multiple daily oral doses of omeprazole on the pharmacokinetics, safety, and tolerability of a single oral dose of roxadustat. METHODS This phase 1, open-label, two-period, one-sequence, crossover study enrolled healthy subjects. During Period 1, subjects received a single oral dose of 100 mg roxadustat. After a ≥ 7-day washout, subjects started Period 2 and received daily oral doses of 40 mg omeprazole on Days 1-9, and a single oral dose of 100 mg roxadustat on Day 7. Roxadustat pharmacokinetics were assessed on Days 1-4 in Period 1 and on Days 7-10 in Period 2. Primary endpoints were area under the concentration-time profile from the time of dosing extrapolated to infinity (AUCinf) and maximum concentration (Cmax). Safety was assessed by vital signs, laboratory tests, electrocardiograms, and nature, frequency, and severity of treatment-emergent adverse events (TEAEs). RESULTS Eighteen subjects were enrolled. The geometric least squares mean ratio for both AUCinf and Cmax of roxadustat (with omeprazole/alone) was 104.5%; 90% confidence intervals were within the no-effect boundaries of 80.0 and 125.0%, indicating no significant effect of omeprazole on the pharmacokinetics of roxadustat. No serious TEAEs were reported. CONCLUSION Multiple daily oral doses of 40 mg omeprazole had no significant effect on the pharmacokinetics of a single oral dose of 100 mg roxadustat. Roxadustat was considered safe and well tolerated when administered alone or in combination with multiple daily oral doses of 40 mg omeprazole in healthy subjects.
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149
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Sheetz M, Barrington P, Callies S, Berg PH, McColm J, Marbury T, Decker B, Dyas GL, Truhlar SME, Benschop R, Leung D, Berg J, Witcher DR. Targeting the hepcidin-ferroportin pathway in anaemia of chronic kidney disease. Br J Clin Pharmacol 2019; 85:935-948. [PMID: 30677788 DOI: 10.1111/bcp.13877] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Revised: 01/04/2019] [Accepted: 01/13/2019] [Indexed: 12/15/2022] Open
Abstract
AIMS Erythropoiesis-stimulating agents used to treat anaemia in patients with chronic kidney disease (CKD) have been associated with cardiovascular adverse events. Hepcidin production, controlled by bone morphogenic protein 6 (BMP6), regulates iron homeostasis via interactions with the iron transporter, ferroportin. High hepcidin levels are thought to contribute to increased iron sequestration and subsequent anaemia in CKD patients. To investigate alternative therapies to erythropoiesis-stimulating agents for CKD patients, monoclonal antibodies, LY3113593 and LY2928057, targeting BMP6 and ferroportin respectively, were tested in CKD patients. METHODS Preclinical in vitro/vivo data and clinical data in healthy subjects and CKD patients were used to illustrate the translation of pharmacological properties of LY3113593 and LY2928057, highlighting the novelty of targeting these nodes within the hepcidin-ferroportin pathway. RESULTS LY2928057 bound ferroportin and blocked interactions with hepcidin, allowing iron efflux, leading to increased serum iron and transferrin saturation levels and increased hepcidin in monkeys and humans. In CKD patients, LY2928057 led to slower haemoglobin decline and reduction in ferritin (compared to placebo). Serum iron increase was (mean [90% confidence interval]) 1.98 [1.46-2.68] and 1.36 [1.22-1.51] fold-relative to baseline following LY2928057 600 mg and LY311593 150 mg respectively in CKD patients. LY3113593 specifically blocked BMP6 binding to its receptor and produced increases in iron and transferrin saturation and decreases in hepcidin preclinically and clinically. In CKD patients, LY3113593 produced an increase in haemoglobin and reduction in ferritin (compared to placebo). CONCLUSION LY3113593 and LY2928057 pharmacological effects (serum iron and ferritin) were translated from preclinical-to-clinical development. Such interventions may lead to new CKD anaemia treatments.
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Affiliation(s)
| | | | | | - Paul H Berg
- Eli Lilly and Company, Indianapolis, Indiana, USA
| | | | | | - Brian Decker
- Indiana University School of Medicine, Indianapolis, Indiana, USA
| | | | | | | | | | - Jolene Berg
- DaVita Clinical Research, Minneapolis, Minnesota, USA
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150
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Abstract
PURPOSE OF REVIEW Historically, the identity of O2-sensing renal erythropoietin (Epo)-producing (REP) cells was a matter of debate. This review summarizes how recent breakthroughs in transgenic mouse and in-situ hybridization techniques have facilitated sensitive and specific detection of REP cells and accelerated advancements in the understanding of the regulation of renal Epo production in health and disease. RECENT FINDINGS REP cells are a dynamically regulated unique subpopulation of tubulointerstitial cells with features of fibroblasts, pericytes and neurons. Under normal conditions, REP cells are located in the corticomedullary border region within a steep decrement in O2 availability. During the progression of chronic kidney disease (CKD), REP cells cease Epo production, dedifferentiate and contribute to the progression of renal fibrosis. However, CKD patients with renal anaemia still respond with elevated Epo production following treatment with hypoxia-mimicking agents. SUMMARY We hypothesize that REP cells are neuron-like setpoint providers and controllers, which integrate information about blood O2 concentration and local O2 consumption via tissue pO2, and combine these inputs with intrinsic negative feedback loops and perhaps tubular cross-talk, converging in Epo regulation.
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