Background: The purpose of this study was to evaluate the association among serum organochlorine pesticide residues, glutathione S-transferase M1 genetic polymorphism and female breast cancer. Methods: A 1:1 matched c...Background: The purpose of this study was to evaluate the association among serum organochlorine pesticide residues, glutathione S-transferase M1 genetic polymorphism and female breast cancer. Methods: A 1:1 matched case-control study of 140 newly diagnosed breast cancer patients and 140 non-cancer female patients who consulted the five largest hospitals in the Tangshan city from September 2006 to October 2007. Results: The result showed higher risk of breast cancer among subjects with higher levels of serum DDT and HCH residue, the OR was 3.18 (95%CI, 1.11 - 9.07) and 5.02 (95%CI, 1.64 - 16.56).The value of ORe associated with single environmental factor DDT high residues, and ORg associated with single GSTM1 deletion genotype were respectively 3.86 (1.20 - 12.47) and 1.34 (0.36 - 5.08). The OReg associated with combined action of two factors was 5.59 (1.63 - 18.90), and the value of interaction parameters (γ) equaled 1.24. The value of ORe associated with single environmental factor HCH higher residue and ORg associated with single GSTM1 deletion genotype were respectively 2.73 (0.84 - 8.87) and 1.48 (0.49 - 4.60). The value of OReg associated with combined action of two factors was 3.87 (1.18 - 12.68), and γ equaled 1.38. Conclusion: The results indicated that breast cancer occurrence was the combined result of environmental and genetic factors. The concurrent action of GSTM1 deletion genotype and DDT/HCH enhanced the risk of breast cancer.展开更多
Objective:To evaluate the predictive values of gene expressions of ribonucleotide reductase M1(RRM1) and breast cancer susceptibility gene 1(BRCA1) in peripheral blood from Chinese patients with non-small-cell lung ca...Objective:To evaluate the predictive values of gene expressions of ribonucleotide reductase M1(RRM1) and breast cancer susceptibility gene 1(BRCA1) in peripheral blood from Chinese patients with non-small-cell lung cancer(NSCLC) treated with gemcitabine plus platinum.Methods:Forty Chinese patients with advanced NSCLC were recruited and received gemcitabine 1200 mg/m 2 on Days 1 and 8 plus carboplatin AUC 5 on Day 1.RRM1 and BRCA1 expression levels in peripheral blood were detected by quantitative reverse transcription-polymerase chain reaction(RT-PCR) .Kaplan-Meier survival curve and log-rank test were performed to evaluate the correlation between gene expression and overall survival for these subjects.Results:No correlation was observed between gene expression of RRM1 and that of BRCA1(P>0.05) ,but there was a strong correlation between the expression of RRM1 and the response to chemotherapy(P=0.003) .Subjects with low RRM1 expression levels in peripheral blood had longer sur-vival time than those with high RRM1 expression levels(16.95 vs.12.76 months,log-rank 3.989,P=0.046) .However,no significant association between BRCA1 expression levels and survival time was found(16.80 vs.13.77 months,log-rank 0.830,P=0.362) .Conclusions:Patients with low RRM1 expression levels in peripheral blood have a greater response to chemotherapy and longer survival time.Advanced NSCLC patients with low RRM1 expression levels may benefit from gemcitabine plus platinum therapy.RRM1 mRNA expression in peripheral blood could be used to predict the prognosis of NSCLC treated by gemcitabine and platinum.展开更多
目的通过筛查GSTM1基因SNPs位点,研究该基因编码区单核苷酸多态位点T1270533G与鼻咽癌易感性和临床表型的关系。方法用PCR方法对中国人群27个个体DNA标本进行扩增、纯化及测序,从中获得GSTM1编码区、调控区和侧翼区及部分内含子区SNP位...目的通过筛查GSTM1基因SNPs位点,研究该基因编码区单核苷酸多态位点T1270533G与鼻咽癌易感性和临床表型的关系。方法用PCR方法对中国人群27个个体DNA标本进行扩增、纯化及测序,从中获得GSTM1编码区、调控区和侧翼区及部分内含子区SNP位点,所获数据进行LD分析。选择编码区多态性位点T1270533G(该位点在中国人群罕见等位基因频率为22.2%),用tetra-Primer ARMS-PCR结合测序方法对鼻咽癌患者和对照人群进行相关性分析。结果通过测序共获取29个SNPs;其中13个SNPs位点之间均呈高度连锁不平衡;编码区多态性位点T1270533G的变异与鼻咽癌临床表型之间无明显关联(RR=0.170,95%CI=0.95-0.306 for homozygoteTT)。结论编码区多态位点T1270533G虽然发生了碱基顛换,产生了错义突变,导致了氨基酸的改变,但并没有影响其解毒功能。该位点在鼻咽癌患者和对照人群中等位基因型频率差别很小,与中国广东地区鼻咽癌易感性无明显关联。展开更多
文摘Background: The purpose of this study was to evaluate the association among serum organochlorine pesticide residues, glutathione S-transferase M1 genetic polymorphism and female breast cancer. Methods: A 1:1 matched case-control study of 140 newly diagnosed breast cancer patients and 140 non-cancer female patients who consulted the five largest hospitals in the Tangshan city from September 2006 to October 2007. Results: The result showed higher risk of breast cancer among subjects with higher levels of serum DDT and HCH residue, the OR was 3.18 (95%CI, 1.11 - 9.07) and 5.02 (95%CI, 1.64 - 16.56).The value of ORe associated with single environmental factor DDT high residues, and ORg associated with single GSTM1 deletion genotype were respectively 3.86 (1.20 - 12.47) and 1.34 (0.36 - 5.08). The OReg associated with combined action of two factors was 5.59 (1.63 - 18.90), and the value of interaction parameters (γ) equaled 1.24. The value of ORe associated with single environmental factor HCH higher residue and ORg associated with single GSTM1 deletion genotype were respectively 2.73 (0.84 - 8.87) and 1.48 (0.49 - 4.60). The value of OReg associated with combined action of two factors was 3.87 (1.18 - 12.68), and γ equaled 1.38. Conclusion: The results indicated that breast cancer occurrence was the combined result of environmental and genetic factors. The concurrent action of GSTM1 deletion genotype and DDT/HCH enhanced the risk of breast cancer.
基金Project supported by the Science and Technology Planning Project of Zhejiang Province(No.2009C33165)the Medical Science Research Fund Scheme of Zhejiang Province(No.2008A060),China
文摘Objective:To evaluate the predictive values of gene expressions of ribonucleotide reductase M1(RRM1) and breast cancer susceptibility gene 1(BRCA1) in peripheral blood from Chinese patients with non-small-cell lung cancer(NSCLC) treated with gemcitabine plus platinum.Methods:Forty Chinese patients with advanced NSCLC were recruited and received gemcitabine 1200 mg/m 2 on Days 1 and 8 plus carboplatin AUC 5 on Day 1.RRM1 and BRCA1 expression levels in peripheral blood were detected by quantitative reverse transcription-polymerase chain reaction(RT-PCR) .Kaplan-Meier survival curve and log-rank test were performed to evaluate the correlation between gene expression and overall survival for these subjects.Results:No correlation was observed between gene expression of RRM1 and that of BRCA1(P>0.05) ,but there was a strong correlation between the expression of RRM1 and the response to chemotherapy(P=0.003) .Subjects with low RRM1 expression levels in peripheral blood had longer sur-vival time than those with high RRM1 expression levels(16.95 vs.12.76 months,log-rank 3.989,P=0.046) .However,no significant association between BRCA1 expression levels and survival time was found(16.80 vs.13.77 months,log-rank 0.830,P=0.362) .Conclusions:Patients with low RRM1 expression levels in peripheral blood have a greater response to chemotherapy and longer survival time.Advanced NSCLC patients with low RRM1 expression levels may benefit from gemcitabine plus platinum therapy.RRM1 mRNA expression in peripheral blood could be used to predict the prognosis of NSCLC treated by gemcitabine and platinum.
文摘目的通过筛查GSTM1基因SNPs位点,研究该基因编码区单核苷酸多态位点T1270533G与鼻咽癌易感性和临床表型的关系。方法用PCR方法对中国人群27个个体DNA标本进行扩增、纯化及测序,从中获得GSTM1编码区、调控区和侧翼区及部分内含子区SNP位点,所获数据进行LD分析。选择编码区多态性位点T1270533G(该位点在中国人群罕见等位基因频率为22.2%),用tetra-Primer ARMS-PCR结合测序方法对鼻咽癌患者和对照人群进行相关性分析。结果通过测序共获取29个SNPs;其中13个SNPs位点之间均呈高度连锁不平衡;编码区多态性位点T1270533G的变异与鼻咽癌临床表型之间无明显关联(RR=0.170,95%CI=0.95-0.306 for homozygoteTT)。结论编码区多态位点T1270533G虽然发生了碱基顛换,产生了错义突变,导致了氨基酸的改变,但并没有影响其解毒功能。该位点在鼻咽癌患者和对照人群中等位基因型频率差别很小,与中国广东地区鼻咽癌易感性无明显关联。
