在外体膜上的DNA聚合驱动的磁电化学适应感应用于骨髓瘤
Guang-Xian Zhong1, Huang-Feng Lin2, Fei-Huan Fu3
1Department of Orthopaedics, Fujian Provincial Institute of Orthopaedics, The First Affiliated Hospital, Fujian Medical University, Fuzhou, 350005, China; Department of Rehabilitation Medicine, School of Health, Fujian Medical University, Fuzhou, 350122, China.
Analytica chimica acta
|February 5, 2026
概括
一个新的生物传感器通过使用膜启动的酶聚合检测液体活检中的骨髓瘤 (OS) 外体. 该方法为早期癌症诊断和临床研究提供了一种敏感,具体和实用的方法.
科学领域:
- 生物医学工程 生物医学工程
- 纳米技术 纳米技术
- 分析化学 分析化学
背景情况:
- 癌症的早期诊断,特别是骨髓瘤 (OS),需要非侵入性的液体活检方法.
- 外体是癌症检测的关键生物标志物.
- 现有的同热核酸放大 (NAA) 集成的电化学适应传感器 (E-aptasensors) 在集成信号触发序列方面面临挑战.
研究的目的:
- 开发一个无模板和通用的同热NAA集成的E-aptasensor用于OS衍生的外体检测.
- 建立一个高度敏感和特定的检测方法OS外体.
- 在骨髓瘤诊断中提供液体活检的实用工具.
主要方法:
- 提出了一种基于膜启动的酶聚合 (MIEP) 的磁带驱动的E-aptasensor.
- 在外体膜上利用终端脱氧核基转移酶 (TdTase) 介导的DNA聚合.
- 采用aptamer功能化的磁性微珠 (MMBs) 来捕获外体和的过氧化酶用于信号放大.
主要成果:
- 实现了OS细胞衍生的外体的超敏感检测.
- 证明了广泛的线性检测范围 (6 × 10^7到6 × 10^10颗粒/毫升),具有较低的检测极限 (60颗粒/毫升).
- 呈现出高特异性,良好的恢复率 (在人体血中为87.9%-98.3%),并成功应用于临床血样本.
结论:
- 基于MIEP的E-aptasensor是骨髓瘤液体活检的强大工具.
- 适应传感器提供了高通用性,低样本需求和临床应用的高可行性.
- 创新的设计策略为开发用于临床研究和精密医学的先进外体生物传感器提供了一个多功能平台.
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