Electrochemical Assay of Human Islet Amyloid Polypeptide and Its AggregationReport as inadecuate




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1

Laboratory of Biosensing Technology, School of Life Science, Shanghai University, Shanghai 200444, P.R. China

2

Department of Biochemistry and National Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing 210093, P.R. China





*

Author to whom correspondence should be addressed.



Abstract Square wave voltammetry is used in this work to detect human islet amyloid polypeptide hIAPP by using the oxidized signal of the tyrosine residue in hIAPP. A detection limit of 1×10-6 M for hIAPP has been obtained. A kinetic study of the aggregation process has been carried out according to the relationship between the anodic peak current in the square wave voltammograms of hIAPP and the incubation period. The results show that the nucleation starts in the first hour of incubation and then, during the next two hours, aggregation may occur rapidly. hIAPP can therefore be monitored with a label-free electrochemical method with low detection limit and high sensitivity. This electrochemical method can be also utilized to study the kinetics of hIAPP aggregation, and it may be also employed to study the conformational changes of the polypeptide. View Full-Text

Keywords: Human islet amyloid polypeptide; bioelectrochemistry; aggregation; square wave voltammetry Human islet amyloid polypeptide; bioelectrochemistry; aggregation; square wave voltammetry





Author: Nandi Zhou 1,2, Zhenyu Chen 1, Dongmei Zhang 2 and Genxi Li 1,2,*

Source: http://mdpi.com/



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