Title
Synthesis, Characterization, and Evaluation of Near-IR Boron Dipyrromethene Bioconjugates for Labeling of Adenocarcinomas by Selectively Targeting the Epidermal Growth Factor Receptor
Document Type
Article
Publication Date
4-11-2019
Abstract
A series of five boron dipyrromethene (BODIPY) bioconjugates containing an epidermal growth factor receptor (EGFR)-targeted pegylated LARLLT peptide and/or a glucose or biotin ethylene diamine group were synthesized, and the binding capability of the new conjugates to the extracellular domain of EGFR was investigated using molecular modeling, surface plasmon resonance, fluorescence microscopy, competitive binding assays, and animal studies. The BODIPY conjugates with a LARLLT peptide were found to bind specifically to EGFR, whereas those lacking the peptide bound weakly and nonspecifically. All BODIPY conjugates showed low cytotoxicity (IC > 94 μM) in HT-29 cells, both in the dark and upon light activation (1.5 J/cm). Studies of nude mice bearing subcutaneous human HT-29 xenografts revealed that only BODIPY conjugates bearing the LARLLT peptide showed tumor localization 24 h after intravenous administration. The results of our studies demonstrate that BODIPY bioconjugates bearing the EGFR-targeting peptide 3PEG-LARLLT show promise as near-IR fluorescent imaging agents for colon cancers overexpressing EGFR.
Publication Source (Journal or Book title)
Journal of medicinal chemistry
First Page
3323
Last Page
3335
Recommended Citation
Kaufman, N. E., Meng, Q., Griffin, K. E., Singh, S. S., Dahal, A., Zhou, Z., Fronczek, F. R., & Mathis, J. M. (2019). Synthesis, Characterization, and Evaluation of Near-IR Boron Dipyrromethene Bioconjugates for Labeling of Adenocarcinomas by Selectively Targeting the Epidermal Growth Factor Receptor. Journal of medicinal chemistry, 62 (7), 3323-3335. https://doi.org/10.1021/acs.jmedchem.8b01746