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

Toxicology and Applied Pharmacology
Yun-Ching Chang, Pinpin Lin

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...Continue Reading

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Jun 9, 2012·Journal of Immigrant and Minority Health·Trevor Lee, Francesca Gany
Jul 30, 2010·International Journal of Cancer. Journal International Du Cancer·Rajasubramaniam ShanmugamChristopher J Sweeney
Oct 27, 2016·Journal of Hazardous Materials·Chiung-Yu PengYi-Chun Kuo
Sep 20, 2017·Critical Reviews in Food Science and Nutrition·Kumar GanesanBaojun Xu
Feb 22, 2012·Molecular and Cellular Biochemistry·Natalie A ChapadosPascal Imbeault
Jul 12, 2020·Toxicology in Vitro : an International Journal Published in Association with BIBRA·Chenxi YanKe Yao
Jul 2, 2021·Ecotoxicology and Environmental Safety·Linjing DengQihong Deng

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