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  • CD47 is a negative regulator of intestinal epithelial cell self-renewal following DSS-induced experimental colitis.

CD47 is a negative regulator of intestinal epithelial cell self-renewal following DSS-induced experimental colitis.

Scientific reports (2020-06-25)
Yueqin He, Xinlei Sun, Weiwei Rong, Rong Yang, Hongwei Liang, Ying Qi, Limin Li, Ke Zen
ABSTRACT

CD47 deficient mice are resistant to dextran sulfate sodium (DSS)-induced experimental colitis. The underlying mechanism, however, remains incompletely understood. In this study, we characterized the role of CD47 in modulating homeostasis of gastrointestinal tract. We found that CD47 expression in both human and mouse intestinal epithelium was upregulated in colitic condition compared to that under normal condition. In line with this, CD47 deficiency protected mice from DSS-induced colitis. Analysis based on both intestinal organoid and cultured cell assays showed that CD47 deficiency accelerated intestinal epithelial cell proliferation and migration. Mechanistically, western blot and functional assays indicated that CD47 deficiency promoting mouse intestinal epithelial cell proliferation and migration follow cell injury is likely through upregulating expression of four Yamanaka transcriptional factors Oct4, Sox2, Klf4 and c-Myc (OSKM in abbreviation). Our studies thus reveal CD47 as a negative regulator in intestinal epithelial cell renewal during colitis through downregulating OSKM transcriptional factors.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Dextran sulfate sodium salt, Mr ~40,000
Sigma-Aldrich
Glycogen Phosphorylase Inhibitor, The Glycogen Phosphorylase Inhibitor, also referenced under CAS 648926-15-2, controls the biological activity of Glycogen Phosphorylase.