Abstract:
:Lymphocytes from normal individuals with the histocompatibility antigens HLA-B8 and DR3 have impaired proliferative responses when stimulated with suboptimal concentrations of mitogens. We have previously shown that an important factor in the impaired response is a failure to produce normal quantities of interleukin-2 (IL-2). To examine the mechanism of decreased responsiveness further, we measured interleukin-1 (IL-1) production of low responder subjects compared with controls. The peripheral blood mononuclear cells of five low responder individuals with HLA-B8/DR3 stimulated with 0.05 micrograms/ml of phytohaemagglutinin (PHA) accumulated only 0.036 U/ml of IL-1 compared with 0.32 U/ml for normal responders. There was a highly significant correlation between the PHA-stimulated IL-1 concentration at 12 h and the subsequent IL-2 concentration at 48 h(r = 0.89, P less than 0.0001) suggesting a role of decreased IL-1 production in the impaired response. A study of unfractionated or column-fractionated culture supernatants revealed no evidence that the decreased IL-1 activity in the supernatants of low responder subjects was related to increased IL-1 inhibitor concentrations. These results suggest that impaired IL-2 production and lymphocyte proliferation in healthy subjects with HLA-B8/DR3 may be mediated at least in part by decreased IL-1 production, and implicates a defect of a very early event in lymphocyte activation.
journal_name
Clin Exp Immunoljournal_title
Clinical and experimental immunologyauthors
Hashimoto S,Michalski JP,Berman MA,McCombs Cdoi
10.1111/j.1365-2249.1990.tb05183.xsubject
Has Abstractpub_date
1990-02-01 00:00:00pages
227-32issue
2eissn
0009-9104issn
1365-2249journal_volume
79pub_type
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