合成水凝基质用于人类诱导的多能干细胞终极内皮分化
Adriana Mulero-Russe1, Ana Mora-Boza2, Elijah N Marquez1
1Petit Institute for Bioengineering and Bioscience, Georgia Institute of Technology, Atlanta, GA, USA; School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, Atlanta, GA, USA.
Biomaterials
|November 6, 2024
概括
本研究介绍了一种定义的PEG-水凝,用于人类诱导的多能干细胞 (hiPSC) 分化成最终内皮 (DE). 这种合成矩阵为再生医学提供了MatrigelTM的可翻译替代品.
科学领域:
- 干细胞生物学 干细胞生物学
- 生物材料科学是生物材料的科学.
- 再生医学是一种再生医学.
背景情况:
- 人类诱导的多能干细胞 (hiPSCs) 分化成多个细胞系,包括最终内皮 (DE),这对再生医学至关重要.
- 目前的DE差异化协议通常依赖于MatrigelTM,一种异源和未定义的矩阵,阻碍了临床应用.
- 细胞外矩阵特性显著影响干细胞命运和分化结果.
研究的目的:
- 开发和表征一个完全定义的,合成的水凝基质,用于高效的hiPSC衍生DE差异化.
- 评估矩阵性质的作用,特别是粘性和刚性,在引导hiPSC分化向DE的过程中.
- 为了确定关键的分子调节器,如整合素和焦粘附激酶 (FAK) 活动,参与了这种差异化过程.
主要方法:
- 基于聚乙烯甘醇 (PEG) 的水凝配方的选,具有不同的粘合性 (例如,循环RGD) 和刚度 (1.04.0 kPa).
- 使用无血清商业套件评估hiPSC分化成DE的效率.
- 在DE分化过程中对整合素和综合素受体表达的时间分析.
- 调查焦粘附激酶 (FAK) 活动在hiPSC扩散和DE分化中的作用.
主要成果:
- 一个定义的PEG-水凝与循环RGD功能化成功支持hiPSC到DE分化.
- 基板刚度的增加与DE差异化效率的更高线性响应相关.
- 在DE谱系规范过程中,观察到整合素和综合素受体的时间表达模式.
- 确定FAK活动是hiPSC增长和DE差异化效率的调节者.
结论:
- 一个完全定义的PEG-hydrogel矩阵作为合成,临床可转化替代MatrigelTM用于hiPSC衍生的DE分化.
- 矩阵特性,包括呈现和刚性,对于优化DE分化至关重要.
- 了解受体动力学和像FAK激活这样的信号通路,可以了解控制干细胞命运的方法.
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