Neuroprotective activity of Garcinia morella desr against monosodium glutamate-induced neurotoxicity in rats

Abstract

The aim of the present study is to evaluate the neuroprotective effect of methanol extract of Garcinia morella Desr leaves in monosodium glutamate (MSG) induced neurotoxicity in rats. The MSG 2 g/kg, i.p. was used to induce the neurotoxicity. The rats were administrated with methanol extract of Garcinia morella Desr leaves (MEGM) 200 and 400 mg/kg, p.o. and Dextromethorphan 30 mg/kg, p.o. after 1 h injection of MSG. The animals were evaluated for its behavioural factors such as muscle grip and locomotor activity. At the end of the study, the antioxidant enzymes levels, neurotransmitter levels, TNFα, ß-amyloid and mineral levels were estimated in brain homogenate. The MEGM treated group shows significant improvement of behavioural and locomotor activity and muscle strength against MSG induced neurotoxicity. The glutathione, SOD, catalase and total protein levels were significantly increased in MEGM treated group. However, significant reduction within the level of varied neurotransmitters like AChE, Dopamine, TNFα, ß-amyloid were observed on treatment with MEGM extract. Further, MEGM also significantly decrease the MSG induced toxicity through declined levels of Ca+2 and Na+ with increased levels of K+. In conclusion, the present study suggests that the MEGM has significant neuroprotective activity against MSG induced neurotoxic rats.