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中国临床药理学与治疗学 ›› 2003, Vol. 8 ›› Issue (5): 503-505.

• 研究原著 • 上一篇    下一篇

新型M受体激动剂MA9701的促智作用

崔永耀, 冯菊妹, 刘慧中, 朱亮, 荣征星, 陆阳, 陈红专   

  1. 上海第二医科大学药物研究所,上海 200025
  • 收稿日期:2003-05-04 修回日期:2003-05-18 出版日期:2003-10-26 发布日期:2020-11-19
  • 通讯作者: 陈红专,男,教授,博士生导师,研究方向:分子药理学和临床药理学。Tel:021-63846590-776451 E-mail:yaoli@shsmu.edu.cn
  • 作者简介:崔永耀,男,硕士,副主任技师,主要研究方向:受体药理学。
  • 基金资助:
    国家自然科学基金项目(No30070860);上海市教委科技发展基金项目(98B5, 02BZ30);上海市教委重点学科研究基金项目(No9970204)

Effect of anovel muscarinic receptor agonist MA9701 on cognitive improvement

CUI Yong-Yao, FENG Ju-Mei, LIU Hui-Zhong, ZHULIang, RONG Zheng-Xing, LU Yang, CHEN Hong-Zhuan   

  1. Institute of Drug Research,Shanghai Second Medical University,Shanghai 200025,China
  • Received:2003-05-04 Revised:2003-05-18 Online:2003-10-26 Published:2020-11-19

摘要: 目的 观察新型莨菪类化合物MA9701 对小鼠记忆障碍模型的学习与记忆影响,以及对大鼠皮层海马组织的M 受体动力学特性的影响。方法 建立小鼠乙醇致记忆再现障碍和东莨菪碱致记忆获得障碍模型,用避暗法测定学习与记忆功能。用受体放射配基法测定M 受体动力学参数。结果 与模型组比较,MA9701 3 、10 mg·kg-1剂量均可显著延长乙醇致记忆障碍小鼠自明处进入暗处的潜伏期,减少错误次数,量效曲线呈倒U 型;MA9701 5 、10 mg·kg-1剂量,可使东莨菪碱致记忆获得障碍小鼠的错误次数显著降低,而潜伏期无显著延长。MA9701 对大鼠皮层海马组织的M 受体具有较强的亲和力,其Ki 分别为氧化震颤素、槟榔碱的6 及23倍。结论 新型莨菪类衍生物MA9701 能明显改善乙醇和东莨菪碱所致小鼠学习与记忆障碍功能,其作用可能与激动脑内皮层和海马中枢M 胆碱受体有关。

关键词: 药理学, 莨菪烷化合物, M 受体激动剂, 学习与记忆, 放射配基分析

Abstract: AIM: To evaluate the cognitive improvement of MA9701,a newly synthesized nortropane and its bindingProperties at muscarinic receptor in the cortex and hippocampus.METHODS: Learning and memoryPerformance was studied using step-through test in mice.The kinetics for the binding to muscarinic receptor in the cortex and hippocampus were determined using [3H]-QNB.RESULTS: Compared with ethanol model group,MA9701 (3 and 10 mg·kg-1)obviously decreased the number of errors in five minutes andProlonged the footshockPassive avoidancelatency in a dose-dependent and U-shaped manner.And also,MA9701 (5 and 10 mg·kg-1)could significantly reverse scopolamine-induced memory impairment.Radioligand binding assays showed that MA9701 had 6 and 23 times higher affinities to muscarinic receptor in the cortex and hippocampus than oxo and arecloine,respectively.CONCLUSION: Novel nortropane MA9701 might exertPotent cognitive improvement by the activation of muscarinic receptor in the cortex and hippocampus.

Key words: pharmacology, M receptor agonist, learning and memory, radioligand binding assay

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