alexa Primary role of interleukin-1 alpha and interleukin-1 beta in lipopolysaccharide-induced hypoglycemia in mice.
Oncology

Oncology

Journal of Cancer Science & Therapy

Author(s): Oguri S, Motegi K, Iwakura Y, Endo Y

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Abstract Within a few hours of its injection into mice, lipopolysaccharide (LPS) induces hypoglycemia and the production of various cytokines. We previously found that interleukin-1 alpha (IL-1 alpha), IL-1 beta, and tumor necrosis factor alpha (TNF-alpha) induce hypoglycemia and that the minimum effective dose of IL-1 alpha or IL-1 beta is about 1/1000 that of TNF-alpha. In the present study, we examined the contribution made by IL-1 to the hypoglycemic action of LPS. Nine other cytokines tested were all inactive at inducing hypoglycemia. LPS produced hypoglycemia in mice deficient in either IL-1 alpha or IL-1 beta but not in mice deficient in both cytokines (IL-1 alpha and -1 beta knockout [IL-1 alpha/beta KO] mice). IL-1 alpha, IL-1 beta, and TNF-alpha induced hypoglycemia in IL-1 alpha/beta KO mice, as they did in normal control mice. The LPS-induced elevation of serum cortisol was weaker in IL-1 alpha/beta KO mice than in control mice, and, in the latter, serum cortisol was markedly raised while blood glucose was declining. IL-1 alpha decreased blood glucose both in NOD mice (which have impaired insulin production) and in KK-Ay mice (insulin resistant). These results suggest that (i). cortisol may not be involved in mediating the resistance of IL-1 alpha/beta KO mice to the hypoglycemic action of LPS, (ii). as a mediator, IL-1 is a prerequisite for the hypoglycemic action of LPS, (iii). IL-1 alpha and IL-1 beta perform mutual compensation, and (iv). IL-1 plays a role as the primary stimulator of the many anabolic reactions required for the elaboration of immune responses against infection.
This article was published in Clin Diagn Lab Immunol and referenced in Journal of Cancer Science & Therapy

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