NATURE:你知道吗?每个器官都有自己独特的衰老模式

2020-07-19 MedSci原创 MedSci原创

研究人员展示了不同组织中的基因表达转变如何与血浆中相应的蛋白质水平高度相关,从而可能导致系统性循环的老化。

老龄化是全世界疾病和死亡的最大原因,了解相关过程可以极大地提高生活质量。虽然已经确定了老化损害的主要类别,如细胞间通信的改变,蛋白质平衡的损伤,和线粒体功能的破坏,但是我们对于这些有害的过程与器官内和器官之间的异常复杂的相互作用,以及一个全面的,全机体的老化动态还不完全了解。

最近,在小鼠生命周期的10个年龄段,研究人员进行了17个器官的批量RNA测序和血浆蛋白质组学,并将这些发现与Tabula Muris Senis2-或 "小鼠老化细胞图谱"中的数据进行了整合。

研究人员揭示了老化过程中基因表达的线性和非线性变化,相关基因聚集在一致的轨迹组中,具有连贯的生物学功能--包括细胞外基质调控、未折叠蛋白结合、线粒体功能以及炎症和免疫反应。

值得注意的是,这些基因组在不同组织中表现出相似的表达,仅在表达的幅度和起始年龄上有所不同。

免疫细胞的广泛激活尤其明显,并在中年时期首先在白色脂肪库中检测到。单细胞RNA测序证实了脂肪组织中T细胞和B细胞的积累--包括表达免疫球蛋白J的浆细胞。这些细胞也同时在不同器官中积累。

最后,研究人员展示了不同组织中的基因表达转变如何与血浆中相应的蛋白质水平高度相关,从而可能导致系统性循环的老化。

这些数据共同证明了类似的但非同步的器官间和器官内的老化进展,为追踪老年健康状况下降的系统来源提供了基础。

 

原始出处:

Nicholas Schaum et al. Ageing hallmarks exhibit organ-specific temporal signatures, NATURE (2020).

 

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    2021-02-22 liye789132251
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    2020-08-27 14818eb4m67暂无昵称

    学习了

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    2020-08-16 ms7000001456500399

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    2020-07-19 wangzheng00

    学习

    0

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