矩阵硬化通过降低HDAC3的调节促进了状细胞衰老和骨关节炎的发展
Bowen Fu1,2,3, Jianlin Shen4,5, Xuenong Zou6
1Guangdong Medical Innovation Platform for Translation of 3D Printing Application, The Third Affiliated Hospital, Southern Medical University, Guangzhou, 510630, Guangdong, China.
Bone research
|May 24, 2024
概括
软骨的衰老会使细胞外基质 (ECM) 变硬,加速软骨细胞衰老和膝关节关节炎 (KOA). 通过刚性ECM降低基因组脱乙酶3 (HDAC3) 的下调,激活了线粒,恶化了KOA. 恢复HDAC3可以缓解OA.
科学领域:
- 生物医学工程 生物医学工程
- 机械生物学 机械生物学
- 骨关节炎研究 骨关节炎研究
背景情况:
- 细胞外矩阵 (ECM) 硬是软骨衰老的标志,也是膝关节关节炎 (KOA) 的关键特征.
- 对于ECM硬化对软质细胞和分子通路的下游影响仍然不完全理解.
- 了解这些机械传导通路对于开发新型关节炎 (OA) 疗法至关重要.
研究的目的:
- 研究表观遗传调节的作用,特别是基因组脱乙酶3 (HDAC3) 和帕金的作用,在状细胞对ECM刚性的反应中.
- 阐明ECM硬化影响状细胞衰老并导致KOA病变的机制.
- 探索调节OA中的HDAC3水平的治疗潜力.
主要方法:
- 模仿生理和病理性软骨硬性使用聚甲基 (PDMS) 基板.
- 在不同硬度的基板上在体外培养胆细胞,以评估衰老和分子变化.
- 使用腺相关病毒 (AAV) 载体进行关节内注射,以恢复活体中老化性肌细胞中的HDAC3表达.
- 在小鼠模型中评估骨关节炎的进展和软骨细胞表型.
主要成果:
- 在实验室中,ECM硬化加速了冠状细胞衰老.
- 硬度诱导的HDAC3的ECM下调导致帕金乙烯化,过度食,并加速了小鼠的冠状细胞衰老和OA.
- 在小鼠中,关节内HDAC3 AAV注射逆转了与年龄相关的冠状细胞表型,并减轻了OA症状.
结论:
- 帕金基因通过HDAC3的表观遗传调节是一种新型的机械敏感通道,受ECM刚性的影响.
- 经皮膜硬化会启动致病性机械传导信号,导致帕金乙烯化,过度活化线粒细胞和状细胞损伤.
- 修改ECM的物理特性,特别是通过恢复HDAC3水平,为膝关节骨关节炎提供了潜在的治疗策略.
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