Background Cigarette-smoke induced DNA damage can cause airway cell apoptosis and death, which may be associated with the development of chronic obstructive pulmonary disease （COPD）. However, only 20%-30% of smokers...Background Cigarette-smoke induced DNA damage can cause airway cell apoptosis and death, which may be associated with the development of chronic obstructive pulmonary disease （COPD）. However, only 20%-30% of smokers develop COPD, suggesting that different degrees of DNA repair produce different outcomes in smokers, i.e., part of them develop COPD. We investigated the association between polymorphisms in DNA repair genes hOGG1 （Ser326Cys） and XRCC1 （Arg399GIn）, alone or in combination, and susceptibility of COPD. Methods Altogether 201 COPD patients and 309 controls were recruited and frequency-matched on age and sex. hOGG1 and XRCC1 genotypes were determined by PCR-restriction fragment length polymorphism analysis. Results The risk of COPD was not significantly different among individuals with Ser/Cys and Cys/Cys genotypes compared with those with hOGG1 Ser/Ser genotype. The risk of COPD was not significantly different among individuals with Gin/Gin genotype compared with those with XRCC1 Arg/Arg genotype, but it was significantly elevated among individuals with Arg/GIn genotype （adjusted odds ratios （OR）=1.55, 95% confidence intervals （CI） 1.05-2.29, P=0.029）. Assessment of smoking status in current smokers compared with those with hOGG1 Ser/Ser genotype revealed that the risk of COPD was significantly elevated among individuals with Cys/Cys genotype （adjusted OR=5.07, 95% CI 1.84-13.95, P=0.002）. Compared with those with XRCC1 Arg/Arg genotype, the risk of COPD was significantly elevated among individuals with Arg/GIn genotype （adjusted OR=2.77, 95% CI 1.52-5.07, P=-0.001）. Assessment of smoking exposure in light smokers compared with those with hOGG1 Ser/Ser genotype showed that the risk of COPD was significantly elevated among individuals with Cys/Cys genotype （adjusted OR=4.02, 95% CI 1.05-16.80, P=0.042）. Compared with those with XRCC1 Arg/Arg genotype, the risk of COPD was significantly elevated among individuals with Gin/Gin genotype （adjusted OR=4.48, 95% CI 1.35-14.展开更多
目的：定量评价胃癌患者X线修复交叉互补基因1（X—ray repair cross—complementing group 1，XRCCl）Arg399Gin多态性与铂类药物化疗敏感性的关系。方法：计算机检索PubMed、EMBASE、CochraneLibrary、中国期刊全文数据库、中国生物...目的：定量评价胃癌患者X线修复交叉互补基因1（X—ray repair cross—complementing group 1，XRCCl）Arg399Gin多态性与铂类药物化疗敏感性的关系。方法：计算机检索PubMed、EMBASE、CochraneLibrary、中国期刊全文数据库、中国生物医学文献数据库、中文科技期刊数据库和万方数据库，收集胃癌患者XRCClArg399Gln多态性与铂类药物化疗敏感性的相关研究。化疗敏感评价指标为临床有效（完全缓解＋部分缓解）率为化疗敏感评价指标。应用RevMan5．2和STATA12．0软件进行统计学分析，计算合并比值比（oddsratio，oR）及95％可信区间（confidence interval，CI）。结果：本研究共纳入8篇文献（1068例）。Meta分析结果显示，各基因型之间（GAVSGG：伽=0．71，95％C7为0．50～1．01；AAVSGG：OR=0．76，95％CI为O．43～1．36；GA＋GGVSAA：oR=1．08，95％C／为0．63～1．86：GA＋AAwGG：OR=0．67，95％C／为0．43～1．05）以及亚洲人群亚组中（GA＋AAwGG：OR=0．64，95％C7为0．35～1．16）XRCClArg399Gln多态性与化疗敏感性差异无统计学意义。按检测方法进行敏感性分析后，结果显示GA＋AA珊GG有统计学意义（OR=0．58，95％CZ为0．40～O．86）；而在亚洲人群亚组中（GA＋AAⅦGG：OR=0．53，95％C7为0.37～0．75）的差异更加显著。结论：XRCClArg399Gln基因多态性可能与胃癌铂类药物化疗耐药相关。展开更多
The DNA damage, caused by cigarette smoking, can cause airway cell apoptosis and death, which may be associated with the development of chronic obstructive pulmonary disease （COPD）. However, just 20%-30% smokers dev...The DNA damage, caused by cigarette smoking, can cause airway cell apoptosis and death, which may be associated with the development of chronic obstructive pulmonary disease （COPD）. However, just 20%-30% smokers develop COPD, which suggests that different degrees of DNA repair cause different outcomes in smokers. X-ray repair cross-complementing group 1 （XRCC 1）, a base excision repair protein, has multiple roles in repairing ROS-mediated, basal DNA damage and single-strand DNA breaks. The present study investigated the association between polymorphism in XRCC1 （Arg399Gln） and susceptibility of COPD. A total of 201 COPD cases and 309 controls were recruited and frequency-matched on age and sex. XRCC1 genotype was determined by PCR-restriction fragment length polymorphism analysis. Overall, compared with those with the XRCC1 Arg/Arg genotype, the risk for COPD had no significant difference among individuals with Trp/Trp genotype. However, after stratifying by smoking status, in former smokers, compared with those with the XRCC1 Arg/Arg genotype, the risk for COPD was significantly reduced among individuals with Trp/Trp genotype （adjusted OR=0.22, 95% CI 0.06-0.85, P=0.028）; after stratifying by smoking exposure, in light smokers, compared with those with the XRCC1 Arg/Arg genotype, the risk for COPD was significantly reduced among individuals with Arg/Trp genotype and Trp/Trp genotype （adjusted OR=0.39, 95% CI 0.16=0.94, P=0.036; 0.24, 95% CI 0.07-0.79, P=0.019, respectively）. In conclusion, XRCC1 Arg194Trp genotype is associated with a reduced risk of developing COPD among former and light smokers.展开更多
Objective： To estimate the relationship between genetic polymorphisms of X-ray repair cross- complementing group 1 （XRCC1） and the susceptibility to childhood acute lymphoblastic leukemia （ALL）. Methods： Relevan...Objective： To estimate the relationship between genetic polymorphisms of X-ray repair cross- complementing group 1 （XRCC1） and the susceptibility to childhood acute lymphoblastic leukemia （ALL）. Methods： Relevant case-control studies were enrolled in the meta-analysis. We applied Rev Man 4.2 software to pool raw data and test studies＇ heterogeneity and to calculate the incorporated odds ratio （OR） and 95% confidence interval （95% CI）. Results： Our data showed that the OR for the Gln allele of the Arg399Gln polymorphism, compared with the Arg allele, was 1.35 （95% CI, 1.16-1.57; P〈0.0001） for childhood ALL patients. Similarly, the homozygous genotype Gln/Gln and heterozygous genotype Arg/Gln both significantly increased the risk of childhood ALL compared with the wild genotype Arg/Arg （OR =1.58; 95% CI, 1.13-2.21; P=0.008; OR =1.51; 95% CI, 1.21-1.87; P=0.0002）. The dominant model of Arg399Gln was associated with childhood ALL risk （OR =1.54; 95% CI, 1.25-1.89; P〈0.0001）. The ethnic subgroup analysis demonstrated that the Gln allele in all five ethnic groups was prone to be a risk factor for childhood ALL just with different degrees of correlation while Arg194Trp SNP showed a protective or risk factor or irrelevant thing in different races. Conclusions： XRCC1 399 polymorphism may increase the risk of childhood ALL. Different ethnic groups with some gene polymorphism have different disease risks.展开更多
基金This study was supported by a grant from the National Natural Science Foundation of China （No. 30570794）.
文摘Background Cigarette-smoke induced DNA damage can cause airway cell apoptosis and death, which may be associated with the development of chronic obstructive pulmonary disease （COPD）. However, only 20%-30% of smokers develop COPD, suggesting that different degrees of DNA repair produce different outcomes in smokers, i.e., part of them develop COPD. We investigated the association between polymorphisms in DNA repair genes hOGG1 （Ser326Cys） and XRCC1 （Arg399GIn）, alone or in combination, and susceptibility of COPD. Methods Altogether 201 COPD patients and 309 controls were recruited and frequency-matched on age and sex. hOGG1 and XRCC1 genotypes were determined by PCR-restriction fragment length polymorphism analysis. Results The risk of COPD was not significantly different among individuals with Ser/Cys and Cys/Cys genotypes compared with those with hOGG1 Ser/Ser genotype. The risk of COPD was not significantly different among individuals with Gin/Gin genotype compared with those with XRCC1 Arg/Arg genotype, but it was significantly elevated among individuals with Arg/GIn genotype （adjusted odds ratios （OR）=1.55, 95% confidence intervals （CI） 1.05-2.29, P=0.029）. Assessment of smoking status in current smokers compared with those with hOGG1 Ser/Ser genotype revealed that the risk of COPD was significantly elevated among individuals with Cys/Cys genotype （adjusted OR=5.07, 95% CI 1.84-13.95, P=0.002）. Compared with those with XRCC1 Arg/Arg genotype, the risk of COPD was significantly elevated among individuals with Arg/GIn genotype （adjusted OR=2.77, 95% CI 1.52-5.07, P=-0.001）. Assessment of smoking exposure in light smokers compared with those with hOGG1 Ser/Ser genotype showed that the risk of COPD was significantly elevated among individuals with Cys/Cys genotype （adjusted OR=4.02, 95% CI 1.05-16.80, P=0.042）. Compared with those with XRCC1 Arg/Arg genotype, the risk of COPD was significantly elevated among individuals with Gin/Gin genotype （adjusted OR=4.48, 95% CI 1.35-14.
基金supported by a grant from National Natural Science Foundation of China (No.30570794)
文摘The DNA damage, caused by cigarette smoking, can cause airway cell apoptosis and death, which may be associated with the development of chronic obstructive pulmonary disease （COPD）. However, just 20%-30% smokers develop COPD, which suggests that different degrees of DNA repair cause different outcomes in smokers. X-ray repair cross-complementing group 1 （XRCC 1）, a base excision repair protein, has multiple roles in repairing ROS-mediated, basal DNA damage and single-strand DNA breaks. The present study investigated the association between polymorphism in XRCC1 （Arg399Gln） and susceptibility of COPD. A total of 201 COPD cases and 309 controls were recruited and frequency-matched on age and sex. XRCC1 genotype was determined by PCR-restriction fragment length polymorphism analysis. Overall, compared with those with the XRCC1 Arg/Arg genotype, the risk for COPD had no significant difference among individuals with Trp/Trp genotype. However, after stratifying by smoking status, in former smokers, compared with those with the XRCC1 Arg/Arg genotype, the risk for COPD was significantly reduced among individuals with Trp/Trp genotype （adjusted OR=0.22, 95% CI 0.06-0.85, P=0.028）; after stratifying by smoking exposure, in light smokers, compared with those with the XRCC1 Arg/Arg genotype, the risk for COPD was significantly reduced among individuals with Arg/Trp genotype and Trp/Trp genotype （adjusted OR=0.39, 95% CI 0.16=0.94, P=0.036; 0.24, 95% CI 0.07-0.79, P=0.019, respectively）. In conclusion, XRCC1 Arg194Trp genotype is associated with a reduced risk of developing COPD among former and light smokers.
文摘Objective： To estimate the relationship between genetic polymorphisms of X-ray repair cross- complementing group 1 （XRCC1） and the susceptibility to childhood acute lymphoblastic leukemia （ALL）. Methods： Relevant case-control studies were enrolled in the meta-analysis. We applied Rev Man 4.2 software to pool raw data and test studies＇ heterogeneity and to calculate the incorporated odds ratio （OR） and 95% confidence interval （95% CI）. Results： Our data showed that the OR for the Gln allele of the Arg399Gln polymorphism, compared with the Arg allele, was 1.35 （95% CI, 1.16-1.57; P〈0.0001） for childhood ALL patients. Similarly, the homozygous genotype Gln/Gln and heterozygous genotype Arg/Gln both significantly increased the risk of childhood ALL compared with the wild genotype Arg/Arg （OR =1.58; 95% CI, 1.13-2.21; P=0.008; OR =1.51; 95% CI, 1.21-1.87; P=0.0002）. The dominant model of Arg399Gln was associated with childhood ALL risk （OR =1.54; 95% CI, 1.25-1.89; P〈0.0001）. The ethnic subgroup analysis demonstrated that the Gln allele in all five ethnic groups was prone to be a risk factor for childhood ALL just with different degrees of correlation while Arg194Trp SNP showed a protective or risk factor or irrelevant thing in different races. Conclusions： XRCC1 399 polymorphism may increase the risk of childhood ALL. Different ethnic groups with some gene polymorphism have different disease risks.
