title: A human T cell line established from a patient with Sézary syndrome. Application for assay of human interleukin 2 (IL-2).
abstract: A human T cell line, designated Sez 627, was established from a patient with Sézary syndrome. These clonal T cells have been cultured for more than 2 years in the presence of IL-2 without any antigen stimulation. The surface phenotype of Sez 627 was OKT3+, OKT4-, OKT8+, and Tac+, and infection with human T lymphotrophic virus type I (HTLV-I) was demonstrated by Southern blot hybridization analysis. In human IL-2 assay, Sez 627 cells were found to be superior to murine CTLL-2 cells with respect to their unresponsiveness to phorbol 12-myristate 13-acetate (PMA), and species specificity for human IL-2, as well as better cryopreservation, although they were less sensitive to IL-2 than CTLL-2 cells. Using Sez 627 cells, IL-2 production by lymphocytes from patients with systemic lupus erythematosus (SLE) was examined. Decreased IL-2 production was observed in the patients with active SLE but not in most patients with inactive SLE. These findings suggest that Sez 627 is a useful human T cell line for human IL-2 assay.
mesh_terms: D000911:Antibodies, Monoclonal / Q000276:immunology; D000954:Antigens, Surface / Q000032:analysis / Q000276:immunology; D002460:Cell Line; D006801:Humans; D007376:Interleukin-2 / Q000032:analysis* / Q000096:biosynthesis; D008180:Lupus Erythematosus, Systemic / Q000378:metabolism; D008213:Lymphocyte Activation; D008214:Lymphocytes / Q000378:metabolism; D010641:Phenotype; D011971:Receptors, Immunologic / Q000032:analysis; D015375:Receptors, Interleukin-2; D012751:Sezary Syndrome / Q000276:immunology*; D013601:T-Lymphocytes / Q000276:immunology*; D018127:Tumor Necrosis Factor Receptor Superfamily, Member 7
chemical_list: D000911:Antibodies, Monoclonal; D000954:Antigens, Surface; D007376:Interleukin-2; D011971:Receptors, Immunologic; D015375:Receptors, Interleukin-2; D018127:Tumor Necrosis Factor Receptor Superfamily, Member 7