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特定位点的性赋予的结构紧缩差异性介导Aβ42的细胞毒性

Gongyu Li^1,2, Chae Kyung Jeon³, Min Ma⁴

¹State Key Laboratory of Pharmaceutical Chemical Biology, Research Center for Analytical Science and Tianjin Key Laboratory of Biosensing and Molecular Recognition, Frontiers Science Center for New Organic Matter, College of Chemistry, Nankai University Tianjin 300071 China ligongyu@nankai.edu.cn.

Chemical science

|June 9, 2023

概括

这项研究研究了阿尔茨海默病 (AD) 中的粉样β (Aβ) 立体化学,发现特定的异构化Aβ42形式降低了Aβ毒性. 这一发现为了解和潜在地治疗AD病原体提供了新的途径.

科学领域:

神经科学是一个神经科学.
生物化学生物化学
分子生物学分子生物学

背景情况:

独特的粉样β (Aβ) 异型与阿尔茨海默氏症 (AD) 病原发生有很强的联系.
了解导致Aβ毒性的因素对于阿尔茨海默病研究至关重要.

研究的目的:

研究Aβ42立体化学,特别是Asp和Ser残留物的d-异体化对Aβ细胞毒性的影响.
评估自然存在的同质化Aβ形式作为模仿物,以评估它们对神经细胞的影响.

主要方法:

定制各种d-异体化Aβ42形式,从碎片到全长.
使用神经元细胞系进行细胞毒性的系统评估.
多维离子流动性质谱与复制品交换分子动力学模拟的整合.

主要成果:

在Aβ42中的Asp和Ser残留物中的co-d-epimerization,在N终端和核心区域,显著降低了细胞毒性.
观察到的毒性降低与Aβ42二次结构的差异性,域特异性紧缩和重塑有关.
在减少细胞毒性方面,d-异体化Aβ42形式作为有效的自然模仿剂.

结论:

立体化学修饰,特别是Aβ42中的Asp和Ser残留物的共同化,可以减轻Aβ毒性.
这些发现提供了关于Aβ毒性的结构基础的见解,并建议对阿尔茨海默病的潜在治疗策略.
这项研究强调了立体化学在Aβ聚合和神经毒性方面的重要性.

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