ArticleThe American journal of pathology2025
Injured Proximal Tubular Epithelial Cells Lose Hepatocyte Nuclear Factor 4α Expression Crucial for Brush Border Formation and Transport.
Article in The American journal of pathology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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2 citing papers in PubMed.
- HNF4A maintains proximal tubule identity and limits injury-associated cell states in the adult mouse kidney.bioRxiv : the preprint server for biology · 2026Article
- Epithelial-Immune-Stromal Interactions Define Divergent Repair and Fibrosis Pathways After Acute Kidney Injury in Human Renal Transplants.bioRxiv : the preprint server for biology · 2025Article
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9 authors.
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Abstract
Recent studies have demonstrated that the transcription factor hepatocyte nuclear factor 4α (HNF4A) drives epithelial differentiation in the renal proximal tubules (PTs) and is critical for maintaining a mature PT phenotype. Furthermore, HNF4A down-regulation has been observed following kidney injury in mouse models. The aim of the present work was to investigate the role of HNF4A during acute and chronic human kidney disease and the loss of the mature PT phenotype in cultured PT cells. Loss of HNF4A expression and gain of vimentin expression were reciprocal and gradual during both acute and chronic kidney disease, as indicated by immunohistochemistry. Healthy human kidneys demonstrated partial or total loss of HNF4A expression in vimentin-positive scattered tubular cells. Primary cell isolation and subculture of PT cells recapitulated HNF4A-associated loss of the PT phenotype. Re-expression of HNF4A in cultured PT cells by adenoviral transduction increased transcripts related to brush border formation as well as absorptive and transport processes, as shown by RNA sequencing and gene set enrichment analyses. Thus, the reduction of HNF4A and increase of vimentin expression were connected to both acute and chronic kidney disease and represented a stereotypic injury response of the PT, resulting in dedifferentiation. HNF4A re-expression in cultured primary PT cells could provide a more reliable and predictive in vitro model to study PT function and injury.
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