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Li Y, Xu C, Zhao F, Liu Q, Qiu X, Li M, Yang Y, Yu S, Tong H, Zhang L, Chen B, Qu L, Yu Z. Podocyte-specific Nup160 knockout mice develop nephrotic syndrome and glomerulosclerosis. Hum Mol Genet 2024; 33:667-676. [PMID: 38224683 DOI: 10.1093/hmg/ddad211] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Revised: 12/15/2023] [Accepted: 12/18/2023] [Indexed: 01/17/2024] Open
Abstract
More than 60 monogenic genes mutated in steroid-resistant nephrotic syndrome (SRNS) have been identified. Our previous study found that mutations in nucleoporin 160 kD (NUP160) are implicated in SRNS. The NUP160 gene encodes a component of the nuclear pore complex. Recently, two siblings with homozygous NUP160 mutations presented with SRNS and a nervous system disorder. However, replication of nephrotic syndrome (NS)-associated phenotypes in a mammalian model following loss of Nup160 is needed to prove that NUP160 mutations cause SRNS. Here, we generated a podocyte-specific Nup160 knockout (Nup160podKO) mouse model using CRISPR/Cas9 and Cre/loxP technologies. We investigated NS-associated phenotypes in these Nup160podKO mice. We verified efficient abrogation of Nup160 in Nup160podKO mice at both the DNA and protein levels. We showed that Nup160podKO mice develop typical signs of NS. Nup160podKO mice exhibited progression of proteinuria to average albumin/creatinine ratio (ACR) levels of 15.06 ± 2.71 mg/mg at 26 weeks, and had lower serum albumin levels of 13.13 ± 1.34 g/l at 30 weeks. Littermate control mice had urinary ACR mean values of 0.03 mg/mg and serum albumin values of 22.89 ± 0.34 g/l at the corresponding ages. Further, Nup160podKO mice exhibited glomerulosclerosis compared with littermate control mice. Podocyte-specific Nup160 knockout in mice led to NS and glomerulosclerosis. Thus, our findings strongly support that mutations in NUP160 cause SRNS. The newly generated Nup160podKO mice are a reliable mammalian model for future study of the pathogenesis of NUP160-associated SRNS.
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Affiliation(s)
- Yuanyuan Li
- College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fujian Maternity and Child Health Hospital, 18 Daoshan Road, Fuzhou, Fujian 350000, China
- College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Department of Nephrology, Rheumatology and Immunology, Fujian Children's Hospital, 966 Heng Yu Road, Fuzhou, Fujian 350014, China
- Fujian Key Laboratory of Women and Children's Critical Diseases Research, 18 Daoshan Road, Fuzhou, Fujian 350000, China
| | - Chan Xu
- College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fujian Maternity and Child Health Hospital, 18 Daoshan Road, Fuzhou, Fujian 350000, China
- College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Department of Nephrology, Rheumatology and Immunology, Fujian Children's Hospital, 966 Heng Yu Road, Fuzhou, Fujian 350014, China
- Fujian Key Laboratory of Women and Children's Critical Diseases Research, 18 Daoshan Road, Fuzhou, Fujian 350000, China
- Department of Pediatrics, Fuzong Clinical Medical College, Fujian Medical University, 156 Xi Er Huan Bei Road, Fuzhou, Fujian 350025, China
| | - Feng Zhao
- College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Department of Nephrology, Rheumatology and Immunology, Fujian Children's Hospital, 966 Heng Yu Road, Fuzhou, Fujian 350014, China
| | - Qinghong Liu
- Department of Pathology, Fuzong Clinical Medical College, Fujian Medical University, 156 Xi Er Huan Bei Road, Fuzhou, Fujian 350025, China
| | - Xiaojian Qiu
- College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Department of Nephrology, Rheumatology and Immunology, Fujian Children's Hospital, 966 Heng Yu Road, Fuzhou, Fujian 350014, China
| | - Min Li
- Department of Pathology, Fuzong Clinical Medical College, Fujian Medical University, 156 Xi Er Huan Bei Road, Fuzhou, Fujian 350025, China
| | - Yonghui Yang
- College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Department of Nephrology, Rheumatology and Immunology, Fujian Children's Hospital, 966 Heng Yu Road, Fuzhou, Fujian 350014, China
| | - Shentong Yu
- Department of Pathology, Fuzong Clinical Medical College, Fujian Medical University, 156 Xi Er Huan Bei Road, Fuzhou, Fujian 350025, China
| | - Huajuan Tong
- College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Department of Nephrology, Rheumatology and Immunology, Fujian Children's Hospital, 966 Heng Yu Road, Fuzhou, Fujian 350014, China
| | - Lifang Zhang
- Department of Pathology, Fuzong Clinical Medical College, Fujian Medical University, 156 Xi Er Huan Bei Road, Fuzhou, Fujian 350025, China
| | - Bing Chen
- College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Department of Nephrology, Rheumatology and Immunology, Fujian Children's Hospital, 966 Heng Yu Road, Fuzhou, Fujian 350014, China
| | - Lijuan Qu
- Department of Pathology, Fuzong Clinical Medical College, Fujian Medical University, 156 Xi Er Huan Bei Road, Fuzhou, Fujian 350025, China
| | - Zihua Yu
- College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fujian Maternity and Child Health Hospital, 18 Daoshan Road, Fuzhou, Fujian 350000, China
- College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Department of Nephrology, Rheumatology and Immunology, Fujian Children's Hospital, 966 Heng Yu Road, Fuzhou, Fujian 350014, China
- Fujian Key Laboratory of Women and Children's Critical Diseases Research, 18 Daoshan Road, Fuzhou, Fujian 350000, China
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Alvi NH, Turkstani BA, Ashi AS, Alzahrani AM, Tawffeq AM. COQ8B-Related Steroid-Resistant Nephrotic Syndrome in Saudi Arabia: A Case Report. Cureus 2022; 14:e31922. [DOI: 10.7759/cureus.31922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/26/2022] [Indexed: 11/28/2022] Open
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3
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Liang R, Chen X, Zhang Y, Law CF, Yu S, Jiao J, Yang Q, Wu D, Zhang G, Chen H, Wang M, Yang H, Wang A. Clinical features and gene variation analysis of COQ8B nephropathy: Report of seven cases. Front Pediatr 2022; 10:1030191. [PMID: 36843884 PMCID: PMC9948246 DOI: 10.3389/fped.2022.1030191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/28/2022] [Accepted: 12/02/2022] [Indexed: 02/11/2023] Open
Abstract
OBJECTIVE COQ8B nephropathy is a relatively rare autosomal recessive kidney disease characterized by proteinuria and a progressive deterioration of renal function, eventually leading to end-stage renal disease (ESRD). The objective is to study the characteristics and correlation between the genotype and the clinical phenotype of COQ8B nephropathy. METHODS This is a retrospective study focusing on the clinical characteristics of seven COQ8B nephropathy patients diagnosed by gene sequencing. Basic clinical information, clinical manifestations, examinations, imaging, genomes, pathology, treatments, and prognosis of the patients were reviewed. RESULTS Of the seven patients, two were male children and five were female children. The median age at the disease onset was 5 years and 3 months. The initial main clinical manifestations were proteinuria and renal insufficiency. Four patients had severe proteinuria, four had focal segmental glomerulosclerosis (FSGS) diagnosed by a renal biopsy, and two had nephrocalcinosis after an ultrasound was performed on them. There were no other clinical manifestations such as neuropathy, muscle atrophy, and so on in all of them. Their gene mutations were all exon variants, which were classified as heterozygous or homozygous variants by performing family verification analysis. Compound heterozygous variants were predominant in all, and all gene variants were inherited from their parents. One novel mutation, c.1465c>t, was found in this study. This gene mutation resulted from changes in the amino acid sequence, thus leading to an abnormal protein structure. Two patients with early diagnosis of COQ8B nephropathy presented with no renal insufficiency and were treated with oral coenzyme Q10 (CoQ10), and they maintained normal renal function. For the remaining five who were treated with CoQ10 following renal insufficiency, the deterioration of renal function could not be reversed, and they progressed to ESRD within a short time (median time: 7 months). A follow-up of these patients showed normal renal function with a CoQ10 supplement. CONCLUSION For unexplained proteinuria, renal insufficiency, or steroid-resistant nephrotic syndrome, gene sequencing should be considered, in addition to renal biopsy, as early as possible. Timely diagnosis of COQ8B nephropathy and early supplementation of sufficient CoQ10 can help control the progression of the disease and significantly improve the prognosis.
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Affiliation(s)
- Rui Liang
- Department of Pediatrics, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - Xuelan Chen
- Department of Nephrology, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Ying Zhang
- Department of Pediatrics, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - Chak-Fun Law
- Center for Biomedicine and Innovations, Faculty of Medicine, Macau University Science and Technology, Taipa, China
| | - Sijie Yu
- Department of Nephrology, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Jia Jiao
- Department of Nephrology, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Qin Yang
- Department of Nephrology, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Daoqi Wu
- Department of Nephrology, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Gaofu Zhang
- Department of Nephrology, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Han Chen
- Department of Nephrology, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Mo Wang
- Department of Nephrology, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Haiping Yang
- Department of Nephrology, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Anshuo Wang
- Department of Nephrology, Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
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Schijvens AM, van de Kar NC, Bootsma-Robroeks CM, Cornelissen EA, van den Heuvel LP, Schreuder MF. Mitochondrial Disease and the Kidney With a Special Focus on CoQ 10 Deficiency. Kidney Int Rep 2020; 5:2146-2159. [PMID: 33305107 PMCID: PMC7710892 DOI: 10.1016/j.ekir.2020.09.044] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 09/29/2020] [Indexed: 12/13/2022] Open
Abstract
Mitochondrial cytopathies include a heterogeneous group of diseases that are characterized by impaired oxidative phosphorylation, leading to multi-organ involvement and progressive clinical deterioration. Most mitochondrial cytopathies that cause kidney symptoms are characterized by tubular defects, but glomerular, tubulointerstitial, and cystic diseases have also been described. Mitochondrial cytopathies can result from mitochondrial or nuclear DNA mutations. Early recognition of defects in the coenzyme Q10 (CoQ10) biosynthesis is important, as patients with primary CoQ10 deficiency may be responsive to treatment with oral CoQ10 supplementation, in contrast to most mitochondrial diseases. A literature search was conducted to investigate kidney involvement in genetic mitochondrial cytopathies and to identify mitochondrial and nuclear DNA mutations involved in mitochondrial kidney disease. Furthermore, we identified all reported cases to date with a CoQ10 deficiency with glomerular involvement, including 3 patients with variable renal phenotypes in our clinic. To date, 144 patients from 95 families with a primary CoQ10 deficiency and glomerular involvement have been described based on mutations in PDSS1, PDSS2, COQ2, COQ6, and COQ8B/ADCK4. This review provides an overview of kidney involvement in genetic mitochondrial cytopathies with a special focus on CoQ10 deficiency.
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Affiliation(s)
- Anne M. Schijvens
- Department of Pediatric Nephrology, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Amalia Children’s Hospital, Nijmegen, the Netherlands
| | - Nicole C. van de Kar
- Department of Pediatric Nephrology, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Amalia Children’s Hospital, Nijmegen, the Netherlands
| | - Charlotte M. Bootsma-Robroeks
- Department of Pediatric Nephrology, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Amalia Children’s Hospital, Nijmegen, the Netherlands
| | - Elisabeth A. Cornelissen
- Department of Pediatric Nephrology, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Amalia Children’s Hospital, Nijmegen, the Netherlands
| | - Lambertus P. van den Heuvel
- Department of Pediatric Nephrology, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Amalia Children’s Hospital, Nijmegen, the Netherlands
- Department of Development and Regeneration,University Hospital Leuven, Leuven, Belgium
| | - Michiel F. Schreuder
- Department of Pediatric Nephrology, Radboud University Medical Center, Radboud Institute for Molecular Life Sciences, Amalia Children’s Hospital, Nijmegen, the Netherlands
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Transcription factor Kruppel-like factor 5 positively regulates the expression of AarF domain containing kinase 4. Mol Biol Rep 2020; 47:8419-8427. [PMID: 33033902 DOI: 10.1007/s11033-020-05882-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Revised: 09/26/2020] [Accepted: 09/30/2020] [Indexed: 02/04/2023]
Abstract
AarF domain containing kinase 4 (ADCK4) is identified as a candidate gene associated with hereditary nephrotic syndrome (NS). Kruppel-like factor 5 (KLF5) is reported to promote podocyte survival by blocking the ERK/p38 MAPK pathways. Both ADCK4 and KLF5 are involved in the occurrence and development of podocyte disease, but their interaction remains unclear. Firstly, we found that the mRNA levels of ADCK4 and KLF5 decreased in NS patients, and both levels showed an obvious linear relationship. Secondly, we cloned the ADCK4 promoter region and examined its promoter activity in Hela, A549, and HEK 293 cell lines. Deletion analysis showed that the region - 116/- 4 relative to the transcriptional start site (TSS) was the core region of ADCK4 promoter. Thirdly, mutation analysis showed that putative binding sites for KLF5 contributed to the ADCK4 promoter activity. In HEK293 cells, we found that KLF5 upregulated the mRNA and protein levels of ADCK4. Finally, our chromatin immunoprecipitation assay found that KLF5 could bind to the specific region of ADCK4 promoter. These results showed that KLF5 can positively regulate the transcriptional activity of ADCK4.
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6
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Early-onset COQ8B (ADCK4) glomerulopathy in a child with isolated proteinuria: a case report and literature review. BMC Nephrol 2020; 21:406. [PMID: 32957916 PMCID: PMC7507654 DOI: 10.1186/s12882-020-02038-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2020] [Accepted: 08/23/2020] [Indexed: 02/06/2023] Open
Abstract
Background Herein, a 3-year-old boy presented with hidden-onset isolated proteinuria was reported. The disease was induced by COQ8B (previously termed ADCK4) compound heterozygous variants, including c.[271C > T] and c.[737G > A], which were inherited from his father and mother, respectively. Case presentation The patient visited our clinic due to non-nephrotic range proteinuria for 3 months, but no obvious abnormality was detected in the vital signs or laboratory test results. Renal histopathology revealed mitochondrial nephropathy, which manifested as mild glomerular abnormalities under light microscope, together with mitochondrial proliferation and hypertrophy and crowded arrangement under electron microscope. As suggested by whole exome sequencing, the patient inherited the COQ8B compound heterozygous variants from both of his parents who showed normal phenotype. After literature review, it was confirmed that one of the variant site (c.[271C > T]) had not been reported among the East Asian populations so far. Conclusions Steroid-resistant nephrotic syndrome and focal segmental glomerulosclerosis are the most common phenotypes and renal histopathological manifestations of COQ8B variant. Nonetheless, our case shows that such variant may have hidden and mild clinical manifestations at the early onset. Therefore, early diagnosis will help to identify children at the early disease stage who have opportunity to benefit from oral coenzyme Q10 supplementation.
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Park J, Liu CL, Kim J, Susztak K. Understanding the kidney one cell at a time. Kidney Int 2019; 96:862-870. [PMID: 31492507 PMCID: PMC6777841 DOI: 10.1016/j.kint.2019.03.035] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 03/19/2019] [Accepted: 03/22/2019] [Indexed: 01/19/2023]
Abstract
A revolution in cellular measurement technology is underway. Whereas prior studies have been able to analyze only the averaged outputs from renal tissue, we now can accurately monitor genome-wide gene expression, regulation, function, cellular history, and cellular interactions in thousands of individual cells in a single experiment. These methods are key drivers in changing our previous morphotype-based organ and disease descriptions to unbiased genomic definitions and therefore improving our understanding of kidney development, homeostasis, and disease.
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Affiliation(s)
- Jihwan Park
- Renal, Electrolyte, and Hypertension Division, Department of Medicine, Department of Genetics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Chang Linda Liu
- Renal, Electrolyte, and Hypertension Division, Department of Medicine, Department of Genetics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Junhyong Kim
- Department of Biology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Katalin Susztak
- Renal, Electrolyte, and Hypertension Division, Department of Medicine, Department of Genetics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
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Abstract
Podocytes cover the kidney glomerular basement membrane and present the final barrier in the renal filtration system. Podocyte loss, observed in most kidney diseases, correlates with kidney function decline. In this issue of Cell Chemical Biology, Seiber et al. (2018), using a high-throughput chemical screen, identified the compound CDG-0876, which improved podocyte survival.
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Affiliation(s)
- Joshua S Bryer
- Renal-Electrolyte and Hypertension Division of Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Katalin Susztak
- Renal-Electrolyte and Hypertension Division of Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA; Department of Genetics, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA.
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Akt2 causes TGFβ-induced deptor downregulation facilitating mTOR to drive podocyte hypertrophy and matrix protein expression. PLoS One 2018; 13:e0207285. [PMID: 30444896 PMCID: PMC6239304 DOI: 10.1371/journal.pone.0207285] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2018] [Accepted: 10/29/2018] [Indexed: 02/06/2023] Open
Abstract
TGFβ promotes podocyte hypertrophy and expression of matrix proteins in fibrotic kidney diseases such as diabetic nephropathy. Both mTORC1 and mTORC2 are hyperactive in response to TGFβ in various renal diseases. Deptor is a component of mTOR complexes and a constitutive inhibitor of their activities. We identified that deptor downregulation by TGFβ maintains hyperactive mTOR in podocytes. To unravel the mechanism, we found that TGFβ -initiated noncanonical signaling controls deptor inhibition. Pharmacological inhibitor of PI 3 kinase, Ly 294002 and pan Akt kinase inhibitor MK 2206 prevented the TGFβ induced downregulation of deptor, resulting in suppression of both mTORC1 and mTORC2 activities. However, specific isoform of Akt involved in this process is not known. We identified Akt2 as predominant isoform expressed in kidney cortex, glomeruli and podocytes. TGFβ time-dependently increased the activating phosphorylation of Akt2. Expression of dominant negative PI 3 kinase and its signaling inhibitor PTEN blocked Akt2 phosphorylation by TGFβ. Inhibition of Akt2 using a phospho-deficient mutant that inactivates its kinase activity, as well as siRNA against the kinase markedly diminished TGFβ -mediated deptor suppression, its association with mTOR and activation of mTORC1 and mTORC2. Importantly, inhibition of Akt2 blocked TGFβ -induced podocyte hypertrophy and expression of the matrix protein fibronectin. This inhibition was reversed by the downregulation of deptor. Interestingly, we detected increased phosphorylation of Akt2 concomitant with TGFβ expression in the kidneys of diabetic rats. Thus, our data identify previously unrecognized Akt2 kinase as a driver of TGFβ induced deptor downregulation and sustained mTORC1 and mTORC2 activation. Furthermore, we provide the first evidence that deptor downstream of Akt2 contributes to podocyte hypertrophy and matrix protein expression found in glomerulosclerosis in different renal diseases.
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Park J, Shrestha R, Qiu C, Kondo A, Huang S, Werth M, Li M, Barasch J, Suszták K. Single-cell transcriptomics of the mouse kidney reveals potential cellular targets of kidney disease. Science 2018; 360:758-763. [PMID: 29622724 DOI: 10.1126/science.aar2131] [Citation(s) in RCA: 676] [Impact Index Per Article: 112.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Accepted: 03/27/2018] [Indexed: 12/12/2022]
Abstract
Our understanding of kidney disease pathogenesis is limited by an incomplete molecular characterization of the cell types responsible for the organ's multiple homeostatic functions. To help fill this knowledge gap, we characterized 57,979 cells from healthy mouse kidneys by using unbiased single-cell RNA sequencing. On the basis of gene expression patterns, we infer that inherited kidney diseases that arise from distinct genetic mutations but share the same phenotypic manifestation originate from the same differentiated cell type. We also found that the collecting duct in kidneys of adult mice generates a spectrum of cell types through a newly identified transitional cell. Computational cell trajectory analysis and in vivo lineage tracing revealed that intercalated cells and principal cells undergo transitions mediated by the Notch signaling pathway. In mouse and human kidney disease, these transitions were shifted toward a principal cell fate and were associated with metabolic acidosis.
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Affiliation(s)
- Jihwan Park
- Renal Electrolyte and Hypertension Division, Department of Medicine and Genetics, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Rojesh Shrestha
- Renal Electrolyte and Hypertension Division, Department of Medicine and Genetics, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Chengxiang Qiu
- Renal Electrolyte and Hypertension Division, Department of Medicine and Genetics, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Ayano Kondo
- Renal Electrolyte and Hypertension Division, Department of Medicine and Genetics, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Shizheng Huang
- Renal Electrolyte and Hypertension Division, Department of Medicine and Genetics, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Max Werth
- Renal Division, Department of Medicine, Columbia University, New York, NY 10032, USA
| | - Mingyao Li
- Department of Biostatistics, Epidemiology and Informatics, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Jonathan Barasch
- Renal Division, Department of Medicine, Columbia University, New York, NY 10032, USA
| | - Katalin Suszták
- Renal Electrolyte and Hypertension Division, Department of Medicine and Genetics, University of Pennsylvania, Philadelphia, PA 19104, USA.
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11
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Nawata A, Hisano S, Shimajiri S, Wang KY, Tanaka Y, Nakayama T. Podocyte and endothelial cell injury lead to nephrotic syndrome in proliferative lupus nephritis. Histopathology 2018; 72:1084-1092. [PMID: 29247494 DOI: 10.1111/his.13454] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Accepted: 12/10/2017] [Indexed: 01/12/2023]
Abstract
AIMS Nephrotic syndrome (NS) is a major manifestation of lupus nephritis (LN). The dysregulation of podocytes, the glomerular basement membrane (GBM) and endothelial cells (ECs) results in proteinuria in glomerular diseases. The aim of our study was to clarify whether the dysregulation of these barriers is associated with NS in proliferative LN and membranous LN. METHODS AND RESULTS Fifty-six patients with NS, including minimal change NS in 15, primary membranous nephropathy (PMN) in 13, class III/IV LN in 15, and class V LN in 13, were enrolled in this study. Subjects with idiopathic haematuria were assigned as controls. Glomerular expression of Wilms tumour protein 1 (WT1), nephrin, synaptopodin and podocalyxin was evaluated by immunohistochemistry (IHC) and real-time quantitative reverse transcription polymerase chain reaction. EC injury was evaluated by CD31 immunostaining and electron microscopy (EM). Reduced expression of WT1, nephrin and synaptopodin was found in PMN, class III/IV LN and class V LN as compared with controls by IHC and mRNA analysis. Reduced expression of these molecules was not different between class III/IV LN and class V LN. Reduced numbers of CD31-positive ECs were found in class III/IV LN as compared with class V LN. EC injury showing subendothelial widening on EM was apparent in class III/IV LN as compared with class V LN. Foot process effacement was found only along the GBM showing EC injury in class III/IV LN. CONCLUSIONS Our study suggests that coexistence of podocyte and EC injury may lead to NS in proliferative LN. Podocyte damage alone leads to NS in membranous LN.
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Affiliation(s)
- Aya Nawata
- Department of Pathology, University of Occupational and Environmental Health, Kitakyushu, Japan.,The First Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Satoshi Hisano
- Department of Pathology, Faculty of Medicine, Fukuoka University, Fukuoka, Japan
| | - Shohei Shimajiri
- Department of Pathology, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Ke-Yong Wang
- Department of Pathology, University of Occupational and Environmental Health, Kitakyushu, Japan.,Shared-Use Research Centre, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Yoshiya Tanaka
- The First Department of Internal Medicine, University of Occupational and Environmental Health, Kitakyushu, Japan
| | - Toshiyuki Nakayama
- Department of Pathology, University of Occupational and Environmental Health, Kitakyushu, Japan
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Yang Y, Zhao L, Xiao L, Liang Y, Wang C, Fu X, Zhu X, Yuan S, Zhu J, Zhu X, Liu Y, Li J, Luo J, Liu F, Sun L. Chlormethine Hydrochloride is Not Inferior to Tacrolimus in Treating Steroid-Resistant Nephrotic Syndrome. Kidney Blood Press Res 2018; 43:68-79. [DOI: 10.1159/000486911] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2017] [Accepted: 01/18/2018] [Indexed: 11/19/2022] Open
Abstract
<b><i>Background/Aims:</i></b> The present study aimed to explore the equivalence of CHL and tacrolimus (TAC), despite reports regarding the efficacy and safety of TAC in treating SRNS patients. <b><i>Methods:</i></b> A retrospective cohort study of CHL or TAC treatment was performed by collecting the medical records of SRNS patients with a pathological classification of focal segmental glomurular sclerosis (FSGS) or membranous nephropathy (MN) from December 2008 to December 2014 in a 3A grade hospital in southern China. The treatment regimen includes 6 months of induction therapy and a subsequent 6 to 30 months of maintenance therapy, which were evaluated by the scheduled follow-up and the detection of proteinuria and serum creatinine levels. The treatment outcomes were classified as complete remission, partial remission or no remission. <b><i>Results:</i></b> In a total of 146 SRNS patients, CHL treatment showed a higher proportion of complete remission (27.8% vs 14.9%) or partial remission (52.8% vs 37.8%) compared to TAC treatment (<i>P</i> < 0.10) at the stage of induction therapy. The CHL treatment of SRNS patients with FSGS showed better efficacy than treatment of the TAC group, but the difference of efficacy in the pathological type of MN between CHL and TAC group was not significant (<i>P</i> > 0.10). During maintenance therapy, the difference between the CHL and TAC groups was not significant in the SRNS patients with FSGS or MN (<i>P</i> > 0.10). In addition, the difference of adverse effects between CHL and TAC group was not significant (<i>P</i> > 0.10), although there was a slightly higher proportion of nausea and vomiting in the CHL group. <b><i>Conclusion:</i></b> The non-inferior efficacy of CHL treatment on the SRNS patients with FSGS or MN compared to TAC treatment, which highlighted CHL can be considered to be alternative treatment for SRNS patients in the clinical setting.
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Feng C, Wang Q, Wang J, Liu F, Shen H, Fu H, Mao J. Coenzyme Q10 supplementation therapy for 2 children with proteinuria renal disease and ADCK4 mutation: Case reports and literature review. Medicine (Baltimore) 2017; 96:e8880. [PMID: 29382012 PMCID: PMC5709011 DOI: 10.1097/md.0000000000008880] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
Abstract
RATIONALE Mitochondrial nephropathy has a poor prognosis and often progresses to the end-stage renal disease. Renal pathology often is focal segmental glomerulosclerosis (FSGS) and does not respond to steroid therapy or immunosuppressive therapy. Some patients are benefited from the therapy of coenzyme Q10, which affect the synthesis pathway of coenzyme Q10. PATIENT CONCERNS Herein, we report 2 cases of children with proteinuria renal disease with ADCK4 mutation. DIAGNOSES Proteinuria renal disease with ADCK4 mutation. INTERVENTIONS Compound heterozygous mutation in ADCK4 gene were detected with next-generation sequencing and confirmed by Sanger sequencing. Both of the patients were given coenzyme Q10 supplementation therapy. OUTCOMES The first patient showed a decreased proteinuria after coenzyme Q10 supplementation therapy, while the other was not improved. LESSONS Based on the cases we reported and from the literature, recognition of ADCK4 mutation through early and accurate genetic screening could be helpful in avoiding unnecessary toxicities and in preventing complications arising in mitochondrial nephropathy.
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Affiliation(s)
- Chunyue Feng
- Department of Nephrology, The Children Hospital of Zhejiang University School of Medicine, Hangzhou
| | - Qiong Wang
- Department of Nephrology, The Children Hospital of Zhejiang University School of Medicine, Hangzhou
- Department of Nephrology, The Second Hospital of Jiaxing Municipal, Jiaxing, Zhejiang Province, China
| | - Jingjing Wang
- Department of Nephrology, The Children Hospital of Zhejiang University School of Medicine, Hangzhou
| | - Fei Liu
- Department of Nephrology, The Children Hospital of Zhejiang University School of Medicine, Hangzhou
| | - Huijun Shen
- Department of Nephrology, The Children Hospital of Zhejiang University School of Medicine, Hangzhou
| | - Haidong Fu
- Department of Nephrology, The Children Hospital of Zhejiang University School of Medicine, Hangzhou
| | - Jianhua Mao
- Department of Nephrology, The Children Hospital of Zhejiang University School of Medicine, Hangzhou
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Zhang H, Wang F, Liu X, Zhong X, Yao Y, Xiao H. Steroid-resistant nephrotic syndrome caused by co-inheritance of mutations at NPHS1 and ADCK4 genes in two Chinese siblings. Intractable Rare Dis Res 2017; 6:299-303. [PMID: 29259860 PMCID: PMC5735285 DOI: 10.5582/irdr.2017.01037] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Hereditary nephrotic syndrome often presents with steroid-resistance and onset within the first year of life. Mutations in genes highly expressed in podocytes have been found in two thirds of these patients, especially NPHS1 and NPHS2 among at least 29 genetic causes that have been discovered. We reported two siblings with steroid-resistant nephrotic syndrome caused by co-inheritance of mutations at NPHS1 (c.1339G>A, p.E447K) and ACDK4 (c.748G>C, p.D250H) genes. The siblings presented with steroid-resistant nephrotic syndrome and pathological lesions of focal segmental glomerulosclerosis (FSGS), while the elder sister also developed hypertension, renal failure and cardiac dysfunction.
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Affiliation(s)
- Hongwen Zhang
- Department of Pediatric, Peking University First Hospital, Beijing, China
| | - Fang Wang
- Department of Pediatric, Peking University First Hospital, Beijing, China
| | - Xiaoyu Liu
- Department of Pediatric, Peking University First Hospital, Beijing, China
| | - Xuhui Zhong
- Department of Pediatric, Peking University First Hospital, Beijing, China
| | - Yong Yao
- Department of Pediatric, Peking University First Hospital, Beijing, China
| | - Huijie Xiao
- Department of Pediatric, Peking University First Hospital, Beijing, China
- Address correspondence to: Dr. Huijie Xiao, Department of Pediatric, Peking University First Hospital, No.1 Xi An Men Da Jie, Beijing 100034, China. E-mail:
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Lolin K, Chiodini BD, Hennaut E, Adams B, Dahan K, Ismaili K. Early-onset of ADCK4 glomerulopathy with renal failure: a case report. BMC MEDICAL GENETICS 2017; 18:28. [PMID: 28298181 PMCID: PMC5353777 DOI: 10.1186/s12881-017-0392-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Accepted: 03/07/2017] [Indexed: 12/31/2022]
Abstract
BACKGROUND We present a rare early presentation of a ADCK4-related glomerulopathy. This case is of interest as potentially treatable if genetic results are timely obtained. CASE PRESENTATION We report the case of a 5-year-old boy who was identified with significant proteinuria by a urinary routine screening program for school children. Physical examination revealed dysplastic ears and abnormal folded pinna. Albumin level was 41 g/L (39-53 g/L), and urine proteins/creatinine ratio was 2.6 g/g. Renal ultrasound showed enlarged kidneys and perimedullary hyperechogenicity. Treatment by angiotensin-converting-enzyme inhibitor was not beneficial. Renal biopsy showed signs of focal segmental glomerulosclerosis. After 4 years of follow-up, he developed a clinical nephrotic syndrome and no response to prednisone and other immunosuppressive agents was obtained. Within 6 months, he was in end-stage-renal-failure (ESRF) and hemodialysis was started. He was transplanted at 10 years with his mother's kidney. Genes known to be responsible in steroid-resistant nephrotic syndromes were tested. Our patient is compound heterozygous for two mutations in the aarF domain-containing-kinase 4 (ADCK4) gene. ADCK4 gene is one of the genes involved in coenzyme Q10 (CoQ10) biosynthesis, is located in chromosome 19q13.2 and expressed in podocytes. ADCK4 mutations show a largely renal-limited phenotype. The nephropathy usually presents during adolescence, fast evolves towards ESRF, and may be treatable by CoQ10 supplementation if started early in the disease. Our patient presented nephrotic range proteinuria at 5 years, and he reached ESRF at 10 years. CONCLUSION ADCK4-related glomerulopathy is an important novel and potentially treatable cause of isolated nephropathy not only in adolescents, but also in children in their first decade of life. Discovery of important proteinuria in an asymptomatic child should prompt early genetic investigations.
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Affiliation(s)
- Ksenija Lolin
- Department of Pediatric Nephrology, Hôpital Universitaire des Enfants-Reine Fabiola, Université Libre de Bruxelles (ULB), Avenue JJ Crocq 15, 1020, Brussels, Belgium
| | - Benedetta D Chiodini
- Department of Pediatric Nephrology, Hôpital Universitaire des Enfants-Reine Fabiola, Université Libre de Bruxelles (ULB), Avenue JJ Crocq 15, 1020, Brussels, Belgium.
| | - Elise Hennaut
- Department of Pediatric Nephrology, Hôpital Universitaire des Enfants-Reine Fabiola, Université Libre de Bruxelles (ULB), Avenue JJ Crocq 15, 1020, Brussels, Belgium
| | - Brigitte Adams
- Department of Pediatric Nephrology, Hôpital Universitaire des Enfants-Reine Fabiola, Université Libre de Bruxelles (ULB), Avenue JJ Crocq 15, 1020, Brussels, Belgium
| | - Karin Dahan
- Center for Human Genetics, Institut de Pathologie de Gosselies (IPG), Gosselies, Belgium
| | - Khalid Ismaili
- Department of Pediatric Nephrology, Hôpital Universitaire des Enfants-Reine Fabiola, Université Libre de Bruxelles (ULB), Avenue JJ Crocq 15, 1020, Brussels, Belgium
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16
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Li SY, Susztak K. The long noncoding RNA Tug1 connects metabolic changes with kidney disease in podocytes. J Clin Invest 2016; 126:4072-4075. [PMID: 27760046 DOI: 10.1172/jci90828] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
An increasing amount of evidence suggests that metabolic alterations play a key role in chronic kidney disease (CKD) pathogenesis. In this issue of the JCI, Long et al. report that the long noncoding RNA (lncRNA) taurine-upregulated 1 (Tug1) contributes to CKD development. The authors show that Tug1 regulates mitochondrial function in podocytes by epigenetic targeting of expression of the transcription factor PPARγ coactivator 1α (PGC-1α, encoded by Ppargc1a). Transgenic overexpression of Tug1 specifically in podocytes ameliorated diabetes-induced CKD in mice. Together, these results highlight an important connection between lncRNA-mediated metabolic alterations in podocytes and kidney disease development.
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Abstract
Chronic kidney disease (CKD) represents a leading cause of death in the United States. There is no cure for this disease, with current treatment strategies relying on blood pressure control through blockade of the renin-angiotensin system. Such approaches only delay the development of end-stage kidney disease and can be associated with serious side effects. Recent identification of several novel mechanisms contributing to CKD development - including vascular changes, loss of podocytes and renal epithelial cells, matrix deposition, inflammation and metabolic dysregulation - has revealed new potential therapeutic approaches for CKD. This Review assesses emerging strategies and agents for CKD treatment, highlighting the associated challenges in their clinical development.
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Abstract
Diabetes is increasing in prevalence and is the leading cause of end-stage renal disease in the United States. Diabetic kidney disease is considered a proteinuric glomerular disease. Although the glomerulus is composed of various cell types, research suggests that podocytes are critical to overall glomerular health. Podocyte injury has been identified as a pivotal event resulting in proteinuric kidney disease, glomerulosclerosis, and loss of renal function. Thus, understanding the signaling mechanisms that trigger podocyte injury in diabetic kidney disease might allow for the development of targeted therapeutics to prevent or ameliorate progression to end-stage renal failure. This review focuses on the role of podocytes in diabetic kidney disease.
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Affiliation(s)
- Jamie S Lin
- Renal-Electrolyte and Hypertension Division, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA
| | - Katalin Susztak
- Renal-Electrolyte and Hypertension Division, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, 19104, USA.
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Suzuki T, Yamaguchi H, Kikusato M, Hashizume O, Nagatoishi S, Matsuo A, Sato T, Kudo T, Matsuhashi T, Murayama K, Ohba Y, Watanabe S, Kanno SI, Minaki D, Saigusa D, Shinbo H, Mori N, Yuri A, Yokoro M, Mishima E, Shima H, Akiyama Y, Takeuchi Y, Kikuchi K, Toyohara T, Suzuki C, Ichimura T, Anzai JI, Kohzuki M, Mano N, Kure S, Yanagisawa T, Tomioka Y, Toyomizu M, Tsumoto K, Nakada K, Bonventre JV, Ito S, Osaka H, Hayashi KI, Abe T. Mitochonic Acid 5 Binds Mitochondria and Ameliorates Renal Tubular and Cardiac Myocyte Damage. J Am Soc Nephrol 2015; 27:1925-32. [PMID: 26609120 DOI: 10.1681/asn.2015060623] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2015] [Accepted: 09/24/2015] [Indexed: 01/03/2023] Open
Abstract
Mitochondrial dysfunction causes increased oxidative stress and depletion of ATP, which are involved in the etiology of a variety of renal diseases, such as CKD, AKI, and steroid-resistant nephrotic syndrome. Antioxidant therapies are being investigated, but clinical outcomes have yet to be determined. Recently, we reported that a newly synthesized indole derivative, mitochonic acid 5 (MA-5), increases cellular ATP level and survival of fibroblasts from patients with mitochondrial disease. MA-5 modulates mitochondrial ATP synthesis independently of oxidative phosphorylation and the electron transport chain. Here, we further investigated the mechanism of action for MA-5. Administration of MA-5 to an ischemia-reperfusion injury model and a cisplatin-induced nephropathy model improved renal function. In in vitro bioenergetic studies, MA-5 facilitated ATP production and reduced the level of mitochondrial reactive oxygen species (ROS) without affecting activity of mitochondrial complexes I-IV. Additional assays revealed that MA-5 targets the mitochondrial protein mitofilin at the crista junction of the inner membrane. In Hep3B cells, overexpression of mitofilin increased the basal ATP level, and treatment with MA-5 amplified this effect. In a unique mitochondrial disease model (Mitomice with mitochondrial DNA deletion that mimics typical human mitochondrial disease phenotype), MA-5 improved the reduced cardiac and renal mitochondrial respiration and seemed to prolong survival, although statistical analysis of survival times could not be conducted. These results suggest that MA-5 functions in a manner differing from that of antioxidant therapy and could be a novel therapeutic drug for the treatment of cardiac and renal diseases associated with mitochondrial dysfunction.
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Affiliation(s)
- Takehiro Suzuki
- Divisions of Nephrology, Endocrinology, and Vascular Medicine and Renal Division, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts
| | - Hiroaki Yamaguchi
- Department of Pharmaceutical Sciences, Tohoku University Hospital, Sendai, Japan
| | - Motoi Kikusato
- Animal Nutrition, Life Sciences, Graduate School of Agricultural Science
| | - Osamu Hashizume
- Faculty of Life and Environmental Sciences, University of Tsukuba, Ibaraki, Japan
| | | | - Akihiro Matsuo
- Divisions of Nephrology, Endocrinology, and Vascular Medicine and
| | | | - Tai Kudo
- Primetech Co. Ltd., Tokyo, Japan
| | | | | | - Yuki Ohba
- Divisions of Nephrology, Endocrinology, and Vascular Medicine and
| | - Shun Watanabe
- Divisions of Nephrology, Endocrinology, and Vascular Medicine and
| | - Shin-Ichiro Kanno
- Division of Dynamic Proteome in Cancer and Aging, Institute of Development, Aging and Cancer
| | | | - Daisuke Saigusa
- Department of Integrative Genomics, Tohoku Medical Megabank Organization, Tohoku University, Sendai, Japan
| | | | | | - Akinori Yuri
- Laboratory of Oncology, Pharmacy Practice and Sciences, Tohoku University Graduate School of Pharmaceutical Sciences, Sendai, Japan
| | - Miyuki Yokoro
- Department of Food Sciences and Nutrition, School of Human Environmental Sciences, Mukogawa Women's University, Nishinomiya, Japan
| | - Eikan Mishima
- Divisions of Nephrology, Endocrinology, and Vascular Medicine and
| | - Hisato Shima
- Divisions of Nephrology, Endocrinology, and Vascular Medicine and
| | | | - Yoichi Takeuchi
- Divisions of Nephrology, Endocrinology, and Vascular Medicine and
| | - Koichi Kikuchi
- Divisions of Nephrology, Endocrinology, and Vascular Medicine and Clinical Biology and Hormonal Regulation, Tohoku University Graduate School of Medicine, Sendai, Japan
| | | | - Chitose Suzuki
- Divisions of Nephrology, Endocrinology, and Vascular Medicine and
| | - Takaharu Ichimura
- Renal Division, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts
| | | | | | - Nariyasu Mano
- Department of Pharmaceutical Sciences, Tohoku University Hospital, Sendai, Japan
| | | | | | - Yoshihisa Tomioka
- Laboratory of Oncology, Pharmacy Practice and Sciences, Tohoku University Graduate School of Pharmaceutical Sciences, Sendai, Japan
| | - Masaaki Toyomizu
- Animal Nutrition, Life Sciences, Graduate School of Agricultural Science
| | - Kohei Tsumoto
- Department of Bioengineering, University of Tokyo, Tokyo, Japan
| | - Kazuto Nakada
- Faculty of Life and Environmental Sciences, University of Tsukuba, Ibaraki, Japan
| | - Joseph V Bonventre
- Renal Division, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts
| | - Sadayoshi Ito
- Divisions of Nephrology, Endocrinology, and Vascular Medicine and
| | - Hitoshi Osaka
- Division of Pediatrics, Jichi Medical University, Tochigi, Japan; and
| | - Ken-Ichi Hayashi
- Department of Biochemistry, Okayama University of Science, Okayama, Japan
| | - Takaaki Abe
- Divisions of Nephrology, Endocrinology, and Vascular Medicine and Clinical Biology and Hormonal Regulation, Tohoku University Graduate School of Medicine, Sendai, Japan; Department of Medical Science, Tohoku University Graduate School of Biomedical Engineering, Sendai, Japan;
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Wang Z, Bao H, Ge Y, Zhuang S, Peng A, Gong R. Pharmacological targeting of GSK3β confers protection against podocytopathy and proteinuria by desensitizing mitochondrial permeability transition. Br J Pharmacol 2014; 172:895-909. [PMID: 25262943 DOI: 10.1111/bph.12952] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Revised: 08/27/2014] [Accepted: 09/22/2014] [Indexed: 01/12/2023] Open
Abstract
BACKGROUND AND PURPOSE Mitochondrial dysfunction, triggered by mitochondria permeability transition (MPT), has been centrally implicated in the pathogenesis of podocytopathy and involves a multitude of cell signalling mechanisms, among which, glycogen synthase kinase (GSK) 3β has emerged as the integration point and plays a crucial role. This study aimed to examine the role of GSK3β in podocyte MPT and mitochondrial dysfunction. EXPERIMENTAL APPROACH The regulatory effect of GSK3β on MPT was examined in differentiated podocytes in culture and in a murine model of adriamycin-induced podocytopathy using 4-benzyl-2-methyl-1,2,4-thiadiazolidine-3,5-dione (TDZD-8), a highly selective small-molecule inhibitor of GSK3β. KEY RESULTS TDZD-8 therapy prominently ameliorated the proteinuria and glomerular sclerosis in mice with adriamycin nephropathy; this was associated with a correction of GSK3β overactivity in the glomerulus and attenuation of podocyte injuries, including foot process effacement and podocyte death. Consistently, in adriamycin-injured podocytes, TDZD-8 treatment counteracted GSK3β overactivity, improved cell viability and prevented death, concomitant with diminished oxidative stress, improved mitochondrial dysfunction and desensitized MPT. Mechanistically, a discrete pool of GSK3β was found in podocyte mitochondria, which interacted with and phosphorylated clyclophilin F, a key structural component of the MPT pore. TDZD-8 treatment prevented the GSK3β-controlled phosphorylation and activation of cyclophilin F, desensitized MPT and alleviated the damage to mitochondria in podocytes induced by adriamycin in vivo and in vitro. CONCLUSIONS AND IMPLICATIONS Our findings suggest that pharmacological targeting of GSK3β could represent a promising and feasible therapeutic strategy for protecting podocytes against mitochondrial dysfunction induced by oxidative injuries.
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Affiliation(s)
- Zhen Wang
- Department of Nephrology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China; Division of Kidney Disease and Hypertension, Department of Medicine, Rhode Island Hospital, Brown University School of Medicine, Providence, RI, USA
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