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Please use this identifier to cite or link to this item:
http://ir.nhri.org.tw/handle/3990099045/4933
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| Title: | Diagnostic detection of human lung cancer-associated antigen using a gold nanoparticle-based electrochemical immunosensor |
| Authors: | Ho, J. A. A.;Chang, HC;Shih, NY;Wu, LC;Chang, YF;Chen, CC;Chou, C |
| Contributors: | National Institute of Cancer Research |
| Abstract: | The development of rapid and sensitive methods for the detection of immunogenic tumor-associated antigen is important not only for understanding their roles in cancer immunology but also for the development of clinical diagnostics. alpha-Enolase (ENO1), a p48 molecule, is widely distributed in a variety of tissues, whereas gamma-enolase (ENO2) and beta-enolase (ENO3) are found exclusively in neuron/neuroendocrine and muscle tissues, respectively. Because ENO1 has been correlated with small cell lung cancer, nonsmall cell lung cancer, and head and neck cancer, it can be used as a potential diagnostic marker for lung cancer. In this study, we developed a simple, yet novel and sensitive, electrochemical sandwich immunosensor for the detection of ENO1; it operates through physisorption of anti-ENO1 monoclonal antibody on polyethylene glycol-modified disposable screen-printed electrode as the detection platform, with polyclonal secondary anti-ENO1-tagged, gold nanoparticle (AuNP) congregates as electrochemical signal probes. The immunorecognition of the sample ENO1 by the congregated AuNP@antibody occurred on the surface of the electrodes; the electrochemical signal from the bound AuNP congregates was obtained after oxidizing them in 0.1 M HCl at 1.2 V for 120 s, followed by the reduction of AuCl(4-) in square wave voltammetry (SWV) mode. The resulting sigmoidally shaped dose-response curves possessed a linear dynamic working range from 10(-8) to 10(-12) g/mL. This AuNP congregate-based assay provides an amplification approach for detecting ENO1 at trace levels, leading to a detection limit as low as 11.9 fg (equivalent to 5 muL of a 2.38 pg/mL solution). |
| Date: | 2010-07 |
| Relation: | Analytical Chemistry. 2010 Jul;82(14):5944-5950. |
| Link to: | http://dx.doi.org/10.1021/ac1001959 |
| JIF/Ranking 2023: | http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=NHRI&SrcApp=NHRI_IR&KeyISSN=0003-2700&DestApp=IC2JCR |
| Cited Times(WOS): | https://www.webofscience.com/wos/woscc/full-record/WOS:000279727800006 |
| Cited Times(Scopus): | http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=77954632061 |
| Appears in Collections: | [施能耀] 期刊論文
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| PUB20557064.pdf | | 2034Kb | Adobe PDF | 1001 | View/Open |
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