衰老的人类骨肌肉的多模式细胞图谱
Yiwei Lai1,2, Ignacio Ramírez-Pardo3,4, Joan Isern4
1BGI Research, Hangzhou, China.
Nature
|April 22, 2024
概括
科学家对15至99岁的人类骨肌肉细胞进行了测绘, 这揭示了分子变化,并确定了应对肌肉衰减 (肉症) 的干预目标.
科学领域:
- 老年学和分子生物学
- 骨肌肉生理学
- 表观遗传学和转录学
背景情况:
- 肌肉缩和功能衰退是衰老和虚弱的关键方面,对患病率和死亡率有重大影响.
- 了解肉衰老的分子基础对于衰老研究至关重要,但研究骨肌肉异质性和获得人体样本的挑战阻碍了进展.
研究的目的:
- 创建一个全面的单细胞和单核转录和染色质可访问性地图的人类四肢骨肌肉.
- 在广泛的年龄范围内描述与衰老,虚弱和肉眼衰弱相关的细胞和分子变化.
- 鉴定影响肉病易感性的表观遗传和遗传因素.
主要方法:
- 从人类四肢骨肌肉中生成大规模的单细胞/单核转录和染色质可访问性数据集.
- 分析了超过387,000个15至99岁的个体的细胞/细胞核,
- 转录基因,表观基因和遗传数据的整合,以确定肉类的分子机制和易感性标记.
主要成果:
- 详细描述衰老过程中的细胞群动态,包括老年人中新细胞群的出现.
- 在与衰老相关的转录和表观遗传层面确定细胞特异性和多细胞网络变化.
- 通过与遗传数据进行交叉比较,发现了与皮病易感性相关的关键染色体结构元素.
结论:
- 这项研究为人类骨肌提供了前所未有的分子图谱.
- 鉴定出与年龄相关的细胞和分子变化为人们提供了了解缩症的机制.
- 这些发现为开发针对性医疗,药物和生活方式干预的基础.
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