Gene expression profile and cytotoxicity of human bronchial epithelial cells exposed to crotonaldehyde.
Crotonaldehyde is an environment pollutant and lipid peroxidation product. Crotonaldehyde produces adverse effects to humans and serves as a risk factor for human pulmonary diseases. Like acrolein and 4-hydroxynonenal, crotonaldehyde seems likely to alter many cell signaling cascades, including inflammatory responses. The purpose of this study was to investigate the genome-wide transcriptional responses of normal human bronchial epithelial cells exposed to crotonaldehyde. Using microarrays technology, the global changes in transcriptional level were analyzed. Prior to RNA extraction, cells were exposed to crotonaldehyde at 40 or 80 microM for 3 or 6h. Real-time quantitative polymerase chain reaction (qPCR) was performed to validate microarray data and cell cycle arrest was determined. The commonly differentially regulated genes in many biological processes were dysregulated including inflammatory responses, exogenous metabolism, cell cycle, heat shock responses, and antioxidant responses. Results in the present study screen out the important roles of HMOX1 in regulating other signaling cascades and ALDH1A3 in detoxifying exogenous toxicants. Collectively, our study demonstrated that crotonaldehyde altered gene expression profile in the genome-wide transcriptional level in normal human bronchial epithelial cells. And many of them represented potential mechanisms of crotonaldehyde causing cytotoxicity and tissue injury in the human lung.
Liu
Xing-Yu
XY
Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, Liaoning 116023, PR China.
Yang
Zhi-Hua
ZH
Pan
Xiu-Jie
XJ
Zhu
Mao-Xiang
MX
Xie
Jian-Ping
JP
D000447:Aldehydes / Q000633:toxicity*; D002460:Cell Line; D002470:Cell Survival / Q000187:drug effects; D004305:Dose-Response Relationship, Drug; D004847:Epithelial Cells / Q000187:drug effects*; D020869:Gene Expression Profiling; D005786:Gene Expression Regulation / Q000187:drug effects*; D015894:Genome, Human; D006801:Humans; D020545:Respiratory Mucosa / Q000166:cytology*
D000447:Aldehydes; C012796:2-butenal