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• W4387157066 abstract "The reservoir of HIV-infected cells that persist in the face of effective anti-retroviral therapy (ART) is the barrier to curing HIV infection. These long-lived CD4+ cells carry a functional provirus that can become activated upon immune stimulation. When ART is stopped, this leads to a rapid rebound in viremia. A variety of approaches are proposed to eliminate these cells, many dependent upon the expression of virus proteins. We are examining the use of cytotoxic immunoconjugates targeting the HIV envelope protein (Env) as a method to eradicate cells producing virus and have demonstrated that soluble CD4 enhances the cytotoxic effect of gp41-targeted immunoconjugates. Mechanisms include increased antigen exposure and greater internalization of the immunoconjugate. Here we have tested different protein forms of CD4 and the small molecule CD4-mimetic BNM-III-170 for their effects on cells expressing cell-surface Env. Effects studied include sensitization to immunoconjugate killing, cell surface antigen expression, viability, and virus secretion. The CD4 proteins and BNM-III-170 produced comparable effects in these Env-expressing cell lines, each sensitizing cells to cytotoxicity by anti-gp41 immunoconjugates. The results provide further evidence that low molecular weight CD4 mimetics produce biologic effects similar to those caused by soluble CD4 itself and suggest additional therapeutic uses for these molecules. IMPORTANCE HIV infection can be effectively treated to prevent the development of AIDS, but it cannot be cured. We have attached poisons to anti-HIV antibodies to kill the infected cells that persist even after years of effective antiviral therapy. Here we show that the killing of infected cells can be markedly enhanced by the addition of soluble forms of the HIV receptor CD4 or by mimics of CD4." @default.
• W4387157066 created "2023-09-30" @default.
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• W4387157066 date "2023-09-29" @default.
• W4387157066 modified "2023-09-30" @default.
• W4387157066 title "Soluble CD4 and low molecular weight CD4-mimetic compounds sensitize cells to be killed by anti-HIV cytotoxic immunoconjugates" @default.
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• W4387157066 doi "https://doi.org/10.1128/jvi.01154-23" @default.
• W4387157066 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37772823" @default.
• W4387157066 hasPublicationYear "2023" @default.
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