Effect of light and dark dosing time on biological response to environmental chemicals in mice

点击翻译按钮获取中文摘要

Any differences in the frequencies of micronucleus induction in peripheral blood reticulocytes(MNRETs) of mice exposed to BaP between light and dark dosing times were not observed. However, the expression of lipid metabolism related genes such as Fasn in liver was dramatically increased in treatment group at ZT15(darkphase). On the other hand, MNRETs of mice treated with ENU at ZT15 were significantly higher than those in mice treated at ZT3 (light phase). The expression of p53-responsible genes such as Cyclin G1 in the bone marrow cells was higher in treatment group at ZT3 than that at ZT15. DNA repair might be promoted at light phase. These results suggest that toxic sensitivity to chemicals is different between the light and dark phase.