Abstract

Hyperbaric oxygenation (HBO) has an immunosuppressive effect. The possible mechanisms of this immunosuppressive effect were assessed by determining the production of interleukin-1 (IL-1), interleukin-6 (IL-6), and prostaglandin E2 (PGE2), as well as phagocytosis by splenic macrophages from HBO-treated mice. Although HBO treatment did not have any significant effect on IL-6 production and phagocytotic activity, a marked decrease in IL-1 production and a significant decrease in PGE2 production were observed. These results suggest that the reduction of IL-1 production may play an important role in the immunosuppressive effect of HBO.

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