在与年龄有关的心脏疾病中对p16阳性树皮细胞的表征
Taiki Morimura1,2, Teh-Wei Wang1,2, Satoshi Kawakami1
1Division of Cancer Cell Biology.
Journal of biochemistry
|February 18, 2026
概括
与衰老相关的纤维细胞 (p16+纤维细胞) 在老年心脏中驱动心脏纤维化. 消除这些细胞可以逆转与年龄相关的纤维化,为心力衰竭提供新的治疗点.
科学领域:
- 心血管生物学 心血管生物学
- 衰老研究研究 衰老研究
- 细胞衰老 细胞衰老
背景情况:
- 老化的心脏表现出纤维化和缩等结构变化,导致功能衰退和心力衰竭.
- 包括纤维细胞在内的心脏侧膜细胞与与年龄有关的心脏变化有关,特定的子集可能会产生更大的影响.
研究的目的:
- 研究p16阳性 (p16+) 老化相关细胞在与年龄有关的心脏纤维化中的作用.
- 确定特定的分子通路和参与心脏衰老的细胞类型.
主要方法:
- 单细胞RNA测序在老年p16-Tom小鼠上进行,以标记和分析p16+细胞.
- 转录组分析在p16+纤维细胞中发现了丰富的信号通路.
- 在年龄较大的p16-Col1a2-LRTD小鼠中进行了p16+纤维细胞的选择性消除,以评估功能影响.
主要成果:
- 与p16-纤维细胞相比,TGF-β信号传递和BMP4在p16+纤维细胞中显著上调.
- 在p16+纤维细胞中的上调途径可能促进了原体基因表达 (Col4a1,Col5a3).
- 选择性消除p16+纤维细胞有效地改善了老年小鼠的心脏纤维化.
结论:
- p16+纤维细胞是年龄相关心脏纤维化的关键驱动因素.
- 对p16+纤维细胞的转录组签名可以帮助识别人类纤维细胞子集,这些子集有助于导致与年龄有关的心脏疾病,如扩张性心肌病.
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