类似衰老的与边界相关的巨细胞通过在微质中介于偏细胞衰老的诱导来调节认知衰老
Mengyan Hu1,2, Xinmei Kang1, Zhiruo Liu1
1Department of Neurology, Mental and Neurological Disease Research Center, the Third Affiliated Hospital of Sun Yat-sen University, Guangzhou, China.
Nature aging
|September 10, 2025
概括
大脑衰老加速与衰老的细胞. 这些细胞的迁移体传播衰老,恶化认知衰退. 阻断迁移体改善了老年小鼠的记忆,提供了一个新的治疗点.
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
- 免疫学 免疫学 免疫学
背景情况:
- 细胞衰老是衰老的标志,也是阿尔茨海默氏症等神经系统疾病的危险因素.
- 衰老细胞通过膜信号传播衰老,涉及像迁移体这样的结构.
- 迁移体是细胞迁移期间细胞间通信的关键媒介.
研究的目的:
- 研究迁移体在大脑衰老和衰老中的作用.
- 探索边界相关巨细胞 (BAMs) 在大脑衰老中的功能.
- 确定与年龄相关的认知衰退的潜在治疗点.
主要方法:
- 在老年小鼠中检查了BAMs与衰老相关的特性.
- 分析了老化样BAMs的迁移体生产和内容.
- 研究了BAM衍生型迁移体对微质细胞的影响.
- 使用 Tspan4 向 siRNA 封装脂质体来阻止迁移体诱导.
- 在治疗后对老年小鼠进行认知功能评估.
主要成果:
- 在早期大脑衰老中,BAMs获得与衰老相关的特性,可能是由于粉样β暴露.
- 类似衰老的BAMs产生携带衰老信号的迁移体,包括巨细胞的亡抑制剂.
- 微质细胞接收这些迁移体,从而通过CD16激活抑制细胞亡和诱导衰老.
- 阻止迁移体的产生改善了老年小鼠的认知缺陷.
结论:
- 迁移体是衰老大脑中衰老信号的关键调解者.
- 由BAM衍生的迁移体有助于神经炎症和认知衰退.
- 向迁移体生产代表了与年龄相关的神经系统疾病的一种有前途的老化疗法.
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