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- Title
Luminescent Difluoroboron β-Diketonate PEG-PLA Oxygen Nanosensors for Tumor Imaging.
- Authors
Samonina‐Kosicka, Jelena; Weitzel, Douglas H.; Hofmann, Christina L.; Hendargo, Hansford; Hanna, Gabi; Dewhirst, Mark W.; Palmer, Gregory M.; Fraser, Cassandra L.
- 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, 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.
- Subjects
NANOSENSORS; POLYLACTIC acid; POLYETHYLENE glycol; IMAGING of cancer; DYES in medical diagnosis; BORON compounds
- Publication
Macromolecular Rapid Communications, 2015, Vol 36, Issue 7, p694
- ISSN
1022-1336
- Publication type
Article
- DOI
10.1002/marc.201500022