丹酚酸B拮抗大鼠缺血再灌注引起的脑损伤(英文)

目的:研究丹酚酸B对缺血再灌注脑损伤的拮抗作用。方法:采用大鼠局灶性脑缺血再灌注模型。以行为学实验评价中枢神经系统的损伤。采用比色法检测脑匀浆液中超氧化物歧化酶(SOD)的活性,以及还原型谷胱苷肽(GSH)、丙二醛(MDA)、三磷酸腺苷(ATP)和乳酸(LA)的含量。结果:局灶性脑缺血再灌注可造成行为学异常,丹酚酸B 10 mg·kg~(-1)可减轻此种异常。同时,丹酚酸B 10mg·kg~(-1)可以改善由于脑缺血再灌注所造成的SOD、GSH、和ATP含量降低以及MDA和LA含量增加。结论:丹酚酸B对脑缺血再灌注脑损伤具有保护作用,其作用机制与减轻脂质过氧化、促进自由基的清除以及改善能量代谢有关。

Salvianolic acid B protects brain against injuries caused by ischemia-reperfusion in rats

AIM: To study the protective effects of salvianolic acid B (Sal B) against the ischemia-reperfusion induced rat brain injury. METHODS: Focal cerebral ischemia-reperfusion model in rats was employed to study the protective effects of Sal B. The behavioural tests were used to evaluate the damage to the central nervous system. Spectrophotometric assay methods were used to measure the activity of superoxide dismutase (SOD), contents of reduced glutathione (GSH), malondialdehyde (MDA), adenosine 5-triphosphorate (ATP), and lactate acid (LA) in experimental rats' brain homogenate. RESULTS: Focal cerebral ischemia-reperfusion resulted in abnormal behavior which could be alleviated by Sal B 10 mg.kg-1 i.v., and nimodipine (Nim) 4 mg.kg-1 i.p. At the same time, Sal B 10 mg.kg-1 and Nim 4 mg.kg-1 could inhibit the decrease in SOD, GSH, and ATP levels and the increase in MDA and LA levels caused by ischemia-reperfusion in brain. CONCLUSION: Sal B showed a protective action against the ischemia-reperfusion induced injury in rat brain by reducing lipid peroxides, scavenging free radicals and improving the energy metabolism.