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Chen Z, Liang W, Hu J, Zhu Z, Feng J, Ma Y, Yang Q, Ding G. Sirt6 deficiency contributes to mitochondrial fission and oxidative damage in podocytes via
ROCK1‐Drp1
signalling pathway. Cell Prolif 2022; 55:e13296. [PMID: 35842903 PMCID: PMC9528772 DOI: 10.1111/cpr.13296] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 05/25/2022] [Accepted: 05/30/2022] [Indexed: 11/30/2022] Open
Abstract
Objectives Materials and Methods Results Conclusion
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Affiliation(s)
- Zhaowei Chen
- Division of Nephrology Renmin Hospital of Wuhan University Wuhan Hubei China
- Nephrology and Urology Research Institute of Wuhan University Wuhan Hubei China
| | - Wei Liang
- Division of Nephrology Renmin Hospital of Wuhan University Wuhan Hubei China
- Nephrology and Urology Research Institute of Wuhan University Wuhan Hubei China
| | - Jijia Hu
- Division of Nephrology Renmin Hospital of Wuhan University Wuhan Hubei China
- Nephrology and Urology Research Institute of Wuhan University Wuhan Hubei China
| | - Zijing Zhu
- Division of Nephrology Renmin Hospital of Wuhan University Wuhan Hubei China
- Nephrology and Urology Research Institute of Wuhan University Wuhan Hubei China
| | - Jun Feng
- Division of Nephrology Renmin Hospital of Wuhan University Wuhan Hubei China
- Nephrology and Urology Research Institute of Wuhan University Wuhan Hubei China
| | - Yiqiong Ma
- Division of Nephrology Renmin Hospital of Wuhan University Wuhan Hubei China
- Nephrology and Urology Research Institute of Wuhan University Wuhan Hubei China
| | - Qian Yang
- Division of Nephrology Renmin Hospital of Wuhan University Wuhan Hubei China
- Nephrology and Urology Research Institute of Wuhan University Wuhan Hubei China
| | - Guohua Ding
- Division of Nephrology Renmin Hospital of Wuhan University Wuhan Hubei China
- Nephrology and Urology Research Institute of Wuhan University Wuhan Hubei China
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Zhou X, Cheng J, Chen Z, Li H, Chen S, Xu F, Fan R, Zhuang J, Sun T. Role of c-Abl in Ang II-induced aortic dissection formation: Potential regulatory efficacy on phenotypic transformation and apoptosis of VSMCs. Life Sci 2020; 256:117882. [PMID: 32497633 DOI: 10.1016/j.lfs.2020.117882] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 05/15/2020] [Accepted: 05/27/2020] [Indexed: 12/29/2022]
Abstract
AIMS Angiotensin II (Ang II) induces aortic dissection (AD) via regulation of pathological changes in vascular smooth muscle cells (VSMCs). However, the molecular mechanisms involved are not fully understood. The aim of this study was to evaluate the potential role of the proto-oncogene non-receptor cellular Abelson tyrosine kinase (c-Abl) in Ang II-induced VSMC phenotypic transformation and apoptosis. MAIN METHODS Lentiviral transfection and short hairpin RNA (shRNA) were used to enhance or inhibit c-Abl in cultured VSMCs. In addition, C57BL/6 and Abl1 gene knockout heterozygous (c-Abl-/+) mice were infused with Ang II, with or without c-Abl inhibitor (STI571) treatment. The incidence of AD was evaluated in vivo, while the molecular and pathological features of VSMC phenotypic transformation and apoptosis were evaluated in vitro and in vivo. KEY FINDINGS Ang II infusion induced a substantial incidence of AD in vivo (27%; 8/30), while STI571 intragastric gavage or Abl1 knockout reduced the incidence of AD to 13% (4/30) and 7% (2/30), respectively. The results of subsequent studies showed that c-Abl overexpression enhanced the Ang II-induced apoptosis and synthetic phenotypic transformation of VSMCs in vitro, while inhibition of c-Abl activity with STI571 or Abl1 gene knockout significantly attenuated the Ang II-induced apoptosis and synthetic phenotypic transformation of VSMCs both in vivo and in vitro. SIGNIFICANCE Activation of c-Abl may be important for the phenotypic transformation and apoptosis of VSMCs underlying the Ang II-induced AD. Targeted inhibition of c-Abl may prevent Ang II-induced AD via attenuation of the pathological changes of VSMCs.
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Affiliation(s)
- Xianwu Zhou
- Department of Cardiovascular Surgery, Guangdong Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangdong Provincial Key Laboratory of South China Structural Heart Disease, Guangdong Provincial People's Hospital, Guangzhou 510100, PR China
| | - Jiancheng Cheng
- Cardiothoracic Surgery Department of Zhengzhou central hospital affiliated to Zhengzhou University, Zhengzhou, China
| | - Zerui Chen
- Department of Cardiovascular Surgery, Guangdong Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangdong Provincial Key Laboratory of South China Structural Heart Disease, Guangdong Provincial People's Hospital, Guangzhou 510100, PR China
| | - Huadong Li
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Shu Chen
- Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Fei Xu
- Department of Gastroenterology, Zhongnan Hospital of Wuhan University, Wuhan 430030, China
| | - Ruixin Fan
- Department of Cardiovascular Surgery, Guangdong Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangdong Provincial Key Laboratory of South China Structural Heart Disease, Guangdong Provincial People's Hospital, Guangzhou 510100, PR China
| | - Jian Zhuang
- Department of Cardiovascular Surgery, Guangdong Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangdong Provincial Key Laboratory of South China Structural Heart Disease, Guangdong Provincial People's Hospital, Guangzhou 510100, PR China.
| | - Tucheng Sun
- Department of Cardiovascular Surgery, Guangdong Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangdong Provincial Key Laboratory of South China Structural Heart Disease, Guangdong Provincial People's Hospital, Guangzhou 510100, PR China.
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Wen Y, Chen J, Liu L, Guo G, Zeng Y, Zhang Y, Zeng Z, Wang Z, Peng X, Liang J. Cabin1 involves in renal tubular epithelial cells mitochondrial dysfunction through SIRT1/p53 pathway. J Recept Signal Transduct Res 2020; 40:141-147. [PMID: 32000560 DOI: 10.1080/10799893.2020.1719518] [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
Background: Angiotensin II (AngII) induced Calcineurin binding protein 1 (Cabin1) protein expression significantly increased during Renal tubular epithelial cells (RTEC) injury. However, the detailed function of Cabin1 protein in RTEC was not characterized well. In this study, we aimed to explore the downstream target of Cabin1 in vitro model.Methods: Rat kidney epithelial cells were cultured and stimulated with AngII. Electron microscopy was performed to observe mitochondrial morphology change. Immunofluorescence staining was detected to observe the distribution of cytoskeleton and Cabin1. Mitochondrial morphology change and protein expression were detected by electrical microscopy and western blot.Results: AngII induced the disruption of cytoskeleton at 24 and 48 h. Western blot analysis showed AngII significantly induced the overexpression of Cabin1. AngII induced a great deal of small, long and irregular mitochondria in RTEC, aspect ratio which reflects the length-to-width ratio of mitochondria remarkably increased at 12 and 24 h. Knocking down Cabin1 aggravated mitochondrial morphological abnormality in AngII treated RTEC. In comparison with control, Cabin1, p53 and cyto C level were significantly increased in AngII treated cells, while SIRT1 level was obviously decreased. Knocked down Cabin1 plus AngII stimulated, SIRT1 was further decreased, while p53 and cyto C were significantly increased.Conclusions: Cabin1 involves in RTEC mitochondrial dysfunction through SIRT1/p53 pathway. Cabin1 may be used as a new marker for the mechanisms of RTEC injury.
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Affiliation(s)
- Yueqiang Wen
- Department of Nephrology, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Jieru Chen
- Department of Intensive Care Unit, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Lingling Liu
- Department of General Medicine, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Guanhua Guo
- Department of Nephrology, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Yinsi Zeng
- Department of Nephrology, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Yujing Zhang
- Department of Nephrology, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Zhili Zeng
- Department of Nephrology, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Zebin Wang
- Department of Nephrology, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Xuan Peng
- Department of Intensive Care Unit, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
| | - Jianbo Liang
- Department of Nephrology, The Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China
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4
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Ma Y, Yang Q, Zhong Z, Liang W, Zhang L, Yang Y, Ding G. Role of c-Abl and nephrin in podocyte cytoskeletal remodeling induced by angiotensin II. Cell Death Dis 2018; 9:185. [PMID: 29416010 PMCID: PMC5833834 DOI: 10.1038/s41419-017-0225-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Revised: 12/05/2017] [Accepted: 12/06/2017] [Indexed: 12/18/2022]
Abstract
Our previous study showed that angiotensin II (Ang II) exposure diminished the interaction between nephrin and c-Abl, then c-Abl mediated SHIP2-Akt pathway in the process of podocyte injury in vivo and vitro. However, the relationship between nephrin and c-Abl was unknown. Recently, various studies showed that nephrin was required for cytoskeletal remodeling in glomerular podocytes. But its specific mechanisms remain incompletely understood. As a nonreceptor tyrosine kinase involved in cytoskeletal regulation, c-Abl may be a candidate of signaling proteins interacting with Src homology 2/3 (SH2/SH3) domains of nephrin. Therefore, it is proposed that c-Abl contributes to nephrin-dependent cytoskeletal remodeling of podocytes. Herein, we observed that nephrin-c-Abl colocalization were suppressed in glomeruli of patients with proteinuria. Next, CD16/7-nephrin and c-Abl vectors were constructed to investigate the nephrin-c-Abl signaling pathway in podocyte actin-cytoskeletal remodeling. The disorganized cytoskeleton stimulated by cytochalasin D in COS7 cells was dramatically restored by co-transfection with phosphorylated CD16/7-nephrin and c-Abl full-length constructs. Further, co-immunoprecipitation showed that phosphorylated CD16/7-nephrin interacted with wild-type c-Abl, but not with SH2/SH3-defective c-Abl. These findings suggest that phosphorylated nephrin is able to recruit c-Abl in a SH2/SH3-dependent manner and detached c-Abl from dephosphorylated nephrin contributes to cytoskeletal remodeling in podocytes.
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Affiliation(s)
- Yiqiong Ma
- Division of Nephrology, Renmin Hospital of Wuhan University, Wuhan, 430060, China
| | - Qian Yang
- Division of Nephrology, Renmin Hospital of Wuhan University, Wuhan, 430060, China
| | - Zhentong Zhong
- Division of Nephrology, Renmin Hospital of Wuhan University, Wuhan, 430060, China
| | - Wei Liang
- Division of Nephrology, Renmin Hospital of Wuhan University, Wuhan, 430060, China
| | - Lu Zhang
- Division of Nephrology, Renmin Hospital of Wuhan University, Wuhan, 430060, China
| | - Yingjie Yang
- Division of Nephrology, Renmin Hospital of Wuhan University, Wuhan, 430060, China
| | - Guohua Ding
- Division of Nephrology, Renmin Hospital of Wuhan University, Wuhan, 430060, China.
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5
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Ying Q, Wu G. Molecular mechanisms involved in podocyte EMT and concomitant diabetic kidney diseases: an update. Ren Fail 2017; 39:474-483. [PMID: 28413908 PMCID: PMC6014344 DOI: 10.1080/0886022x.2017.1313164] [Citation(s) in RCA: 81] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
Epithelial–mesenchymal transition (EMT) is a tightly regulated process by which epithelial cells lose their hallmark epithelial characteristics and gain the features of mesenchymal cells. For podocytes, expression of nephrin, podocin, P-cadherin, and ZO-1 is downregulated, the slit diaphragm (SD) will be altered, and the actin cytoskeleton will be rearranged. Diabetes, especially hyperglycemia, has been demonstrated to incite podocyte EMT through several molecular mechanisms such as TGF-β/Smad classic pathway, Wnt/β-catenin signaling pathway, Integrins/integrin-linked kinase (ILK) signaling pathway, MAPKs signaling pathway, Jagged/Notch signaling pathway, and NF-κB signaling pathway. As one of the most fundamental prerequisites to develop ground-breaking therapeutic options to prevent the development and progression of diabetic kidney disease (DKD), a comprehensive understanding of the molecular mechanisms involved in the pathogenesis of podocyte EMT is compulsory. Therefore, the purpose of this paper is to update the research progress of these underlying signaling pathways and expound the podocyte EMT-related DKDs.
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Affiliation(s)
- Qidi Ying
- a Department of Pharmacology, Pharmacy , China Pharmaceutical University , Nanjing , Jiangsu , China
| | - Guanzhong Wu
- a Department of Pharmacology, Pharmacy , China Pharmaceutical University , Nanjing , Jiangsu , China
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Mega C, Teixeira-de-Lemos E, Fernandes R, Reis F. Renoprotective Effects of the Dipeptidyl Peptidase-4 Inhibitor Sitagliptin: A Review in Type 2 Diabetes. J Diabetes Res 2017; 2017:5164292. [PMID: 29098166 PMCID: PMC5643039 DOI: 10.1155/2017/5164292] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2017] [Accepted: 07/12/2017] [Indexed: 12/13/2022] Open
Abstract
Diabetic nephropathy (DN) is now the single commonest cause of end-stage renal disease (ESRD) worldwide and one of the main causes of death in diabetic patients. It is also acknowledged as an independent risk factor for cardiovascular disease (CVD). Since sitagliptin was approved, many studies have been carried out revealing its ability to not only improve metabolic control but also ameliorate dysfunction in various diabetes-targeted organs, especially the kidney, due to putative underlying cytoprotective properties, namely, its antiapoptotic, antioxidant, anti-inflammatory, and antifibrotic properties. Despite overall recommendations, many patients spend a long time well outside the recommended glycaemic range and, therefore, have an increased risk for developing micro- and macrovascular complications. Currently, it is becoming clearer that type 2 diabetes mellitus (T2DM) management must envision not only the improvement in glycaemic control but also, and particularly, the prevention of pancreatic deterioration and the evolution of complications, such as DN. This review aims to provide an overview of the current knowledge in the field of renoprotective actions of sitagliptin, namely, improvement in diabetic dysmetabolism, hemodynamic factors, renal function, diabetic kidney lesions, and cytoprotective properties.
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Affiliation(s)
- Cristina Mega
- Agrarian School of Viseu (ESAV), Polytechnic Institute of Viseu (IPV), 3500-606 Viseu, Portugal
- Centre for the Study of Education, Technologies and Health (CI&DETS), Polytechnic Institute of Viseu (IPV), 3500-606 Viseu, Portugal
- Institute of Pharmacology and Experimental Therapeutics and Institute for Biomedical Imaging and Life Sciences (IBILI), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
| | - Edite Teixeira-de-Lemos
- Agrarian School of Viseu (ESAV), Polytechnic Institute of Viseu (IPV), 3500-606 Viseu, Portugal
- Centre for the Study of Education, Technologies and Health (CI&DETS), Polytechnic Institute of Viseu (IPV), 3500-606 Viseu, Portugal
| | - Rosa Fernandes
- Institute of Pharmacology and Experimental Therapeutics and Institute for Biomedical Imaging and Life Sciences (IBILI), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
- CNC.IBILI Research Consortium, University of Coimbra, 3004-504 Coimbra, Portugal
| | - Flávio Reis
- Institute of Pharmacology and Experimental Therapeutics and Institute for Biomedical Imaging and Life Sciences (IBILI), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
- CNC.IBILI Research Consortium, University of Coimbra, 3004-504 Coimbra, Portugal
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Dab1 Contributes to Angiotensin II-Induced Apoptosis via p38 Signaling Pathway in Podocytes. BIOMED RESEARCH INTERNATIONAL 2017; 2017:2484303. [PMID: 28676854 PMCID: PMC5476836 DOI: 10.1155/2017/2484303] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2017] [Revised: 04/16/2017] [Accepted: 05/10/2017] [Indexed: 12/24/2022]
Abstract
Numerous studies have found that angiotensin II (Ang II) participates in podocyte apoptosis and exacerbates progression of end-stage kidney disease (ESKD). However, its underlying mechanism remains largely unexplored. As a homolog of Drosophila disabled (Dab) protein, Dab1 plays a vital role in cytoskeleton, neuronal migration, and proliferation. In the present study, our data revealed that Ang II-infused rats developed hypertension, proteinuria, and podocyte injury accompanied by Dab1 phosphorylation and increased reelin expression in kidney. Moreover, Ang II induced podocyte apoptosis in vitro. Dab1 phosphorylation and reelin expression in podocytes were increased after exposure to Ang II. Conversely, Dab1 small interfering RNA (siRNA) exerted protective effects on Ang II-induced podocyte apoptosis, resulting in decreased p38 phosphorylation and reelin expression. These results indicated that Dab1 mediated Ang II-induced podocyte apoptosis via p38 signaling pathway.
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FTY720 Attenuates Angiotensin II-Induced Podocyte Damage via Inhibiting Inflammatory Cytokines. Mediators Inflamm 2017; 2017:3701385. [PMID: 28270699 PMCID: PMC5320072 DOI: 10.1155/2017/3701385] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Revised: 12/08/2016] [Accepted: 12/26/2016] [Indexed: 12/29/2022] Open
Abstract
FTY720, a new chemical substance derived from the ascomycete Isaria sinclairii, is used for treating multiple sclerosis, renal cancer, and asthma. Sphingosine 1-phosphate (S1P) is a bioactive sphingolipid metabolite and exists in red blood cells. FTY720 is a synthetic S1P analog which can block S1P evoking physiological effects. Recently studies show that S1P was participating in activated inflammation cells induced renal injury. The objective of this study was to assess the protective effect of FTY720 on kidney damage and the potential mechanism of FTY720 which alleviate podocyte injury in chronic kidney disease. In this study, we selected 40 patients with IgA nephropathy and examined their clinical characteristics. Ang II-infusion rat renal injury model was established to evaluate the glomeruli and tubulointerstitial lesion. The result showed that the concentration of S1P in serum and urine was positively correlated with IgA nephropathy patients' renal injury. FTY720 could reduce renal histological lesions induced by Ang II-infusion in rats. Moreover, FTY720 decreased S1P synthesis in Ang II-infusion rats via downregulation of inflammatory cytokines including TNF-α and IL-6. In addition, FTY720 alleviated exogenous S1P-induced podocyte damage. In conclusion, FTY720 is able to attenuate S1P-induced podocyte damage via reducing inflammatory cytokines.
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CD2-associated protein/phosphoinositide 3-kinase signaling has a preventive role in angiotensin II-induced podocyte apoptosis. Int J Biochem Cell Biol 2016; 79:370-381. [DOI: 10.1016/j.biocel.2016.08.042] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2016] [Revised: 08/19/2016] [Accepted: 08/29/2016] [Indexed: 01/13/2023]
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Ma Y, Yang Q, Chen X, Liang W, Ren Z, Ding G. c-Abl contributes to glucose-promoted apoptosis via p53 signaling pathway in podocytes. Diabetes Res Clin Pract 2016; 113:171-8. [PMID: 26810274 DOI: 10.1016/j.diabres.2015.12.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Revised: 11/05/2015] [Accepted: 12/26/2015] [Indexed: 02/07/2023]
Abstract
AIM To investigate the role of the non-receptor tyrosine kinase c-Abl in high glucose-induced podocyte injury and its possible signal transduction pathway. METHODS Sixteen C57BL/6 mice were randomly assigned to a group with diabetes and a normal control group. Subsequently, differentiated mouse podocytes were exposed to high-glucose conditions, and podocyte apoptosis was then assessed by flow cytometry and Hoechst 33258 staining. Western blot and immunofluorescence assay were used to measure c-Abl expression. Co-immunoprecipitation assay was used and c-Abl siRNA was applied to evaluate the interaction between c-Abl and p53. RESULTS High glucose promotes podocyte apoptosis. The c-Abl expression in podocytes was increased after exposure to high glucose, stimulating the p53 signaling pathway. Conversely, treatment with c-Abl siRNA restored high glucose-promoted podocyte apoptosis and resulted in the reduction of p53 expression. CONCLUSION c-Abl contributes to high glucose-induced podocyte apoptosis via p53 signaling pathway.
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Affiliation(s)
- Yiqiong Ma
- Division of Nephrology, Renmin Hospital of Wuhan University, 238 Jiefang Road, Wuhan 430060, Hubei, China
| | - Qian Yang
- Division of Nephrology, Renmin Hospital of Wuhan University, 238 Jiefang Road, Wuhan 430060, Hubei, China
| | - Xinghua Chen
- Division of Nephrology, Renmin Hospital of Wuhan University, 238 Jiefang Road, Wuhan 430060, Hubei, China
| | - Wei Liang
- Division of Nephrology, Renmin Hospital of Wuhan University, 238 Jiefang Road, Wuhan 430060, Hubei, China
| | - Zhilong Ren
- Division of Nephrology, Renmin Hospital of Wuhan University, 238 Jiefang Road, Wuhan 430060, Hubei, China
| | - Guohua Ding
- Division of Nephrology, Renmin Hospital of Wuhan University, 238 Jiefang Road, Wuhan 430060, Hubei, China.
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Wang S, Chen C, Su K, Zha D, Liang W, Hillebrands JL, Goor HV, Ding G. Angiotensin II induces reorganization of the actin cytoskeleton and myosin light-chain phosphorylation in podocytes through rho/ROCK-signaling pathway. Ren Fail 2015; 38:268-75. [PMID: 26652313 DOI: 10.3109/0886022x.2015.1117896] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
AIMS In the present study, we have evaluated the effect of angiotensin II (Ang II) on actin cytoskeleton reorganization and myosin light-chain (MLC) phosphorylation in podocytes to demonstrate whether the Rho/Rho-associated coiled kinase (ROCK) pathway is involved podocyte injury. METHODS Eighteen male Sprague-Dawley rats were divided into three groups and treated with Ang II, saline or telmisartan. Morphological changes were studied at 28 days after treatment. Immunohistochemistry and Western blotting were used to determine the renal expression of p-MLC and ROCK2. Cultured podocytes were treated with Ang II (10(-7 )M) with or without Rho-kinase inhibitor (Y27632, 10(-6 )M) for variable time periods. F-actin was visualized with fluorescein isothiocyanate (FITC)-conjugated phalloidin or tetraethyl rhodamine isothiocyanate (TRITC)-conjugated phalloidin. p-MLC expression was evaluated by immunofluorescence and Western blot. The activation of Rho/ROCK was evaluated by Western blot. RESULTS The expression of p-MLC in glomeruli increased significantly in rats treated with Ang II when compared to the control rats as shown by Western blot (p < 0.05). In cultured podocytes, Rho A and ROCK2 increased after incubation with Ang II. Ang II increased the expression of ROCK2, which was accompanied with altered morphology, redistribution of actin and increased phosphorylation of MLC. The distribution of actin changed to a large extent, although overall quantitative differences were not observed. Addition of Y-27632 to podocytes treated with Ang II could ameliorate F-actin cytoskeleton remodeling and the increment in p-MLC expression. CONCLUSION Ang II-induced podocyte cytoskeleton protein expression changing through the RhoA/ROCK2 p-MLC/F-actin pathway.
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Affiliation(s)
- Siyuan Wang
- a Department of Nephrology , Renmin Hospital of Wuhan University , Wuhan , Hubei , China.,b Department of General , Tongji Medical College, Huazhong University of Science & Technology, The Central Hospital of Wuhan , Wuhan , Hubei , China
| | - Cheng Chen
- a Department of Nephrology , Renmin Hospital of Wuhan University , Wuhan , Hubei , China.,c Department of Pathology and Medical Biology , University of Groningen, University Medical Center Groningen , Groningen , The Netherlands
| | - Ke Su
- a Department of Nephrology , Renmin Hospital of Wuhan University , Wuhan , Hubei , China
| | - Dongqing Zha
- a Department of Nephrology , Renmin Hospital of Wuhan University , Wuhan , Hubei , China
| | - Wei Liang
- a Department of Nephrology , Renmin Hospital of Wuhan University , Wuhan , Hubei , China
| | - J L Hillebrands
- c Department of Pathology and Medical Biology , University of Groningen, University Medical Center Groningen , Groningen , The Netherlands
| | - Harry van Goor
- c Department of Pathology and Medical Biology , University of Groningen, University Medical Center Groningen , Groningen , The Netherlands
| | - Guohua Ding
- a Department of Nephrology , Renmin Hospital of Wuhan University , Wuhan , Hubei , China
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12
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Yang Q, Ma Y, Liu Y, Liang W, Chen X, Ren Z, Wang H, Singhal PC, Ding G. Angiotensin II down-regulates nephrin-Akt signaling and induces podocyte injury: roleof c-Abl. Mol Biol Cell 2015; 27:197-208. [PMID: 26510503 PMCID: PMC4694757 DOI: 10.1091/mbc.e15-04-0223] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2015] [Accepted: 10/23/2015] [Indexed: 11/17/2022] Open
Abstract
Ang II plays a vital role in the initiation and progression of proteinuric kidney diseases, but the mechanism is still elusive. It is shown that c-Abl is a molecular chaperone of nephrin signaling and the SHIP2-Akt pathway, and released c-Abl from nephrin is involved in Ang II–induced podocyte injury. Recent studies have shown that nephrin plays a vital role in angiotensin II (Ang II)–induced podocyte injury and thus contributes to the onset of proteinuria and the progression of renal diseases, but its specific mechanism remains unclear. c-Abl is an SH2/SH3 domain–containing nonreceptor tyrosine kinase that is involved in cell survival and regulation of the cytoskeleton. Phosphorylated nephrin is able to interact with molecules containing SH2/SH3 domains, suggesting that c-Abl may be a downstream molecule of nephrin signaling. Here we report that Ang II–infused rats developed proteinuria and podocyte damage accompanied by nephrin dephosphorylation and minimal interaction between nephrin and c-Abl. In vitro, Ang II induced podocyte injury and nephrin and Akt dephosphorylation, which occurred in tandem with minimal interaction between nephrin and c-Abl. Moreover, Ang II promoted c-Abl phosphorylation and interaction between c-Abl and SH2 domain–containing 5′-inositol phosphatase 2 (SHIP2). c-Abl small interfering RNA (siRNA) and STI571 (c-Abl inhibitor) provided protection against Ang II–induced podocyte injury, suppressed the Ang II-induced c-Abl–SHIP2 interaction and SHIP2 phosphorylation, and maintained a stable level of nephrin phosphorylation. These results indicate that c-Abl is a molecular chaperone of nephrin signaling and the SHIP2-Akt pathway and that the released c-Abl contributes to Ang II–induced podocyte injury.
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Affiliation(s)
- Qian Yang
- Division of Nephrology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China
| | - Yiqiong Ma
- Division of Nephrology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China
| | - Yipeng Liu
- Division of Nephrology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China
| | - Wei Liang
- Division of Nephrology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China
| | - Xinghua Chen
- Division of Nephrology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China
| | - Zhilong Ren
- Division of Nephrology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China
| | - Huiming Wang
- Division of Nephrology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China
| | - Pravin C Singhal
- Renal Molecular Research Laboratory, Feinstein Institute for Medical Research, Hofstra North Shore-Long Island Medical School, Great Neck, NY 11021
| | - Guohua Ding
- Division of Nephrology, Renmin Hospital of Wuhan University, Wuhan, Hubei 430060, China
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Wen Y, Zhou P, Liu L, Wang Z, Zhang Y, Liang J. Effect of the knockdown of Cabin1 on p53 in glomerular podocyte. J Recept Signal Transduct Res 2015; 36:173-80. [DOI: 10.3109/10799893.2015.1069847] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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14
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Ayoub MA, Zhang Y, Kelly RS, See HB, Johnstone EKM, McCall EA, Williams JH, Kelly DJ, Pfleger KDG. Functional interaction between angiotensin II receptor type 1 and chemokine (C-C motif) receptor 2 with implications for chronic kidney disease. PLoS One 2015; 10:e0119803. [PMID: 25807547 PMCID: PMC4373786 DOI: 10.1371/journal.pone.0119803] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2014] [Accepted: 02/02/2015] [Indexed: 11/18/2022] Open
Abstract
Understanding functional interactions between G protein-coupled receptors is of great physiological and pathophysiological importance. Heteromerization provides one important potential mechanism for such interaction between different signalling pathways via macromolecular complex formation. Previous studies suggested a functional interplay between angiotensin II receptor type 1 (AT1) and Chemokine (C-C motif) Receptor 2 (CCR2). However the molecular mechanisms are not understood. We investigated AT1-CCR2 functional interaction in vitro using bioluminescence resonance energy transfer in HEK293 cells and in vivo using subtotal-nephrectomized rats as a well-established model for chronic kidney disease. Our data revealed functional heteromers of these receptors resulting in CCR2-Gαi1 coupling being sensitive to AT1 activation, as well as apparent enhanced β-arrestin2 recruitment with agonist co-stimulation that is synergistically reversed by combined antagonist treatment. Moreover, we present in vivo findings where combined treatment with AT1- and CCR2-selective inhibitors was synergistically beneficial in terms of decreasing proteinuria, reducing podocyte loss and preventing renal injury independent of blood pressure in the subtotal-nephrectomized rat model. Our findings further support a role for G protein-coupled receptor functional heteromerization in pathophysiology and provide insights into previous observations indicating the importance of AT1-CCR2 functional interaction in inflammation, renal and hypertensive disorders.
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Affiliation(s)
- Mohammed Akli Ayoub
- Molecular Endocrinology and Pharmacology, Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands, Western Australia, Australia
- Centre for Medical Research, The University of Western Australia, Crawley, Western Australia, Australia
| | - Yuan Zhang
- Department of Medicine, St. Vincent's Hospital, The University of Melbourne, Melbourne, Victoria, Australia
| | - Robyn S. Kelly
- Department of Medicine, St. Vincent's Hospital, The University of Melbourne, Melbourne, Victoria, Australia
| | - Heng B. See
- Molecular Endocrinology and Pharmacology, Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands, Western Australia, Australia
- Centre for Medical Research, The University of Western Australia, Crawley, Western Australia, Australia
| | - Elizabeth K. M. Johnstone
- Molecular Endocrinology and Pharmacology, Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands, Western Australia, Australia
- Centre for Medical Research, The University of Western Australia, Crawley, Western Australia, Australia
| | | | | | - Darren J. Kelly
- Department of Medicine, St. Vincent's Hospital, The University of Melbourne, Melbourne, Victoria, Australia
| | - Kevin D. G. Pfleger
- Molecular Endocrinology and Pharmacology, Harry Perkins Institute of Medical Research, QEII Medical Centre, Nedlands, Western Australia, Australia
- Centre for Medical Research, The University of Western Australia, Crawley, Western Australia, Australia
- Dimerix Bioscience Limited, Nedlands, Western Australia, Australia
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15
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Márquez E, Riera M, Pascual J, Soler MJ. Renin-angiotensin system within the diabetic podocyte. Am J Physiol Renal Physiol 2014; 308:F1-10. [PMID: 25339703 DOI: 10.1152/ajprenal.00531.2013] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Diabetic kidney disease is the leading cause of end-stage renal disease. Podocytes are differentiated cells necessary for the development and maintenance of the glomerular basement membrane and the capillary tufts, as well as the function of the glomerular filtration barrier. The epithelial glomerular cells express a local renin-angiotensin system (RAS) that varies in different pathological situations such as hyperglycemia or mechanical stress. RAS components have been shown to be altered in diabetic podocytopathy, and their modulation may modify diabetic nephropathy progression. Podocytes are a direct target for angiotensin II-mediated injury by altered expression and distribution of podocyte proteins. Furthermore, angiotensin II promotes podocyte injury indirectly by inducing cellular hypertrophy, increased apoptosis, and changes in the anionic charge of the glomerular basement membrane, among other effects. RAS blockade has been shown to decrease the level of proteinuria and delay the progression of chronic kidney disease. This review summarizes the local intraglomerular RAS and its imbalance in diabetic podocytopathy. A better understanding of the intrapodocyte RAS might provide a new approach for diabetic kidney disease treatment.
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Affiliation(s)
- Eva Márquez
- Department of Nephrology, Hospital del Mar, Barcelona, Spain; IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain; and
| | - Marta Riera
- Department of Nephrology, Hospital del Mar, Barcelona, Spain; IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain; and Red de Investigación Renal (REDINREN), Instituto Carlos III, Madrid, Spain
| | - Julio Pascual
- Department of Nephrology, Hospital del Mar, Barcelona, Spain; IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain; and Red de Investigación Renal (REDINREN), Instituto Carlos III, Madrid, Spain
| | - María José Soler
- Department of Nephrology, Hospital del Mar, Barcelona, Spain; IMIM (Hospital del Mar Medical Research Institute), Barcelona, Spain; and Red de Investigación Renal (REDINREN), Instituto Carlos III, Madrid, Spain
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