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Fujita K, Isozumi N, Zhu Q, Matsubayashi M, Taniguchi T, Arakawa H, Shirasaka Y, Mori E, Tamai I. Unique Binding Sites of Uricosuric Agent Dotinurad for Selective Inhibition of Renal Uric Acid Reabsorptive Transporter URAT1. J Pharmacol Exp Ther 2024; 390:99-107. [PMID: 38670801 DOI: 10.1124/jpet.124.002096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2024] [Revised: 03/22/2024] [Accepted: 04/15/2024] [Indexed: 04/28/2024] Open
Abstract
Dotinurad was developed as a uricosuric agent, inhibiting urate (UA) reabsorption through the UA transporter URAT1 in the kidneys. Due to its high selectivity for URAT1 among renal UA transporters, we investigated the mechanism underlying this selectivity by identifying dotinurad binding sites specific to URAT1. Dotinurad was docked to URAT1 using AutoDock4, utilizing the AlphaFold2-predicted structure. The inhibitory effects of dotinurad on wild-type and mutated URAT1 at the predicted binding sites were assessed through URAT1-mediated [14C]UA uptake in Xenopus oocytes. Nine amino acid residues in URAT1 were identified as dotinurad-binding sites. Sequence alignment with UA-transporting organic anion transporters (OATs) revealed that H142 and R487 were unique to URAT1 among renal UA-transporting OATs. For H142, IC50 values of dotinurad increased to 62, 55, and 76 nM for mutated URAT1 (H142A, H142E, and H142R, respectively) compared with 19 nM for the wild type, indicating that H142 contributes to URAT1-selective interaction with dotinurad. H142 was predicted to interact with the phenyl-hydroxyl group of dotinurad. The IC50 of the hydroxyl group methylated dotinurad (F13141) was 165 μM, 8420-fold higher than dotinurad, suggesting the interaction of H142 and the phenyl-hydroxyl group by forming a hydrogen bond. Regarding R487, URAT1-R487A exhibited a loss of activity. Interestingly, the URAT1-H142A/R487A double mutant restored UA transport activity, with the IC50 value of dotinurad for the mutant (388 nM) significantly higher than that for H142A (73.5 nM). These results demonstrate that H142 and R487 of URAT1 determine its selectivity for dotinurad, a uniqueness observed only in URAT1 among UA-transporting OATs. SIGNIFICANCE STATEMENT: Dotinurad selectively inhibits the urate reabsorption transporter URAT1 in renal urate-transporting organic ion transporters (OATs). This study demonstrates that dotinurad interacts with H142 and R487 of URAT1, located in the extracellular domain and unique among OATs when aligning amino acid sequences. Mutations in these residues reduce affinity of dotinurad for URAT1, confirming their role in conferring selective inhibition. Additionally, the interaction between dotinurad and URAT1 involving H142 is found to mediate hydrogen bonding.
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Affiliation(s)
- Kazuki Fujita
- Faculty of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kakuma-machi, Kanazawa, Japan (K.F., Q.Z., H.A., Y.S., I.T.); Department of Future Basic Medicine (N.I., E.M.) and V-iCliniX Laboratory (E.M.), Nara Medical University, Kashihara, Japan; and Research Laboratories 2, Fuji Yakuhin Co., Ltd., Nishi-Ward, Saitama, Japan (M.M., T.T.)
| | - Noriyoshi Isozumi
- Faculty of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kakuma-machi, Kanazawa, Japan (K.F., Q.Z., H.A., Y.S., I.T.); Department of Future Basic Medicine (N.I., E.M.) and V-iCliniX Laboratory (E.M.), Nara Medical University, Kashihara, Japan; and Research Laboratories 2, Fuji Yakuhin Co., Ltd., Nishi-Ward, Saitama, Japan (M.M., T.T.)
| | - Qiunan Zhu
- Faculty of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kakuma-machi, Kanazawa, Japan (K.F., Q.Z., H.A., Y.S., I.T.); Department of Future Basic Medicine (N.I., E.M.) and V-iCliniX Laboratory (E.M.), Nara Medical University, Kashihara, Japan; and Research Laboratories 2, Fuji Yakuhin Co., Ltd., Nishi-Ward, Saitama, Japan (M.M., T.T.)
| | - Masaya Matsubayashi
- Faculty of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kakuma-machi, Kanazawa, Japan (K.F., Q.Z., H.A., Y.S., I.T.); Department of Future Basic Medicine (N.I., E.M.) and V-iCliniX Laboratory (E.M.), Nara Medical University, Kashihara, Japan; and Research Laboratories 2, Fuji Yakuhin Co., Ltd., Nishi-Ward, Saitama, Japan (M.M., T.T.)
| | - Tetsuya Taniguchi
- Faculty of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kakuma-machi, Kanazawa, Japan (K.F., Q.Z., H.A., Y.S., I.T.); Department of Future Basic Medicine (N.I., E.M.) and V-iCliniX Laboratory (E.M.), Nara Medical University, Kashihara, Japan; and Research Laboratories 2, Fuji Yakuhin Co., Ltd., Nishi-Ward, Saitama, Japan (M.M., T.T.)
| | - Hiroshi Arakawa
- Faculty of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kakuma-machi, Kanazawa, Japan (K.F., Q.Z., H.A., Y.S., I.T.); Department of Future Basic Medicine (N.I., E.M.) and V-iCliniX Laboratory (E.M.), Nara Medical University, Kashihara, Japan; and Research Laboratories 2, Fuji Yakuhin Co., Ltd., Nishi-Ward, Saitama, Japan (M.M., T.T.)
| | - Yoshiyuki Shirasaka
- Faculty of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kakuma-machi, Kanazawa, Japan (K.F., Q.Z., H.A., Y.S., I.T.); Department of Future Basic Medicine (N.I., E.M.) and V-iCliniX Laboratory (E.M.), Nara Medical University, Kashihara, Japan; and Research Laboratories 2, Fuji Yakuhin Co., Ltd., Nishi-Ward, Saitama, Japan (M.M., T.T.)
| | - Eiichiro Mori
- Faculty of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kakuma-machi, Kanazawa, Japan (K.F., Q.Z., H.A., Y.S., I.T.); Department of Future Basic Medicine (N.I., E.M.) and V-iCliniX Laboratory (E.M.), Nara Medical University, Kashihara, Japan; and Research Laboratories 2, Fuji Yakuhin Co., Ltd., Nishi-Ward, Saitama, Japan (M.M., T.T.)
| | - Ikumi Tamai
- Faculty of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kakuma-machi, Kanazawa, Japan (K.F., Q.Z., H.A., Y.S., I.T.); Department of Future Basic Medicine (N.I., E.M.) and V-iCliniX Laboratory (E.M.), Nara Medical University, Kashihara, Japan; and Research Laboratories 2, Fuji Yakuhin Co., Ltd., Nishi-Ward, Saitama, Japan (M.M., T.T.)
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Yang S, Liu H, Fang XM, Yan F, Zhang Y. Signaling pathways in uric acid homeostasis and gout: From pathogenesis to therapeutic interventions. Int Immunopharmacol 2024; 132:111932. [PMID: 38560961 DOI: 10.1016/j.intimp.2024.111932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2024] [Revised: 03/20/2024] [Accepted: 03/24/2024] [Indexed: 04/04/2024]
Abstract
Uric acid is a product of purine degradation, and uric acid may have multiple physiologic roles, including the beneficial effects as an antioxidant and neuroprotector, maintenance of blood pressure during low salt ingestion, and modulation of immunity. However, overproduction of metabolic uric acid, and/or imbalance of renal uric acid secretion and reabsorption, and/or underexcretion of extrarenal uric acid, e.g. gut, will contribute to hyperuricemia, which is a common metabolic disease. Long-lasting hyperuricemia can induce the formation and deposition of monosodium urate (MSU) crystals within the joints and periarticular structures. MSU crystals further induce an acute, intensely painful, and sterile inflammation conditions named as gout by NLRP3 inflammasome-mediated cleavage of pro-IL-1β to bioactive IL-1β. Moreover, hyperuricemia and gout are associated with multiple cardiovascular and renal disorders, e.g., hypertension, myocardial infarction, stroke, obesity, hyperlipidemia, type 2 diabetes mellitus and chronic kidney disease. Although great efforts have been made by scientists of modern medicine, however, modern therapeutic strategies with a single target are difficult to exert long-term positive effects, and even some of these agents have severe adverse effects. The Chinese have used the ancient classic prescriptions of traditional Chinese medicine (TCM) to treat metabolic diseases, including gout, by multiple targets, for more than 2200 years. In this review, we discuss the current understanding of urate homeostasis, the pathogenesis of hyperuricemia and gout, and both modern medicine and TCM strategies for this commonly metabolic disorder. We hope these will provide the good references for treating hyperuricemia and gout.
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Affiliation(s)
- Shuangling Yang
- School of Health Sciences, Guangzhou Xinhua University, Guangzhou, Guangdong 510520, China
| | - Haimei Liu
- Department of Physiology, School of Basic Medical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, China
| | - Xian-Ming Fang
- Department of Cardiology, Ruikang Hospital Affiliated to Guangxi University of Chinese Medicine, Guangxi University of Chinese Medicine, Nanning, Guangxi 530011, China.
| | - Fuman Yan
- Department of Physiology, School of Basic Medical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, China.
| | - Yaxing Zhang
- Department of Physiology, School of Basic Medical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, China; Research Centre of Basic Integrative Medicine, School of Basic Medical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong 510006, China; Issue 12(th) of Guangxi Apprenticeship Education of Traditional Chinese Medicine (Shi‑Cheng Class of Guangxi University of Chinese Medicine), College of Continuing Education, Guangxi University of Chinese Medicine, Nanning, Guangxi 530001, China.
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Wen S, Arakawa H, Tamai I. Uric acid in health and disease: From physiological functions to pathogenic mechanisms. Pharmacol Ther 2024; 256:108615. [PMID: 38382882 DOI: 10.1016/j.pharmthera.2024.108615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2023] [Revised: 02/02/2024] [Accepted: 02/17/2024] [Indexed: 02/23/2024]
Abstract
Owing to renal reabsorption and the loss of uricase activity, uric acid (UA) is strictly maintained at a higher physiological level in humans than in other mammals, which provides a survival advantage during evolution but increases susceptibility to certain diseases such as gout. Although monosodium urate (MSU) crystal precipitation has been detected in different tissues of patients as a trigger for disease, the pathological role of soluble UA remains controversial due to the lack of causality in the clinical setting. Abnormal elevation or reduction of UA levels has been linked to some of pathological status, also known as U-shaped association, implying that the physiological levels of UA regulated by multiple enzymes and transporters are crucial for the maintenance of health. In addition, the protective potential of UA has also been proposed in aging and some diseases. Therefore, the role of UA as a double-edged sword in humans is determined by its physiological or non-physiological levels. In this review, we summarize biosynthesis, membrane transport, and physiological functions of UA. Then, we discuss the pathological involvement of hyperuricemia and hypouricemia as well as the underlying mechanisms by which UA at abnormal levels regulates the onset and progression of diseases. Finally, pharmacological strategies for urate-lowering therapy (ULT) are introduced, and current challenges in UA study and future perspectives are also described.
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Affiliation(s)
- Shijie Wen
- Faculty of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
| | - Hiroshi Arakawa
- Faculty of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan
| | - Ikumi Tamai
- Faculty of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Kanazawa, Japan.
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Goyal A, Changez MIK, Tariq MD, Mushtaq F, Shamim U, Sohail AH, Mahalwar G. Efficacy and outcomes of Bempedoic acid versus placebo in patients with statin-intolerance: A pilot systematic review and meta-analysis of randomized controlled trials. Curr Probl Cardiol 2024; 49:102236. [PMID: 38043880 DOI: 10.1016/j.cpcardiol.2023.102236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2023] [Accepted: 11/28/2023] [Indexed: 12/05/2023]
Abstract
INTRODUCTION Bempedoic acid (BA) has shown significant progress in reducing cholesterol levels and is relatively free from the many side effects encountered with the use of other hyperlipidemic drugs such as statins. However, its efficacy in patients with statin intolerance is controversial with inconsistent results among studies. MATERIALS AND METHODS An electronic literature search was performed using various databases such as Medline, Google Scholar, and the International Registry of Clinical Trials. The primary endpoint was the change in LDL-C levels. The secondary endpoints included changes in HDL-C, non-HDL-C, triglycerides (TG), clinical outcomes such as MACE, all-cause mortality (ACM), cardiovascular mortality, myocardial infarction (MI), and additional safety outcomes. The least-square mean (LSM) percent change for assessing changes in lipid parameter levels from the baseline and the risk ratio (RR) were used for the evaluation of binary endpoints, with statistical significance set at p<0.05. Random-effects meta-analyses were performed for all the outcomes. RESULTS Our analysis included 5 randomized controlled trials (RCTs) with a total of 18,848 participants. BA showed a significant reduction in LDL-C [LSM difference in %: -25.24; 95 % CI: -30.79 to -19.69; p < 0.00001], total cholesterol [LSM difference in %:-21.28; 95 % CI:-30.58 to-11.98; p < 0.00001], non-HDL-C [LSM difference in %: -23.27; 95 % Cl: -29.80 to -16.73 p < 0.00001], and HDL-C [LSM difference in %:-3.37, 95 % CI:-3.73 to-3.01, p < 0.00001] compared to placebo. In terms of clinical efficacy, BA was associated with a lower risk of coronary revascularization [RR:0.81; 95 % CI:0.66 to 0.99; p = 0.04], hospitalization for unstable angina [RR:0.67; 95 % CI:0.50 to 0.88; p = 0.005], and myocardial infarction [RR:0.76; 95 % CI:0.66 to 0.88;p = 0.0004]. No significant difference was observed in MACE [RR:0.81; p = 0.15], ACM [RR:0.86; p = 0.46], cardiovascular-related mortality [RR:0.79; p = 0.44], and stroke [RR:0.83; p = 0.08] between the two groups. In terms of safety efficacy, the risk for myalgia was significantly lower in BA-treated patients than in placebo [RR:0.80; p = 0.0002], while the risk for gout [RR:1.46; p < 0.0001] and hyperuricemia [RR:1.93; p < 0.00001] was higher for BA than for placebo. The risks for other adverse effects, such as neurocognitive disorder, nasopharyngitis urinary tract infection, upper respiratory infection, muscular disorder, and worsening hyperglycemia/DM were comparable between the two groups. CONCLUSION Our analysis demonstrated that BA significantly reduced the levels of LDL-C, total cholesterol, non-HDL-C, HDL-C, ApoB, and hs-CRP compared with the placebo group. Additionally, patients who received BA had a lower likelihood of coronary revascularization and hospitalization due to unstable angina, MI, and myalgia. Further large-scale RCTs are required to generate more robust evidence.
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Affiliation(s)
- Aman Goyal
- Department of Internal Medicine, Seth GS Medical College and KEM Hospital, Mumbai, India
| | - Mah I Kan Changez
- Department of Surgery, Quetta Institute of Medical Sciences, Quetta, Pakistan
| | - Muhammad Daoud Tariq
- Department of Internal Medicine, Foundation University Medical College, Islamabad, Pakistan
| | - Fiza Mushtaq
- Department of Internal Medicine, Allama Iqbal Medical College, Lahore, Pakistan
| | - Urooj Shamim
- Department of Internal Medicine Aga Khan University Hospital, Karachi, Pakistan
| | - Amir Humza Sohail
- Department of Surgery, University of New Mexico Health Sciences, Albuquerque, NM, USA
| | - Gauranga Mahalwar
- Department of Internal Medicine, Cleveland Clinic Foundation, Cleveland, OH, USA.
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Paponja K, Pećin I, Reiner Ž, Banach M. Bempedoic acid: new evidence and recommendations on use. Curr Opin Lipidol 2024; 35:41-50. [PMID: 38085172 DOI: 10.1097/mol.0000000000000911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2023]
Abstract
PURPOSES OF REVIEW Cardiovascular diseases (CVDs) are the leading cause of mortality and morbidity worldwide. Recognizing the importance of dyslipidemia treatment in the prevention of cardiovascular events has become a part of standard clinical practice. Desired values of LDL cholesterol (LDL-C) have become lower and lower in the last few decades, as evidenced by the most recent guidelines. Therefore, efforts to lower LDL cholesterol concentrations with conventional therapies and combinations of lipid-lowering therapy may not be successful in a high proportion of patients. RECENT FINDINGS Bempedoic acid is a novel agent, first in-class ATP Citrate Lyase (ACL) inhibitor, which targets biosynthesis of the cholesterol in the liver. Considering the results of phase 3 studies, it has been approved for sole use for dyslipidemia treatment for patients who are statin-intolerant or in combination with statin-ezetimibe for those suffering from familial hypercholesterolemia or ASCVD and unable to reach targeted LDL-C values. SUMMARY Bempedoic acid has proven beneficial for further reduction of LDL cholesterol for targeted groups of patients. It is not only efficient but also a well tolerated, affordable, and available agent whose place in lipid-lowering management is yet to be fully understood with new data collected from ongoing clinical research. In this review we suggest the place of bempedoic acid in lipid-lowering management.
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Affiliation(s)
- Kristina Paponja
- University Hospital Center Zagreb, Department of Internal Medicine, Division of Metabolic Diseases
| | - Ivan Pećin
- University Hospital Center Zagreb, Department of Internal Medicine, Division of Metabolic Diseases
- Zagreb School of Medicine, University of Zagreb, Zagreb, Croatia
| | - Željko Reiner
- University Hospital Center Zagreb, Department of Internal Medicine, Division of Metabolic Diseases
- Department of Cardiology and Congenital Diseases of Adults, Polish Mother's Memorial Hospital Research Institute
| | - Maciej Banach
- Department of Cardiology and Congenital Diseases of Adults, Polish Mother's Memorial Hospital Research Institute
- Department of Preventive Cardiology and Lipidology, Medical University of Lodz (MUL), Lodz, Poland
- Ciccarone Center for the Prevention of Cardiovascular Disease, Division of Cardiology, Department of Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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Sakaguchi YM, Wiriyasermkul P, Matsubayashi M, Miyasaka M, Sakaguchi N, Sahara Y, Takasato M, Kinugawa K, Sugie K, Eriguchi M, Tsuruya K, Kuniyasu H, Nagamori S, Mori E. Identification of three distinct cell populations for urate excretion in human kidneys. J Physiol Sci 2024; 74:1. [PMID: 38166558 PMCID: PMC10763458 DOI: 10.1186/s12576-023-00894-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2023] [Accepted: 11/26/2023] [Indexed: 01/04/2024]
Abstract
In humans, uric acid is an end-product of purine metabolism. Urate excretion from the human kidney is tightly regulated by reabsorption and secretion. At least eleven genes have been identified as human renal urate transporters. However, it remains unclear whether all renal tubular cells express the same set of urate transporters. Here, we show renal tubular cells are divided into three distinct cell populations for urate handling. Analysis of healthy human kidneys at single-cell resolution revealed that not all tubular cells expressed the same set of urate transporters. Only 32% of tubular cells were related to both reabsorption and secretion, while the remaining tubular cells were related to either reabsorption or secretion at 5% and 63%, respectively. These results provide physiological insight into the molecular function of the transporters and renal urate handling on single-cell units. Our findings suggest that three different cell populations cooperate to regulate urate excretion from the human kidney, and our proposed framework is a step forward in broadening the view from the molecular to the cellular level of transport capacity.
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Affiliation(s)
- Yoshihiko M Sakaguchi
- Department of Future Basic Medicine, Nara Medical University, Kashihara, Nara, Japan
- Center for SI Medical Research, The Jikei University School of Medicine, Tokyo, Japan
- Department of Laboratory Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - Pattama Wiriyasermkul
- Center for SI Medical Research, The Jikei University School of Medicine, Tokyo, Japan
- Department of Laboratory Medicine, The Jikei University School of Medicine, Tokyo, Japan
- Department of Biological Chemistry and Food Sciences, Faculty of Agriculture, Iwate University, Morioka, Iwate, Japan
| | - Masaya Matsubayashi
- Biological Research Department, Research Institute, Fuji Yakuhin Co., Ltd., Saitama, Japan
| | - Masaki Miyasaka
- Center for SI Medical Research, The Jikei University School of Medicine, Tokyo, Japan
- Department of Laboratory Medicine, The Jikei University School of Medicine, Tokyo, Japan
| | - Nau Sakaguchi
- Department of Future Basic Medicine, Nara Medical University, Kashihara, Nara, Japan
| | - Yoshiki Sahara
- RIKEN Center for Biosystems Dynamics Research, Kobe, Hyogo, Japan
- Graduate School of Biostudies, Kyoto University, Kyoto, Japan
| | - Minoru Takasato
- RIKEN Center for Biosystems Dynamics Research, Kobe, Hyogo, Japan
- Graduate School of Biostudies, Kyoto University, Kyoto, Japan
| | - Kaoru Kinugawa
- Department of Future Basic Medicine, Nara Medical University, Kashihara, Nara, Japan
- Department of Neurology, Nara Medical University, Kashihara, Nara, Japan
| | - Kazuma Sugie
- Department of Neurology, Nara Medical University, Kashihara, Nara, Japan
| | - Masahiro Eriguchi
- Department of Nephrology, Nara Medical University, Kashihara, Nara, Japan
| | - Kazuhiko Tsuruya
- Department of Nephrology, Nara Medical University, Kashihara, Nara, Japan
| | - Hiroki Kuniyasu
- Department of Molecular Pathology, Nara Medical University, Kashihara, Nara, Japan
| | - Shushi Nagamori
- Center for SI Medical Research, The Jikei University School of Medicine, Tokyo, Japan.
- Department of Laboratory Medicine, The Jikei University School of Medicine, Tokyo, Japan.
- Department of Collaborative Research for Bio-Molecular Dynamics, Nara Medical University, Kashihara, Nara, Japan.
| | - Eiichiro Mori
- Department of Future Basic Medicine, Nara Medical University, Kashihara, Nara, Japan.
- V-iCliniX Laboratory, Nara Medical University, Kashihara, Nara, Japan.
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Al Abri M, Alfoudari A, Mohammad Z, Almathen F, Al-Marzooqi W, Al-Hajri S, Al-Amri M, Bahbahani H. Assessing genetic diversity and defining signatures of positive selection on the genome of dromedary camels from the southeast of the Arabian Peninsula. Front Vet Sci 2023; 10:1296610. [PMID: 38098998 PMCID: PMC10720651 DOI: 10.3389/fvets.2023.1296610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2023] [Accepted: 11/17/2023] [Indexed: 12/17/2023] Open
Abstract
Dromedary camels (Camelus dromedarius) are members of the Camelini tribe within the Camelidae family. They are distributed throughout North Africa, the Arabian Peninsula and Southeast Asia. This domestic species is characterized by its superior adaptability to the harsh desert environment. In this study, whole autosomal data of 29 dromedary samples from the Southeast Arabian Peninsula in Oman; 10 from Muscat, 14 from Al-Batinah, and 5 from Al-Sharqiya, were investigated to assess their genetic relationship and to define candidate signatures of positive selection. A minimal genetic distinction that separates Muscat dromedaries from the other two populations was observed, with a degree of genetic admixture between them. Using the de-correlated composite of multiple signals (DCMS) approach, a total of 47 candidate regions within the autosomes of these dromedary populations were defined with signatures of positive selection. These candidate regions harbor a total of 154 genes that are mainly associated with functional categories related to immune response, lipid metabolism and energy expenditure, optical and auditory functions, and long-term memory. Different functional genomic variants were called on the candidate regions and respective genes that warrant further investigation to find possible association with the different favorable phenotypes in dromedaries. The output of this study paves the way for further research efforts aimed at defining markers for use in genomic breeding programs, with the goal of conserving the genetic diversity of the species and enhancing its productivity.
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Affiliation(s)
- Mohammad Al Abri
- Department of Animal and Veterinary Sciences, Sultan Qaboos University, Muscat, Oman
| | - Ahmad Alfoudari
- Department of Biological Sciences, Faculty of Science, Kuwait University, Safat, Kuwait
| | - Zainab Mohammad
- Department of Biological Sciences, Faculty of Science, Kuwait University, Safat, Kuwait
| | - Faisal Almathen
- Department of Veterinary Public Health and Animal Husbandry, College of Veterinary Medicine, King Faisal University, Al-Ahsa, Saudi Arabia
- Camel Research Center, King Faisal University, Al-Ahsa, Saudi Arabia
| | - Waleed Al-Marzooqi
- Department of Animal and Veterinary Sciences, Sultan Qaboos University, Muscat, Oman
| | - Salim Al-Hajri
- Laboratories and Research Administration, Directorate General of Veterinary Services, Royal Court Affairs, Muscat, Oman
| | - Mahmood Al-Amri
- Laboratories and Research Administration, Directorate General of Veterinary Services, Royal Court Affairs, Muscat, Oman
| | - Hussain Bahbahani
- Department of Biological Sciences, Faculty of Science, Kuwait University, Safat, Kuwait
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Nigam SK, Granados JC. OAT, OATP, and MRP Drug Transporters and the Remote Sensing and Signaling Theory. Annu Rev Pharmacol Toxicol 2023; 63:637-660. [PMID: 36206988 DOI: 10.1146/annurev-pharmtox-030322-084058] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
The coordinated movement of organic anions (e.g., drugs, metabolites, signaling molecules, nutrients, antioxidants, gut microbiome products) between tissues and body fluids depends, in large part, on organic anion transporters (OATs) [solute carrier 22 (SLC22)], organic anion transporting polypeptides (OATPs) [solute carrier organic (SLCO)], and multidrug resistance proteins (MRPs) [ATP-binding cassette, subfamily C (ABCC)]. Depending on the range of substrates, transporters in these families can be considered multispecific, oligospecific, or (relatively) monospecific. Systems biology analyses of these transporters in the context of expression patterns reveal they are hubs in networks involved in interorgan and interorganismal communication. The remote sensing and signaling theory explains how the coordinated functions of drug transporters, drug-metabolizing enzymes, and regulatory proteins play a role in optimizing systemic and local levels of important endogenous small molecules. We focus on the role of OATs, OATPs, and MRPs in endogenous metabolism and how their substrates (e.g., bile acids, short chain fatty acids, urate, uremic toxins) mediate interorgan and interorganismal communication and help maintain and restore homeostasis in healthy and disease states.
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Affiliation(s)
- Sanjay K Nigam
- Department of Pediatrics and Medicine (Nephrology), University of California San Diego, La Jolla, California, USA;
| | - Jeffry C Granados
- Department of Bioengineering, University of California San Diego, La Jolla, California, USA
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Yang B, Xin M, Liang S, Xu X, Cai T, Dong L, Wang C, Wang M, Cui Y, Song X, Sun J, Sun W. New insight into the management of renal excretion and hyperuricemia: Potential therapeutic strategies with natural bioactive compounds. Front Pharmacol 2022; 13:1026246. [PMID: 36483739 PMCID: PMC9723165 DOI: 10.3389/fphar.2022.1026246] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Accepted: 10/26/2022] [Indexed: 10/05/2023] Open
Abstract
Hyperuricemia is the result of increased production and/or underexcretion of uric acid. Hyperuricemia has been epidemiologically associated with multiple comorbidities, including metabolic syndrome, gout with long-term systemic inflammation, chronic kidney disease, urolithiasis, cardiovascular disease, hypertension, rheumatoid arthritis, dyslipidemia, diabetes/insulin resistance and increased oxidative stress. Dysregulation of xanthine oxidoreductase (XOD), the enzyme that catalyzes uric acid biosynthesis primarily in the liver, and urate transporters that reabsorb urate in the renal proximal tubules (URAT1, GLUT9, OAT4 and OAT10) and secrete urate (ABCG2, OAT1, OAT3, NPT1, and NPT4) in the renal tubules and intestine, is a major cause of hyperuricemia, along with variations in the genes encoding these proteins. The first-line therapeutic drugs used to lower serum uric acid levels include XOD inhibitors that limit uric acid biosynthesis and uricosurics that decrease urate reabsorption in the renal proximal tubules and increase urate excretion into the urine and intestine via urate transporters. However, long-term use of high doses of these drugs induces acute kidney disease, chronic kidney disease and liver toxicity. Therefore, there is an urgent need for new nephroprotective drugs with improved safety profiles and tolerance. The current systematic review summarizes the characteristics of major urate transporters, the mechanisms underlying the pathogenesis of hyperuricemia, and the regulation of uric acid biosynthesis and transport. Most importantly, this review highlights the potential mechanisms of action of some naturally occurring bioactive compounds with antihyperuricemic and nephroprotective potential isolated from various medicinal plants.
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Affiliation(s)
- Bendong Yang
- School of Life Sciences and Medicine, Shandong University of Technology, Zibo, China
| | - Meiling Xin
- School of Life Sciences and Medicine, Shandong University of Technology, Zibo, China
| | - Shufei Liang
- School of Life Sciences and Medicine, Shandong University of Technology, Zibo, China
| | - Xiaoxue Xu
- School of Life Sciences and Medicine, Shandong University of Technology, Zibo, China
| | - Tianqi Cai
- School of Life Sciences and Medicine, Shandong University of Technology, Zibo, China
| | - Ling Dong
- School of Life Sciences and Medicine, Shandong University of Technology, Zibo, China
| | - Chao Wang
- School of Life Sciences and Medicine, Shandong University of Technology, Zibo, China
| | - Meng Wang
- School of Life Sciences and Medicine, Shandong University of Technology, Zibo, China
| | - Yuting Cui
- School of Life Sciences and Medicine, Shandong University of Technology, Zibo, China
| | - Xinhua Song
- School of Life Sciences and Medicine, Shandong University of Technology, Zibo, China
- Shandong Qingyujiangxing Biotechnology Co., Ltd., Zibo, China
| | - Jinyue Sun
- Key Laboratory of Novel Food Resources Processing, Ministry of Agriculture and Rural Affairs/Key Laboratory of Agro-Products Processing Technology of Shandong Province/Institute of Agro-Food Science and Technology, Shandong Academy of Agricultural Sciences, Jinan, China
| | - Wenlong Sun
- School of Life Sciences and Medicine, Shandong University of Technology, Zibo, China
- Shandong Qingyujiangxing Biotechnology Co., Ltd., Zibo, China
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10
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Biolo G, Vinci P, Mangogna A, Landolfo M, Schincariol P, Fiotti N, Mearelli F, Di Girolamo FG. Mechanism of action and therapeutic use of bempedoic acid in atherosclerosis and metabolic syndrome. Front Cardiovasc Med 2022; 9:1028355. [PMID: 36386319 PMCID: PMC9650075 DOI: 10.3389/fcvm.2022.1028355] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Accepted: 10/12/2022] [Indexed: 08/13/2023] Open
Abstract
Bempedoic acid is a new cholesterol-lowering drug, which has recently received US FDA and EMA approval. This drug targets lipid and glucose metabolism as well as inflammation via downregulation of ATP-citrate lyase and upregulation of AMP-activated protein kinase (AMPK). The primary effect is the reduction of cholesterol synthesis in the liver and its administration is generally not associated to unwanted muscle effects. Suppression of hepatic fatty acid synthesis leads to decreased triglycerides and, possibly, improved non-alcoholic fatty liver disease. Bempedoic acid may decrease gluconeogenesis leading to improved insulin sensitivity, glucose metabolism, and metabolic syndrome. The anti-inflammatory action of bempedoic acid is mainly achieved via activation of AMPK pathway in the immune cells, leading to decreased plasma levels of C-reactive protein. Effects of bempedoic acid on atherosclerotic cardiovascular disease, type 2 diabetes and chronic liver disease have been assessed in randomized clinical trials but require further confirmation. Safety clinical trials in phase III indicate that bempedoic acid administration is generally well-tolerated in combination with statins, ezetimibe, or proprotein convertase subtilisin/kexin type 9 (PCSK9) inhibitors to achieve low-density lipoprotein cholesterol targets. The aim of this narrative review on bempedoic acid is to explore the underlying mechanisms of action and potential clinical targets, present existing evidence from clinical trials, and describe practical management of patients.
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Affiliation(s)
- Gianni Biolo
- Medical Clinic, Department of Medical, Surgical and Health Sciences, Cattinara Hospital, University of Trieste, Trieste, Italy
| | - Pierandrea Vinci
- Medical Clinic, Department of Medical, Surgical and Health Sciences, Cattinara Hospital, University of Trieste, Trieste, Italy
| | - Alessandro Mangogna
- Institute for Maternal and Child Health – IRCCS “Burlo Garofolo”, Trieste, Italy
| | - Matteo Landolfo
- Medical Clinic, Department of Medical, Surgical and Health Sciences, Cattinara Hospital, University of Trieste, Trieste, Italy
| | - Paolo Schincariol
- Hospital Pharmacy, Cattinara Hospital, Azienda Sanitaria Universitaria Giuliano Isontina, Trieste, Italy
| | - Nicola Fiotti
- Medical Clinic, Department of Medical, Surgical and Health Sciences, Cattinara Hospital, University of Trieste, Trieste, Italy
| | - Filippo Mearelli
- Medical Clinic, Department of Medical, Surgical and Health Sciences, Cattinara Hospital, University of Trieste, Trieste, Italy
| | - Filippo Giorgio Di Girolamo
- Medical Clinic, Department of Medical, Surgical and Health Sciences, Cattinara Hospital, University of Trieste, Trieste, Italy
- Hospital Pharmacy, Cattinara Hospital, Azienda Sanitaria Universitaria Giuliano Isontina, Trieste, Italy
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11
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Ryu S, Woody N, Chang G, Mathialagan S, Varma MVS. Identification of Organic Anion Transporter 2 Inhibitors: Screening, Structure-Based Analysis, and Clinical Drug Interaction Risk Assessment. J Med Chem 2022; 65:14578-14588. [PMID: 36270005 DOI: 10.1021/acs.jmedchem.2c01079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Organic anion transporter 2 (OAT2 or SLC22A7) plays an important role in the hepatic uptake and renal secretion of several endogenous compounds and drugs. The goal of this work is to understand the structure activity of OAT2 inhibition and assess clinical drug interaction risk. A single-point inhibition assay using OAT2-transfected HEK293 cells was employed to screen about 150 compounds; and concentration-dependent inhibition potency (IC50) was measured for the identified "inhibitors". Acids represented about 65% of all inhibitors, and the frequency of bases-plus-zwitterions approximately doubled for "non-inhibitors". Interestingly, 9 of 10 most potent inhibitors (low IC50) are acids (pKa ∼ 3-5). Additionally, inhibitors are significantly larger and lipophilic than non-inhibitors. In silico (binary) models were developed to identify inhibitors and non-inhibitors. Finally, in vivo risk assessed via static drug-drug interaction models identified several inhibitors with potential for renal and hepatic OAT2 inhibition at clinical doses. This is the first study assessing the global pattern of OAT2-ligand interactions.
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Affiliation(s)
- Sangwoo Ryu
- Medicine Design, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Nathaniel Woody
- Medicine Design, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - George Chang
- Medicine Design, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Sumathy Mathialagan
- Medicine Design, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
| | - Manthena V S Varma
- Medicine Design, Pfizer Worldwide Research and Development, Eastern Point Road, Groton, Connecticut 06340, United States
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12
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Ruscica M, Sirtori CR, Carugo S, Banach M, Corsini A. Bempedoic Acid: for Whom and When. Curr Atheroscler Rep 2022; 24:791-801. [PMID: 35900636 PMCID: PMC9474414 DOI: 10.1007/s11883-022-01054-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/05/2022] [Indexed: 12/21/2022]
Abstract
PURPOSE OF REVIEW The aim of creating an orally active non-statin cholesterol-lowering drug was achieved with bempedoic acid, a small linear molecule providing both a significant low-density lipoprotein cholesterol (LDL-C) reduction and an anti-inflammatory effect by decreasing high-sensitivity C-reactive protein. Bempedoic acid antagonizes ATP citrate-lyase, a cytosolic enzyme upstream of HMGCoA reductase which is the rate-limiting step of cholesterol biosynthesis. Bempedoic acid is a pro-drug converted to its active metabolite by very-long-chain acyl-CoA synthetase 1 which is present mostly in the liver and absent in skeletal muscles. This limits the risk of myalgia and myopathy. The remit of this review is to give clinical insights on the safety and efficacy of bempedoic acid and to understand for whom it should be prescribed. RECENT FINDINGS Bempedoic acid with a single daily dose (180 mg) reduces LDL-C by a mean 24.5% when given alone, by 18% when given on top of a major statin and by 38-40% when given in a fixed-dose combination with ezetimibe. Bempedoic acid does not lead to the risk of new-onset diabetes, and moderately improves the glycaemic profile. The extensive knowledge on bempedoic acid mechanism, metabolism and side effects has led to an improved understanding of the potential benefits of this agent and offers a possible alternative to cardiologists and clinical practitioners somewhat worn out today by the occurrence of the muscular side effects of statins.
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Affiliation(s)
- Massimiliano Ruscica
- Department of Pharmacological and Biomolecular Sciences, Università Degli Studi Di Milano, Milan, Italy.
| | - Cesare R Sirtori
- Department of Pharmacological and Biomolecular Sciences, Università Degli Studi Di Milano, Milan, Italy
| | - Stefano Carugo
- Department of Clinical Sciences and Community Health, Università Degli Studi Di Milano, Milan, Italy.,Fondazione Ospedale Maggiore IRCCS Policlinico Di Milano, Milan, Italy
| | - Maciej Banach
- Department of Preventive Cardiology and Lipidology, Medical University of Lodz, 93-338, Lodz, Poland.,Cardiovascular Research Centre, University of Zielona Gora, 65-046, Zielona Gora, Poland
| | - Alberto Corsini
- Department of Pharmacological and Biomolecular Sciences, Università Degli Studi Di Milano, Milan, Italy
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13
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Toyoda Y, Kawamura Y, Nakayama A, Morimoto K, Shimizu S, Tanahashi Y, Tamura T, Kondo T, Kato Y, Ichida K, Suzuki H, Shinomiya N, Kobayashi Y, Takada T, Matsuo H. OAT10/SLC22A13 Acts as a Renal Urate Re-Absorber: Clinico-Genetic and Functional Analyses With Pharmacological Impacts. Front Pharmacol 2022; 13:842717. [PMID: 35462902 PMCID: PMC9019507 DOI: 10.3389/fphar.2022.842717] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Accepted: 02/09/2022] [Indexed: 01/23/2023] Open
Abstract
Dysfunctional missense variant of organic anion transporter 10 (OAT10/SLC22A13), rs117371763 (c.1129C>T; p.R377C), is associated with a lower susceptibility to gout. OAT10 is a urate transporter; however, its physiological role in urate handling remains unclear. We hypothesized that OAT10 could be a renal urate re-absorber that will be a new molecular target of urate-lowering therapy like urate transporter 1 (URAT1, a physiologically-important well-known renal urate re-absorber) and aimed to examine the effect of OAT10 dysfunction on renal urate handling. For this purpose, we conducted quantitative trait locus analyses of serum urate and fractional excretion of uric acid (FEUA) using samples obtained from 4,521 Japanese males. Moreover, we performed immunohistochemical and functional analyses to assess the molecular properties of OAT10 as a renal urate transporter and evaluated its potential interaction with urate-lowering drugs. Clinico-genetic analyses revealed that carriers with the dysfunctional OAT10 variant exhibited significantly lower serum urate levels and higher FEUA values than the non-carriers, indicating that dysfunction of OAT10 increases renal urate excretion. Given the results of functional assays and immunohistochemical analysis demonstrating the expression of human OAT10 in the apical side of renal proximal tubular cells, our data indicate that OAT10 is involved in the renal urate reabsorption in renal proximal tubules from urine. Additionally, we found that renal OAT10 inhibition might be involved in the urate-lowering effect of losartan and lesinurad which exhibit uricosuric effects; indeed, losartan, an approved drug, inhibits OAT10 more strongly than URAT1. Accordingly, OAT10 can be a novel potential molecular target for urate-lowering therapy.
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Affiliation(s)
- Yu Toyoda
- Department of Pharmacy, The University of Tokyo Hospital, Tokyo, Japan
- Department of Integrative Physiology and Bio-Nano Medicine, National Defense Medical College, Saitama, Japan
| | - Yusuke Kawamura
- Department of Integrative Physiology and Bio-Nano Medicine, National Defense Medical College, Saitama, Japan
| | - Akiyoshi Nakayama
- Department of Integrative Physiology and Bio-Nano Medicine, National Defense Medical College, Saitama, Japan
| | - Keito Morimoto
- Department of Pharmacy, The University of Tokyo Hospital, Tokyo, Japan
| | - Seiko Shimizu
- Department of Integrative Physiology and Bio-Nano Medicine, National Defense Medical College, Saitama, Japan
| | - Yuki Tanahashi
- Department of Integrative Physiology and Bio-Nano Medicine, National Defense Medical College, Saitama, Japan
| | - Takashi Tamura
- Department of Preventive Medicine, Nagoya University Graduate School of Medicine, Aichi, Japan
| | - Takaaki Kondo
- Program in Radiological and Medical Laboratory Sciences, Pathophysiological Laboratory Science, Nagoya University Graduate School of Medicine, Aichi, Japan
| | - Yasufumi Kato
- Department of Preventive Medicine, Nagoya University Graduate School of Medicine, Aichi, Japan
| | - Kimiyoshi Ichida
- Department of Pathophysiology, Tokyo University of Pharmacy and Life Sciences, Tokyo, Japan
| | - Hiroshi Suzuki
- Department of Pharmacy, The University of Tokyo Hospital, Tokyo, Japan
| | - Nariyoshi Shinomiya
- Department of Integrative Physiology and Bio-Nano Medicine, National Defense Medical College, Saitama, Japan
| | - Yasushi Kobayashi
- Department of Anatomy and Neurobiology, National Defense Medical College, Saitama, Japan
| | - Tappei Takada
- Department of Pharmacy, The University of Tokyo Hospital, Tokyo, Japan
- *Correspondence: Tappei Takada, ; Hirotaka Matsuo,
| | - Hirotaka Matsuo
- Department of Integrative Physiology and Bio-Nano Medicine, National Defense Medical College, Saitama, Japan
- *Correspondence: Tappei Takada, ; Hirotaka Matsuo,
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14
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Han X, Song D. Using a Machine Learning Approach to Identify Key Biomarkers for Renal Clear Cell Carcinoma. Int J Gen Med 2022; 15:3541-3558. [PMID: 35392028 PMCID: PMC8980298 DOI: 10.2147/ijgm.s351168] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Accepted: 03/15/2022] [Indexed: 11/23/2022] Open
Abstract
Background The most common and deadly subtype of renal carcinoma is kidney renal clear cell carcinoma (KIRC), which accounts for approximately 75% of renal carcinoma. However, the main cause of death in KIRC patients is tumor metastasis. There are no obvious clinical features in the early stage of kidney cancer, and 25–30% of patients have already metastasized when they are first diagnosed. Moreover, KIRC patients whose local tumors have been removed by nephrectomy are still at high risk of metastasis and recurrence and are not sensitive to chemotherapy and radiotherapy, leading to poor prognosis. Therefore, early diagnosis and treatment of this disease are very important. Methods KIRC-related patient datasets were downloaded from the GEO database and TCGA database. DEG screening and GO, KEGG and GSEA enrichment analysis was firstly conducted and then the LASSO and support vector machine (SVM) RFE algorithms were adopted to identify KIRC-associated key genes in training sets and validate them in the test set. The clinical prognostic analysis including the association between the expression of key genes and the overall survival, stage, grade across KIRC, the immune infiltration difference between normal samples and cancer samples, the correlation between the key genes and immune cells, immunomodulator, immune subtypes of KIRC were investigated in this research. Results We finally screened out 4 key genes, including ACPP, ANGPTL4, SCNN1G, SLC22A7. The expression of key genes show difference among normal samples and tumor samples, SCNN1G and SLC22A7 could be predictor of prognosis of patients. The expression of key genes was related with the abundance of tumor infiltration immune cells and the gene expression of immune checkpoint. Conclusion This study screened the 4 key genes, which contributed to early diagnosis, prognosis assessment and immune target treatment of patients with KIRC.
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Affiliation(s)
- Xiaying Han
- Department of Orthopedics, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200080, People’s Republic of China
- Shanghai Bone Tumor Institution, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200080, People’s Republic of China
| | - Dianwen Song
- Department of Orthopedics, Shanghai General Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200080, People’s Republic of China
- Correspondence: Dianwen Song, Email
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15
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Xie Q, Cai X, Dong X, Wang Y, Sun M, Tai L, Xu Y. Effects of epigallocatechin-3-gallate combined with ascorbic acid and glycerol on the stability and uric acid-lowering activity of epigallocatechin-3-gallate. PHARMACEUTICAL BIOLOGY 2021; 59:157-166. [PMID: 33556300 PMCID: PMC8871600 DOI: 10.1080/13880209.2021.1878235] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 01/05/2021] [Accepted: 01/14/2021] [Indexed: 06/12/2023]
Abstract
CONTEXT Epigallocatechin-3-gallate (EGCG) is unstable and easily oxidized, which limits its applications. Ascorbic acid (Vc) is a natural antioxidant. OBJECTIVE The effects of EGCG combined with Vc and glycerol on stability and uric acid-lowering activity of EGCG were examined. MATERIALS AND METHODS EGCG (aqueous solution), EGCG + Vc (aqueous solution), EGCG (glycerol solution) and EGCG + Vc (glycerol solution) were prepared and incubated under different conditions in vitro. The recovery rate of EGCG was calculated by HPLC. Kunming mice were randomly divided into normal control group, model group, allopurinol (5 mg/kg), EGCG (10 mg/kg), EGCG + Vc (both 10 mg/kg), EGCG (10 mg/kg) + glycerol (60%), and EGCG (10 mg/kg) + Vc (10 mg/kg) + glycerol (60%) (n = 6). Allopurinol was injected intraperitoneally to mice, others were administered intragastrically to (2 cases) mice. All mice were continuously administrated for 7 days, once a day. RESULTS EGCG recovery rates of EGCG group and EGCG + Vc + glycerol group respectively reached to 32.34 ± 1.86% and 98.90 ± 0.64% when they were incubated for 4 h at 80 °C. EGCG recovery rates reached to 91.82 ± 5.13% (incubated for 6 h at pH 8) and 88.85 ± 2.63% (incubated for 4 h in simulated intestinal fluid) when EGCG incubated with Vc and glycerol. Compared with the model group, UA values of EGCG + Vc + glycerol group reduced by 43.49% while EGCG group reduced by 25.63%. The activities of xanthine oxidase (XOD, 31.41 U/gprot) and adenosine deaminase (ADA, 10.05 U/mgprot), and the mRNA expression levels of glucose transporter 9 (GLUT9, 1.03) and urate transporter 1 (URAT1, 0.44) in EGCG + Vc + glycerol group were notably lower than those of EGCG group (38.12 U/gprot, 13.16 U/mgprot, 1.54, and 0.55). The mRNA expression levels of ATP-binding cassette superfamily G member 2 (ABCG2, 1.39) and organic anion transport 1/2 (OAT1/2, 2.34, 2.53) in EGCG + Vc + glycerol group were notably higher than those of EGCG group (0.57, 1.13, and 1.16). DISCUSSION AND CONCLUSIONS Our findings suggest that when EGCG used in combination with Vc and glycerol could effectively increase its biology activities and can be generalized to the broader pharmacological studies. This sheds light on the development and application of EGCG in the fields of food and medicine.
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Affiliation(s)
- Qianjin Xie
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, China
- International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, Hefei, China
| | - Xiaqiang Cai
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, China
- International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, Hefei, China
| | - Xu Dong
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, China
- International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, Hefei, China
| | - Ying Wang
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, China
- International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, Hefei, China
| | - Minghui Sun
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, China
- International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, Hefei, China
| | - Lingling Tai
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, China
- International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, Hefei, China
| | - Yan Xu
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, China
- International Joint Laboratory on Tea Chemistry and Health Effects of Ministry of Education, Hefei, China
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Sun C, Lin S, Li Z, Liu H, Liu Y, Wang K, Zhu T, Li G, Yin B, Wan R. iTRAQ-based quantitative proteomic analysis reveals the toxic mechanism of diclofenac sodium on the kidney of broiler chicken. Comp Biochem Physiol C Toxicol Pharmacol 2021; 249:109129. [PMID: 34229076 DOI: 10.1016/j.cbpc.2021.109129] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 06/30/2021] [Accepted: 06/30/2021] [Indexed: 12/20/2022]
Abstract
Diclofenac sodium (DS) is one of the nonsteroidal anti-inflammatory drugs (NSAIDs), which exhibits potent toxicity to birds. To search the molecular mechanism of DS induced nephrotoxicity in broiler chicken, 20 apparently healthy 30-day old broiler chickens were separated randomly into two groups (n = 10): Group A was kept as control while DS was administered at the dose rate of 10 mg/kg body weight in group B through oral gavage. Kidney samples were collected, and the proteins were identified and quantified by iTRAQ. 434 differentially expressed proteins (DEPs) were screened, including 277 up-regulated DEPs and 157 down-regulated DEPs. The functional annotation and classification results indicated that DEPs were significantly enriched in apoptosis and metabolism-related pathways via GO and KEGG analysis. Compared with the control group, the most significant enrichment pathways are "ribosome", "metabolic pathways" and "protein processing in endoplasmic reticulum". Based on the proteomic results and relevant literature, some DEPs that potentially related to the toxicity of DS were screened. The mRNA transcript levels of these DEPs were characterized by qRT-PCR, and the results showed that Slc22a7, Gatm, Glud1, Agxt2 and Gldc were significantly down-regulated, while Gsl, Gpt2 and Asns were significantly up-regulated. We speculate that the toxic mechanism of DS to chicken might be that it induces kidney cell apoptosis, interferes with purine metabolism and inhibits the expression of OAT2. The current study provides a reference for elucidating the nephrotoxic mechanism of diclofenac sodium to broiler chicken from the molecular perspective.
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Affiliation(s)
- Chuanxi Sun
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Taian 271001, Shandong, China; Institute of Poultry Science, Shandong Academy of Agricultural Science, Jinan 250100, Shandong, China
| | - Shuqian Lin
- Institute of Poultry Science, Shandong Academy of Agricultural Science, Jinan 250100, Shandong, China; Shandong Provincial Animal and Poultry Green Health Products Creation Engineering Laboratory, Jinan 250100, Shandong, China
| | - Zhen Li
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Taian 271001, Shandong, China; Institute of Poultry Science, Shandong Academy of Agricultural Science, Jinan 250100, Shandong, China
| | - Huazheng Liu
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Taian 271001, Shandong, China
| | - Yixin Liu
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Taian 271001, Shandong, China
| | - Keke Wang
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Taian 271001, Shandong, China
| | - Tianyi Zhu
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Taian 271001, Shandong, China
| | - Guiming Li
- Institute of Poultry Science, Shandong Academy of Agricultural Science, Jinan 250100, Shandong, China; Shandong Provincial Animal and Poultry Green Health Products Creation Engineering Laboratory, Jinan 250100, Shandong, China
| | - Bin Yin
- Institute of Poultry Science, Shandong Academy of Agricultural Science, Jinan 250100, Shandong, China; Shandong Provincial Animal and Poultry Green Health Products Creation Engineering Laboratory, Jinan 250100, Shandong, China.
| | - Renzhong Wan
- College of Animal Science and Veterinary Medicine, Shandong Agricultural University, Taian 271001, Shandong, China.
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Ballantyne CM, Bays H, Catapano AL, Goldberg A, Ray KK, Saseen JJ. Role of Bempedoic Acid in Clinical Practice. Cardiovasc Drugs Ther 2021; 35:853-864. [PMID: 33818688 PMCID: PMC8266788 DOI: 10.1007/s10557-021-07147-5] [Citation(s) in RCA: 64] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/19/2021] [Indexed: 12/14/2022]
Abstract
Many patients do not achieve optimal low-density lipoprotein cholesterol (LDL-C) levels with statins alone; others are unable to tolerate statin therapy. Additional non-statin treatment options including ezetimibe, proprotein convertase subtilisin/kexin type 9 inhibitors, and bile acid sequestrants are often necessary to further reduce the risk of atherosclerotic cardiovascular disease. This review provides practical guidance as to the use of bempedoic acid to lower LDL-C and includes direction as to which patients may benefit and advice for safety monitoring during treatment. Bempedoic acid, a new class of agent, is a prodrug converted to bempedoyl-CoA by very long-chain acyl-CoA synthetase 1, an enzyme with high expression in the liver but that is undetectable in the skeletal muscle. Bempedoic acid inhibits the enzyme adenosine triphosphate (ATP)-citrate lyase, which lies two steps upstream from β-hydroxy β-methylglutaryl-CoA reductase in the cholesterol biosynthesis pathway. In clinical trials conducted in patients with or at risk for atherosclerotic cardiovascular disease or familial heterozygous hypercholesterolemia, bempedoic acid in combination with statins and/or ezetimibe significantly reduced LDL-C, apolipoprotein B, and high-sensitivity C-reactive protein compared with placebo. Bempedoic acid is generally well tolerated with no clinically meaningful increase in muscle-related symptoms relative to placebo, even in patients taking maximally tolerated statins. A small increase in serum uric acid (mean increase 0.8 mg/dL) is the most noteworthy adverse effect. Bempedoic acid provides an effective and generally well-tolerated medication to further reduce LDL-C in patients taking maximally tolerated statins or manage LDL-C levels in those who are unable to take statins. The potential for a reduced incidence of major cardiovascular events with bempedoic acid is being investigated in the CLEAR Outcomes trial, with results expected in 2023.
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Affiliation(s)
- Christie M Ballantyne
- Department of Medicine, Baylor College of Medicine, One Baylor Plaza, BCM 285, Houston, TX, 77030, USA.
| | - Harold Bays
- Louisville Metabolic and Atherosclerosis Research Center, Louisville, KY, USA
| | - Alberico L Catapano
- Department of Pharmacological and Biomolecular Sciences, University of Milan and IRCCS Multimedica, Milan, Italy
| | - Anne Goldberg
- Division of Endocrinology, Metabolism and Lipid Research, Washington University School of Medicine, St. Louis, MO, USA
| | - Kausik K Ray
- Department of Primary Care and Public Health, Imperial College London, London, UK
| | - Joseph J Saseen
- Departments of Clinical Pharmacy and Family Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
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Arakawa H, Amezawa N, Kawakatsu Y, Tamai I. Renal Reabsorptive Transport of Uric Acid Precursor Xanthine by URAT1 and GLUT9. Biol Pharm Bull 2021; 43:1792-1798. [PMID: 33132325 DOI: 10.1248/bpb.b20-00597] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Xanthine and hypoxanthine are intermediate metabolites of uric acid and a source of reactive oxidative species (ROS) by xanthine oxidoreductase (XOR), suggesting that facilitating their elimination is beneficial. Since they are reabsorbed in renal proximal tubules, we investigated their reabsorption mechanism by focusing on the renal uric acid transporters URAT1 and GLUT9, and examined the effect of clinically used URAT1 inhibitor on their renal clearance when their plasma concentration is increased by XOR inhibitor. Uptake study for [3H]xanthine and [3H]hypoxanthine was performed using URAT1- and GLUT9-expressing Xenopus oocytes. Transcellular transport study for [3H]xanthine was carried out using Madin-Darby canine kidney (MDCK)II cells co-expressing URAT1 and GLUT9. In in vivo pharmacokinetic study, renal clearance of xanthine was estimated based on plasma concentration and urinary recovery. Uptake by URAT1- and GLUT9-expressing oocytes demonstrated that xanthine is a substrate of URAT1 and GLUT9, while hypoxanthine is not. Transcellular transport of xanthine in MDCKII cells co-expressing URAT1 and GLUT9 was significantly higher than those in mock cells and cells expressing URAT1 or GLUT9 alone. Furthermore, dotinurad, a URAT1 inhibitor, increased renal clearance of xanthine in rats treated with topiroxostat to inhibit XOR. It was suggested that xanthine is reabsorbed in the same manner as uric acid through URAT1 and GLUT9, while hypoxanthine is not. Accordingly, it is expected that treatment with XOR and URAT1 inhibitors will effectively decrease purine pools in the body and prevent cell injury due to ROS generated during XOR-mediated reactions.
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Affiliation(s)
- Hiroshi Arakawa
- Faculty of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University
| | - Natsumi Amezawa
- Faculty of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University
| | - Yu Kawakatsu
- Faculty of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University
| | - Ikumi Tamai
- Faculty of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University
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Leask MP, Sumpter NA, Lupi AS, Vazquez AI, Reynolds RJ, Mount DB, Merriman TR. The Shared Genetic Basis of Hyperuricemia, Gout, and Kidney Function. Semin Nephrol 2020; 40:586-599. [DOI: 10.1016/j.semnephrol.2020.12.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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20
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Bempedoic acid safety analysis: Pooled data from four phase 3 clinical trials. J Clin Lipidol 2020; 14:649-659.e6. [PMID: 32980290 DOI: 10.1016/j.jacl.2020.08.009] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 08/14/2020] [Accepted: 08/24/2020] [Indexed: 01/05/2023]
Abstract
BACKGROUND An ongoing need exists for safe and effective lipid-lowering therapies (LLTs) for patients unable to achieve desired lipid levels with current treatment options. OBJECTIVE The objective of this study was to describe the safety profile of bempedoic acid, an oral, first-in-class, adenosine triphosphate (ATP)-citrate lyase inhibitor that significantly reduces low-density lipoprotein cholesterol (LDL-C) levels by 17.4%-28.5% vs placebo. METHODS This was a pooled analysis of four phase 3, randomized (2:1), double-blind, placebo-controlled studies in patients with hypercholesterolemia who required additional LDL-C lowering, despite stable maximally-tolerated LLT. Patients received 180 mg of bempedoic acid (n = 2424) or placebo (n = 1197) once daily for 12 to 52 weeks. Assessments included treatment-emergent adverse events (TEAEs) and clinical laboratory tests. RESULTS Of 3621 patients (the median drug exposure: 363 days), exposure-adjusted TEAE rates were 87.1/100 and 82.9/100 person-years (PY) for bempedoic acid and placebo, respectively. No single TEAE influenced the difference in rates. TEAEs leading to discontinuation occurred at rates of 13.4/100 and 8.9/100 PY for bempedoic acid vs placebo, with the most common cause being myalgia, which occurred less frequently with bempedoic acid vs placebo (1.5/100 vs 2.0/100 PY). Rates of myalgia and muscle weakness were comparable vs placebo. Bempedoic acid was associated with mild increases in blood urea nitrogen, creatinine, and uric acid and decreases in hemoglobin. These laboratory abnormalities were apparent by week 4, stable over time, and reversible after treatment cessation. Gout incidence was 1.6/100 vs 0.5/100 PY in the bempedoic acid vs placebo groups. New-onset diabetes/hyperglycemia occurred less frequently with bempedoic acid vs placebo (4.7/100 vs 6.4/100 PY). The safety profile was consistent across subgroups. CONCLUSIONS Bempedoic acid is generally safe and well tolerated among patients with hypercholesterolemia who require additional LLT.
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Wada S, Matsunaga N, Tamai I. Mathematical modeling analysis of hepatic uric acid disposition using human sandwich-cultured hepatocytes. Drug Metab Pharmacokinet 2020; 35:432-440. [PMID: 32807664 DOI: 10.1016/j.dmpk.2020.06.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2020] [Revised: 05/24/2020] [Accepted: 06/15/2020] [Indexed: 12/14/2022]
Abstract
Uric acid is biosynthesized from purine by xanthine oxidase (XO) mainly in the liver and is excreted into urine and feces. Although several transporters responsible for renal and intestinal handling of uric acid have been reported, information on hepatic transporters is limited. In the present study, we studied quantitative contribution of transporters for hepatic handling of uric acid by mathematical modeling analysis in human sandwich-cultured hepatocytes (hSCH). Stable isotope-labeled hypoxanthine, hypoxanthine-13C2,15N (HX), was incubated with hSCH and formed 13C2,15N-labeled xanthine (XA) and uric acid (UA) were measured by LC-MS/MS time dependently. Rate constants for metabolism and efflux and uptake transport across sinusoidal and bile canalicular membranes of HX, XA and UA were estimated in the presence of inhibitors of XO and uric acid transporters. An XO inhibitor allopurinol significantly decreased metabolisms of HX and XA. Efflux into bile canalicular lumen was negligible and sinusoidal efflux was considered main efflux pathway of formed UA. Transporter inhibition study highlighted that GLUT9 strongly and MRP4 intermediately contribute to the sinusoidal efflux of UA with minor contribution of NPT1/4. Modeling analysis developed in the present study should be useful for quantitative prediction of uric acid disposition in liver.
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Affiliation(s)
- Sho Wada
- Faculty of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Japan
| | - Norikazu Matsunaga
- Pharmacokinetic Research Laboratories, Ono Pharmaceutical Co., Ltd., Japan
| | - Ikumi Tamai
- Faculty of Pharmaceutical Sciences, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Japan.
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Sex Differences in Urate Handling. Int J Mol Sci 2020; 21:ijms21124269. [PMID: 32560040 PMCID: PMC7349092 DOI: 10.3390/ijms21124269] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 06/11/2020] [Accepted: 06/12/2020] [Indexed: 02/07/2023] Open
Abstract
Hyperuricemia, or elevated serum urate, causes urate kidney stones and gout and also increases the incidence of many other conditions including renal disease, cardiovascular disease, and metabolic syndrome. As we gain mechanistic insight into how urate contributes to human disease, a clear sex difference has emerged in the physiological regulation of urate homeostasis. This review summarizes our current understanding of urate as a disease risk factor and how being of the female sex appears protective. Further, we review the mechanisms of renal handling of urate and the significant contributions from powerful genome-wide association studies of serum urate. We also explore the role of sex in the regulation of specific renal urate transporters and the power of new animal models of hyperuricemia to inform on the role of sex and hyperuricemia in disease pathogenesis. Finally, we advocate the use of sex differences in urate handling as a potent tool in gaining a further understanding of physiological regulation of urate homeostasis and for presenting new avenues for treating the constellation of urate related pathologies.
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The SLC Family Are Candidate Diagnostic and Prognostic Biomarkers in Clear Cell Renal Cell Carcinoma. BIOMED RESEARCH INTERNATIONAL 2020; 2020:1932948. [PMID: 32461965 PMCID: PMC7212275 DOI: 10.1155/2020/1932948] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2019] [Revised: 02/29/2020] [Accepted: 03/24/2020] [Indexed: 12/11/2022]
Abstract
Clear cell renal cell carcinoma (ccRCC) is the most common lethal subtype of renal cancer, and changes in tumor metabolism play a key role in its development. Solute carriers (SLCs) are important in the transport of small molecules in humans, and defects in SLC transporters can lead to serious diseases. The expression patterns and prognostic values of SLC family transporters in the development of ccRCC are still unclear. The current study analyzed the expression levels of SLC family members and their correlation with prognosis in ccRCC patients with data from Oncomine, Gene Expression Profiling Interactive Analysis (GEPIA), The Cancer Genome Atlas (TCGA), cBioPortal, the Human Protein Atlas (HPA), the International Cancer Genome Consortium (ICGC), and the Gene Expression Omnibus (GEO). We found that the mRNA expression levels of SLC22A6, SLC22A7, SLC22A13, SLC25A4, SLC34A1, and SLC44A4 were significantly lower in ccRCC tissues than in normal tissues and the protein expression levels of SLC22A6, SLC22A7, SLC22A13, and SLC34A1 were also significantly lower. Except for SLC22A7, the expression levels of SLC22A6, SLC22A13, SLC25A4, SLC34A1, and SLC44A4 were correlated with the clinical stage of ccRCC patients. The lower the expression levels of SLC22A6, SLC22A13, SLC25A4, SLC34A1, and SLC44A4 were, the later the clinical stage of ccRCC patients was. Further experiments revealed that the expression levels of SLC22A6, SLC22A7, SLC22A13, SLC25A4, SLC34A1, and SLC44A4 were significantly associated with overall survival (OS) and disease-free survival (DFS) in ccRCC patients. High SLC22A6, SLC22A7, SLC22A13, SLC25A4, SLC34A1, and SLC44A4 expression predicted improved OS and DFS. Finally, GSE53757 and ICGC were used to revalidate the differential expression and clinical prognostic value. This study suggests that SLC22A6, SLC22A7, SLC22A13, SLC25A4, SLC34A1, and SLC44A4 may be potential targets for the clinical diagnosis, prognosis, and treatment of ccRCC patients.
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25
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Ha YJ, Chung SW, Lee JH, Kang EH, Lee YJ, Song YW. Clinical features and risk factors for gout attacks during anti-tuberculosis treatment: A case-control study in South Korea. Int J Rheum Dis 2019; 22:1905-1911. [PMID: 31531949 DOI: 10.1111/1756-185x.13697] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2019] [Revised: 08/18/2019] [Accepted: 08/19/2019] [Indexed: 11/27/2022]
Abstract
AIM This study aimed to investigate the clinical features and risk factors of gout attacks during anti-tuberculosis (TB) treatment in South Korea. METHOD We investigated the clinical characteristics of 49 patients who suffered from gout attacks while taking anti-TB medications. Among them, 25 TB patients having newly developed gout attacks without prior history of gout were set to the gout group. Seventy-five age- and sex-matched TB patients without gout attacks during anti-TB therapy were randomly selected as the control group. The demographics, clinical features, and laboratory findings between the two groups were compared to establish risk factors of gout attack during anti-TB treatment. RESULTS The gout patients had a mean age of 67.7 ± 13.2 years and 39 patients (79.6%) were male. Approximately half of the patients experienced an attack within 2 months of treatment initiation. The attacks typically involved lower extremity joints (87.8%). The serum uric acid (SUA) levels were significantly elevated at 2 and 6 months after starting anti-TB medication compared with those at baseline. In the case-control study, the factors associated with gout attack were higher body mass index (BMI), higher pre-treatment SUA levels, dyslipidemia, and reduced renal function. In the multivariate model, higher BMI, chronic kidney disease (CKD), and pre-treatment hyperuricemia (SUA ≥ 6.8 mg/dL) were independent risk factors of gout attack while taking anti-TB medication. CONCLUSIONS Patients with high BMI, CKD, and pre-treatment hyperuricemia are at a higher risk of gout attack during TB treatment.
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Affiliation(s)
- You-Jung Ha
- Division of Rheumatology, Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Sang Wan Chung
- Division of Rheumatology, Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Jae Hyun Lee
- Division of Rheumatology, Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea
| | - Eun Ha Kang
- Division of Rheumatology, Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea
| | - Yun Jong Lee
- Division of Rheumatology, Department of Internal Medicine, Seoul National University Bundang Hospital, Seongnam, Korea.,Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea
| | - Yeong Wook Song
- Division of Rheumatology, Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea.,Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Korea.,Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology and College of Medicine, Medical Research Center, Seoul National University, Seoul, Korea
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Taniguchi T, Ashizawa N, Matsumoto K, Saito R, Motoki K, Sakai M, Chikamatsu N, Hagihara C, Hashiba M, Iwanaga T. Pharmacological Evaluation of Dotinurad, a Selective Urate Reabsorption Inhibitor. J Pharmacol Exp Ther 2019; 371:162-170. [DOI: 10.1124/jpet.119.259341] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Accepted: 07/16/2019] [Indexed: 11/22/2022] Open
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27
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Nakatochi M, Kanai M, Nakayama A, Hishida A, Kawamura Y, Ichihara S, Akiyama M, Ikezaki H, Furusyo N, Shimizu S, Yamamoto K, Hirata M, Okada R, Kawai S, Kawaguchi M, Nishida Y, Shimanoe C, Ibusuki R, Takezaki T, Nakajima M, Takao M, Ozaki E, Matsui D, Nishiyama T, Suzuki S, Takashima N, Kita Y, Endoh K, Kuriki K, Uemura H, Arisawa K, Oze I, Matsuo K, Nakamura Y, Mikami H, Tamura T, Nakashima H, Nakamura T, Kato N, Matsuda K, Murakami Y, Matsubara T, Naito M, Kubo M, Kamatani Y, Shinomiya N, Yokota M, Wakai K, Okada Y, Matsuo H. Genome-wide meta-analysis identifies multiple novel loci associated with serum uric acid levels in Japanese individuals. Commun Biol 2019; 2:115. [PMID: 30993211 PMCID: PMC6453927 DOI: 10.1038/s42003-019-0339-0] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 01/22/2019] [Indexed: 01/05/2023] Open
Abstract
Gout is a common arthritis caused by elevated serum uric acid (SUA) levels. Here we investigated loci influencing SUA in a genome-wide meta-analysis with 121,745 Japanese subjects. We identified 8948 variants at 36 genomic loci (P<5 × 10-8) including eight novel loci. Of these, missense variants of SESN2 and PNPLA3 were predicted to be damaging to the function of these proteins; another five loci-TMEM18, TM4SF4, MXD3-LMAN2, PSORS1C1-PSORS1C2, and HNF4A-are related to cell metabolism, proliferation, or oxidative stress; and the remaining locus, LINC01578, is unknown. We also identified 132 correlated genes whose expression levels are associated with SUA-increasing alleles. These genes are enriched for the UniProt transport term, suggesting the importance of transport-related genes in SUA regulation. Furthermore, trans-ethnic meta-analysis across our own meta-analysis and the Global Urate Genetics Consortium has revealed 15 more novel loci associated with SUA. Our findings provide insight into the pathogenesis, treatment, and prevention of hyperuricemia/gout.
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Affiliation(s)
- Masahiro Nakatochi
- Data Science Division, Data Coordinating Center, Department of Advanced Medicine, Nagoya University Hospital, Nagoya, 466-8560 Japan
| | - Masahiro Kanai
- Laboratory for Statistical Analysis, RIKEN Center for Integrative Medical Sciences, Yokohama, 230-0045 Japan
- Department of Statistical Genetics, Osaka University Graduate School of Medicine, Suita, 565-0871 Japan
- Department of Biomedical Informatics, Harvard Medical School, Boston, MA 02115 USA
| | - Akiyoshi Nakayama
- Department of Integrative Physiology and Bio-Nano Medicine, National Defense Medical College, Tokorozawa, 359-8513 Japan
- Medical Squadron, Air Base Group, Western Aircraft Control and Warning Wing, Japan Air Self-Defense Force, Kasuga, 816-0804 Japan
| | - Asahi Hishida
- Department of Preventive Medicine, Nagoya University Graduate School of Medicine, Nagoya, 466-8550 Japan
| | - Yusuke Kawamura
- Department of Integrative Physiology and Bio-Nano Medicine, National Defense Medical College, Tokorozawa, 359-8513 Japan
- Department of General Medicine, National Defense Medical College, Tokorozawa, 359-8513 Japan
| | - Sahoko Ichihara
- Department of Environmental and Preventive Medicine, Jichi Medical University School of Medicine, Shimotsuke, 329-0498 Japan
| | - Masato Akiyama
- Laboratory for Statistical Analysis, RIKEN Center for Integrative Medical Sciences, Yokohama, 230-0045 Japan
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, 812-8582 Japan
| | - Hiroaki Ikezaki
- Department of General Internal Medicine, Kyushu University Hospital, Fukuoka, 812-8582 Japan
| | - Norihiro Furusyo
- Department of General Internal Medicine, Kyushu University Hospital, Fukuoka, 812-8582 Japan
| | - Seiko Shimizu
- Department of Integrative Physiology and Bio-Nano Medicine, National Defense Medical College, Tokorozawa, 359-8513 Japan
| | - Ken Yamamoto
- Department of Medical Biochemistry, Kurume University School of Medicine, Kurume, 830-0011 Japan
| | - Makoto Hirata
- Laboratory of Genome Technology, Institute of Medical Science, The University of Tokyo, Tokyo, 108-8639 Japan
| | - Rieko Okada
- Department of Preventive Medicine, Nagoya University Graduate School of Medicine, Nagoya, 466-8550 Japan
| | - Sayo Kawai
- Department of Preventive Medicine, Nagoya University Graduate School of Medicine, Nagoya, 466-8550 Japan
| | - Makoto Kawaguchi
- Department of Integrative Physiology and Bio-Nano Medicine, National Defense Medical College, Tokorozawa, 359-8513 Japan
- Department of Urology, National Defense Medical College, Tokorozawa, 359-8513 Japan
| | - Yuichiro Nishida
- Department of Preventive Medicine, Faculty of Medicine, Saga University, Saga, 849-8501 Japan
| | - Chisato Shimanoe
- Department of Preventive Medicine, Faculty of Medicine, Saga University, Saga, 849-8501 Japan
| | - Rie Ibusuki
- International Island and Community Medicine, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, 890-8544 Japan
| | - Toshiro Takezaki
- International Island and Community Medicine, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, 890-8544 Japan
| | - Mayuko Nakajima
- Department of Integrative Physiology and Bio-Nano Medicine, National Defense Medical College, Tokorozawa, 359-8513 Japan
| | - Mikiya Takao
- Department of Integrative Physiology and Bio-Nano Medicine, National Defense Medical College, Tokorozawa, 359-8513 Japan
- Department of Surgery, National Defense Medical College, Tokorozawa, 359-8513 Japan
| | - Etsuko Ozaki
- Department of Epidemiology for Community Health and Medicine, Kyoto Prefectural University of Medicine, Kyoto, 602-8566 Japan
| | - Daisuke Matsui
- Department of Epidemiology for Community Health and Medicine, Kyoto Prefectural University of Medicine, Kyoto, 602-8566 Japan
| | - Takeshi Nishiyama
- Department of Public Health, Nagoya City University Graduate School of Medical Sciences, Nagoya, 467-8602 Japan
| | - Sadao Suzuki
- Department of Public Health, Nagoya City University Graduate School of Medical Sciences, Nagoya, 467-8602 Japan
| | - Naoyuki Takashima
- Department of Health Science, Shiga University of Medical Science, Otsu, 520-2192 Japan
| | - Yoshikuni Kita
- Department of Nursing, Tsuruga City College of Nursing, Fukui, 914-8501 Japan
| | - Kaori Endoh
- Laboratory of Public Health, Division of Nutritional Sciences, School of Food and Nutritional Sciences, University of Shizuoka, Shizuoka, 422-8526 Japan
| | - Kiyonori Kuriki
- Laboratory of Public Health, Division of Nutritional Sciences, School of Food and Nutritional Sciences, University of Shizuoka, Shizuoka, 422-8526 Japan
| | - Hirokazu Uemura
- Department of Preventive Medicine, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, 770-8503 Japan
| | - Kokichi Arisawa
- Department of Preventive Medicine, Institute of Biomedical Sciences, Tokushima University Graduate School, Tokushima, 770-8503 Japan
| | - Isao Oze
- Division of Cancer Epidemiology and Prevention, Aichi Cancer Center Research Institute, Nagoya, 464-8681 Japan
| | - Keitaro Matsuo
- Division of Cancer Epidemiology and Prevention, Aichi Cancer Center Research Institute, Nagoya, 464-8681 Japan
- Department of Epidemiology, Nagoya University Graduate School of Medicine, Nagoya, 466-8550 Japan
| | - Yohko Nakamura
- Cancer Prevention Center, Chiba Cancer Center Research Institute, Chiba, 260-8717 Japan
| | - Haruo Mikami
- Cancer Prevention Center, Chiba Cancer Center Research Institute, Chiba, 260-8717 Japan
| | - Takashi Tamura
- Department of Preventive Medicine, Nagoya University Graduate School of Medicine, Nagoya, 466-8550 Japan
| | - Hiroshi Nakashima
- Department of Preventive Medicine and Public Health, National Defense Medical College, Tokorozawa, 359-8513 Japan
| | - Takahiro Nakamura
- Laboratory for Mathematics, National Defense Medical College, Tokorozawa, 359-8513 Japan
| | - Norihiro Kato
- Department of Gene Diagnostics and Therapeutics, Research Institute, National Center for Global Health and Medicine, Tokyo, 162-8655 Japan
| | - Koichi Matsuda
- Department of Computational Biology and Medical Sciences, Graduate School of Frontier Sciences, The University of Tokyo, Tokyo, 108-8639 Japan
| | - Yoshinori Murakami
- Division of Molecular Pathology, Institute of Medical Science, The University of Tokyo, Tokyo, 108-8639 Japan
| | - Tatsuaki Matsubara
- Department of Internal Medicine, School of Dentistry, Aichi Gakuin University, Nagoya, 464-8651 Japan
| | - Mariko Naito
- Department of Preventive Medicine, Nagoya University Graduate School of Medicine, Nagoya, 466-8550 Japan
- Department of Oral Epidemiology, Hiroshima University Graduate School of Biomedical & Health Sciences, Hiroshima, 734-8553 Japan
| | - Michiaki Kubo
- RIKEN Center for Integrative Medical Sciences, Yokohama, 230-0045 Japan
| | - Yoichiro Kamatani
- Laboratory for Statistical Analysis, RIKEN Center for Integrative Medical Sciences, Yokohama, 230-0045 Japan
- Center for Genomic Medicine, Kyoto University Graduate School of Medicine, Kyoto, 606-8507 Japan
| | - Nariyoshi Shinomiya
- Department of Integrative Physiology and Bio-Nano Medicine, National Defense Medical College, Tokorozawa, 359-8513 Japan
| | - Mitsuhiro Yokota
- Department of Genome Science, School of Dentistry, Aichi Gakuin University, Nagoya, 464-8651 Japan
| | - Kenji Wakai
- Department of Preventive Medicine, Nagoya University Graduate School of Medicine, Nagoya, 466-8550 Japan
| | - Yukinori Okada
- Laboratory for Statistical Analysis, RIKEN Center for Integrative Medical Sciences, Yokohama, 230-0045 Japan
- Department of Statistical Genetics, Osaka University Graduate School of Medicine, Suita, 565-0871 Japan
- Laboratory of Statistical Immunology, Immunology Frontier Research Center (WPI-IFReC), Osaka University, Suita, 565-0871 Japan
| | - Hirotaka Matsuo
- Department of Integrative Physiology and Bio-Nano Medicine, National Defense Medical College, Tokorozawa, 359-8513 Japan
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Shen H, Scialis RJ, Lehman-McKeeman L. Xenobiotic Transporters in the Kidney: Function and Role in Toxicity. Semin Nephrol 2019; 39:159-175. [DOI: 10.1016/j.semnephrol.2018.12.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Qiao Y, Liu X, Li X, Wang X, Li C, Khutsishvili M, Alizade V, Atha D, Zhang Y, Borris RP. Biflavonoids from Juniperus oblonga inhibit organic anion transporter 3. Biochem Biophys Res Commun 2019; 509:931-936. [PMID: 30648554 DOI: 10.1016/j.bbrc.2019.01.039] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2018] [Accepted: 01/08/2019] [Indexed: 01/04/2023]
Abstract
Organic anion transporters (OATs in humans, Oats in rodents) play an important role in the distribution and excretion of numerous endogenous metabolic products and exogenous organic anions, including a host of widely prescribed drugs. Their ligand recognition is also important for drug therapy and development. In this study, the n-butanol and dichloromethane soluble fractions of Juniperus oblonga were found to inhibit OAT3 in vitro and three biflavonoids were found to be responsible for this activity. One of these compounds, amentoflavone exhibited stronger inhibition than probenecid, a known strong inhibitor of OAT3. Biological characterization of amentoflavone in vivo also showed inhibition of Oat3. Preliminary observations of structure-activity relationships suggest that the biflavonoids are more potent inhibitors of this transporter than their corresponding monomer, and that methylation of even a single hydroxyl group results in a substantial decrease in activity. This greater potency of the biflavonoids may indicate the need for a more in-depth investigation of the distribution of biflavonoids in plants used as foodstuffs and herbal medicines, due to their potential for causing interactions with OAT3 substrate drugs.
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Affiliation(s)
- Yilin Qiao
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, 30072, China
| | - Xueling Liu
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, 30072, China
| | - Xue Li
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, 30072, China
| | - Xue Wang
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, 30072, China
| | - Caiyu Li
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, 30072, China
| | - Manana Khutsishvili
- National Herbarium of Georgia, Ilia State University, Tbilisi, 100995, Georgia
| | - Valida Alizade
- Institute of Botany, Azerbaijan National Academy of Sciences, Baku, AZ, 1102, Azerbaijan
| | - Daniel Atha
- New York Botanical Garden, Bronx, 10041, NY, USA
| | - Youcai Zhang
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, 30072, China
| | - Robert P Borris
- School of Pharmaceutical Science and Technology, Tianjin University, Tianjin, 30072, China.
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Pharmacological urate-lowering approaches in chronic kidney disease. Eur J Med Chem 2019; 166:186-196. [PMID: 30769179 DOI: 10.1016/j.ejmech.2019.01.043] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 01/20/2019] [Accepted: 01/20/2019] [Indexed: 02/05/2023]
Abstract
Chronic kidney disease (CKD) has become a global public health issue and uric acid (UA) remains a major risk factor of CKD. As the main organ for the elimination of UA, kidney owned a group of urate transporters in tubular epithelium. Kidney disease hampered the UA excretion, and the accumulation of serum UA in return harmed the renal function. Commercially, there are three kinds of agents targeting at urate-lowering, xanthine oxidoreductase inhibitor which prevents the production of UA, uricosuric which increases the concentration of UA in urine thus decreasing serum UA level, and uricase which converts UA to allantoin resulting in the dramatic decrement of serum UA. Of note, in patients with CKD, administration of above-mentioned agents, alone or combined, needs special attention. New evidence is emerging for the efficacy of several urate-lowering drugs for the treatment of hyperuricemia in patients with CKD. Besides, loads of novel and promising drug candidates and phytochemicals are in the different phases of research and development. As of today, there is insufficient evidence to recommend the widespread use of UA-lowering therapy to prevent or slow down the progression of CKD. The review summarized the evidence and perspectives about the treatment of hyperuricemia with CKD for medicinal chemist and nephrologist.
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Yu F, Zhang T, Guo L, Wu B. Liver Receptor Homolog-1 Regulates Organic Anion Transporter 2 and Docetaxel Pharmacokinetics. Drug Metab Dispos 2018; 46:980-988. [PMID: 29669824 DOI: 10.1124/dmd.118.080895] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 04/09/2018] [Indexed: 01/15/2023] Open
Abstract
Organic anion transporter 2 (OAT2/SLC22A7) is an uptake transporter that plays an important role in drug disposition. Here, we investigate a potential role of liver receptor homolog-1 (Lrh-1) in regulation of Oat2 and docetaxel pharmacokinetics. Hepatoma cells (Hepa1-6 and HepG2 cells) were transfected with Lrh-1/LRH-1 expression vector or siRNA. The relative mRNA and protein levels of Oat2/OAT2 in the cells or livers of Lrh-1hep-/- mice were determined by qPCR and Western blotting, respectively. Transcriptional regulation of Oat2/OAT2 by Lrh-1/LRH-1 was investigated using luciferase reporter, mobility shift, and chromatin immunoprecipitation (ChIP) assays. Pharmacokinetic studies were performed with wild-type (Lrh-1fl/fl) and Lrh-1hep-/- mice after intraperitoneal injection of docetaxel. Overexpression of Lrh-1 in Hepa1-6 cells led to significant increases in Oat2 mRNA and protein. Consistently, Lrh-1 knockdown caused decreases in Oat2 mRNA and protein, as well as reduced cellular uptake of PGE2, a prototypical substrate of Oat2. Similarly, an activation effect of LRH-1 on OAT2 expression was observed in HepG2 cells. In addition, the levels of Oat2 mRNA and protein were markedly reduced in Lrh-1hep-/- mice. Lrh-1/LRH-1 induced the transcription of Oat2/OAT2 in luciferase reporter assays. Truncation analysis revealed a potential Lrh-1 response element (-716- to -702-bp) in Oat2 promoter. Direct binding of Lrh-1 to this response element was confirmed by mobility shift and ChIP assays. Furthermore, systemic exposure of docetaxel was upregulated in Lrh-1hep-/- mice due to reduced hepatic uptake. In conclusion, Lrh-1 transcriptionally regulates Oat2, thereby impacting tissue uptake and pharmacokinetics of Oat2 substrates.
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Affiliation(s)
- Fangjun Yu
- Research Center for Biopharmaceutics and Pharmacokinetics, College of Pharmacy (F.Y., T.Z., L.G., B.W.) and Guangdong Province Key Laboratory of Pharmacodynamic Constituents of Traditional Chinese Medicine and New Drugs Research (F.Y., B.W.), Jinan University, Guangzhou, China
| | - Tianpeng Zhang
- Research Center for Biopharmaceutics and Pharmacokinetics, College of Pharmacy (F.Y., T.Z., L.G., B.W.) and Guangdong Province Key Laboratory of Pharmacodynamic Constituents of Traditional Chinese Medicine and New Drugs Research (F.Y., B.W.), Jinan University, Guangzhou, China
| | - Lianxia Guo
- Research Center for Biopharmaceutics and Pharmacokinetics, College of Pharmacy (F.Y., T.Z., L.G., B.W.) and Guangdong Province Key Laboratory of Pharmacodynamic Constituents of Traditional Chinese Medicine and New Drugs Research (F.Y., B.W.), Jinan University, Guangzhou, China
| | - Baojian Wu
- Research Center for Biopharmaceutics and Pharmacokinetics, College of Pharmacy (F.Y., T.Z., L.G., B.W.) and Guangdong Province Key Laboratory of Pharmacodynamic Constituents of Traditional Chinese Medicine and New Drugs Research (F.Y., B.W.), Jinan University, Guangzhou, China
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Huo X, Liu K. Renal organic anion transporters in drug-drug interactions and diseases. Eur J Pharm Sci 2017; 112:8-19. [PMID: 29109021 DOI: 10.1016/j.ejps.2017.11.001] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2017] [Revised: 10/10/2017] [Accepted: 11/01/2017] [Indexed: 12/17/2022]
Abstract
The kidney plays a vital role in maintaining systemic homeostasis. Active tubular secretion and reabsorption, which are mainly mediated by transporters, is an efficient mechanism for retaining glucose, amino acids, and other nutrients and for the clearance of endogenous waste products and xenobiotics. These substances are recognized by uptake transporters located in the basolateral and apical membranes of renal proximal tubule cells and are extracted from plasma and urine. Organic anion transporters (OATs) belong to the solute carrier (SLC) 22 superfamily and facilitate organic anions across the plasma membranes of renal proximal tubule cells. OATs are responsible for the transmembrane transport of anionic and zwitterionic organic molecules, including endogenous substances and many drugs. The alteration in OAT expression and function caused by diseases, drug-drug interactions (DDIs) or other issues can thus change the renal disposition of substrates, induce the accumulation of toxic metabolites, and lead to unexpected clinically outcome. This review summarizes the recent information regarding the expression, regulation, and substrate spectrum of OATs and discusses the roles of OATs in diseases and DDIs. These findings will enables us to have a better understanding of the related disease therapy and the potential risk of DDIs mediated by OATs.
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Affiliation(s)
- Xiaokui Huo
- Department of Clinical Pharmacology, College of Pharmacy, Dalian Medical University, Dalian 116044, China; Key Laboratory of Pharmacokinetics and Transport of Liaoning Province, Dalian Medical University, Dalian 116044, China; College (Institute) of Integrative Medicine, Dalian Medical University, Dalian 116044, China
| | - Kexin Liu
- Department of Clinical Pharmacology, College of Pharmacy, Dalian Medical University, Dalian 116044, China; Key Laboratory of Pharmacokinetics and Transport of Liaoning Province, Dalian Medical University, Dalian 116044, China; College (Institute) of Integrative Medicine, Dalian Medical University, Dalian 116044, China.
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Ben Salem C, Slim R, Fathallah N, Hmouda H. Drug-induced hyperuricaemia and gout. Rheumatology (Oxford) 2017; 56:679-688. [PMID: 27498351 DOI: 10.1093/rheumatology/kew293] [Citation(s) in RCA: 60] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Indexed: 12/21/2022] Open
Abstract
Hyperuricaemia is a common clinical condition that can be defined as a serum uric acid level >6.8 mg/dl (404 µmol/l). Gout, a recognized complication of hyperuricaemia, is the most common inflammatory arthritis in adults. Drug-induced hyperuricaemia and gout present an emergent and increasingly prevalent problem in clinical practice. Diuretics are one of the most important causes of secondary hyperuricaemia. Drugs raise serum uric acid level by an increase of uric acid reabsorption and/or decrease in uric acid secretion. Several drugs may also increase uric acid production. In this review, drugs leading to hyperuricaemia are summarized with regard to their mechanism of action and clinical significance. Increased awareness of drugs that can induce hyperuricaemia and gout, and monitoring and prevention are key elements for reducing the morbidity related to drug-induced hyperuricaemia and gout.
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Affiliation(s)
- C Ben Salem
- Department of Pharmacovigilance, Faculty of Medicine of Sousse and
| | - Raoudha Slim
- Department of Pharmacovigilance, Faculty of Medicine of Sousse and
| | - Neila Fathallah
- Department of Pharmacovigilance, Faculty of Medicine of Sousse and
| | - Houssem Hmouda
- Medical Intensive Care Unit, Sahloul University Hospital, Sousse, Tunisia
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Abstract
Transporters in proximal renal tubules contribute to the disposition of numerous drugs. Furthermore, the molecular mechanisms of tubular secretion have been progressively elucidated during the past decades. Organic anions tend to be secreted by the transport proteins OAT1, OAT3 and OATP4C1 on the basolateral side of tubular cells, and multidrug resistance protein (MRP) 2, MRP4, OATP1A2 and breast cancer resistance protein (BCRP) on the apical side. Organic cations are secreted by organic cation transporter (OCT) 2 on the basolateral side, and multidrug and toxic compound extrusion (MATE) proteins MATE1, MATE2/2-K, P-glycoprotein, organic cation and carnitine transporter (OCTN) 1 and OCTN2 on the apical side. Significant drug-drug interactions (DDIs) may affect any of these transporters, altering the clearance and, consequently, the efficacy and/or toxicity of substrate drugs. Interactions at the level of basolateral transporters typically decrease the clearance of the victim drug, causing higher systemic exposure. Interactions at the apical level can also lower drug clearance, but may be associated with higher renal toxicity, due to intracellular accumulation. Whereas the importance of glomerular filtration in drug disposition is largely appreciated among clinicians, DDIs involving renal transporters are less well recognized. This review summarizes current knowledge on the roles, quantitative importance and clinical relevance of these transporters in drug therapy. It proposes an approach based on substrate-inhibitor associations for predicting potential tubular-based DDIs and preventing their adverse consequences. We provide a comprehensive list of known drug interactions with renally-expressed transporters. While many of these interactions have limited clinical consequences, some involving high-risk drugs (e.g. methotrexate) definitely deserve the attention of prescribers.
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Affiliation(s)
- Anton Ivanyuk
- Division of Clinical Pharmacology, Lausanne University Hospital (CHUV), Bugnon 17, 1011, Lausanne, Switzerland.
| | - Françoise Livio
- Division of Clinical Pharmacology, Lausanne University Hospital (CHUV), Bugnon 17, 1011, Lausanne, Switzerland
| | - Jérôme Biollaz
- Division of Clinical Pharmacology, Lausanne University Hospital (CHUV), Bugnon 17, 1011, Lausanne, Switzerland
| | - Thierry Buclin
- Division of Clinical Pharmacology, Lausanne University Hospital (CHUV), Bugnon 17, 1011, Lausanne, Switzerland
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Tanner C, Boocock J, Stahl EA, Dobbyn A, Mandal AK, Cadzow M, Phipps-Green AJ, Topless RK, Hindmarsh JH, Stamp LK, Dalbeth N, Choi HK, Mount DB, Merriman TR. Population-Specific Resequencing Associates the ATP-Binding Cassette Subfamily C Member 4 Gene With Gout in New Zealand Māori and Pacific Men. Arthritis Rheumatol 2017; 69:1461-1469. [PMID: 28371506 DOI: 10.1002/art.40110] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Accepted: 03/23/2017] [Indexed: 12/30/2022]
Abstract
OBJECTIVE There is no evidence for a genetic association between organic anion transporters 1-3 (SLC22A6, SLC22A7, and SLC22A8) and multidrug resistance protein 4 (MRP4; encoded by ABCC4) with the levels of serum urate or gout. The Māori and Pacific (Polynesian) population of New Zealand has the highest prevalence of gout worldwide. The aim of this study was to determine whether any Polynesian population-specific genetic variants in SLC22A6-8 and ABCC4 are associated with gout. METHODS All participants had ≥3 self-reported Māori and/or Pacific grandparents. Among the total sample set of 1,808 participants, 191 hyperuricemic and 202 normouricemic individuals were resequenced over the 4 genes, and the remaining 1,415 individuals were used for replication. Regression analyses were performed, adjusting for age, sex, and Polynesian ancestry. To study the functional effect of nonsynonymous variants of ABCC4, transport assays were performed in Xenopus laevis oocytes. RESULTS A total of 39 common variants were detected, with an ABCC4 variant (rs4148500) significantly associated with hyperuricemia and gout. This variant was monomorphic for the urate-lowering allele in Europeans. There was evidence for an association of rs4148500 with gout in the resequenced samples (odds ratio [OR] 1.62 [P = 0.012]) that was replicated (OR 1.25 [P = 0.033]) and restricted to men (OR 1.43 [P = 0.001] versus OR 0.98 [P = 0.89] in women). The gout risk allele was associated with fractional excretion of uric acid in male individuals (β = -0.570 [P = 0.01]). A rare population-specific allele (P1036L) with predicted strong functional consequence reduced the uric acid transport activity of ABCC4 by 30%. CONCLUSION An association between ABCC4 and gout and fractional excretion of uric acid is consistent with the established role of MRP4 as a unidirectional renal uric acid efflux pump.
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Affiliation(s)
| | | | - Eli A Stahl
- Icahn School of Medicine at Mount Sinai, New York, New York
| | - Amanda Dobbyn
- Icahn School of Medicine at Mount Sinai, New York, New York
| | - Asim K Mandal
- Brigham and Women's Hospital and VA Boston Healthcare System, Harvard Medical School, Boston, Massachusetts
| | | | | | | | | | - Lisa K Stamp
- University of Otago Christchurch, Christchurch, New Zealand
| | | | - Hyon K Choi
- Massachusetts General Hospital, Harvard Medical School, Boston
| | - David B Mount
- Brigham and Women's Hospital and VA Boston Healthcare System, Harvard Medical School, Boston, Massachusetts
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Shen H, Lai Y, Rodrigues AD. Organic Anion Transporter 2: An Enigmatic Human Solute Carrier. Drug Metab Dispos 2016; 45:228-236. [PMID: 27872146 DOI: 10.1124/dmd.116.072264] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Accepted: 11/17/2016] [Indexed: 12/28/2022] Open
Abstract
As a member of the solute carrier 22A (SLC22A) family, organic anion transporter 2 (OAT2; SLC22A7) is emerging as an important drug transporter because of its expression in both the liver and kidney, two major eliminating organs, and its ability to transport not only a wide variety of xenobiotics but also numerous physiologically important endogenous compounds, like creatinine and cGMP. However, OAT2 has received relatively little attention compared with other OATs and solute carriers (SLCs), like organic cation transporters, sodium-dependent taurocholate cotransporting polypeptide, multidrug and toxin extrusion proteins, and organic anion-transporting polypeptides. Overall, the literature describing OAT2 is rapidly evolving, with numerous publications contradicting each other regarding the transport mechanism, tissue distribution, and transport of creatinine and cGMP, two important endogenous OAT2 substrates. Despite its status as a liver and kidney SLC, tools for assessing its activity and inhibition are lacking, and its role in drug disposition and elimination remains to be defined. The current review focuses on the available and emerging literature describing OAT2. We envision that OAT2 will gain more prominence as its expression, substrate, and inhibitor profile is investigated further and compared with other SLCs.
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Affiliation(s)
- Hong Shen
- Department of Metabolism and Pharmacokinetics, Bristol-Myers Squibb Research and Development, Princeton, New Jersey (H.S., Y.L.), and Department of Pharmacokinetics, Dynamics, and Metabolism, Pfizer World Wide Research and Development, Groton, Connecticut (A.D.R.)
| | - Yurong Lai
- Department of Metabolism and Pharmacokinetics, Bristol-Myers Squibb Research and Development, Princeton, New Jersey (H.S., Y.L.), and Department of Pharmacokinetics, Dynamics, and Metabolism, Pfizer World Wide Research and Development, Groton, Connecticut (A.D.R.)
| | - A David Rodrigues
- Department of Metabolism and Pharmacokinetics, Bristol-Myers Squibb Research and Development, Princeton, New Jersey (H.S., Y.L.), and Department of Pharmacokinetics, Dynamics, and Metabolism, Pfizer World Wide Research and Development, Groton, Connecticut (A.D.R.)
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Mihaljevic I, Popovic M, Zaja R, Smital T. Phylogenetic, syntenic, and tissue expression analysis of slc22 genes in zebrafish (Danio rerio). BMC Genomics 2016; 17:626. [PMID: 27519738 PMCID: PMC4982206 DOI: 10.1186/s12864-016-2981-y] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Accepted: 07/29/2016] [Indexed: 01/11/2023] Open
Abstract
BACKGROUND SLC22 protein family is a member of the SLC (Solute carriers) superfamily of polyspecific membrane transporters responsible for uptake of a wide range of organic anions and cations, including numerous endo- and xenobiotics. Due to the lack of knowledge on zebrafish Slc22 family, we performed initial characterization of these transporters using a detailed phylogenetic and conserved synteny analysis followed by the tissue specific expression profiling of slc22 transcripts. RESULTS We identified 20 zebrafish slc22 genes which are organized in the same functional subgroups as human SLC22 members. Orthologies and syntenic relations between zebrafish and other vertebrates revealed consequences of the teleost-specific whole genome duplication as shown through one-to-many orthologies for certain zebrafish slc22 genes. Tissue expression profiles of slc22 transcripts were analyzed using qRT-PCR determinations in nine zebrafish tissues: liver, kidney, intestine, gills, brain, skeletal muscle, eye, heart, and gonads. Our analysis revealed high expression of oct1 in kidney, especially in females, followed by oat3 and oat2c in females, oat2e in males and orctl4 in females. oct1 was also dominant in male liver. oat2d showed the highest expression in intestine with less noticeable gender differences. All slc22 genes showed low expression in gills, and moderate expression in heart and skeletal muscle. Dominant genes in brain were oat1 in females and oct1 in males, while the highest gender differences were determined in gonads, with dominant expression of almost all slc22 genes in testes and the highest expression of oat2a. CONCLUSIONS Our study offers the first insight into the orthology relationships, gene expression and potential role of Slc22 membrane transporters in zebrafish. Clear orthological relationships of zebrafish slc22 and other vertebrate slc22 genes were established. slc22 members are mostly highly conserved, suggesting their physiological and toxicological importance. One-to-many orthologies and differences in tissue expression patterns of zebrafish slc22 genes in comparison to human orthologs were observed. Our expression data point to partial similarity of zebrafish versus human Slc22 members, with possible compensatory roles of certain zebrafish transporters, whereas higher number of some orthologs implies potentially more diverse and specific roles of these proteins in zebrafish.
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Affiliation(s)
- Ivan Mihaljevic
- Division for Marine and Environmental Research, Laboratory for Molecular Ecotoxicology, Ruđer Bošković Institute, Bijenička cesta 54, 10000, Zagreb, Croatia
| | - Marta Popovic
- Division for Marine and Environmental Research, Laboratory for Molecular Ecotoxicology, Ruđer Bošković Institute, Bijenička cesta 54, 10000, Zagreb, Croatia.,Department of Oncology, University of Oxford, Old Road Campus Research Building, Roosevelt Drive, Oxford, UK
| | - Roko Zaja
- Division for Marine and Environmental Research, Laboratory for Molecular Ecotoxicology, Ruđer Bošković Institute, Bijenička cesta 54, 10000, Zagreb, Croatia.,Sir William Dunn School of Pathology, University of Oxford, Oxford, England, UK
| | - Tvrtko Smital
- Division for Marine and Environmental Research, Laboratory for Molecular Ecotoxicology, Ruđer Bošković Institute, Bijenička cesta 54, 10000, Zagreb, Croatia.
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Richards L, Li M, van Esch B, Garssen J, Folkerts G. The effects of short-chain fatty acids on the cardiovascular system. PHARMANUTRITION 2016. [DOI: 10.1016/j.phanu.2016.02.001] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Liu Y, Pu QH, Wu MJ, Yu C. Proteomic analysis for the impact of hypercholesterolemia on expressions of hepatic drug transporters and metabolizing enzymes. Xenobiotica 2016; 46:940-7. [DOI: 10.3109/00498254.2016.1144228] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Yan Liu
- Institute of Life Science, Chongqing Medical University, Chongqing, P.R. China
| | - Qiang-Hong Pu
- Institute of Life Science, Chongqing Medical University, Chongqing, P.R. China
| | - Ming-Jun Wu
- Institute of Life Science, Chongqing Medical University, Chongqing, P.R. China
| | - Chao Yu
- Institute of Life Science, Chongqing Medical University, Chongqing, P.R. China
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Henjakovic M, Hagos Y, Krick W, Burckhardt G, Burckhardt BC. Human organic anion transporter 2 is distinct from organic anion transporters 1 and 3 with respect to transport function. Am J Physiol Renal Physiol 2015; 309:F843-51. [DOI: 10.1152/ajprenal.00140.2015] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2015] [Accepted: 09/15/2015] [Indexed: 02/03/2023] Open
Abstract
Phylogentically, organic anion transporter (OAT)1 and OAT3 are closely related, whereas OAT2 is more distant. Experiments with human embryonic kidney-293 cells stably transfected with human OAT1, OAT2, or OAT3 were performed to compare selected transport properties. Common to OAT1, OAT2, and OAT3 is their ability to transport cGMP. OAT2 interacted with prostaglandins, and cGMP uptake was inhibited by PGE2 and PGF2α with IC50 values of 40.8 and 12.7 μM, respectively. OAT1 (IC50: 23.7 μM), OAT2 (IC50: 9.5 μM), and OAT3 (IC50: 1.6 μM) were potently inhibited by MK571, an established multidrug resistance protein inhibitor. OAT2-mediated cGMP uptake was not inhibited by short-chain monocarboxylates and, as opposed to OAT1 and OAT3, not by dicarboxylates. Consequently, OAT2 showed no cGMP/glutarate exchange. OAT1 and OAT3 exhibited a pH and a Cl− dependence with higher substrate uptake at acidic pH and lower substrate uptake in the absence of Cl−, respectively. Such pH and Cl− dependencies were not observed with OAT2. Depolarization of membrane potential by high K+ concentrations in the presence of the K+ ionophore valinomycin left cGMP uptake unaffected. In addition to cGMP, OAT2 transported urate and glutamate, but cGMP/glutamate exchange could not be demonstrated. These experiments suggest that OAT2-mediated cGMP uptake does not occur via exchange with monocarboxylates, dicarboxylates, and hydroxyl ions. The counter anion for electroneutral cGMP uptake remains to be identified.
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Affiliation(s)
- Maja Henjakovic
- Institute of Systemic Physiology and Pathophysiology, University Medical Center Göttingen, Göttingen, Germany
| | - Yohannes Hagos
- Institute of Systemic Physiology and Pathophysiology, University Medical Center Göttingen, Göttingen, Germany
| | - Wolfgang Krick
- Institute of Systemic Physiology and Pathophysiology, University Medical Center Göttingen, Göttingen, Germany
| | - Gerhard Burckhardt
- Institute of Systemic Physiology and Pathophysiology, University Medical Center Göttingen, Göttingen, Germany
| | - Birgitta C. Burckhardt
- Institute of Systemic Physiology and Pathophysiology, University Medical Center Göttingen, Göttingen, Germany
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Hotchkiss AG, Berrigan L, Pelis RM. Organic anion transporter 2 transcript variant 1 shows broad ligand selectivity when expressed in multiple cell lines. Front Pharmacol 2015; 6:216. [PMID: 26500550 PMCID: PMC4594013 DOI: 10.3389/fphar.2015.00216] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Accepted: 09/15/2015] [Indexed: 01/24/2023] Open
Abstract
Organic anion transporter 2 (OAT2) is likely important for renal and hepatic drug elimination. Three variants of the OAT2 peptide sequence have been described – OAT2 transcript variant 1 (OAT2-tv1), OAT2 transcript variant 2 (OAT2-tv2), and OAT2 transcript variant 3 (OAT2-tv3). Early studies helping to define the ligand selectivity of OAT2 failed to identify the variant used, and the studies used several heterologous expression systems. In preliminary studies using OAT2-tv1, we failed to observe transport of several previously identified substrates, leading us to speculate that ligand selectivity of OAT2 differs with variant and/or heterologous expression system. The purpose was to further investigate the ligand selectivity of the OAT2 variants expressed in multiple cell types. We cloned OAT2-tv1 and OAT2-tv2, but were unsuccessful at amplifying mRNA for OAT2-tv3 from human kidney. OAT2-tv1 and OAT2-tv2 were individually expressed in human embryonic kidney (HEK), Madin-Darby canine kidney (MDCK), or Chinese hamster ovary (CHO) cells. mRNA for OAT2-tv1 and OAT2-tv2 was demonstrated in each cell type transfected with the respective construct, indicating their expression. OAT2-tv1 trafficked to the plasma membrane of all three cell types, but OAT2-tv2 did not. OAT2-tv1 transported penciclovir in all three cell types, but failed to transport para-aminohippurate, succinate, glutarate, estrone-3-sulfate, paclitaxel or dehydroepiandrosterone sulfate – previously identified substrates of OAT2-tv2. Not surprising given its lack of plasma membrane expression, OAT2-tv2 failed to transport any of the organic solutes examined, including penciclovir. Penciclovir transport by OAT2-tv1 was sensitive to large (e.g., cyclosporine A) and small (e.g., allopurinol) organic compounds, as well as organic anions, cations and neutral compounds, highlighting the multiselectivity of OAT2-tv1. The potencies with which indomethacin, furosemide, cyclosporine A and cimetidine inhibited OAT2-tv1 are in good agreement with previous studies using this variant, but inconsistent with studies using OAT2 with an unidentified sequence. This study shows that organic molecules with diverse physicochemical properties interact with OAT2-tv1, making it a likely site of drug interactions. Many previously identified substrates of OAT2 are not transported by OAT2-tv1, suggesting that variant and/or expression system may contribute. Future work should establish the expression pattern and ligand selectivity of OAT2-tv3.
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Affiliation(s)
- Adam G Hotchkiss
- Department of Pharmacology, Dalhousie University Halifax, NS, Canada
| | - Liam Berrigan
- Department of Pharmacology, Dalhousie University Halifax, NS, Canada
| | - Ryan M Pelis
- Department of Pharmacology, Dalhousie University Halifax, NS, Canada
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Affiliation(s)
- Asim K. Mandal
- Renal Divisions, Brigham and Women's Hospital and VA Boston Healthcare System, Harvard Medical School, Boston, Massachusetts 02115;
| | - David B. Mount
- Renal Divisions, Brigham and Women's Hospital and VA Boston Healthcare System, Harvard Medical School, Boston, Massachusetts 02115;
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Marada VVVR, Flörl S, Kühne A, Müller J, Burckhardt G, Hagos Y. Interaction of human organic anion transporter 2 (OAT2) and sodium taurocholate cotransporting polypeptide (NTCP) with antineoplastic drugs. Pharmacol Res 2014; 91:78-87. [PMID: 25481222 DOI: 10.1016/j.phrs.2014.11.002] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Revised: 10/23/2014] [Accepted: 11/13/2014] [Indexed: 02/07/2023]
Abstract
The ability of an antineoplastic drug to exert its cytostatic effect depends largely on the balance between its uptake into and extrusion from the cancer cells. ATP driven efflux transporter proteins drive the export of antineoplastic drugs and play a pivotal role in the development of chemoresistance. As regards uptake transporters, comparably less is known on their impact in drug action. In the current study, we characterized the interactions of two uptake transporter proteins, expressed mainly in the liver; the organic anion transporter 2 (OAT2, encoded by the SLC22A7 gene) and the sodium taurocholate cotransporting polypeptide (NTCP, encoded by the SLC10A1 gene), stably transfected in human embryonic kidney cells, with some antineoplastic agents that are routinely being used in cancer chemotherapy. Whereas NTCP did not show any strong interactions with the cytostatics tested, we observed a very strong inhibition of OAT2 mediated [(3)H] cGMP uptake in the presence of bendamustine, irinotecan and paclitaxel. The Ki values of OAT2 for bendamustine, irinotecan and paclitaxel were determined to be 43.3±4.33μM, 26.4±2.34μM and 10.4±0.45μM, respectively. Incubation of bendamustine with OAT2 expressing cells increased the caspase-3 activity, and this increase was inhibited by simultaneous incubation with bendamustine and probenecid, a well-known inhibitor of OATs, suggesting that bendamustine is a substrate of OAT2. A higher accumulation of irinotecan was observed in OAT2 expressing cells compared to control pcDNA cells by HPLC analysis of cell lysates. The accumulation was diminished in the presence of cGMP, the substrate we used to functionally characterize OAT2, suggesting specificity of this uptake and the fact that OAT2 mediates uptake of irinotecan.
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Affiliation(s)
- Venkata V V R Marada
- Institut für Vegetative Physiologie und Pathophysiologie, Universitätmedizin Göttingen, Humboldtallee 23, 37073 Göttingen, Germany.
| | - Saskia Flörl
- PortaCellTec biosciences GmbH, Humboldtallee 23, 37073 Goettingen, Germany.
| | - Annett Kühne
- PortaCellTec biosciences GmbH, Humboldtallee 23, 37073 Goettingen, Germany.
| | - Judith Müller
- Institut für Vegetative Physiologie und Pathophysiologie, Universitätmedizin Göttingen, Humboldtallee 23, 37073 Göttingen, Germany.
| | - Gerhard Burckhardt
- Institut für Vegetative Physiologie und Pathophysiologie, Universitätmedizin Göttingen, Humboldtallee 23, 37073 Göttingen, Germany.
| | - Yohannes Hagos
- Institut für Vegetative Physiologie und Pathophysiologie, Universitätmedizin Göttingen, Humboldtallee 23, 37073 Göttingen, Germany; PortaCellTec biosciences GmbH, Humboldtallee 23, 37073 Goettingen, Germany.
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Ruiz ML, Mottino AD, Catania VA, Vore M. Hormonal regulation of hepatic drug biotransformation and transport systems. Compr Physiol 2014; 3:1721-40. [PMID: 24265243 DOI: 10.1002/cphy.c130018] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The human body is constantly exposed to many xenobiotics including environmental pollutants, food additives, therapeutic drugs, etc. The liver is considered the primary site for drug metabolism and elimination pathways, consisting in uptake, phase I and II reactions, and efflux processes, usually acting in this same order. Modulation of biotransformation and disposition of drugs of clinical application has important therapeutic and toxicological implications. We here provide a compilation and analysis of relevant, more recent literature reporting hormonal regulation of hepatic drug biotransformation and transport systems. We provide additional information on the effect of hormones that tentatively explain differences between sexes. A brief discussion on discrepancies between experimental models and species, as well as a link between gender-related differences and the hormonal mechanism explaining such differences, is also presented. Finally, we include a comment on the pathophysiological, toxicological, and pharmacological relevance of these regulations.
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Affiliation(s)
- María L Ruiz
- Institute of Experimental Physiology, National University of Rosario, Rosario, Argentina
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Kell DB, Oliver SG. How drugs get into cells: tested and testable predictions to help discriminate between transporter-mediated uptake and lipoidal bilayer diffusion. Front Pharmacol 2014; 5:231. [PMID: 25400580 PMCID: PMC4215795 DOI: 10.3389/fphar.2014.00231] [Citation(s) in RCA: 107] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Accepted: 09/29/2014] [Indexed: 12/12/2022] Open
Abstract
One approach to experimental science involves creating hypotheses, then testing them by varying one or more independent variables, and assessing the effects of this variation on the processes of interest. We use this strategy to compare the intellectual status and available evidence for two models or views of mechanisms of transmembrane drug transport into intact biological cells. One (BDII) asserts that lipoidal phospholipid Bilayer Diffusion Is Important, while a second (PBIN) proposes that in normal intact cells Phospholipid Bilayer diffusion Is Negligible (i.e., may be neglected quantitatively), because evolution selected against it, and with transmembrane drug transport being effected by genetically encoded proteinaceous carriers or pores, whose “natural” biological roles, and substrates are based in intermediary metabolism. Despite a recent review elsewhere, we can find no evidence able to support BDII as we can find no experiments in intact cells in which phospholipid bilayer diffusion was either varied independently or measured directly (although there are many papers where it was inferred by seeing a covariation of other dependent variables). By contrast, we find an abundance of evidence showing cases in which changes in the activities of named and genetically identified transporters led to measurable changes in the rate or extent of drug uptake. PBIN also has considerable predictive power, and accounts readily for the large differences in drug uptake between tissues, cells and species, in accounting for the metabolite-likeness of marketed drugs, in pharmacogenomics, and in providing a straightforward explanation for the late-stage appearance of toxicity and of lack of efficacy during drug discovery programmes despite macroscopically adequate pharmacokinetics. Consequently, the view that Phospholipid Bilayer diffusion Is Negligible (PBIN) provides a starting hypothesis for assessing cellular drug uptake that is much better supported by the available evidence, and is both more productive and more predictive.
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Affiliation(s)
- Douglas B Kell
- School of Chemistry, The University of Manchester Manchester, UK ; Manchester Institute of Biotechnology, The University of Manchester Manchester, UK
| | - Stephen G Oliver
- Department of Biochemistry, University of Cambridge Cambridge, UK ; Cambridge Systems Biology Centre, University of Cambridge Cambridge, UK
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Abstract
PURPOSE OF REVIEW Recent advances in genome technology have provided us with a list of molecules affecting urate handling in humans, many of which are unlikely to be identified through traditional physiological approach alone. Although this article is focused on urate, this can be viewed as a successful model of genomics-physiology collaboration. RECENT FINDINGS URATv1/GLUT9 (SLC2A9) is shown to play a critical role in urate reabsorption at the proximal tubule, probably more prominent than its partner URAT1 (SLC22A12). The major site of action of ABCG2 (ABCG2), an influential urate secretion transporter, has been shown to be the intestine rather than the kidney proximal tubule. Accordingly, hypofunction of ABCG2 leads to increased fractional excretion of urate, a finding traditionally interpreted as overproduction hyperuricemia. Some SLC17 family members secrete urate in the kidney or intestine. OAT2 (SLC22A7) may take up urate from blood to the proximal tubular cell. In addition, how a common single-nucleotide polymorphisms in ABCG2 affects its function has been elucidated. SUMMARY A finer grained picture of urate handling in the human body is now emerging, which will help choosing novel targets for urate-lowering therapy.
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Yao R, Yasuoka A, Kamei A, Ushiama S, Kitagawa Y, Rogi T, Shibata H, Abe K, Misaka T. Nuclear receptor-mediated alleviation of alcoholic fatty liver by polyphenols contained in alcoholic beverages. PLoS One 2014; 9:e87142. [PMID: 24498295 PMCID: PMC3911942 DOI: 10.1371/journal.pone.0087142] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2013] [Accepted: 12/18/2013] [Indexed: 12/22/2022] Open
Abstract
To elucidate the effect of the polyphenols contained in alcoholic beverages on the metabolic stress induced by ethanol consumption, four groups of mice were fed for five weeks on Lieber's diet with or without ethanol, with ethanol plus ellagic acid, and with ethanol plus trans-resveratrol. Alcoholic fatty liver was observed in the group fed the ethanol diet but not in those fed the ethanol plus polyphenol diets. Liver transcriptome analysis revealed that the addition of the polyphenols suppressed the expression of the genes related to cell stress that were up-regulated by ethanol alone. Conversely, the polyphenols up-regulated the genes involved in bile acid synthesis, unsaturated fatty acid elongation, and tetrahydrofolate synthesis that were down-regulated by ethanol alone. Because parts of these genes were known to be regulated by the constitutive androstane receptor (CAR), we performed the same experiment in the CAR-deficient mice. As a result, fatty liver was observed not only in the ethanol group but also with the ethanol plus polyphenol groups. In addition, there was no segregation of the gene expression profiles among these groups. These results provide a molecular basis for the prevention of alcohol-induced stress by the polyphenols in alcoholic beverages.
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Affiliation(s)
- Ruiqing Yao
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Akihito Yasuoka
- Department of Biological Engineering, Maebashi Institute of Technology, Maebashi-shi, Gunma, Japan
- Kanagawa Academy of Science and Technology, Takatsu-ku, Kawasaki-shi, Kanagawa, Japan
- * E-mail: (AY); (TM)
| | - Asuka Kamei
- Kanagawa Academy of Science and Technology, Takatsu-ku, Kawasaki-shi, Kanagawa, Japan
| | - Shota Ushiama
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
| | - Yoshinori Kitagawa
- Institute for Health Care Science, Suntory Wellness Ltd., Shimamoto-cho, Mishima-gun, Osaka, Japan
| | - Tomohiro Rogi
- Institute for Health Care Science, Suntory Wellness Ltd., Shimamoto-cho, Mishima-gun, Osaka, Japan
| | - Hiroshi Shibata
- Institute for Health Care Science, Suntory Wellness Ltd., Shimamoto-cho, Mishima-gun, Osaka, Japan
| | - Keiko Abe
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
- Kanagawa Academy of Science and Technology, Takatsu-ku, Kawasaki-shi, Kanagawa, Japan
| | - Takumi Misaka
- Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo, Japan
- * E-mail: (AY); (TM)
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Abstract
Organic anions and cations (OAs and OCs, respectively) comprise an extraordinarily diverse array of compounds of physiological, pharmacological, and toxicological importance. The kidney, primarily the renal proximal tubule, plays a critical role in regulating the plasma concentrations of these organic electrolytes and in clearing the body of potentially toxic xenobiotics agents, a process that involves active, transepithelial secretion. This transepithelial transport involves separate entry and exit steps at the basolateral and luminal aspects of renal tubular cells. Basolateral and luminal OA and OC transport reflects the concerted activity of a suite of separate proteins arranged in parallel in each pole of proximal tubule cells. The cloning of multiple members of several distinct transport families, the subsequent characterization of their activity, and their subcellular localization within distinct regions of the kidney, now allows the development of models describing the molecular basis of the renal secretion of OAs and OCs. New information on naturally occurring genetic variation of many of these processes provides insight into the basis of observed variability of drug efficacy and unwanted drug-drug interactions in human populations. The present review examines recent work on these issues.
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Affiliation(s)
- Ryan M Pelis
- Novartis Pharmaceuticals Corp., Translational Sciences, East Hanover, New Jersey, USA
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Koepsell H. The SLC22 family with transporters of organic cations, anions and zwitterions. Mol Aspects Med 2013; 34:413-35. [PMID: 23506881 DOI: 10.1016/j.mam.2012.10.010] [Citation(s) in RCA: 275] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2012] [Accepted: 08/18/2012] [Indexed: 12/14/2022]
Abstract
The SLC22 family contains 13 functionally characterized human plasma membrane proteins each with 12 predicted α-helical transmembrane domains. The family comprises organic cation transporters (OCTs), organic zwitterion/cation transporters (OCTNs), and organic anion transporters (OATs). The transporters operate as (1) uniporters which mediate facilitated diffusion (OCTs, OCTNs), (2) anion exchangers (OATs), and (3) Na(+)/zwitterion cotransporters (OCTNs). They participate in small intestinal absorption and hepatic and renal excretion of drugs, xenobiotics and endogenous compounds and perform homeostatic functions in brain and heart. Important endogeneous substrates include monoamine neurotransmitters, l-carnitine, α-ketoglutarate, cAMP, cGMP, prostaglandins, and urate. It has been shown that mutations of the SLC22 genes encoding these transporters cause specific diseases like primary systemic carnitine deficiency and idiopathic renal hypouricemia and are correlated with diseases such as Crohn's disease and gout. Drug-drug interactions at individual transporters may change pharmacokinetics and toxicities of drugs.
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Affiliation(s)
- Hermann Koepsell
- University of Würzburg, Institute of Anatomy and Cell Biology, Koellikerstr. 6, 97070 Würzburg, Germany.
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