Interaction of thyrotropin-releasing hormone (TRH) and serotonin in cardiovascular control.

Abstract:

:Intravenous injection of the synthetic TRH analog, MK-771, to anesthetised cats raised the blood pressure by a central mechanism, i.e. by activating the outflow of sympathetic stimuli from the CNS to the periphery and raising the plasma concentration of adrenaline and noradrenaline. In contrast, noradrenaline in the CSF was lowered by intravenously injected MK-771. The concentration of 5-HT in the CSF was increased and the pressor action of the peptide was correspondingly enhanced by 5-HT antagonists. These findings suggest that the release of 5-HT into the CSF lowers blood pressure and thus reduces the hypertensive effect of MK-771. Methysergide acts synergistically with MK-771 to combat the sudden fall in pressure induced by acute hemorrhage in the anesthetised cat. Combination of the two drugs enhanced and accelerated recovery from this hypotensive state.

journal_name

Eur J Pharmacol

authors

Elam R,Bergmann F,Feuerstein G

doi

10.1016/0014-2999(88)90358-5

subject

Has Abstract

pub_date

1988-09-01 00:00:00

pages

19-25

issue

1

eissn

0014-2999

issn

1879-0712

pii

0014-2999(88)90358-5

journal_volume

154

pub_type

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