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.
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.
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.
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