文献类型：期刊文献

英文题名：Association between Polymorphisms of DNA repair gene XRCC1 and DNA damage in asbestos-exposed workers

作者：Zhao X.-H.[1];Jia G.[2];Liu Y.-Q.[3];Liu S.-W.[1];Yan L.[2];Jin Y.[2];Liu N.[1]

第一作者：赵晓红

通讯作者：Zhao, XH[1]

机构：[1]Beijing Union Univ, Beijing Key Lab Bioact Subst & Funct Foods, Beijing 100083, Peoples R China;[2]Peking Univ, Sch Publ Hlth, Dept Occupat & Environm Hlth Sci, Beijing 100083, Peoples R China;[3]Inst Haidian Hlth Inspect & Supervis, Beijing 100080, Peoples R China

第一机构：北京联合大学应用文理学院|北京联合大学生物化学工程学院

通讯机构：[1]corresponding author), Beijing Union Univ, Beijing Key Lab Bioact Subst & Funct Foods, Beijing 100083, Peoples R China.|[1141726]北京联合大学生物化学工程学院;[11417]北京联合大学;[114172]北京联合大学应用文理学院;

年份：2006

卷号：19

期号：3

起止页码：232-238

外文期刊名：BIOMEDICAL AND ENVIRONMENTAL SCIENCES

收录：;Scopus(收录号：2-s2.0-33747285852);WOS:【SCI-EXPANDED(收录号:WOS:000238694500013)】；

语种：英文

外文关键词：asbestos; asbestosis; DNA damage; XRCC1; DNA repair; polymorphisms; comet assays

摘要：Objective To compare the asbestos-induced DNA damage and repair capacities of DNA damage between 104 asbestos-exposed workers and 101 control workers in Qingdao City of China and to investigate the possible association between polymorphisms in codon 399 of XRCC1 and susceptibility to asbestosis. Methods DNA damage levels in peripheral blood lymphocytes were determined by comet assay, and XRCC1 genetic polymorphisms of DNA samples from 51 asbestosis cases and 53 non-asbestosis workers with a similar asbestos exposure history were analyzed by PCR/RFLP. Results The basal comet scores (3.95 +/- 2.95) were significantly higher in asbestos-exposed workers than in control workers (0.10 +/- 0.28). After 1 h H2O2 stimulation, DNA damage of lymphocytes exhibited different increases. After a 4 h repair period, the comet scores were 50.98 +/- 19.53 in asbestos-exposed workers and 18.32 +/- 12.04 in controls. The residual DNA damage (RD) was significantly greater (P < 0.01) in asbestos-exposed workers (35.62%) than in controls (27.75%). XRCC1 genetic polymorphism in 104 asbestos-exposed workers was not associated with increased risk of asbestosis. But compared with polymorphisms in the DNA repair gene XRCC1 (polymorphisms in codon 399) and the DNA damage induced by asbestos, the comet scores in asbestosis cases with Gln/Gln, Ghr/Arg, and Arg/Arg were 40.26 +/- 18.94, 38.03 +/- 28.22, and 32.0 +/- 11.65, respectively, which were higher than those in non-asbestosis workers with the same genotypes (25.58 +/- 11.08, 37.08 +/- 14.74, and 29.38 +/- 10.15). There were significant differences in the comet scores between asbestosis cases and non-asbestosis workers with Gln/Gln by Student's t-test (P < 0.05 or 0.01). The comet scores were higher in asbestosis workers with Gln/Gln than in those with Arg/Arg and in non-asbestosis workers exposed to asbestos, but without statistically significant difference. Conclusions Exposure to asbestos may be related to DNA damage or the capacity of cells to repair H2O2-induced DNA damage. DNA repair gene XRCC1 codon 399 may be responsible for the inter-individual susceptibility in DNA damage and repair capacities.