Abstract
Glioblastomas, aggressive and highly vascularized brain tumors, overexpress αvβ3 integrins, which are widely exploited for cancer diagnostics and therapy. Proteins and peptides containing the RGD sequence bind αvβ3 integrins. Here, we describe detailed protocols for preparation and testing of fluorescent nanodiamonds coated with a biocompatible N-(2-hydroxypropyl)methacrylamide copolymer shell. When the surface of these particles was modified with a cyclic RGD peptide, they selectively targeted integrin αvβ3 receptors on U-87 MG glioblastoma cells with high internalization efficacy. The modified particles enabled background-free near-infrared imaging of cells, showed excellent colloidal stability in culture media, and exhibited negligible cytotoxicity.
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Acknowledgments
This work was supported by the Czech Science Foundation project Nr. 16-16336S (to J.N. and P.C.) and Nr. 16-03156S (to M.H.). Irradiations were performed at the CANAM infrastructure of the NPI CAS Rez supported through MŠMT project No. LM2011019. Imaging was performed on confocal microscope supported by Project NPU I, LO 1302 from the Ministry of Education, Youth and Sports of the Czech Republic.
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Neburkova, J. et al. (2017). Targeting Glioma Cancer Cells with Fluorescent Nanodiamonds via Integrin Receptors. In: Patsenker, E. (eds) Integrin Targeting Systems for Tumor Diagnosis and Therapy. Methods in Pharmacology and Toxicology. Humana Press, New York, NY. https://doi.org/10.1007/7653_2017_68
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DOI: https://doi.org/10.1007/7653_2017_68
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