| Detection of C-reactive protein based on immunoassay using antibody-conjugated magnetic nanoparticles. | |
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MedLine Citation:
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PMID: 17902698 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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We report a detection method for C-reactive protein (CRP) based on competitive immunoassay using magnetic nanoparticles under magnetic fields. Functional magnetic nanoparticles were prepared and conjugated with anti-CRP for immunoassay. Magnetic nanoparticles labeled with anti-CRP were flowed through a separation channel to form depositions for selective capture of CRP under magnetic fields. Free CRP and a fixed number of CRP-labeled particles were used to compete for a limited number of anti-CRP binding sites on the magnetic nanoparticles. The deposited percentages of CRP-labeled particles at various concentrations of free CRP were determined and used as a reference plot. The determination of CRP in the unknown sample was deduced from the reference plot using the deposited percentages. The running time was less than 10 min. The CRP concentration of serum sample was linearly over the range of 1.2-310 microg/mL for deposited percentages of CRP-labeled particles. The detection limit of this method was 0.12 microg/mL which was approximately 8-fold lower than the typical clinical cutoff concentration (1 microug/mL). This method can provide a fast, simple, and sensitive way for protein detection based on competitive immunoassay using magnetic nanoparticles under magnetic fields. |
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Authors:
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H Y Tsai; C F Hsu; I W Chiu; C Bor Fuh |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2007-09-29 |
Journal Detail:
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Title: Analytical chemistry Volume: 79 ISSN: 0003-2700 ISO Abbreviation: Anal. Chem. Publication Date: 2007 Nov |
Date Detail:
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Created Date: 2007-10-31 Completed Date: 2007-12-21 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0370536 Medline TA: Anal Chem Country: United States |
Other Details:
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Languages: eng Pagination: 8416-9 Citation Subset: IM |
Affiliation:
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Department of Applied Chemistry, Chung Shan Medical University, Taichung, Taiwan. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Antibodies
/
analysis,
immunology Antigen-Antibody Complex C-Reactive Protein / analysis*, immunology Humans Immunoassay* Magnetics* Nanoparticles / chemistry* Particle Size Reference Values Sensitivity and Specificity |
| Chemical | |
Reg. No./Substance:
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0/Antibodies; 0/Antigen-Antibody Complex; 9007-41-4/C-Reactive Protein |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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