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Butyrate regulates the expression of c-Src and focal adhesion kinase and inhibits cell invasion of human colon cancer cells

✍ Scribed by Jenq-Chang Lee; Ming-Chei Maa; Hsiu-Shan Yu; Jung-Hui Wang; Chia-Kuang Yen; Shan-Tair Wang; Yen-Jen Chen; Yuan Liu; Ying-Tai Jin; Tzeng-Horng Leu

Publisher
John Wiley and Sons
Year
2005
Tongue
English
Weight
269 KB
Volume
43
Category
Article
ISSN
0899-1987

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✦ Synopsis

Abstract

Epidemiological studies indicate that dietary fiber‐derived fermentation products such as butyrate can prevent colon cancer development. To further dissect the role of butyrate in anticarcinogenesis, its effect on cellular growth and invasion as well as the expression of c‐Src and FAK, two mutually interactive nonreceptor tyrosine kinases, in three different human colon cancer cell lines (Caco‐2, SW480, and SW620) were investigated. In addition to growth inhibition, butyrate treatment results in a significant downregulation of c‐Src and FAK in human colon cancer cells, which can be attributable to their reduced transcripts and implicates the participation of a butyrate‐sensitive pathway in modulating their expression. Concurrent to butyrate‐reduced c‐Src and FAK expression is the decrease of FAK Tyr‐decrease 397 phosphorylation. Besides, butyrate also abolished the secretion of MMP‐2 and MMP‐9. And these butyrate‐mediated effects severely impaired invasion of SW620 cells through Matrigel in vitro. Interestingly, in situ parallel enhancement of c‐Src and FAK was also observed in human colorectal tumor specimens. These results imply that by virtue of suppression of c‐Src and FAK along with other butyrate targets in colonocytes, butyrate could effectively inhibit tumor growth and invasion. © 2005 Wiley‐Liss, Inc.

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