title: Primary genetic characterization of HIV-1 isolates from WHO-sponsored vaccine evaluation sites by the RNase-A mismatch method.
abstract: We have analyzed by the RNase-A mismatch method 35 isolates from four WHO-sponsored vaccine evaluation sites as a secondary laboratory of the WHO Network for HIV Isolation and Characterization. The application of an estimator for the establishment of genetic distances based on the RNase-A digestion patterns in combination with the phylogenetic analysis has allowed us to construct a tree with five well defined groups of viruses. Because the clustering with known reference strains, samples from Brazil could be grouped as subtype B and the majority of those from Thailand were subtype E. Some of the samples from Uganda were classified as subtype D. Isolates from Rwanda and some from Uganda were identified as subtype A viruses. These results coincide with data obtained by heteroduplex mobility assay and nucleotide sequencing in env regions. The RNase-A mismatch method combined with phylogenetic analysis permitted the primary genetic classification of 33 of 35 samples from the WHO Network.
authors.affiliation: Centro Nacional de Biologia Celular y Retrovirus, Instituto de Salud Carlos III, Madrid, Spain.
authors.forename: S
authors.initials: S
authors.lastname: Sánchez-Palomino
authors.forename: J
authors.initials: J
authors.lastname: Dopazo
authors.forename: I
authors.initials: I
authors.lastname: Olivares
authors.forename: M J
authors.initials: MJ
authors.lastname: Martin
authors.forename: C
authors.initials: C
authors.lastname: López-Galíndez
mesh_terms: D016915:AIDS Vaccines; D005069:Evaluation Studies as Topic; D015699:HIV Envelope Protein gp120 / Q000235:genetics*; D015700:HIV Envelope Protein gp41 / Q000235:genetics*; D015497:HIV-1 / Q000145:classification / Q000235:genetics* / Q000302:isolation & purification; D006801:Humans; D012259:Ribonuclease, Pancreatic / Q000378:metabolism*; D014944:World Health Organization
chemical_list: D016915:AIDS Vaccines; D015699:HIV Envelope Protein gp120; D015700:HIV Envelope Protein gp41; D012259:Ribonuclease, Pancreatic