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Involvement of central cholinoceptors in metrazol-induced convulsions

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Abstract

Atropine sulphate (10 mg/kg IP) afforded 90% protection against clonic convulsions induced by standard doses of metrazol (80 mg/kg SC) in mice, whereas atropine methonitrate (10 mg/kg IP) did not offer any protection. Furthermore, physostigmine (1 mg/kg IP) caused recurrence of convulsions in atropinzed metrazol-treated mice and converted the subconvulsive dose of metrazol (40 mg/kg SC) into a 100% convulsive dose. However, neostigmine (1 mg/kg IP) did not antagonize the protection afforded by atropine sulphate against metrazol. The results of the study suggest an involvement of central cholinergic mechanisms in metrazol-induced convulsions.

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References

  • bebbington, A., brimblecombe, R. W.: Muscarinic receptors in the peripheral and central nervous system. Adv. Drug. Res. 2, 143–172 (1965)

    Google Scholar 

  • Bhattacharya, S. K.: Role of brain monoamines in pentylenetetrazol convulsions in mice. Indian. J. Pharmacol. 8, 141–144 (1976)

    Google Scholar 

  • Brimblevombe, R. Y., Green, D. M., Inch, T. D., Thompson, P. B. J.: The significance of difference in the potency of enantiomers of antiacetylcholine drugs. J. Pharm. Pharmacol. 23, 745–757 (1971)

    Google Scholar 

  • Brimblecombe, R. W., Green, D. M., Stratton, J. A., Thompson, P. B. J.: The protective actions of some anticholinergic drugs in sarin poisoning. Brt. J. Pharmacol. 39, 822–830 (1970)

    Google Scholar 

  • Burgen, A. S. V., Hikley, C. R., Young, J. M.: The properties of muscarinic receptors in mammalian cerebral cortex. Br. J. Pharmacol. 51, 279–285 (1974)

    Google Scholar 

  • Inch, T. D., Green, D. M., Thompson, P. B. J.: The central and peripheral activities of antiacetylcholine drugs. Some concepts of practical relevance. J. Pharm. Pharmacol. 25, 359–370 (1973)

    Google Scholar 

  • Lessin, A. W., Parkes, M. W.: The effects of reserpine and other agents upon leptazol convulsions in mice. Br. J. Pharmacol. 14, 108–111 (1959)

    Google Scholar 

  • Lewis, J. J.: Rauwolfia derivatives. In: Physiological pharmacology, W. S. Root, F. G. Hoffman, eds., pp. 479–536. New York: Academic 1963

    Google Scholar 

  • Loeb, C., Magni, F., Rossi, G. F.: Electrophysiological analysis of the action of atropine on the central nervous system. Arch. Ital. Biol. 98, 293–307 (1960)

    Google Scholar 

  • Longo, V. G.: Acetylcholine, cholinergic drugs and cortical electrical activity. Experientia 11, 76–78 (1955)

    Google Scholar 

  • Longo, V. G.: Effects of scopolamine and atropine on electroencephalographic and behavioural reactions due to hypothalamic stimulation. J. Pharmacol. Exp. Ther. 116, 198–208 (1956)

    Google Scholar 

  • Millichap, J. G.: Relation of laboratory evaluation to clinical effectiveness of antiepileptic drugs. Epilepsia 10, 315–328 (1969)

    Google Scholar 

  • Swinyard, E. A., Castellion, A. W.: Anticonvulsant properties of some benzodiazepines. J. Pharmacol. Exp. Ther. 151, 369–375 (1966)

    Google Scholar 

  • Tower, D. B., Elliott, K. A. C.: Activity of acetylcholine system in cerebral cortex of various unanaesthesized mammals. Am. J. Physiol. 168, 747–759 (1952)

    Google Scholar 

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Rastogi, S.K., Puri, J.N., Sinha, J.N. et al. Involvement of central cholinoceptors in metrazol-induced convulsions. Psychopharmacology 65, 215–217 (1979). https://doi.org/10.1007/BF00433052

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