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Stimulation of ACTH release by human interleukin-1 beta, but not by interleukin-1 alpha, in conscious, freely-moving rats
Authors:A Uehara  P E Gottschall  R R Dahl  A Arimura
Abstract:Ever since two distinct molecules of human interleukin-1 (termed interleukin-1 alpha and interleukin-1 beta) were cloned, sequenced and expressed, it has been a matter of investigation whether these two forms of interleukin-1 possess an identical spectrum of biological activities. Our current studies of interleukin-1 and its involvement in the hypothalamic-pituitary-adrenal axis have indicated that there is a clear-cut differential response to interleukin-1 alpha and interleukin-1 beta. The intravenous injection of human recombinant interleukin-1 beta significantly increased the plasma levels of adrenocorticotropic hormone in a dose-related manner, whereas interleukin-1 alpha did not. This observation suggests for the first time that the two members of the interleukin-1 family may have a different spectrum of biological actions.
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