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• W2080402447 abstract "Purpose of the study Monitoring of primary resistance in HIV-1 variants circulating in Russia and FSU countries is the important task of HIV infection molecular epidemiology. The data of HIV molecular epidemiology are absent or limited in many FSU countries. IDU-A variant of HIV-1 subtype A has been dominating in Russia (>90%) and other FSU countries since 1996. Additionally, the Central Asian region (e.g. Kazakhstan and Uzbekistan) is characterized by relatively wide spread of CRF02_AG recombinant. The aim of our study was the analysis of HIV primary drug resistance in HIV-1 variants from Kazakhstan. Methods Blood collection from the HIV-infected naïve patients was carried out by local specialists. The study was performed with the informed consent of patients. All sequences of pol gene were analyzed by COMETv0.1 and HIVdb on-line programs. The phylogenetic analysis and tropism testing were carried out by MEGA4.0 and geno2pheno. Summary of results 51 PBMC samples were analyzed. According to pol gene phylogenetic analysis and genotyping 24 (47.0%) samples belonged to recombinant CRF02_AG; 25 (49.0%)-to subtype A1; 2 (3.9%)-to CRF03_AB circulating in Russia and some FSU countries. Only one subtype A1 sample had D30N mutation in Pro-region that cause high-level resistance to NFV. All AG-samples had K20I substitution which is characteristic for HIV-1 subtype A and G and is believed to be associated with resistance to LPV and NFV. In addition, we found that 2 AG-samples had L10V and L76I substitutions, accordingly. Two A1-subtype samples studied had L10I and K43T, accordingly. A62V characteristic mutation in RT-region was found in 12 (48%) subtype A1-samples. One of them had M184I mutation as well. Besides, we found 3 A1-samples harboring NNRTIs resistance mutations-K103N, G190S, K238N, accordingly. Further we analyzed IN region of pol-gene in 16 and env-gene in 23 samples studied. We found only one E157Q mutation (in CRF03_AB sample) in IN region. As to tropism, only two subtype A1 and 1 CRF03_AB samples belonged to X4/X4R5 variant, all these A1-subtype samples harbored A62V and one of them-G190S in RT region of pol-gene; the other samples were treated as R5 variants. Conclusions Our data demonstrated the low level of HIV primary drug resistance in Kazakhstan. HIV-1 subtype A variant dominates on this territory, but CRF02_AG recombinant is rather widespread as well. CRF02_AG variant studied has characteristic features in Pro region compared with IDU-A." @default.
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• W2080402447 date "2012-11-11" @default.
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• W2080402447 title "Analysis of HIV-1 primary drug resistance in Kazakhstan" @default.
• W2080402447 doi "https://doi.org/10.7448/ias.15.6.18209" @default.
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