基于纳米乳-凝胶技术的雷公藤多苷纳米载体的制备及药效学研究

Development of Tripterygium glycosides nano-carries based on″nanoemulsion-gels″ and its pharmacodynamics

该研究采用"纳米乳-凝胶技术"制备雷公藤多苷纳米凝胶,并对其药效学进行考察。以油酸作为油相,聚氧乙烯蓖麻油为表面活性剂,1,2-丙二醇为助表面活性剂,通过绘制伪三元相图确定雷公藤多苷纳米乳的处方组成,制备雷公藤多苷纳米凝胶。以7%的2,4-二硝基氯苯丙酮溶液致敏,0.3%的2,4-二硝基氯苯溶液多次激发建立小鼠耳慢性皮炎湿疹模型,考察雷公藤多苷纳米凝胶对小鼠耳肿胀及皮肤红肿的影响;并采用ELISA法测定血清中IFN-γ,IL-4和IL-8等细胞因子的浓度,对雷公藤多苷纳米凝胶的药效学进行考察。结果表明,雷公藤多苷纳米凝胶可以显著抑制小鼠耳肿胀度(P<0.01),并可以改善造模后小鼠耳部皮肤出现的水肿、红斑情况。雷公藤多苷纳米凝胶还可以显著降低模型小鼠血清中IFN-γ和IL-4的表达。该研究制备的雷公藤多苷纳米凝胶对小鼠皮炎湿疹模型具有良好的治疗效果,有望为临床皮炎湿疹的治疗提供一种新型外用长效制剂。

The aim of this study is to develop the Tripterygium glycosides nanoemulsion gels and investigate its pharmacodynamics. Oleic acid was used as oil phase, polyoxyethylene castor oil as surfaetant, and 1,2-propanediol as cosurfactant to screen the formula of Tripterygium glycoside nanoemulsion using the pseudo-temary phase diagrams. Then the nanoemulsion gels was prepared. The ICR mouse ears were sensitazated by 7% DNCB, and then were excited by 0. 3% DNCB to stimulate the model of mouse chronic dermatitis and eczema, The concentrations of IFN-γ, IL-4 and IL-8 in mouse blood were determined by ELISA. The results showed that Tripterygi- um glycosides nanoemulsion gels could significantly inhibit the swelling of mouse ears（ P 〈 0.01 ）and ameliorate the edama and erythe- ma of model mouse ears skin. Also it could significantly decrease the expression of IFN-γ and IL-4 in model mouse blood. Tripterygium glycosides nanoemulsion gels had a good therapeutic effect on mouse model of dermatitis and eczema. It was expected to provide a new and long-acting exterernal preparation for the treatment of dermatitis and eczema.