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氨基酸β加速与年龄相关的全蛋白体蛋白质不溶性

Edward Anderton^1,2, Manish Chamoli³, Dipa Bhaumik⁴

¹The Buck Institute for Research On Aging, 8001 Redwood Blvd, Novato, CA, 94945, USA. eanderton@buckinstitute.org.

|May 16, 2024

概括

阿尔茨海默病 (AD) 蛋白质聚合与衰老有关. 粉样β (Aβ) 表达驱动广泛的蛋白质不溶性,类似于衰老,可能恶化AD和其他慢性疾病.

科学领域:

蛋白质稳定和衰老的作用
神经退行性疾病神经退行性疾病
分子生物学分子生物学

背景情况:

蛋白质静止的丧失,导致蛋白质聚合物的积累,是衰老的标志.
蛋白质不溶性是与年龄相关的神经退行性疾病的常见特征,如阿尔茨海默氏症 (AD),与粉样β (Aβ) 斑块相关.
目前的AD疗法往往忽视了泛化,衰老驱动的蛋白质不可溶性的作用.

研究的目的:

研究Aβ表达和与年龄相关的蛋白质不可溶性之间的关系.
为了确定"核心不溶性蛋白质组" (CIP) 以及它与AD病原和衰老的联系.
探索Urolithin A作为阿尔茨海默病和与年龄有关的疾病治疗干预的潜力.

主要方法:

在C. elegans中采用无偏的蛋白质组学方法.
分析由Aβ表达和正常衰老驱动的蛋白质不溶性.
人类全基因组关联研究 (GWAS) 来分析CIP.
在体内评估Aβ毒性和乌罗立A的作用.

主要成果:

在C. elegans中,Aβ表达诱导了全蛋白质不溶性,反映了衰老的不溶性蛋白质 (CIP).
该CIP富含影响Aβ毒性的蛋白质,这表明AD的前循环.
CIP蛋白与神经退行性疾病以及广泛的慢性与年龄相关疾病 (CARDs) 有关.
发年保护性代谢物乌罗素A有效降低了Aβ的毒性.

结论:

Aβ表达会加剧与年龄相关的蛋白质不溶性,从而导致AD的发病.
CIP代表了老龄化,AD和其他与年龄有关的慢性疾病的共同脆弱性.
乌罗立A对针对痴呆症和与年龄有关的疾病的临床试验有希望.

关键词:

粉样蛋白 β 是一种粉样蛋白.蛋白质不可溶性蛋白质不可溶性蛋白质稳定性蛋白质稳定性

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