食品科学 ›› 2026, Vol. 47 ›› Issue (6): 23-40.doi: 10.7506/spkx1002-6630-20251013-059

• 功能性脂质生物制造专栏 • 上一篇    

基于多功能适配体磁性COF-CuO/Au纳米酶的双信号比色/荧光法检测海产品中副溶血性弧菌

孙迪,杨学文,王辉,林鸿勇,何晓霞,霍震霆,刘宇,余中节,姜维   

  1. (1.浙江海洋大学 国家海洋设施养殖工程技术研究中心,浙江 舟山 316022;2.广东海洋大学食品科技学院,广东省水产品加工与安全重点实验室,广东 湛江 524088;3.浙江海洋大学食品与药学学院,浙江省海产品健康危害因素关键技术研究重点实验室(共建),浙江 舟山 316022;4.青岛海关技术中心,山东 青岛 266000)
  • 发布日期:2026-04-14
  • 基金资助:
    国家海洋设施养殖工程技术研究中心开放课题项目(NERC202410); 国家自然科学基金青年科学基金项目(32402261;32402034); 广东省水产品加工与安全重点实验室开放基金项目(GDPKLAPPS2409);大学生科技成果推广项目(2025XMPY020)

Dual-Signal Colorimetric/Fluorescent Detection of Vibrio parahaemolyticus in Seafood Using a Multifunctional Aptamer-Conjugated Magnetic Covalent Organic Framework-CuO/Au Nanozyme

SUN Di, YANG Xuewen, WANG Hui, LIN Hongyong, HE Xiaoxia, HUO Zhenting, LIU Yu, YU Zhongjie, JIANG Wei   

  1. (1. National Engineering Research Center for Marine Aquaculture, Zhejiang Ocean University, Zhoushan 316022, China; 2. Guangdong Provincial Key Laboratory of Aquatic Product Processing and Safety, College of Food Science and Technology, Guangdong Ocean University, Zhanjiang 524088, China; 3. Key Laboratory of Key Technical Factors in Zhejiang Seafood Health Hazards, Food and Pharmacy College, Zhejiang Ocean University, Zhoushan 316022, China; 4. Technology Center of Qingdao Customs, Qingdao 266000, China)
  • Published:2026-04-14

摘要: 本研究构建了一种多功能适配体偶联磁性共价有机框架-CuO/Au纳米酶(magnetic covalent organic framework (COF)-CuO/Au nanozyme,MCOF-CuO/Au@apt),作为“三合一”平台,用于副溶血性弧菌的比色/荧光双信号检测。该纳米酶通过偶联适配体策略,整合了磁性分离、类过氧化物酶催化活性与特异性靶标识别功能。当与副溶血性弧菌结合后,纳米酶对四-(4-氨基苯)乙烯的催化氧化作用被选择性抑制,从而产生显著的比色与荧光信号,大幅提升了检测的准确性与可靠性。所建立的方法表现出高灵敏度,比色法检测限为21 CFU/mL,荧光法检测限为7 CFU/mL。该方法在实际海产品样品(包括南美白对虾、厚壳贻贝和太平洋牡蛎)中的应用验证结果表明,其具有较高的回收率(101.11%~107.30%)和良好的重复性。此外,该检测系统在不同条件下均展现出优异的特异性与准确性,证实了其稳定性与实际应用潜力。综上所述,该创新性平台为海产品中副溶血性弧菌的快速、通用和灵敏检测提供了一种有前景的解决方案,在食品安全诊断与现场监测领域展现出重要的应用价值。

关键词: 副溶血性弧菌;双信号检测;适配体纳米酶;磁性共价有机框架;海产品安全

Abstract: In this study, a multifunctional aptamer-conjugated magnetic covalent organic framework (COF)-CuO/Au nanozyme (MCOF-CuO/Au@apt) was developed as a “three-in-one” platform for dual-signal colorimetric and fluorescent detection of Vibrio parahaemolyticus. The nanozyme integrated magnetic separation, peroxidase-like catalytic activity, and specific target recognition through an aptamer-based strategy. Upon binding to V. parahaemolyticus, the catalytic oxidation of tetra-aminophenylethylene (TPE-4A) by the nanozyme was selectively inhibited, resulting in distinct colorimetric and fluorescent signals that significantly enhanced the detection accuracy and reliability. The proposed method exhibited high sensitivity, with limits of detection (LOD) of 21 and 7 CFU/mL for the colorimetric and fluorescent assays, respectively. The performance of this method was validated using real seafood samples, including Penaeus vannamei, Mytilus coruscus, and Crassostrea gigas, which showed high recovery rates (101.11%–107.30%) and excellent reproducibility. The system also demonstrated strong specificity and accuracy under various conditions, confirming its robustness and practical applicability. Collectively, this innovative platform presents a promising solution for the rapid, versatile, and sensitive detection of V. parahaemolyticus in seafood, with considerable potential to advance food safety diagnosis and on-site monitoring.

Key words: Vibrio parahaemolyticus; dual-signal detection; aptamer-based nanozyme; magnetic covalent organic framework; seafood safety

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