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KMID : 0624620080410100733
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BMB Reports
2008 Volume.41 No. 10 p.733 ~ p.738
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TC1 (C8orf4) is involved in ERK1/2 pathway-regulated G1- to S-phase transition
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Wang Yi-Dong
Bian Guo-Hui
Lv Xiao-Yan
Zheng Rong
Sun Huan
Zhang Zheng
Chen Ye
Li Qin-Wei
Xiao Yan
Ai Jian-Zhong
Wei Yu-Quan
Zhou Qin
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Abstract
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Although previous studies have implicated a role for TC1 (C8orf4) in cancer cell proliferation, the molecular mechanism of its action is still largely unclear. In this study, we showed, for the first time, that the mRNA levels of TC1 were upregulated by mitogens (FBS/thrombin) and at least partially, through the ERK1/2 signaling pathway. Interestingly, the over-expression of TC1 promoted the G1- to S-phase transition of the cell cycle, which was delayed by the deficiency of ERK1/2 signaling in fibroblast cells. Furthermore, the luciferase reporter assay indicated that the over-expression of TC1 significantly increased Cyclin D1 promoter-driven luciferase activity. Taken together, our findings revealed that TC1 was involved in the mitogen-activated ERK1/2 signaling pathway and positively regulated G1- to S-phase transition of the cell cycle. Our results may provide a novel mechanism of the role of TC1 in the regulation of cell proliferation.
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KEYWORD
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Cell proliferation, Cyclin D1, ERK1/2 signaling pathway, G1- to S-phase transition, TC1 (C8orf4)
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