通过多重光监测对碳纳米管的冠状交换动态
Rebecca L Pinals1, Darwin Yang1, Alison Lui1
1Department of Chemical and Biomolecular Engineering , University of California at Berkeley , Berkeley , California 94720 , United States.
Journal of the American Chemical Society
|December 31, 2019
概括
我们开发了一种新方法, 实时跟踪蛋白质和DNA在纳米颗粒上的交换. 这揭示了像白蛋白和纤维素这样的血液蛋白质如何影响纳米粒子传感器,
科学领域:
- 纳米技术
- 生物材料科学
- 表面化学
背景情况:
- 在基因传递和光学探针中使用DNA纳米粒子复合体.
- 它们的体内行为是不可预测的,测试通常仅限于血清环境.
研究的目的:
- 在纳米粒子上开发生物分子交换动态的时间解析测量.
- 研究蛋白质冠状形成及其对基于单壁碳纳米管 (SWCNT) 的多巴胺传感器的影响.
主要方法:
- 使用SWCNT作为光灭器来捕获标记生物分子的实时结合.
- 应用冠状交换试验来研究蛋白质吸附和DNA移位动态.
- 研究了SWCNTs与单链DNA (ssDNA) 的白蛋白和纤维素的交换.
主要成果:
- 与 (GT) 6 ssDNA相比, (GT) 15 ssDNA对SWCNTs的亲和力更高.
- 纤维素对ssDNA-SWCNTs的吸附比对白蛋白的吸附更强.
- 蛋白和纤维素导致多巴胺传感器反应显著减弱,与DNA脱吸有关.
- 与白蛋白相比,纤维素对SWCNT结合的发生率更高,脱离率更低.
结论:
- 开发了一种评估纳米粒子实时冠状交换的通用方法.
- 证明纤维素对SWCNTs的亲和力比白蛋白更高.
- 在血中对纳米粒子技术进行激励性测试,以进行更相关的生物相容性评估.
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