title: Qualitative differences in effects of recombinant alpha-, beta- and gamma-interferons on human peripheral blood leukocytes in vitro.
abstract: The in vitro effects of bacteria-produced human interferons alpha 2, beta and gamma on several properties of peripheral blood leukocytes from different healthy donors were compared. Treatment with HuIFN-alpha 2 or HuIFN-beta resulted in inhibition of the proliferative response to phytohaemagglutinin and in closely parallel induction of 2'-5'-oligoadenylate synthetase activity. In contrast, HuIFN-gamma had no significant effect on these two activities. However, all three HuIFN were able to enhance natural killer cell cytotoxicity and the expression of HLA-DR surface antigens, with only quantitative variations from donor to donor. Similar results were observed with glycosylated recombinant hamster-cell-derived HuIFN-gamma and with natural HuIFN-gamma. These data demonstrate qualitative differences in the effects of HuIFN-gamma compared to those of HuIFN-alpha 2 or -beta on cells of the immune system.
mesh_terms: D015088:2',5'-Oligoadenylate Synthetase / Q000037:antagonists & inhibitors; D003602:Cytotoxicity, Immunologic; D004926:Escherichia coli / Q000235:genetics; D006680:HLA Antigens / Q000032:analysis; D006684:HLA-DR Antigens; D000949:Histocompatibility Antigens Class II / Q000032:analysis; D006801:Humans; D007370:Interferon Type I / Q000276:immunology*; D007371:Interferon-gamma / Q000276:immunology*; D007694:Killer Cells, Natural / Q000276:immunology; D007962:Leukocytes / Q000276:immunology*; D008213:Lymphocyte Activation; D011994:Recombinant Proteins / Q000276:immunology
chemical_list: D006680:HLA Antigens; D006684:HLA-DR Antigens; D000949:Histocompatibility Antigens Class II; D007370:Interferon Type I; D011994:Recombinant Proteins; D007371:Interferon-gamma; D015088:2',5'-Oligoadenylate Synthetase