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 RESEARCH PAPER
Year : 2005  |  Volume : 37  |  Issue : 1  |  Page : 18-20

Neuropharmacological effects of alfa-cypermethrin in rats


1 Department of Pharmacology, University College of Medicine, Calcutta University, 244-B, A. J. C. Bose Road, Kolkata - 20, India
2 Chittaranjan National Cancer Research Institute, Kolkata, India

Correspondence Address:
S Manna
Department of Pharmacology, University College of Medicine, Calcutta University, 244-B, A. J. C. Bose Road, Kolkata - 20
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0253-7613.13849

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OBJECTIVE: To study the effect of α-cypermethrin (α-CP) on some neuropharmacological paradigms like motor coordination, pentobarbitone-induced sleeping time and pentylenetetrazole-induced (PTZ) convulsion as well as γ-aminobutyric acid (GABA) level in rat brain. MATERIALS AND METHODS: Albino Wistar rats were the experimental animals. Different neuropharmacological paradigms like motor coordination (determined by rotarod), pentobarbitone-induced sleeping time and PTZ-induced convulsion were carried out following oral administration of α-CP at two dose levels i.e., 145 mg/kg (LD50) and 14.5 mg/kg (1/10LD50), while the level of GABA in the brain of rats was estimated by HPLC after single-dose oral administration of α-CP at 145 mg/kg. RESULTS: α-CP induced significant motor incoordination, decreased the time of onset and increased the duration of sleeping time induced by pentobarbitone; and also decreased the time of onset and increased the duration of convulsion induced by PTZ at the dose levels of 145 mg/kg (LD50) and 14.5 mg/kg (1/10 LD50) respectively. Further α-CP decreased brain GABA levels in the cerebellum and in whole brain (except cerebellum) significantly at LD50 dose level. CONCLUSION: A correlation between the effect of α-CP on central GABA levels and its neuropharmacological effects can be hypothesized.






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