Luminescent difluoroboron β-diketonate PEG-PLA oxygen nanosensors for tumor imaging

Macromolecular Rapid Communications
Jelena Samonina-KosickaCassandra L Fraser

Abstract

Surface modification of nanoparticles and biosensors is a dynamic, expanding area of research for targeted delivery in vivo. For more efficient delivery, surfaces are PEGylated to impart stealth properties, long circulation, and enable enhanced permeability and retention (EPR) in tumor tissues. Previously, BF2 dbm(I)PLA was proven to be a good oxygen nanosensor material for tumor hypoxia imaging in vivo, though particles were applied directly to the tumor and surrounding region. Further surface modification is needed for this dual-emissive oxygen sensitive material for effective intravenous (IV) administration and passive and active delivery to tumors. In this paper, an efficient synthesis of a new dual-emissive material BF2 dbm(I)PLA-mPEG is presented and in vitro stability studies are conducted. It is found that fabricated nanoparticles are stable for 24 weeks as a suspension, while after 25 weeks the nanoparticles swell and both dye and polymer degradation escalates. Preliminary studies show BF2 dbm(I)PLA-mPEG nanoparticle accumulation in a window chamber mammary tumor 24 h after IV injection into mice (C57Bl/6 strain) enabling tumor oxygen imaging.

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Citations

Mar 19, 2016·Chemphyschem : a European Journal of Chemical Physics and Physical Chemistry·Pierre-Henri LanoëChantal Andraud
Oct 20, 2015·ACS Applied Materials & Interfaces·Christopher A DeRosaCassandra L Fraser
Feb 7, 2020·Biomaterials Science·Maura C BelangerRebecca R Pompano
Mar 1, 2017·ChemPlusChem·Christopher A DeRosaCassandra L Fraser
Feb 6, 2017·Biomacromolecules·Caroline KerrCassandra L Fraser

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