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Wherley TJ, Thomas S, Millay DP, Saunders T, Roy S. Molecular regulation of myocyte fusion. Curr Top Dev Biol 2024; 158:53-82. [PMID: 38670716 DOI: 10.1016/bs.ctdb.2024.01.016] [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] [Indexed: 04/28/2024]
Abstract
Myocyte fusion is a pivotal process in the development and regeneration of skeletal muscle. Failure during fusion can lead to a range of developmental as well as pathological consequences. This review aims to comprehensively explore the intricate processes underlying myocyte fusion, from the molecular to tissue scale. We shed light on key players, such as the muscle-specific fusogens - Myomaker and Myomixer, in addition to some lesser studied molecules contributing to myocyte fusion. Conserved across vertebrates, Myomaker and Myomixer play a crucial role in driving the merger of plasma membranes of fusing myocytes, ensuring the formation of functional muscle syncytia. Our multiscale approach also delves into broader cell and tissue dynamics that orchestrate the timing and positioning of fusion events. In addition, we explore the relevance of muscle fusogens to human health and disease. Mutations in fusogen genes have been linked to congenital myopathies, providing unique insights into the molecular basis of muscle diseases. We conclude with a discussion on potential therapeutic avenues that may emerge from manipulating the myocyte fusion process to remediate skeletal muscle disorders.
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Affiliation(s)
- Tanner J Wherley
- Division of Molecular Cardiovascular Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States
| | - Serena Thomas
- Warwick Medical School, University of Warwick, Coventry, United Kingdom; Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Proteos, Singapore, Singapore
| | - Douglas P Millay
- Division of Molecular Cardiovascular Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, United States; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, United States.
| | - Timothy Saunders
- Warwick Medical School, University of Warwick, Coventry, United Kingdom; Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Proteos, Singapore, Singapore.
| | - Sudipto Roy
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Proteos, Singapore, Singapore; Department of Biological Sciences, National University of Singapore, Singapore, Singapore; Department of Pediatrics, National University of Singapore, Singapore, Singapore.
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2
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Sambharia M, Rastogi P, Thomas CP. Monogenic focal segmental glomerulosclerosis: A conceptual framework for identification and management of a heterogeneous disease. AMERICAN JOURNAL OF MEDICAL GENETICS. PART C, SEMINARS IN MEDICAL GENETICS 2022; 190:377-398. [PMID: 35894442 PMCID: PMC9796580 DOI: 10.1002/ajmg.c.31990] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Revised: 05/31/2022] [Accepted: 06/30/2022] [Indexed: 01/29/2023]
Abstract
Focal segmental glomerulosclerosis (FSGS) is not a disease, rather a pattern of histological injury occurring from a variety of causes. The exact pathogenesis has yet to be fully elucidated but is likely varied based on the type of injury and the primary target of that injury. However, the approach to treatment is often based on the degree of podocyte foot process effacement and clinical presentation without sufficient attention paid to etiology. In this regard, there are many monogenic causes of FSGS with variable presentation from nephrotic syndrome with histological features of primary podocytopathy to more modest degrees of proteinuria with limited evidence of podocyte foot process injury. It is likely that genetic causes are largely underdiagnosed, as the role and the timing of genetic testing in FSGS is not established and genetic counseling, testing options, and interpretation of genotype in the context of phenotype may be outside the scope of practice for both nephrologists and geneticists. Yet most clinicians believe that a genetic diagnosis can lead to targeted therapy, limit the use of high-dose corticosteroids as a therapeutic trial, and allow the prediction of the natural history and risk for recurrence in the transplanted kidney. In this manuscript, we emphasize that genetic FSGS is not monolithic in its presentation, opine on the importance of genetic testing and provide an algorithmic approach to deployment of genetic testing in a timely fashion when faced with a patient with FSGS.
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Affiliation(s)
- Meenakshi Sambharia
- Division of Nephrology, Department of Internal MedicineUniversity of IowaIowa CityIowaUSA
| | - Prerna Rastogi
- Department of PathologyUniversity of IowaIowa CityIowaUSA
| | - Christie P. Thomas
- Division of Nephrology, Department of Internal MedicineUniversity of IowaIowa CityIowaUSA,Department of PediatricsUniversity of IowaIowa CityIowaUSA,The Iowa Institute of Human GeneticsUniversity of IowaIowa CityIowaUSA,Medical ServiceVeterans Affairs Medical CenterIowa CityIowaUSA
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3
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Kostovska I, Trajkovska KT, Topuzovska S, Cekovska S, Labudovic D, Kostovski O, Spasovski G. Nephrinuria and podocytopathies. Adv Clin Chem 2022; 108:1-36. [PMID: 35659057 DOI: 10.1016/bs.acc.2021.08.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The discovery of nephrin in 1998 has launched a new era in glomerular diseases research, emphasizing its crucial role in the structure and function of the glomerular filtration barrier. In the past 20 years, substantial advances have been made in understanding podocyte structure and function as well as the discovery of several podocyte-related proteins including nephrin. The glomerular filtration barrier is comprised of podocytes, the glomerular basement membrane and endothelial cells. Podocytes, with their specialized slit diaphragm, form the essential backbone of the glomerular filtration barrier. Nephrin is a crucial structural and functional feature of the slit diaphragm that prevents plasma protein, blood cell and macromolecule leakage into the urine. Podocyte damage results in nephrin release. Podocytopathies are kidney diseases in which podocyte damage drives proteinuria, i.e., nephrotic syndrome. Many kidney diseases involve podocytopathy including congenital nephrotic syndrome of Finnish type, diffuse mesangial sclerosis, minimal change disease, focal segmental glomerulosclerosis, collapsing glomerulonephropathy, diabetic nephropathy, lupus nephropathy, hypertensive nephropathy and preeclampsia. Recently, urinary nephrin measurement has become important in the early detection of podocytopathies. In this chapter, we elaborate the main structural and functional features of nephrin as a podocyte-specific protein, pathomechanisms of podocytopathies which result in nephrinuria, highlight the most commonly used methods for detecting urinary nephrin and investigate the diagnostic, prognostic and potential therapeutic relevance of urinary nephrin in primary and secondary proteinuric kidney diseases.
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Affiliation(s)
- Irena Kostovska
- Department of Medical and Experimental Biochemistry, Faculty of Medicine, Ss. Cyril and Methodius University, Skopje, North Macedonia.
| | - Katerina Tosheska Trajkovska
- Department of Medical and Experimental Biochemistry, Faculty of Medicine, Ss. Cyril and Methodius University, Skopje, North Macedonia
| | - Sonja Topuzovska
- Department of Medical and Experimental Biochemistry, Faculty of Medicine, Ss. Cyril and Methodius University, Skopje, North Macedonia
| | - Svetlana Cekovska
- Department of Medical and Experimental Biochemistry, Faculty of Medicine, Ss. Cyril and Methodius University, Skopje, North Macedonia
| | - Danica Labudovic
- Department of Medical and Experimental Biochemistry, Faculty of Medicine, Ss. Cyril and Methodius University, Skopje, North Macedonia
| | - Ognen Kostovski
- University Clinic of Abdominal Surgery, Faculty of Medicine, Ss. Cyril and Methodius University, Skopje, North Macedonia
| | - Goce Spasovski
- University Clinic of Nephrology, Faculty of Medicine, Ss. Cyril and Methodius University, Skopje, North Macedonia
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4
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Cholelithiasis in infants with congenital nephrotic syndrome of the Finnish type. Pediatr Nephrol 2021; 36:3795-3798. [PMID: 34383124 DOI: 10.1007/s00467-021-05225-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Revised: 07/07/2021] [Accepted: 07/08/2021] [Indexed: 10/20/2022]
Abstract
BACKGROUND Congenital nephrotic syndrome of the Finnish type (CNF) caused by NPHS1 mutations is a rare disease. Infants with CNF can develop many complications, but hepatobiliary complications are uncommon. CNF is not reported as a risk factor of cholelithiasis, which is also a rare disease in the pediatric population. We herein present the cases of three infants with CNF diagnosed with gallstones among a total of seven children with CNF who were treated between 2010 and 2020 in our hospital. CASE-DIAGNOSIS/TREATMENT The gestational ages, birth weights, and ages at CNF diagnosis of cases 1, 2, and 3 were 38, 37, and 38 weeks; 2450, 2374, and 3120 g; and 25, 3, and 31 days of age, respectively. Imaging studies at the time of CNF diagnosis revealed asymptomatic gallstones in each of them. Case 1 patient developed incarcerated choledocholithiasis and presented with vomiting, white stool, and critically prolonged coagulation at 7 months of age. The gallstones disappeared at 3 months of age in case 2, although they remained in cases 1 and 3 at the last observation. CONCLUSIONS Infants with CNF can develop cholelithiasis and should undergo hepatobiliary ultrasonography at the time of diagnosis. Patients with gallstones should be evaluated for signs of potential gallstone incarceration because of the risk of hemorrhagic complications due to cholestasis with subsequent vitamin K deficiency and treatment with anticoagulation agents.
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5
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Güngör T, Eroğlu FK, Kargın Çakıcı E, Yazılıtaş F, Can G, Çelikkaya E, Karakaya D, Kurt Şükür ED, Özaltın F, Yağız B, Bülbül M. Gastric duplication cyst in an infant with Finnish-type congenital nephrotic syndrome: concurrence or coincidence? Acta Clin Belg 2021; 76:155-157. [PMID: 31587616 DOI: 10.1080/17843286.2019.1675333] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Congenital nephrotic syndrome (CNS) is a rare disorder characterized by massive proteinuria and marked edema manifesting in utero or during the first 3 months of life. CNS can be caused by congenital infections, allo-immune maternal disease or due to the genetic defects of podocyte proteins most commonly NPHS1. Here we present a case of Finnish-type congenital nephrotic syndrome along with feeding problems and abdominal distention which was diagnosed during follow-up as a gastric-duplication cyst with a novel mutation in the nephrin gene. CNS feeding problems are attributed mainly to primary disease but in literature there are case reports of patients with CNS and hypertrophic pyloric stenosis. NPHS1 is also expressed in the stomach tissue. Physicians should be aware of this rare extra-renal manifestation or coincidence of this rare disease.
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Affiliation(s)
- Tülin Güngör
- Department of Pediatric Nephrology, Dr Sami Ulus Maternity and Child Health and Diseases Training and Research Hospital, Ankara, Turkey
| | - Fehime Kara Eroğlu
- Department of Pediatric Nephrology, Dr Sami Ulus Maternity and Child Health and Diseases Training and Research Hospital, Ankara, Turkey
| | - Evrim Kargın Çakıcı
- Department of Pediatric Nephrology, Dr Sami Ulus Maternity and Child Health and Diseases Training and Research Hospital, Ankara, Turkey
| | - Fatma Yazılıtaş
- Department of Pediatric Nephrology, Dr Sami Ulus Maternity and Child Health and Diseases Training and Research Hospital, Ankara, Turkey
| | - Gökçe Can
- Department of Pediatric Nephrology, Dr Sami Ulus Maternity and Child Health and Diseases Training and Research Hospital, Ankara, Turkey
| | - Evra Çelikkaya
- Department of Pediatric Nephrology, Dr Sami Ulus Maternity and Child Health and Diseases Training and Research Hospital, Ankara, Turkey
| | - Deniz Karakaya
- Department of Pediatric Nephrology, Dr Sami Ulus Maternity and Child Health and Diseases Training and Research Hospital, Ankara, Turkey
| | - Eda Didem Kurt Şükür
- Department of Pediatric Nephrology, Dr Sami Ulus Maternity and Child Health and Diseases Training and Research Hospital, Ankara, Turkey
| | - Fatih Özaltın
- Department of Pediatric Nephrology, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Beytullah Yağız
- Department of Pediatric Surgery, Dr Sami Ulus Maternity and Child Health and Diseases Training and Research Hospital, Ankara, Turkey
| | - Mehmet Bülbül
- Department of Pediatric Nephrology, Dr Sami Ulus Maternity and Child Health and Diseases Training and Research Hospital, Ankara, Turkey
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6
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Zhang Z, Tang S, Gui W, Lin X, Zheng F, Wu F, Li H. Liver X receptor activation induces podocyte injury via inhibiting autophagic activity. J Physiol Biochem 2020; 76:317-328. [PMID: 32328877 DOI: 10.1007/s13105-020-00737-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Accepted: 03/17/2020] [Indexed: 12/27/2022]
Abstract
Podocyte injury plays a key role in the occurrence and development of kidney diseases. Decreased autophagic activity in podocyte is closely related to its injury and the occurrence of proteinuria. Liver X receptors (LXRs), as metabolic nuclear receptors, participate in multiple pathophysiological processes and express in several tissues, including podocytes. Although the functional roles of LXRs in the liver, adipose tissue and intestine are well established; however, the effect of LXRs on podocytes function remains unclear. In this study, we used mouse podocytes cell line to investigate the effects of LXR activation on podocytes autophagy level and related signaling pathway by performing Western blotting, RT-PCR, GFP-mRFP-LC3 transfection, and immunofluorescence staining. Then, we tested this effect in STZ-induced diabetic mice. Transmission electron microscopy and immunohistochemistry were employed to explore the effects of LXR activation on podocytes function and autophagic activity. We found that LXR activation could inhibit autophagic flux through blocking the formation of autophagosome in podocytes in vitro which was possibly achieved by affecting AMPK, mTOR, and SIRT1 signaling pathways. Furthermore, LXR activation in vivo induced autophagy suppression in glomeruli, leading to aggravated podocyte injury. In summary, our findings indicated that activation of LXRs induced autophagy suppression, which in turn contributed to the podocyte injury.
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Affiliation(s)
- Ziyi Zhang
- Department of Endocrinology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, No. 3 Qingchun East Road, Hangzhou, 310016, China
| | - Shengjie Tang
- Department of Endocrinology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, No. 3 Qingchun East Road, Hangzhou, 310016, China
| | - Weiwei Gui
- Department of Endocrinology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, No. 3 Qingchun East Road, Hangzhou, 310016, China
| | - Xihua Lin
- Department of Endocrinology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, No. 3 Qingchun East Road, Hangzhou, 310016, China
| | - Fenping Zheng
- Department of Endocrinology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, No. 3 Qingchun East Road, Hangzhou, 310016, China
| | - Fang Wu
- Department of Endocrinology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, No. 3 Qingchun East Road, Hangzhou, 310016, China
| | - Hong Li
- Department of Endocrinology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, No. 3 Qingchun East Road, Hangzhou, 310016, China.
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7
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Lee HJ, Gonzalez O, Dick EJ, Donati A, Feliers D, Choudhury GG, Ross C, Venkatachalam M, Tardif SD, Kasinath BS. Marmoset as a Model to Study Kidney Changes Associated With Aging. J Gerontol A Biol Sci Med Sci 2019; 74:315-324. [PMID: 30321310 DOI: 10.1093/gerona/gly237] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Indexed: 12/15/2022] Open
Abstract
We evaluated whether the marmoset, a nonhuman primate, can serve as a good model to study aging-related changes in the kidney by employing healthy young and aged marmosets of both sexes. Aging was associated with glomerulosclerosis, interstitial fibrosis, and arteriolosclerosis in both sexes; correspondingly, the content of matrix proteins was increased. Functionally, aging resulted in an increase in urinary albumin and protein excretion. There was a robust correlation between markers of fibrosis and functional changes. We explored signaling pathways as potential mechanistic events. Aging in males, but not in females, was associated with reduced renal cortical activity of AMP-activated protein kinase (AMPK) and a trend toward activation of mechanistic target of rapamycin complex 1 (mTORC1); upstream of AMPK and mTORC1, Akt and IGF-1 receptor were activated. In both sexes, aging promoted kidney activation of transforming growth factor β-1 signaling pathway. While the expression of cystathionine β-synthase (CBS), an enzyme involved hydrogen sulfide (H2S) synthesis, was reduced in both aged males and females, decreased H2S generation was seen in only males. Our studies show that the marmoset is a valid model to study kidney aging; some of the signaling pathways involved in renal senescence differ between male and female marmosets.
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Affiliation(s)
- Hak Joo Lee
- Department of Medicine, University of Texas Health, Long School of Medicine, San Antonio
| | - Olga Gonzalez
- Southwest National Primate Research Center, San Antonio, Texas
| | - Edward J Dick
- Southwest National Primate Research Center, San Antonio, Texas
| | - Andrew Donati
- Department of Medicine, University of Texas Health, Long School of Medicine, San Antonio
| | - Denis Feliers
- Department of Medicine, University of Texas Health, Long School of Medicine, San Antonio
| | - Goutam Ghosh Choudhury
- Department of Medicine, University of Texas Health, Long School of Medicine, San Antonio.,Geriatric Research Education, and Clinical Center (GRECC), South Texas Veterans Health Care System, San Antonio
| | - Corinna Ross
- Department of Biology, Texas A & M University, San Antonio
| | - Manjeri Venkatachalam
- Department of Pathology, University of Texas Health, Long School of Medicine, San Antonio
| | - Suzette D Tardif
- Southwest National Primate Research Center, San Antonio, Texas.,Barshop Institute for Longevity and Aging Studies, San Antonio, Texas
| | - Balakuntalam S Kasinath
- Department of Medicine, University of Texas Health, Long School of Medicine, San Antonio.,Geriatric Research Education, and Clinical Center (GRECC), South Texas Veterans Health Care System, San Antonio.,Barshop Institute for Longevity and Aging Studies, San Antonio, Texas
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8
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He M, Wang J, Yin Z, Zhao Y, Hou H, Fan J, Li H, Wen Z, Tang J, Wang Y, Wang DW, Chen C. MiR-320a induces diabetic nephropathy via inhibiting MafB. Aging (Albany NY) 2019; 11:3055-3079. [PMID: 31102503 PMCID: PMC6555468 DOI: 10.18632/aging.101962] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2018] [Accepted: 05/06/2019] [Indexed: 12/17/2022]
Abstract
Multiple studies indicate that microRNAs (miRNAs) are involved in diabetes. However, the roles of miRNA in the target organ damages in diabetes remain unclear. This study investigated the functions of miR-320a in diabetic nephropathy (DN). In this study, db/db mice were used to observe the changes in podocytes and their function in vivo, as well as in cultured mouse podocyte cells (MPC5) exposed to high glucose in vitro. To further explore the role of miR-320a in DN, recombinant adeno-associated viral particle was administered intravenously to manipulate the expression of miR-320a in db/db mice. Overexpression of miR-320a markedly promoted podocyte loss and dysfunction in DN, including mesangial expansion and increased levels of proteinuria, serum creatinine and urea nitrogen. Furthermore, MafB was identified as a direct target of miR-320a through AGO2 co-immunoprecipitation, luciferase reporter assay, and Western blotting. Moreover, re-expression of MafB rescued miR-320a-induced podocyte loss and dysfunction by upregulating the expressions of Nephrin and glutathione peroxidase 3 (Gpx3). Our data indicated that miR-320a aggravated renal disfunction in DN by targeting MafB and downregulating Nephrin and Gpx3 in podocytes, which suggested that miR-320a could be a potential therapeutic target of diabetic nephropathy.
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Affiliation(s)
- Mengying He
- Division of Cardiology and Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Jin Wang
- Division of Cardiology and Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Zhongwei Yin
- Division of Cardiology and Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Yanru Zhao
- Division of Cardiology and Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Huiying Hou
- Division of Cardiology and Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Jiahui Fan
- Division of Cardiology and Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Huaping Li
- Division of Cardiology and Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Zheng Wen
- Division of Cardiology and Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Jiarong Tang
- Division of Cardiology and Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Yan Wang
- Division of Cardiology and Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Dao Wen Wang
- Division of Cardiology and Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Chen Chen
- Division of Cardiology and Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
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9
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APOL1 risk variants cause podocytes injury through enhancing endoplasmic reticulum stress. Biosci Rep 2018; 38:BSR20171713. [PMID: 29967295 PMCID: PMC6131197 DOI: 10.1042/bsr20171713] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Revised: 06/12/2018] [Accepted: 07/02/2018] [Indexed: 12/31/2022] Open
Abstract
Two coding sequence variants (G1 and G2) of Apolipoprotein L1 (APOL1) gene have been implicated as a higher risk factor for chronic kidney diseases (CKD) in African Americans when compared with European Americans. Previous studies have suggested that the APOL1 G1 and G2 variant proteins are more toxic to kidney cells than the wild-type APOL1 G0, but the underlying mechanisms are poorly understood. To determine whether endoplasmic reticulum (ER) stress contributes to podocyte toxicity, we generated human podocytes (HPs) that stably overexpressed APOL1 G0, G1, or G2 (Vec/HPs, G0/HPs, G1/HPs, and G2/HPs). Propidium iodide staining showed that HP overexpressing the APOL1 G1 or G2 variant exhibited a higher rate of necrosis when compared with those overexpressing the wild-type G0 counterpart. Consistently, the expression levels of nephrin and podocin proteins were significantly decreased in the G1- or G2-overexpressing cells despite the maintenance of their mRNA expressions levels. In contrast, the expression of the 78-kDa glucose-regulated protein ((GRP78), also known as the binding Ig protein, BiP) and the phosphorylation of the eukaryotic translation initiation factor 1 (eIF1) were significantly elevated in the G1/HPs and G2/HPs, suggesting a possible occurrence of ER stress in these cells. Furthermore, ER stress inhibitors not only restored nephrin protein expression, but also provided protection against necrosis in G1/HPs and G2/HPs, suggesting that APOL1 risk variants cause podocyte injury partly through enhancing ER stress.
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10
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Samadi M, Shirpoor A, Afshari AT, Kheradmand F, Rasmi Y, Sadeghzadeh M. Chronic ethanol ingestion induces glomerular filtration barrier proteins genes expression alteration and increases matrix metalloproteinases activity in the kidney of rats. Interv Med Appl Sci 2018; 10:171-177. [PMID: 30713757 PMCID: PMC6343583 DOI: 10.1556/1646.10.2018.23] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Abstract
Background Chronic alcohol ingestion-induced kidney structure and function alterations are very well known, but the precise underlying molecular mediators involved in ethanol-induced kidney abnormalities remain elusive. The aim of this study was to investigate the effect of chronic ethanol exposure on matrix metalloproteinase 2, 9 (MMP), glomerular filtration barrier proteins (nephrin and podocin), as well as vascular endothelial growth factor receptor 1, 2 (VEGFRs) isoforms gene expression in the kidney of rats. Methods Sixteen male Wistar rats with an initial body weight of 220 ± 10 g were divided into the following two groups: (1) control and (2) ethanol (4.5 g/kg BW). Results After 6 weeks of treatment, the results revealed a significant increase in isoforms VEGFR1 and VEGFR2 of VEGFR gene expression, significant increases of MMP2 and MMP9 activities, as well as significant decrease of nephrin and podocin gene expressions in the ethanol group, compared with that in the control group. Conclusion These findings indicate that ethanol-induced kidney abnormalities may be in part associated with alteration in expressions of VEGFRs, nephrin, and podocin and in increasing activities of MMP2 and MMP9 as key molecular mediators in the kidney function.
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Affiliation(s)
- Mahrokh Samadi
- Faculty of Medicine, Department of Physiology, Urmia University of Medical Sciences, Urmia, Iran.,Nephrology and Kidney Transplant Research Center, Urmia University of Medical Sciences, Urmia, Iran
| | - Alireza Shirpoor
- Faculty of Medicine, Department of Physiology, Urmia University of Medical Sciences, Urmia, Iran.,Nephrology and Kidney Transplant Research Center, Urmia University of Medical Sciences, Urmia, Iran
| | - Ali Taghizadeh Afshari
- Nephrology and Kidney Transplant Research Center, Urmia University of Medical Sciences, Urmia, Iran
| | - Fatemeh Kheradmand
- Faculty of Medicine, Department of Biochemistry, Urmia University of Medical Sciences, Urmia, Iran
| | - Yousef Rasmi
- Faculty of Medicine, Department of Biochemistry, Urmia University of Medical Sciences, Urmia, Iran
| | - Maryam Sadeghzadeh
- Faculty of Medicine, Department of Physiology, Urmia University of Medical Sciences, Urmia, Iran
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Abstract
Neonatal nephron loss may follow hypoxic-ischemic events or nephrotoxic medications. Its long-term effects on the kidney are still unclear. Unlike term infants, preterm neonates less than 36 weeks gestational age show ongoing nephrogenesis. We hypothesized that nephron loss during nephrogenesis leads to more severe renal sequelae than nephron loss shortly after the completion of nephrogenesis. Rats show nephrogenesis until day 10 of life resembling the situation of preterm infants. Animals were uninephrectomized at day 1 (UNX d1) resulting in nephron reduction during nephrogenesis and at day 14 of life (UNX d14) inducing nephron loss after the completion of nephrogenesis. 28 days after uninephrectomy the compensatory renal growth was higher in UNX d1 compared to UNX d14. Nephrin was reduced and collagen deposition increased in UNX d1. At 1 year of age, glomerulosclerosis and markers of tubulointerstitial damage were most prevalent in UNX d1. Moreover, the number of desmin-positive podocytes was higher and nephrin was reduced in UNX d1 indicating podocyte damage. Infiltration of inflammatory cells was heightened after UNX d1. Uninephrectomized animals showed no arterial hypertension. We conclude that neonatal nephron loss during active nephrogenesis leads to more severe glomerular and tubulointerstitial damage, which is not a consequence of compensatory arterial hypertension.
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12
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Martin CE, Jones N. Nephrin Signaling in the Podocyte: An Updated View of Signal Regulation at the Slit Diaphragm and Beyond. Front Endocrinol (Lausanne) 2018; 9:302. [PMID: 29922234 PMCID: PMC5996060 DOI: 10.3389/fendo.2018.00302] [Citation(s) in RCA: 81] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Accepted: 05/22/2018] [Indexed: 12/11/2022] Open
Abstract
Podocytes are a major component of the glomerular blood filtration barrier, and alterations to the morphology of their unique actin-based foot processes (FP) are a common feature of kidney disease. Adjacent FP are connected by a specialized intercellular junction known as the slit diaphragm (SD), which serves as the ultimate barrier to regulate passage of macromolecules from the blood. While the link between SD dysfunction and reduced filtration selectivity has been recognized for nearly 50 years, our understanding of the underlying molecular circuitry began only 20 years ago, sparked by the identification of NPHS1, encoding the transmembrane protein nephrin. Nephrin not only functions as the core component of the extracellular SD filtration network but also as a signaling scaffold via interactions at its short intracellular region. Phospho-regulation of several conserved tyrosine residues in this region influences signal transduction pathways which control podocyte cell adhesion, shape, and survival, and emerging studies highlight roles for nephrin phospho-dynamics in mechanotransduction and endocytosis. The following review aims to summarize the last 5 years of advancement in our knowledge of how signaling centered at nephrin directs SD barrier formation and function. We further provide insight on promising frontiers in podocyte biology, which have implications for SD signaling in the healthy and diseased kidney.
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Yang X, Wu D, Du H, Nie F, Pang X, Xu Y. MicroRNA-135a is involved in podocyte injury in a transient receptor potential channel 1-dependent manner. Int J Mol Med 2017; 40:1511-1519. [PMID: 28949388 PMCID: PMC5627871 DOI: 10.3892/ijmm.2017.3152] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2016] [Accepted: 09/18/2017] [Indexed: 12/03/2022] Open
Abstract
Transient receptor potential (TRP) cation channels are essential for normal cellular physiology, and their abnormal expression may lead to a number of disorders, including podocytopathy. Therefore, it is crucial to understand the mechanisms underlying the regulation of TRP channels. In the present study, microRNA (miR)-135a was found to be upregulated in patients with focal segmental glomerulosclerosis and mice treated with adriamycin (ADR). In cultured podocytes, transforming growth factor (TGF)-β and ADR were found to promote miR-135a expression. Conversely, TRP channel 1 (TRPC1) protein levels were markedly downregulated in podocytes from mice treated with ADR, as well as in cultured podocytes treated with ADR and TGF-β. Ectopic expression of miR-135a led to severe podocyte injury and disarray of the podocyte cytoskeleton, whereas podocyte-specific expression of TRPC1 was able to reverse the pathological effects of miR-135a in cultured podocytes. Moreover, using Luciferase reporter assays and western blot analysis, TRPC1 was identified as a target gene of miR-135a. To the best of our knowledge, this is the first study to demonstrate the role of TRPC1 in the development of podocyte injury and disorders of the podocyte cytoskeleton, which may contribute to the development of novel therapeutics for podocyte injury-associated kidney diseases.
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Affiliation(s)
- Xianggui Yang
- Department of Laboratory Medicine, The First Affiliated Hospital of Chengdu Medical University, Chengdu, Sichuan 610500, P.R. China
| | - Dongming Wu
- Department of Laboratory Medicine, The First Affiliated Hospital of Chengdu Medical University, Chengdu, Sichuan 610500, P.R. China
| | - Hongfei Du
- Department of Laboratory Medicine, The First Affiliated Hospital of Chengdu Medical University, Chengdu, Sichuan 610500, P.R. China
| | - Fang Nie
- Department of Laboratory Medicine, The First Affiliated Hospital of Chengdu Medical University, Chengdu, Sichuan 610500, P.R. China
| | - Xueli Pang
- Department of Laboratory Medicine, The First Affiliated Hospital of Chengdu Medical University, Chengdu, Sichuan 610500, P.R. China
| | - Ying Xu
- Department of Laboratory Medicine, The First Affiliated Hospital of Chengdu Medical University, Chengdu, Sichuan 610500, P.R. China
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Takahashi T, Sato Y, Yamazaki T, Hayashi A, Okamoto T. Vomiting in infant with congenital nephrotic syndrome: Answers. Pediatr Nephrol 2017; 32:1521-1523. [PMID: 27757586 DOI: 10.1007/s00467-016-3532-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2016] [Revised: 09/23/2016] [Accepted: 09/24/2016] [Indexed: 02/07/2023]
Affiliation(s)
- Toshiyuki Takahashi
- Department of Pediatrics, Hokkaido University Hospital, Kita 15-jo Nishi 7-Chome, Kita Ward, Sapporo City, Hokkaido, Japan.
| | - Yasuyuki Sato
- Department of Pediatrics, Hokkaido University Hospital, Kita 15-jo Nishi 7-Chome, Kita Ward, Sapporo City, Hokkaido, Japan
| | - Takeshi Yamazaki
- Department of Pediatrics, Hokkaido University Hospital, Kita 15-jo Nishi 7-Chome, Kita Ward, Sapporo City, Hokkaido, Japan
| | - Asako Hayashi
- Department of Pediatrics, Hokkaido University Hospital, Kita 15-jo Nishi 7-Chome, Kita Ward, Sapporo City, Hokkaido, Japan
| | - Takayuki Okamoto
- Department of Pediatrics, Hokkaido University Hospital, Kita 15-jo Nishi 7-Chome, Kita Ward, Sapporo City, Hokkaido, Japan
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Kostovska I, Trajkovska KT, Cekovska S, Spasovski G, Labudovic D. Nephrin and Podocalyxin - New Podocyte Proteins for Early Detection of Secondary Nephropathies. BANTAO JOURNAL 2017. [DOI: 10.1515/bj-2016-0003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Abstract
In the last two decades a great progress was observed in understanding of podocytes, their specific structure and function identifying many specific podocyte proteins, such as nephrin and podocalyxin. Podocytes form the final barrier to plasma proteins leakage. Nephrin as a main component of the filtration diaphragm forms a physical barrier while podocalyxin as sialoglycoprotein forms an electrostatic barrier. Podocyte damage, i.e. podocytopathies and their loss through urine-podocyturia, are crucial in pathogenesis and progression of nephropathies with proteinuria as main clinical manifestation. In podocytopathies, nephrin and podocalyxin appear in the urine before proteinuria and microalbuminuria which were previously considered as earliest markers of nephropathies. Nephrinuria and podocalyxuria indicate damage of the podocytes on glomerular level and/or presence of apoptotic and necrotic podocytes in urine. These urinary markers are also important in early diagnosis of secondary nephropathies such as diabetic, lupus and hypertensive nephropathy as the most common causes of end-stage renal failure (ESRF). These markers are also important in the prediction of preeclampsia, which is the most common complication in pregnancy. In this review we elaborate in dept the main structural and functional features of podocytes and their specific proteins, nephrin and podocalyxin, summarizing the recent literature data on their importance in the early diagnosis of the most common secondary nephropathies.
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Affiliation(s)
- Irena Kostovska
- Department of Medical and Experimental Biochemistry, Skopje , Republic of Macedonia
| | | | - Svetlana Cekovska
- Department of Medical and Experimental Biochemistry, Skopje , Republic of Macedonia
| | - Goce Spasovski
- Department of Nephrology, Medical Faculty, Skopje, University "Ss Cyril and Methodius", Skopje , Republic of Macedonia
| | - Danica Labudovic
- Department of Medical and Experimental Biochemistry, Skopje , Republic of Macedonia
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Leppert U, Gillespie A, Orphal M, Böhme K, Plum C, Nagorsen K, Berkholz J, Kreutz R, Eisenreich A. The impact of α-Lipoic acid on cell viability and expression of nephrin and ZNF580 in normal human podocytes. Eur J Pharmacol 2017; 810:1-8. [PMID: 28606850 DOI: 10.1016/j.ejphar.2017.06.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2017] [Revised: 06/07/2017] [Accepted: 06/08/2017] [Indexed: 02/04/2023]
Abstract
Human podocytes (hPC) are essential for maintaining normal kidney function and dysfunction or loss of hPC play a pivotal role in the manifestation and progression of chronic kidney diseases including diabetic nephropathy. Previously, α-Lipoic acid (α-LA), a licensed drug for treatment of diabetic neuropathy, was shown to exhibit protective effects on diabetic nephropathy in vivo. However, the effect of α-LA on hPC under non-diabetic conditions is unknown. Therefore, we analyzed the impact of α-LA on cell viability and expression of nephrin and zinc finger protein 580 (ZNF580) in normal hPC in vitro. Protein analyses were done via Western blot techniques. Cell viability was determined using a functional assay. hPC viability was dynamically modulated via α-LA stimulation in a concentration-dependent manner. This was associated with reduced nephrin and ZNF580 expression and increased nephrin phosphorylation in normal hPC. Moreover, α-LA reduced nephrin and ZNF580 protein expression via 'kappa-light-chain-enhancer' of activated B-cells (NF-κB) inhibition. These data demonstrate that low α-LA had no negative influence on hPC viability, whereas, high α-LA concentrations induced cytotoxic effects on normal hPC and reduced nephrin and ZNF580 expression via NF-κB inhibition. These data provide first novel information about potential cytotoxic effects of α-LA on hPC under non-diabetic conditions.
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Affiliation(s)
- Ulrike Leppert
- Charité-Universitätsmedizin Berlin, CC02, Institut für Physiologie, Berlin, Germany
| | - Allan Gillespie
- Charité-Universitätsmedizin Berlin, CC04, Institut für Klinische Pharmakologie und Toxikologie, Berlin, Germany
| | - Miriam Orphal
- Charité-Universitätsmedizin Berlin, CC04, Institut für Klinische Pharmakologie und Toxikologie, Berlin, Germany
| | - Karen Böhme
- Charité-Universitätsmedizin Berlin, CC04, Institut für Klinische Pharmakologie und Toxikologie, Berlin, Germany
| | - Claudia Plum
- Charité-Universitätsmedizin Berlin, CC04, Institut für Klinische Pharmakologie und Toxikologie, Berlin, Germany
| | - Kaj Nagorsen
- Charité-Universitätsmedizin Berlin, CC02, Institut für Physiologie, Berlin, Germany
| | - Janine Berkholz
- Charité-Universitätsmedizin Berlin, CC02, Institut für Physiologie, Berlin, Germany
| | - Reinhold Kreutz
- Charité-Universitätsmedizin Berlin, CC04, Institut für Klinische Pharmakologie und Toxikologie, Berlin, Germany
| | - Andreas Eisenreich
- Charité-Universitätsmedizin Berlin, CC04, Institut für Klinische Pharmakologie und Toxikologie, Berlin, Germany.
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Lan X, Lederman R, Eng JM, Shoshtari SSM, Saleem MA, Malhotra A, Singhal PC. Nicotine Induces Podocyte Apoptosis through Increasing Oxidative Stress. PLoS One 2016; 11:e0167071. [PMID: 27907022 PMCID: PMC5132002 DOI: 10.1371/journal.pone.0167071] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Accepted: 10/20/2016] [Indexed: 12/15/2022] Open
Abstract
Background Cigarette smoking plays an important role in the progression of chronic kidney disease (CKD). Nicotine, one of the major components of cigarette smoking, has been demonstrated to increase proliferation of renal mesangial cells. In this study, we examined the effect of nicotine on podocyte injury. Methods To determine the expression of nicotinic acetylcholine receptors (nAChR subunits) in podocytes, cDNAs and cell lysate of cultured human podocytes were used for the expression of nAChR mRNAs and proteins, respectively; and mouse renal cortical sections were subjected to immunofluorescant staining. We also studied the effect of nicotine on podocyte nephrin expression, reactive oxygen species (ROS) generation (via DCFDA loading followed by fluorometric analysis), proliferation, and apoptosis (morphologic assays). We evaluated the effect of nicotine on podocyte downstream signaling including phosphorylation of ERK1/2, JNK, and p38 and established causal relationships by using respective inhibitors. We used nAChR antagonists to confirm the role of nicotine on podocyte injury. Results Human podocytes displayed robust mRNA and protein expression of nAChR in vitro studies. In vivo studies, mice renal cortical sections revealed co-localization of nAChRs along with synaptopodin. In vitro studies, nephrin expression in podocyte was decreased by nicotine. Nicotine stimulated podocyte ROS generation; nonetheless, antioxidants such as N-acetyl cysteine (NAC) and TEMPOL (superoxide dismutase mimetic agent) inhibited this effect of nicotine. Nicotine did not modulate proliferation but promoted apoptosis in podocytes. Nicotine enhanced podocyte phosphorylation of ERK1/2, JNK, and p38, and their specific inhibitors attenuated nicotine-induced apoptosis. nAChR antagonists significantly suppressed the effects of nicotine on podocyte. Conclusions Nicotine induces podocyte apoptosis through ROS generation and associated downstream MAPKs signaling. The present study provides insight into molecular mechanisms involved in smoking associated progression of chronic kidney disease.
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Affiliation(s)
- Xiqian Lan
- Renal Molecular Research Laboratory, Feinstein Institute for Medical Research, Hofstra North Shore LIJ Medical School, New York, United States of America
- * E-mail: (XL); (PS)
| | - Rivka Lederman
- Renal Molecular Research Laboratory, Feinstein Institute for Medical Research, Hofstra North Shore LIJ Medical School, New York, United States of America
| | - Judith M. Eng
- Renal Molecular Research Laboratory, Feinstein Institute for Medical Research, Hofstra North Shore LIJ Medical School, New York, United States of America
| | - Seyedeh Shadafarin Marashi Shoshtari
- Renal Molecular Research Laboratory, Feinstein Institute for Medical Research, Hofstra North Shore LIJ Medical School, New York, United States of America
| | - Moin A. Saleem
- Academic Renal Unit, Southmead Hospital, Bristol, United Kingdom
| | - Ashwani Malhotra
- Renal Molecular Research Laboratory, Feinstein Institute for Medical Research, Hofstra North Shore LIJ Medical School, New York, United States of America
| | - Pravin C. Singhal
- Renal Molecular Research Laboratory, Feinstein Institute for Medical Research, Hofstra North Shore LIJ Medical School, New York, United States of America
- * E-mail: (XL); (PS)
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18
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Hu SY, Jia XY, Li JN, Zheng X, Ao J, Liu G, Cui Z, Zhao MH. T cell infiltration is associated with kidney injury in patients with anti-glomerular basement membrane disease. SCIENCE CHINA-LIFE SCIENCES 2016; 59:1282-1289. [PMID: 27080546 DOI: 10.1007/s11427-016-5030-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2015] [Accepted: 01/06/2016] [Indexed: 10/22/2022]
Abstract
Cell-mediated autoimmunity, particularly that involving autoreactive T cells, participates in mediating anti-glomerular basement membrane (GBM) disease. However, direct kidney injury mediated by renal infiltrated T cells has not been clearly elucidated in humans. The T cell profile (CD3, CD4, CD8, IL-17, and foxp3) and macrophage (CD68) were examined by immunohistochemistry on renal biopsy tissues from 13 patients with anti-GBM disease. The correlation between cell infiltration and clinical data was also analyzed. We found that the distribution of T cell infiltration was predominant in the peri-glomerular and interstitial areas. CD3+ T cell infiltratrion around the glomeruli with cellular crescent formations was significantly higher than that around the glomeruli with mild mesangial proliferation. CD8+ T cells significantly accumulated around the glomeruli with cellular crescents without IgG deposits compared to those with IgG deposits. The prevalence of infiltrating CD8+ T cells was correlated with the percentage of ruptured Bowman's capsules. In conclusion, cellular immunity may play a crucial role in the inflammatory kidney injury in anti-GBM patients. The periglomerular infiltration of T cells, especially CD8+ T cells, may participate in the pathogenic mechanism of glomerular damage.
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Affiliation(s)
- Shui-Yi Hu
- Renal Division, Department of Medicine, Peking University First Hospital; Institute of Nephrology, Peking University; Key Laboratory of Renal Disease, Ministry of Health of China; Key Laboratory of CKD Prevention and Treatment, Ministry of Education of China, Beijing, 100034, China.,Department of Nephrology, Tianjin Medical University General Hospital, Tianjin, 300052, China
| | - Xiao-Yu Jia
- Renal Division, Department of Medicine, Peking University First Hospital; Institute of Nephrology, Peking University; Key Laboratory of Renal Disease, Ministry of Health of China; Key Laboratory of CKD Prevention and Treatment, Ministry of Education of China, Beijing, 100034, China
| | - Jian-Nan Li
- Renal Division, Department of Medicine, Peking University First Hospital; Institute of Nephrology, Peking University; Key Laboratory of Renal Disease, Ministry of Health of China; Key Laboratory of CKD Prevention and Treatment, Ministry of Education of China, Beijing, 100034, China
| | - Xin Zheng
- Renal Division, Department of Medicine, Peking University First Hospital; Institute of Nephrology, Peking University; Key Laboratory of Renal Disease, Ministry of Health of China; Key Laboratory of CKD Prevention and Treatment, Ministry of Education of China, Beijing, 100034, China
| | - Jie Ao
- Renal Division, Department of Medicine, Peking University First Hospital; Institute of Nephrology, Peking University; Key Laboratory of Renal Disease, Ministry of Health of China; Key Laboratory of CKD Prevention and Treatment, Ministry of Education of China, Beijing, 100034, China
| | - Gang Liu
- Renal Division, Department of Medicine, Peking University First Hospital; Institute of Nephrology, Peking University; Key Laboratory of Renal Disease, Ministry of Health of China; Key Laboratory of CKD Prevention and Treatment, Ministry of Education of China, Beijing, 100034, China
| | - Zhao Cui
- Renal Division, Department of Medicine, Peking University First Hospital; Institute of Nephrology, Peking University; Key Laboratory of Renal Disease, Ministry of Health of China; Key Laboratory of CKD Prevention and Treatment, Ministry of Education of China, Beijing, 100034, China.
| | - Ming-Hui Zhao
- Renal Division, Department of Medicine, Peking University First Hospital; Institute of Nephrology, Peking University; Key Laboratory of Renal Disease, Ministry of Health of China; Key Laboratory of CKD Prevention and Treatment, Ministry of Education of China, Beijing, 100034, China.,Peking-Tsinghua Center for Life Sciences, Beijing, 100871, China
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MiR-30a Inhibits the Epithelial--Mesenchymal Transition of Podocytes through Downregulation of NFATc3. Int J Mol Sci 2015; 16:24032-47. [PMID: 26473838 PMCID: PMC4632736 DOI: 10.3390/ijms161024032] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2015] [Revised: 08/31/2015] [Accepted: 09/29/2015] [Indexed: 11/20/2022] Open
Abstract
MicroRNAs (miRNAs) possess an important regulating effect among numerous renal diseases, while their functions in the process of epithelial-to-mesenchymal transition (EMT) after podocyte injury remain unclear. The purpose of our study is to identify the potential functions of miR-30a in EMT of podocytes and explore the underlying mechanisms of miR-30a in the impaired podocytes. The results revealed that downregulation of miR-30a in podocyte injury animal models and patients, highly induced the mesenchymal markers of EMT including Collagen I, Fibronectin and Snail. Furthermore, overexpression of miR-30a enhances epithelial markers (E-cadherin) but diminished mesenchymal markers (Collagen I, Fibronectin and Snail) in podocytes. In addition, we established miR-30a target NFATc3, an important transcription factor of Non-canonical Wnt signaling pathway. More importantly, our findings demonstrated that the augmentation of miR-30a level in podocytes inhibits the nuclear translocation of NFATc3 to protect cytoskeleton disorder or rearrangement. In summary, we uncovered the protective function of miR30a targeting NFATc3 in the regulation of podocyte injury response to EMT.
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