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Single-Cell Analysis of Endothelial Cell Injury in IgA Nephropathy
Yong-Chang Yang1, Lin Zhu2,3, Jing-Ying Zhao1
1Department of Pediatrics, Shengjing Hospital of China Medical University, Shenyang, China.
Immunity, Inflammation and Disease
|February 13, 2025
Summary
This study reveals how interleukin-6 (IL-6) impacts renal endothelial cells in IgA nephropathy (IgAN). IL-6 negatively regulates VE-cadherin expression via Rac1, highlighting endothelial cell involvement in IgAN.
Area of Science:
- Nephrology
- Immunology
- Cell Biology
Background:
- Mechanisms of renal injury in IgA nephropathy (IgAN) remain unclear.
- Renal endothelial cells' role in IgAN pathogenesis requires further investigation.
Purpose of the Study:
- To investigate the involvement of renal endothelial cells in IgA nephropathy (IgAN) using single-cell RNA sequencing (scRNA-seq).
- To elucidate the molecular mechanisms by which renal endothelial cells contribute to IgAN.
Main Methods:
- scRNA-seq analysis of kidney biopsies from IgAN patients and controls.
- Bioinformatics analyses including differential gene expression, AUCell, and high-dimensional weighted gene co-expression network analysis (hdWGCNA).
- Validation using human renal glomerular endothelial cells (HRGECs) stimulated with IL-6 and Rac1 inhibitors.
Main Results:
- scRNA-seq identified distinct gene expression profiles in IgAN kidney tissues.
- Enrichment analysis revealed adhesion molecules and MAPK signaling pathways in IgAN renal endothelial cells.
- IL-6 was found to negatively regulate VE-cadherin expression in HRGECs through Rac1 activation.
Conclusions:
- Renal endothelial cells play a significant role in IgAN pathogenesis.
- IL-6 negatively regulates VE-cadherin expression in renal endothelial cells via Rac1, contributing to IgAN development.
