Membrane-Based Electrochemical Nanobiosensor for the Detection of Virus
| Autor: | Binh Thi Thanh Nguyen, M.L. Ng, Anthony Jin Shun Chua, Guiwan Koh, Hui Si Lim, Chee-Seng Toh |
|---|---|
| Rok vydání: | 2009 |
| Předmět: |
Viral protein
viruses Biosensing Techniques Electrochemistry medicine.disease_cause Sensitivity and Specificity Analytical Chemistry Aluminum Oxide medicine Humans Detection limit Chromatography Faradaic current Nanoporous Chemistry Osmolar Concentration Membranes Artificial Nanostructures Membrane Immunoglobulin M Electrode Biophysics Particle Binding Sites Antibody West Nile virus West Nile Fever |
| Zdroj: | Analytical Chemistry. 81:7226-7234 |
| ISSN: | 1520-6882 0003-2700 |
| DOI: | 10.1021/ac900761a |
| Popis: | A membrane-based electrochemical nanobiosensor sensitive toward whole viral particles is fabricated by forming a submicrometer thick nanoporous alumina membrane over a platinum disk electrode. Antibody probe molecules are physically adsorbed onto the walls of the membrane nanochannels. The sensing signal is based on the monitoring of the electrode's Faradaic current response toward ferrocenemethanol, which is extremely sensitive to the formation of immunocomplex within the nanoporous membrane. This nanobiosensor is demonstrated for the sensing of West Nile virus protein domain III (WNV-DIII) and the inactivated West Nile viral particle, using anti-WNV-DIII immunoglobulin M (IgM) as the biorecognition probe. The detection of the viral protein and the particle are logarithmically linear up to 53 pg mL(-1) (R(2) = 0.99) and 50 viral particles per 100 mL (R(2) = 0.93) in pH 7, with extremely low detection limits of 4 pg mL(-1) and ca. 2 viral particles per 100 mL, comparable to sensitivities of polymerase chain reaction techniques. The relative standard deviation (RSD) of whole viral particle detection in whole blood serum is 6.9%. In addition, the simple nanobiosensor construction procedure, minimal sample preparation, and short detection time of 30 min are highly attractive properties and demonstrate that the detection of a wide range of proteins and viruses can be achieved. |
| Databáze: | OpenAIRE |
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