一种新型的双GLP-1/CCK受体激动剂在5×FAD阿尔茨海默氏症小鼠模型中改善认知表现和突触生成
He Ma1, Zhenghui Chang1, Hongyu Sun1
1School of Medical Sciences, Academy of Chinese Medical Sciences, Shangzhen Academy, Henan University of Chinese Medicine, Zhengzhou, 450046, Henan Province, China.
Molecular neurobiology
|May 8, 2025
概括
一种双重的葡萄糖类1 (GLP-1) 和胆固醇基因素 (CCK) 受体激动剂在阿尔茨海默氏病模型中显示出神经保护作用. 虽然它是有效的,但在大多数测试参数中,它并没有显著地超过GLP-1模拟品利拉格胺.
科学领域:
- 神经科学是一个神经科学.
- 药理学 药理学是指药理学的学科.
- 内分泌学 在内分泌学.
背景情况:
- 类似葡萄糖1 (GLP-1) 和胆囊托基宁 (CCK) 是一种激素,在阿尔茨海默氏病 (AD) 动物模型中已证明具有神经保护潜力.
- 这两种激素都起到生长因子的作用,CCK也起到神经递质的作用,这表明它在大脑健康中扮演着多方面的角色.
- 以前的研究表明,这些激素在临床前模型中的有效性,促使研究联合受体激活.
研究的目的:
- 在AD小鼠模型中评估一种新的双GLP-1/CCK受体激动剂的神经保护作用.
- 为了比较双重激动剂与GLP-1类似物利拉格卢提德的疗效,这是已知的治疗候选物.
- 评估双重激素对认知功能,神经炎症,粉样蛋白病理和突触可塑性的影响.
主要方法:
- 在14天内给5xFAD小鼠服用双GLP-1/CCK受体激动剂 (25nmol/kg) 或利拉格胺 (50nmol/kg).
- 使用水迷宫和Y迷宫进行行为测试,以评估记忆和认知功能.
- 针对炎症标记物 (NLRP3,IL-10,TNFα),粉样聚合物,生长因子 (BDNF,TrkB,p-CREB) 和突触蛋白 (PSD,synaptophysin) 的脑组织的生物化学分析.
- 传输电子显微镜和戈尔吉染色以评估突触结构和密度.
主要成果:
- 双重激素和利拉格卢提德通过使NLRP3,IL-10和TNFα水平正常化,改善了记忆力,增加了自发活动,并减少了慢性炎症.
- 这两种治疗都减少了大脑的粉样蛋白聚合物和调节SIRPα/CD47表达,同时显著增强了生长因子信号通路 (BDNF,TrkB,PI3K-AKT).
- 双重激动剂在水迷宫性能和提高BDNF/TrkB水平方面表现优于利拉格胺,尽管其他效果相似.
结论:
- 双GLP-1/CCK受体激活在AD小鼠模型中表现出显著的神经保护和认知增强效应.
- 综合方法有效地减少神经炎症和粉样蛋白病理,同时促进突触可塑性和生长因子信号传递.
- 尽管有一些优异的效果,但组合疗法与单个GLP-1受体激活Liraglutide相比没有显示出整体优势.
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