染色体成熟控制hMSC机制对动态压缩的响应
Farhad Chariyev-Prinz1,2, Ross Burdis1,2, Daniel J Kelly1,2,3,4
1Trinity Centre for Biomedical Engineering, Trinity Biomedical Sciences Institute, Trinity College Dublin, D02 R590 Dublin, Ireland.
Bioengineering (Basel, Switzerland)
|October 29, 2025
概括
仅靠动态压缩并不能诱导人类介质干细胞 (hMSCs) 中的体发生. 然而,将机械刺激与TGF-β3和高细胞密度相结合,可以支持软骨基质的产生和稳定的原体表型.
科学领域:
- 生物医学工程 生物医学工程
- 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:
- 动态压缩 (DC) 生物反应器模拟联合负载,用于研究人类介质干细胞 (hMSCs).
- 仅仅DC对体生成的充足性及其在成熟过程中与生长因子的相互作用尚未完全理解.
研究的目的:
- 调查单独的动态压缩 (DC) 是否可以诱导hMSCs中的chondrogenesis.
- 为了确定DC如何与TGF-β3相互作用,在不同阶段的chondrogenic诱导和构造成熟.
- 评估不同细胞密度的工程软骨结构的机械反应.
主要方法:
- 人类介质干细胞 (hMSCs) 在低 (LD) 和高 (HD) 细胞密度的纤维素水凝中被封装.
- 在不同的时间点,建筑物经过了动态压缩 (DC),有或没有TGF-β3处理.
- 分析了原体标记物 (SOX9,ACAN,COL2A1) 的基因表达.
主要成果:
- 单独使用DC可以轻微增加SOX9的表达,但不能诱导关键的软骨基因 (ACAN, COL2A1).
- 将直流与TGF-β3合,增强了体生成,特别是在HD结构中.
- 与LD结构不同的是,HD结构在增长因子撤销和DC后保持了冠状病毒基因表达.
结论:
- 仅靠机械刺激是不足以启动hMSCs中的chondrogenesis.
- 构造成熟和细胞密度显著影响对机械线索的反应.
- 动态压缩生物反应器可以成为软骨工程和预测体内移植性能的宝贵工具.
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