在人类关节软骨细胞的复制性衰老过程中的转录组变化
Aysegul Atasoy-Zeybek1, Gresin P Hawse1, Christopher V Nagelli1,2
1Musculoskeletal Gene Therapy Research Laboratory, Department of Physical Medicine and Rehabilitation, Mayo Clinic, Rochester, MN, USA.
bioRxiv : the preprint server for biology
|November 21, 2023
概括
人体软骨细胞中的细胞衰老改变了基因表达,影响了细胞外矩阵周转和衰老相关的分泌表型,特别是在骨关节炎样本中.
科学领域:
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
- 基因组学就是基因组学.
背景情况:
- 骨关节炎 (OA) 是全球残疾的主要原因,衰老是主要的危险因素.
- 准确的分子机制将衰老与OA病原体联系在一起仍然不完全理解.
- 人类关节性软骨细胞中的复制性衰老为研究与年龄相关的细胞变化提供了一个模型.
研究的目的:
- 为了识别与复制性衰老相关的人类关节性软骨细胞的转录基因变化.
- 为了比较早期和晚期通道性肌细胞之间的基因表达特征,包括来自OA和健康捐赠者的基因表达特征.
- 研究细胞外矩阵 (ECM) 周转和与衰老相关的分泌表型 (SASP) 的与年龄相关的变化.
主要方法:
- 大量RNA测序是在三位捐赠者 (两个OA,一个健康) 的早期和晚期人类关节性肌细胞上进行的.
- 主要成分分析 (PCA) 和差异基因表达 (DEG) 分析用于识别与年龄相关的转录组变化.
- 层次聚类分析了表达模式,重点关注ECM周转和SASP相关的转录.
主要成果:
- 在PCA中,早期和晚期冠状细胞之间有明显的分离,这表明了与年龄相关的显著基因表达差异.
- 晚期通路细胞始终显示Col2A1和ACAN的下调,MMP19,ADAMTS4和ADAMTS8的上调.
- 在OA样本的晚期通道性肌细胞中,SASP成分 (例如IL-1α,IL-6,p16INK4A) 显著上调.
- 路径分析揭示了OA中性别之间的共享路径 (ECM组织,原形成),细胞周期调节和神经发育的性别特异性差异.
结论:
- 人体软体细胞中的细胞衰老会诱导显著的转录基因变化,包括改变的ECM组成和SASP激活.
- 这些与年龄相关的变化在骨关节炎患者的软骨细胞中加剧.
- 了解这些分子通路为骨关节炎的衰老过程提供了洞察力,并突出了潜在的性别特异性治疗点.
关键词:
介质蛋白-1 介质蛋白-1 的作用.在RNA测序过程中,RNA测序老化的老化 衰老的老化细胞表型的形成 细胞表型的形成冠状细胞衰老 衰老冠状腺细胞 (chondrocytes) 是一种体内细胞.基因表达的基因表达方式骨关节炎是一种关节炎.复制性衰老是一种复制性衰老.翻译学 翻译学 翻译学 翻译学更多相关视频
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