天麻半夏湯이 腦虛血에 미치는 機轉 硏究 - 腦血流力學 變動 改善을 中心으로 -
Mechanism Study of Cheonmabanhwa-Tang on the Cerebral Ischemia in Rats
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Abstract
Cheonmabanhwa-Tang(CBT) has been used in the Oriental Medicine for many centuries as a therapeutic agent for dizziness due to Poong-Dam. This Study was designed to investigate the mechanism of Prescription on cerebral hemodynamics〔regional cerebral blood flow(rCBF) and pial arterial diameter(PAD)〕in cerebral ischemia rats. The results in cerebral ischemic rats were as follows:Both rCBF and PAD were significantly and stably increased by CBT (10 ㎎/㎏, i.p.) during the period of cerebral reperfusion, which contrasted with the findings of rapid and marked increase in control group. Pretreatment with indomethacin(1 ㎎/㎏, i.p.), an inhibitor of cyclooxygenase significantly but unstably increased the CBT-induced increases in PAD as well as rCBF during the period of cerebral reperfusion. Pretreatment with methylene blue(10 ㎍/㎏, i.p.), an inhibitor of guanylate cyclase significantly but unstably increased the CBT-induced increases in PAD as well as rCBF during 150 minutes of cerebral reperfusion, but decreased stably the CBT-induced increases in rCBF and PAD after 180 minutes of cerebral reperfusion. In conclusion, the present authors thought that CBT caused effect on cerebral hemodynamics via mediation of cyclooxygenase.
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