title: Impaired alpha-interferon production and natural killer activity in blood mononuclear cells in myelodysplastic syndromes.
abstract: The producibility of interferon (IFN)-alpha, which indicates one of the functions of large granular lymphocytes (LGL), was impaired at a high frequency in myelodysplastic syndrome (MDS) patients. However, IFN-alpha production in refractory anaemia, which is a subtype of MDS, was almost normal. In contrast, abnormality has not been observed in either proliferative response or the production of IFN-gamma of T-cells by stimulation with PHA. NK activity of peripheral blood mononuclear cells (PBMC) from MDS patients was generally low and was not augmented by IFN-alpha treatment. These results indicate that, in addition to the abnormality at the level of haematopoietic tissues, LGL among PBMC may be impaired in MDS patients.
mesh_terms: D000328:Adult; D000368:Aged; D000954:Antigens, Surface; D003602:Cytotoxicity, Immunologic / Q000187:drug effects; D005260:Female; D006801:Humans; D007113:Immunity, Innate / Q000187:drug effects; D007370:Interferon Type I / Q000096:biosynthesis* / Q000494:pharmacology; D007694:Killer Cells, Natural / Q000145:classification / Q000276:immunology*; D007958:Leukocyte Count; D008213:Lymphocyte Activation; D008297:Male; D008875:Middle Aged; D009190:Myelodysplastic Syndromes / Q000503:physiopathology*; D013601:T-Lymphocytes / Q000276:immunology
chemical_list: D000954:Antigens, Surface; D007370:Interferon Type I