Differences in Nanoparticle Uptake in Transplanted and Autochthonous Models of Pancreatic Cancer.
Fiche publication
Date publication
avril 2018
Journal
Nano letters
Auteurs
Membres identifiés du Cancéropôle Est :
Dr DETAPPE Alexandre
Tous les auteurs :
Tao Z, Muzumdar MD, Detappe A, Huang X, Xu ES, Yu Y, Mouhieddine TH, Song H, Jacks T, Ghoroghchian PP
Lien Pubmed
Résumé
Human pancreatic ductal adenocarcinoma (PDAC) contains a distinctively dense stroma that limits the accessibility of anticancer drugs, contributing to its poor overall prognosis. Nanoparticles can enhance drug delivery and retention in pancreatic tumors and have been utilized clinically for their treatment. In preclinical studies, various mouse models differentially recapitulate the microenvironmental features of human PDAC. Here, we demonstrate that through utilization of different organic cosolvents and by doping of a homopolymer of poly(ε-caprolactone), a diblock copolymer composition of poly(ethylene oxide)- block-poly(ε-caprolactone) may be utilized to generate biodegradable and nanoscale micelles with different physical properties. Noninvasive optical imaging was employed to examine the pharmacology and biodistribution of these various nanoparticle formulations in both allografted and autochthonous mouse models of PDAC. In contrast to the results reported with transplanted tumors, spherical micelles as large as 300 nm in diameter were found to extravasate in the autochthonous model, reaching a distance of approximately 20 μm from the nearest tumor cell clusters. A lipophilic platinum(IV) prodrug of oxaliplatin was further able to achieve a ∼7-fold higher peak accumulation and a ∼50-fold increase in its retention half-life in pancreatic tumors when delivered with 100 nm long worm-like micelles as when compared to the free drug formulation of oxaliplatin. Through further engineering of nanoparticle properties, as well as by widespread adoption of the autochthonous tumor model for preclinical testing, future therapeutic formulations may further enhance the targeting and penetration of anticancer agents to improve survival outcomes in PDAC.
Mots clés
Drug delivery, nanomedicine, optical imaging, pancreatic ductal adenocarcinoma, platinum(IV)
Référence
Nano Lett.. 2018 04 11;18(4):2195-2208