抄録
In this study, we investigated whether angiotensin-converting enzyme (ACE) is involved in the progression of cerebral infarct lesions after middle cerebral artery (MCA) occlusion in rats. After placebo or trandolapril was administered orally for 7 days, we infarcted in the territory of the right MCA by extracranial vascular occlusion and studied the effect of trandolapril on brain ACE activity and infarct size 7 days after MCA occlusion. In placebo-treated rats, brain ACE activity in the infarct side was increased by a significant 1.34-fold compared with that in the non-infarct side 7 days after MCA occlusion. Brain ACE activities in the infarct sides were suppressed to 39.8% by trandolapril treatment. The ratios of unilateral infarcts to the total coronal sectional areas in placebo- and trandolapril-treated rats were 48.1±3.3% and 37.4±2.3%, respectively, and the difference between these values was significant. These results demonstrate that inhibition of the increased brain ACE activity in infarct lesions can reduce the infarction area after MCA occlusion.(Hypertens Res 2002; 25: 583-588)
