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Poly(styrene)-b-poly(DL-lactide) copolymer-based nanoparticles for anticancer drug delivery

Authors Lee JY, Kim JS, Cho HJ, Kim DD

Received 20 February 2014

Accepted for publication 9 April 2014

Published 3 June 2014 Volume 2014:9(1) Pages 2803—2813

DOI https://doi.org/10.2147/IJN.S62806

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 6

Jae-Young Lee,1 Jung Sun Kim,2 Hyun-Jong Cho,3 Dae-Duk Kim1

1College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, Republic of Korea; 2Division of Health Sciences, Dongseo University, Busan, Republic of Korea; 3College of Pharmacy, Kangwon National University, Chuncheon, Republic of Korea

Abstract: Poly(styrene)-b-poly(DL-lactide) (PS-PDLLA) copolymer-based nanoparticles (NPs) of a narrow size distribution, negative zeta potential, and spherical shape were fabricated for the delivery of docetaxel (DCT). The particle size was consistently maintained in serum for 24 hours and a sustained drug release pattern was observed for 10 days in the tested formulations. The cytotoxicity of the developed blank NPs was negligible in prostate cancer (PC-3) cells. Cellular uptake and distribution of the constructed NPs containing a hydrophobic fluorescent dye was monitored by confocal laser scanning microscopy (CLSM) for 24 hours. Anti-tumor efficacy of the PS-PDLLA/DCT NPs in PC-3 cells was significantly more potent than that of the group treated with commercially available DCT, Taxotere® (P<0.05). Blood biochemistry tests showed that no serious toxicity was observed with the blank NPs in the liver and kidney. In a pharmacokinetic study of DCT in rats, in vivo clearance of PS-PDLLA/DCT NPs decreased while the half-life in blood increased compared to the Taxotere-treated group (P<0.05). The PS-PDLLA NPs are expected to be a biocompatible and efficient nano-delivery system for anticancer drugs.

Keywords: docetaxel, prolonged blood circulation, prostate cancer


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