直接重新编程小鼠纤维细胞到骨质细胞类细胞使用Runx2/Dlx5因子在工程硬体水凝上
Junwei Zhang1, Yao Wang1, Jing Guo1
1National Engineering Research Center for Biomaterials, Sichuan University, Chengdu 610064, PR China.
ACS applied materials & interfaces
|December 16, 2023
概括
这项研究表明,来自原涂层水凝的机械线索显著增强直接细胞重编程到骨形成细胞. 这种方法提高了潜在细胞疗法的效率和功能成熟度.
科学领域:
- 生物材料科学 生物材料科学
- 细胞生物学 细胞生物学
- 再生医学是一种再生医学.
背景情况:
- 直接细胞重编程在效率和功能成熟度方面面临挑战.
- 目前的方法主要使用生物化学信号,机械线索未得到充分利用.
- 开发增强骨质分化的方法对于骨再生至关重要.
研究的目的:
- 为了研究来自原涂层聚烯胺 (PAM) 水凝的机械线索对纤维细胞直接重编程成骨质样细胞的影响.
- 探索机械刺激和非病毒载体介导基因传递的协同效应.
- 阐明机械暗示增强骨质性重编程的潜在分子机制.
主要方法:
- 使用原蛋白涂层的PAM水凝,其刚度为40kPa,模仿骨组织.
- 采用非病毒载体来增强小鼠纤维细胞中骨质性转录因子的表达.
- 在试验室中评估了骨质分化,细胞增殖和矩阵矿化.
- 在体内进行动物研究以评估骨再生和宫外骨质生成.
- 分析了actomyosin收缩和RhoA-ROCK信号通路的参与.
主要成果:
- 在40kPa的水凝上培养纤维细胞增强了骨质转录因子的过度表达,并增加了骨质细胞样细胞产量.
- 机械线索和转录因子过度表达之间的协同效应导致骨质功能和骨矿物质基质生产的改善.
- 在体内研究表明,通过在水凝上重新编程的细胞,加速了骨再生和刺激了宫外骨质生成.
- 机制分析揭示了actomyosin收缩和RhoA-ROCK通路在增强染色质重塑,核转位和表观遗传转换方面的关键作用.
结论:
- 来自生物材料基质的机械线索可以显著提高直接细胞重编程的效率和功能.
- 优化机械环境和基因操纵的结合为细胞治疗和组织再生提供了一个有希望的策略.
- 了解机械转导通路为改善细胞重编程和再生医学策略提供了新的目标.
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