Neuropharmacological evaluation of methanolic extract of Costus speciosus Linn rhizome in Swiss albino mice
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2019
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Chen, U.
Hussain, M.S.
Mazumder, T.
Uddin, S.M.N.
Banik, S.
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Asian Pacific Journal of Tropical Biomedicine, 2019; 9(5):217-221
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Objective: To evaluate the neuropharmacological properties of Costus speciosus (C. speciosus) rhizome using different experimental mouse models. Methods: The anxiolytic effect was investigated by hole-board test, elevated plus maze and light/dark test, while central nervous system (CNS) depressant effect was evaluated by thiopental sodium-induced sleep test. Finally, antidepressant effect was evaluated by forced swimming test and tail suspension test. Results: In both elevated plus maze and hole board test, 400 mg/kg C. speciosus showed more significant CNS depressant effect than 1 mg/kg diazepam. Both 200 mg/kg and 400 mg/kg C. speciosus extract produced a significant dose-dependent decrease in onset of sleep. In forced swimming test, C. speciosus rhizome showed a decrease in duration of immobility in a dose-dependent manner. Imipramine (10 mg/kg) and C. speciosus extract at 400 mg/kg dose exhibited a significant reduction in duration of immobility in tail suspension test which provided additional evidence of antidepressant effect of C. speciosus rhizome. Conclusions: Our study indicates that C. speciosus rhizome possesses CNS depressant, anxiolytic and antidepressant-like activities. Further studies are warranted determine the exact phytoconstituents and mechanism of action responsible for the neuropharmacological effect.
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