Back to Journals » International Journal of Nanomedicine » Volume 13

Theranostic pH-sensitive nanoparticles for highly efficient targeted delivery of doxorubicin for breast tumor treatment

Authors Pan C, Liu Y, Zhou M, Wang W, Shi M, Xing M, Liao W

Received 27 July 2017

Accepted for publication 31 October 2017

Published 27 February 2018 Volume 2018:13 Pages 1119—1137

DOI https://doi.org/10.2147/IJN.S147464

Checked for plagiarism Yes

Review by Single-blind

Peer reviewers approved by Dr Alexander Kharlamov

Peer reviewer comments 2

Editor who approved publication: Dr Thomas Webster


Changqie Pan,1–3,* Yuqing Liu,2,3,* Minyu Zhou,1 Wensheng Wang,4 Min Shi,1 Malcolm Xing,2,3,5 Wangjun Liao1

1Department of Oncology, Nanfang Hospital, Southern Medical University, Guangzhou, China; 2Department of Mechanical Engineering, 3Department of Biochemistry and Medical Genetics, University of Manitoba, Winnipeg, MB, Canada; 4The Imaging Center, 999 Brain Hospital, Guangzhou, China; 5Children’s Hospital Research Institute of Manitoba, Winnipeg, MB, Canada

*These authors contributed equally to this work

Abstract: A multifunctional theranostic nanoplatform integrated with environmental responses has been developed rapidly over the past few years as a novel treatment strategy for several solid tumors. We synthesized pH-sensitive poly(β-thiopropionate) nanoparticles with a supermagnetic core and folic acid (FA) conjugation (FA-doxorubicin-iron oxide nanoparticles [FA-DOX@IONPs]) to deliver an antineoplastic drug, DOX, for the treatment of folate receptor (FR)-overexpressed breast cancer. In addition to an imaging function, the nanoparticles can release their payloads in response to an environment of pH 5, such as the acidic environment found in tumors. After chemical (1H nuclear magnetic resonance) and physical (morphology and supermagnetic) characterization, FA-DOX@IONPs were shown to demonstrate pH-dependent drug release profiles. Western blotting analysis revealed the expression of FRs in three breast cancer cell lines, MCF-7, BT549, and MD-MBA-231. The cell counting kit-8 assay and transmission electron microscopy showed that FA-DOX@IONPs had the strongest cytotoxicity against breast cancer cells, compared with free DOX and non-FR targeted nanoparticles (DOX@IONPs), and caused cellular apoptosis. The FA-DOX@IONP-mediated cellular uptake and intracellular internalization were clarified by fluorescence microscopy. FA-DOX@IONPs plus magnetic field treatment suppressed in vivo tumor growth in mice to a greater extent than either treatment alone; furthermore, the nanoparticles exerted no toxicity against healthy organs. Magnetic resonance imaging was successfully applied to monitor the nanoparticle accumulation. Our results suggest that theranostic pH-sensitive nanoparticles with dual targeting could enhance the available therapies for cancer.

Keywords: theranostics, magnetic nanoparticle, pH sensitivity, folate receptor targeting, breast cancer

Creative Commons License This work is published and licensed by Dove Medical Press Limited. The full terms of this license are available at https://www.dovepress.com/terms.php and incorporate the Creative Commons Attribution - Non Commercial (unported, v3.0) License. By accessing the work you hereby accept the Terms. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed. For permission for commercial use of this work, please see paragraphs 4.2 and 5 of our Terms.

Download Article [PDF]  View Full Text [HTML][Machine readable]