Neutron Activated Sm Sealed in Carbon Nanocapsules for Imaging and Tumor Radiotherapy.
Fiche publication
Date publication
janvier 2020
Journal
ACS nano
Auteurs
Membres identifiés du Cancéropôle Est :
Dr MENARD-MOYON Cécilia, Dr BIANCO Alberto
Tous les auteurs :
Wang JT, Klippstein R, Martincic M, Pach E, Feldman R, Šefl M, Michel Y, Asker D, Sosabowski JK, Kalbac M, Da Ros T, Ménard-Moyon C, Bianco A, Kyriakou I, Emfietzoglou D, Saccavini JC, Ballesteros B, Al-Jamal KT, Tobias G
Lien Pubmed
Résumé
Radiation therapy along with chemotherapy and surgery remain the main cancer treatments. Radiotherapy can be applied to patients externally (external beam radiotherapy) or internally (brachytherapy and radioisotope therapy). Previously, nanoencapsulation of radioactive crystals within carbon nanotubes, followed by end-closing, resulted in the formation of nanocapsules that allowed ultrasensitive imaging in healthy mice. Herein we report on the preparation of nanocapsules initially sealing "cold" isotopically enriched samarium (Sm), which can then be activated on demand to their "hot" radioactive form (Sm) by neutron irradiation. The use of "cold" isotopes avoids the need for radioactive facilities during the preparation of the nanocapsules, reduces radiation exposure to personnel, prevents the generation of nuclear waste, and evades the time constraints imposed by the decay of radionuclides. A very high specific radioactivity is achieved by neutron irradiation (up to 11.37 GBq/mg), making the "hot" nanocapsules useful not only for imaging but also therapeutically effective against lung cancer metastases after intravenous injection. The high stability of the radioactive payload, selective toxicity to cancerous tissues, and the elegant preparation method offer a paradigm for application of nanomaterials in radiotherapy.
Mots clés
cancer therapy, filled carbon nanotubes, nanoencapsulation, nanooncology, nuclear imaging, radiooncology
Référence
ACS Nano. 2020 01 28;14(1):129-141