title: Examination of real-time PCR for HIV-1 RNA and DNA quantitation in patients infected with HIV-1 BF intersubtype recombinant variants.
abstract: The impact of HIV-1 genetic diversity on the performance of laboratory testing is an issue that has to be monitored continuously. An "in-house" real-time PCR assay was developed by the Agence Nationale de Recherche sur le SIDA (ANRS) in France for viral load (VL) quantitation based on the amplification of the HIV-1 long terminal repeat (LTR) region. This technology has not been used in Argentina yet and considering the HIV-1 diversity in the country, a comparative analysis of this assay was undertaken versus the Versant HIV-1 RNA 3.0 Assay (b-DNA). The performance was assessed on 30 drug-naïve HIV-1 infected patients who were characterized previously by phylogenetic analysis of the pol and vpu gene. The results showed that there is a significant linear correlation between values of transformed viral load logarithms measured by both, bDNA and real-time PCR assay and that this assay can be used to quantify viral load in samples from BF-infected patients with the same accuracy and reliability as for B subtype samples. The use of "in-house" real-time PCR to measure DNA in PBMCs correlated strongly with the HIV-1 RNA levels in all specimens.
authors.affiliation: National Reference Center for AIDS, School of Medicine, University of Buenos Aires, Paraguay 2155 Piso 11, C1121ABG, Buenos Aires, Argentina.
authors.forename: N
authors.initials: N
authors.lastname: Schvachsa
authors.forename: G
authors.initials: G
authors.lastname: Turk
authors.forename: M
authors.initials: M
authors.lastname: Burgard
authors.forename: D
authors.initials: D
authors.lastname: Dilernia
authors.forename: M
authors.initials: M
authors.lastname: Carobene
authors.forename: M
authors.initials: M
authors.lastname: Pippo
authors.forename: M
authors.initials: M
authors.lastname: Gómez-Carrillo
authors.forename: C
authors.initials: C
authors.lastname: Rouzioux
authors.forename: H
authors.initials: H
authors.lastname: Salomon
mesh_terms: D004279:DNA, Viral / Q000032:analysis; D014644:Genetic Variation; D015658:HIV Infections / Q000175:diagnosis* / Q000821:virology; D016325:HIV Long Terminal Repeat / Q000235:genetics; D015497:HIV-1 / Q000145:classification / Q000235:genetics / Q000302:isolation & purification*; D006801:Humans; D021141:Nucleic Acid Amplification Techniques; D016133:Polymerase Chain Reaction / Q000379:methods*; D012367:RNA, Viral / Q000032:analysis*; D011995:Recombination, Genetic; D019562:Viral Load
chemical_list: D004279:DNA, Viral; D012367:RNA, Viral