白藜芦醇脂质载体制备及体外抗氧化活性测定

白藜芦醇是一种天然功能性成分,具有美白、抗氧化等功效,可用于治疗改善多种皮肤病变,延缓细胞衰老。白黎芦醇在水中的溶解度低,稳定性较差,影响了其在医药及化妆品领域的应用。本研究制备了负载白黎芦醇的纳米结构脂质载体,提高了白藜芦醇的水中分散度、稳定性和功能活性。通过热高压均质法制备了白黎芦醇纳米结构脂质载体(NLC),确定了以单硬脂酸甘油酯为固态脂质,油酸为液态脂质,其比例为1∶[KG-*2/3]1,4%吐温80为乳化剂,均质压力为600 bar,循环3次时得到的白藜芦醇脂质载体粒径为179 nm,此时药物包封率为85.33%。MTT实验和ROS清除实验结果也表明白藜芦醇脂质载体浓度低于100μmol·L-1时都未对细胞产生明显毒性,并且有优于白藜芦醇原料药的抗氧化活性。

Preparation of Resveratrol-Nanostructured Lipid Carrier and Evaluation of in vitro Antioxidant Activity

Resveratrol is a natural functional component, with whitening, antioxidant and other effects, can be used to improve skin lesions and cell aging. Resveratrol has low solubility and poor stability in water, which impedes its application in medicine and cosmetics. The nanostructured lipid carrier loaded with resveratrol was prepared to improve the stability and functional activity of resveratrol. The resveratrol nanostructured lipid carrier(NLC) was prepared by thermal high pressure homogenization method, and the homogenization pressure was determined to be 600 bar with GMS as the solid lipid, oleic acid as the liquid lipid, with their ratio of 1:1, 4% Tween 80 as the emulsifier, and the smallest particle size of resveratrol lipid carrier was 179 nm after three cycles.The results of MTT experiment and ROS scavenging experiment also showed that resveratrol did not produce obvious toxicity to cells when the lipid carrier concentration of resveratrol was less than 100 μmol·L^-1, and had better antioxidant activity than resveratrol API.