Proviral HIV-1 dynamics and evolution in patients receiving efficient long-term antiretroviral combination therapy.

Abstract:

OBJECTIVES:Different experimental approaches have shown that, despite plasma viral loads under the threshold of detection, HIV-1 frequently continues to replicate in patients receiving potent antiretroviral therapy. However, whether this low-grade viral replication is sufficient for the generation of new major quasispecies has not been studied. Thus, in order to evaluate the extent of variation in the major proviral HIV-1 population, we monitored proviral DNA sequences in such patients over a time period of up to 30 months. METHODS:DNA was extracted from peripheral blood mononuclear cells (PBMC) and the V3 region was amplified by nested polymerase chain reaction (PCR) and directly sequenced. Additionally, both HIV-1 RNA and DNA levels and CD4+ T-lymphocyte counts were monitored. RESULTS:Analysing the V3 gene sequences of 17 patients, we observed a sequence evolution in nine patients. Interestingly, the majority of these changes (77%) occurred in the first interval following the initiation of therapy and despite signs of ongoing replication the proviral DNA levels continued to decrease in all patients. CONCLUSIONS:Our data suggest that, although available data report that HIV-1 continues to replicate in patients with undetectable viraemia, the extent of viral replication in many of these patients is not sufficient to result in changes in the major viral population.

journal_name

HIV Med

journal_title

HIV medicine

authors

Birk M,Aleman S,Visco-Comandini U,Sönnerborg A

doi

10.1046/j.1468-1293.2000.00030.x

keywords:

subject

Has Abstract

pub_date

2000-10-01 00:00:00

pages

205-11

issue

4

eissn

1464-2662

issn

1468-1293

pii

hiv030

journal_volume

1

pub_type

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