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http://dx.doi.org/10.4196/kjpp.2012.16.3.153

Ethanol Elicits Inhibitory Effect on the Growth and Proliferation of Tongue Carcinoma Cells by Inducing Cell Cycle Arrest  

Le, Thanh-Do (Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chosun University)
Do, Thi Anh Thu (Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chosun University)
Yu, Ri-Na (Department of Food Science and Nutrition, University of Ulsan)
Yoo, Hoon (Department of Pharmacology and Dental Therapeutics, School of Dentistry, Chosun University)
Publication Information
The Korean Journal of Physiology and Pharmacology / v.16, no.3, 2012 , pp. 153-158 More about this Journal
Abstract
Cellular effects of ethanol in YD-15 tongue carcinoma cells were assessed by MTT assay, caspase activity assay, Western blotting and flow cytometry. Ethanol inhibited the growth and proliferation of YD-15 cells in a dose- and time-dependent manner in an MTT assay. The effects of ethanol on cell cycle control at low percent range of ethanol concentration (0 to 1.5%), the condition not inducing YD-15 cell death, was investigated after exposing cells to alcohol for a certain period of time. Western blotting on the expression of cell cycle inhibitors showed that p21 and p27 was up-regulated as ethanol concentration increases from 0 to 1.5% whilst the cell cycle regulators, cdk1, cdk2, and cdk4 as well as Cyclin A, Cyclin B1 and Cyclin E1, were gradually down-regulated. Flow cytometric analysis of cell cycle distribution revealed that YD-15 cells exposed to 1.5% ethanol for 24 h was mainly arrested at G2/M phase. However, ethanol induced apoptosis in YD-15 cells exposed to 2.5% or higher percent of ethanol. The cleaved PARP, a marker of caspase-3 mediated apoptosis, and the activation of caspase-3 and -7 were detected by caspase activity assay or Western blotting. Our results suggest that ethanol elicits inhibitory effect on the growth and proliferation of YD-15 tongue carcinoma cells by mediating cell cycle arrest at G2/M at low concentration range and ultimately induces apoptosis under the condition of high concentration.
Keywords
Cell cycle arrest; Cell growth; Ethanol; Tongue carcinoma cell;
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