大颗粒被控制和直角地分割成生物分子凝聚物
Fleurie M Kelley1, Anas Ani1,2, Emily G Pinlac1
1Department of Chemical and Biochemical Engineering, Rutgers, the State University of New Jersey, Piscataway, NJ 08854.
bioRxiv : the preprint server for biology
|July 29, 2024
概括
大颗粒可以进入生物分子凝聚物,如果它们有强大的结合相互作用. 这挑战了大小限制分区的想法,并为药物输送系统提供了洞察力.
科学领域:
- 生物化学 生物化学
- 细胞生物学 细胞生物学
- 生物物理学的生物物理.
背景情况:
- 生物分子凝结物通过液态-液态相分离来调节细胞过程,例如基因表达.
- 客户分子分裂成凝聚物对于它们的功能至关重要.
- 之前的研究表明,从冷凝剂中排除了大小 (>5 nm dextrans).
研究的目的:
- 调查像宏分子复合体这样的大颗粒能否分裂成凝结物.
- 确定控制粒子包含/排除的生物物理原理.
- 模型宏分子复合物使用聚合物纳米粒子与量身定制的表面化学.
主要方法:
- 作为模型系统,利用了经过修改的表面化学成分的聚合物纳米粒子.
- 经过测试的聚乙烯糖醇 (PEG) 涂层颗粒用于分区.
- 功能化的PEG化颗粒含有生物素和寡核酸.
- 研究了将其分成不同成分和盐度的冷凝物.
- 采用粗粒度分子动力学模拟和理论.
主要成果:
- 基化颗粒没有分裂成凝结物.
- 生物素功能化颗粒被分成含有斯特雷普塔维丁的凝聚物.
- 经过氧核酸装饰的颗粒显示出基于凝结物的组成,盐,长度和密度的调节分区.
- 具有明显的表面化学成分的粒子正交线地分为不可混合的冷凝物.
结论:
- 任意的大颗粒可以被可控地分成生物分子凝聚物.
- 足够强的凝聚物粒子相互作用克服了尺寸限制.
- 这些发现为细胞过程提供信息,包括大客户端分区和药物递送系统设计.
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