title: Age-related changes in cell surface antigens of preleukemic AKR thymocytes.
abstract: Thymocytes from preleukemic AKR mice aged 5-6 mo have an altered pattern of cell surface antigens. The expression of four MuLV-related antigens on the cell surface (GIX, GCSA, gp70, p30) is markedly increased in comparison to 2-mo-old AKR mice and approximates the heightened levels of these antigens found on thymic leukemia cells. H-2 and Thy-1 alloantigens also show characteristic modifications in relation to age and leukemia development. In contrast to the high Thy-1/low H-2 levels on 2-mo-old AKR thymocytes, thymocytes from 6-mo-old mice and thymic leukemia cells frequently show a low Thy-1/high H-2 surface phenotype. As thymocytes from mouse strains with a low incidence of leukemia do not show these changes, they appear to represent a stage in the conversion of normal cells to leukemia cells.
mesh_terms: D000375:Aging; D000818:Animals; D000951:Antigens, Neoplasm / Q000032:analysis; D000956:Antigens, Viral / Q000032:analysis; D006649:Histocompatibility Antigens; D007519:Isoantigens / Q000032:analysis; D009052:Leukemia Virus, Murine / Q000276:immunology; D007942:Leukemia, Experimental / Q000276:immunology*; D051379:Mice; D008806:Mice, Inbred AKR / Q000276:immunology*; D013499:Surface Properties; D013601:T-Lymphocytes / Q000276:immunology; D013950:Thymus Gland / Q000276:immunology*; D014764:Viral Proteins / Q000276:immunology
chemical_list: D000951:Antigens, Neoplasm; D000956:Antigens, Viral; D006649:Histocompatibility Antigens; D007519:Isoantigens; D014764:Viral Proteins