Sci Rep:局部机械力对人类胚胎干细胞最终转化的影响

2018-09-09 MedSci MedSci原创

机械力在影响人类胚胎干细胞(hESC)转化中起着关键作用。然而,局部机械力如何影响体外hESC的行为仍尚未完全明了。在这里,我们使用超声(US)技术,声学镊子细胞计数(ATC),通过整合素结合的微泡(MBs)将靶向的环状亚细胞力应用于hESCs。 结果显示,ATC介导的循环力对集落边缘附近的hESCs施加30分钟诱导整个集落的即刻反应,表明细胞-细胞连接在hESCs对ATC施加的力的机械响应

机械力在影响人类胚胎干细胞(hESC)转化中起着关键作用。然而,局部机械力如何影响体外hESC的行为仍尚未完全明了。在这里,我们使用超声(US)技术,声学镊子细胞计数(ATC),通过整合素结合的微泡(MBs)将靶向的环状亚细胞力应用于hESCs。

结果显示,ATC介导的循环力对集落边缘附近的hESCs施加30分钟诱导整个集落的即刻反应,表明细胞-细胞连接在hESCs对ATC施加的力的机械响应性中的重要性。ATC应用产生增加的收缩力,增强的钙活性,以及多能转录因子Oct4和Nanog的表达降低,导致hESCs分化的快速启动和依赖于粘着斑激酶(FAK)和细胞骨架(CSK)张力的特征性上皮-间质转化(EMT)激活。

综上所述,该研究结果揭示了hESCs对整合素靶向循环力的独特、快速的机械响应性和群落行为。

原始出处:

Tuğba Topal, Xiaowei Hong, et al., Acoustic Tweezing Cytometry Induces Rapid Initiation of Human Embryonic Stem Cell Differentiation. Sci Rep. 2018; 8: 12977.

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    2018-09-11 ailian1202
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    2018-09-11 chg122