炎症
癌变
癌症研究
结肠炎
癌症
生物
免疫学
ErbB公司
炎症体
信号转导
结直肠癌
大肠癌小鼠模型的建立
医学
细胞生物学
内科学
作者
Yasmín Hernández,John P. Sotolongo,Masayuki Fukata
出处
期刊:Cancers
[MDPI AG]
日期:2011-08-02
卷期号:3 (3): 3104-3113
被引量:7
标识
DOI:10.3390/cancers3033104
摘要
Chronic inflammation has long been implicated as a predisposition for cancer, but the underlying mechanism for how this occurs has remained obscure. Ulcerative colitis (UC) is a chronic inflammatory disorder of the large intestine which is known to be highly linked to colorectal cancer. During chronic inflammation the intestinal mucosa is in a constant cycle of injury and repair resulting in aberrant epithelial proliferation, a process that increases the risk of neoplastic transformation. In particular, the coexistence of commensal flora in the intestine plays an important role in the regulation of mucosal restitution after epithelial injury. It has become apparent that signaling through toll-like receptors (TLRs), the receptor family recognizing pathogen-associated molecular patterns, is crucial to intestinal epithelial proliferation and mucosal restitution. We have recently described two important downstream pathways underlying TLR4-mediated epithelial proliferation in a mouse model of colitis-associated cancer; i.e., cyclooxygenase 2 (COX-2)-mediated production of prostaglandin E2 (PGE2), and induction of specific ligands for epidermal growth factor receptor (EGFR). These two pathways are closely involved with mucosal levels of PGE2 and other prostanoids such as 15-deoxy-delta 12,14-prostaglandin-J2 (15d-PGJ2). Understanding the fine interplay between the TLR signaling and intestinal tumorigenesis in the setting of chronic inflammation can contribute to establishing a novel treatment strategy for inflammation-associated cancers.
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