在人类关节冠状细胞的复制衰老过程中发生的转录组变化
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 55905, USA.
International journal of molecular sciences
|November 27, 2024
概括
软骨细胞中的细胞衰老揭示了与骨关节炎 (OA) 相关的分子变化. 这项研究模拟了正常和OA软骨细胞的衰老,以了解OA的发展.
科学领域:
- 生物医学科学 生物医学科学
- 细胞生物学 细胞生物学
- 骨关节炎研究 骨关节炎研究
背景情况:
- 衰老是骨关节炎 (OA) 的主要危险因素,但精确的分子联系仍然难以捉摸.
- 软骨细胞对软骨健康至关重要,在体内很少分裂,但在体外表现出复制性衰老,为衰老研究提供了一个模型.
- 了解冠状细胞衰老对于阐明OA的发病过程至关重要.
研究的目的:
- 为了研究在复制性衰老过程中人类关节性肌细胞的转录基因变化.
- 为了比较与衰老相关的正常肌肉细胞的变化与由骨关节炎 (OA) 软骨产生的变化.
- 确定连接状细胞衰老和OA发展的分子通路.
主要方法:
- 从正常和OA软骨到Hayflick极限,建立和分培养人类关节软骨细胞培养物.
- 早期和晚期通道红细胞的散装RNA测序,以分析转录组形状.
- 差异基因表达分析以确定矩阵合成,降解,炎症和衰老相关分泌表现型 (SASP) 的变化.
主要成果:
- 早期的OA冠状细胞表现出衰老的表型,与正常的冠状细胞不同.
- 所有的冠状细胞培养物都表现出衰老,并且由于复制性疲劳而失去软骨颗粒形成的能力.
- 在早期和晚期细胞之间以及正常和OA衍生的细胞之间观察到显著的基因表达差异,特别是在与矩阵代谢,炎症和SASP相关的基因中.
结论:
- 在实验室中,慢性细胞复制性衰老重复了与OA相关的与衰老相关的分子变化.
- 在OA冠状细胞中,明显的转录组形状表明,固有的衰老差异有助于疾病.
- 对状细胞衰老机制的进一步研究可能为骨关节炎提供新的治疗点.
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