Noninvasive imaging of tumor hypoxia after nanoparticle-mediated tumor vascular disruption.
Fiche publication
Date publication
janvier 2020
Journal
PloS one
Auteurs
Membres identifiés du Cancéropôle Est :
Dr DETAPPE Alexandre
Tous les auteurs :
Virani NA, Kelada OJ, Kunjachan S, Detappe A, Kwon J, Hayashi J, Vazquez-Pagan A, Biancur DE, Ireland T, Kumar R, Sridhar S, Makrigiorgos GM, Berbeco RI
Lien Pubmed
Résumé
We have previously demonstrated that endothelial targeting of gold nanoparticles followed by external beam irradiation can cause specific tumor vascular disruption in mouse models of cancer. The induced vascular damage may lead to changes in tumor physiology, including tumor hypoxia, thereby compromising future therapeutic interventions. In this study, we investigate the dynamic changes in tumor hypoxia mediated by targeted gold nanoparticles and clinical radiation therapy (RT). By using noninvasive whole-body fluorescence imaging, tumor hypoxia was measured at baseline, on day 2 and day 13, post-tumor vascular disruption. A 2.5-fold increase (P<0.05) in tumor hypoxia was measured two days after combined therapy, resolving by day 13. In addition, the combination of vascular-targeted gold nanoparticles and radiation therapy resulted in a significant (P<0.05) suppression of tumor growth. This is the first study to demonstrate the tumor hypoxic physiological response and recovery after delivery of vascular-targeted gold nanoparticles followed by clinical radiation therapy in a human non-small cell lung cancer athymic Foxn1nu mouse model.
Référence
PLoS ONE. 2020 ;15(7):e0236245