title: The effect of HLA and insulin-dependent diabetes mellitus on the secretion levels of tumour necrosis factors alpha and beta and gamma interferon.
abstract: Tumour necrosis factors alpha and beta (TNF-alpha and TNF-beta) and gamma interferon (IFN-gamma) were measured by ELISA in the supernatants of phytohaemagglutinin (PHA)-activated peripheral blood mononuclear cells (PBMNC) from 98 individuals (60 controls and 38 patients with insulin-dependent diabetes mellitus [IDDM]). The PBMNC were incubated with varying concentrations of PHA (0, 1, 5, and 10 micrograms/ml) for 72 h. In our population study we observed a correlation between the levels of secretion of TNF-alpha and IFN-gamma but not TNF-beta. The complete data set was analysed by non-parametric tests, and no associations with HLA phenotypes existed. Reduced levels of TNF-beta, but not TNF-alpha or IFN-gamma, secretion were found in IDDM patients stimulated with 1 and 5 micrograms/ml of PHA (P = 0.001 and 0.02 respectively). None of the lymphokine secretion levels at any PHA concentration correlated with particular HLA phenotypes. Analysis of the natural log-transformed data indicated that only for the TNF-beta levels (at 5 micrograms/ml PHA) could subjects be divided into high and low secretors, which also did not correlate with a particular HLA-B or -DR antigen.
authors: Department of Immunology, London Hospital Medical College, UK.
authors: J A
authors: JA
authors: Sachs
authors: C E
authors: CE
authors: Whichelow
authors: G A
authors: GA
authors: Hitman
authors: M
authors: M
authors: Niven
authors: H
authors: H
authors: Thode
authors: A
authors: A
authors: Meager
mesh_terms: D000328:Adult; D003922:Diabetes Mellitus, Type 1 / Q000097:blood / Q000276:immunology*; D005260:Female; D006680:HLA Antigens / Q000032:analysis*; D006801:Humans; D066298:In Vitro Techniques; D007371:Interferon-gamma / Q000378:metabolism*; D007963:Leukocytes, Mononuclear / Q000187:drug effects / Q000378:metabolism; D008233:Lymphotoxin-alpha / Q000378:metabolism*; D008297:Male; D010835:Phytohemagglutinins / Q000494:pharmacology; D014409:Tumor Necrosis Factor-alpha / Q000378:metabolism*
chemical_list: D006680:HLA Antigens; D008233:Lymphotoxin-alpha; D010835:Phytohemagglutinins; D014409:Tumor Necrosis Factor-alpha; D007371:Interferon-gamma