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高 afinity 和选择性的 DNA aptamers 在眼滴中检测托布拉米辛

Xiaohan Zhang¹, Emily Hoi Pui Chao², Qiushi Liu¹

¹Department of Chemistry, Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, ON, N2L 3G1, Canada.

Biosensors & bioelectronics

|March 8, 2026

概括

我们开发了一种高亲和度DNA吸收体,TOB-2,用于抗生素托布拉米辛. 这种阿普坦能够使用光生物传感器在眼药中灵敏地检测托布拉米辛.

科学领域:

生物化学生物化学
分子生物学分子生物学
分析化学分析化学

背景情况:

托布拉米辛是一种关键的氨基糖类抗生素.
它具有狭窄的治疗窗口,需要精确的监测.
现有的检测方法可能缺乏灵敏度或特异性.

研究的目的:

为了选择对托布拉米辛的高亲和度DNA吸收体.
为了描述所选的体酶的结构和结合特性.
开发一个敏感的生物传感器来检测托布拉米辛.

主要方法:

通过指数式丰富 (SELEX) 策略的联体的系统演化.
异热定位热量计 (ITC) 用于结合亲和度.
用于结构分析的NMR光谱学和循环二元化.
开发一个无标签的光生物传感器.

主要成果:

鉴定出一种性阿巴,TOB-2,对托布拉米辛具有很高的亲和力 (420 nM Kd).
TOB-2 证明了对卡纳米辛的选择性超过1000倍.
结构分析显示了一个茎环架构.
开发的生物传感器实现了对托布拉米辛的29nM检测极限.

结论:

与之前报告的体相比,TOB-2具有更高的结合性能.
基于aptamer的光生物传感器可以准确量化tobramycin.
这种aptamer具有与实时监控的先进传感平台集成的潜力.

关键词:

氨基甘油酸氨基基化物抗生素抗生素是一种抗生素.生物传感器是一种生物传感器.光是一种光效应.这就是SELEXEX.

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