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Cellular trafficking and anticancer activity of Garcinia mangostana extract-encapsulated polymeric nanoparticles

Authors Pan-In P, Wanichwecharungruang S, Hanes J, Kim AJ

Received 19 April 2014

Accepted for publication 24 May 2014

Published 6 August 2014 Volume 2014:9(1) Pages 3677—3686

DOI https://doi.org/10.2147/IJN.S66511

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 2

Porntip Pan-In,1,2 Supason Wanichwecharungruang,3,4 Justin Hanes,2,5 Anthony J Kim2,6,7

1Program in Biotechnology, Faculty of Science, Chulalongkorn University, Bangkok, Thailand; 2Center for Nanomedicine, Johns Hopkins University School of Medicine, Baltimore, MD, USA; 3Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok, Thailand; 4Nanotec-CU Center of Excellence on Food and Agriculture, Bangkok, Thailand; 5Department of Ophthalmology, Biomedical Engineering, Chemical and Biomolecular Engineering, Neurosurgery, and Oncology, Johns Hopkins University School of Medicine, 6Department of Neurosurgery, University of Maryland School of Medicine, 7Department of Pharmaceutical Sciences, University of Maryland School of Pharmacy, Baltimore, MD, USA

Abstract: Garcinia mangostana Linn extract (GME) is a natural product that has received considerable attention in cancer therapy, and has the potential to reduce side effects of chemotherapeutics and improve efficacy. We formulated GME-encapsulated ethyl cellulose (GME-EC) and a polymer blend of ethyl cellulose and methyl cellulose (GME-EC/MC) nanoparticles. We achieved high drug-loading and encapsulation efficiency using a solvent-displacement method with particle sizes around 250 nm. Cellular uptake and accumulation of GME was higher for GME-encapsulated nanoparticles compared to free GME. In vitro cytotoxicity analysis showed effective anticancer activity of GME-EC and GME-EC/MC nanoparticles in HeLa cells in a dose-dependent manner. GME-EC/MC nanoparticles showed approximately twofold-higher anticancer activity compared to GME-EC nanoparticles, likely due to their enhanced bioavailability. GME-encapsulated nanoparticles primarily entered HeLa cells by clathrin-mediated endocytosis and trafficked through the endolysosomal pathway. As far as we know, this is the first report on the cellular uptake and intracellular trafficking mechanism of drug-loaded cellulose-based nanoparticles. In summary, encapsulation of GME using cellulose-derivative nanoparticles – GME-EC and GME-EC/MC nanoparticles – successfully improved the bioavailability of GME in aqueous solution, enhanced cellular uptake, and displayed effective anticancer activity.

Keywords: phytotherapy, cancer, nanoparticles, cellulose, intracellular trafficking

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