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  • Title: Interleukin 1 binding to its type I, but not type II receptor, modulates the in vivo acute phase response.
    Author: Oldenburg HS, Pruitt JH, Lazarus DD, Rogy MA, Chizzonite R, Lowry SF, Moldawer LL.
    Journal: Cytokine; 1995 Aug; 7(6):510-6. PubMed ID: 8580366.
    Abstract:
    Neutralizing monoclonal antibodies against the murine interleukin 1 (IL-1) type I (mAb 35F5) and type II receptor (mAb 4E2) were used to passively immunize mice prior to exogenous murine IL-1 alpha administration or a sterile-turpentine induced abscess. When mice were passively immunized with 35F5, the anorexia, weight loss and increased plasma acute phase protein levels in response to exogenous IL-1 alpha administration or a turpentine abscess were significantly attenuated. In contrast, passive immunization with 4E2 had only variable effects on food intake, body weight and the hepatic acute phase response in mice administered IL-1 alpha. In mice following a turpentine abscess, type II receptor blockade (4E2) either had no effect, or in some cases, actually increased the plasma IL-6 and acute phase protein responses. We conclude that in response to a turpentine abscess, the anorexia, weight loss and the induction of several hepatic acute phase reactants result in part from IL-1 binding to its type I receptor. Binding of IL-1 to the type II IL-1 receptor does not appear to be involved in the induction of these host nonspecific responses to inflammation.
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