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Probing Antigen-Antibody Interaction Using Fluorescence Coupled Capillary Electrophoresis
School of Pharmaceutical Engineering and Life Science, Changzhou University, Changzhou 213164, China
Department of Chemistry, the Chinese University of Hong Kong, Shatin, Hong Kong
These authors contributed equally to this work.
* Authors to whom correspondence should be addressed.
Received: 23 August 2013; in revised form: 4 September 2013 / Accepted: 5 September 2013 / Published: 17 September 2013
Abstract: In this report, the use of fluorescence detection coupled capillary electrophoresis (CE-FL) allowed us to fully characterize the antigen-antibody interaction. CE-FL allowed separation of unbound quantum dots (QDs) and ligand bound QDs and also revealed an ordered assembly of biomolecules on QDs. Further, we observed FRET from QDs donor to DyLight acceptor, which were covalently conjugated with human IgG and goat anti-human IgG, respectively. The immunocomplex was formed and the mutual affinity of the antigen and antibody brought QDs and DyLight close enough to allow FRET to occur. This novel CE-based technique can be easily extended to other FRET systems based on QDs and may have potential application in the detection of antibodies.
Keywords: QDs; FRET; immunocomplex; capillary electrophoresis
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Wang, J.; Qiu, L.; Wang, C.; Zhang, Y.; Li, J.; Xia, J.; Jiang, P. Probing Antigen-Antibody Interaction Using Fluorescence Coupled Capillary Electrophoresis. Int. J. Mol. Sci. 2013, 14, 19146-19154.
Wang J, Qiu L, Wang C, Zhang Y, Li J, Xia J, Jiang P. Probing Antigen-Antibody Interaction Using Fluorescence Coupled Capillary Electrophoresis. International Journal of Molecular Sciences. 2013; 14(9):19146-19154.
Wang, Jianhao; Qiu, Lin; Wang, Cheli; Zhang, Yue; Li, Jingyan; Xia, Jiang; Jiang, Pengju. 2013. "Probing Antigen-Antibody Interaction Using Fluorescence Coupled Capillary Electrophoresis." Int. J. Mol. Sci. 14, no. 9: 19146-19154.