OBJECTIVE To evaluate the anti-vertigo effect of phencynonate hydrochloride. METHODS To detect the improvement of phencynonate hydrochloride on cerebral blood flow, a rat model wa s es?tablished with bilateral common carotid arteries occlusion. Phencynonate hydrochloride 0.1-4.0 mg·kg-1 was ig given, twice a day for three consecutive days and the alteration of cerebral blood flow was measured with laser Doppler flowmetry. Rotating acceleration equipment was used to provocate mouse vertigo for 30 min, and the spontaneous locomotor activities were tested for occurrence of vertigo in mice. Phencynonate hydrochloride 1.4-5.6 mg·kg-1 was ig given before rotating acceleration. Gastric phenol red emptying rate was used to determine the anti-nausea effect of the test drug in mice 30 min after phencynonate hydrochloride 1.4-8.4 mg·kg-1 was ig given. RESULTS The cerebral blood flow of the rat model with bilateral common carotid arteries occlusion was reduced significantly after 24 h (P<0.01). Compared with the model group, phencynonate hydrochloride (0.5, 2.0 and 4.0 mg · kg-1) increased the cerebral blood flow in a dose-dependent manner in rats with cerebral ischemia (P<0.01). The spontaneous locomotor activities were significantly reduced after vertigo stimulation in mice (P<0.05). Compared with the model group, phencynonate hydrochloride (2.8 and 5.6 mg · kg-1) increased the movement distance and speed of vertigo mice (P<0.05). Phencynonate hydrochloride (2.8, 5.6 and 8.4 mg·kg-1) inhibited the gastric emptying of mice (P<0.05). CONCLUSION Phecynonate hydrochloride can improve the cerebral blood flow and locomotor activities in vertigo rats, while inhibiting gastric emptying, which points to the therapeutic potential of phencynonate hydrochloride for vertigo in clinic.%目的 研究盐酸苯环壬酯的抗眩晕作用.方法 利用双侧颈总动脉结扎法制备大鼠脑缺血模型,大鼠ig给予盐酸苯环壬酯0.1~4.0 mg·kg-1,每天2次,连续3 d,结合激光多普勒脑血流仪检测盐酸苯环壬酯对脑血流量变化的影响.通过XY-5双轴变速旋转刺激制备小鼠眩晕症模型,小鼠ig给予盐酸苯环壬酯1.4~5.6 mg·kg-1后变速旋转刺激30 min,检测自发活动的变化;小鼠ig给予盐酸苯环壬酯1.4~8.4 mg·kg-130 min后,通过检测胃酚红排空率指标观察盐酸苯环壬酯对小鼠胃平滑肌的影响.结果 大鼠双侧颈总动脉结扎24 h后脑血流量显著减少(P<0.01);与模型组比较,盐酸苯环壬酯0.5,2.0和4.0 mg·kg-1可显著增加缺血大鼠脑血流量(P<0.05).通过旋转刺激后,模型小鼠自发活动的总路程减少(P<0.05),运动速度减慢(P<0.05);与模型组比较,盐酸苯环壬酯2.8和5.6 mg·kg-1可增加眩晕小鼠总路程和运动速度(P<0.05);盐酸苯环壬酯5.6和8.4 mg·kg-1降低小鼠胃酚红排空率(P<0.05).结论 盐酸苯环壬酯增加脑血流量,改善后循环缺血,对眩晕的呕吐症状和运动功能具有显著的改善作用.
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