title: Phenotypic identification of memory cytolytic T lymphocytes in a subset of Lyt-2+ cells.
abstract: Murine peripheral Lyt-2+ T cells could be subdivided according to surface expression of the Pgp-1 glycoprotein into major (71%) Pgp-1- and minor (29%) Pgp-1+ subsets. A striking correlation was observed between Pgp-1 expression and enrichment for antigen-specific memory cytolytic T lymphocyte precursors (CTLp). After immunization with the male minor transplantation antigen H-Y, virtually all the H-Y-specific CTLp were found in the minor Pgp-1+ subset of Lyt-2+ cells. In addition, after alloimmunization the frequency of allospecific CTLp resistant to inhibition by anti-Lyt-2 antibody was markedly enriched within the Pgp-1+ cells, suggesting an enrichment for CTLp bearing high avidity antigen receptors. Taken together, these data suggest that surface Pgp-1 expression is stably acquired at the time of primary antigenic stimulation by virgin T cells. As such, Pgp-1 represents an important marker for identifying a subset of Lyt-2+ T cells with the quantitative and qualitative properties of memory CTLp.
mesh_terms: D000818:Animals; D000945:Antigens, Differentiation, T-Lymphocyte; D000950:Antigens, Ly / Q000032:analysis; D000954:Antigens, Surface / Q000032:analysis*; D005260:Female; D006182:H-Y Antigen / Q000276:immunology; D007114:Immunization; D007156:Immunologic Memory; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL / Q000276:immunology; D008811:Mice, Inbred DBA / Q000276:immunology; D010641:Phenotype; D011948:Receptors, Antigen, T-Cell / Q000276:immunology; D016201:Receptors, Lymphocyte Homing; D013602:T-Lymphocytes, Cytotoxic / Q000145:classification* / Q000276:immunology
chemical_list: D000945:Antigens, Differentiation, T-Lymphocyte; D000950:Antigens, Ly; D000954:Antigens, Surface; D006182:H-Y Antigen; D011948:Receptors, Antigen, T-Cell; D016201:Receptors, Lymphocyte Homing