Nanostructured biosensor using bioluminescence quenching technique for glucose detection

Journal of Nanobiotechnology

Research

Longyan Chen¹  Longyi Chen¹  Jin Zhang¹  C. W. James Melling²  Michelle Dotzert² 

[1] Department of Chemical and Biochemical Engineering, University of Western Ontario, 1151 Richmond St., N6A 5B9, London, ON, Canada;School of Kinesiology, Faculty of Health Sciences, University of Western Ontario, N6A 5B9, London, ON, Canada;

关键词: Bioluminescence;    Biosensor;    Nanoparticles;    Glucose;   

DOI  :  10.1186/s12951-017-0294-1

 received in 2017-03-31, accepted in 2017-08-10,  发布年份 2017

来源: Springer

【 摘 要 】

BackgroundMost methods for monitoring glucose level require an external energy source which may limit their application, particularly in vivo test. Bioluminescence technique offers an alternative way to provide emission light without external energy source by using bioluminescent proteins found from firefly or marine vertebrates and invertebrates. For quick and non-invasive detection of glucose, we herein developed a nanostructured biosensor by applying the bioluminescence technique.ResultsLuciferase bioluminescence protein (Rluc) is conjugated with β-cyclodextrin (β-CD). The bioluminescence intensity of Rluc can be quenched by 8 ± 3 nm gold nanoparticles (Au NPs) when Au NPs covalently bind to β-CD. In the presence of glucose, Au NPs are replaced and leave far from Rluc through a competitive reaction, which results in the restored bioluminescence intensity of Rluc. A linear relationship is observed between the restored bioluminescence intensity and the logarithmic glucose concentration in the range of 1–100 µM. In addition, the selectivity of this designed sensor has been evaluated. The performance of the senor for determination of the concentration of glucose in the blood of diabetic rats is studied for comparison with that of the concentration of glucose in aqueous.ConclusionsThis study demonstrates the design of a bioluminescence sensor for quickly detecting the concentration of glucose sensitively.

【 授权许可】

CC BY   
© The Author(s) 2017