Effect of cyclooxygenase-2 (COX-2) inhibitors in various animal models (bicuculline, picrotoxin, maximal electroshock-induced convulsions) of epilepsy with possible mechanism of action.

Abstract:

:Enzyme cyclooxygenase (COX) is reported to play a significant role in neurodegeneration and may play a significant role in the pathogenesis of epilepsy. Bicuculline (4 mg/kg; ip), picrotoxin (8 mg/kg; ip) and electroshock (60 mA for 0.2 sec) significantly induced convulsions in male Laka mice. COX-inhibitors viz. nimesulide (2.5 mg/kg; ip) and rofecoxib (2 mg/kg, ip) administered 45 minutes prior to an epileptic challenge prolonged mean onset time of convulsions, decreased duration of clonus and decreased % mortality rate against bicuculline- and picrotoxin-induced convulsions in mice. COX-2 inhibitors were ineffective towards maximal electroshock-induced convulsions. Nimesulide (1 mg/kg) and rofecoxib (1 mg/kg) also enhanced the effect of subprotective dose of muscimol against picrotoxin-induced convulsions. The result of the present study strongly suggests for a possible role of cyclooxygenase isoenzymes particularly, COX-2 in the pathophysiology of epilepsy and its GABAergic modulation.

journal_name

Indian J Exp Biol

authors

Dhir A,Naidu PS,Kulkarni SK

subject

Has Abstract

pub_date

2006-04-01 00:00:00

pages

286-91

issue

4

eissn

0019-5189

issn

0975-1009

journal_volume

44

pub_type

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