Volume 53, Issue 25 pp. 6459-6463
Communication

Catching Bubbles: Targeting Ultrasound Microbubbles Using Bioorthogonal Inverse-Electron-Demand Diels–Alder Reactions

Aimen Zlitni

Aimen Zlitni

Department of Chemistry and Chemical Biology, McMaster University, 1280 Main St W., Hamilton, Ont., L8S 4M1 (Canada)

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Nancy Janzen

Nancy Janzen

Department of Chemistry and Chemical Biology, McMaster University, 1280 Main St W., Hamilton, Ont., L8S 4M1 (Canada)

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Dr. F. Stuart Foster

Dr. F. Stuart Foster

Department of Medical Biophysics, University of Toronto, Sunnybrook Hospital, Toronto, Ont. M4N S658 (Canada)

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Dr. John F. Valliant

Corresponding Author

Dr. John F. Valliant

Department of Chemistry and Chemical Biology, McMaster University, 1280 Main St W., Hamilton, Ont., L8S 4M1 (Canada)

Department of Chemistry and Chemical Biology, McMaster University, 1280 Main St W., Hamilton, Ont., L8S 4M1 (Canada)Search for more papers by this author
First published: 14 May 2014
Citations: 29

Financial support for this research was provided by the Natural Sciences and Engineering Research Council (NSERC) of Canada, The Ontario Ministry of Research and Innovation, the Ontario Research Fund (grant no. RE03-051), and the Canadian Cancer Society (grant no. 2011-700896). The authors also acknowledge Frederick R. Roberts and VisualSonics for their technical support.

Graphical Abstract

Catching bubbles: Tetrazine-functionalized microbubbles were prepared for use as ultrasound contrast agents, and shown to selectively localize on cells labeled with a TCO-derivatized antibody against VEGFR2. This capture approach based on labeling and bioorthogonal chemistry was validated in a flow-chamber assay and in vivo through ultrasound imaging of VEGFR2-positive and VEGFR2-negative murine tumor models. TCO=trans-cyclooctene.

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