PMID- 34716242 OWN - NLM STAT- MEDLINE DCOM- 20211214 LR - 20230203 IS - 1533-3450 (Electronic) IS - 1046-6673 (Print) IS - 1046-6673 (Linking) VI - 32 IP - 11 DP - 2021 Nov TI - Glomerular Endothelial Cell-Derived microRNA-192 Regulates Nephronectin Expression in Idiopathic Membranous Glomerulonephritis. PG - 2777-2794 LID - 10.1681/ASN.2020121699 [doi] AB - BACKGROUND: Autoantibodies binding to podocyte antigens cause idiopathic membranous glomerulonephritis (iMGN). However, it remains elusive how autoantibodies reach the subepithelial space because the glomerular filtration barrier (GFB) is size selective and almost impermeable for antibodies. METHODS: Kidney biopsies from patients with iMGN, cell culture, zebrafish, and mouse models were used to investigate the role of nephronectin (NPNT) regulating microRNAs (miRs) for the GFB. RESULTS: Glomerular endothelial cell (GEC)-derived miR-192-5p and podocyte-derived miR-378a-3p are upregulated in urine and glomeruli of patients with iMGN, whereas glomerular NPNT is reduced. Overexpression of miR-192-5p and morpholino-mediated npnt knockdown induced edema, proteinuria, and podocyte effacement similar to podocyte-derived miR-378a-3p in zebrafish. Structural changes of the glomerular basement membrane (GBM) with increased lucidity, splitting, and lamellation, especially of the lamina rara interna, similar to ultrastructural findings seen in advanced stages of iMGN, were found. IgG-size nanoparticles accumulated in lucidity areas of the lamina rara interna and lamina densa of the GBM in npnt-knockdown zebrafish models. Loss of slit diaphragm proteins and severe structural impairment of the GBM were further confirmed in podocyte-specific Npnt knockout mice. GECs downregulate podocyte NPNT by transfer of miR-192-5p-containing exosomes in a paracrine manner. CONCLUSIONS: Podocyte NPNT is important for proper glomerular filter function and GBM structure and is regulated by GEC-derived miR-192-5p and podocyte-derived miR-378a-3p. We hypothesize that loss of NPNT in the GBM is an important part of the initial pathophysiology of iMGN and enables autoantigenicity of podocyte antigens and subepithelial immune complex deposition in iMGN. CI - Copyright (c) 2021 by the American Society of Nephrology. FAU - Muller-Deile, Janina AU - Muller-Deile J AD - Department of Nephrology, Friedrich-Alexander-Universitat Erlangen-Nurnberg, Erlangen, Germany. FAU - Sopel, Nina AU - Sopel N AD - Department of Nephrology, Friedrich-Alexander-Universitat Erlangen-Nurnberg, Erlangen, Germany. FAU - Ohs, Alexandra AU - Ohs A AD - Department of Nephrology, Friedrich-Alexander-Universitat Erlangen-Nurnberg, Erlangen, Germany. FAU - Rose, Victoria AU - Rose V AD - Department of Nephrology, Friedrich-Alexander-Universitat Erlangen-Nurnberg, Erlangen, Germany. FAU - Groner, Marwin AU - Groner M AD - Research Center On Rare Kidney Diseases (RECORD), University Hospital Erlangen, Erlangen, Germany. FAU - Wrede, Christoph AU - Wrede C AD - Institute of Functional and Applied Anatomy, Medizinische Hochschule Hannover, Hannover, Germany. FAU - Hegermann, Jan AU - Hegermann J AD - Institute of Functional and Applied Anatomy, Medizinische Hochschule Hannover, Hannover, Germany. FAU - Daniel, Christoph AU - Daniel C AD - Department of Nephropathology, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany. FAU - Amann, Kerstin AU - Amann K AD - Department of Nephropathology, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany. FAU - Zahner, Gunther AU - Zahner G AD - Department of Medicine, Universitatsklinikum Hamburg-Eppendorf, Hamburg, Germany. FAU - Schiffer, Mario AU - Schiffer M AD - Department of Nephrology, Friedrich-Alexander-Universitat Erlangen-Nurnberg, Erlangen, Germany. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - J Am Soc Nephrol JT - Journal of the American Society of Nephrology : JASN JID - 9013836 RN - 0 (Antigen-Antibody Complex) RN - 0 (Autoantigens) RN - 0 (Extracellular Matrix Proteins) RN - 0 (MIRN192 microRNA, human) RN - 0 (MIRN378 microRNA, human) RN - 0 (MicroRNAs) RN - 0 (Zebrafish Proteins) RN - 0 (nephronectin) RN - CKS1YQ9W1J (Gold Sodium Thiosulfate) SB - IM MH - Animals MH - Antigen-Antibody Complex/analysis MH - Autoantigens/genetics/immunology MH - Cells, Cultured MH - Coculture Techniques MH - Endothelial Cells/*metabolism MH - Exosomes/metabolism MH - Extracellular Matrix Proteins/*biosynthesis/deficiency/physiology MH - Gene Expression Regulation MH - Gene Targeting MH - Glomerular Basement Membrane/immunology/*metabolism/*physiopathology/ultrastructure MH - Glomerulonephritis, Membranous/*genetics/immunology/metabolism/physiopathology MH - Gold Sodium Thiosulfate MH - Humans MH - Kidney Glomerulus/*metabolism MH - Metal Nanoparticles MH - Mice MH - MicroRNAs/biosynthesis/genetics/*physiology/urine MH - Paracrine Communication MH - Permeability MH - Podocytes/immunology/metabolism MH - Proteinuria/etiology MH - Transfection MH - Zebrafish MH - Zebrafish Proteins/deficiency/genetics PMC - PMC8806098 OTO - NOTNLM OT - glomerular basement membrane OT - glomerular disease OT - glomerular endothelial cells OT - glomerular filtration barrier OT - membranous nephropathy OT - microRNAs OT - nephronectin OT - podocyte EDAT- 2021/10/31 06:00 MHDA- 2021/12/15 06:00 PMCR- 2022/11/01 CRDT- 2021/10/30 05:39 PHST- 2020/12/05 00:00 [received] PHST- 2021/07/09 00:00 [accepted] PHST- 2021/10/30 05:39 [entrez] PHST- 2021/10/31 06:00 [pubmed] PHST- 2021/12/15 06:00 [medline] PHST- 2022/11/01 00:00 [pmc-release] AID - 00001751-202111000-00015 [pii] AID - 2020121699 [pii] AID - 10.1681/ASN.2020121699 [doi] PST - ppublish SO - J Am Soc Nephrol. 2021 Nov;32(11):2777-2794. doi: 10.1681/ASN.2020121699.