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Journal of Nanomaterials
Volume 2010, Article ID 937684, 7 pages
Research Article

Detection of Thyroid Carcinoma Antigen with Quantum Dots and Monoclonal IgM Antibody (JT-95) System

1Department of Molecular Cell Biology, Institute of DNA Medicine, Jikei University School of Medicine, 3-25-8 Nishi-Shinbashi, Minato, Tokyo 105-8461, Japan
2International Clinical Research Center, Research Institute, International Medical Center of Japan, 1-21-1 Toyama, Shinjuku, Tokyo 162-8655, Japan
3Department of Surgery, Jikei University School of Medicine, 4-11-1 Izumi-Honcho, Komae City, Tokyo 201-8601, Japan

Received 1 October 2009; Revised 3 December 2009; Accepted 8 March 2010

Academic Editor: Chao Lin

Copyright © 2010 Kouki Fujioka et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


High-intensity fluorescent nanoparticles, quantum dots (QDs), have been applied to a wide range of biological studies and medical studies by taking advantage of their fluorescent properties. On the other hand, we have reported the specificity of JT-95 monoclonal IgM antibody, which recognizes the antigen of thyroid carcinomas. Here we show that the combination of QDs and JT-95 monoclonal antibody was applicable to Western blotting analysis, ELISA-like system, and fluorescent microscopic analysis of SW1736 thyroid carcinoma cell line. We have opened up the possibility that antibodies for higher specific recognition, even IgM, are applicable to the detection system with QDs.