Abstract
Reserpine-induced orofacial dyskinesia in rats is an animal model of tardive dyskinesia that has been linked with free radical generation and oxidative stress. In the present study, reserpine (1 mg kg(-1), s.c.) was given to rats on days 1, 3 and 5 to induce orofacial dyskinesia, which is characterised by increased vacuous chewing and tongue protrusion. Sub-chronic treatment with Korean ginseng extract from day 1 to day 21 along with reserpine on days 1, 3 and 5 significantly and dose-dependently (100 and 200 mg kg(-1)) reduced reserpine-induced vacuous chewing movements and tongue protrusions. Reserpine-treated animals also showed poor retention of memory in the elevated plus maze paradigm. The sub-chronic Korean ginseng extract administration significantly reversed reserpine-induced retention deficits. Biochemical analysis revealed that repeated reserpine treatment significantly induced lipid peroxidation and decreased glutathione (GSH) levels in the brains of rats. Reserpine-treated rats also showed decreased levels of antioxidant defence enzymes, superoxide dismutase (SOD), and catalase. Sub-chronic administration of Korean ginseng extract dose-dependently and significantly reduced lipid peroxidation and restored decreased ...Continue Reading
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