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相关概念视频

Intracellular Signaling Affects Focal Adhesions01:17

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Integrins act both as extracellular input receivers and as intracellular processing activators. As their name suggests, integrins are entirely integrated into the membrane structure. Their hydrophobic membrane-spanning regions interact with the phospholipid bilayer's hydrophobic region. These membrane receptors provide extracellular attachment sites for effectors like hormones and growth factors. They activate intracellular response cascades when their effectors are bound and active.
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In animal cells, the extracellular matrix allows cells within tissues to withstand external stresses and transmits signals from the outside of the cell to the inside. The extracellular matrix is extensive, and its composition varies between different types of tissues. For example, the reticular fibers and ground substance make up the ECM in loose connective tissue, while collagen and bone minerals make up the ECM of bone tissue. 
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The extracellular matrix or ECM holds cells together to form a tissue and allows the cells within the tissue to communicate. ECM comprises proteins such as fibronectin, collagen, laminin, etc. The most abundant protein in this space is collagen. Collagen fibers are interwoven with carbohydrate-containing protein molecules called proteoglycans. ECM allows cell migration and provides a structural scaffold at cell adhesion that anchors the cell when the extracellular matrix proteins interact with...
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Integrins bind ligands and transmit information from outside the cell to inside or vice-versa through an "outside-in signaling" or "inside-out signaling."
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Every normal cell or tissue is embedded in a complex local environment called stroma, consisting of different cell types, a basal membrane, and blood vessels. As normal cells mutate and develop into cancer cells, their local environment also changes to allow cancer progression. The tumor microenvironment (TME) consists of a complex cellular matrix of stromal cells and the developing tumor. The cross-talk between cancer cells and surrounding stromal cells is critical to disrupt normal tissue...
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Fibronectin is an adhesive glycoprotein present in the extracellular matrix of embryogenic and adult tissue. These molecules primarily aid in regulating cell motility and attachment. A fibronectin molecule is composed of two identical polypeptide chains attached to each other by a pair of disulfide bonds at the C-terminal.
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矩阵粘性弹性和整合素参与之间的相互作用调节癌症相关纤维细胞状态.

Yunyun Wang1, Zixuan Zhao2, Nicholas Ching Wei Ho1

  • 1Department of Biomedical Engineering, National University of Singapore, Kent Ridge, 119276, Singapore.

Advanced healthcare materials
|July 29, 2025
PubMed
概括

研究人员发现,像水凝粘性和细胞粘附等矩阵性质会影响癌症相关纤维细胞 (CAF) 状态,特别是肌纤维细胞CAF (myCAF) 和炎症性CAF (iCAF). 这一发现有助于开发更好的癌症研究临床前模型.

关键词:
在JAK/STAT信号通道上.与癌症相关的纤维细胞.粘性弹性 粘性弹性

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科学领域:

  • 癌症生物学 癌症生物学
  • 生物材料科学 生物材料科学
  • 细胞可塑性 细胞可塑性

背景情况:

  • 单细胞转录组学揭示了与癌症相关的纤维细胞 (CAFs) 是异质的,具有独特的子集,表现出独特的功能.
  • 了解CAF子集功能和开发向疗法受到临床前模型缺乏控制CAF异质性 in vitro的阻碍.
  • 以前的研究表明,CAF可塑性受到培养矩阵参数的影响.

研究的目的:

  • 研究水凝粘弹性和整合素接触如何调节封装CAF的可塑性.
  • 为了确定这些矩阵参数是否可以将CAF特异地倾向于肌纤维细胞CAF (myCAF) 或炎症CAF (iCAF) 状态.
  • 建立新的体外模型来研究CAF异质性和功能.

主要方法:

  • 使用酸盐水凝来封装患者衍生的CAF.
  • 多样化的水凝粘弹性和受控的细胞粘附 (整氨酸结合).
  • 使用单细胞转录组学分析了CAF形态和转录组特征.
  • 研究了JAK/STAT信号通路在CAF状态调制中的作用.

主要成果:

  • 患者衍生CAF采用了不同的形态和转录组形状,类似于myCAF或iCAF状态,基于水凝粘性和细胞粘附.
  • 证明矩阵特性在体外显著影响CAF可塑性.
  • 确定了JAK/STAT信号通路对于iCAF维护至关重要,也是改变CAF状态的潜在目标.

结论:

  • 矩阵粘弹性和整合素参与是CAF状态的关键调节者.
  • 开发了新的体外模型,可可控地回顾CAF异质性.
  • 这些模型为了解CAF功能提供了有价值的工具,并促进了CAF向癌症治疗的开发.