综合性分析揭示了3D硬度对干细胞命运的多种影响
Muxin Yue1,2, Yunsong Liu1,2, Ping Zhang1,2
1Department of Prosthodontics, Peking University School and Hospital of Stomatology, Beijing 100081, China.
International journal of molecular sciences
|June 10, 2023
概括
细胞外矩阵的刚性决定了干细胞的命运. 硬的环境促进骨质生成,而软的环境通过改变细胞代谢和基因表达来增强脂肪生成/染色体分化.
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:
- 多能干细胞异质性对于组织发育至关重要.
- 骨髓介质干细胞 (BMMSCs) 根据其利基区分为各种细胞类型.
- 细胞外矩阵 (ECM) 刚度对干细胞命运的影响尚未完全理解.
研究的目的:
- 为了研究ECM刚性如何影响BMMSC命运.
- 阐明分子机制,包括转录和代谢信号,是基因干细胞分化的基础.
- 为了确定关键的信号网络调节干细胞命运决策,以响应机械线索.
主要方法:
- 采用了全基因转录组学和非向代谢组学.
- 在ECM上培养了BMMSC,其刚度各不相同 (软: 710 kPa;硬: 3945 kPa).
- 在实验室中对性反应基因进行了验证.
主要成果:
- 刚性ECM (3945 kPa) 调高了氨基酸-tRNA生物合成的调节,并促进了骨质生成.
- 软ECM (710kPa) 增加了不和脂肪酸生物合成,糖氨基甘油沉积,并增强了基/基分化.
- 确定了调节干细胞命运的性反应基因网络.
结论:
- ECM度是BMMSC命运的一个关键决定因素.
- 硬度依赖的代谢和转录变化介导干细胞的分化.
- 这项研究为组织工程策略提供了分子基础,利用生物力学特性控制干细胞行为.
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