Shcherbakova, Nadezhda SShalamova, Lyudmila ADelgado, ElenaFernandez-Garcia, AuroraVega Rocha, YolandaKarpenko, Larissa IIlyichev, Alexander ASokolov, Yuri VShcherbakov, Dmitry NPerez-Alvarez, LuciaThomson, Michael M2019-11-262019-11-262014-09AIDS Res Hum Retroviruses. 2014 Sep;30(9):912-9. doi: 10.1089/AID.2014.0075. Epub 2014 Aug 14.http://hdl.handle.net/20.500.12105/8711The HIV-1 epidemic in Russia is dominated by the former Soviet Union subtype A (A(FSU)) variant, but other genetic forms are circulating in the country. One is the recently described CRF63_02A1, derived from recombination between a CRF02_AG variant circulating in Central Asia and A(FSU), which has spread in the Novosibirsk region, Siberia. Here we phylogenetically analyze pol and env segments from 24 HIV-1 samples from the Novosibirsk region collected in 2013, with characterization of three new near full-length genome CRF63_02A1 sequences, and estimate the time of the most recent common ancestor (tMRCA) and the demographic growth of CRF63_02A1 using a Bayesian method. The analyses revealed that CRF63_02A1 is highly predominant in the Novosibirsk region (81.2% in pol sequences) and is transmitted both among injecting drug users and by heterosexual contact. Similarity searches with database sequences combined with phylogenetic analyses show that CRF63_02A1 is circulating in East Kazakhstan and the Eastern area of Russia bordering China. The analyses of near full-length genome sequences show that its mosaic structure is more complex than reported, with 18 breakpoints. The tMRCA of CRF63_02A1 was estimated around 2006, with exponential growth in 2008-2009 and subsequent stabilization. These results provide new insights into the molecular epidemiology, phylogeny, and phylodynamics of CRF63_02A1.engAMhttp://creativecommons.org/licenses/by-nc-sa/4.0/Base SequenceDNA PrimersFemaleHIV-1HumansMaleMolecular Sequence DataPolymerase Chain ReactionRecombination, GeneticSiberiaMolecular EpidemiologyPhylogenyAtribución-NoComercial-CompartirIgual 4.0 Internacional25050828309912-910.1089/AID.2014.00751931-8405AIDS research and human retrovirusesopen access