ArticlePharmaceutical research2012
Drug release patterns and cytotoxicity of PEG-poly(aspartate) block copolymer micelles in cancer cells.
Article in Pharmaceutical research, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
6 citing papers in PubMed, 41 citations in OpenAlex.
- Highly photostable nanogels for fluorescence-based theranostics.Bioactive materials · 2018Article
- Comparison of Dialysis- and Solvatofluorochromism-Based Methods to Determine Drug Release Rates from Polymer Nanoassemblies.Pharmaceutical research · 2017Article
- A Computational/Experimental Assessment of Antitumor Activity of Polymer Nanoassemblies for pH-Controlled Drug Delivery to Primary and Metastatic Tumors.Pharmaceutical research · 2016Article
- Nanoparticle-mediated drug delivery for treating melanoma.Nanomedicine (London, England) · 2015Review
- Biodegradable cationic polymeric nanocapsules for overcoming multidrug resistance and enabling drug-gene co-delivery to cancer cells.Nanoscale · 2014Article
- Pharmaceutical differences between block copolymer self-assembled and cross-linked nanoassemblies as carriers for tunable drug release.Pharmaceutical research · 2013Article
Corrections and comments
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Authors and funding
5 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
purposeTo test physicochemical and biological properties of PEG-poly(aspartate) [PEG-p(Asp)] block copolymer micelles entrapping doxorubicin hydrochloride (DOX) through ionic interaction.
methodsPEG-p(Asp) was synthesized from 5 kDa PEG and 20 Asp units. Carboxyl groups of p(Asp) were present as benzyl ester [PEG-p(Asp/Bz)], sodium salt [PEG-p(Asp/Na)] or free acid [PEG-p(Asp/H)]. Block copolymers and DOX were mixed at various ratios to prepare polymer micelles, which were subsequently characterized to determine particle size, drug loading and release patterns, and cytotoxicity against prostate (PC3 and DU145) and lung (A549) cancer cell lines.
resultsPEG-p(Asp/Bz), Na- and H-micelles entrapped 1.1, 56.8 and 40.6 wt.% of DOX, respectively. Na- and H-micelles (<100 nm) showed time-dependent DOX release at pH 7.4, which was accelerated at pH 5.0. Na-micelles were most stable at pH 7.4, retaining 31.8% of initial DOX for 48 h. Cytotoxicity of Na-micelles was 23.2% (A549), 28.5% (PC3) and 45.9% (DU145) more effective than free DOX.
conclusionIonic interaction appeared to entrap DOX efficiently in polymer micelles from PEG-p(Asp) block copolymers. Polymer micelles possessing counter ions (Na) of DOX in the core were the most stable, releasing drugs for prolonged time in a pH-dependent manner, and suppressing cancer cells effectively.
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