作者: Shinichiro Zushi , Yasuhisa Shinomura , Tatsuya Kiyohara , Yoshiji Miyazaki , Shusaku Tsutsui
DOI: 10.1002/(SICI)1097-0215(19971210)73:6<917::AID-IJC26>3.0.CO;2-#
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摘要: The ras mutation is a common and critical step in carcinogenesis. Autocrine growth factors are also known to play an important role cancer cell transformation. However, the contribution of autocrine regulation proliferation apoptosis activated ras-stimulated intestinal epithelium not fully understood. Therefore, we constructed ras-transfected epithelial clones (IEC-ras) examine epidermal factor (EGF)-related peptides behavior IEC-ras. Overexpression EGF family (transforming alpha, heparin-binding EGF-like factor, amphiregulin betacellulin) stronger phosphorylation receptor was observed IEC-ras compared with control cells. proliferated more rapidly than cells, specific kinase inhibitor, AG 1478, abolished increased Heparitinase chlorate prevented Additionally, expressed bcl-2 resistant induction by UV radiation mitomycin C. 1478 suppressed expression inhibited resistance had effects similar those 1478. Our data indicate that both