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THE PHARMACOLOGY OF ANAPHYLAXIS IN THE CHICKEN INTESTINE
Author(s) -
CHAND N.,
EYRE P.
Publication year - 1976
Publication title -
british journal of pharmacology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.432
H-Index - 211
eISSN - 1476-5381
pISSN - 0007-1188
DOI - 10.1111/j.1476-5381.1976.tb07680.x
Subject(s) - histamine , ileum , endocrinology , mepyramine , medicine , methysergide , acetylcholine , chemistry , anaphylaxis , pharmacology , receptor , biology , antagonist , immunology , allergy
1 The Schultz‐Dale phenomenon has been demonstrated in several circular smooth muscle strips of oesophagus, crop, duodenum, jejunum and ileum taken from young and adult domestic fowl sensitized actively to crystalline bovine albumin or horse plasma. 2 The ileal strips contract to acetylcholine, histamine, 5‐hydroxytryptamine (5‐HT), prostaglandins E 1 , E 2 , F 2α , bradykinin and bovine slow reacting substance of anaphylaxis (SRS‐A). Marked seasonal and individual variations in the responsiveness of gut tissues to these exogenous agonists were noted. 3 Antagonism of contractions to histamine by mepyramine suggests the existence of H 1 ‐histamine receptors in chicken ileum. Blockade of 5‐HT‐induced contractions by methysergide shows the preponderance of ‘D’‐musculotropic tryptamine receptors. 4 Failure of selective receptor antagonists of acetylcholine, histamine and 5‐HT to modify the Schultz‐Dale reaction suggests the nonparticipation of aminergic mechanisms in this reaction. 5 Partial to complete blockade of the Schultz‐Dale reaction by a prostaglandin receptor antagonist (polyphloretin phosphate, PPP); prostaglandin synthetase inhibitors (sodium meclofenamate and phenylbutazone); inhibitors of synthesis and release of histamine and SRS‐A (PR‐D‐92‐EA, M&B 22948, diethylcarbamazine citrate, and PPP) and an inhibitor of proteinases (aprotinin) strongly suggests the involvement of vasoactive lipids and polypeptides in the anaphylactic response of chicken ileum to specific antigen.