目的探讨Toll样受体4（TLR4）基因Asp299Gly多态性与脑膜炎球菌病易感性的关系。方法检索Pubmed,Cohrance,Embase,CNKI,维普,万方等数据平台从建库截止到2015年12月31日的文献,搜寻符合纳入和排除条件的随机对照研究,Rev Man5.0.0软件进...目的探讨Toll样受体4（TLR4）基因Asp299Gly多态性与脑膜炎球菌病易感性的关系。方法检索Pubmed,Cohrance,Embase,CNKI,维普,万方等数据平台从建库截止到2015年12月31日的文献,搜寻符合纳入和排除条件的随机对照研究,Rev Man5.0.0软件进行Meta分析。结果共纳入4篇文献,样本总量3 707例,其中研究组1 681例,对照组2 026例。Meta分析未见TLR4基因Asp299Gly多态性与脑膜炎球菌病易感性相关（等位基因A vs G∶OR=1.01,95%CI=0.84-1.23,P=0.89;基因型AA/AG vs GG∶OR=1.05,95%CI=0.55-2.02,P=0.87;基因型AA vs AG/GG∶OR=1.01,95%CI=0.82-1.24,P=0.95）。结论未见TLR4基因Asp299Gly多态性与脑膜炎球菌病易感性相关。展开更多
目的系统评价Toll样受体4(TLR4)基因Asp299Gly基因多态性与肺炎链球菌病易感性的相关性。方法计算机检索Pubmed,Cohrance,Embase,CNKI,维普,万方等网站,检索时限均为各数据库建库到2016年7月31日,搜寻符合纳入和排除条件的随机对照研究...目的系统评价Toll样受体4(TLR4)基因Asp299Gly基因多态性与肺炎链球菌病易感性的相关性。方法计算机检索Pubmed,Cohrance,Embase,CNKI,维普,万方等网站,检索时限均为各数据库建库到2016年7月31日,搜寻符合纳入和排除条件的随机对照研究,采用Rev Man5.3软件进行Meta分析及相关统计学分析。结果共纳入5篇文献,样本量总计为1456例,其中研究组501例,对照组955例。Meta分析未见TLR4基因Asp299Gly多态性与肺炎链球菌病易感性相关(等位基因A vs G:OR=1.01,95%CI=0.49~2.07,P=0.98;基因型AA/AG vs GG:OR=0.67,95%CI=0.18~2.48,P=0.55;基因型AA vs AG/GG:OR=1.01,95%CI=0.47~2.19,P=0.98)。结论未见TLR4基因Asp299Gly多态性与肺炎链球菌病易感性相关。展开更多
AIM： TO investigate toll-like receptor 2 （TLR2） -196 to -274 del, and TLR4 （＋896A/G rs4986790 and ＋1196C/ T rs4986791） polymorphisms at risk of chronic gastritis and gastric cancer in a Brazilian population and...AIM： TO investigate toll-like receptor 2 （TLR2） -196 to -274 del, and TLR4 （＋896A/G rs4986790 and ＋1196C/ T rs4986791） polymorphisms at risk of chronic gastritis and gastric cancer in a Brazilian population and associ-ation of gastric lesions with risk factors such as smoking, alcohol intake and Helicobacter pylori infection.METHODS： In this casecontrol study, polymorphism at TLR2 -96 to -174 del was investigated by using the allele-specific polymerase chain reaction （PCR） method, while the PCR-restriction fragment length polymorphism technique was carried out to identify the TLR4 （rs4986790 and rs4986791） genotypes in 607 Brazilian individuals （208 with chronic gastritis-CG, 174 with gastric cancer-GC and 225 controls -C）.RESULTS： The single nucleotide polymorphisms TLR4＋1196ClT was not associated with risk of chronic gastritis or gastric cancer and the homozygous genotypes TLR4＋896GG and TLR4＋1196TF were absent in the studied population. However, the frequency of TLR2 -196 to -174 ins/del ＋ del/del and TLR4＋896AGgenotypes was significantly higher （P 〈 0.01 and P = 0.01, respectively） in the cancer group （33.4% and 11.5%, respectively） than in the control group （16.9% and 4.5%, respectively）. It was also observed that the G-C haplotype of the TLR4＋896A/G＋1196C/T （P = 0.02） and the combination of variant alleles of the TLR21TLR4＋896G （P = 0.02） are associated with susceptibility to gastric cancer. In addition, the multiple logistic regression showed that male gender [odds ratio （OR） = 2.70; 95% CI： 1.66-4.41; P 〈 0.01], alcohol intake （OR = 2.93; 95% CI： 1.76-4.87, P 〈 0.01）, TLR2 -196 to -174 del （OR = 2.64; 95% CI： 1.56-4.44; P 〈 0.01） and TLR4＋896G （OR = 3.19; 95% CI： 1.34- 7.61; P 〈 0.01） polymorphisms were associated with a higher susceptibility to developing this neoplasm.CONCLUSION： Our data indicate that T/R2 -196 to -174 del and TLR4＋896G may increase the risk of gastric cancer in a Brazilian population.展开更多
AIM: To study the polymorphisms of toll-like receptor 4 (TLR4) gene Asp299Gly, Thr399Ile and TLR2 gene Arg753Gln, Arg677Trp and susceptibility to inflammatory bowel disease (IBD) in the Zhuang population from Guangxi,...AIM: To study the polymorphisms of toll-like receptor 4 (TLR4) gene Asp299Gly, Thr399Ile and TLR2 gene Arg753Gln, Arg677Trp and susceptibility to inflammatory bowel disease (IBD) in the Zhuang population from Guangxi, China. METHODS: A case-control study was performed from February 2007 to October 2011 which included 146 Zhuang patients with IBD in the experimental group and 164 healthy Zhuang subjects who acted as the control group. All patients and healthy subjects were from the Guangxi Zhuang Autonomous Region of China. Genomic DNA was extracted from intestinal tissue by the phenol chloroform method. TLR4 gene Asp299Gly, Thr399Ile and TLR2 gene Arg753Gln, Arg677Trp were amplified by polymerase chain reaction (PCR), and then detected by PCR-restriction fragment length polymorphism (RFLP). RESULTS: The TLR4 gene Asp299Gly was digested using Nco Ⅰ restriction enzyme, and a single band of 249 bp was observed which showed that it was a wild type (AA). The TLR4 gene Thr399Ile was digested using Hinf Ⅰrestriction enzyme and only the wild type (CC) was detected. In addition, the TLR2 gene Arg-677Trp was digested using Aci Ⅰ restriction enzyme and only the wild type (CC) was detected. The TLR2 gene Arg753Gln was digested using Pst Ⅰ restriction enzyme. Only the wild type (GG) as a single band of 254 bp was observed during RFLP. Overall, no heterozygous or homozygous single nucleotide polymorphism mutations were found in patients with Crohn's disease and ulcerative colitis both in the TLR4 gene Asp299Gly, Thr399Ile and the TLR2 gene Arg677Trp, Arg753Gln in the Zhuang population from the Guangxi Zhuang Autonomous Region of China. CONCLUSION: The TLR4 gene Asp299Gly, Thr399Ile and TLR2 gene Arg753Gln, Arg677Trp polymorphisms may not be associated with IBD in the Zhuang population from the Guangxi Zhuang Autonomous Region of China.展开更多
文摘目的探讨Toll样受体4（TLR4）基因Asp299Gly多态性与脑膜炎球菌病易感性的关系。方法检索Pubmed,Cohrance,Embase,CNKI,维普,万方等数据平台从建库截止到2015年12月31日的文献,搜寻符合纳入和排除条件的随机对照研究,Rev Man5.0.0软件进行Meta分析。结果共纳入4篇文献,样本总量3 707例,其中研究组1 681例,对照组2 026例。Meta分析未见TLR4基因Asp299Gly多态性与脑膜炎球菌病易感性相关（等位基因A vs G∶OR=1.01,95%CI=0.84-1.23,P=0.89;基因型AA/AG vs GG∶OR=1.05,95%CI=0.55-2.02,P=0.87;基因型AA vs AG/GG∶OR=1.01,95%CI=0.82-1.24,P=0.95）。结论未见TLR4基因Asp299Gly多态性与脑膜炎球菌病易感性相关。
文摘目的系统评价Toll样受体4(TLR4)基因Asp299Gly基因多态性与肺炎链球菌病易感性的相关性。方法计算机检索Pubmed,Cohrance,Embase,CNKI,维普,万方等网站,检索时限均为各数据库建库到2016年7月31日,搜寻符合纳入和排除条件的随机对照研究,采用Rev Man5.3软件进行Meta分析及相关统计学分析。结果共纳入5篇文献,样本量总计为1456例,其中研究组501例,对照组955例。Meta分析未见TLR4基因Asp299Gly多态性与肺炎链球菌病易感性相关(等位基因A vs G:OR=1.01,95%CI=0.49~2.07,P=0.98;基因型AA/AG vs GG:OR=0.67,95%CI=0.18~2.48,P=0.55;基因型AA vs AG/GG:OR=1.01,95%CI=0.47~2.19,P=0.98)。结论未见TLR4基因Asp299Gly多态性与肺炎链球菌病易感性相关。
基金Supported by The So Paulo State Research Foundation,No.2010/00507-0CNPq,No.471908/2010-0
文摘AIM： TO investigate toll-like receptor 2 （TLR2） -196 to -274 del, and TLR4 （＋896A/G rs4986790 and ＋1196C/ T rs4986791） polymorphisms at risk of chronic gastritis and gastric cancer in a Brazilian population and associ-ation of gastric lesions with risk factors such as smoking, alcohol intake and Helicobacter pylori infection.METHODS： In this casecontrol study, polymorphism at TLR2 -96 to -174 del was investigated by using the allele-specific polymerase chain reaction （PCR） method, while the PCR-restriction fragment length polymorphism technique was carried out to identify the TLR4 （rs4986790 and rs4986791） genotypes in 607 Brazilian individuals （208 with chronic gastritis-CG, 174 with gastric cancer-GC and 225 controls -C）.RESULTS： The single nucleotide polymorphisms TLR4＋1196ClT was not associated with risk of chronic gastritis or gastric cancer and the homozygous genotypes TLR4＋896GG and TLR4＋1196TF were absent in the studied population. However, the frequency of TLR2 -196 to -174 ins/del ＋ del/del and TLR4＋896AGgenotypes was significantly higher （P 〈 0.01 and P = 0.01, respectively） in the cancer group （33.4% and 11.5%, respectively） than in the control group （16.9% and 4.5%, respectively）. It was also observed that the G-C haplotype of the TLR4＋896A/G＋1196C/T （P = 0.02） and the combination of variant alleles of the TLR21TLR4＋896G （P = 0.02） are associated with susceptibility to gastric cancer. In addition, the multiple logistic regression showed that male gender [odds ratio （OR） = 2.70; 95% CI： 1.66-4.41; P 〈 0.01], alcohol intake （OR = 2.93; 95% CI： 1.76-4.87, P 〈 0.01）, TLR2 -196 to -174 del （OR = 2.64; 95% CI： 1.56-4.44; P 〈 0.01） and TLR4＋896G （OR = 3.19; 95% CI： 1.34- 7.61; P 〈 0.01） polymorphisms were associated with a higher susceptibility to developing this neoplasm.CONCLUSION： Our data indicate that T/R2 -196 to -174 del and TLR4＋896G may increase the risk of gastric cancer in a Brazilian population.
基金Supported by The Natural Science Foundation of Guangxi Zhuang Autonomous Region, China, No. 0832009the Chinese Traditional Medicine Science Foundation of Guangxi Zhuang Autonomous Region, China, No. GZKZ10-108
文摘AIM: To study the polymorphisms of toll-like receptor 4 (TLR4) gene Asp299Gly, Thr399Ile and TLR2 gene Arg753Gln, Arg677Trp and susceptibility to inflammatory bowel disease (IBD) in the Zhuang population from Guangxi, China. METHODS: A case-control study was performed from February 2007 to October 2011 which included 146 Zhuang patients with IBD in the experimental group and 164 healthy Zhuang subjects who acted as the control group. All patients and healthy subjects were from the Guangxi Zhuang Autonomous Region of China. Genomic DNA was extracted from intestinal tissue by the phenol chloroform method. TLR4 gene Asp299Gly, Thr399Ile and TLR2 gene Arg753Gln, Arg677Trp were amplified by polymerase chain reaction (PCR), and then detected by PCR-restriction fragment length polymorphism (RFLP). RESULTS: The TLR4 gene Asp299Gly was digested using Nco Ⅰ restriction enzyme, and a single band of 249 bp was observed which showed that it was a wild type (AA). The TLR4 gene Thr399Ile was digested using Hinf Ⅰrestriction enzyme and only the wild type (CC) was detected. In addition, the TLR2 gene Arg-677Trp was digested using Aci Ⅰ restriction enzyme and only the wild type (CC) was detected. The TLR2 gene Arg753Gln was digested using Pst Ⅰ restriction enzyme. Only the wild type (GG) as a single band of 254 bp was observed during RFLP. Overall, no heterozygous or homozygous single nucleotide polymorphism mutations were found in patients with Crohn's disease and ulcerative colitis both in the TLR4 gene Asp299Gly, Thr399Ile and the TLR2 gene Arg677Trp, Arg753Gln in the Zhuang population from the Guangxi Zhuang Autonomous Region of China. CONCLUSION: The TLR4 gene Asp299Gly, Thr399Ile and TLR2 gene Arg753Gln, Arg677Trp polymorphisms may not be associated with IBD in the Zhuang population from the Guangxi Zhuang Autonomous Region of China.
