Novel application of surface plasmon resonance biosensor chips for measurement of advanced glycation end products in serum of Zucker diabetic fatty rats

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Title
Novel application of surface plasmon resonance biosensor chips for measurement of advanced glycation end products in serum of Zucker diabetic fatty rats
Author(s)
Y S Kim; So Yeon Yi; J Kim; Moonil Kim; C S Kim; Bong Hyun Chung; J S Kim
Bibliographic Citation
Biosensors & Bioelectronics, vol. 25, no. 1, pp. 248-252
Publication Year
2009
Abstract
Advanced glycation end products (AGEs) have been implicated in diabetic complications. To measure AGEs, especially Nε-(carboxymethyl)lysine (CML), in sera fromZucker diabetic fatty rats (ZDF) and Zucker lean rats (ZL), we used a novel method of protein chip and surface plasmon resonance imaging (SPRI). Serum samples were obtained from male ZDF and ZL rats at 20 weeks of age. Antibodies to AGEs or CML were immobilized on a gold surface, which was modified by cysteine-tagged, protein-G constructs. The gold chip upon which the serum was spotted was optically coupled with a prism coupler. The reflected images from the gold chipwere obtained using a charge-coupled device (CCD) camera. The direct analysis of the glycated proteins and products using SPRI showed that AGEs and CML levels were elevated in ZDF serum, compared with ZL serum. The lowest detection limit of AGEs was 10 ng/ml, with a working range covering the physiological range. These results indicate that the protein chip and SPRI system is very suitable for the measurement of glycated proteins and end products in serum samples. This system offers high sensitivity without any fluorescent or other labeling of the components and saves a substantial amount of time, resources, and labor. Our results suggest that SPRI systems can be used as a tool to diagnose diabetic complications.
Keyword
Advanced glycated end products (AGEs)Diabetic complicationsNε-(carboxymethyl)lysine (CML)Surface plasmon resonance imaging (SPRI)Zucker diabetic fatty rats (ZDF)
ISSN
0956-5663
Publisher
Elsevier
DOI
http://dx.doi.org/10.1016/j.bios.2009.06.024
Type
Article
Appears in Collections:
Division of Biomaterials Research > Bionanotechnology Research Center > 1. Journal Articles
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