Abstract
BackgroundThe inhibition of protein kinase C (PKC) was recently suggested as a novel approach for the development of mood stabilizing drugs. MethodsTo further evaluate this possibility, the aim of the present study was to test the effects of peripheral (intraperitoneal) administration of chelerythrine in a battery of mania-related behavioral tests in black Swiss mice, a strain specific battery that was previously demonstrated to distinguish differential effects of mood stabilizing drugs. ResultsSub-chronic administration of 1.0mg/kg or 2.0mg/kg chelerythrine had marginal effects to reduce spontaneous activity and sweet solution preference in black Swiss mice which naturally show mania-like behaviors. Chelerythrine had no effects on the behavior of these mice in the elevated plus-maze, the forced swim test and the amphetamine-induced hyperactivity test. ConclusionsThe partial effects in the battery are not unique as previous studies showed that lithium, valproate and risperidone, all used in the treatment of bipolar disorder, have distinct profiles in the battery. It is therefore concluded that chelerythrine may have antimanic effects and additional dose and time response studies are warranted to further evaluate its range of activity.
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