Research article summary (published 13 Nov 2009):

Blockade of TRPC6 channels induced G2/M phase arrest and suppressed growth in human gastric cancer cells.

Full Abstract

Channels formed by the canonical transient receptor potential (TRPC) subfamily of proteins are Ca(2+)-permeable, nonselective cation channels with various functions. Through a phospholipase C (PLC)-dependent mechanism TRPC6, a member of TRPC subfamily, can be activated by receptor tyrosine kinases (RTK) or G protein-coupled receptors (GPCR), which are implicated in cell proliferation and human malignancies. Here, we report that TRPC6 has a critical role in human gastric cancer development. Expression of TRPC6 was greatly upregulated in human gastric cancer epithelial cells compared with that in normal gastric epithelial cells. Treatment of AGS or MKN45 cells, human gastric cancer cell lines, with SKF96365, an agent known to inhibit TRPC channels, arrested cell cycle in G2/M phase and suppressed cell growth. Importantly, expressing a dominant negative mutant of TRPC6 (DNC6) in these cells also arrested cell cycle in G2/M phase and inhibited cell growth. The Ca(2+) elevation in the MKN45 cells evoked by histamine was inhibited by SKF96365 and DNC6. Moreover, inhibition of TRPC6 suppressed the formation of gastric tumors in nude mice. These results suggest that Ca(2+) elevation regulated by TRPC6 channels is essential for G2/M phase transition and for the development of gastric cancers.

Author information

Author/s: Cai, Rong (R); Ding, Xia (X); Zhou, Kechun (K); Shi, Yu (Y); Ge, Ruiliang (R); Ren, Gang (G); Jin, Yening (Y); Wang, Yizheng (Y);

Affiliation: Ruijin Hospital, Department of Radiochemotherapy, Shanghai Jiaotong University Medical School, China.

Journal and publication information

Publication Type: Journal Article; Research Support, Non-U.S. Gov't

Journal: International journal of cancer. Journal international du cancer (Int J Cancer), published in United States. (Language: eng)

Reference: 2009-Nov; vol 125 (issue 10) : pp 2281-7

Dates: Created 2009/09/28; Completed 2009/11/05;

PMID: 19610066, status: MEDLINE (last retrieval date: 11/5/2009, IMS Date: )

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Adenoviridae - genetics Animals Calcium - metabolism Calcium Channel Blockers - pharmacology Cell Division Cell Proliferation Electrophysiology Flow Cytometry G2 Phase Humans Imidazoles - pharmacology

Imidazoles - pharmacology Immunoenzyme Techniques In Situ Hybridization Male Mice Mice, Inbred BALB C Mice, Nude RNA, Messenger - genetics; metabolism Reverse Transcriptase Polymerase Chain Reaction Stomach Neoplasms - pathology; prevention & control TRPC Cation Channels - antagonists & inhibitors; genetics

Associated Chemicals: Calcium Channel Blockers (0) ; Imidazoles (0) ; RNA, Messenger (0) ; TRPC Cation Channels (0) ; TRPC6 protein, human (0) ; Trpc6 protein, mouse (0) ; 1-(2-(3-(4-methoxyphenyl)propoxy)-4-methoxyphenylethyl)-1H-imidazole (130495-35-1) ; Calcium (7440-70-2)

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