European journal of pharmacology · 1986
Correlation of the hypnotic potency of benzodiazepines with inhibition of voltage-dependent calcium uptake into mouse brain synaptosomes.
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Leslie S W, Chandler L J, Chweh A Y, Swinyard E A
Аннотация
Nine benzodiazepines were tested for their ability to inhibit 45Ca2+ uptake into mouse whole brain synaptosomes and for hypnotic activity as indicated by their ability to produce loss of the righting reflex. Eight of the benzodiazepines significantly inhibited fast-phase voltage-dependent 45Ca2+ uptake and five exhibited hypnotic activity. There was a direct correlation between the hypnotic potency of these five benzodiazepines and their ability to inhibit 45Ca2+ uptake. There does not appear to be a correlation between the anticonvulsant potency of the benzodiazepines and their potency for inhibiting 45Ca2+ uptake. These results support previous findings with other sedative/hypnotic drugs and suggest that inhibition of presynaptic calcium uptake may be linked with hypnotic but not anticonvulsant actions of benzodiazepines.