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Zhou N, Chen Z, Zhang D, Li G. Electrochemical Assay of Human Islet Amyloid Polypeptide and Its Aggregation. SENSORS 2008; 8:5987-5995. [PMID: 27873853 PMCID: PMC3705543 DOI: 10.3390/s8095987] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/14/2008] [Revised: 09/11/2008] [Accepted: 09/22/2008] [Indexed: 12/29/2022]
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.
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Affiliation(s)
- Nandi Zhou
- Laboratory of Biosensing Technology, School of Life Science, Shanghai University, Shanghai 200444, P.R. China
- Department of Biochemistry and National Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing 210093, P.R. China
| | - Zhenyu Chen
- Laboratory of Biosensing Technology, School of Life Science, Shanghai University, Shanghai 200444, P.R. China
| | - Dongmei Zhang
- Department of Biochemistry and National Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing 210093, P.R. China
| | - Genxi Li
- Laboratory of Biosensing Technology, School of Life Science, Shanghai University, Shanghai 200444, P.R. China.
- Department of Biochemistry and National Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing 210093, P.R. China.
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Xiao H, Liu L, Meng F, Huang J, Li G. Electrochemical Approach To Detect Apoptosis. Anal Chem 2008; 80:5272-5. [DOI: 10.1021/ac8005268] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Han Xiao
- Department of Biochemistry and National Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing 210093, P. R. China, and Laboratory of Biosensing Technology, School of Life Science, Shanghai University, Shanghai 200444, P. R. China
| | - Lei Liu
- Department of Biochemistry and National Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing 210093, P. R. China, and Laboratory of Biosensing Technology, School of Life Science, Shanghai University, Shanghai 200444, P. R. China
| | - Fanben Meng
- Department of Biochemistry and National Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing 210093, P. R. China, and Laboratory of Biosensing Technology, School of Life Science, Shanghai University, Shanghai 200444, P. R. China
| | - Junyi Huang
- Department of Biochemistry and National Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing 210093, P. R. China, and Laboratory of Biosensing Technology, School of Life Science, Shanghai University, Shanghai 200444, P. R. China
| | - Genxi Li
- Department of Biochemistry and National Key Laboratory of Pharmaceutical Biotechnology, Nanjing University, Nanjing 210093, P. R. China, and Laboratory of Biosensing Technology, School of Life Science, Shanghai University, Shanghai 200444, P. R. China
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