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We recently reported that the gut epithelial vitamin D receptor (VDR) signaling inhibits colitis through inhibition of intestinal epithelial cell apoptosis, and the level of colonic epithelial VDR is markedly reduced in patients with inflammatory bowel diseases (IBD). VDR downregulation promotes colitis, but the mechanism underlying VDR downregulation in IBD is unknown.
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Chen et al. (2014) studied this question.
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