NATURE:微环境构成中枢神经干细胞衰老的基础

2019-08-15 海北 MedSci原创

由于成体干细胞和祖细胞群的功能丧失,衰老导致组织再生能力的下降。

由于成体干细胞和祖细胞群的功能丧失,衰老导致组织再生能力的下降。

一个例子是广泛和丰富的中枢神经系统(CNS)多能干细胞群体(称为少突胶质细胞祖细胞(OPCs))的再生能力的恶化。这种功能丧失的一个相对被忽视的潜在来源是干细胞微环境” - 一组细胞外在线索,包括化学和机械信号。

最近,研究人员发现,OPC微环境随着年龄的增长而变硬,并且这种机械变化足以引起与年龄相关的OPC功能丧失。

使用生物和合成支架来模拟年轻大脑的僵硬,研究人员发现,在这些支架上培养的分离的老化OPCs在分子和功能上是再生的。当研究人员破坏机械信号传导时,OPCs的增殖和分化率增加。

研究人员将机械响应离子通道PIEZO1识别为OPC机械信号的关键介质。抑制PIEZO1在体内覆盖机械信号,并允许OPCs在衰老的CNS中维持活性。

研究人员还表明,PIEZO1CNS发育过程中对于调节细胞数量很重要。

因此,研究人员表示,组织硬度是OPCs衰老的关键调节因子,并提供成人干细胞和祖细胞功能随年龄变化的见解。该研究结果不仅对于再生疗法的发展很重要,而且对于理解衰老过程本身也很重要。


原始出处:

Michael Segel et al. Niche stiffness underlies the ageing of central nervous system progenitor cells. Nature, 2019; DOI: 10.1038/s41586-019-1484-9


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    2019-10-27 liye789132251
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    2019-08-18 独孤立克

    干细胞是热点,但是进入临床仍然需要时间和临床疗效验证哦

    0

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