NANOPARTICLES FOR THE TREATMENT OF CANCER BY RADIOFREQUENCY RADIATION
The present disclosure relates to a method for treating tumours. In particular, the invention relates to a new therapeutic use of nanoparticles as a sensitiser agent to radiofrequency radiation. More particularly, the invention relates to the use of nanoparticles in combination with radiofrequency radiations for the treatment of tumours, the radiofrequencies inducing hyperthermia of said tumour comprising the nanoparticles in the patient.
1 . A nanoparticle for use in the treatment of a tumour by a radiofrequency radiation in a patient inducing hyperthermia of said tumour, characterised in that said nanoparticle comprises a non-conductive and non-magnetic matrix and metal cations having an atomic number Z greater than 40, said nanoparticle being administered prior to said treatment by a radiofrequency radiation.
2 . The nanoparticle for use according to claim 1 , characterised in that the nanoparticle comprises a polysiloxane matrix.
3 . The nanoparticle for use according to claim 1 , characterised in that said nanoparticle comprises at least one chelating agent, preferably DOTA, DTPA, DOTAGA or derivatives thereof, intended to complex the metal cations.
4 . The nanoparticle for use according to claim 1 , characterised in that the metal cations represent more than 10% of the mass of said nanoparticle and preferably less than 50% of the mass of said nanoparticle.
5 . The nanoparticle for use according to claim 1 , characterised in that the metal cations are disposed at the surface of said matrix.
6 . The nanoparticle for use according to claim 1 , characterised in that the metal cations are gadolinium or bismuth.
7 . The nanoparticle for use according to claim 1 , characterised in that said nanoparticle has a size smaller than 10 nm, preferably smaller than 5 nm.
8 . The nanoparticle for use according to claim 1 , characterised in that the tumour is selected from the group consisting of kidney tumour, lung tumour, liver tumour, breast tumour, bone tumour.
9 . The nanoparticle for use according to claim 1 , characterised in that said nanoparticle is in a form suitable for administration intravenously, intratumourally or by inhalation.
10 . The nanoparticle for use according to claim 1 , characterised in that it has the general formula I hereinbelow:
wherein PS is a polysiloxane matrix, and n is comprised between 5 and 50, preferably between 5 and 20,
and wherein the hydrodynamic diameter is comprised between 1 and 10 nm, for example between 2 and 8 nm, in particular 5 nm.
11 . A radiofrequency hyperthermal sensitiser agent comprising a nanoparticle comprising a non-conductive and non-magnetic matrix and metal cations with an atomic number Z greater than 40.
12 . A method of treating a tumour by a radiofrequency radiation in a patient inducing hyperthermia of said tumour, comprising administering an effective does of nanoparticles into the tumour of said patient and exposing the tumour to radiofrequency radiation, wherein said nanoparticle comprises a non-conductive and non-magnetic matrix and metal cations having an atomic number Z greater than 40.