Abstract
1 Intravenous administration of apomorphine (1.25 to 20 microgram/kg) in the anaesthetized dog produced a dose-dependent decrease in blood pressure which was antagonized by haloperidol but not influenced by propranolol or atropine. 2 Intracarotid administration of apomorphine produced a systemic hypotension which was significantly smaller than that seen with intravenous injection. 3 Doses of apomorphine that caused a decrease in blood pressure on intravenous injection, had no effect on blood pressure or caused retching accompanied by an increase in blood pressure on intravertebral or intracisternal administration. The animals showed a marked hypotension on intravertebral or intracisternal injection of clonidine. 4 From these results it is concluded that the hypotension seen with intravenous apomorphine cannot be explained by a central site of action.
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Selected References
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- Antonaccio M. J., Robson R. D. L-dopa hypotension in dogs: evidence for mediation through 5-HT release. Arch Int Pharmacodyn Ther. 1974 Nov;212(1):89–102. [PubMed] [Google Scholar]
- Barnett A., Fiore J. W. Hypotensive effect of apomorphine in anesthetized cats. Eur J Pharmacol. 1971 Apr;14(2):206–208. doi: 10.1016/0014-2999(71)90214-7. [DOI] [PubMed] [Google Scholar]
- Buylaert W. A., Willems J. L., Bogaert M. G. Vasodilatation produced by apomorphine in the hindleg of the dog. J Pharmacol Exp Ther. 1977 Jun;201(3):738–746. [PubMed] [Google Scholar]
- Crumly H. J., Jr, Pinder R. M., Hinshaw W. B., Goldberg L. I. Dopamine-like renal and mesenteric vasodilation caused by apomorphine 6-propylnorapomorphine and 2-amino-6, 7-dihydroxy-1,2,3,4-tetrahydronaphthalene. Nature. 1976 Feb 19;259(5544):584–587. doi: 10.1038/259584a0. [DOI] [PubMed] [Google Scholar]
- Goldberg L. I. Cardiovascular and renal actions of dopamine: potential clinical applications. Pharmacol Rev. 1972 Mar;24(1):1–29. [PubMed] [Google Scholar]
- Laubie M., Schmitt H., Falq E. Dopamine receptors in the femoral vascular bed of the dog as mediators of a vasodilator and sympathoinhibitory effect. Eur J Pharmacol. 1977 Apr 7;42(3):307–310. doi: 10.1016/0014-2999(77)90299-0. [DOI] [PubMed] [Google Scholar]
- Long J. P., Heintz S., Cannon J. G., Kim J. Inhibition of the sympathetic nervous system by 5,6-dihydroxy-2-dimethylamino tetralin (M-7), apomorphine and dopamine. J Pharmacol Exp Ther. 1975 Feb;192(2):336–342. [PubMed] [Google Scholar]
- Stumpe K. O., Kolloch R., Higuchi M., Krück F., Vetter H. Hyperprolactinaemia and antihypertensive effect of bromocriptine in essential hypertension. Identification of abnormal central dopamine control. Lancet. 1977 Jul 30;2(8031):211–214. doi: 10.1016/s0140-6736(77)92832-x. [DOI] [PubMed] [Google Scholar]
- Willems J. L., Bogaert M. G. Dopamine-induced neurogenic vasodilatation in isolated perfused muscle preparation of the dog. Naunyn Schmiedebergs Arch Pharmacol. 1975;286(4):413–428. doi: 10.1007/BF00506655. [DOI] [PubMed] [Google Scholar]
- Willems J. L. Dopamine-induced inhibition of synaptic transmission in lumbar paravertebral ganglia of the dog. Naunyn Schmiedebergs Arch Pharmacol. 1973;279(2):115–126. doi: 10.1007/BF00503977. [DOI] [PubMed] [Google Scholar]