Docosahexaenoic acid suppresses arachidonic acid-induced proliferation of LS-174T human colon carcinoma cells

作     者：Piet Habbel Karsten H Weylandt Katja Lichopoj Johannes Nowak Martin Purschke Jing-Dong Wang Cheng-Wei He Daniel C Baumgart Jing X Kang 

作者机构：Department of Medicine Massachusetts General Hospital and Harvard Medical School Boston MA 02114 United States Department of Medicine Division of Gastroenterology and Hepatology Charité Medical Center-Virchow-Hospital Medical School of the Humboldt-University of Berlin 13344 Berlin Germany 

出 版 物：《World Journal of Gastroenterology》 (世界胃肠病学杂志（英文版）)

年 卷 期：2009年第15卷第9期

页      面：1079-1084页

核心收录：

学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学] 

基　　金：Supported by Grants from the German National Academic Foundation (to P.H.) from the American Cancer Society (RSG-03-140-01-CNE) the NIH (NIH R01 113605) (both to J.X.K.) the German Research Foundation (DFG) a Charité Research Grant (both to K.H.W.) 

主　　题：Colorectal carcinoma Colon cancer Omega-3 Omega-6 Polyunsaturated fatty acids Arachidonic acid Docosahexaenoic acid ProstaglandinE2 Cyclooxygenase-2 Apoptosis 

摘      要：AIM： To investigate the impact of arachidonic acid （AA） and docosahexaenoic acid （DHA） and their combination on colon cancer cell growth. METHODS： The LS-174T colon cancer cell line was used to study the role of the prostaglandin precursor AA and the omega-3 polyunsaturated fatty acid DHA on cell growth. Cell viability was assessed in XTT assays. For analysis of cell cycle and cell death, flow cytometry and DAPI staining were applied. Expression of cyclooxygenase-2 （COX-2）, p21 and bcl-2 in ceils incubated with AA or DHA was examined by real-time RT-PCR. Prostaglandin E2 （PGE2） generation in the presence of AA and DHA was measured using a PGE2- ELISA. RESULTS： AA increased cell growth, whereas DHA reduced viability of LS 174T cells in a time- and dosedependent manner. Furthermore, DHA down- regulated mRNA of bcl-2 and up-regulated p21. Interestingly, DHA was able to suppress AA-induced cell proliferation and significantly lowered AA-derived PGE2 formation. DHA also down-regulated COX-2 expression. In addition to the effect on PGE2 formation, DHA directly reduced PGE2-induced cell proliferation in a dosedependent manner. CONCLUSION： These results suggest that DHA can inhibit the pro-proliferative effect of abundant AA or PGE2.