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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Biol+Chem
2015 ; 290
(24
): 15327-36
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The Endoplasmic Reticulum Stress Sensor IRE1? in Intestinal Epithelial Cells Is
Essential for Protecting against Colitis
#MMPMID25925952
Zhang HS
; Chen Y
; Fan L
; Xi QL
; Wu GH
; Li XX
; Yuan TL
; He SQ
; Yu Y
; Shao ML
; Liu Y
; Bai CG
; Ling ZQ
; Li M
; Liu Y
; Fang J
J Biol Chem
2015[Jun]; 290
(24
): 15327-36
PMID25925952
show ga
Intestinal epithelial cells (IECs) have critical roles in maintaining homeostasis
of intestinal epithelium. Endoplasmic reticulum (ER) stress is implicated in
intestinal epithelium homeostasis and inflammatory bowel disease; however, it
remains elusive whether IRE1?, a major sensor of ER stress, is directly involved
in these processes. We demonstrate here that genetic ablation of Ire1? in IECs
leads to spontaneous colitis in mice. Deletion of IRE1? in IECs results in loss
of goblet cells and failure of intestinal epithelial barrier function. IRE1?
deficiency induces cell apoptosis through induction of CHOP, the pro-apoptotic
protein, and sensitizes cells to lipopolysaccharide, an endotoxin from bacteria.
IRE1? deficiency confers upon mice higher susceptibility to chemical-induced
colitis. These results suggest that IRE1? functions to maintain the intestinal
epithelial homeostasis and plays an important role in defending against
inflammation bowel diseases.