title: Determination of cell-free interleukin 2 receptor level in the serum of normal animals and of animals bearing IL-2 receptor positive tumours with high or low metastatic capacity.
abstract: Serum levels of cell-free interleukin-2 receptors were elevated above normal in mice bearing the IL-2R positive T-cell lymphoma Eb or its highly metastatic variant ESb. Although ESb cells expressed less IL-2R molecules than Eb cells on their cell surface, serum receptor levels were raised more quickly in ESb than in Eb tumour bearing animals. Elevated IL-2R serum levels were a sensitive tumour marker in animals bearing the aggressive variant ESb but not in animals bearing the low metastatic line Eb. Peritoneal ascites tumour-bearing animals had higher serum IL-2R levels than corresponding animals with subcutaneously growing tumours. Thus, serum IL-2R levels in tumour-bearing animals were dependent on the tumour line and influenced by the site and mode of tumour growth.
mesh_terms: D000818:Animals; D002460:Cell Line; D007700:Kinetics; D008223:Lymphoma / Q000097:blood*; D051379:Mice; D008811:Mice, Inbred DBA; D009362:Neoplasm Metastasis; D009368:Neoplasm Transplantation; D011948:Receptors, Antigen, T-Cell / Q000032:analysis*; D011971:Receptors, Immunologic / Q000032:analysis*; D015375:Receptors, Interleukin-2; D013601:T-Lymphocytes / Q000032:analysis*
chemical_list: D011948:Receptors, Antigen, T-Cell; D011971:Receptors, Immunologic; D015375:Receptors, Interleukin-2