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Surface-modified solid lipid nanoparticles for oral delivery of docetaxel: enhanced intestinal absorption and lymphatic uptake

Authors Cho HJ, Park JW, Yoon IS, Kim DD

Received 26 October 2013

Accepted for publication 6 December 2013

Published 13 January 2014 Volume 2014:9(1) Pages 495—504

DOI https://doi.org/10.2147/IJN.S56648

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 2

Hyun-Jong Cho1, Jin Woo Park2, In-Soo Yoon2, Dae-Duk Kim3

1College of Pharmacy, Kangwon National University, Chuncheon, 2College of Pharmacy and Natural Medicine Research Institute, Mokpo National University, Jeonnam, 3College of Pharmacy and Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul, Republic of Korea

Abstract: Docetaxel is a potent anticancer drug, but development of an oral formulation has been hindered mainly due to its poor oral bioavailability. In this study, solid lipid nanoparticles (SLNs) surface-modified by Tween 80 or D-alpha-tocopheryl poly(ethylene glycol 1000) succinate (TPGS 1000) were prepared and evaluated in terms of their feasibility as oral delivery systems for docetaxel. Tween 80-emulsified and TPGS 1000-emulsified tristearin-based lipidic nanoparticles were prepared by a solvent-diffusion method, and their particle size distribution, zeta potential, drug loading, and particle morphology were characterized. An in vitro release study showed a sustained-release profile of docetaxel from the SLNs compared with an intravenous docetaxel formulation (Taxotere®). Tween 80-emulsified SLNs showed enhanced intestinal absorption, lymphatic uptake, and relative oral bioavailability of docetaxel compared with Taxotere in rats. These results may be attributable to the absorption-enhancing effects of the tristearin nanoparticle. Moreover, compared with Tween 80-emulsified SLNs, the intestinal absorption and relative oral bioavailability of docetaxel in rats were further improved in TPGS 1000-emulsified SLNs, probably due to better inhibition of drug efflux by TPGS 1000, along with intestinal lymphatic uptake. Taken together, it is worth noting that these surface-modified SLNs may serve as efficient oral delivery systems for docetaxel.

Keywords: solid lipid nanoparticles, vitamin E TPGS, docetaxel, lymphatic uptake, bioavailability, toxicity

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