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The HR2 polymorphism N140I in the HIV-1 gp41 combined with the HR1 V38A mutation is associated with a less cytopathic phenotype.

Francesc Cunyat | Silvia Marfil | Elisabet García | Valentina Svicher | Nuria Pérez-Alvárez | Marta Curriu | Carlo Federico Perno | Bonaventura Clotet | Julià Blanco | Cecilia Cabrera
Retrovirology | 2012

Resistance to the fusion inhibitor enfuvirtide (ENF) is achieved by changes in the gp41 subunit of the HIV envelope glycoprotein (Env). Specific ENF-associated mutational pathways correlate with immunological recovery, even after virological failure, suggesting that the acquisition of ENF resistance alters gp41 pathogenicity. To test this hypothesis, we have characterized the expression, fusion capability, induction of CD4+ T cell loss and single CD4+ T cell death of 48 gp41 proteins derived from three patients displaying different amino acids (N, T or I) at position 140 that developed a V38A mutation after ENF-based treatment.

Pubmed ID: 22333046

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