In vitro selective elimination of HIV-infected cells from peripheral blood in AIDS patients by the immunotoxin DAB389CD4
| Autor: | J Martín-Serrano, Lola Folgueira, José Alcamí, A. R. Noriega, Emmanuel Lemichez, Patrice Boquet, Sonsoles Sánchez-Palomino, M.-A. Pedraza, Laín de Lera T |
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| Rok vydání: | 1998 |
| Předmět: |
Anti-HIV Agents
Cell Survival Recombinant Fusion Proteins Immunology HIV Core Protein p24 Lymphocyte proliferation Biology Virus Replication Peripheral blood mononuclear cell Virus Blood cell Proviruses Immunotoxin medicine Humans Immunology and Allergy Diphtheria Toxin Viability assay Cells Cultured Dose-Response Relationship Drug Immunotoxins HIV Virology Phenotype Infectious Diseases medicine.anatomical_structure CD4 Antigens Leukocytes Mononuclear RNA Viral Viral disease Viral load |
| Zdroj: | AIDS. 12:859-863 |
| ISSN: | 0269-9370 |
| Popis: | Objectives: To study the antiviral efficacy of the recombinant immunotoxin DAB389CD4 against wild-type strains of HIV and to analyse its potential toxicity in non-infected peripheral blood mononuclear cells (PBMC). Design and methods: PBMC from HlV-seropositive patients were cultured in the presence of DAB389CD4. After 30 days in culture, viral load was assessed by quantification of RNA levels in supernatants and HlV-specific polymerase chain reaction (PCR) was performed for measuring proviral DNA as an indicator of remaining virus in cells. To study the toxicity of DAB389CD4, PBMC from healthy donors were isolated and cell viability and lymphocyte proliferation were assessed after immunotoxin treatment. Results: DAB389CD4 presented a strong antiviral activity in five of the six primary isolates decreasing p24 production in cultures to undetectable levels and eliminating selectively HlV-infected cells as measured by HIV DNA-specific PCR. One viral isolate was resistant to DAB389CD4 treatment. The immunotoxin was active against both syncytial and non-syncytial HIV strains. DAB389CD4 was not toxic in non-infected PBMC as measured by different techniques: trypan blue exclusion, methyl thiazol tetrazolium oxidation, lymphocyte proliferation, and CD4 cell count. Conclusions: DAB389CD4 showed a strong antiviral and specific activity against primary HIV isolates by killing selectively HlV-infected cells without affecting non-infected cells. This antiviral effect produced the eradication of HIV in cultures and indicated the potential use of this drug as a new therapeutic tool in combination with antiretroviral drugs. This immunotoxin would be especially interesting in the context of the marginal populations of HIV-infected cells remaining after successful antiviral treatment. |
| Databáze: | OpenAIRE |
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