Positive Role of CCAAT/Enhancer-Binding Protein Homologous Protein, a Transcription Factor Involved in the Endoplasmic Reticulum Stress Response in the Development of Colitis

被引:101
作者
Namba, Takushi [1 ]
Tanaka, Ken-Ichiro [1 ]
Ito, Yosuke [1 ]
Ishihara, Tolmoaki [1 ]
Hoshino, Tatsuya [1 ]
Gotoh, Tomomi [1 ]
Endo, Motoyoshi [1 ]
Sato, Keizo [1 ]
Mizushima, Tohru [1 ]
机构
[1] Kumamoto Univ, Grad Sch Med & Pharmaceut Sci, Kumamoto 8620973, Japan
基金
日本科学技术振兴机构;
关键词
INFLAMMATORY-BOWEL-DISEASE; DEXTRAN SULFATE SODIUM; NECROSIS-FACTOR-ALPHA; OXIDE-INDUCED APOPTOSIS; PANCREATIC BETA-CELLS; HEAT-SHOCK FACTOR-1; CROHNS-DISEASE; NITRIC-OXIDE; ADHESION MOLECULES; ULCERATIVE-COLITIS;
D O I
10.2353/ajpath.2009.080864
中图分类号
R36 [病理学];
学科分类号
100104 ;
摘要
Although recent reports suggest that the endoplasm ic reticulum (ER) stress response is induced in association with the development of inflammatory bowel disease, its role in the pathogenesis of inflammatory bowel disease remains unclear. The CCAAT/enhancer-binding protein (C/EBP) homologous protein (CHOP) is a transcription factor that is involved in the ER stress response, especially ER stress-induced apoptosis. In this study, we found that experimental colitis was ameliorated in CHOP-null mice, suggesting that CHOP exacerbates the development of colitis. The mRNA expression of Mac-1 (CD11b, a positive regulator of macrophage infiltration), Ero-1 alpha, and Caspase-11 (a positive regulator of interleukin-1 beta production) in the intestine was induced with the development of colitis, and this induction was suppressed in CHOP-null mice. ERO-1 alpha is involved in the production of reactive oxygen species (ROS); an increase in ROS production, which is associated with the development of colitis in the intestine, was suppressed in CHOP-null mice. A greater number of apoptotic cells in the intestinal mucosa of wild-type mice were observed to accompany the development of colitis compared with CHOP-null mice, suggesting that up-regulation of CHOP expression exacerbates the development of colitis. Furthermore, this CHOP activity appears to involve various stimulatory mechanisms, such as macrophage infiltration via the induction of Mac-1, ROS production via the induction of ERO-1 alpha, interleukin-1 beta production via the induction of Caspase-11, and intestinal mucosal cell apoptosis. (Am J Patbol 2009, 174.4786-1796 DOI. 10.2353/ajpath.2009.080864)
引用
收藏
页码:1786 / 1798
页数:13
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