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The cells of the blastocyst inner cell mass only remain pluripotent for a short time. This state of pluripotency and self-renewal can be maintained in embryonic stem (ES) cell culture by adding specific chemicals or growth factors to ensure the cells can continue dividing and later differentiate into different cell types. In some cases, the cells are grown on a feeder layer of differentiated cells, which provides the growth factors and extracellular matrix components necessary for stem cell...
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The stem cell niche is the dynamic microenvironment where stem cells reside. Inside these niches, the cells may remain undifferentiated, undergo high self-renewal, or become lineage-specific progenitors. Stem cells coexist with other niche cells, such as stromal cells. They also interact closely with the ECM. Cell-cell and cell-matrix communication occur via adhesion molecules or soluble factors that signal the stem cells and determine their fate. Stromal cells also provide survival signals to...
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The hematopoietic stem cells or HSCs are multipotent, meaning they can differentiate and give rise to all blood and immune cells. HSCs are maintained in the quiescent stage until an external stimulus initiates their differentiation. The multipotent HSCs exist as two heterogeneous populations, long-term repopulating cells (LTRC) and short-term repopulating cells (STRC). The two HSC populations have different surface markers or receptors and are classified based on quiescence and long-term...
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相关实验视频

Updated: Jun 21, 2025

Author Spotlight: Improved Nucleofection for High-Efficiency Gene Delivery in Murine Subventricular Zone-Derived Neural Stem Cell Cultures
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基质应激放松调节神经干细胞的命运承诺.

Eric Qiao1, Camille A Fulmore2, David V Schaffer1,2,3

  • 1Department of Chemical and Biomolecular Engineering, University of California, Berkeley, CA 94720.

Proceedings of the National Academy of Sciences of the United States of America
|July 5, 2024
PubMed
概括

成人神经干细胞 (NSC) 分化为神经元或神经. 我们发现,它们环境的粘弹性特性会影响NSC的命运,通过改变细胞骨动力学来促进质分化.

关键词:
机械传导 机械传导神经干细胞的神经干细胞神经发生神经发生.压力放松放松 压力放松粘性弹性 粘性弹性

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科学领域:

  • 神经科学是一个神经科学.
  • 生物材料科学 生物材料科学
  • 干细胞生物学 干细胞生物学

背景情况:

  • 海马体中的成人神经干细胞 (NSC) 对于学习和记忆至关重要.
  • 了解NSC命运承诺对于解决神经退行性疾病至关重要.
  • 以前的研究将NSC分化与细胞外矩阵刚性联系起来,但体内组织具有粘弹性特性.

研究的目的:

  • 为了研究基质粘弹性对成年神经干细胞命运承诺的影响.
  • 开发一种新的细胞培养平台,用于调整矩阵粘弹性特性.
  • 阐明NSC对粘弹性线索的反应背后的分子机制.

主要方法:

  • 开发了一种基于聚烯胺的细胞培养平台,使用DNA寡核酸交叉链接可调节的粘弹性.
  • 改变了不匹配的基数对的数量,以控制压力放松特性.
  • 分析了NSC分化,细胞骨动力学 (动氨酸流) 和机械敏感蛋白激活 (RhoA).
  • 使用肌酸二酶和焦粘附激酶的抑制剂来探测分子通路.

主要成果:

  • 基质应力放松的增加促进了NSC的天体细胞分化.
  • 粘弹性基板降低了细胞内行为因流速.
  • 在压力放松基质上刺激了RhoA的循环激活.
  • 抑制myosin II或焦粘附激酶部分逆转了谱系变化.

结论:

  • 该研究引入了一种用于控制细胞培养中的矩阵粘性弹性的新系统.
  • NSC的命运承诺受到微环境中粘弹性线索的整合的影响.
  • 粘性弹性通过调节细胞骨动力学和涉及RhoA的机械转导通路来影响NSC分化.