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- W2808032841 abstract "Ewing Sarcoma is a rare pediatric cancer, caused in the majority of the cases by the expression of the fusion oncogene EWS-Fli1. Current treatments have not much evolved over the past decades. We are investigating a new therapy based on siRNA specifically targeting the oncogene and inhibiting the tumor growth. During my PhD thesis, I have tested different types of synthetic nanodiamonds (ND) used to vectorize siRNA electrostatically bound at their surface: ND produced by detonation (DND) or by High Pressure-High Temperature synthesis (NDHPTH). Their surfaces have been cationized by various processes: (i) plasma or (ii) thermal hydrogenation, (ii) chemical treatment, or (iv) covalent grafting of a copolymer (COP-NDHPHT).My PhD work included two main axis: (i) in vitro study of ND:siRNA complexes (NDs physico-chemical characterization and oncogene inhibition efficacy by the complexes); (ii) tissue distribution of COP-NDHPHT, injected into mice, using fluorescent NDHPHT containing nitrogen-vacancy defects. To detect them individually in sections of mouse organs carrying a subcutaneous xenograft tumor, we developed an epifluorescence imaging system with large numerical aperture and resolved in time to reject tissue autofluorescence (of a shorter lifetime than NDs). We quantified the number, the aggregation state and the cell localization (thanks to simultaneous histopathological imaging) of these vectors 24 hours after injection. NDs have been clearly detected in different organs, including the tumor, paving the way for tumor progression control with siRNA." @default.
- W2808032841 created "2018-06-21" @default.
- W2808032841 creator A5006634025 @default.
- W2808032841 date "2018-05-25" @default.
- W2808032841 modified "2023-09-27" @default.
- W2808032841 title "Fluorescent nanodiamonds as siRNA vectors : in vitro efficacy evaluation and high-content/high-resolution quantifications of their distribution in vivo" @default.
- W2808032841 hasPublicationYear "2018" @default.
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