Genotypes and polymorphisms of mutant CCR5-△32,CCR2-64I and SDF1-3'A HIV-1 resistance alleles in indigenous Han Chinese  

中国汉族人群中HIV抗性的CCR5-△32、CCR2-64和SDF1-3′A等位基因型和多态性研究(英文)

作　　者：王福生[1] 金磊[1] 雷周云[1] 施红[1] 洪卫国[1] 徐东平[1] 蒋建东[2] 汪悦[2] 张冰[1] 刘明旭[1] 李跃旗[3] 

机构地区：[1]解放军第三○二医院生物工程研究室,北京市丰台路26号100039 [2]美国纽约大学MountSinai医学院肿瘤研究中心 [3]解放军第三○二医院门诊部

出　　处：《Chinese Medical Journal》2001年第11期42-46,105-106,共7页中华医学杂志（英文版）

基　　金：ThisprojectwassupportedbyagrantfromNationalNaturalSciencesFoundationofthePRChina (No 3 9770 683 )

摘　　要：Objective To evaluate the frequencies and polymorphisms of CCR5-△32,CCR2-641 and SDF1-3'A alleles conferring resistance to HIV-1 infection in Chinese population from Han ethnic origin.Methods This cohort was comprised of 1251 subjects(915 men and 336 women)aged 15 -80 years and none was HIV-1 positive.Genotyping of allelic CCR5-△32,CCR2-641 and SDF1-3' A variants was performed using PCR or PCR/RFLP assay,and further confirmed by direct DNA sequencing.Results Our finding shows that the△32 deletion mutation in the CCR5 gene does occur in this population and can be inherited in a Mendelian fashion in indigenous Han Chinese at a very low frequency of 0.00119(n= 1254).The frequencies of mutant CCR2-641 and SDF1-3'A alleles were 0.20023(n = 1251)and 0.2873(n = 893),in this population,which are higher than those found in American Caucasians.Furthermore the polymorphisms of CCR2-641 and SDF1-3' A alleles in the Han Chinese population were different from those in American Caucasians.Statistical analysis showed that the genotype distribution of CCR5-△32,CCR2-641 and SDF1-3' A alleles was in equilibrium according to the Hardy-Weinberg equation.Conclusion The CCR5-△32 mutation may not be a major resistant factor against HIV-1 infection in indigenous Han Chinese.The significance of higher frequencies of CCR2-641 and SDF1-3' A alleles (0.20023 and 0.2791)in the Han population remains to be clarified in HIV-1-positive carriers and AIDS patients.目的　为了评估中国汉族人群对HIV感染的遗传易感性 ,我们检测和分析了相应人群的CCR5 △ 32、CCR2 6 4I和SDF1 3’A等位基因的突变频率和多态性。方法　被研究的人群包括 12 5 4例中国普通汉族人 (918例男性、336例女性 ) ,年龄范围在 15 - 80岁之间 ,他们中没有HIV感染者。应用PCR和PCR/RFLP等分子生物学方法检测了CCR5 △ 32、CCR2 6 4I和SDF1 3’A等位基因型 ,用直接DNA测序法进一步证实其准确性。结果　我们发现在汉族人的CCR5基因编码中的确存在△ 32碱基缺失突变 (频率为 0 0 0 119,n =12 5 4) ,并可能经过孟德尔方式遗传 ;而CCR2 6 4I和SDF1 3’A等位基因的突变频率分别是 0 2 0 0 2 3(n =12 5 1)和 0 2 873(n =893)。可见汉族人群的CCR2 6 4I和SDF1 3’A突变频率高于美国白人 ,并且在基因多态性组成上与美国白人不同。统计学分析表明中国汉族人群中上述三个等位基因型的分布符合Hardy Weinberg平衡。结论　上述结果提示中国汉族人群中CCR5 △ 32遗传突变可能不是抗HIV感染的主要因素 ,因此汉族人群对性传播的R 5病毒株可能有较大的遗传易感性。中国汉族人群具有较高的CCR2 6 4I和SDF1

关 键 词：HIV-1·  chemokine receptor 5 (CCR5) · polymorphism ·allelic frequency· mutation 

分 类 号：R512.91[医药卫生—内科学]