The release of spasmogenic substances from human chopped lung tissue and its inhibition

British Journal of Pharmacology
P J Piper, J L Walker

Abstract

1. Human lung tissue, passively sensitized with reaginic antibodies, released prostaglandins E(1), E(2) and F(2alpha) in addition to histamine and slow reacting substance (SRS-A), when exposed to the appropriate antigen. No rabbit aorta contracting substance (RCS) was detected.2. Experiments with rats and guinea-pigs showed that the release of RCS is not confined to anaphylactic reactions mediated by non-reaginic antibodies but may be a feature of anaphylaxis in guinea-pigs alone.3. Human lung tissue gently agitated with a blunt nylon rod liberated an E-type prostaglandin and RCS in addition to histamine and SRS-A.4. Human isolated bronchial muscle was contracted by RCS.5. Disodium cromoglycate antagonized the release of prostaglandins during anaphylaxis but not during agitation of human lung tissue, whereas indomethacin blocked the release of prostaglandins during agitation and anaphylaxis.6. The release of an E-type prostaglandin during anaphylaxis in human lung tissue, which inhibits the further release of histamine could be another example of the regulatory role of prostaglandins in body functions.

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Anaphylaxis

Anaphylaxis is a serious allergic reaction that is rapid in onset and may cause death.