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In vivo anti-inflammatory effects of the M20 IL-1 Inhibitor: II. Effects on serum reactants

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Biotherapy

Abstract

We have previously described an IL-1 Inhibitor derived from the M20 myelomoncytic cell line. This line also secretes several molecules of IL-1. We have shown that this factor is specific to IL-1in vitro, as well asin vivo. In vitro IL-1 induced proliferative responses of mouse thymocytes, human T cells and fibroblasts and IL-1 stimulated PGE2 secretion from fibroblasts, were all inhibited by the M20 IL-1 Inhibitor.In vivo, the IL-1 Inhibitor reduced parameters of acute inflammation such as fever, leukocytosis and local inflammation. This study describes additional effects of the M20 IL-1 Inhibitor on inflammatory serum reactants. Levels of corticosterone and fibrinogen were increased by injection of IL-1, and decreased by the IL-1 Inhibitor. IL-1 reduced zinc and iron plasma levels and elevated copper plasma levels. The M20 IL-1 Inhibitor reversed these changes in a dose dependent manner. Similar effects produced by IL-6 and TNF were unaffected by the M20 IL-1 Inhibitor. Our results indicate that the M20 IL-1 Inhibitor acts specifically on IL-1 induced responsesin vivo. Therefore we conclude that this IL-1 Inhibitor has a great potential as an anti-inflammatory agent.

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Abbreviations

IL-1:

Interleukin 1

IL-6:

Interleukin 6

IL-1ra:

Interleukin 1 receptor antagonist

TNF:

tumor necrosis factor

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Barak, V., Gorodetsky, R., Weidenfeld, J. et al. In vivo anti-inflammatory effects of the M20 IL-1 Inhibitor: II. Effects on serum reactants. Biotherapy 6, 271–277 (1993). https://doi.org/10.1007/BF01878356

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