白疕软膏治疗银屑病的机理研究

【作者】 陶春蓉；

【导师】 艾儒棣；

【作者基本信息】 成都中医药大学 ， 中医外科学， 2008， 博士

【摘要】 目的:探讨白疕软膏治疗银屑病的作用机理。方法:实验采用5%心得安乳剂建立豚鼠银屑病样皮炎模型,观察白疙软膏对豚鼠银屑病样皮炎模型组织病理改变的影响;采用放射免疫法检测豚鼠银屑病样皮炎模型皮损中细胞因子IL-2、IL-6、IL-8的水平,观察白疕软膏对豚鼠银屑病样皮炎模型皮损中细胞因子的影响;采用MTT法研究了中药白疕方提取液及白疕方主要组成药物大黄、黄柏、黄精、苦参提取液对角质形成细胞系HaCaT细胞增殖的影响及对TNF-α刺激后的角质形成细胞系HaCaT细胞增殖的影响。结果:白疕软膏对豚鼠银屑病样皮炎模型组织病理改变有影响,Baker评分白疕软膏组为2.70±0.67,与模型组6.20±1.42比较,差异有显著性(p<0.05),与对照组喜树碱软膏组3.00±0.58比较,差异无显著性(p>0.05)。白疕软膏对豚鼠银屑病样皮炎模型皮损中细胞因子水平有影响,豚鼠银屑病样皮炎模型皮损中IL-2、IL-6水平增高,与空白对照组比较,差异有显著性(p<0.05);白疕软膏组、喜树碱软膏组皮损中IL-2、IL-6水平降低,与模型组比较,差异有显著性(p<0.05)。细胞培养实验显示:中药白疕方提取液及白疕方主要组成药物大黄、黄柏、黄精、苦参提取液对角质形成细胞系HaCaT细胞增殖及对TNF-α刺激后的角质形成细胞系HaCaT细胞增殖均有抑制作用,且呈剂量依赖性。结论:白疕软膏对豚鼠银屑病样皮炎模型组织病理改变有治疗作用,其作用机理可能是通过对角质形成细胞增殖的抑制及对细胞因子的调节而发挥作用。白疕软膏是治疗银屑病的有效外用制剂,值得进一步研究和推广。更多还原

【Abstract】 Objective:The aim of this study is to investigate the effects and mechanisms of Baibi ointment for treating Psoriasis.Methods: 5% propranolol emulsion was applied externally on the back of a guinea pig’ s ear to produce the psoriasis-like dermatitis model to observe the effects of Baibi ointment on the histopathological changes of the model.Radioimmunoassay was used to observe the levels of cytokines like IL-2、IL—6 and IL-8, and the effects of the ointment to the cytokines. MTT method was used to study the effects of the extracts of the Baibi Formula and the extracts of its main components Huangjing , Kushen , Dahuang ,Huangbai, to the multiplication of HaCaT cells—one of the Malpighian cell line with and without stimulation of TNF-α.Results:Baibi ointment showed some effects on the histopathological changes of the models. It showed that the Baibi ointment Group was 2.70±0.67 and the model group was 6.20±1.42 by Baker score,p<0.05;while compared with the control group-Camptothecine ointment group which was 3.00±0.58,p >0.05.Baibi ointment was effective to the levels of cytokines also.Increased levels of IL-2、IL-6 were showed in the model group,compare with the controlled blank group p<0.05, decreaed levies of IL-2>IL? were showed in the Baibi Ointment group and Camptothecine ointment group, compared with the model group, p < 0.05.Cell culture experiments showed that the extracts of the Baibi Formula and the extracts of its main components Dahuang, Kushen , Huangbai, Huangjing were effective in inhibiting the multiplication of HaCaT cells with or without the stimulation of TNF-αand the relationship between the two was dose dependent.Conclusion:Baibi ointment has therapeutical effects on the histopathological changes of the models of psoriasis-like dermatitis in guinea pigs. The mechanism is probably by inhibiting the multiplication of the Malpighian cell and regulating the cytokines. Thus, Baibi ointment is an effective external preparation to treat psoriasis, and is worthy of deeper reasearch and generalization.更多还原