首都医科大学学报 ›› 2011, Vol. 32 ›› Issue (4): 494-500.doi: 10.3969/j.issn.1006-7795.2011.04.012

• 神经元退行性变的实验研究 • 上一篇    下一篇

黄芩茎叶黄酮对大鼠缺血性记忆障碍的改善作用及对胆碱乙酰转移酶和一氧化氮合酶蛋白表达的影响

王玉梅, 曹凯, 刘永平, 秦博文, 商亚珍   

  1. 河北省重要研究与开发重点实验室/承德医学院中药研究所,承德 067000
  • 收稿日期:2011-03-30 修回日期:1900-01-01 出版日期:2011-08-21 发布日期:2011-08-21

Effects of flavonoids from scutellaria stem and leaf on memory impairment and the expression of choline acetyltransferase and nitric oxide synthase in chronic cerebral ischemia rats

WANG Yu-mei, CAO Kai, LIU Yong-ping, QIN Bo-wen, SHANG Ya-zhen   

  1. Hebei Province Key Laboratory of Traditional Chinese Medicine Research and Development/Institute of Traditional Chinese Medicine, Chengde Medical College, Chengde 067000, China
  • Received:2011-03-30 Revised:1900-01-01 Online:2011-08-21 Published:2011-08-21

摘要: 目的 探讨黄芩茎叶黄酮(flavonoids from stem and leaf of scutellaria baicalensis georgi,SSF)对大鼠永久性慢性脑缺血引起记忆障碍的改善作用及对胆碱乙酰转移酶和一氧化氮合酶蛋白表达的影响。方法 雌性sprague-dawley(SD)大鼠双侧颈总动脉永久结扎2个月制备慢性脑缺血记忆障碍模型,通过Morris水迷宫检测大鼠学习记忆能力,免疫组化测定海马细胞中胆碱乙酰转移酶(chloine acetyltransferase,ChAT)、神经元型一氧化氮合酶(neuronal nitric oxide synthase,nNOS)、诱导型一氧化氮合酶(inducible nitric oxide synthase,iNOS)和内皮型一氧化氮合酶(endothelial nitric oxide synthase,eNOS)蛋白表达来探讨黄芩茎叶黄酮对大鼠缺血性记忆障碍的改善作用及对胆碱乙酰转移酶和一氧化氮合酶蛋白表达的影响。结果 与假手术组相比,脑缺血模型组大鼠的学习记忆能力显著降低,找到平台的游泳路程显著延长;海马细胞中ChAT 和eNOS蛋白表达显著降低;nNOS 和iNOS 蛋白表达显著增加。然而,17.5、35.0和70.0 mg/kg SSF灌胃给脑缺血大鼠38 d均能不同程度地改善学习记忆能力障碍,明显缩短大鼠找到平台的游泳路程;增加海马细胞中ChAT和eNOS蛋白的表达;抑制海马细胞中nNOS和iNOS蛋白的表达。结论 SSF对大鼠脑缺血性记忆障碍具有明显的改善作用,其作用机制可能与调节脑内ChAT 和一氧化氮合酶的异常变化有关。

关键词: 黄芩茎叶黄酮, 慢性脑缺血, Morris水迷宫, 胆碱乙酰转移酶, 一氧化氮合酶

Abstract: Objective To study the effects of flavonoids from scutellaria stem and leaf(SSF) on memory impairment and the expression of choline acetyltransferase(ChAT) and nitric oxide synthase(NOS) in chronic cerebral ischemia rats. Methods The model of chronic cerebral ischemia was established by bilateral carotid artery occlusion for 2 months with female SD rats. The functions of learning and memory were detected by Morris water maze, the expression of ChAT, neuronal nitric oxide synthase(nNOS), inducible nitric oxide synthase(iNOS) and endothelial nitric oxide synthase(eNOS) were examined by immunohistochemical method. Results Compared with the sham group, memory ability was significantly decreased, the expressions of ChAT and eNOS significantly decreased, as well as the expressions of nNOS and iNOS were dramatically increased in cerebral ischemia group rats. However, the treatment with 17.5, 35 and 70 mg·kg-1 SSF for 38 d of the ischemic rats showed a significant improvement in impairment of memory ability and the abnormal changes of ChAT, eNOS nNOS and iNOS in the brain of ischemic rats. Conclusion SSF can improve the memory impairment induced by chronic cerebral ischemia in rats, which may be related to regulation of the abnormal changes of ChAT and NOS in the ischemic rats’ brain.

Key words: flavonoids from stem and leaf of scutellaria baicalensis georgi, chronic cerebral ischemia, Morris water maze, chloine acetyltransferase, nitric oxide synthase

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