Please use this identifier to cite or link to this item: https://www.arca.fiocruz.br/handle/icict/17643
Title: Genotypic Analysis of the gp41 HR1 Region From HIV-1 isolates From Enfuvirtide-Treated and Untreated Patients
Authors: Pessoa, Luciana Santos
Valadão, Ana Luiza Chaves
Abreu, Celina Monteiro
Calazans, Alexandre Rodrigues
Martins, Angélica Nascimento
Azevedo, Suwellen S. S. D.
Fernandez, José Carlos Couto
Azevedo, Marcelo C. M. V.
Tanuri, Amilcar
Affilliation: Universidade Federal do Rio de Janeiro, Rio de Janeiro. Instituto de Biologia. Departamento de Genética. Rio de Janeiro, RJ, Brasil
Universidade Federal do Rio de Janeiro, Rio de Janeiro. Instituto de Biologia. Departamento de Genética. Rio de Janeiro, RJ, Brasil
Universidade Federal do Rio de Janeiro, Rio de Janeiro. Instituto de Biologia. Departamento de Genética. Rio de Janeiro, RJ, Brasil
Universidade Federal do Rio de Janeiro, Rio de Janeiro. Instituto de Biologia. Departamento de Genética. Rio de Janeiro, RJ, Brasil
Universidade Federal do Rio de Janeiro, Rio de Janeiro. Instituto de Biologia. Departamento de Genética. Rio de Janeiro, RJ, Brasil
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de AIDS e Imunologia Molecular. Rio de Janeiro, RJ. Brasil.
Fundação Oswaldo Cruz. Instituto Oswaldo Cruz. Laboratório de AIDS e Imunologia Molecular. Rio de Janeiro, RJ. Brasil.
Universidade Federal do Estado do Rio de Janeiro. Hospital Universitário Gaffreé Guinle. Ambulatório de Imunologia. Rio de Janeiro, RJ, Brasil.
Universidade Federal do Rio de Janeiro, Rio de Janeiro. Instituto de Biologia. Departamento de Genética. Rio de Janeiro, RJ, Brasil
Abstract: Objective: To evaluate the polymorphisms and resistance mutations in gp41 HR1 region of HIV-1. Methods: The study included 28 HIV-positive patients undergoing enfuvirtide (ENF) treatment or not from Porto Alegre, Rio Grande do Sul state, and Rio de Janeiro, Rio de Janeiro state, between 2006 and 2009. Resistance mutations and polymorphisms of the gp41 HR1 region were detected using the genomic DNA of 12 ENF-untreated patients and 16 patients in ENF treatment, encompassing subtypes B, C, and F1. Sample subtypes were determined by neighbor-joining phylogenetic analysis with a Kimura’s two-parameter correction. Results: A high prevalence of polymorphisms unrelated to resistance was observed. Among ENF-untreated patients, 16% showed mutations related with resistance. Among patients in ENF treatment, 50% had resistance-related mutations. Overall, 17% of all isolates showed the N42S polymorphism related to ENF hypersusceptibility. The presence of ENF resistance mutations in the group of treated patients reduced viral load. The V38A substitution was the most frequent among treatment-experienced patients followed by the G36D/E, N42D, and V38M substitutions. Conclusions: The V38A substitution in the gp41 HR region was the most common resistance mutation among ENF-treated patients and was associated with increased viral load.
Keywords: HIV-1
gp41
enfuvirtide
antiviral drug resistance
keywords: HIV-1
Resistência a Medicamentos Antivirais
DeCS: Proteína gp41 do Envelope de HIV
Issue Date: 2011
Publisher: Lippincott, Williams & Wilkins
Citation: PESSOA, Luciana Santos; et al. Genotypic Analysis of the gp41 HR1 Region From HIV-1 isolates From Enfuvirtide-Treated and Untreated Patients. J Acquir Immune Defic Syndr., v.57, Suppl.3, 5p, 2011.
ISSN: 1525-4135
Copyright: restricted access
Appears in Collections:IOC - Artigos de Periódicos

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