P-selectin (CD62) binds to subpopulations of human memory T lymphocytes and natural killer cells - PubMed (original) (raw)
P-selectin (CD62) binds to subpopulations of human memory T lymphocytes and natural killer cells
K L Moore et al. Biochem Biophys Res Commun. 1992.
Abstract
P-selectin (CD62) is a Ca(2+)-dependent lectin expressed on activated platelets and endothelium. Although P-selectin is known to function as a receptor for myeloid cells, previous studies indicated that P-selectin also bound to a subset of lymphocytes. Using a multi-color immunofluorescence assay we found that purified P-selectin bound to 12.2 +/- 4.1% of peripheral blood lymphocytes and that P-selectin could mediate adhesion of activated platelets to lymphocytes. A subpopulation of CD4+, CD8+, and CD16+ lymphocytes bound P-selectin. There was a marked preference for P-selectin binding to memory cells (CD45RO+) in both the CD4+ and CD8+ populations. Binding to all cell types was Ca(2+)-dependent and blocked by pretreatment of the cells with sialidase. These data suggest that P-selectin may play a role in the recruitment of specific lymphocyte populations to sites of inflammation.
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