Molecular epidemiology and MT-2 cell tropism of Russian HIV type 1 variants

被引:84
作者
Leitner, T
Korovina, G
Marquina, S
Smolskaya, T
Albert, J
机构
[1] KAROLINSKA INST,SWEDISH INST INFECT DIS CONTROL,DEPT CLIN VIROL,S-10521 STOCKHOLM,SWEDEN
[2] ST PETERSBURG PASTEUR INST,AIDS CTR,ST PETERSBURG 197101,RUSSIA
关键词
D O I
10.1089/aid.1996.12.1595
中图分类号
R392 [医学免疫学]; Q939.91 [免疫学];
学科分类号
100102 ;
摘要
Twenty-two HIV-1-infected Russian individuals were studied to gain better insight on the genetic and biological characteristics of HIV-1 variants present in Russia, The V3 domain of the HIV-1 envelope was directly sequenced from uncultured peripheral blood mononuclear cells (PBMCs), Phylogenetic analyses were used to determine the HIV-1 genetic subtype and to study transmission patterns, Virus isolates were obtained from PBMCs and the biological phenotype was determined by coculture with MT-2, GEM, and Jurkat-tat cells, Twelve homo- and bisexual men carried subtype B variants, whereas 6 heterosexually infected individuals carried subtype F virus, A heterosexual man infected in the Ivory Coast and a nosocomially infected young female carried subtype A and G virus, respectively, Interestingly, phylogenetic analyses suggested that subtype B may have entered Russia on at least four occasions and, even more surprisingly, that the relatively rare subtype F has entered Russia on at least three occasions, Two suspected transmission clusters of subtype F were supported by the phylogenetic analyses, whereas one suspected subtype B transmission cluster was not, Positively charged amino acids in positions 311 and 325 of the V3 loop have been shown to be important determinants for the MT-2-positive biological phenotype of virus isolates, Interestingly, we found that the direct PBMC sequences from individuals with MT-2-positive isolates displayed specific neutral, instead of positively charged, amino acids in these positions, This indicates that it may be more difficult to predict the biological phenotype of HIV-1 using sequences from uncultured PBMCs than from virus isolates.
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页码:1595 / 1603
页数:9
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