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TTYH2,a human homologue of the Drosophila melanogaster gene tweety,is up-regulated in colon carcinoma and involved in cell proliferation and cell aggregation

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World Journal of Gastroenterology 2007年第19期13卷 2717-2721页

作者： Yuji Toiyama Akira Mizoguchi Kazushi Kimura Junichirou Hiro Yasuhiro Inoue Tomonari Tutumi Chikao Miki Masato Kusunoki Department of Gastrointestinal and Pediatric Surgery Division of Reparative Medicine Institute of Life Sciences Mie University Graduate School of Medicine Japan Department of Anatomy Faculty of Medicine Mie University 2-174 EdobashiTsu Mie 514-8507 Japan

AIM: To investigate the expression patterns of TTYH2 in the human colon cancer and colon cancer cell lines and to evaluate the inhibitory effect of small interfering RNA (siRNA) on the expression of TTYH2 in colon cancer cell ***: We investigated the expression patterns of TTYH2 in colon cancer, adjacent non-tumorous colon mucosa, and cancer cell lines (DLD-1, caco-2, and Lovo) by RT-PCR. Furthermore, a siRNA plasmid expression vector against TTYH2 was constructed and transfected into DLD-1 and Caco-2 with LipofectamineTM 2000. The down regulation of TTYH2 expression was detected by RT-PCR and the role of siRNA in inducing cell proliferation and cell aggregation was evaluated by MTT and aggregation ***: TTYH2 gene expression in colon cancer tissue was significantly up-regulated compared with normal colonic mucosa (1.23 ± 0.404 vs 0.655 ± 0.373, P = 0.0103). Colon cancer derived cell lines including DLD-1, Caco-2, and Lovo also expressed high levels of TTYH2. In contrast, transfection with siRNA-TTYH2 signifi cantly inhibited both proliferation and scattering of these cancer cell ***: The present work demonstrates, for the fi rst time, that the TTYH2 gene expression is signifi cantly up-regulated in colon cancer. The TTYH2 gene may play an important role in regulating both proliferating andmetastatic potentials of colorectal cancer.

关键词： TTYH2 Colorectal carcinoma cell proliferation cell aggregation

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