title: Interleukin-2 correction of defective in vitro T-cell mitogenesis in patients with common varied immunodeficiency.
abstract: We studied the ability of phytohemagglutinin (PHA) and two anti-T-cell monoclonal antibodies, OKT3 and Pan T2, to induce interleukin-2 (IL2) production and proliferation in peripheral blood lymphocytes (PBL) from 14 patients with combined varied immunodeficiency (CVI). The median values of endogenous IL2 produced by mitogen-stimulated PBL was significantly lower in patients than controls irrespective of the mitogen used. The patients, taken as a group, had a significantly decreased in vitro PBL response to mitogen stimulation when compared to controls. With the addition of a highly purified human IL2 preparation, the proliferative response in the majority of patients was significantly improved with all mitogens. Three patient groups could be distinguished: Group A (3/14) had full restoration of proliferative response with the addition of IL2, Group B (5/14) had partial restoration, and Group C (6/14) had no significant response. The monoclonal antibody, Pan T2, recognized a T-cell proliferative defect in 5 of 14 patients which neither PHA nor OKT3 recognized. This was not significantly corrected by the addition of IL2. This T-cell proliferative defect correlated with the lack of B-cell proliferation and immunoglobulin production in response to B-cell mitogens in three-fourths of the patients assayed. These data show that CVI patients are a heterogeneous group but have in common a decreased in vitro production of IL2 resulting in a proliferative defect which is correctable at least in part, in vitro, in the majority by the addition of purified IL2.
mesh_terms: D000293:Adolescent; D000328:Adult; D000361:Agammaglobulinemia / Q000276:immunology*; D000911:Antibodies, Monoclonal / Q000502:physiology; D000921:Antibody-Producing Cells / Q000276:immunology; D001402:B-Lymphocytes / Q000276:immunology; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D017098:IgA Deficiency; D017099:IgG Deficiency; D007376:Interleukin-2 / Q000096:biosynthesis / Q000502:physiology*; D008213:Lymphocyte Activation; D008297:Male; D008875:Middle Aged; D008934:Mitogens / Q000494:pharmacology; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D000911:Antibodies, Monoclonal; D007376:Interleukin-2; D008934:Mitogens