PD-1 expression defines two distinct T-cell sub-populations in follicular lymphoma that differentially impact patient survival

Abstract excerpt

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...

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