通过直接抑制病理性CDK5活性,Protopanaxatriol可以在接受酸治疗的小鼠中恢复认知功能
Ye Peng1,2,3, Sha-Sha Wang1,2, Ke-Dao Lai3
1College of Pharmacy, Hunan University of Chinese Medicine, Changsha, 410208, China.
Acta pharmacologica Sinica
|January 21, 2026
概括
普罗托帕纳克沙醇 (Ppt),是金赛诺化物Rg1的代谢物,显示出对阿尔茨海默氏症的神经保护作用.
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.
- 生物化学 生化学
背景情况:
- 阿尔茨海默病 (AD) 带来了治疗挑战,粉样蛋白向策略面临安全问题.
- 传统中医 (TCM) 提供了潜在的替代治疗方法.
- 丁化物Rg1的代谢物,原甲醇 (Ppt),由于大脑生物可用性更好,可能会产生神经保护作用.
研究的目的:
- 为了研究Ppt的治疗效果,对一种由okadaic acid (OKA) 诱导的神经退行症的小鼠模型进行了研究.
- 阐明Ppt神经保护作用的潜在机制,重点关注tau病理和CDK5.5.
- 评估Ppt对认知功能和线粒体平衡的影响.
主要方法:
- 在体外研究中,使用培养的海马神经元接受了OKA和Ppt的治疗.
- 生物化学试验包括金星-双分子光补充 (BiFC),分子动力学模拟,微尺度热泳 (MST) 和与CDK5突变物共免疫沉 (Co-IP).
- 在体内研究涉及Ppt在OKA诱导的小鼠模型中,评估空间记忆 (新型物体识别,巴恩斯迷宫) 和海马体转录基因分析.
主要成果:
- Ppt在体外证明了对OKA诱导的细胞毒性产生剂量依赖的神经保护作用.
- Ppt抑制了tau聚合,并在Cys83与CDK5的催化域结合,破坏了CDK5/p25复合物的稳定.
- 在体内,Ppt改善了空间记忆缺陷和调节了Drp1-介导的线粒体动力学,减轻了线粒体平衡破坏.
结论:
- 在神经退行模型中,Ppt通过在Cys83选择性地准CDK5,减少激酶活性和改善认知结果来减弱tau病理.
- Ppt重新平衡线粒体功能,提供对神经毒性的保护作用.
- 这项研究强调了Ppt对阿尔茨海默病的治疗潜力,并支持CDK5调制作为tau相关神经退行症的可行策略.
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