ArticleKidney international reports2025
Dysregulated Anaerobic Glycolysis in Podocytes is Relevant to the Progression of Focal Segmental Glomerulosclerosis.
Article in Kidney international reports, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Introduction: Minimal change disease (MCD) and focal segmental glomerulosclerosis (FSGS) are podocytopathies with varying clinical courses and therapeutic responses. FSGS often leads to end-stage renal disease. Consequently, their heterogeneity requires case stratification and pathophysiological elucidation. The involvement of energy metabolism in FSGS pathogenesis and stratification has not been clarified. Therefore, this study aimed to verify whether evaluating energy kinetics can be a new approach to MCD or FSGS stratification and explore the role of energy metabolism in MCD or FSGS. Methods: Cultured human podocytes were treated with sera from patients with biopsy-confirmed MCD or FSGS. Serum-treated podocytes were analyzed for apoptosis using flow cytometry, metabolomics via mass spectrometry, and real-time adenosine triphosphate (ATP) production rates using an extracellular flux analyzer. Adriamycin-induced nephropathy was induced in podocyte-specific lactate dehydrogenase (LDH) A (LDHA)-deficient and control mice. Results: The sera from patients with FSGS significantly induced apoptosis in human podocytes compared with those from individuals with MCD. Apoptosis severity was associated with segmental obliteration and corticosteroid resistance. Metabolomic analysis revealed differences in anaerobic glycolysis and tricarboxylic acid cycle (TCA)-related metabolites in podocytes exposed to the sera of patients with MCD and FSGS. In the podocytes treated with sera from patients with FSGS, glycolytic ATP production significantly decreased in cases with high apoptosis rates. The sera from patients with FSGS suppressed LDHA activity, suppressed α-actinin 4 (ACTN4) expression, and promoted actin remodeling of podocytes. Segmental sclerosis was more prominent in podocyte-specific LDHA-deficient mice with adriamycin-induced nephropathy than in control mice. Conclusion: FSGS progression was associated with decreased anaerobic glycolysis in podocytes.
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