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• W2047721867 abstract "Great variability in the course of human immunodeficiency virus type 1 (HIV-1) infection results from a complex interplay between host and virus factors. Some of the patients with prolonged nonprogressive infection have been reported to harbor virus variants with gross deletions in the accessory nef gene that has been implicated in in vivo pathogenicity in simian and mouse models. To investigate the role of nef-deleted HIV-1 in long-term nonprogressor (LTNP) drug addicts in Italy the nef sequence from proviral DNA was analyzed from five LTNPs and five rapid progressor controls. Only small (2-12 amino acids) in-frame deletions and insertions were detected in the N-terminal polymorphic and variable regions obtained from three LTNPs and one rapid progressor. There was no evidence of premature termination of the Nef protein and all of the identified functional motifs were well conserved in both groups. Phylogenetic analysis showed interdigitation of nef sequences obtained from LTNPs and rapid progressors. The nef sequence of one LTNP, however, diverged significantly from those of the other patients. Availability of two additional blood DNA samples obtained previously from this subject allowed to detect evolution of nef at 14-17 years of HIV-1 infection, including progressive deletions. Although alterations of nef may be relatively frequent and continue to evolve in LTNPs, this study of a small number of patients does not indicate that gross deletions or loss of functional motifs play a major role in delaying or halting disease progression in infected drug abusers in Italy." @default.
• W2047721867 created "2016-06-24" @default.
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• W2047721867 date "2000-03-01" @default.
• W2047721867 modified "2023-10-17" @default.
• W2047721867 title "Analysis of the HIV-1nef gene in five intravenous drug users with long-term nonprogressive HIV-1 infection in Italy" @default.
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• W2047721867 doi "https://doi.org/10.1002/(sici)1096-9071(200003)60:3<294::aid-jmv8>3.0.co;2-1" @default.
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