可调整的整合素 - 连接器合强度调节细胞自适应机制感应
Zheng Zhang1,2,3, Xiaoxi Liu1,2, Baoyong Sha4
1The Key Laboratory of Biomedical Information Engineering of Ministry of Education, School of Life Science and Technology, Xi'an Jiaotong University, Xi'an 710049, P.R. China.
Nano letters
|March 7, 2025
概括
细胞通过调节整合素-连接体相互作用来适应机械力. 这项研究揭示了DNA结合物如何影响细胞粘附和机械感知,影响生物材料设计.
科学领域:
- 细胞机械生物学 细胞机械生物学
- 生物材料科学是生物材料的科学.
- 分子细胞生物学分子细胞生物学
背景情况:
- 细胞通过整体因子与细胞外基质 (ECM) 相互作用,施加引力.
- 整合素-连接体结合对于细胞粘附和机械感知至关重要.
- 粘附分子的张力耐受性影响细胞行为.
研究的目的:
- 为了研究整合素-连接体合强度在细胞自适应机械感知中的作用.
- 探索不同的DNA结合物 (dsDNA与slDNA) 如何在紧张状态下影响细胞粘附.
- 了解合强度对细胞迁移 (durotaxis) 的影响.
主要方法:
- 对Arg-Gly-Asp (RGD) 与dSDNA和slDNA结合物的共价结合.
- 在PEG基板上的DNA-RGD结的固定.
- 测量细胞对不同紧张的反应,包括actin聚合和cofilin酸化.
主要成果:
- 干环DNA (slDNA) 连接器在高张力下保持结合,与双链DNA (dsDNA) 连接器不同.
- 细胞通过调节行为因子动态和cofilin酸化来适应粘附,以保持整合素-联结体合.
- 整合素-连接体合强度决定了细胞是否表现出正或负的durotaxis.
结论:
- 整合素-连接体合强度是细胞自适应机械感知的一个关键媒介.
- 可调节的DNA带为设计具有受控粘合性质的生物材料提供了洞察力.
- 了解这些机制对于基于细胞的应用和生物材料开发至关重要.
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