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Genotypic testing on HIV-1 DNA as a tool to assess HIV-1 co-receptor usage in clinical practice: results from the DIVA study group

2013; Springer Science+Business Media; Volume: 42; Issue: 1 Linguagem: Inglês

10.1007/s15010-013-0510-3

1439-0973

Valentina Svicher, Claudia Alteri, Marco Aurélio Echart Montano, Achyuta Nori, Roberta D’Arrigo, Massimo Andreoni, Gioacchino Angarano, Andrea Antinori, Guido Antonelli, Tiziano Allice, Maria Carla Re, Fausto Baldanti, Ada Bertoli, Marco Borderi, Enzo Boeri, Isabella Bon, Bianca Bruzzone, Renata Barresi, S. Calderisi, Anna Paola Callegaro, Maria Rosaria Capobianchi, Franco Gargiulo, Francesco Castelli, Roberto Cauda, Francesca Ceccherini‐Silberstein, Massimo Clementi, Antonio Chirianni, Manuela Colafigli, A. D’Arminio Monforte, Andrea De Luca, Antonio Di Biagio, Giuseppe Di Nicuolo, Giovanni Di Perri, F. Di Santo, Giovanni Fadda, Massimo Galli, William Gennari, Valeria Ghisetti, Andrea Costantini, Andrea Gori, Roberto Gulminetti, F Leoncini, Gaetano Maffongelli, Franco Maggiolo, Renato Maserati, Francesco Mazzotta, Genny Meini, Valeria Micheli, Laura Monno, Cristina Mussini, Silvia Nozza, Stefania Paolucci, Giorgio Palù, Saverio Giuseppe Parisi, Giustino Parruti, A. R. Pignataro, Tiziana Quirino, Maria Carla Re, Giuliano Rizzardini, Maurizio Sanguinetti, Rosaria Santangelo, Renzo Scaggiante, Gaetana Sterrantino, Ombretta Turriziani, M Vatteroni, Claudio Viscoli, Vincenzo Vullo, Maurizio Zazzi, Adriano Lazzarin, Carlo Federico Perno,

HIV/AIDS Research and Interventions

We have developed a sequencing assay for determining the usage of the genotypic HIV-1 co-receptor using peripheral blood mononuclear cell (PBMC) DNA in virologically suppressed HIV-1 infected patients. Our specific aims were to (1) evaluate the efficiency of V3 sequences in B versus non-B subtypes, (2) compare the efficiency of V3 sequences and tropism prediction using whole blood and PBMCs for DNA extraction, (3) compare the efficiency of V3 sequences and tropism prediction using a single versus a triplicate round of amplification.The overall rate of successful V3 sequences ranged from 100 % in samples with >3,000 copies HIV-1 DNA/10(6) PBMCs to 60 % in samples with <100 copies total HIV-1 DNA /10(6) PBMCs. Analysis of 143 paired PBMCs and whole-blood samples showed successful V3 sequences rates of 77.6 % for PBMCs and 83.9 % for whole blood. These rates are in agreement with the tropism prediction obtained using the geno2pheno co-receptor algorithm, namely, 92.1 % with a false-positive rate (FPR) of 10 or 20 % and of 96.5 % with an FPR of 5.75 %. The agreement between tropism prediction values using single versus triplicate amplification was 98.2 % (56/57) of patients using an FPR of 20 % and 92.9 % (53/57) using an FPR of 10 or 5.75 %. For 63.0 % (36/57) of patients, the FPR obtained via the single amplification procedure was superimposable to all three FPRs obtained by triplicate amplification.Our results show the feasibility and consistency of genotypic testing on HIV-1 DNA tropism, supporting its possible use for selecting patients with suppressed plasma HIV-1 RNA as candidates for CCR5-antagonist treatment. The high agreement between tropism prediction by single and triple amplification does not support the use of triplicate amplification in clinical practice.