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利用蛋白质 - 连接物和DNA相互作用来控制水凝机制

Namrata Ramani^1,2, Jeongmin Hwang^3,2, Alex J Anderson^3,2

¹Department of Materials Science and Engineering, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, United States.

Journal of the American Chemical Society

|May 9, 2025

概括

研究人员使用DNA和蛋白质开发了新的生物分子水凝. 这些先进的材料可用于药物输送和组织工程,

科学领域:

生物材料科学
超分子化学
生物技术

背景情况:

生物大分子是水凝的关键组成部分,通过它们的化学特性和相互作用影响材料的特性.
目前的水凝开发通常依赖于对分子组件及其组合的精确控制.

研究的目的:

引入新的生物分子水凝,利用配体功能化DNA和蛋白质-配体相互作用.
通过控制DNA结构和蛋白质-连接物结合性来证明水凝特性的独立调节.

主要方法:

用DNA骨干和蛋白质-连接体交叉链接制造水凝.
通过变化的DNA刚性 (单链与双链) 和蛋白质 - 连接体结合性来调整水凝的刚性,应力放松和剪切稀释.
评估水凝细胞相容性和细胞介导降解.

主要成果:

与单链网络相比,双链DNA网络的刚度 (高达3个数量级) 和热响应性显著提高.
发现蛋白质 - 连接体结合性和解离率决定了网络拓和应力放松动态.
开发的水凝显示出细胞相容性,并通过联体受体相互作用促进细胞迁移,从而实现细胞类型特异性降解.

结论:

水凝骨干中的局部化学相互作用和交叉链的超分子结合亲和力可以精确控制粘性弹性.
这些细胞相容的水凝具有可调节的机械特性,用于药物输送和组织工程的先进应用.

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