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Introduction: The rhizomes of Alpinia galanga (L.) Willd (Zingiberaceae) commonly known as greater galangal, a ginger substitute for food and was traditionally used as nervine tonic and stimulant. The present study was designed to screen the neuroprotective role of hydroalcoholic extract of rhizome of Alpinia galanga (HAAG) in transient forebrain ischemia induced neuronal damage and oxidative injury in the rat brain. Materials and Method: The transient forebrain ischemia was induced by bilateral common carotid artery occlusion in anesthetized rats for 60 min, followed by reperfusion injury. The transient forebrain ischemia induced neuronal damage and oxidative stress was assessed by estimating the percentage survival neurons in the Cornu ammonis CA1 and CA3 regions of hippocampus, MDA levels and antioxidant enzymes activities in the brain homogenate. Open field, actophotometer and grip strength tests were used for behavioral assessment. Recovery in spontaneous motor activity in actophotometer test and number of squares crossed and rearing behavior in the open field test are indicators of cognitive enhancement after treatment with Alpinia galanga. Results and Discussion: Treatment with Alpinia galanga attenuated the delayed neuronal death in the CA1 and CA3 regions of hippocampus. Reduced post-ischemic brain tissue MDA levels at both the drug doses and increased antioxidant enzyme such as glutathione peroxidase at a higher dose was also noted, which indicates Alpinia galanga is neuroprotective against ischemic hippocampal injury. The present study demonstrated that treatment with HAAG attenuated forebrain ischemic reperfusion induced neuronal injury and oxidative stress in hippocampus. Conclusion: Treatment with Alpinia galanga may have the potential to be used as a protective agent in forebrain ischemic injury.

Neuroprotective Functions of Alpinia galanga in Forebrain Ischemia Induced Neuronal Damage and Oxidative Insults in Rat Hippocampus