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作 者:肖向建[1] 齐亚超[1] 高钟生[1] 李强[1] 郭宗成[1] 吕佩源[1]
出 处:《中华行为医学与脑科学杂志》2011年第8期688-689,共2页Chinese Journal of Behavioral Medicine and Brain Science
基 金:河北省卫生厅医学科学研究重点课题(20090236)
摘 要:目的探讨丁基苯酞对慢性脑缺血大鼠学习记忆能力以及前脑组织线粒体Na+-K+-ATP酶的影响。方法将实验用SD大鼠随机分为假手术组(n=10)、模型组(n=15)、丁基苯酞大剂量治疗组(n=15)和小剂量治疗组(n=15)。采用双侧颈总动脉结扎制作慢性脑缺血模型,4周后,分别给模型组、大、小量丁基苯酞组大鼠腹腔注射生理盐水、丁基苯酞6mg/kg和2mg/kg,2次/d。用药4周后,利用Morris水迷宫试验测试大鼠学习记忆能力,提取前脑组织线粒体,测定线粒体Na+-K+-ATP酶的活性。结果较假手术组相比,模型组大鼠记忆能力明显下降,逃避潜伏期延长[分别为(10.41±3.81)s和(25.54±9.82)s,P〈0.01]线粒体ATP酶活力下降[分别为(3.73±0.32)μmol·mgprot-1·h-1和(2.81±0.40)μmol·mgprot-1·h-1,P〈0.05],而丁基苯酞大、小剂量组较模型组记忆能力显著增强[分别为(11.72±5.78)s和(12.48±5.45)s,P〈0.01],ATP酶活力明显增加[分别为(3.53±0.37)μmol·mgprot-1·h-1和(3.43±0.43)μmol·mgprot-1·h-1,P〈0.05],不同剂量丁基苯酞组差异无显著性(P〉0.05)。结论丁基苯酞注射液可增强缺血区神经元线粒体Na+-K+-ATP酶活力,改善线粒体能量代谢,提高慢性脑缺血大鼠的学习记忆能力。Objective To explore the effects of dl-3-n-butylphthalide on learning-memory ability and Na + -K + -ATPase activity of mitochondria in rats with chronic cerebral hypoperfusion. Methods Sprague-Dawlay rats were randomly divided into sham group( n = 10) ,model group (Permanent occlusion of bilateral common ca- rotid arteries) ( n = 15 ), small dose dl-3-n-butylphthalide group (2 mg · kg-1· d-1) ( n = 15 ) and large dose dl-3- n-butylphthalide group(6 mg· kg-1· d-1) ( n = 15 ). 4 weeks later,the learning-memory ability were evaluated by water maze test. Na+ -K+ -ATPase activity in mitochondria of forebrain tissue were also measured. Results Compared with sham group, memory ability of rats in model group decreased obviously (( 10.41 ± 3.81 ), (25.54 ± 9.82 ) s, P 〈 0.01 ), and the ATPase activity significantly decreased ( 3.73 ±0. 32 ), ( 2.81± 0.40 ) μmol·mgprot-1·h-1, p 〈 0.05 ). The memory ability of rats in large/small dose dl-3-n-butylphthalide groups both increased notably compared with the model group( respectively( 11.72 ± 5.78 ) s and ( 12.48 ± 5.45 ) s, P 〈 0.01 ) and Na + - K + -ATPase activity increased ( respectively ( 3.53 ±0.37 ) and ( 3.43 ± 0.43 ) μmol·mgprot-1·h-1 , P 〈 0.05 ). The effectives of large dose dl-3-n-butylphthalide and that of small dose dl-3-n-butylphthalide have no significantly differences. Conclusion D1-3-n-butylphthalide could increase the Na + -K + -kTPase activity and protect mitoehondria, improve the learning-memory ability of rats with chronic cerebral hypoperfusion.
关 键 词:丁基苯酞 慢性脑缺血 学习记忆 NA+-K+-ATP酶
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