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IR820‐loaded PLGA nanoparticles for photothermal therapy of triple‐negative breast cancer
Author(s) -
Valcourt Danielle M.,
Dang Megan N.,
Day Emily S.
Publication year - 2019
Publication title -
journal of biomedical materials research part a
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.849
H-Index - 150
eISSN - 1552-4965
pISSN - 1549-3296
DOI - 10.1002/jbm.a.36685
Subject(s) - photothermal therapy , plga , materials science , triple negative breast cancer , breast cancer , cancer research , in vivo , nanotechnology , cancer , cancer cell , nanoparticle , apoptosis , biomedical engineering , medicine , chemistry , biology , biochemistry , microbiology and biotechnology
Abstract Triple‐negative breast cancer (TNBC) accounts for 15–25% of breast cancer cases and lacks expression of the three most common receptors seen on other subtypes of breast cancer. This lack of expression makes TNBC unsusceptible to currently available targeted or hormonal therapies, so new treatment strategies are desperately needed. Photothermal therapy (PTT), which utilizes nanoparticles (NPs) embedded in tumors as exogenous energy absorbers to convert externally applied near‐infrared (NIR) light into heat to ablate cancer cells, has shown promise as an alternative strategy. However, it typically uses gold‐based NPs that will remain in the body for extended period of time with unknown long‐term health effects. To enable PTT with biodegradable, polymeric NPs, we encapsulated the NIR‐absorbing dye IR820 in poly(lactic‐ co ‐glycolic acid) (PLGA) NPs. We characterized the physicochemical properties of these IR820‐loaded PLGA NPs and evaluated their performance as PTT agents using both in vitro and in vivo models of TNBC. The results demonstrate that these NPs are potent mediators of PTT that induce cell death primarily through apoptosis to effectively hinder the growth of TNBC tumors. © 2019 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 107A: 1702–1712, 2019.