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Biomaterials:MiR-145介导细胞形态调节的间充质干细胞分化为平滑肌细胞

2019-03-21 不详 网络

研究已经探索了使用生物化学信号传导从间充质干细胞(MSCs)获得平滑肌细胞(SMCs),但是诱导全功能SMCs表型仍然是主要的挑战。已显示细胞形态调节MSC分化成各种谱系,包括SMC。我们设计了具有微槽的底物以诱导细胞伸长,以研究在SMC分化中MSC形状调节的潜在机制。结果显示,与平坦底物上的细胞相比,在工程化底物上培养的MSC被拉长,细胞体和细胞核的纵横比增加,细胞骨架张力增加。生化研究表明,微

研究已经探索了使用生物化学信号传导从间充质干细胞(MSCs)获得平滑肌细胞(SMCs),但是诱导全功能SMCs表型仍然是主要的挑战。已显示细胞形态调节MSC分化成各种谱系,包括SMC。我们设计了具有微槽的底物以诱导细胞伸长,以研究在SMC分化中MSC形状调节的潜在机制。

结果显示,与平坦底物上的细胞相比,在工程化底物上培养的MSC被拉长,细胞体和细胞核的纵横比增加,细胞骨架张力增加。生化研究表明,微槽细胞延长的细胞表达明显更高水平的SMC标记。MicroRNA分析显示miR-145的上调和随后在这些伸长的细胞中抑制KLF4促进MSC-to-SMC分化。Rho/ROCK抑制会损害细胞骨架张力,减弱细胞和核的伸长,并破坏miR-145/KLF4对SMC分化的调节。此外,细胞牵引力测量显示miR-145对于微槽诱导的SMC分化中的功能收缩性是必需的。

总的来说,该研究结果表明,通过Rho-ROCK/miR-145/KLF4通路,伸长的细胞形状作为决定性的几何线索,将MSC分化为功能性SMC。

原始出处:

Yeh YT, Wei J, et al., MiR-145 mediates cell morphology-regulated mesenchymal stem cell differentiation to smooth muscle cells. Biomaterials. 2019 Mar 8;204:59-69. doi: 10.1016/j.biomaterials.2019.03.003.

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    2019-06-20 smallant2002
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    2019-09-21 sunylz
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