Induction of DNA damage signaling genes in benzidine-treated HepG2 cells

Ssu Ching Chen, You Cheng Hseu, Jia Chuen Sung, Chin Hui Chen, Lei Chin Chen, King Tom Chung

研究成果: 雜誌貢獻期刊論文同行評審

11 引文 斯高帕斯(Scopus)

摘要

We examined genotoxicity and DNA damage response in HepG2 cells following exposure to benzidine. Using the Comet assay, we showed that benzidine (50-200 μM) induces DNA damage in HepG2 cells. DNA damage signaling pathway-based PCR arrays were used to investigate expression changes in genes involved in cell-cycle arrest, apoptosis, and DNA repair and showed upregulation of 23 genes and downregulation of one gene in benzidine-treated cells. Induction of G2/M arrest and apoptosis was confirmed at the protein level. Real-time PCR and Western blots were used to demonstrate the expression of select DNA repair-associated genes from the PCR array. Upregulation of the p53 protein in benzidine-treated cells suggests the induction of the p53 DNA damage signaling pathway. Collectively, DNA damage response genes induced by benzidine indicate recruitment complex molecular machinery involved in DNA repair, cell-cycle arrest, and potentially, activation of the apoptosis.

原文???core.languages.en_GB???
頁(從 - 到)664-672
頁數9
期刊Environmental and Molecular Mutagenesis
52
發行號8
DOIs
出版狀態已出版 - 10月 2011

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