Genotoxicity evaluation of carbon monoxide and 1,3-butadiene using a new joint technology: the in vitro γH2AX HCS assay combined with air-liquid interface system

Toxicology Mechanisms and Methods
Sen ZhangQingyuan Hu

Abstract

To investigate the genotoxicity of gaseous toxicants carbon monoxide (CO) and 1,3-butadiene in vitro, a novel combination technology-the in vitro γH2AX high content screening assay combined with air-liquid interface system (ALIS) was established. The results showed that this new technology was available and effective. Based on the joint technology, genotoxicity of CO and 1,3-butadiene was evaluated further in this study. The results showed that treatment concentrations (0, 20%,40%, 80% and 100%, v/v) and exposure time (15, 30, 45, 60 and 90 min) of CO both had no statistically significant effects on the induction of γH2AX (p > 0.05). However, 1,3-butadiene can induce significant γH2AX (p < 0.01) in A549 cells in a dose/time-dependent manner both in the absence and presence of rat liver S9. When the concentrations of 1,3-butadiene were more than 80%, a higher γH2AX level could be induced than the 1.5-fold of vehicle controls after 1 h of treatment. Overall, this new technology can be used as a complementary tool to evaluate the genotoxicity of air-borne toxicants in vitro based on the in vitro γH2AX high content screening assay combined with ALIS. Based on the joint technology, CO was not genotoxic in A549 cells, while 1,3-butad...Continue Reading

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