CAG-repeat variant in the polymerase γ gene and male infertility in the Chinese population： a meta-analysis
CAG-repeat variant in the polymerase γ gene and male infertility in the Chinese population： a meta-analysis作者机构：Department of Medical Genetics Institute of Medical Biology Chinese Academy of Medical Sciences and Peking Union Medical College Kunming 650118 China Reproductive of Medical Research Centre of People＇s Hospital of Shiyan 442000 Shiyan China
出 版 物：《Asian Journal of Andrology》 (亚洲男性学杂志（英文版）)
年 卷 期：2011年第13卷第2期
页 面：298-304页
核心收录：
学科分类：0831[工学-生物医学工程（可授工学、理学、医学学位）] 0710[理学-生物学] 1004[医学-公共卫生与预防医学(可授医学、理学学位)] 07[理学] 08[工学] 09[农学] 071007[理学-遗传学] 0901[农学-作物学] 0836[工学-生物工程] 090102[农学-作物遗传育种] 10[医学]
基 金：美国中华医学基金会(CMB)资助
主 题：case-control study male infertility meta-analysis POLG-CAG-repeat
摘 要：Several studies have reported a relationship between the length of the CAG-repeat in the polymerase y （POLG） gene and male infertility. However, other studies have not reproduced this result. In our study, the POLG-CAG-repeat length was analyzed in 535 healthy individuals from six Chinese Han populations living in different provinces. The frequencies of IO-CAG alleles and genotypes were high （97.38 and 94.13%, respectively）, with no significant difference among the six Chinese Han populations. Furthermore, we determined the distribution of the POLG-CAG-repeat in 150 infertile men and 126 fertile men. Our study suggested that the distributions of POLG-CAG-repeat alleles and genotypes were not significantly different between infertile （95.67 and 92.67%, respectively） and fertile men （97.22 and 94.44%, respectively）. In a subsequent meta-analysis, combining our data with data from previous studies, a comparison of the CAG-repeat alleles in fertile versus infertile men showed no obvious risk for male infertility associated with any particular allele （pooled odds ratio （0R）=0.94; 95% confidence interval （CI）： 0.60-1.48）. The significance level was not attained with any of the following genetic models： homozygote comparison （not lO/not 10 versus 10110： OR= 1.34; 95% Ch 0.66-2.72）, heterozygote comparison （lO/not 10 versus 10/10： OR= 1.04; 95% Ch 0.78-1.38）, dominant model comparison （not lO/not 10＋ 101 not 10 versus 10110. OR= 1.08; 95% Ch 0.79-1.47） and recessive genetic comparison （not lO/not 10 versus lO/not 10＋ 10/10- OR= 1.31; 95% Ch 0.68-2.55）. In conclusion, there is no significant difference of the frequencies of POLG-CAG-repeat variants among six Chinese Han populations, and this polymorphism may not be associated with Chinese male infertility. On the basis of a meta-analysis, there is no obvious association between CAG-repeat variants of the POLG gene and male infertility.
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