Abstract
An original fluorophore engineered for two-photon excitation or a porphyrin derivative were entrapped in the silica shell of magnetic porous silica nanoparticles during the synthesis of the silica moiety without damaging the structure of the organic part. The mild conditions involved allowed obtaining microporous or mesoporous silica magnetic nanoparticles, respectively. Mannose was grafted on the surface of the nanoparticles to target MCF-7 breast cancer cells. The studies of magnetic properties of these hybrid nanoparticles show that they present a blocking temperature at 190 K. The nano-objects designed with the two-photon fluorophore were efficient for two-photon imaging of MCF-7 cancer cells, whereas the nano-objects with the photosensitizer efficiently killed cancer cells. The presence of the mannose moiety was demonstrated to improve both imaging and therapy properties.
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Acknowledgments
GDR “GDR CNRS 3049 Photomed Médicaments photoactivables—Photochimiothérapie,” Association pour la Recherche sur le Cancer” no SFI20101201906 and the non-profit organization Rétinostop is gratefully acknowledged. We gratefully thank Michel Gleizes for technical assistance, Emmanuel Schaub from PIXEL platform (multiphotonic microscopy facilities, University of Rennes 1), Corine Reibel and PAC, ICGM for magnetic measurements. L. L. thanks the UFI (GF/IR/732/07, no 25) for financial support. J.O.D, J.L., M.P., Y. G., L.R. thank CNRS, Université Montpellier 2 for financial support.
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Perrier, M., Gary-Bobo, M., Lartigue, L. et al. Mannose-functionalized porous silica-coated magnetic nanoparticles for two-photon imaging or PDT of cancer cells. J Nanopart Res 15, 1602 (2013). https://doi.org/10.1007/s11051-013-1602-9
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DOI: https://doi.org/10.1007/s11051-013-1602-9