血管性痴呆大鼠脑中生长抑素和乙酰胆碱含量的变化

目的探讨生长抑素和乙酰胆碱含量在血管性痴呆中的变化规律及意义.方法建立大鼠血管性痴呆模型,应用AAR比率作为判断大鼠学习记忆功能的指标;应用放射免疫分析方法测定大鼠不同脑区生长抑素和乙酰胆碱含量,并用胆碱酯酶抑制剂石杉碱甲进行干预.结果血管性痴呆大鼠脑中生长抑素和乙酰胆碱含量明显降低,应用石杉碱甲可改善这一现象.结论血管性痴呆的发生与脑缺血后生长抑素含量的降低有关,生长抑素可能通过与乙酰胆碱的相互调节作用参与血管性痴呆的病理过程.

Changes of somatostatin and acetylcholine contents in vascular dementia rats

Objective To explore the changes and significance of somatostatin (SS) and acetylcholine (Ach) contents in vascular dementia rats. Methods Model of vascular dementia rats was established. Active avoidance responase (AAR) ratio was used as the index for the judgement of the learning and memory abilities of vascular dementia rats. The SS and Ach contents in different cerebral sections of rats with and without intervention of huperzine A were determined by radioimmunoassay. Results A remarkable decrease in SS and Ach contents was found in vascular dementia rats, which could be reversed by intervention of huperzine A. Conclusion The decreased SS content in cerebrum after ischemia is related with vascular dementia. SS may be involved in the pathological process of vascular dementia through the mutual regulation with Ach.