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The influence of muscarinic and prostaglandic mechanisms on regional cerebral and peripheral blood flows and on the vascular effects of thyrotropin releasing hormone (TRH).
Department of Physiology and Medical Biophysics, Biomedical Centre, University of Uppsala; Department of Neurosurgery, University Hospital, Umeå; Department of Biomedicine, National Defence Research Establishment, Umeå, Sweden.
1994 (English)In: Acta Physiologica Scandinavica, ISSN 0001-6772, E-ISSN 1365-201X, Vol. 152, no 4, p. 399-406Article in journal (Refereed) Published
Abstract [en]

TRH has pronounced vascular effects. The final transmitter mechanisms of these effects are not fully understood. The present study was conducted in order to elucidate whether these effects are mediated by prostaglandic or muscarinic mechanisms. Muscarinic blockade augmented the vasoconstricting- and pressor effect of TRH; vasodilation in the brain was attenuated only in the caudate nucleus. Indomethacin provoked a decrease in regional cerebral blood flow and in the gastric mucosal blood flow. No effect of indomethacin was observed on the vascular effects of TRH. It is concluded that the cerebral vasodilating and peripheral vasoconstricting effects of TRH are not mediated by prostaglandins. Muscarinic mechanisms are involved in the vasodilating effect of TRH only in the caudate nucleus.

Place, publisher, year, edition, pages
1994. Vol. 152, no 4, p. 399-406
National Category
Physiology
Identifiers
URN: urn:nbn:se:umu:diva-167527DOI: 10.1111/j.1748-1716.1994.tb09822.xISI: A1994PY72900006PubMedID: 7701940OAI: oai:DiVA.org:umu-167527DiVA, id: diva2:1388085
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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