基质嵌套指导人体多能干细胞的囊形态发生,没有3D细胞外矩阵覆盖
Yun-Ping Chen1, Yue Shao1, Peng-Cheng Chen1
1Institute of Biomechanics and Medical Engineering, Applied Mechanics Laboratory, Department of Engineering Mechanics, Tsinghua University, Beijing 100084, China.
Acta biomaterialia
|September 2, 2023
概括
人类多能干细胞 (hPSCs) 在软基质上自组织成3D囊,由基质嵌套和细胞力学指导,不需要3D细胞外基质 (ECM). 这揭示了新的组织形态发生机制.
科学领域:
- 发展生物学 发展生物学
- 干细胞生物学 干细胞生物学
- 生物物理学的生物物理.
- 组织工程是组织工程.
背景情况:
- 了解人类胚胎发育需要破译干细胞自我组织成组织.
- 目前用于生成3D组织模型的方法通常依赖于3D细胞外矩阵 (ECM) 叠加.
- 2D基质影响干细胞自我组织成3D结构的机制尚未完全理解.
研究的目的:
- 研究人类多能干细胞 (hPSCs) 在二维软弹性基质上的3D囊的自我组织.
- 阐明基质特性和细胞矩阵相互作用在指导hPSC形态发生过程中的作用.
- 为了确定参与基质诱导的囊形成的关键信号通路.
主要方法:
- 在不同硬度的2D软弹性基板上培养hPSCs.
- 使用理论建模来预测和分析细胞基质机械相互作用.
- 研究ROCK-Myosin II途径在囊发生过程中的参与.
主要成果:
- hPSCs在没有3D ECM的软基质上自我组织成3D囊,模仿人体上皮质囊袋.
- 由细胞粘附和机械相互作用驱动的基质嵌套被确定为3D组装和极化的一个关键因素.
- 发现ROCK-Myosin II通路的激活对于基质化和囊形态发生至关重要,与正规机制不同.
结论:
- 软基板可以通过基板嵌套和机械传导诱导hPSC自我组织成3D囊.
- 这个过程涉及独特的形态机械信号,与传统的基于3D ECM的方法不同.
- 研究结果表明,基于机械的策略,可以生成hPSC衍生的早期人类胚胎生成模型.
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