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Forced Transdifferentiation01:28

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Transdifferentiation, also known as lineage reprogramming, was first discovered by Selman and Kafatos in 1974 in silkmoths. They observed that the moths’ cuticle-producing cells transformed into salt-producing cells. Many such cases of natural transdifferentiation occur in organisms. In humans, pancreatic alpha cells can become beta cells. In newts, the loss of the eye’s lens causes the pigmented epithelial cells to transdifferentiate into the lens cells.
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Gradient Strain Chip for Stimulating Cellular Behaviors in Cell-laden Hydrogel
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机械细胞重编程在组织模拟水凝上用于癌细胞转化

Xueqing Ren1, Yachao Wang2, Mengcheng Lei1

  • 1Key Laboratory of Molecular Biophysics of MOE and Hubei Bioinformatics & Molecular Imaging Key Laboratory, Department of Biomedical Engineering, College of Life Science and Technology-Key Laboratory for Biomedical Photonics of MOE at Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, P. R. China.

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组织矩阵机制影响细胞行为和健康. 这项研究表明,使用模仿组织的水凝进行机械重编程可以重编程细胞,促进干性,并可能治疗癌症等疾病.

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科学领域:

  • 生物材料科学
  • 细胞生物学
  • 复原医学

背景情况:

  • 干扰组织基因机制与癌症和神经退行等疾病有关.
  • 衰老的组织矩阵失去完整性, 改变生物物理性质.
  • 在调节细胞健康和功能方面,矩阵机械性质的作用在很大程度上是未知的.

研究的目的:

  • 研究细胞在模仿组织的机械微环境中培养时是否表现出重新编程的行为.
  • 探索机械重编程在再生医学和癌症治疗中的潜力.

主要方法:

  • 使用粘性弹性和非线性弹性组成的模仿组织的水凝.
  • 在水凝上培养纤维细胞,观察聚合物形成和基因表达.
  • 对非小肺癌细胞进行了机械重编程.

主要成果:

  • 纤维细胞形成了带有高干性基因和增强分化潜力的介质聚合物.
  • 通过细胞收缩的原网络重组驱动了中酶体积的形成.
  • 机械重编程诱导了肺癌细胞的脂肪转基因分化,逆转了上皮细胞转变为介质细胞的标志物,并抑制了瘤基因.

结论:

  • 细胞行为可以通过机械微环境重新编程.
  • 机械重编程模拟组织的水凝显示出再生医学和癌症治疗的前景.
  • 这种方法通过调节细胞机械性质为疾病治疗提供了一种新的策略.