NIR Imaging of the Integrin-Rich Head and Neck Squamous Cell Carcinoma Using Ternary Copper Indium Selenide/Zinc Sulfide-Based Quantum Dots.
Fiche publication
Date publication
décembre 2020
Journal
Cancers
Auteurs
Membres identifiés du Cancéropôle Est :
Dr BEZDETNAYA-BOLOTINE Lina, Pr MARCHAL Frédéric
Tous les auteurs :
Yakavets I, Francois A, Guiot M, Lequeux N, Fragola A, Pons T, Bezdetnaya L, Marchal F
Lien Pubmed
Résumé
The efficient intraoperative identification of cancers requires the development of the bright, minimally-toxic, tumor-specific near-infrared (NIR) probes as contrast agents. Luminescent semiconductor quantum dots (QDs) offer several unique advantages for in vivo cellular imaging by providing bright and photostable fluorescent probes. Here, we present the synthesis of ZnCuInSe/ZnS core/shell QDs emitting in NIR (~750 nm) conjugated to NAVPNLRGDLQVLAQKVART (A20FMDV2) peptide for targeting integrin-rich head and neck squamous cell carcinoma (HNSCC). Integrin is usually not detectable in nonpathological tissues, but is highly upregulated in HNSCC. QD-A20 showed integrin-specific binding in two-dimension (2D) monolayer and three-dimension (3D) spheroid in vitro HNSCC models. QD-A20 exhibit limited penetration (ca. 50 µm) in stroma-rich 3D spheroids. Finally, we demonstrated the potential of these QDs by time-gated fluorescence imaging of stroma-rich 3D spheroids placed onto mm-thick tissue slices to mimic imaging conditions in tissues. Overall, QD-A20 could be considered as highly promising nanoprobes for NIR bioimaging and imaging-guided surgery.
Mots clés
bioconjugates, indium-based quantum dots, integrins, multicellular tumor spheroids, near-infrared imaging, time-gated fluorescence microscopy
Référence
Cancers (Basel). 2020 Dec 11;12(12):