title: Human T cell subsets.
abstract: Several monoclonal antibodies (mAbs) demonstrate further heterogeneity of CD4 and CD8. Within CD4, two major subsets can be identified with helper/inducer and suppressor/inducer functions. It is argued that suppressor/inducers, identified by CD45R mAbs, are immature or virgin T cells and therefore respond poorly to recall antigens. Helper/inducers are CD45R negative but express the UCHL1 antigen, which appears to be part of CD45. These cells respond well to recall antigens and are therefore mature or memory T cells. Several antigens not related to CD45, such as 4B4, Leu8, TQ1 and 9.3, identify functionally distinct subsets rather than stages of T cell maturation.
mesh_terms: D000945:Antigens, Differentiation, T-Lymphocyte; D000954:Antigens, Surface / Q000276:immunology*; D006801:Humans; D013601:T-Lymphocytes / Q000145:classification* / Q000276:immunology; D006377:T-Lymphocytes, Helper-Inducer / Q000276:immunology; D050378:T-Lymphocytes, Regulatory / Q000276:immunology
chemical_list: D000945:Antigens, Differentiation, T-Lymphocyte; D000954:Antigens, Surface