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Pomegranate extract-loaded solid lipid nanoparticles: design, optimization, and in vitro cytotoxicity study

Authors Badawi NM, Teaima MH, El-Say KM, Attia DA, El-Nabarawi MA, Elmazar MM

Received 13 October 2017

Accepted for publication 23 December 2017

Published 6 March 2018 Volume 2018:13 Pages 1313—1326

DOI https://doi.org/10.2147/IJN.S154033

Checked for plagiarism Yes

Review by Single-blind

Peer reviewers approved by Dr Jiang Yang

Peer reviewer comments 6

Editor who approved publication: Dr Thomas Webster


Noha M Badawi,1 Mahmoud H Teaima,2 Khalid M El-Say,3 Dalia A Attia,1 Mohamed A El-Nabarawi,2 Mohey M Elmazar4

1Department of Pharmaceutics, Faculty of Pharmacy, The British University in Egypt, Cairo, Egypt; 2Department of Pharmaceutics and Industrial Pharmacy, Cairo University, Cairo, Egypt; 3Department of Pharmaceutics, King Abdulaziz University, Jeddah, Saudi Arabia; 4Department of Pharmacology, Faculty of Pharmacy, The British University in Egypt, Cairo, Egypt

Background: Pomegranate extract (PE) is a natural product with potent antioxidant and anticancer activity because of its polyphenols content. The main purpose of this study was to maximize the PE chemotherapeutic efficacy by loading it in an optimized solid lipid nanoparticles (SLNs) formula.
Materials and methods: The influence of independent variables, which were lipid concentration (X1), surfactant concentration (X2) and cosurfactant concentration (X3), on dependent ones, which were particle size (Y1), polydispersity index (Y2), zeta potential (Y3), entrapment efficiency (Y4) and cumulative % drug release (Y5), were studied and optimized using the Box–Behnken design. Fifteen formulations of PE-SLNs were prepared using hot homogenization followed by ultra-sonication technique. Response surface plots, Pareto charts and mathematical equations were produced to study the impact of independent variables on the dependent quality parameters. The anti-proliferative activity of the optimized formula was then evaluated in three different cancer cell lines, namely, MCF-7, PC-3 and HepG-2, in addition to one normal cell line, HFB-4.
Results: The results demonstrated that the particle sizes ranged from 407.5 to 651.9 nm and the entrapment efficiencies ranged from 56.02 to 65.23%. Interestingly, the 50% inhibitory concentration of the optimized formula had more than a 40-fold improved effect on the cell growth inhibition in comparison with its free counterpart. Furthermore, it was more selective against cancer cells than normal cells particularly in MCF-7 breast cancer cells.
Conclusion: These data proved that nanoencapsulation of PE enhanced its anticancer efficacy. Therefore, our results suggested that a PE-loaded SLNs optimized-formula could be a promising chemo­therapeutic agent.

Keywords: pomegranate extract, solid lipid nanoparticles, Box–Behnken design, optimization, cancer cell lines

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