Single-cell RNA profiling of glomerular cells shows dynamic changes in experimental diabetic kidney disease

Jia Fu, Kemal M. Akat, Zeguo Sun, Weijia Zhang, Detlef Schlondorff, Zhihong Liu, Thomas Tuschl, Kyung Lee, John Cijiang He

Research output: Contribution to journalArticlepeer-review

126 Scopus citations

Abstract

Background Recent single-cell RNA sequencing (scRNA-seq) analyses have offered much insight into cell-specific gene expression profiles in normal kidneys. However, in diseased kidneys, understanding of changes in specific cells, particularly glomerular cells, remains limited. Methods To elucidate the glomerular cell–specific gene expression changes in diabetic kidney disease, we performed scRNA-seq analysis of isolated glomerular cells from streptozotocin-induced diabetic endothelial nitric oxide synthase (eNOS)–deficient (eNOS2/2) mice and control eNOS2/2 mice. Results We identified five distinct cell populations, including glomerular endothelial cells, mesangial cells, podocytes, immune cells, and tubular cells. Using scRNA-seq analysis, we confirmed the expression of glomerular cell–specific markers and also identified several new potential markers of glomerular cells. The number of immune cells was significantly higher in diabetic glomeruli compared with control glomeruli, and further cluster analysis showed that these immune cells were predominantly macrophages. Analysis of differential gene expression in endothelial and mesangial cells of diabetic and control mice showed dynamic changes in the pattern of expressed genes, many of which are known to be involved in diabetic kidney disease. Moreover, gene expression analysis showed variable responses of individual cells to diabetic injury. Conclusions Our findings demonstrate the ability of scRNA-seq analysis in isolated glomerular cells from diabetic and control mice to reveal dynamic changes in gene expression in diabetic kidneys, with variable responses of individual cells. Such changes, which might not be apparent in bulk transcriptomic analysis of glomerular cells, may help identify important pathophysiologic factors contributing to the progression of diabetic kidney disease.

Original languageEnglish
Pages (from-to)533-545
Number of pages13
JournalJournal of the American Society of Nephrology : JASN
Volume30
Issue number4
DOIs
StatePublished - Apr 2019

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