| Literature DB >> 6251201 |
P Blandina, R Fantozzi, P F Mannaioni, E Masini.
Abstract
1. Histamine secretion from rat mast cells occurs in the presence of nanomolar concentrations of acetylcholine. 2. Intact glycolytic and oxidative metabolism is required for the acetylcholine-induced histamine secretion. Removal of extracellular glucose, hypoxia, cyanide and monoiodoacetate almost completely inhibit the secretion. 3. The secretion of histamine is dependent on the extracellular H ion concentration and is blocked when the cells are exposed to Na-deficient media. 4. The order of potency of cholinrgic agonists in evoking the secretion of histamine is oxotremorine > acetylcholine > choline > carbamycholine > nicotine. 5. Atropine competitively blocks the acetylcholine-induced histamine secretion, indicating the presence of cholinergic muscarinic receptors on mast cells. 6. Dibutyryl cyclic AMP and adrenaline inhibit the acetylcholine-induced histamine secretion, indicating a regulatory function afforded by cyclic nucleotides in the cholinergic histamine release.Entities:
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Year: 1980 PMID: 6251201 PMCID: PMC1279398 DOI: 10.1113/jphysiol.1980.sp013205
Source DB: PubMed Journal: J Physiol ISSN: 0022-3751 Impact factor: 5.182