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- W1981036391 abstract "Summary Human T‐lymphotropic virus 1 (HTLV‐1) can cause HTLV‐1‐associated myelopathy/tropical spastic paraparesis (HAM/TSP). The objective of this study was to gain insight into the pathogenesis of HAM/TSP by focusing on the CD8 + T‐cell response. Twenty‐three HTLV‐1‐seronegative controls (SC), 29 asymptomatic HTLV‐1 carriers (AC) and 48 patients with HAM/TSP were enrolled in the study. We evaluated the production of interferon‐γ (IFN‐γ) in peripheral blood mononuclear cells stimulated with Tax overlapping peptides, the expression of genes related to the CD8 + cytotoxic T‐cell response, the frequency of CD4 + Foxp3 + cells and of dendritic cells, and the HTLV‐1 provirus load (PVL). The frequency of cells producing IFN‐γ in response to Tax 161–233, but not to Tax 11–19, discriminated patients with HAM/TSP from AC. The increased pro‐inflammatory response observed in patients with HAM/TSP was shared by AC with a high PVL, who also exhibited lower levels of granzyme H mRNA in unstimulated CD8 + T cells than AC with a low PVL. Patients with HAM/TSP showed higher frequencies of CD4 + Foxp3 + cells and lower frequencies of plasmacytoid dendritic cells (pDC) than AC. Our findings are consistent with a model in which HTLV‐1, along with the host genetic background, drives quantitative and qualitative changes in pDC and CD4 + Foxp3 + cells that lead to a predominance of inflammatory responses over lytic responses in the CD8 + T‐cell response of individuals predisposed to develop HAM/TSP." @default.
- W1981036391 created "2016-06-24" @default.
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- W1981036391 date "2009-08-04" @default.
- W1981036391 modified "2023-10-16" @default.
- W1981036391 title "IFN-γ production in response to Tax 161-233, and frequency of CD4<sup>+</sup> Foxp3<sup>+</sup>and Lin<sup>−</sup> HLA-DR<sup>high</sup> CD123<sup>+</sup>cells, discriminate HAM/TSP patients from asymptomatic HTLV-1-carriers in a Peruvian population" @default.
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- W1981036391 doi "https://doi.org/10.1111/j.1365-2567.2009.03082.x" @default.
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