EFFECTS OF SOME GUANIDINE DERIVATIVES ON NEUROMUSCULAR AND GANGLIONIC TRANSMISSION
Open Access
- 1 December 1962
- journal article
- research article
- Published by Wiley in British Journal of Pharmacology and Chemotherapy
- Vol. 19 (3), 414-426
- https://doi.org/10.1111/j.1476-5381.1962.tb01446.x
Abstract
The anticurare activity of some guanidine derivatives has been studied using the fowl sciatic nerve-gastrocnemius muscle preparation and the cat sciatic nerve-gastrocnemius and tibialis anterior muscle preparations. Among the compounds tested, and in decreasing order of potency, were NN-dimethylguanidine, N-methylguanidine, guanidine and N-aminoguanidine which antagonized or prevented tubocurarine or gallamine triethiodide-induced paralysis. None of the derivatives antagonized the effects of suxamethonium or decamethonium. NN-Dimethylguanidine, N-methylguanidine and guanidine antagonized or prevented the curare-like effects of magnesium without altering the activity of hemicholinium. At high doses NN-dimethylguanidine induced a decamethonium-like spastic paralysis in the fowl sciatic nerve-gastrocnemius muscle preparation. NN-Diethylguanidine, however, induced a tubocurarine-like flaccid paralysis. The derivatives possessing anticurare activity were also studied using the cat superior cervical ganglion-nictitating membrane preparation to check their possible effects against ganglionic blocking agents. Only guanidine antagonized or prevented the effects of hexamethonium, pentolinium and mecamylamine; it had no effect on the actions of pempidine and chlorisondamine. NN-Diethylguanidine was the only compound in the series to show a ganglionic blocking action.Keywords
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