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利用SPR生物传感器检测缺血修饰白蛋白
引用本文:李广,陈龙聪,李贤,杨萌,陈萌梦,熊兴良.利用SPR生物传感器检测缺血修饰白蛋白[J].传感器与微系统,2014(1):144-146,156.
作者姓名:李广  陈龙聪  李贤  杨萌  陈萌梦  熊兴良
作者单位:[1]重庆医科大学生物医学工程实验室,重庆400016 [2]重庆大学生物力学与组织工程教育部重点实验室,重庆400044
基金项目:国家自然科学基金资助项目(30500125);重庆市自然科学基金资助项目(2008BB5395)
摘    要:缺血修饰白蛋白(IMA)的检测对心肌缺血的早期诊断和治疗具有重要意义。利用纳米金颗粒和混合巯基自组装于金膜表面上,研制了一种快速检测IMA的表面等离子体共振(SPR)生物传感器。同时比较了直接法和抑制法的检测下限。结果表明:直接检测法可以检测到393ng/L的IMA,而抑制检测法检测限小于5.0 ng/L。与现有的IMA检测方法相比,SPR生物传感器具有特异性好、检测下限低以及检测耗时短等优点。

关 键 词:表面等离子体共振  混合巯基自组装  缺血修饰白蛋白  纳米金

Detection of ischemia modified albumin using SPR biosensor
LI Guang,CHEN Long-cong,LI Xian,YANG Meng,CHEN Meng-meng,XIONG Xing-liang.Detection of ischemia modified albumin using SPR biosensor[J].Transducer and Microsystem Technology,2014(1):144-146,156.
Authors:LI Guang  CHEN Long-cong  LI Xian  YANG Meng  CHEN Meng-meng  XIONG Xing-liang
Affiliation:1. Laboratory of Biomedical Engineering, Chongqing Medical University, Chongqing 400016, China; 2. Key Laboratory of Biomechanical & Tissue Engineering, Ministry of Education, Chongqing University, Chongqing 400044, China)
Abstract:The detection of Ischemia modified albumin (IMA) is significant for early diagnosis and intervention of myocardial iscbemia patient. Present a sensitive IMA detection protocol based on surface plasmon resonance (SPR) biosensor combined nan0gold and mixed self-assembled Au film. Different assay methods are investigated and compared.Result shows that the limit of detection (LOD) is 393 ng/L for direct detection, while, as to inhibitive assay, the LOD is less than 5. 0 ng/L. Compared with other methods, SPR biosensor exhibits good repetition,in this way, the sensitivity and discrimination of the proposed biosensor are greatly improved.
Keywords:surface plasmon resonance (SPR)  mixed self-assembly monolayers (SAM)  ischemia modified albumin (IMA)  gold nanoparticles
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