Novel trends in affinity biosensors: current challenges and perspectives

被引:53
作者
Arugula, Mary A. [1 ]
Simonian, Aleksandr [1 ]
机构
[1] Auburn Univ, Auburn, AL 36849 USA
关键词
affinity biosensor; biorecognition element; aptamers; phages; challenges; FREE ELECTROCHEMICAL APTASENSOR; HIGHLY SENSITIVE DETECTION; DIRECT IMPEDIMETRIC DETECTION; RESONANCE ENERGY-TRANSFER; LABEL-FREE; GRAPHENE OXIDE; AMPEROMETRIC IMMUNOSENSOR; SALMONELLA-TYPHIMURIUM; SIGNAL AMPLIFICATION; RAPID DETECTION;
D O I
10.1088/0957-0233/25/3/032001
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Molecular biorecognition processes facilitate physical and biochemical interactions between molecules in all crucial metabolic pathways. Perhaps the target analyte and the biorecognition element interactions have the most impactful use in biosensing applications. Traditional analytical sensing systems offer excellent biorecognition elements with the ability to detect and determine the presence of analytes. High affinity antibodies and DNA play an important role in the development of affinity biosensors based on electrochemical, optical and mass sensitive approaches. Advancements in this area routinely employ labels, label free, nanoparticles, multifunctional matrices, carbon nanotubes and other methods to meet the requirements of its own application. However, despite increasing affinity ceilings for conventional biosensors, the field draws back in meeting specifically important demands, such as long-term stability, ultrasensitivity, rapid detection, extreme selectivity, strong biological base, calibration, in vivo measurements, regeneration, satisfactory performance and ease of production. Nevertheless, recent efforts through this line have produced novel high-tech nanosensing systems such as 'aptamers' and 'phages' which exhibit high-throughput sensing. Aptamers and phages are powerful tools that excel over antibodies in sensibility, stability, multi-detection, in vivo measurements and regeneration. Phages are superior in stability, screening for affinity-based target molecules ranging from small to proteins and even cells, and easy production. In this review, we focus mainly on recent developments in affinity-based biosensors such as immunosensors, DNA sensors, emphasizing aptasensors and phage-based biosensors basing on novel electrochemical, optical and mass sensitive detection techniques. We also address enzyme inhibition-based biosensors and the current problems associated with the above sensors and their future perspectives.
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页数:22
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