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OBJECTIVE To investigate the effects of Radix Cynanchum bungei extract(RCBE) on cerebral ischemia-reperfusion(I/R) and acute cerebral ischemia induced impairment in mice.METHODS I/R model was induced by bilateral carotid artery occlusion(BCAO)-reperfusion method and Y-maze learning and memory performance was assessed after reperfusion. Na~+-K~+-ATPase,Ca~(2+)-ATPase and SOD activity,as well as MDA content in mouse brain tissue were measured. Numbers of mouth-opening breaths of the isolated mouse head were observed in acute cerebral ischemia mice.RESULTS Learning and memory ability in mice with RCBE were improved significantly compared with model group. The activity of SOD,Na~+-K~+-ATPase and Ca~(2+)-ATPase were increased,while MDA contents decreased after RCBE(0.5,1.0 and 2.0 g·kg~(-1)) and piracetam(0.5 g·kg~(-1)) treatment compared with the model group. RCBE at all concentrations significantly prolonged the number of mouth-opening breaths of the isolated mouse head. CONCLUSION RCBE preconditioning exerts a marked neuroprotective effect on the ischemia brain,which is related to improve the learning and memory via regulating energy metabolism and anti-oxidation.
OBJECTIVE To investigate the effects of Radix Cynanchum bungei extract (RCBE) on cerebral ischemia-reperfusion (I / R) and acute cerebral ischemia induced impairment in mice. METHODS I / R model was induced by bilateral carotid artery occlusion and Y-maze learning and memory performance was assessed after reperfusion. Na ~ + -K ~ + -ATPase, Ca ~ (2 +) - ATPase and SOD activity, as well as MDA content in mouse brain tissue were measured. Numbers of mouth -opening breaths of the isolated mouse head were observed in acute cerebral ischemia mice .RESULTS Learning and memory ability in mice with RCBE were improved significantly compared with model group. The activity of SOD, Na ~ + -K ~ + -ATPase and Ca ~ (2 +) - ATPase were increased, while MDA contents decreased after RCBE (0.5,1.0 and 2.0 g · kg -1) and piracetam (0.5 g · kg -1) RCBE at all concentrations significantly prolonged the number of mouth-opening breaths of the isolated mouse head. CONCLUSION RCBE preconditioning exerts a marked neuroprotective effect on the ischemia brain, which is related to improve the learning and memory via via energy metabolism and anti-oxidation.