Universite Claude Bernard – Lyon1

Institut National Des Sciences Appliquees De Lyon

Nanoh

Université Lyon 1 Claude Bernard

Maxime Saint Jean

Olivier Tillement

Stéphane Roux

François Lux

Pascal Perriat

Pierre Mowat

Anna Mignot

The invention relates to novel biocompatible hybrid nanoparticles of very small size, useful in particular for diagnostics and/or therapy. The purpose of the invention is to offer novel nanoparticles which are useful in particular as contrast agents in imaging (e.g. MRI) and/or in other diagnostic techniques and/or as therapeutic agents, which give better performance than the known nanoparticles of the same type and which combine both a small size (for example less than 20 nm) and a high loading with metals (e.g. rare earths), in particular so as to have, in imaging (e.g. MRI), strong intensification and a correct response (increased relaxivity) at high frequencies. Thus, the nanoparticles according to the invention, with diameter dbetween 1 and 20 nm, each comprise a polyorganosiloxane (POS) matrix including gadolinium cations optionally associated with doping cations; a chelating graft CDTPABA (diethylenetriaminepentaacetic acid bisanhydride) bound to the POS matrix by an &#x2014;Si&#x2014;C&#x2014; covalent bond, and present in sufficient quantity to be able to complex all the gadolinium cations; and optionally another functionalizing graft Gf* bound to the POS matrix by an &#x2014;Si&#x2014;C&#x2014; covalent bond (where Gf* can be derived from a hydrophilic compound (PEG); from a compound having an active ingredient PA1; from a targeting compound; from a luminescent compound (fluorescein). The method for the production of these nanoparticles and the applications thereof in imaging and in therapy also form part of the invention.

Ultrafine nanoparticles comprising a functionalized polyorganosiloxane matrix and including metal complexes; method for obtaining same and uses thereof in medical imaging and/or therapy

The invention relates to novel biocompatible hybrid nanoparticles of very small size, useful in particular for diagnostics and/or therapy. The purpose of the invention is to offer novel nanoparticles which are useful in particular as contrast agents in imaging (e.g. MRI) and/or in other diagnostic techniques and/or as therapeutic agents, which give better performance than the known nanoparticles of the same type and which combine both a small size (for example less than 20 nm) and a high loading with metals (e.g. rare earths), in particular so as to have, in imaging (e.g. MRI), strong intensification and a correct response (increased relaxivity) at high frequencies. The method for the production of these nanoparticles and the applications thereof in imaging and in therapy also form part of the invention.

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Maxime Saint Jean