端粒缩短会诱导hiPSC衍生的神经元和星体细胞中的与衰老相关的表型
Jasmine Harley1, Munirah Mohamad Santosa1,2, Chong Yi Ng1
1Institute of Molecular and Cell Biology, A*STAR Research Entities, Singapore, 138673, Singapore.
Biogerontology
|November 21, 2023
概括
由于失去端粒酶逆转录酶 (TERT) 的原因,端粒缩短会诱导中枢神经系统细胞的衰老特征. 这一突破为研究神经退行和衰老提供了一个新的模型.
科学领域:
- 细胞生物学 细胞生物学
- 神经科学是一个神经科学.
- 遗传学 是一个遗传学.
背景情况:
- 端粒缩短是细胞衰老的一个关键指标.
- 端粒酶逆转录酶 (TERT) 维持了端粒的长度.
- 对中枢神经系统 (CNS) 缺乏体外衰老模型阻碍了研究.
研究的目的:
- 使用人类诱导的多能干细胞 (hiPSCs) 为中枢神经系统细胞创建一个体外衰老模型.
- 调查端粒缩短是否会在中枢神经系统细胞中诱导与年龄相关的表型.
主要方法:
- 利用CRISPR/Cas9生成具有受损端粒酶功能和缩短端粒的hiPSCs.
- 将这些hiPSC分化为运动神经元和天体细胞.
- 评估了与年龄相关的特征,如衰老,炎症和DNA损伤.
主要成果:
- 缩短的端粒诱导了细胞衰老,炎症和运动神经元和天体细胞中的DNA损伤.
- 观察到细胞类型特定的与年龄相关的形态变化.
- 证明了TERT和端粒长度在神经前体细胞增殖和神经元分化中的关键作用.
结论:
- 端粒缩短有效地诱导中枢神经系统细胞的衰老表型,验证了其在衰老研究中的使用.
- 这项研究为研究与年龄相关的中枢神经系统衰退和神经退行性疾病提供了一个新的体外模型.
- 突出了端粒维护在神经细胞功能和衰老中的基本作用.
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