Use of Steroidal Antiinflammatory Drug Provides Further Evidence for a Potential Role of PAF-Acether in Bronchial Anaphylaxis

Abstract
We presently demonstrate that PAF-acether (1-O-alkyl-2–O-acetyl-sn-glycerol-3-phosρhoryl-choline) is formed by sensitized guinea pig lungs upon in vitro antigenic challenge. Pretreatment of the animals with a steroidal antiinflammatory drug, budesonide, almost totally suppresses this biosynthesis. Since budesonide inhibits the anaphylactic bronchoconstriction in actively sensitized guinea pigs, these data strongly support the assumption that PAF-acether is a mediator of bronchial anaphylaxis.