ArticleBrazilian journal of microbiology : [publication of the Brazilian Society for Microbiology]2025
Molecular analysis of multiple HIV-1 BC recombinant strains circulating worldwide shows predominance of the C genotype in the viral genomic structure.
Article in Brazilian journal of microbiology : [publication of the Brazilian Society for Microbiology], 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The Human Immunodeficiency Virus 1 (HIV-1) is characterized by high rates of genetic diversity, being classified into groups, subtypes and recombinant forms. To date, 15 Circulating Recombinant Forms (CRFs) of subtypes B and C have been identified, three of them in 2021: CRF108_BC in Spain, CRF110_BC and CRF118_BC in China and one in 2024: CRF146_BC in Brazil. This study investigated the genetic diversity among circulating BC recombinant viruses. Near-Full Length Genomes (NFLG) of 229 BC strains were retrieved from the Los Alamos database. Recombination and phylogenetic analysis were conducted using bioinformatics tools. Sequences were obtained from 17 countries between 1992 and 2022. Fifteen CRFs and 81 distinct Unique Recombinant Forms (URFs) recombination patterns were identified. Preferential recombination points were found in pol (66.7%) and env (62.5%) genes, while subtype C is the predominant genetic form in gag, vif, vpr, tat, rev, tat2, rev2, nef and 3'-LTR genomic regions. Specific positions in pol and env genes maintain the B subtype, which may be related to the acquisition of adaptive advantage over subtype C.
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