| Literature DB >> 6197124 |
Abstract
Propranolol-resistant neurogenic relaxation persisted in (carbachol-contracted) guinea-pig tracheae already relaxed by supramaximal concentrations of vasoactive intestinal polypeptide (VIP). Also, VIP relaxed preparations that were under neurogenic inhibition. In hilus bronchi, about 60% of a neurogenic contraction was atropine-resistant. (Arg5, D-Trp7.9) SP 5-11 specifically antagonized this contraction and those produced by exogenous substance P. Substance P, but not VIP, seems to be involved in nerve-mediated effects on guinea-pig airway tone.Entities:
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Year: 1983 PMID: 6197124 PMCID: PMC2044903 DOI: 10.1111/j.1476-5381.1983.tb09999.x
Source DB: PubMed Journal: Br J Pharmacol ISSN: 0007-1188 Impact factor: 8.739