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Molecules 2017, 22(6), 870;

Preparation, Characterization, and Antioxidant Activity Evaluation of Liposomes Containing Water-Soluble Hydroxytyrosol from Olive

School of Chemical Engineering and Energy Technology, Dongguan University of Technology, Dongguan 523808, China
School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, China
Authors to whom correspondence should be addressed.
Academic Editor: Derek J. McPhee
Received: 15 April 2017 / Revised: 19 May 2017 / Accepted: 19 May 2017 / Published: 24 May 2017
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Due to the multiple hydroxyl groups in its structure, hydroxytyrosol (HT) is very sensitive to air and light and has very strong instability and hydrophilicity that affect its biological activity. This study attempted to prepare liposomes containing water-soluble HT to improve the bioavailability and biocompatibility of the target drug. The preparation process factors (temperature, mass ratio of phospholipid (PL) and cholesterol (CH), Tween-80 volume, HT mass) were studied and response surface methodology (RSM) was applied to optimize the conditions. The results demonstrated that by using a temperature of 63 °C, mass ratio of PL and CH 4.5:1, HT mass 5 mg and Tween-80 volume of 6 mL, HT liposomes with an encapsulation efficiency (EE) of 45.08% were prepared. It was found that the particle sizes of the HT liposomes were well distributed in the range of 100–400 nm. Compared to free HT, prepared HT liposomes had better stability and a distinct slow release effect in vitro. Besides, HT liposomes presented better DPPH radical scavenging activity than free HT, which could be due to the fact that HT was encapsulated fully inside the liposomes. In addition, the encapsulation mechanism of HT was evaluated. In summary, the results indicated that HT liposome could enhance the antioxidant activity and was a promising formulation for prolonging the biological activity time of the target drug. View Full-Text
Keywords: hydroxytyrosol; liposomes; preparation; slow release; antioxidant activity hydroxytyrosol; liposomes; preparation; slow release; antioxidant activity

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Yuan, J.-J.; Qin, F.G.; Tu, J.-L.; Li, B. Preparation, Characterization, and Antioxidant Activity Evaluation of Liposomes Containing Water-Soluble Hydroxytyrosol from Olive. Molecules 2017, 22, 870.

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