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Effect and mechanism of Coeloglossum viride var.bracteatum extract on scopolamine-induced deficits of learning and memory behavior of rodents
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- Author:
- No author available
- Journal Title:
- ACTA PHARMACEUTICA SINICA
- Issue:
- 5
- DOI:
- 10.3321/j.issn:0513-4870.2009.05.005
- Key Word:
- 旺拉;东莨菪碱;跳台;长时程增强;胆碱乙酰转移酶;乙酰胆碱酯酶
Abstract： 观察藏药旺拉提取物(CE)对东莨菪碱致动物学习记忆障碍的改善作用并研究其作用机制.采用腹腔注射东莨菪碱造模,以跳台法测定小鼠的学习记忆能力,以电生理方法测定大鼠海马长时程增强(LTP)的诱导,分别以生化及放射性同位素分析法测定脑匀浆中乙酰且日碱酯酶(ACHE)及胆碱乙酰转移酶(ChAT)的活性.结果表明,模犁动物跳下平台的潜伏期明显缩短,LTP诱导受抑制.灌胃给予CE(5、10及20 mg·kg-1)可改善模型小鼠在跳台中的表现,腹腔注射CE(5 mg·kg-1)可逆转东莨菪碱对人鼠LTP诱导的抑制.此外,CE可显著增强ChAT活性,而对AChE活性无显著影响.CE可改善东莨菪碱致小鼠学习记忆障碍,其作用可能与改善海马LTP诱导及增强ChAT活性有关.
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