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第1组mGluR刺激挽救了神经元中APOE4介导的翻译缺陷

Bindushree K Radhakrishna^1,2, Ahamed P Kaladiyil¹, Anushree Chakraborty³

¹Centre for Brain Research, Indian Institute of Science, Bangalore, India.

Life science alliance

|November 11, 2025

概括

阿波利波蛋白E4 (APOE4) 损害神经元蛋白质合成,这是阿尔茨海默病的关键因素. 第1组甲基酸盐受体 (mGluRs) 可以通过mTOR途径拯救这种损伤,这表明APOE4载体是治疗点.

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
遗传学是一个遗传学.

背景情况:

Apolipoprotein E4 (APOE4) 是阿尔茨海默病 (AD) 的一个主要遗传风险因素.
APOE4 损害神经元信号传递和蛋白质合成,导致神经退行和突触功能障碍.
第1组甲基酸盐受体 (mGluRs) 对突触可塑性和蛋白质合成至关重要.

研究的目的:

为了研究APOE4对神经元蛋白质合成对mGluR刺激的反应的影响.
为了确定基底的分子机制mGluR介导的救援APOE4诱导的赤字.
探索mGluR激活在APOE4相关认知障碍中的治疗潜力.

主要方法:

来自Sprague-Dawley大鼠胚胎的原发皮质神经元被用APOE4.4治疗.
测量了神经元蛋白质合成和突触活性.
使用拉巴胺素治疗,评估了哺乳动物目标拉巴胺素 (mTOR) 途径的作用.
使用mGluR刺激来检查救援效应.

主要成果:

暴露在APOE4中抑制了蛋白质合成,并降低了神经元中的突触活性.
mGluR刺激挽救了由APOE4.4引起的蛋白质合成抑制和突触活动减少.
救援效应取决于RPS6的酸化,这是mTOR通路的下游目标.
这种mGluR介导的救援独立于APOE4诱导的信号缺陷.

结论:

1组mGluR刺激可以有效地抵消APOE4引起的神经元蛋白质合成和突触活动的损害.
mTORC1通路在调解这种救援效果方面发挥着至关重要的作用.
激活mGluR是一种潜在的治疗策略,可以减轻APOE4对阿尔茨海默病中的突触可塑性和认知的有害影响.

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