中国CRF01-AE亚型人类免疫缺陷病毒毒株的分子流行病学研究  

Distribution of recombinant human immunodeficiency virus type-1 CRF01-AE strains in China and its sequence variations in the env V3-C3 region

作　　者：邢辉[1] 梁浩[2] 万卓越[3] 陈曦[4] 魏民[1] 马鹏飞[1] 关琪[1] 全宇[1] 洪坤学[1] 邵一鸣 

机构地区：[1]中国疾病预防控制中心性病艾滋病预防与控制中心,北京100050 [2]广西医科大学公共卫生学院 [3]广东省疾病预防控制中心 [4]湖南省疾病预防控制中心

出　　处：《中华预防医学杂志》2004年第5期300-304,共5页Chinese Journal of Preventive Medicine

基　　金：国家杰出青年基金资助项目 (3 992 5 0 3 0 ) ;九七三国家重点基础研究基金资助项目 (G19990 5 410 7)

摘　　要：目的　通过对两次全国范围人类免疫缺陷病毒 (HIV)毒株分子流行病学研究 (NationalMolecularEpidemicStudy ,NMES)中发现的CRF0 1_AE重组HIV 1毒株的分析 ,研究该重组型毒株在我国的流行特点和基因变异特征。方法　从HIV感染者血液中提取前病毒DNA ,使用套式聚合酶链反应 (nested PCR)扩增HIV 1的env基因C2～V4区 ,PCR产物直接测序并使用GCG软件包进行序列分析。结果　到 2 0 0 2年底 ,从全国 31个省市自治区采集的标本中发现CRF0 1_AE重组型样本 16 9份 ,分布在 17个省。虽然CRF0 1_AE重组型仍然以性传播人群为主 [NMES1为 6 2 2 % (2 3/ 37) ,NMES2为5 5 3% (73/ 132 ) ],但吸毒人群中感染该重组型的比例明显增加 ,由NMES1的 2 7% (10 / 37)增加到NMES2的 4 1 6 % (5 7/ 137)。系统树分析可明显看到NMES2吸毒人群流行毒株远离NMES2中性传播人群和NMES1吸毒人群流行毒株。NMES2吸毒人群流行毒株的V3区氨基酸较保守 ,但C3区第 6、8、9、10、12、15、16位氨基酸呈现出规律性变化。结论　CRF0 1_AE亚型已从东南沿海和西南边境扩散至内陆 ,吸毒人群中该亚型比例不断上升。NMES2吸毒人群和NMES1吸毒人群中流行的CRF0 1_AE重组毒株序列明显不同 ,显示其可能有新的来源 ,并呈现扩大流行的态势。Objective To characterize CRF01_AE strains of recombinant human immunodeficiency virus type-1 (HIV-1) found in the Second National Molecular Epidemiology Study on HIV in China and to analyze its sequence variation in the env V3-C3 region during the First National Molecular Epidemiology Study (NMES1, 1996-1998) to the Second National Molecular Epidemiology Study (NMES2, 2001-2002). Methods DNA was extracted from peripheal blood mononuclear cells of the subjects with HIV infection. The env C2-V4 region of HIV-1 was amplified with nested polymerase chain reaction (n-PCR). PCR products were directly sequenced using ABI 377 DNA sequencer, then the gene-based phylogenetic tree was constructed and its variation of amino acids was analyzed with GCG software. Results Totally, 169 strains of recombinant HIV-1 CRF01_AE were identified from blood samples collected from different high risk groups in 17 of 31 provinces, municipalities and autonomous regions all over China by the end of 2002. Although sexual transmission still dominated during NMES1 (62.2%, 23/37) and NMES2 (55.3%, 73/132), prevalence of HIV-1 CRF01_AE in intravenous drug users (IDUs) increased to 41.6% (57/137) during NMES2 from 27% (10/37) during NMES1. Phylogenetic tree analysis showed that HIV-1 CRF01_AE strains prevalent in IDUs during NMES2 did not cluster with those prevalent in the subjects infected by sexual transmission during NMES2 and those in IDUs during NMES1. The amino acid residues of V3 region of HIV-1 CRF01_AE in IDUs were relatively conservative, but the sixth, eighth, ninth, tenth, twelfth, fifteenth, sixteenth amino acid residues of C3 region displayed regular changes. Conclusions HIV-1 CRF01_AE strain has been introduced into inland provinces from southeastern coast areas and southwestern border areas, with an increasing prevalence in IDUs. The sequence of env V3-C3 region of recombinant HIV-1 CRF01_AE strains prevalent in IDUs during NMES2 was obviously different from that during NMES1, suggesting that HIV-1 CRF01_AE strains prevalent

关 键 词：CRF 吸毒人群 亚型 人类免疫缺陷病毒 毒株 分子流行病学 HIV-1 组型 氨基酸 流行特点 

分 类 号：R181.3[医药卫生—流行病学]