在帕金森症和帕金森病的尼格罗斯特里亚特病理学
Yaping Chu1, Warren D Hirst2,3, Howard J Federoff4
1ASU-Banner Neurodegenerative Disease Research Center, Arizona State University, Tempe, AZ 85281, USA.
Brain : a journal of neurology
|November 25, 2023
概括
帕金森病的神经退行可能始于tau病理,而不是α-synuclein. 轻度运动缺陷表现出类似的多巴胺基神经元损失,无论阿尔法同核素存在,涉及tau在早期疾病阶段.
科学领域:
- 神经科学是一个神经科学.
- 神经病理学神经病理学
- 运动障碍 运动障碍
背景情况:
- 帕金森氏病 (PD) 的特点是来自阴侧变化的运动症状.
- 皮尔斯顿病症通常涉及多种病理,但它们的早期作用和与尼格罗斯特里亚特变性退化的关系尚不清楚.
- 轻度运动缺陷 (MMD) 代表了PD诊断之前的临床阶段.
研究的目的:
- 调查轻度运动障碍患者早期的共同病理.
- 为了确定是否需要α-synuclein聚合在MMD中尼格罗斯特里雅特变性.
- 探索病理在MMD中神经退行症的启动中的作用.
主要方法:
- 招募了轻度运动障碍不足以诊断PD的受试者.
- 根据尼格拉尔α-synuclein聚合物的存在或不存在 (synucleinopathy) 来对MMD受试者进行分类.
- 评估了尼格拉尔多巴胺激应神经元损失,门多巴胺激应内置和氨酸氧酶表型.
- 定量AT8阳性化tau (tau病理) 在黑质和质中.
主要成果:
- 多巴氨基神经元的损失和内置在MMD组与没有尼格拉尔α-synuclein的MMD组中均发生.
- 两组MMD群体表现出相似的酸化 (AT8阳性),与对照组不同.
- 早期和晚期tau酸化标记证实了这些发现.
- 尼格罗斯特里雅特变性观察到独立于α-synuclein聚合物.
结论:
- 在MMD中,尼格罗斯特里亚特性多巴胺基神经退行可以独立于α-synuclein聚合启动.
- 陶介导的病理似乎在尼格罗斯特里亚特性退行症的早期阶段起着重要作用.
- 这些发现挑战了对α-synuclein作为PD相关神经退行症的唯一发起者的传统观点.
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