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用于连续等离子体生物监测的分子响应的aptamer功能化水凝

Soohyun Park1, Alice Gerber1,2, Cátia Santa1

  • 1BioMed X Institute, Heidelberg 69120, Germany.

Journal of the American Chemical Society
|March 20, 2025
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概括

一个新的aptagel生物传感器可以在体内持续监测小分子, 这种水凝平台为实时生物标志物检测提供了高灵敏度,可逆性和稳定性.

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科学领域:

  • 生物医学工程
  • 材料科学
  • 分析化学

背景情况:

  • 对小分子生物标志物的持续体内监测对于实时健康评估至关重要.
  • 现有的生物传感器往往缺乏体内应用所需的可逆性,灵敏性和生物稳定性.
  • 表面等离子共振 (SPR) 技术提供无标签的实时检测功能.

研究的目的:

  • 开发一个先进的生物传感平台,用于微小分子的敏感和可逆的体内检测.
  • 设计一种分子敏感的水凝膜,称为aptagel,用于增强小分子灵敏度.
  • 评估APTAGEL平台的性能和稳定性,以进行持续监测.

主要方法:

  • 使用与8臂聚乙烯甘醇 (PEG) 工程制成的分裂胺交联基 (APTAGEL).
  • 使用表面等离子共振 (SPR) 和光学波导模式进行实时检测.
  • 集成的水晶微平衡与消散 (QCM-D) 监测以分析水凝动态.
  • 优化了体交叉链分布和分裂体互补性,以增强形状变化.

主要成果:

  • 通过APTAGEL平台,可以直接和可逆地检测出万科米辛.
  • 分析剂诱导的三元分子复合体形成导致了合体收缩和折射率变化.
  • 达到了 160-250 nM 的范素检测极限,线性检测范围高达 1 mM.
  • 与单层同类药物相比,显著提高了敏感性 (6- 9倍).
  • 在血清 (24小时) 和稀释血 (5周) 中表现出极好的稳定性.

结论:

  • 具有结构响应的aptagel平台为小分子检测提供了卓越的灵敏度和稳定性.
  • 这种aptagel生物传感器是生物标志物的持续实体监测的一个有前途的工具.
  • 开发的平台推动了实时诊断和治疗药物监测领域的发展.