title: Studying the impact of S9 on cyto-genotoxicity of cigarette smoke in human peripheral blood lymphocytes in vitro.
abstract: In present study, human lymphocytes were exposed to cigarette smoke condensates (CSCs) at the doses of 25, 50, 75, 100 and 125 μg ml(-1) with and without S9, and the cyto-genotoxic effects were detected with CCK-8, cell apoptosis and micronucleus assays. DNA repair kinetics was observed with comet assay. Our results indicated that the cell viability decreased with CSCs doses, the percentages of apoptosis cell and the frequencies of micronuclei increased with CSCs doses, and DNA damage of human lymphocytes induced by CSCs could be basically repaired within 240 min. However, the cytotoxicity induced by CSCs +S9 was significantly lower than that induced by CSCs -S9 in CCK-8 and cell apoptosis assays, and the DNA repair speed in +S9 group was quicker than that in -S9 group. In conclusion, S9 may affect not only the cyto-genotoxicity of CSCs but also the repair process of DNA damage induced by CSCs in lymphocytes.
authors.affiliation: Zhejiang University, The Second Affiliated Hospital of Medical College, Institute of Oncology, Hangzhou 310002, Zhejiang, People's Republic of China.
authors.forename: Lou
authors.initials: L
authors.lastname: Jianlin
authors.forename: Chu
authors.initials: C
authors.lastname: Guohai
authors.forename: Zhou
authors.initials: Z
authors.lastname: Guojun
authors.forename: Jiang
authors.initials: J
authors.lastname: Jian
authors.forename: Huang
authors.initials: H
authors.lastname: Fangfang
authors.forename: Xu
authors.initials: X
authors.lastname: Juanjuan
authors.forename: Zheng
authors.initials: Z
authors.lastname: Shu
authors.forename: Chen
authors.initials: C
authors.lastname: Zhijian
authors.forename: Jiang
authors.initials: J
authors.lastname: Wei
authors.forename: Lu
authors.initials: L
authors.lastname: Yezhen
authors.forename: Li
authors.initials: L
authors.lastname: Xiaoxue
authors.forename: He
authors.initials: H
authors.lastname: Jiliang