臨牀消化器内科 Vol.23 No.12(4-1)


特集名 消化器癌化学予防の現状
題名 大腸癌化学予防 (1) 動物モデルを用いた基礎的研究の現状
発刊年月 2008年 11月
著者 田中 卓二 金沢医科大学腫瘍病理学
著者 安井 由美子 金沢医科大学腫瘍病理学
【 要旨 】 癌化学予防は癌対策のなかで,重要かつ魅力的な癌対策戦略の一つである.近年,大腸癌発症に背景粘膜の炎症や肥満が関わることが指摘されており,大腸癌の化学予防に新たな戦略が必要となってきた.そのため,新規に作出された動物モデルや遺伝子改変マウスなどを用いた前臨床試験研究が盛んになっている.このような基礎研究で,新たな大腸発癌阻止・遅延のための標的が提唱されている.本稿では,動物モデルを用いた最近の成果を概説して,臨床の現場へ反映する基礎的試料としたい.
Theme Present Status of Chemoprevention for Tumors Derived from Digestive Diseases
Title Preclinical Animal Studies on Chemoprevention of Colorectal Cancer
Author Takuji Tanaka Department of Oncologic Pathology, Kanazawa Medical University
Author Yumiko Yasui Department of Oncologic Pathology, Kanazawa Medical University
[ Summary ] Recently, prevention of cancer through synthetic chemicals or dietary intervention has received increasing interest. The fact that inflammation and obesity are risk factors for colorectal cancer (CRC) development led us to investigate whether several compounds that can affect inflammation and obesity-related serum levels or enzymatic alterations involving tumorigenesis are able to inhibit colon carcinogenesis, as seen using different animal models. These agents have been demonstrated to act on multiple key elements in signal transduction pathways related to cellular proliferation, differentiation, apoptosis, inflammation, and obesity. However, these molecular mechanisms of action need to be characterized and elucidated. These preclinical findings have revealed novel molecular pharmacological targets for chemoprevention of CRC in patients with inflamed colons, obese populations, and FAP patients. In this short review, recent findings regarding this aspect are summarized and the need for novel chemopreventive approaches for prevention in high-risk CRC populations is highlighted.
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