Antagonistic effects of shikimic acid against focal cerebral ischemia injury in rats subjected to middle cerebral artery thrombosis.

Y Ma, Q P Xu, J N Sun, L M Bai, Y J Guo, J Z Niu
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Abstract

Aim: To study the effects of shikimic acid (SA) on focal cerebral ischemic injury after middle cerebral artery thrombosis (MCAT).

Methods: Thrombosis was induced by FeCl3 in middle cerebral artery of rats. The influences of SA on neurologic deficit (ND), infarct size (IS), brain edema, and cerebral blood flow (CBF) in ischemic region were observed.

Results: SA 25 and 50 mg.kg-1 i.p. for 3 d before MCAT attenuated ND, and reduced IS by 51% and 42%; and decreased brain water content from 80.7% to 79.8% and 79.9%; and increased CBF after ischemia from 50.2% of the preischemic level to 75.5% and 73.3%, respectively. In pathologic examination, there was much less thrombosis in MCA in the rat with the pretreatment by SA 25 mg.kg-1. The extent of brain ischemia was much less than that of control.

Conclusions: SA reduced focal cerebral ischemic injury induced by middle cerebral artery thrombosis.

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莽草酸对脑中动脉血栓形成大鼠局灶性脑缺血损伤的拮抗作用。
目的:探讨莽草酸(SA)对大脑中动脉血栓形成(MCAT)后局灶性脑缺血损伤的影响。方法:用FeCl3诱导大鼠大脑中动脉血栓形成。观察SA对缺血区神经功能缺损(ND)、梗死面积(IS)、脑水肿及脑血流量(CBF)的影响。结果:SA 25、50 mg。MCAT前3 d kg-1 ipp可减弱ND, IS降低51%和42%;脑含水量从80.7%下降到79.8%和79.9%;脑血流从缺血前的50.2%分别增加到75.5%和73.3%。病理检查显示,SA 25 mg.kg-1预处理大鼠MCA血栓形成明显减少。大鼠脑缺血程度明显小于对照组。结论:SA可减轻大脑中动脉血栓形成所致局灶性脑缺血损伤。
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