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Bianco A, Tiribelli C, Bellarosa C. Translational Approach to the Protective Effect of Bilirubin in Diabetic Kidney Disease. Biomedicines 2022; 10:biomedicines10030696. [PMID: 35327498 PMCID: PMC8945513 DOI: 10.3390/biomedicines10030696] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2022] [Revised: 03/14/2022] [Accepted: 03/15/2022] [Indexed: 02/07/2023] Open
Abstract
Bilirubin has been regarded as a powerful endogenous antioxidant and anti-inflammatory molecule, able to act on cellular pathways as a hormone. Diabetic kidney disease (DKD) is a common chronic complication of diabetes, and it is the leading cause of end-stage renal disease. Here, we will review the clinical and molecular features of mild hyperbilirubinemia in DKD. The pathogenesis of DKD involves oxidative stress, inflammation, fibrosis, and apoptosis. Serum bilirubin levels are positively correlated with the levels of the antioxidative enzymes as superoxide dismutase, catalase, and glutathione peroxidase, while it is inversely correlated with C-reactive protein, TNF-α, interleukin (IL)-2, IL-6, and IL-10 release in diabetic kidney disease. Bilirubin downregulates NADPH oxidase, reduces the induction of pro-fibrotic factor HIF-1α expression, cleaved caspase-3, and cleaved PARP induction showing lower DNA fragmentation. Recent experimental and clinical studies have demonstrated its effects in the development and progression of renal diseases, pointing out that only very mild elevations of bilirubin concentrations result in real clinical benefits. Future controlled studies are needed to explore the precise role of bilirubin in the pathogenesis of DKD and to understand if the use of serum bilirubin levels as a marker of progression or therapeutic target in DKD is feasible and realistic.
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Affiliation(s)
- Annalisa Bianco
- Italian Liver Foundation (FIF), 34149 Trieste, Italy; (A.B.); (C.T.)
- National Research Council, Institute of Biomedical Technologies, Bari Unit, 70126 Bari, Italy
| | - Claudio Tiribelli
- Italian Liver Foundation (FIF), 34149 Trieste, Italy; (A.B.); (C.T.)
| | - Cristina Bellarosa
- Italian Liver Foundation (FIF), 34149 Trieste, Italy; (A.B.); (C.T.)
- Correspondence:
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2
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Zhai M, Han M, Huang X, Kang F, Yang CH, Li J. Dexmedetomidine Protects Human Renal Tubular Epithelial HK-2 Cells against Hypoxia/Reoxygenation Injury by Inactivating Endoplasmic Reticulum Stress Pathway. CELL JOURNAL 2021; 23:457-464. [PMID: 34455722 PMCID: PMC8405080 DOI: 10.22074/cellj.2021.7220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Accepted: 03/04/2020] [Indexed: 11/20/2022]
Abstract
Objective The study was aimed to investigate the effects and potential mechanisms of Dexmedetomidine (Dex) on
hypoxia/reoxygenation (H/R) injury in human renal tubular epithelial HK-2 cells. Materials and Methods In this experimental study, HK-2 cells were divided into four groups: control group, Dex
group, H/R group, and Dex+H/R group. The cells in control group received no treatment, and cells in Dex group were
only treated with 0.1 nmol/L Dex. The cells in H/R group and Dex+H/R group were all treated with H/R (hypoxia for
24 hours and normoxia for 4 hours), and only the cells in Dex+H/R group were pre-administrated with 0.1 nmol/L
Dex. Following treatments at 37˚C for 28 hours, cell viability and apoptosis were measured by MTT assay and flow
cytometry, respectively. Also, the expressions of hypoxia-inducible factor 1 (HIF-1α), glucose-regulated protein 78
(GRP78), C/EBP homologous protein (CHOP), caspase-12 and cleaved caspase-3 were determined by western blot.
Results The cell viability was significant decreased in H/R group compared with control group (P<0.05), while was
significantly increased in Dex+H/R group compared with that in H/R group (P<0.05). However, the change tendency
of the cell apoptosis was opposite to that of cell viability. Compared with H/R group, the expression of HIF-1α was
evidently up-regulated, while GRP78, CHOP, capase-12 and cleaved caspase-3 expressions were all obviously down-
regulated in Dex+H/R group (P<0.05). In addition, the concentrations of malondialdehyde (MDA) in H/R group and
Dex+H/R group were 1.68 ± 0.22 nmol/mgprot and 0.85 ± 0.16 nmol/mgprot, respectively. The superoxide dismutase
(SOD) activity was higher in Dex+H/R group (121 ± 11 U/L), which which was more than twice larger than that in H/R
group (57 ± 10 U/L).
Conclusion Dex could promote cell viability and inhibit apoptosis through up-regulating HIF-1α, reducing endoplasmic
reticulum (ER) stress and mediating oxidative stress, thus ameliorating the H/R injury.
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Affiliation(s)
- Mingyu Zhai
- Department of Anesthesiology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China
| | - Mingming Han
- Department of Anesthesiology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China
| | - Xiang Huang
- Department of Anesthesiology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China
| | - Fang Kang
- Department of Anesthesiology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China
| | - C Hengwei Yang
- Department of Anesthesiology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China
| | - Juan Li
- Department of Anesthesiology, The First Affiliated Hospital of USTC, Division of Life Sciences and Medicine, University of Science and Technology of China, Hefei, Anhui, China
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3
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Hong B, Zhou J, Ma K, Zhang J, Xie H, Zhang K, Li L, Cai L, Zhang N, Zhang Z, Gong K. TRIB3 Promotes the Proliferation and Invasion of Renal Cell Carcinoma Cells via Activating MAPK Signaling Pathway. Int J Biol Sci 2019; 15:587-597. [PMID: 30745845 PMCID: PMC6367588 DOI: 10.7150/ijbs.29737] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 11/15/2018] [Indexed: 01/11/2023] Open
Abstract
Tribbles pseudokinase 3 (TRIB3) is a member of the mammalian pseudokinase tribbles family and is involved in multiple biological processes. However, the role of TRIB3 in renal cell carcinoma (RCC) remains unclear. In this study, we aimed to elucidate the biological functions of TRIB3 in RCC and explore its underlying mechanisms. TRIB3 expression and its correlation with clinicopathological features was evaluated in 123 patients with RCC. A series of cytological experiments were performed to clarify the biological functions of TRIB3, and potential molecular regulatory mechanisms were explored using transcriptome sequencing. TRIB3 expression was significantly elevated in RCC tissues compared to that in paracancerous tissues, and high expression of TRIB3 was correlated with both advanced tumor stage and unfavorable prognosis. TRIB3 knockdown markedly inhibited RCC cell proliferation, migration and invasion. Furthermore, overexpression of TRIB3 promoted RCC cell proliferation, migration, invasion and xenograft tumor growth. Notably, TRIB3 expression was modulated by hypoxia-inducible factor-1α (HIF-1α), which enhanced cell viability and invasiveness via targeting the MAPK signaling pathway. This study reveals the potential oncogenic role of TRIB3 in RCC pathogenesis and illustrates the mechanisms underlying TRIB3-mediated tumor progression, providing new insight into the development of TRIB3 as a tumor biomarker and therapeutic target.
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Affiliation(s)
- Baoan Hong
- Department of Urology, Peking University First Hospital, Beijing 100034, P.R. China.,Hereditary Kidney Cancer Research Center, Peking University First Hospital, Beijing 100034, P.R. China.,Institute of Urology, Peking University, Beijing 100034, P.R. China.,National Urological Cancer Center, Beijing 100034, P.R. China
| | - Jingcheng Zhou
- Department of Urology, Peking University First Hospital, Beijing 100034, P.R. China.,Hereditary Kidney Cancer Research Center, Peking University First Hospital, Beijing 100034, P.R. China.,Institute of Urology, Peking University, Beijing 100034, P.R. China.,National Urological Cancer Center, Beijing 100034, P.R. China
| | - Kaifang Ma
- Department of Urology, Peking University First Hospital, Beijing 100034, P.R. China.,Hereditary Kidney Cancer Research Center, Peking University First Hospital, Beijing 100034, P.R. China.,Institute of Urology, Peking University, Beijing 100034, P.R. China.,National Urological Cancer Center, Beijing 100034, P.R. China
| | - Jiufeng Zhang
- Department of Urology, Peking University First Hospital, Beijing 100034, P.R. China.,Hereditary Kidney Cancer Research Center, Peking University First Hospital, Beijing 100034, P.R. China.,Institute of Urology, Peking University, Beijing 100034, P.R. China.,National Urological Cancer Center, Beijing 100034, P.R. China
| | - Haibiao Xie
- Department of Urology, Peking University First Hospital, Beijing 100034, P.R. China.,Hereditary Kidney Cancer Research Center, Peking University First Hospital, Beijing 100034, P.R. China.,Institute of Urology, Peking University, Beijing 100034, P.R. China.,National Urological Cancer Center, Beijing 100034, P.R. China
| | - Kenan Zhang
- Department of Urology, Peking University First Hospital, Beijing 100034, P.R. China.,Hereditary Kidney Cancer Research Center, Peking University First Hospital, Beijing 100034, P.R. China.,Institute of Urology, Peking University, Beijing 100034, P.R. China.,National Urological Cancer Center, Beijing 100034, P.R. China
| | - Lei Li
- Department of Urology, Peking University First Hospital, Beijing 100034, P.R. China.,Hereditary Kidney Cancer Research Center, Peking University First Hospital, Beijing 100034, P.R. China.,Institute of Urology, Peking University, Beijing 100034, P.R. China.,National Urological Cancer Center, Beijing 100034, P.R. China
| | - Lin Cai
- Department of Urology, Peking University First Hospital, Beijing 100034, P.R. China.,Hereditary Kidney Cancer Research Center, Peking University First Hospital, Beijing 100034, P.R. China.,Institute of Urology, Peking University, Beijing 100034, P.R. China.,National Urological Cancer Center, Beijing 100034, P.R. China
| | - Ning Zhang
- Department of Urology, Beijing Cancer Hospital, Beijing 100142, P.R. China.,Beijing Institute for Cancer Research, Beijing 100142, P.R. China
| | - Zhongyuan Zhang
- Department of Urology, Peking University First Hospital, Beijing 100034, P.R. China.,Hereditary Kidney Cancer Research Center, Peking University First Hospital, Beijing 100034, P.R. China.,Institute of Urology, Peking University, Beijing 100034, P.R. China.,National Urological Cancer Center, Beijing 100034, P.R. China
| | - Kan Gong
- Department of Urology, Peking University First Hospital, Beijing 100034, P.R. China.,Hereditary Kidney Cancer Research Center, Peking University First Hospital, Beijing 100034, P.R. China.,Institute of Urology, Peking University, Beijing 100034, P.R. China.,National Urological Cancer Center, Beijing 100034, P.R. China
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Kong KH, Oh HJ, Lim BJ, Kim M, Han KH, Choi YH, Kwon K, Nam BY, Park KS, Park JT, Han SH, Yoo TH, Lee S, Kim SJ, Kang DH, Choi KB, Eremina V, Quaggin SE, Ryu DR, Kang SW. Selective tubular activation of hypoxia-inducible factor-2α has dual effects on renal fibrosis. Sci Rep 2017; 7:11351. [PMID: 28900259 PMCID: PMC5596020 DOI: 10.1038/s41598-017-11829-2] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Accepted: 08/30/2017] [Indexed: 12/11/2022] Open
Abstract
Hypoxia-inducible factor (HIF) is a key transcriptional factor in the response to hypoxia. Although the effect of HIF activation in chronic kidney disease (CKD) has been widely evaluated, the results have been inconsistent until now. This study aimed to investigate the effects of HIF-2α activation on renal fibrosis according to the activation timing in inducible tubule-specific transgenic mice with non-diabetic CKD. HIF-2α activation in renal tubular cells upregulated mRNA and protein expressions of fibronectin and type 1 collagen associated with the activation of p38 mitogen-activated protein kinase. In CKD mice, activation of HIF-2α at the beginning of CKD significantly aggravated renal fibrosis, whereas it did not lead to renal dysfunction. However, activation at a late-stage of CKD abrogated both renal dysfunction and fibrosis, which was associated with restoration of renal vasculature and amelioration of hypoxia through increased renal tubular expression of VEGF and its isoforms. As with tubular cells with HIF-2α activation, those under hypoxia also upregulated VEGF, fibronectin, and type 1 collagen expressions associated with HIF-1α activation. In conclusion, late-stage renal tubular HIF-2α activation has protective effects on renal fibrosis and the resultant renal dysfunction, thus it could represent a therapeutic target in late stage of CKD.
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Affiliation(s)
| | - Hyung Jung Oh
- Ewha Institute of Convergence Medicine, Ewha Womans University, Seoul, Korea
| | - Beom Jin Lim
- College of Medicine, Yonsei University, Seoul, Korea
| | - Minsuk Kim
- School of Medicine, Ewha Womans University, Seoul, Korea
| | - Ki-Hwan Han
- School of Medicine, Ewha Womans University, Seoul, Korea
| | - Youn-Hee Choi
- School of Medicine, Ewha Womans University, Seoul, Korea
- Tissue Injury Defense Research Center, Ewha Womans University, Seoul, Korea
| | - Kihwan Kwon
- School of Medicine, Ewha Womans University, Seoul, Korea
| | - Bo Young Nam
- College of Medicine, Yonsei University, Seoul, Korea
| | | | - Jung Tak Park
- College of Medicine, Yonsei University, Seoul, Korea
| | | | - Tae-Hyun Yoo
- College of Medicine, Yonsei University, Seoul, Korea
| | - Shina Lee
- School of Medicine, Ewha Womans University, Seoul, Korea
| | - Seung-Jung Kim
- School of Medicine, Ewha Womans University, Seoul, Korea
| | - Duk-Hee Kang
- School of Medicine, Ewha Womans University, Seoul, Korea
| | - Kyu Bok Choi
- School of Medicine, Ewha Womans University, Seoul, Korea
| | - Vera Eremina
- The Samuel Lunenfeld Research Institute, Toronto, Ontario, Canada
| | - Susan E Quaggin
- Feinberg Cardiovascular Research Institute and Division of Nephrology and Hypertension, Northwestern University, Chicago, Illinois, USA
| | - Dong-Ryeol Ryu
- School of Medicine, Ewha Womans University, Seoul, Korea.
- Tissue Injury Defense Research Center, Ewha Womans University, Seoul, Korea.
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Fähling M, Mathia S, Scheidl J, Abramovitch R, Milman Z, Paliege A, Peters H, Persson PB, Heyman SN, Rosenberger C. Cyclosporin a induces renal episodic hypoxia. Acta Physiol (Oxf) 2017; 219:625-639. [PMID: 27690155 DOI: 10.1111/apha.12811] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2016] [Revised: 04/29/2016] [Accepted: 09/21/2016] [Indexed: 01/20/2023]
Abstract
AIM Cyclosporin A (CsA) causes renal toxicity. The underlying mechanisms are incompletely understood, but may involve renal hypoxia and hypoxia-inducible factors (Hifs). We sought for hypoxia and Hif in mouse kidneys with CsA-induced toxicity, assessed their time course, Hif-mediated responses and the impact of interventional Hif upregulation. METHODS Mice received CsA or its solvent cremophore for up to 6 weeks. Low salt diet (Na+ ↓) was given in combination with CsA to enhance toxicity. We assessed fine morphology, renal function, blood oxygen level-dependent magnetic resonance imaging under room air and following changes in breathing gas composition which correlate with vascular reactivity, pimonidazole adducts (which indicate O2 tensions below 10 mmHg), Hif-α proteins, as well as expression of Hif target genes. Stable Hif upregulation was achieved by inducible, Pax8-rtTA-based knockout of von Hippel-Lindau protein (Vhl-KO), which is crucial for Hif-α degradation. RESULTS Cyclosporin A transiently increased renal deoxyhaemoglobin (R2*). Augmented vascular reactivity was observed at 2 h, but decreased at 24 h after CsA treatment. Na+ ↓/CsA provoked chronic renal failure with tubular degeneration and interstitial fibrosis. Nephron segments at risk for injury accumulated pimonidazole adducts, as well as Hif-α proteins. Remarkably, Hif target gene expression remained unchanged, while factor-inhibiting Hif (Fih) was enhanced. Na+ ↓/CsA/Vhl-KO aggravated morpho-functional outcome of chronic renal CsA toxicity. CONCLUSIONS Cyclosporin A provokes episodic hypoxia in nephron segments most susceptible to chronic CsA toxicity. Fih is upregulated and likely blocks further Hif activity. Continuous tubular Hif upregulation via Vhl-KO worsens the outcome of chronic CsA-induced renal toxicity.
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Affiliation(s)
- M. Fähling
- Vegetative Physiologie; Charité - Universitätsmedizin Berlin; Berlin Germany
| | - S. Mathia
- Vegetative Physiologie; Charité - Universitätsmedizin Berlin; Berlin Germany
- Nephrology and Renal Transplantation; Charité - Universitätsmedizin Berlin; Berlin Germany
| | - J. Scheidl
- Gastroenterology; Krankenhaus Westend; Berlin Germany
| | - R. Abramovitch
- The Goldyne Savad Institute of Gene Therapy; Hadassah Hebrew University Medical Center; Jerusalem Israel
| | - Z. Milman
- The Goldyne Savad Institute of Gene Therapy; Hadassah Hebrew University Medical Center; Jerusalem Israel
| | - A. Paliege
- Nephrology and Renal Transplantation; Charité - Universitätsmedizin Berlin; Berlin Germany
| | - H. Peters
- Nephrology and Renal Transplantation; Charité - Universitätsmedizin Berlin; Berlin Germany
| | - P. B. Persson
- Vegetative Physiologie; Charité - Universitätsmedizin Berlin; Berlin Germany
| | - S. N. Heyman
- Medicine; Hadassah Hebrew University Medical Center; Jerusalem Israel
| | - C. Rosenberger
- Nephrology and Renal Transplantation; Charité - Universitätsmedizin Berlin; Berlin Germany
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6
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Bidirectional signalling between EphA2 and ephrinA1 increases tubular cell attachment, laminin secretion and modulates erythropoietin expression after renal hypoxic injury. Pflugers Arch 2016; 468:1433-48. [PMID: 27228995 DOI: 10.1007/s00424-016-1838-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Revised: 05/01/2016] [Accepted: 05/10/2016] [Indexed: 10/21/2022]
Abstract
Acute kidney injury (AKI) is common in hospitalized patients and has a poor prognosis, the severity of AKI being linked to progression to chronic kidney disease. This stresses the need to search for protective mechanisms during the acute phase. We investigated kidney repair after hypoxic injury using a rat model of renal artery branch ligation, which led to an oxygen gradient vertical to the corticomedullary axis. Three distinct zones were observed: tubular necrosis, infarction border zone and preserved normal tissue. EphA2 is a receptor tyrosine kinase with pivotal roles in cell architecture, migration and survival, upon juxtacrine contact with its membrane-bound ligand EphrinA1. Following hypoxia, EphA2 was up-regulated in cortical and medullary tubular cells, while EphrinA1 was up-regulated in interstitial cells adjacent to peritubular capillaries. Moreover, erythropoietin (EPO) messenger RNA (mRNA) was strongly expressed in the border zone of infarcted kidney within the first 6 h. To gain more insight into the biological impact of EphA2 and EphrinA1 up-regulation, we activated the signalling pathways in vitro using recombinant EphrinA1/Fc or EphA2/Fc proteins. Stimulation of EphA2 forward signalling in the proximal tubular cell line HK2 increased cell attachment and laminin secretion at the baso-lateral side. Conversely, activation of reverse signalling through EphrinA1 expressed by Hep3B cells promoted EPO production at both the transcriptional and protein level. Strikingly, in co-culture experiments, juxtacrine contact between EphA2 expressing MDCK and EphrinA1 expressing Hep3B was sufficient to induce a significant up-regulation of EPO mRNA production in the latter cells, even in the absence of hypoxic conditions. The synergistic effects of EphA2 and hypoxia led to a 15-20-fold increase of EPO expression. Collectively, our results suggest an important role of EphA2/EphrinA1 signalling in kidney repair after hypoxic injury through stimulation of (i) tubular cell attachment, (ii) secretion of basal membrane proteins and (iii) EPO production. These findings could thus pave the way to new therapeutic approaches.
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7
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Patel L, Thaker A. The effects of A2B receptor modulators on vascular endothelial growth factor and nitric oxide axis in chronic cyclosporine nephropathy. J Pharmacol Pharmacother 2015; 6:147-53. [PMID: 26311998 PMCID: PMC4544136 DOI: 10.4103/0976-500x.162014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2014] [Revised: 05/25/2015] [Accepted: 06/15/2015] [Indexed: 11/16/2022] Open
Abstract
Introduction: To investigate the actions of adenosine A2B receptor modulators on VEGF and NO levels in CsA nephropathy. Materials and Methods: Nephropathy was induced by administrating 25 mg/kg (s.c) of CsA for 5 weeks. The VEGF and NO levels were measured in kidney tissue. Serum creatinine, creatinine clearance, urinary albumin excretion, blood urea nitrogen, kidney pathology score were measured to assess renal function. The analysis of mRNA expression of A2B receptor and VEGF was performed. Results: Administration of CsA for 5 weeks induced adverse renal function. The mRNA expression of VEGF was reduced in renal tissue after 5 weeks of CsA treatment. The renal VEGF and NO levels were also reduced in these animals. In vivo administration of A2B adenosine receptor agonist increased renal VEGF which was inhibited by a selective A2B AR antagonist (MRS1754) in CsA-treated animals. The increase in VEGF was associated with reversal of adverse renal functions. The effects of A2B AR modulators were prominent in CsA-treated animals compared with control animals suggesting CsA treatment may upregulate A2B ARs. The mRNA expression of A2B AR was increased after 5 weeks of CsA. Conclusions: A2B AR modulators may provide new therapeutic options to retard CsA nephropathy by mediating renal VEGF and NO.
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Affiliation(s)
- Leena Patel
- Department of Pharmacology, Ramanbhai Patel College of Pharmacy, Charotar University of Science and Technology, Anand, Gujarat, India
| | - Aswin Thaker
- Department of Pharmacology and Toxicology, College of Veterinary Science and Animal Husbandry, Anand Agricultural University, Anand, Gujarat, India
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Kim SG, Ahn SY, Lee ES, Kim S, Na KY, Chae DW, Chin HJ. Bilirubin activates transcription of HIF-1α in human proximal tubular cells cultured in the physiologic oxygen content. J Korean Med Sci 2014; 29 Suppl 2:S146-54. [PMID: 25317019 PMCID: PMC4194285 DOI: 10.3346/jkms.2014.29.s2.s146] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Accepted: 08/26/2014] [Indexed: 11/20/2022] Open
Abstract
The expression of hypoxia-inducible factor (HIF) is influenced by reactive oxygen species (ROS). Effect of bilirubin on HIF-1 expression in proximal tubular cells was investigated under physiological oxygen concentration, which is relative hypoxic condition mimicking oxygen content in the medulla of renal tissue. The human kidney (HK2) cells were cultured in 5% oxygen with or without bilirubin. HIF-1α protein expression was increased by bilirubin treatment at 0.01-0.2 mg/dL concentration. The messenger RNA expression of HIF-1α was increased by 1.69±0.05 folds in the cells cultured with 0.1 mg/dL bilirubin, compared to the control cells. The inhibitors of PI3K/mTOR, PI3K/AKT, and ERK 1/2 pathways did not attenuate increased HIF-1α expression by bilirubin. HIF-1α expression decreased by 10 µM exogenous hydrogen peroxide (H2O2); scavenger of ROS with or without bilirubin in the HK2 cells increased HIF-1α concentration more than that in the cells without bilirubin. Exogenous H2O2 decreased the phosphorylation of P70S6 kinase, which was completely reversed by bilirubin treatment. Knockdown of NOX4 gene by small interfering RNA (siRNA) increased HIF-1α mRNA expression. In coonclusion, bilirubin enhances HIF-1α transcription as well as the up-regulation of HIF-1α protein translation through the attenuation of ROS and subunits of NADPH oxidase.
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Affiliation(s)
- Sung Gyun Kim
- Department of Internal Medicine, Hallym University College of Medicine, Seoul, Korea
- Department of Immunology, Seoul National University Postgraduate School, Seoul, Korea
| | - Shin-Young Ahn
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Eun Seong Lee
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Sejoong Kim
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Ki Young Na
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Dong-Wan Chae
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Ho Jun Chin
- Department of Immunology, Seoul National University Postgraduate School, Seoul, Korea
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
- Renal Institute, Seoul National University Medical Research Center, Seoul, Korea
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9
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Zhang YB, Wang X, Meister EA, Gong KR, Yan SC, Lu GW, Ji XM, Shao G. The effects of CoCl2 on HIF-1α protein under experimental conditions of autoprogressive hypoxia using mouse models. Int J Mol Sci 2014; 15:10999-1012. [PMID: 24945310 PMCID: PMC4100194 DOI: 10.3390/ijms150610999] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Revised: 06/10/2014] [Accepted: 06/11/2014] [Indexed: 12/22/2022] Open
Abstract
It is well known that cobalt chloride (CoCl2) can enhance the stability of hypoxia-inducible factor (HIF)-1α. The aim of this study is to detect the effect of CoCl2 on the hypoxia tolerance of mice which were repeatedly exposed to autoprogressive hypoxia. Balb/c mice were randomly divided into groups of chemical pretreatment and normal saline (NS), respectively injected with CoCl2 and NS 3 h before exposure to hypoxia for 0 run (H0), 1 run (H1), and 4 runs (H4). Western Blot, electrophoretic mobility shift assay (EMSA), extracellular recordings population spikes in area cornus ammonis I (CA 1) of mouse hippocampal slices and real-time were used in this study. Our results demonstrated that the tolerance of mice to hypoxia, the changes of HIF-1α protein level and HIF-1 DNA binding activity in mice hippocampus, the mRNA level of erythropoietin (EPO) and vascular endothelial growth factor (VEGF), and the disappearance time of population spikes of hippocampal slices were substantially different between the control group and the CoCl2 group. Over-induction of HIF-1α by pretreatment with CoCl2 before hypoxia did not increase the hypoxia tolerance.
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Affiliation(s)
- Yan-Bo Zhang
- Department of Neurology, Affiliated Hospital of Tai Shan Medical University, Taishan 271000, China.
| | - Xiulian Wang
- Department of Intensive Care Unit , 2nd Affiliated Hospital of Baotou Medical College, Baotou 014030, China.
| | - Edward A Meister
- Department of Medicine, University of Arizona, Tucson, AZ 85721, USA.
| | - Ke-Rui Gong
- Biomedicine Research Center and Basic Medical College, Baotou Medical College, Baotou 014060, China.
| | - Shao-Chun Yan
- Biomedicine Research Center and Basic Medical College, Baotou Medical College, Baotou 014060, China.
| | - Guo-Wei Lu
- Institute for Hypoxia Medicine, Xuanwu Hospital of Capital Medical University, Beijing 10054, China.
| | - Xun-Ming Ji
- Institute for Hypoxia Medicine, Xuanwu Hospital of Capital Medical University, Beijing 10054, China.
| | - Guo Shao
- Biomedicine Research Center and Basic Medical College, Baotou Medical College, Baotou 014060, China.
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10
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Suppression of abdominal aortic aneurysm formation by inhibition of prolyl hydroxylase domain protein through attenuation of inflammation and extracellular matrix disruption. Clin Sci (Lond) 2014; 126:671-8. [PMID: 24256203 DOI: 10.1042/cs20130435] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
In the present study we sought to determine the effect of CoCl2, an inhibitor of PHD (prolyl hydroxylase domain protein), on the development of AAA (abdominal aortic aneurysm). AAA was induced in C57BL/6 mice by periaortic application of CaCl2 (AAA group). NaCl (0.9%)-treated mice were used as a sham control (SHAM group). Mice were treated with 0.05% CoCl2 in the drinking water (AAA/CoCl2 group). At 1 and 6 weeks after the operation, aortic tissue was excised for further examination. After 6 weeks of CaCl2 treatment, aortic diameter and macrophage infiltration into the aortic adventitia were increased in the AAA group compared with the SHAM group. Treatment with CoCl2 reduced the aneurysmal size and macrophage infiltration compared with the AAA group. Aortic expression of inflammatory cytokines and MCP-1 (monocyte chemoattractant protein-1) and the activities of MMP-9 (matrix metalloproteinase-9) and MMP-2 were enhanced in the AAA group and attenuated in the AAA/CoCl2 group. Expression of cytokines and the activities of MMPs were already increased after 1 week of CaCl2 treatment, but were suppressed by CoCl2 treatment in association with reduced NF-κB (nuclear factor κB) phosphorylation. Treatment with CoCl2 in mice prevented the development of CaCl2-induced AAA in association with reduced inflammation and ECM (extracellular matrix) disruption. The results of the present study suggest that PHD plays a critical role in the development of AAA and that there is a therapeutic potential for PHD inhibitors in the prevention of AAA development.
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Mao S, Huang S. The signaling pathway of hypoxia inducible factor and its role in renal diseases. J Recept Signal Transduct Res 2013; 33:344-8. [PMID: 23971630 DOI: 10.3109/10799893.2013.830130] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
It is well-documented that hypoxia inducible factor (HIF) is a key mediator of tissue and cellular adaptation to hypoxia. HIF-target genes are also involved in cellular apoptosis and profibrotic mechanisms. The role of HIF in diseases is not consistent. It is a risk factor for tumor progression, whereas it plays a protective role against ischemic hypofusion. For renal diseases, it is not always a risk or protective factor. Many factors are involved in the pathogenesis of renal diseases. It is reported that HIF not only increases hypoxia tolerance, but also regulates a lot of signaling pathways. In the past decades, a number of studies were also conducted to explore the association between HIF and the risk of renal diseases. However, the role of HIF in the development of renal diseases was not entirely clear. In this study, the signal transduction pathways of HIF and its role in the pathogenesis of renal diseases were reviewed.
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Affiliation(s)
- Song Mao
- Department of Nephrology, Nanjing Children's Hospital, Affiliated to Nanjing Medical University , Nanjing, Jiangsu , China
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Zheng JP, Zhang X, Wang H, Wang Y, Cheng Z, Yin P, Peng W. Vasomotor Dysfunction in the Mesenteric Artery after Organ Culture with Cyclosporin A. Basic Clin Pharmacol Toxicol 2013; 113:370-6. [PMID: 23809336 DOI: 10.1111/bcpt.12105] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Accepted: 06/24/2013] [Indexed: 12/17/2022]
Affiliation(s)
- Jian-Pu Zheng
- Experimental Research Center; Putuo Hospital; Shanghai University of Traditional Chinese Medicine; Shanghai China
| | - Xuemei Zhang
- Department of Pharmacology; School of Pharmacy; Fudan University; Shanghai China
| | - Hao Wang
- Department of Nephrology; Putuo Hospital; Shanghai University of Traditional Chinese Medicine; Shanghai China
| | - Yunman Wang
- Department of Nephrology; Putuo Hospital; Shanghai University of Traditional Chinese Medicine; Shanghai China
| | - Zhuoan Cheng
- Experimental Research Center; Putuo Hospital; Shanghai University of Traditional Chinese Medicine; Shanghai China
| | - Peihao Yin
- Department of General Surgery; Putuo Hospital; Shanghai University of Traditional Chinese Medicine; Shanghai China
| | - Wen Peng
- Department of Nephrology; Putuo Hospital; Shanghai University of Traditional Chinese Medicine; Shanghai China
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Ahn JM, You SJ, Lee YM, Oh SW, Ahn SY, Kim S, Chin HJ, Chae DW, Na KY. Hypoxia-inducible factor activation protects the kidney from gentamicin-induced acute injury. PLoS One 2012; 7:e48952. [PMID: 23145036 PMCID: PMC3493596 DOI: 10.1371/journal.pone.0048952] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Accepted: 10/03/2012] [Indexed: 01/28/2023] Open
Abstract
Gentamicin nephrotoxicity is one of the most common causes of acute kidney injury (AKI). Hypoxia-inducible factor (HIF) is effective in protecting the kidney from ischemic and toxic injury. Increased expression of HIF-1α mRNA has been reported in rats with gentamicin-induced renal injury. We hypothesizd that we could study the role of HIF in gentamicin-induced AKI by modulating HIF activity. In this study, we investigated whether HIF activation had protective effects on gentamicin-induced renal tubule cell injury. Gentamicin-induced AKI was established in male Sprague-Dawley rats. Cobalt was continuously infused into the rats to activate HIF. HK-2 cells were pre-treated with cobalt or dimethyloxalylglycine (DMOG) to activate HIF and were then exposed to gentamicin. Cobalt or DMOG significantly increased HIF-1α expression in rat kidneys and HK-2 cells. In HK-2 cells, HIF inhibited gentamicin-induced reactive oxygen species (ROS) formation. HIF also protected these cells from apoptosis by reducing caspase-3 activity and the amount of cleaved caspase-3, and -9 proteins. Increased expression of HIF-1α reduced the number of gentamicin-induced apoptotic cells in rat kidneys and HK-2 cells. HIF activation improved the creatinine clearance and proteinuria in gentamicin-induced AKI. HIF activation also ameliorated the extent of histologic injury and reduced macrophage infiltration into the tubulointerstitium. In gentamicin-induced AKI, the activation of HIF by cobalt or DMOG attenuated renal dysfunction, proteinuria, and structural damage through a reduction of oxidative stress, inflammation, and apoptosis in renal tubular epithelial cells.
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Affiliation(s)
- Jeong-myung Ahn
- Department of Internal Medicine, Maryknoll Hospital, Busan, Korea
| | - Sun Jin You
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Yun-Mi Lee
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Se-Won Oh
- Department of Internal Medicine, Eulji General Hospital, Seongnam, Korea
| | - Shin-young Ahn
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Sejoong Kim
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
- Seoul National University College of Medicine, Seoul, Korea
| | - Ho Jun Chin
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
- Seoul National University College of Medicine, Seoul, Korea
| | - Dong-Wan Chae
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
- Seoul National University College of Medicine, Seoul, Korea
| | - Ki Young Na
- Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
- Seoul National University College of Medicine, Seoul, Korea
- * E-mail:
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