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- W2014789164 abstract "To determine the biological and clinical relevance of programmed death 1 (PD-1) in follicular lymphoma (FL), we characterized PD-1(+) T-cell subsets and assessed their biological function as well as potential clinical impact. We found that PD-1 is expressed on intratumoral CD4(+) T cells with both bright and dim intensity, representing two different sub-populations of cells. By immunohistochemistry, we found that CD4(+)PD-1(high) T cells predominantly reside in the lymph node follicles, while PD-1(low) T cells are mainly located in an interfollicular pattern. Intratumoral CD4(+)PD-1(high) T cells have a TFH cell phenotype, express CXCR5, secrete IL-21 and are BCL-6 positive with no TIM-3 expression. In contrast, CD4(+)PD-1(low) T cells have an exhausted phenotype, express TIM-3 and do not express BCL-6 and CXCR5. Functionally, CD4(+)PD-1(high) T cells actively supported B-cell growth, while CD4(+)PD-1(low) T cells displayed a reduced cytokine production and cell-signal transduction. Clinically, we observed that the numbers of CD4(+) or CD8(+)PD-1(low) T cells significantly correlate with a reduced overall survival in FL patients (P=0.007 and 0.04 respectively; n=32). In contrast, the number of CD4(+)PD-1(high) T cells was not associated with patient outcome. Taken together, these results indicated that PD-1 expression defines two sub-populations with distinct functions that differentially impact patient outcome in FL." @default.
- W2014789164 created "2016-06-24" @default.
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- W2014789164 date "2015-02-20" @default.
- W2014789164 modified "2023-10-17" @default.
- W2014789164 title "PD-1 expression defines two distinct T-cell sub-populations in follicular lymphoma that differentially impact patient survival" @default.
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- W2014789164 doi "https://doi.org/10.1038/bcj.2015.1" @default.
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