Trans, trans-2,4-decadienal induced cell proliferation via p27 pathway in human bronchial epithelial cells.

doi:10.1016/j.taap.2007.11.028

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Please use this identifier to cite or link to this item: https://ir.csmu.edu.tw:8080/ir/handle/310902500/11628

Title:	Trans, trans-2,4-decadienal induced cell proliferation via p27 pathway in human bronchial epithelial cells.
Authors:	Chang, YC Lin, P
Contributors:	中山醫學大學
Keywords:	tt-DDE;Dienaldehydes;P27;CDK;Cyclin;Rb;Cell proliferation;Human bronchial epithelial cells
Date:	2008
Issue Date:	2015-07-24T09:21:05Z (UTC)
ISSN:	0041-008X
Abstract:	Lung cancer is the leading cause of cancer deaths worldwide. Epidemiological studies have shown that exposure to cooking oil fumes (COF) is a risk factor for lung cancer. Trans, trans-2,4-decadienal (tt-DDE), a dienaldehyde, is abundant in heated oils and COF. Previously, we found that long-term exposure (45 days) to a sub-lethal dose (1 microM) of tt-DDE significantly increased growth of human bronchial epithelial cells (BEAS-2B). Aims of this study are to understand the mechanism of tt-DDE-induced cell proliferation and possible protective effects of antioxidant, vitamin C and N-acetylcysteine (NAC) in BEAS-2B cells. Utilizing the real-time RT-PCR and Western immunoblotting, we found that p27 mRNA and protein levels were significantly increased by 1 microM tt-DDE treatment. Co-treatment with vitamin C or NAC partially prevented tt-DDE-induced cell proliferation. In addition, the downstream targets of p27, including CDK4, cyclin D1 and phosphorylated-Rb proteins, increased in 1 microM tt-DDE-treated cells and these changes were prevented by NAC co-treatment. Therefore, these results suggest that tt-DDE increased cell proliferation via inhibition of p27 expression, increase in CDK4/cyclin D1 protein accumulation and enhancement of Rb phosphorylation. Increased cell proliferation is considered as the early stages of lung carcinogenesis. Administration of antioxidants may prevent COF-associated lung carcinogenesis.
URI:	https://ir.csmu.edu.tw:8080/ir/handle/310902500/11628 http://dx.doi.org/10.1016/j.taap.2007.11.028
Relation:	Toxicol Appl Pharmacol. 2008 Apr 1;228(1):76-83.
Appears in Collections:	[The Institute of Biochemistry, Microbiology and Immunology ] Journal Paper

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