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


Journal Article

© 2015 Wiley-VCH Verlag GmbH & Co. KGaA. 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, BF2dbm(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 BF2dbm(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 BF2dbm(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. (Graph Presented)

Full Text

Duke Authors

Cited Authors

  • Samonina-Kosicka, J; Weitzel, DH; Hofmann, CL; Hendargo, H; Hanna, G; Dewhirst, MW; Palmer, GM; Fraser, CL

Published Date

  • April 1, 2015

Published In

Volume / Issue

  • 36 / 7

Start / End Page

  • 694 - 699

Electronic International Standard Serial Number (EISSN)

  • 1521-3927

International Standard Serial Number (ISSN)

  • 1022-1336

Digital Object Identifier (DOI)

  • 10.1002/marc.201500022

Citation Source

  • Scopus