title: Octreotide inhibits growth of colonic cancer SW480 cells by modulating the Wnt/P-catenin pathway.
abstract: Somatostatin can suppress the growth of various tumor cells including colonic cancer. Activated Wnt/ beta-catenin signaling pathway plays a critical role in tumorgenesis and development of colorectal cancer. However, the effect of somatostatin on Wnt/beta-catenin signaling pathway remains unknown. Thus, we investigated the effect of octreotide on Wnt/beta-catenin signaling pathway in human colonic cancer cell SW480. The results of 3-(4,5-imethyl thiazol-2-yl)-2, 5-diphenyl tetrazolium bromide (MTT) and flow cytometric assays showed that octreotide inhibited growth, induced apoptosis and arrested the G1 cell cycle of SW480 cells in a dose-dependent manner. We demonstrated that octreotide significally up-regulated and down-regulated 13 genes and 17 genes in Wnt/beta-catenin signaling using microarray, respectively. Furthermore, as evidenced by western blot, beta-catenin protein level decreased, whereas phosphorylated beta-catenin protein level increased under octreotide. The present study reveals that octreotide can inhibit human colonic cancer cell growth through inhibition of Wnt/beta-catenin signaling pathway.
authors.affiliation: Department of Oncology, Affiliated Nanhua Hospital, University of South China, Hunan Province, PR China.
authors.forename: Jing-Song
authors.initials: JS
authors.lastname: Chen
authors.forename: Qing-Mo
authors.initials: QM
authors.lastname: Liang
authors.forename: Hua-Shu
authors.initials: HS
authors.lastname: Li
authors.forename: Jie
authors.initials: J
authors.lastname: Yang
authors.forename: Song
authors.initials: S
authors.lastname: Wang
authors.forename: Jian-Wu
authors.initials: JW
authors.lastname: Long