• Pharmacol. Biochem. Behav. · Jan 1985

    Involvement of a GABAergic mechanism in the anticonvulsant effect of pentobarbital against maximal electroshock-induced seizures in rats.

    • S K Rastogi and M K Ticku.
    • Pharmacol. Biochem. Behav. 1985 Jan 1; 22 (1): 141-6.

    AbstractThe interaction between pentobarbital and other modulators of GABAergic transmission (diazepam, ethanol and progabide) was investigated on maximal electroshock seizures and on the loss of righting reflexes in rats. Pentobarbital, diazepam and ethanol produced a dose-dependent protection against electroshock seizures, with pentobarbital being more potent (3- and 50-times) than diazepam and ethanol. Progabide neither provided protection nor caused loss of righting reflex. Subprotective doses of pentobarbital and diazepam, together or when combined with a single ineffective dose of ethanol or progabide, caused protection against seizures and loss of righting reflex for variable durations, while ethanol and progabide combination did not provide protection. The protective effect of diazepam was antagonized by RO15-1788, picrotoxin and bicuculline pretreatments. The antagonism of pentobarbital protection by a specific GABA receptor antagonist, bicuculline suggests involvement of the GABAergic system in the anticonvulsant effect of pentobarbital. These results indicate that, like diazepam, the anticonvulsant effect of pentobarbital appears to be mediated through a GABAergic mechanism.

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