Circ Res:多成像技术测定人iPSC来源的心肌细胞收缩时的机械输出

2017-04-14 MedSci MedSci原创

每次搏动期间心肌细胞通过收缩机制产生维持心脏功能所必需的机械输出,如通过调控肌原纤维缩短肌肉机制。人来源的诱导多能干细胞可以分化为心肌细胞,当将其微图形化时可以更直观的模拟心脏收缩时的机械输出。量化这些细胞的机械输出可以用来测定心脏活动。来自斯坦福大学的学者试图构建一个计算平台来整合分析方法,从显微镜视频中量化单个微图形心肌细胞的机械输出。研究者将包含荧光微珠的可变形聚丙烯酰胺底物上的人类诱导多能

每次搏动期间心肌细胞通过收缩机制产生维持心脏功能所必需的机械输出,如通过调控肌原纤维缩短肌肉机制。人来源的诱导多能干细胞可以分化为心肌细胞,当将其微图形化时可以更直观的模拟心脏收缩时的机械输出。量化这些细胞的机械输出可以用来测定心脏活动。

来自斯坦福大学的学者试图构建一个计算平台来整合分析方法,从显微镜视频中量化单个微图形心肌细胞的机械输出。

研究者将包含荧光微珠的可变形聚丙烯酰胺底物上的人类诱导多能干细胞分化而来的心肌细胞微图案化。研究收获单个搏动细胞、收缩期微珠位移和荧光标记的肌原纤维的影像。独立分析这些影像获取成像的单细胞的机械输出参数。研究者还开发了新方法量化移动肌原纤维影像中的肌节长度,并分析具有收缩缺陷的细胞失去同步跳动。研究者检测药物诱导的机械输出和表达低水平肌球蛋白结合蛋白C的细胞的变化来测试这个计算平台。

本方法可检测人诱导多能干细胞分化而来的心肌细胞的心脏功能,并确定出收缩参数用以阐明心肌细胞功能变化的基础机制。该平台将适用于未来研究突变及药物对心脏功能的影响。

原始出处:


Ribeiro AJ, Schwab O,et al. Multi-Imaging Method to Assay the Contractile Mechanical Output of Micropatterned Human iPSC-Derived Cardiac Myocytes. Circ Res. 2017 Apr 11. pii: CIRCRESAHA.116.310363.

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    2017-04-16 chengjn
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    2017-04-16 gjsgj
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    2017-04-16 neurosurgeon
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