Skip to Main content Skip to Navigation
Journal articles

The use of theranostic gadolinium-based nanoprobes to improve radiotherapy efficacy

Lucie Sancey 1 François Lux 1 Shady Kotb 1 Stéphane Roux 2 Sandrine Dufort 3, 4 Andrea Bianchi 5 Yannick Cremillieux 5 Peter Fries 6 Jean-Luc Coll 4 Claire Rodriguez-Lafrasse 7, 8 Marc Janier 1 Marie Dutreix 9 Muriel Barberi-Heyob 10, 11 Frédéric Boschetti 12 Franck Denat 13 Cédric Louis 3 Erika Porcel 14 Sandrine Lacombe 14 Géraldine Le Duc 15 Eric Deutsch 16, 17 Jean-Luc Perfettini 16, 18 Alexandre Detappe 19 Camille Verry 1, 20 Ross Berbeco 19 Karl Butterworth 21 Stephen Mcmahon 21, 22 Kevin Prise 21 Pascal Perriat 23 Olivier Tillement 1
Abstract : A new efficient type of gadolinium-based theranostic agent (AGuIX) has recently been developed for magnetic resonance imaging (MRI)-guided radiotherapy. These new particles consist of a polysiloxane network surrounded by a number of gadolinium chelates, usually 10. Due to their small size (<5 nm), AGuIX typically exhibit biodistributions that are almost ideal for diagnostic and therapeutic purposes. For example, while a significant proportion of these particles accumulate in tumours, the remainder is rapidly eliminated by the renal route. In addition, these particles present no evidence of toxicity, in the absence of irradiation with up to 10 times the planned dose for clinical trials. AGuIX particles have been proven to act as efficient radiosensitizers in a large variety of experimental in vitro scenarios, including different radioresistant cell lines, irradiation energies, and radiation sources (sensitizing enhancement ratio ranging from 1.1 to 2.5). Preclinical studies have also demonstrated the impact of these particles on different heterotopic and orthotopic tumours, with both intra-tumoural or intravenous injection routes. A significant therapeutical effect has been observed in all contexts. Furthermore, MRI monitoring was proven to efficiently aid in determining a radiotherapy protocol and assessing tumour evolution following treatment. The usual theoretical models, based on energy attenuation and macroscopic dose enhancement, cannot account for all the results that have been obtained. Only theoretical models, which take into account the Auger electron cascades that occur between the different atoms constituting the particle and the related high radical concentrations in the vicinity of the particle, provide an explanation for the complex cell damage and death observed.
Document type :
Journal articles
Complete list of metadata
Contributor : Béatrice Rayet <>
Submitted on : Wednesday, February 10, 2021 - 9:00:16 AM
Last modification on : Thursday, April 8, 2021 - 3:38:01 AM


Publisher files allowed on an open archive



Lucie Sancey, François Lux, Shady Kotb, Stéphane Roux, Sandrine Dufort, et al.. The use of theranostic gadolinium-based nanoprobes to improve radiotherapy efficacy. British Journal of Radiology, British Institute of Radiology, 2014, 87 (1041), pp.20140134. ⟨10.1259/bjr.20140134⟩. ⟨hal-01053790⟩



Record views


Files downloads