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- W1490502914 abstract "Accumulating evidence indicates that immune impairment in persistent viral infections could lead to T-cell exhaustion. To evaluate the potential contribution of induction of negative costimulatory molecules to impaired T-cell responses, we primed naïve T cells with mature monocyte-derived dendritic cells (MDDCs) pulsed with HIV-1 in vitro. We used quantitative real-time polymerase chain reaction and flow cytometry, respectively, to compare the gene and surface-protein expression profiles of naïve T cells primed with HIV-pulsed or mock-pulsed DCs. We detected elevated expressions of negative costimulatory molecules, including lymphocyte activation gene-3 (LAG-3), CD160, cytolytic T-lymphocyte antigen-4 (CTLA-4), T-cell immunoglobulin mucincontaining domain-3 (TIM-3), programmed death-1 (PD-1) and TRAIL (tumor necrosis-factor-related apoptosis-inducing ligand) in T cells primed by HIV-pulsed DCs. The PD-1+ T-cell population also coexpressed TIM-3, LAG-3, and CTLA-4. Interestingly, we also found an increase in gene expression of the transcriptional repressors Blimp-1 (B-lymphocyte-induced maturation protein-1) and Foxp3 (forkhead transcription factor) in T-cells primed by HIV-pulsed DCs; Blimp-1 expression was directly proportional to the expression of the negative costimulatory molecules. Furthermore, levels of the effector cytokines interleukin-2, tumor necrosis factor-α and interferon-γ, and perforin and granzyme B were decreased in T-cell populations primed by HIV-pulsed DCs. In conclusion, in vitro priming of naïve T-cells with HIV-pulsed DC leads to expansion of T cells with coexpression of a broad array of negative costimulatory molecules and Blimp-1, with potential deleterious consequences for T-cell responses." @default.
- W1490502914 created "2016-06-24" @default.
- W1490502914 creator A5025226467 @default.
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- W1490502914 creator A5080851422 @default.
- W1490502914 creator A5089710137 @default.
- W1490502914 date "2010-11-17" @default.
- W1490502914 modified "2023-10-15" @default.
- W1490502914 title "Expression of a Broad Array of Negative Costimulatory Molecules and Blimp-1 in T Cells following Priming by HIV-1 Pulsed Dendritic Cells" @default.
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- W1490502914 doi "https://doi.org/10.2119/molmed.2010.00175" @default.
- W1490502914 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3060986" @default.
- W1490502914 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/21103670" @default.
- W1490502914 hasPublicationYear "2010" @default.
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