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自控制海马后突触组织,并在脆弱X综合征的小鼠模型中影响认知

Ziyan Zhang¹, Cameron Keyser¹, Yaxin Li²

¹Center for Gene Regulation in Health and Disease, Cleveland State University, Cleveland, OH, 44115, USA.

Molecular psychiatry

|September 10, 2025

概括

激活自会降解关键蛋白质,纠正突触缺陷,并在脆弱X综合征 (FXS) 模型中改善认知. 这揭示了自.

科学领域:

神经科学是一个神经科学.
细胞生物学细胞生物学
遗传学是一个遗传学.

背景情况:

失调的树突性脊柱形态与神经发育障碍,如脆弱X综合征 (FXS) 有关.
自,细胞降解过程,在FXS神经元下调,但其在突触病理学中的确切作用尚不清楚.

研究的目的:

在FXS的背景下,阐明自会影响突触组织和动因组合的机制.
调查激活自能否可以改善FXS模型中的突触和认知缺陷.

主要方法:

使用了Fmr1淘汰赛 (KO) 鼠标模型和来自FXS患者的人类神经元.
研究了真核细胞启动因子4G1 (eIF4G1) 和 postsynaptic密度蛋白-95 (PSD-95) 通过自的降解.
评估了自活性激活对 postsynaptic 组织,actin 组装和认知功能的影响.

主要成果:

发现激活的自会降解Fmr1KO小鼠的海马神经元和FXS患者衍生的神经元中的eIF4G1和PSD-95.
这种降解纠正了失调的 postsynaptic 组织和 actin 组合,这对突触成熟至关重要.
在Fmr1 KO小鼠的海马体中对自的中央激活恢复了actin动态,并改善了认知表现.
在人类的FXS神经元中,自活化正常化了异常的actin组合.

结论:

自在通过降解eIF4G1和PSD-95来调节结构性突触可塑性方面发挥着关键作用,从而影响了actin组装和突触组织.
针对自是一种潜在的治疗策略,用于FXS和其他神经发育障碍,其特点是突触异常.

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