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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Su, Huilan Che, Xin Chai, Yaqin Song, Zhongju Jiang, Wen Ran, Xiaoqi Yuan, Ruo |
| Description | Author Affiliation: Song Z ( Key Laboratory on Luminescence and Real-Time Analysis, Ministry of Education, College of Chemistry and Chemical Engineering, Southwest University, Chongqing 400715, PR China.) |
| Abstract | A novel tracer, glucose oxidase (GOD)-functionalized hollow gold nanospheres encapsulating glucose oxidase (Au(shell)@GOD), was designed to label the ferrocenemonocarboxylic-grafted secondary antibodies (Fc@Ab(2)) for highly sensitive detection of tumor marker using carboxyl group functionalized multiwall carbon nanotubes as platform. Initially, Au(shell)@GOD was synthesized specially by reverse micelle approach, and then the labeling of antibody and the preparation of GOD-functionalized Au(shell)@GOD were performed by one-pot assembly of Fc@Ab(2) and GOD on the surface of Au(shell)@GOD. The ferrocene used to label antibodies acted as a mediator of electron transfer between GOD and electrode surface. The high-content glucose oxidase in the tracer (on the surface and in the cavity) could significantly amplify the amperometric signal for sandwich-type immunoassay. Using carcinoembryonic antigen (CEA) as model analyte, the designed tracer showed linear range from 0.02 to 5.0 ng mL(-1) with the detection limit down to 6.7 pg mL(-1). The assay results of serum samples with the proposed method were in an acceptable agreement with the reference values. The new protocol showed acceptable stability and reproducibility, high sensitivity, and good precision, which could provide a promising potential for clinical screening and diagnosis of tumor disease. |
| ISSN | 09565663 |
| Issue Number | 5 |
| Volume Number | 26 |
| e-ISSN | 18734235 |
| Journal | Biosensors and Bioelectronics |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2011-01-15 |
| Publisher Place | Great Britain (UK) |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Tumor Markers, Biological Blood Biosensing Techniques Instrumentation Carcinoembryonic Antigen Conductometry Glucose Oxidase Chemistry Immunoassay Nanospheres Immunology Enzymes, Immobilized Equipment Design Equipment Failure Analysis Gold Humans Staining And Labeling Methods Surface Properties Journal Article Research Support, Non-u.s. Gov't Discipline Biotechnology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Nanoscience and Nanotechnology Medicine Biophysics Biomedical Engineering Biotechnology Electrochemistry |
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