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. 1995 Jan;45(1):91-8.
doi: 10.1002/jmv.1890450117.

Increased number of single-LTR HIV-1 DNA junctions correlates with HIV-1 antigen expression and CD4+ cell decline in vivo

S Jurriaans  1 , A de Ronde, J Dekker, M Cornelissen, J Goudsmit
Affiliations

Increased number of single-LTR HIV-1 DNA junctions correlates with HIV-1 antigen expression and CD4+ cell decline in vivo

S Jurriaans et al. J Med Virol. 1995 Jan.

Abstract

Human immunodeficiency type 1 (HIV-1) DNA in peripheral blood cells of HIV-1 infected individuals may be present as integrated and/or unintegrated DNA. Several reports have indicated that a major proportion of HIV-1 DNA in the asymptomatic phase is linear, full-length, and unintegrated and in the symptomatic phase either circular unintegrated or integrated in the host genome. We developed a quantitative polymerase chain reaction (PCR) technique to detect single-LTR HIV-1 DNA junctions, reflecting the presence of unintegrated single-LTR circles. In vitro infection of a CD4+ T-cell line resulted first in the increase of single-LTR junctions followed by syncytium formation and a rise of p24 antigen production. The number of single-LTR HIV-1 DNA junctions was further studied in two acutely infected individuals and in 21 long-term infected individuals. The number of single-LTR junctions was significantly correlated with CD4+ cell decline, p24 antigen expression, and total HIV-1 DNA content of peripheral blood mononuclear cells (PBMC). Single-LTR HIV-1 DNA junctions were absent from PBMC containing other forms of HIV-1 DNA in four of nine non/slow progressors relative to 2 of 12 rapid progressors/AIDS patients. We conclude from our data that quantitative detection of single-LTR HIV-1 DNA junctions can be used as an early DNA marker of the transition from clinical latency to active replication in the peripheral blood.

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