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在衰老的脊椎动物大脑中识别具有类和相分离特性的蛋白质聚合物

Itamar Harel¹, Yiwen R Chen², Inbal Ziv²

¹Department of Genetics, Stanford University, Stanford, CA 94305, USA; The Silberman Institute, the Hebrew University of Jerusalem, Givat Ram, Jerusalem 91904, Israel.

|May 29, 2024

概括

蛋白质聚合物具有类似的特性,在老年大脑中形成,在鱼中使用蛋白质组学来识别. RNA螺旋酶DDX5聚合和传播,可能会影响与年龄相关的认知衰退.

科学领域:

神经科学是一个神经科学.
分子生物学分子生物学
衰老研究研究衰老研究

背景情况:

蛋白质聚合是神经退行性疾病的一个关键特征.
在正常的大脑衰老过程中,类聚合物的存在尚不清楚.

研究的目的:

为了研究老化的脊椎动物大脑中蛋白质聚合物的形成和特性.
为了确定参与与年龄相关的聚合的特定蛋白质.

主要方法:

量化蛋白质组学在非洲的绿色鱼中得到了应用.
在鱼和老鼠大脑中验证了DDX5的聚合物样点.
进行了体外相位分离和酶活性试验.

主要成果:

富含类RNA结合蛋白质的蛋白质聚合物,包括DDX5,在衰老的大脑中积累.
在酵母中,DDX5形成类似聚合物的结构,在几代人中传播.
DDX5相分离与其聚合和酶活性有关,有可能成熟为非活性形式.

结论:

在正常的大脑衰老过程中形成类蛋白质聚合物.
DDX5的聚合和传播可能会导致年龄相关的认知衰退.

关键词:

CP: 细胞生物学细胞生物学科普:神经科学是什么意思尼·弗尔泽里 (N. Furzeri) 是一个聚合物聚合物聚合物衰老的衰老衰老的衰老杀鱼是一种杀鱼.阶段分离的阶段分离.

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