Ultrasmall Silica-Based Bismuth Gadolinium Nanoparticles for Dual Magnetic Resonance–Computed Tomography Image Guided Radiation Therapy

Alexandre Detappe (1, 2, 3) , Eloise Thomas (2) , Mark W Tibbitt || (4) , Sijumon Kunjachan (3, 1) , Oksana Zavidij (5) , Nishita Parnandi (1) , Elizaveta Reznichenko (1) , François Lux (2) , Olivier Tillement (2) , Ross Berbeco (1, 3)

1 Dana-Farber Cancer Institute [Boston]
2 ILM - Institut Lumière Matière [Villeurbanne]
3 Department of Radiation Oncology
4 David H. Koch Institute for Integrative Cancer Research
5 Department of Medical Oncology

Selective killing of cancer cells while minimizing damage to healthy tissues is the goal of clinical radiation therapy. This therapeutic ratio can be improved by image-guided radiation delivery and selective radiosensitization of cancer cells. Here, we have designed and tested a novel trimodal theranostic nanoparticle made of bismuth and gadolinium for on-site radiosensitization and image contrast enhancement to improve the efficacy and accuracy of radiation therapy. We demonstrate in vivo magnetic resonance (MR), computed tomography (CT) contrast enhancement, and tumor suppression with prolonged survival in a non-small cell lung carcinoma model during clinical radiation therapy. Histological studies show minimal off-target toxicities due to the nanoparticles or radiation. By mimicking existing clinical workflows, we show that the bismuth–gadolinium nanoparticles are highly compatible with current CT-guided radiation therapy and emerging MR-* Corresponding Authors:

Mots clés: nanomedicine; Radiosentization; image-guided radiation therapy; bismuth; nanoparticle

Domaines: Cancer; Imagerie; Physique Médicale [physics.med-ph]; Chimie thérapeutique

Alexandre Detappe, Eloise Thomas, Mark W Tibbitt ||, Sijumon Kunjachan, Oksana Zavidij, et al.. Ultrasmall Silica-Based Bismuth Gadolinium Nanoparticles for Dual Magnetic Resonance–Computed Tomography Image Guided Radiation Therapy. Nano Letters, 2017, 17 (3), pp.1733 - 1740. ⟨10.1021/acs.nanolett.6b05055⟩. ⟨hal-01689566⟩