Title

Monocyte-Mediated Lysis of HIV-Infected Tumor Cells

ORCiD

Nejat Düzgüneş: 0000-0001-6159-1391

Document Type

Article

Publication Title

AIDS Research and Human Retroviruses

ISSN

0889-2229

Volume

6

Issue

8

DOI

10.1089/aid.1990.6.1005

First Page

1005

Last Page

1009

Publication Date

1-1-1990

Abstract

Peripheral blood monocytes (PBM) can selectively lyse malignant or virus-infected cells. We investigated the effects of target cell infection with HIV-1 on PBM cytolytic function. Cytokine-activated PBM lysed uninfected, HSV-1-infected or vaccinia virus-infected tumor cells, but did not lyse the same cell lines when infected with the human immunodeficiency virus type 1 (HIV-1). HIV did not impair PBM viability, and actinomycin D (Act D) pretreatment of HIV-infected target cells restored their susceptibility to PBM-mediated lysis. Either antibody to CD4 (Leu3a) or a recombinant vaccinia virus that induces expression of the HIV envelope protein, also inhibited target cell lysis by PBM. These studies indicate that CD4 can function as a mediator of PBM cytolytic function, and that target cell expression of the HIV-1 envelope protein may inhibit monocyte-mediated antitumor responses. © 1990, Mary Ann Liebert, Inc. All rights reserved.

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