Abstract
1. Doses of cocaine which cause specific or unspecific supersensitivity in cat spleen did not alter the blocking effect of phenoxybenzamine on the responses of isolated cat spleen strips to noradrenaline.
2. The same doses of cocaine did not increase the protection of α-adrenoceptors given by noradrenaline during a standard exposure to phenoxybenzamine.
3. It is concluded that cocaine does not change the affinity of the α-adrenoceptor for noradrenaline, and therefore changes in affinity are not responsible for the potentiating action of cocaine.
Full text
PDF




Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Davidson W. J., Innes I. R. Dissociation of potentiation of isoprenaline by cocaine from inhibition of uptake in cat spleen. Br J Pharmacol. 1970 May;39(1):175–181. doi: 10.1111/j.1476-5381.1970.tb09567.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Davidson W. J., Innes I. R. Lack of spare -adrenoceptors in cat spleen. Can J Physiol Pharmacol. 1972 Dec;50(12):1210–1213. doi: 10.1139/y72-176. [DOI] [PubMed] [Google Scholar]
- FURCHGOTT R. F., KIRPEKAR S. M., RIEKER M., SCHWAB A. ACTIONS AND INTERACTIONS OF NOREPINEPHRINE, TYRAMINE AND COCAINE ON AORTIC STRIPS OF RABBIT AND LEFT ATRIA OF GUINEA PIG AND CAT. J Pharmacol Exp Ther. 1963 Oct;142:39–58. [PubMed] [Google Scholar]
- Green R. D., 3rd, Fleming W. W. Agonist-antagonist interactions in the normal and supersensitive nictitating membrane of the spinal cat. J Pharmacol Exp Ther. 1967 May;156(2):207–214. [PubMed] [Google Scholar]
- Green R. D., 3rd, Fleming W. W. Analysis of supersensitivity in the isolated spleen of the cat. J Pharmacol Exp Ther. 1968 Aug;162(2):254–262. [PubMed] [Google Scholar]
- Innes I. R., Karr G. W. Protection against induction of supersensitivity to catecholamines by cocaine. Br J Pharmacol. 1971 Aug;42(4):603–610. doi: 10.1111/j.1476-5381.1971.tb07144.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Kalsner S., Nickerson M. Mechanism of cocaine potentiation of responses to amines. Br J Pharmacol. 1969 Mar;35(3):428–439. doi: 10.1111/j.1476-5381.1969.tb08284.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Lewis J. E., Miller J. W. The use of tritiated phenoxybenzamine for investigating receptors. J Pharmacol Exp Ther. 1966 Oct;154(1):46–55. [PubMed] [Google Scholar]
- MACMILLAN W. H. A hypothesis concerning the effect of cocaine on the action of sympathomimetic amines. Br J Pharmacol Chemother. 1959 Sep;14:385–391. doi: 10.1111/j.1476-5381.1959.tb00263.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
- MAXWELL R. A., PLUMMER A. J., POVALSKI H., SCHNEIDER F., COOMBS H. A comparison of some of the cardiovascular actions of methylphenidate and cocaine. J Pharmacol Exp Ther. 1959 Jul;126(3):250–257. [PubMed] [Google Scholar]
- Trendelenburg U. Mechanisms of supersensitivity and subsensitivity to sympathomimetic amines. Pharmacol Rev. 1966 Mar;18(1):629–640. [PubMed] [Google Scholar]
- Varma D. R., McCullough H. N. Dissociation of the supersensitivity to norepinephrine caused by cocaine from inhibition of H3-norepinephrine uptake in cold-stored smooth muscle. J Pharmacol Exp Ther. 1969 Mar;166(1):26–34. [PubMed] [Google Scholar]