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Cerebral and peripheral blood flow effects of TRH in the rat: a role of vagal nerves
Department of Physiology and Medical Biophysics, Biomedical Centre University of Uppsala, Box 572, S-75123 Uppsala, Sweden.
1989 (English)In: Peptides, ISSN 0196-9781, E-ISSN 1873-5169, Vol. 10, no 5, p. 933-938Article in journal (Refereed) Published
Abstract [en]

The cardiovascular effects of the IV infusion of TRH were studied in the rat. TRH tended to increase the MAP and markedly increased the CBF(tot) in the control group, in vagotomized animals and in methylatropine-pretreated rats. A marked vasodilation was noted in the pancreas, gastric mucosa, duodenum and cardiac muscle. This effect was turned to vasoconstriction, the heart excluded, in vagotomized animals. Muscarinic blockade attenuated the vasodilating effect of TRH in the duodenum and gastric mucosa. The results indicate that TRH elicits cerebral vasodilation and a partly nonmuscarinic parasympathetically mediated vasodilation in several gastrointestinal organs in parallel with a vasoconstriction which is unmasked by vagotomy.

Place, publisher, year, edition, pages
1989. Vol. 10, no 5, p. 933-938
National Category
Physiology
Identifiers
URN: urn:nbn:se:umu:diva-167524DOI: 10.1016/0196-9781(89)90171-xISI: A1989AZ03200005PubMedID: 2514418OAI: oai:DiVA.org:umu-167524DiVA, id: diva2:1388080
Available from: 2020-01-23 Created: 2020-01-23 Last updated: 2020-01-24Bibliographically approved

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Koskinen, Lars-Owe D.

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