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基质刚度通过刺信号通路调节BMMSC的骨质分化

Chengyang Sun¹, Mengying Jin², Ying Lian¹

¹Department of Plastic and Cosmetic Surgery, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Henan, China.

The international journal of biochemistry & cell biology

|July 25, 2025

概括

基质的刚性显著促进骨髓介质干细胞 (BMMSC) 的骨质分化. 这种效应是由 (Hh) 信号通路介导的,突出显示了它在骨组织工程中的作用.

科学领域:

生物物理学的生物物理.
干细胞生物学干细胞生物学
生物材料科学生物材料科学

背景情况:

基质刚度是影响中细胞干细胞 (MSC) 行为的关键生物物理因素.
硬度调节MSC骨质分化的确切机制尚未完全理解.
了解这些机制对于推进骨组织工程和再生医学至关重要.

研究的目的:

调查基质刚度在调节骨髓介质干细胞 (BMMSCs) 的骨质分化中的作用.
阐明 (Hh) 信号通路在硬度驱动的骨质发生过程中的参与.
探索度调节生物材料在骨再生方面的潜力.

主要方法:

用RGD进行功能化的多甲基 (PDMS) 基板的制造,其硬度不同 (软,中,硬).
在具有不同硬度的基板上培养BMMSC,以评估细胞扩散,增殖和骨质分化.
评估性酸酶 (ALP) 表达和结形成作为骨质生成的标志物.
使用GANT61抑制 (Hh) 信号通路,以确定其在观察到的效应中的作用.

主要成果:

与软基质相比,在硬基质上培养的BMMSC显示细胞扩散和增殖的增强.
刚性基板显著上调性酸酶 (ALP) 表达和结节的形成.
刺 (Hh) 信号通路在刚性基板上被激活.
抑制Hh信号取消了基质刚性的对BMMSC骨质生成的积极影响.

结论:

基质刚性促进BMMSC骨质分化,这种分化方式取决于 (Hh) 信号通路.
这些发现为骨再生的机械生物学提供了新的见解.
该研究为设计度优化的生物材料提供了基础,用于有效的组织工程应用.

关键词:

在BMMSCs中,骨缺陷是一种骨缺陷.刺的信号传递方式骨质变异的分化骨质变异的分化基板的刚性基板的刚性

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