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von Rauchhaupt E, Klaus M, Ribeiro A, Honarpisheh M, Li C, Liu M, Köhler P, Adamowicz K, Schmaderer C, Lindenmeyer M, Steiger S, Anders HJ, Lech M. GDF-15 Suppresses Puromycin Aminonucleoside-Induced Podocyte Injury by Reducing Endoplasmic Reticulum Stress and Glomerular Inflammation. Cells 2024; 13:637. [PMID: 38607075 PMCID: PMC11011265 DOI: 10.3390/cells13070637] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Revised: 03/22/2024] [Accepted: 03/30/2024] [Indexed: 04/13/2024] Open
Abstract
GDF15, also known as MIC1, is a member of the TGF-beta superfamily. Previous studies reported elevated serum levels of GDF15 in patients with kidney disorder, and its association with kidney disease progression, while other studies identified GDF15 to have protective effects. To investigate the potential protective role of GDF15 on podocytes, we first performed in vitro studies using a Gdf15-deficient podocyte cell line. The lack of GDF15 intensified puromycin aminonucleoside (PAN)-triggered endoplasmic reticulum stress and induced cell death in cultivated podocytes. This was evidenced by elevated expressions of Xbp1 and ER-associated chaperones, alongside AnnexinV/PI staining and LDH release. Additionally, we subjected mice to nephrotoxic PAN treatment. Our observations revealed a noteworthy increase in both GDF15 expression and secretion subsequent to PAN administration. Gdf15 knockout mice displayed a moderate loss of WT1+ cells (podocytes) in the glomeruli compared to wild-type controls. However, this finding could not be substantiated through digital evaluation. The parameters of kidney function, including serum BUN, creatinine, and albumin-creatinine ratio (ACR), were increased in Gdf15 knockout mice as compared to wild-type mice upon PAN treatment. This was associated with an increase in the number of glomerular macrophages, neutrophils, inflammatory cytokines, and chemokines in Gdf15-deficient mice. In summary, our findings unveil a novel renoprotective effect of GDF15 during kidney injury and inflammation by promoting podocyte survival and regulating endoplasmic reticulum stress in podocytes, and, subsequently, the infiltration of inflammatory cells via paracrine effects on surrounding glomerular cells.
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Affiliation(s)
- Ekaterina von Rauchhaupt
- Department of Medicine IV, Renal Division, Ludwig-Maximilians-University Hospital, Ludwig-Maximilians-University Munich, 80336 Munich, Germany; (E.v.R.); (M.K.); (A.R.); (M.H.); (C.L.); (M.L.); (P.K.); (S.S.); (H.-J.A.)
| | - Martin Klaus
- Department of Medicine IV, Renal Division, Ludwig-Maximilians-University Hospital, Ludwig-Maximilians-University Munich, 80336 Munich, Germany; (E.v.R.); (M.K.); (A.R.); (M.H.); (C.L.); (M.L.); (P.K.); (S.S.); (H.-J.A.)
| | - Andrea Ribeiro
- Department of Medicine IV, Renal Division, Ludwig-Maximilians-University Hospital, Ludwig-Maximilians-University Munich, 80336 Munich, Germany; (E.v.R.); (M.K.); (A.R.); (M.H.); (C.L.); (M.L.); (P.K.); (S.S.); (H.-J.A.)
- Klinikum Rechts der Isar, Department of Nephrology, Technical University Munich, 81675 Munich, Germany;
| | - Mohsen Honarpisheh
- Department of Medicine IV, Renal Division, Ludwig-Maximilians-University Hospital, Ludwig-Maximilians-University Munich, 80336 Munich, Germany; (E.v.R.); (M.K.); (A.R.); (M.H.); (C.L.); (M.L.); (P.K.); (S.S.); (H.-J.A.)
| | - Chenyu Li
- Department of Medicine IV, Renal Division, Ludwig-Maximilians-University Hospital, Ludwig-Maximilians-University Munich, 80336 Munich, Germany; (E.v.R.); (M.K.); (A.R.); (M.H.); (C.L.); (M.L.); (P.K.); (S.S.); (H.-J.A.)
| | - Min Liu
- Department of Medicine IV, Renal Division, Ludwig-Maximilians-University Hospital, Ludwig-Maximilians-University Munich, 80336 Munich, Germany; (E.v.R.); (M.K.); (A.R.); (M.H.); (C.L.); (M.L.); (P.K.); (S.S.); (H.-J.A.)
| | - Paulina Köhler
- Department of Medicine IV, Renal Division, Ludwig-Maximilians-University Hospital, Ludwig-Maximilians-University Munich, 80336 Munich, Germany; (E.v.R.); (M.K.); (A.R.); (M.H.); (C.L.); (M.L.); (P.K.); (S.S.); (H.-J.A.)
| | - Karina Adamowicz
- Department of Microbiology, Faculty of Biochemistry, Biophysics and Biotechnology of Jagiellonian University, 30-387 Krakow, Poland;
| | - Christoph Schmaderer
- Klinikum Rechts der Isar, Department of Nephrology, Technical University Munich, 81675 Munich, Germany;
| | - Maja Lindenmeyer
- III Department of Medicine, University Medical Center Hamburg-Eppendorf, 20251 Hamburg, Germany;
| | - Stefanie Steiger
- Department of Medicine IV, Renal Division, Ludwig-Maximilians-University Hospital, Ludwig-Maximilians-University Munich, 80336 Munich, Germany; (E.v.R.); (M.K.); (A.R.); (M.H.); (C.L.); (M.L.); (P.K.); (S.S.); (H.-J.A.)
| | - Hans-Joachim Anders
- Department of Medicine IV, Renal Division, Ludwig-Maximilians-University Hospital, Ludwig-Maximilians-University Munich, 80336 Munich, Germany; (E.v.R.); (M.K.); (A.R.); (M.H.); (C.L.); (M.L.); (P.K.); (S.S.); (H.-J.A.)
| | - Maciej Lech
- Department of Medicine IV, Renal Division, Ludwig-Maximilians-University Hospital, Ludwig-Maximilians-University Munich, 80336 Munich, Germany; (E.v.R.); (M.K.); (A.R.); (M.H.); (C.L.); (M.L.); (P.K.); (S.S.); (H.-J.A.)
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Song L, Shen W, Wang L, Song J, Tu W, Ke B, Fang X. Annexin A1 may contribute to the morphological changes in podocytes by mediating endocytic vesicle fusion and transport via promotion of SNARE assembly in idiopathic membranous nephropathy. Nephrology (Carlton) 2024; 29:76-85. [PMID: 37927194 DOI: 10.1111/nep.14247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2023] [Revised: 09/27/2023] [Accepted: 10/02/2023] [Indexed: 11/07/2023]
Abstract
BACKGROUND Annexin A1 is a membrane-associated calcium-binding protein that participates in the progression of many diseases by facilitating vesicle aggregation. It has been documented that reducing vesicle formation alleviates podocyte injury and albuminuria in idiopathic membranous nephropathy (IMN). However, the role of Annexin A1 (ANXA1) in IMN is unknown. METHODS Electron microscopy was used to observe the numbers of vesicles in podocytes. The expression of ANXA1 in IMN was investigated by bioinformatics analysis. We validated the hub genes with the Nephroseq V5 online tool and microarray data from the GEO. Immunohistochemical staining and qPCR were performed to measure gene and protein expression. RESULTS The numbers of vesicles in IMN podocytes were significantly increased. Bioinformatics analysis showed that ANXA1, one of the differentially expressed genes, was upregulated in glomeruli from IMN patients. In the validation database and dataset, we confirmed that ANXA1 expression was upregulated in the glomeruli of IMN patients. We revealed that the increased expression of ANXA1 was negatively correlated with the glomerular filtration rate (GFR) and proteinuria. Moreover, ANXA1 was enriched in the biological process of vesicle fusion, in which the expression of SNAREs and the SNARE complex was increased. Finally, the expression of ANXA1 and genes related to SNAREs and the SNARE complex was upregulated in glomeruli from IMN patients according to immunohistochemical staining and qPCR. CONCLUSION We conclude that ANXA1 may mediate endocytic vesicle fusion and transport by promoting SNARE assembly, contributing to the morphological changes in podocytes and massive proteinuria in IMN.
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Affiliation(s)
- Lei Song
- Department of General Medicine, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Wen Shen
- Department of Cardiovascular Medicine, The Second Affiliated Hospital to Nanchang University, Nanchang, China
| | - Le Wang
- Department of Blood Transfusion, The Second Affiliated Hospital to Nanchang University, Nanchang, China
| | - Jianling Song
- Department of Nephrology, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Weiping Tu
- Department of Nephrology, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Ben Ke
- Department of Nephrology, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Xiangdong Fang
- Department of Nephrology, The Second Affiliated Hospital of Nanchang University, Nanchang, China
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