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- W3204385476 abstract "Abstract BackgroundWe developed a personalized Monocyte-Derived Dendritic Therapy (MDDCT) for HIV-infected individuals on suppressive antiretroviral treatment and evaluated HIV-specific T-cell responses.MethodsPBMCs were obtained from 10 HIV + individuals enrolled in trial NCT02961829. Monocytes were differentiated into DCs using IFN-α and GM-CSF. After sequencing each patient’s HIV-1 Gag and determining HLA profiles, autologous Gag peptides were selected based on the predicted individual immunogenicity and used to pulse MDDCs. Three doses of the MDDCT were administered every 15 days. To assess immunogenicity, patients’ cells were stimulated in vitro with autologous peptides, and intracellular IL-2, TNF, and interferon-gamma (IFN-γ) production were measured in CD4 + and CD8 + T-cells. ResultsThe protocol of ex-vivo treatment with IFN-α and GM-CSF was able to induce maturation of MDDCs, as well as to preserve their viability for reinfusion. MDDCT administration was associated with increased expression of IL-2 in CD4 + and CD8 + T-cells at 15 and/or 30 days after the first MDDCT administration. Moreover, intracellular TNF and IFN-γ expression was significantly increased in CD4 + T-cells. The number of candidates that increased in vitro the cytokine levels in CD4 + and CD8 + T cells upon stimulation with Gag peptides from baseline to days 15 and from baseline to days 30 and days 120 after MDDCT was significant as compared to Gag unstimulated response. This was accompanied by an increasing trend in the frequency of polyfunctional T-cells over time, which was visible when considering both cells expressing two and three out of the three cytokines examined. ConclusionsMDDC has a mature profile, and this MDDCT promoted in-vitro T-cell immune responses in HIV-infected patients undergoing long-term suppressive antiretroviral treatment.NCT02961829: (Multi Interventional Study Exploring HIV-1 Residual Replication: a Step Towards HIV-1 Eradication and Sterilizing Cure, https://www.clinicaltrials.gov/ct2/show/NCT02961829, posted November 11 th , 2016)." @default.
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- W3204385476 date "2021-09-14" @default.
- W3204385476 modified "2023-10-16" @default.
- W3204385476 title "Immunogenicity of Personalized Dendritic-cell Therapy in HIV-1 Infected Individuals Under Suppressive Antiretroviral Treatment: Interim Analysis From a Phase II Clinical Trial." @default.
- W3204385476 doi "https://doi.org/10.21203/rs.3.rs-869990/v1" @default.
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