| Literature DB >> 2970975 |
Abstract
An H3-agonist, R alpha methylhistamine strongly relaxed isolated and perfused rabbit middle cerebral artery precontracted with K+. This vasodilatation was not antagonized by either mepyramine or cimetidine but was competitively antagonized by an H3-antagonist, a mixture of impromidine and cimetidine. Histamine activated the H3-sites in this artery since its concentration-response curve (obtained with mepyramine and cimetidine) was parallel to that of R alpha methylhistamine. Our data indicate that H3-sites could exist in the rabbit cerebral artery.Entities:
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Year: 1988 PMID: 2970975 DOI: 10.1016/0014-2999(88)90026-x
Source DB: PubMed Journal: Eur J Pharmacol ISSN: 0014-2999 Impact factor: 4.432