CELL METAB:清除衰老细胞不仅不能抗衰老,还有害健康?

2020-06-20 MedSci原创 MedSci原创

衰老细胞的积累可导致许多与年龄相关的表型和病理。因此,有人提出,去除衰老细胞可能会延长寿命。

衰老细胞的积累可导致许多与年龄相关的表型和病理。因此,有人提出,去除衰老细胞可能会延长寿命。

最近,研究人员生成了两个针对衰老的最佳特征标志物p16Ink4a的基因敲入小鼠模型。

使用遗传谱系追踪方法,研究人员发现,年龄诱导的p16高表达的衰老是一个缓慢的过程,在10-12个月龄左右表现出来。大多数p16高表达细胞是血管内皮细胞,主要在肝窦细胞(LSECs)中,较少的是巨噬细胞和脂肪细胞。

反过来,持续或急性消除p16高表达衰老细胞会破坏了血液-组织屏障,导致随后的肝脏和血管周围组织纤维化和健康恶化。

该研究数据还表明,衰老的LSECs在清除后不会被替换,在衰老的机体中具有重要的结构和功能作用。

反过来,延缓衰老或替换衰老的LSECs可以代表一个强大的延缓衰老的策略。

 

原始出处:

Laurent Grosse et al. Defined p16High Senescent Cell Types Are Indispensable for Mouse Healthspan, Cell Metabolism (2020). DOI:https://doi.org/10.1016/j.cmet.2020.05.002

 

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    2020-10-09 guojianrong
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    2021-01-30 一闲
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    2020-09-27 维他命

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