ArticleCell biology and toxicology2024
S100A2 activation promotes interstitial fibrosis in kidneys by FoxO1-mediated epithelial-mesenchymal transition.
Article in Cell biology and toxicology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed.
- S100 Calcium-Binding Protein 16 (S100A16) Promotes Hepatic Stellate Cell Activation Via Erb-B2 Receptor Tyrosine Kinase 2 (ERBB2)-mediated Glycolysis to Facilitate Liver Fibrosis.Cell biochemistry and function · 2026Article
- Genome-wide DNA methylation analysis revealed epigenetic mechanism underlying end-stage renal disease.Nature communications · 2026Article
- ROP16 Promotes Epithelial-Mesenchymal Transition-Like Changes in Ocular Toxoplasmosis via STAT3 and TGF-β1 Pathways.Transboundary and emerging diseases · 2026Article
- Ginsenoside Rg1 Attenuates Renal Ischemia-Reperfusion Injury and Fibrosis by Suppressing Pro-Inflammatory Macrophage Activation.Journal of inflammation research · 2026Article
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11 authors.
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Abstract
backgroundRenal interstitial fibrosis (RIF) is a common feature of chronic kidney diseases (CKD), with epithelial-mesenchymal transition (EMT) being one of its important mechanisms. S100A2 is a protein associated with cell proliferation and differentiation, but its specific functions and molecular mechanisms in RIF remain to be determined.
methodsS100A2 levels were evaluated in three mouse models, including unilateral ureteral obstruction (UUO), ischemia-reperfusion injury (IRI), and aristolochic acid nephropathy (AAN), as well as in TGF-β1- treated HK-2 cells and in kidney tissue samples. Furthermore, the role of S100A2 and its interaction with FoxO1 was investigated using RT-qPCR, immunoblotting, immunofluorescence staining, co-immunoprecipitation (Co-IP), transcriptome sequencing, and gain- or loss-of-function approaches in vitro.
resultsElevated expression levels of S100A2 were observed in three mouse models and TGF-β1-treated HK2 cells, as well as in kidney tissue samples. Following siRNA silencing of S100A2, exposure to TGF-β1 in cultured HK-2 cells suppressed EMT process and extracellular matrix (ECM) accumulation. Conversely, Overexpression of S100A2 induced EMT and ECM deposition. Notably, we identified that S100A2-mediated EMT depends on FoxO1. Immunofluorescence staining indicated that S100A2 and FoxO1 colocalized in the nucleus and cytoplasm, and their interaction was verified in Co-IP assay. S100A2 knockdown decreased TGF-β1-induced phosphorylation of FoxO1 and increased its protein expression, whereas S100A2 overexpression hampered FoxO1 activation. Furthermore, pharmacological blockade of FoxO1 rescued the induction of TGF-β1 on EMT and ECM deposition in S100A2 siRNA-treated cells.
conclusionS100A2 activation exacerbates interstitial fibrosis in kidneys by facilitating FoxO1-mediated EMT.
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