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. 1992 Jul;66(7):4228–4232. doi: 10.1128/jvi.66.7.4228-4232.1992

Transcellular activation of the human immunodeficiency virus type 1 long terminal repeat in cocultured lymphocytes.

A Marcuzzi 1, J Weinberger 1, O K Weinberger 1
PMCID: PMC241226  PMID: 1602543

Abstract

One of the unexplained aspects of the progression of AIDS is that immunological abnormalities are detectable before CD4+ T-helper cell depletion occurs (A.R. Gruters, F.G. Terpstra, R. De Jong, C.J.M. Van Noesel, R.A.W. Van Lier, and F. Miedema, Eur. J. Immunol. 20:1039-1044, 1990; F. Miedema, A.J. Chantal-Petit, F.G. Terpstra, J.K.M.E. Schattenkerk, F. de Wolf, B.J.M. Al, M. Roos, J.M.A. Lang, S.A. Danner, J. Goudsmit, and P.T.A. Schellekens, J. Clin. Invest. 82:1908-1914, 1988; G.M. Shearer, D.C. Bernstein, K.S. Tung, C.S. Via, R. Redfield, S.Z. Salahuddin, and R.C. Gallo, J. Immunol. 137:2514-2521, 1986). In this report, we describe a mechanism by which human immunodeficiency virus type 1 (HIV-1)-infected cells can influence neighboring HIV-1-infected T lymphocytes and uninfected T cells as well. We have examined the interaction of T-cell and macrophage cell lines that are transfected with HIV-1 DNA by using cocultured lymphocytes. The HIV-1 constructs we used lack a functional pol gene and therefore do not produce infectious virus. Cocultivation results in the transcellular activation of the HIV long terminal repeat in the cocultured T cells. This transcellular activation is evident in as little as 3 h of cocultivation, at ratios of HIV-expressing cells to target cells as low as 1:1,000, and is dependent on the Tat-responsive element. The demonstration that a small number of HIV-expressing cells can affect a large number of uninfected bystander cells in a short period of time suggests a mechanism by which global immune dysfunction can precede the high prevalence of infected cells.

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Selected References

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