Central autonomic effects of prostaglandin F2 alpha on the cardiovascular system of the dog

British Journal of Pharmacology
H A LaveryG C Scroop

Abstract

1. Prostaglandin F(2alpha) infused into the vertebral artery of the anaesthetized greyhound in doses which had no effect when given intravenously ((8-64 ng/kg)/min) caused an increase in blood pressure and heart rate.2. This response was not significantly altered by beta-adrenoceptor blockade with propranolol (10 mg i.v.) or by cervical cord section at C(4-6).3. The tachycardia was abolished and the pressor response greatly reduced by vagotomy or atropine (250 mug/kg i.v.).4. The pressor response which remained after vagotomy was abolished by subsequent sympathetic blockade with bethanidine (2-3 mg/kg i.v.) or bretylium (10 mg/kg i.v.).5. In contrast to the effects of propranolol or cervical cord section bethanidine (4-5 mg/kg i.v.) or bretylium (10 mg/kg i.v.) significantly reduced blood pressure and heart rate responses to intravertebral prostaglandin F(2alpha). This result suggests that bethanidine and bretylium have some central actions.6. It is concluded that the cardiovascular effects of intravertebral infusions of prostaglandin F(2alpha) are mediated by the autonomic nervous system and that the preferential pathway is withdrawal of vagal tone to the heart.

References

Jan 1, 1969·Physiological Reviews·E W Horton
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Jul 1, 1970·British Journal of Pharmacology·H A LaveryG C Scroop
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Jul 1, 1963·The Journal of Surgical Research·R SHABETAIO HURLBURT
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Citations

Jan 28, 1983·European Journal of Pharmacology·E K Chiu, J S Richardson
Jun 1, 1973·Prostaglandins·W FörsterP Mentz
Aug 1, 1983·Prostaglandins, Leukotrienes, and Medicine·W SziegoleitW Förster
Jun 1, 1985·Prostaglandins, Leukotrienes, and Medicine·U FörstermannG Hertting
Jan 1, 1983·General Pharmacology·E K Chiu, J S Richardson
Mar 1, 1981·Brain Research Bulletin·G FeuersteinD M Jacobowitz
Apr 1, 1972·British Journal of Pharmacology·F KaticR D Lowe
Sep 1, 1980·Acta Pharmacologica Et Toxicologica·E L PuistoP Eränkö

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