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介酶体 stromal 细胞通过脊素调节 YAP 以模仿软骨发育,并基于脱细胞化基质支架构建软骨器官
Jiayi Zhu1,2, Wanqing Lun1,2, Qi Feng2,3,4,5
1School of Medicine, South China University of Technology, Guangzhou 510006, P. R. China. mcqtli@scut.edu.cn.
Journal of materials chemistry. B
|July 13, 2023
概括
脚手架的刚性和YAP活动调节干细胞分化以修复软骨. 控制YAP活动时间对于产生质软骨和预防纤维化至关重要.
科学领域:
- 生物材料科学 生物材料科学
- 干细胞生物学 干细胞生物学
- 组织工程是组织工程.
背景情况:
- 细胞外基质 (ECM) 刚性影响YAP活动,影响骨发育和修复中的干细胞分化.
- 软骨发生和质软骨维护中的支架的机械生物学需要进一步阐明有效的关节软骨修复.
研究的目的:
- 为了研究YAP亚细胞局部化和早期产后生长期间的软骨结构之间的关系.
- 为了确定脚手架刚度对氨酸软骨形成和YAP活动中介酶干细胞 (MSCs) 的影响.
- 探索YAP活动时间在调节MSC向氨酸胆细胞的分化和预防缩/纤维化中的作用.
主要方法:
- 在产后发育过程中分析YAP局部与软骨结构的关系.
- 在MSC培养中使用不同硬度 (2-33kPa) 的脱细胞化软骨支架.
- 用维特波芬药理上抑制YAP活性,以模拟发育变化和评估差异化结果.
- 使用脱细胞化矩阵支架构建素软骨器官.
主要成果:
- YAP亚细胞局部化与早期产后发育期间的软骨结构和组织变化有关.
- 脚手架的刚性显著影响质软骨的形成和YAP活动在区分MSCs.
- 抑制YAP的时间对于将MSC指向氨酸胆细胞和抑制过度缩小和纤维化至关重要.
- 通过使用脱细胞化矩阵支架,成功构建了氨酸软骨器官.
结论:
- YAP在干细胞的*体外*同原体分化中发挥着关键作用.
- 生物化学和机械线索都严格调节YAP在体生成过程中的活动.
- 了解支架机械生物学和YAP调节是推进关节软骨修复策略的关键.
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