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Proceedings Paper

Interrogating the signaling dynamics of T cell activation with quantum dots
Author(s): Michael R. Warnement; Shannon L. Faley; John P. Wikswo; Sandra J. Rosenthal
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Paper Abstract

We report the use of antibody-conjugated quantum dots (QDs) to monitor the expression dynamics of the membrane bound cytokine receptor interleukin-2 receptor-α (IL-2Rα) throughout the course of Jurkat T cell activation. Maximal receptor expression is observed 32-48 hours after activation, followed by a sharp decrease subsequent to 48 hours consistent with IL-2R internalization. Fluorescence microscopy, ELISA, and FACS analyses were used to verify controlled activation and specificity of QD labeling. Additionally, confocal microscopy demonstrated receptor internalization subsequent to expression and QD labeling. Antibody-conjugated QDs provide a convenient means to rapidly determine cell state and interrogate end products of cell signaling pathways. Interrogation of other signaling pathways can eventually be carried out in a similar manner upon identification of relevant membrane associated receptors. Ultimately, the multiplexing capabilities of QDs will allow the examination of several signaling pathways simultaneously and aid in toxin detection and discrimination.

Paper Details

Date Published: 27 March 2006
PDF: 8 pages
Proc. SPIE 6096, Colloidal Quantum Dots for Biomedical Applications, 60960T (27 March 2006); doi: 10.1117/12.663345
Show Author Affiliations
Michael R. Warnement, Vanderbilt Univ. (United States)
Shannon L. Faley, Vanderbilt Univ. (United States)
John P. Wikswo, Vanderbilt Univ. (United States)
Sandra J. Rosenthal, Vanderbilt Univ. (United States)

Published in SPIE Proceedings Vol. 6096:
Colloidal Quantum Dots for Biomedical Applications
Marek Osinski; Kenji Yamamoto; Thomas M. Jovin M.D., Editor(s)

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