Nano Archive

Nanocrystal-encoded fluorescent microbeads for proteomics: Antibody profiling and diagnostics of autoimmune diseases

Sukhanova, Alyona and Susha, Andrei S. and Bek, Alpan and Mayilo, Sergiy and Rogach, Andrey L. and Feldmann, Jochen and Oleinikov, Vladimir and Reveil, Brigitte and Donvito, Beatrice and Cohen, Jacques H. M. and Nabiev, Igor (2007) Nanocrystal-encoded fluorescent microbeads for proteomics: Antibody profiling and diagnostics of autoimmune diseases. NANO LETTERS, 7 (8). pp. 2322-2327.

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Official URL: http://pubs.acs.org/doi/abs/10.1021/nl070966%2B#nl...

Abstract

The first application of nanocrystal (NC)-encoded microbeads to clinical proteomics is demonstrated by multiplexed detection of circulating autoantibodies, markers of systemic sclerosis. Two-color complexes, consisting of NC-encoded, antigen-covered beads, anti-antigen antibody or clinical serum samples, and dye-tagged detecting antibodies, were observed using flow cytometry assays and on the surface of single beads. The results of flow cytometry assays correlated with the ELISA technique and provided clear discrimination between the sera samples of healthy donors and patients with autoimmune disease. Microbead fluorescence signals exhibited narrow distribution regardless of their surface antigen staining, without the need of any fluorescence compensation - a parameter determining the limit of sensitivity of flow cytometry assays. In single bead measurements, less than 30 dye-labeled antibodies interacting with the topoI-specific antibodies at the surface of a bead have been detected by the emission of dye excited through the FRET from NCs. In this format, the antibody−bead interaction reaction turns specifically the fluorescence signal from dye label off and on, additionally increasing autoantibody detection sensitivity.

Item Type:Article
Subjects:Analytical Science > Nanotechnology for sensing and actuating
Biomedical Science > Nanotechnology for human health
ID Code:6244
Deposited By:IoN
Deposited On:12 Aug 2009 16:48
Last Modified:12 Aug 2009 16:48

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