title: HIV type 1 BF recombinant strains exhibit different pol gene mosaic patterns: descriptive analysis from 284 patients under treatment failure.
abstract: Different complex structures of the pol gene have been identified in 284 HIV-1 B/F recombinant sequences obtained from a group of 587 patients under treatment failure from Argentina. To analyze the mosaic structures of these viral sequences and to determine their phylogenetic relationship, the 284 partial pol gene sequences of BF recombinant viruses were amplified by RT-PCR and sequenced. Intersubtype breakpoints were analyzed by bootscanning. Phylogenetic relationships were determined by means of neighbor-joining trees. The analysis of the sequences showed multiple phylogenetic topologies clustering within intersubtype BF reference sequences. At least three different mosaic patterns were found compared to previously described BF-type viruses with unequal distribution in the studied population. The analysis also showed that HIV-1 BF recombinant viruses with diverse mosaic structures are phylogenetically related in their F segments and in selected B fragments with the F1 subtype and with BF recombinant viruses from Brazil, respectively, suggesting a common recombinant ancestor. No association was observed between the prevalence of each mosaic pattern and the frequency of major drug-resistance mutations in PR and RT.
authors.affiliation: Centro Nacional de Referencia para el SIDA, Departamento de Microbiología, Facultad de Medicina, Universidad de Buenos Aires, 1121 Buenos Aires, Argentina. quarleri@fmed.uba.ar
authors.forename: Jorge F
authors.initials: JF
authors.lastname: Quarleri
authors.forename: Andrea
authors.initials: A
authors.lastname: Rubio
authors.forename: Mauricio
authors.initials: M
authors.lastname: Carobene
authors.forename: Gabriela
authors.initials: G
authors.lastname: Turk
authors.forename: Moira
authors.initials: M
authors.lastname: Vignoles
authors.forename: Richard P
authors.initials: RP
authors.lastname: Harrigan
authors.forename: Julio S G
authors.initials: JS
authors.lastname: Montaner
authors.forename: Horacio
authors.initials: H
authors.lastname: Salomón
authors.forename: Manuel
authors.initials: M
authors.lastname: Gómez-Carrillo
mesh_terms: D019380:Anti-HIV Agents / Q000494:pharmacology / Q000627:therapeutic use*; D001118:Argentina; D024882:Drug Resistance, Viral; D004359:Drug Therapy, Combination; D015751:Genes, pol / Q000235:genetics*; D015658:HIV Infections / Q000188:drug therapy* / Q000821:virology; D016333:HIV Protease / Q000235:genetics; D054303:HIV Reverse Transcriptase / Q000235:genetics; D015497:HIV-1 / Q000145:classification* / Q000187:drug effects / Q000235:genetics; D006801:Humans; D008969:Molecular Sequence Data; D009154:Mutation; D010802:Phylogeny; D011995:Recombination, Genetic; D018894:Reverse Transcriptase Inhibitors / Q000494:pharmacology / Q000627:therapeutic use*; D017422:Sequence Analysis, DNA; D017211:Treatment Failure
chemical_list: D019380:Anti-HIV Agents; D018894:Reverse Transcriptase Inhibitors; D054303:HIV Reverse Transcriptase; D016333:HIV Protease