Evaluation of quantum dot immunofluorescence and a digital CMOS imaging system as an alternative to conventional organic fluorescence dyes and laser scanning for quantifying protein microarrays
Autor: | Chad Greef, D. Huw Davies, Jennipher Grudzien, Aarti Jain, Florian G. Bell, Philip L. Felgner, Abraham P. Lee, Dan Schwartz, Emmanuel Y. Dotsey, Derek Vallejo, Li Liang, Omid Taghavian |
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Jazyk: | angličtina |
Rok vydání: | 2016 |
Předmět: |
Diagnostic Imaging
0301 basic medicine Streptavidin Plasmodium falciparum Protein Array Analysis Vaccinia virus Nanotechnology 010402 general chemistry Immunofluorescence 01 natural sciences Biochemistry Antibodies Brucellosis Article 03 medical and health sciences chemistry.chemical_compound Quantum Dots Brucella melitensis Vaccinia medicine Medicine and Health Sciences Humans Malaria Falciparum Cyanine Fluorescent Antibody Technique Indirect Molecular Biology Fluorescent Dyes Microscopy Confocal medicine.diagnostic_test Chemistry business.industry Reproducibility of Results Fluorescence Immunoglobulin A 0104 chemical sciences 030104 developmental biology Immunoglobulin M Quantum dot Immunoglobulin G Biotinylation Host-Pathogen Interactions Protein microarray Optoelectronics business |
Zdroj: | Jain, Aarti; Taghavian, Omid; Vallejo, Derek; Dotsey, Emmanuel; Schwartz, Dan; Bell, Florian G; et al.(2016). Evaluation of quantum dot immunofluorescence and a digital CMOS imaging system as an alternative to conventional organic fluorescence dyes and laser scanning for quantifying protein microarrays. PROTEOMICS, 16(8), 1271-1279. doi: 10.1002/pmic.201500375. UC Irvine: Institute for Clinical and Translational Science. Retrieved from: http://www.escholarship.org/uc/item/6zq1k690 |
Popis: | Organic fluorescent dyes are widely used for the visualization of bound antibody in a variety of immunofluorescence assays. However, the detection equipment is often expensive, fragile, and hard to deploy widely. Quantum dots (Qdot) are nanocrystals made of semiconductor materials that emit light at different wavelengths according to the size of the crystal, with increased brightness and stability. Here, we have evaluated a small benchtop "personal" optical imager (ArrayCAM) developed for quantification of protein arrays probed by Qdot-based indirect immunofluorescence. The aim was to determine if the Qdot imager system provides equivalent data to the conventional organic dye-labeled antibody/laser scanner system. To do this, duplicate proteome microarrays of Vaccinia virus, Brucella melitensis and Plasmodium falciparum were probed with identical samples of immune sera, and IgG, IgA, and IgM profiles visualized using biotinylated secondary antibodies followed by a tertiary reagent of streptavidin coupled to either P3 (an organic cyanine dye typically used for microarrays) or Q800 (Qdot). The data show excellent correlation for all samples tested (R > 0.8) with no significant change of antibody reactivity profiles. We conclude that Qdot detection provides data equivalent to that obtained using conventional organic dye detection. The portable imager offers an economical, more robust, and deployable alternative to conventional laser array scanners. |
Databáze: | OpenAIRE |
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