目的:通过药效试验筛选马钱子抗炎镇痛的主要药效成分,优选马钱子碱囊泡凝胶的体外透皮促渗剂。方法:考察不同马钱子提取物对佐剂性关节炎大鼠关节肿胀度和屈关节疼痛的影响,确定抗炎镇痛的关键成分。采用p H梯度法制备马钱子碱囊泡凝胶...目的:通过药效试验筛选马钱子抗炎镇痛的主要药效成分,优选马钱子碱囊泡凝胶的体外透皮促渗剂。方法:考察不同马钱子提取物对佐剂性关节炎大鼠关节肿胀度和屈关节疼痛的影响,确定抗炎镇痛的关键成分。采用p H梯度法制备马钱子碱囊泡凝胶,利用Franz扩散池进行体外透皮试验,扩散池透皮面积2.8 cm2,接受池体积6.5 m L,磁力搅拌速度500 r·min-1,水浴温度(37±1)℃,接受液为p H 7.4磷酸盐缓冲液,考察不同种类和不同用量促渗剂对该制剂体外渗透性能的影响。结果:马钱子碱是马钱子抗炎镇痛的主要药效成分。不同促渗剂均能促进马钱子碱囊泡凝胶的体外渗透性能,不同促渗剂对马钱子碱体外渗透的作用强弱顺序为氮酮>聚山梨酯-20>油酸聚乙二醇甘油酯>月桂酸聚乙二醇甘油酯>肉豆蔻酸异丙脂>聚甘油脂肪酸酯>乙醇>1-甲基-2-吡咯烷酮>水,不同用量氮酮对马钱子碱的促渗作用强弱为10%>7.5%>5%>3%>4%>2%>1%>0.5%。结论:马钱子碱具有抗炎镇痛作用,加入3%氮酮的马钱子囊泡凝胶体外透皮效果较好。展开更多
目的:制备并表征局部用咪喹莫特泡囊凝胶剂,考察药物皮内滞留效应。方法:制备并表征咪喹莫特泡囊凝胶剂,离体鼠皮透皮实验考察药物皮内滞留量和透过量,切片观察药物皮内分布。结果:泡囊的平均粒径197.2 nm,Zeta电位-42.97 m V,包封率27....目的:制备并表征局部用咪喹莫特泡囊凝胶剂,考察药物皮内滞留效应。方法:制备并表征咪喹莫特泡囊凝胶剂,离体鼠皮透皮实验考察药物皮内滞留量和透过量,切片观察药物皮内分布。结果:泡囊的平均粒径197.2 nm,Zeta电位-42.97 m V,包封率27.44%;泡囊凝胶剂体外释放t1/2与泡囊相似,但为凝胶剂的4.94倍和市售乳膏的3.83倍,12 h透过药量均比凝胶剂和市售乳膏小一半,单位面积皮内药物滞留量约为它们的2倍,切片显示药库效应显著。结论:泡囊凝胶剂具缓释作用和药库效应,可增加皮内滞留,减少角质层拦截和透过皮肤的药量,将有利于皮肤病的治疗,并可降低局部刺激性和全身毒性的风险。展开更多
Brucine has anti-inflammatory and analgesic effects and is the main active compound of the seeds of Strychnos nux-vomica L. To study brucine niosomal gels, a reliable and rapid LC-MS/MS method was established to quant...Brucine has anti-inflammatory and analgesic effects and is the main active compound of the seeds of Strychnos nux-vomica L. To study brucine niosomal gels, a reliable and rapid LC-MS/MS method was established to quantify brucine levels in rats. Tissue distribution and pharmacokinetics of brucine were investigated after topical and oral application of brucine niosomal gels to rats. The plasma concentration versus time profiles suggested that systemic exposure of brucine for oral administration of brucine niosomal gels was higher than that for topical administration, and topical administration showed a relatively sustained release. There was a considerable amount of brucine distributed in the knee joint. These results provided a strong basis for the follow-up study of this preparation.展开更多
文摘目的:通过药效试验筛选马钱子抗炎镇痛的主要药效成分,优选马钱子碱囊泡凝胶的体外透皮促渗剂。方法:考察不同马钱子提取物对佐剂性关节炎大鼠关节肿胀度和屈关节疼痛的影响,确定抗炎镇痛的关键成分。采用p H梯度法制备马钱子碱囊泡凝胶,利用Franz扩散池进行体外透皮试验,扩散池透皮面积2.8 cm2,接受池体积6.5 m L,磁力搅拌速度500 r·min-1,水浴温度(37±1)℃,接受液为p H 7.4磷酸盐缓冲液,考察不同种类和不同用量促渗剂对该制剂体外渗透性能的影响。结果:马钱子碱是马钱子抗炎镇痛的主要药效成分。不同促渗剂均能促进马钱子碱囊泡凝胶的体外渗透性能,不同促渗剂对马钱子碱体外渗透的作用强弱顺序为氮酮>聚山梨酯-20>油酸聚乙二醇甘油酯>月桂酸聚乙二醇甘油酯>肉豆蔻酸异丙脂>聚甘油脂肪酸酯>乙醇>1-甲基-2-吡咯烷酮>水,不同用量氮酮对马钱子碱的促渗作用强弱为10%>7.5%>5%>3%>4%>2%>1%>0.5%。结论:马钱子碱具有抗炎镇痛作用,加入3%氮酮的马钱子囊泡凝胶体外透皮效果较好。
文摘目的:制备并表征局部用咪喹莫特泡囊凝胶剂,考察药物皮内滞留效应。方法:制备并表征咪喹莫特泡囊凝胶剂,离体鼠皮透皮实验考察药物皮内滞留量和透过量,切片观察药物皮内分布。结果:泡囊的平均粒径197.2 nm,Zeta电位-42.97 m V,包封率27.44%;泡囊凝胶剂体外释放t1/2与泡囊相似,但为凝胶剂的4.94倍和市售乳膏的3.83倍,12 h透过药量均比凝胶剂和市售乳膏小一半,单位面积皮内药物滞留量约为它们的2倍,切片显示药库效应显著。结论:泡囊凝胶剂具缓释作用和药库效应,可增加皮内滞留,减少角质层拦截和透过皮肤的药量,将有利于皮肤病的治疗,并可降低局部刺激性和全身毒性的风险。
基金National Science and Technology Major Projects for"Major New Drugs Innovation and Development"(Grant No.2017ZX09301016)
文摘Brucine has anti-inflammatory and analgesic effects and is the main active compound of the seeds of Strychnos nux-vomica L. To study brucine niosomal gels, a reliable and rapid LC-MS/MS method was established to quantify brucine levels in rats. Tissue distribution and pharmacokinetics of brucine were investigated after topical and oral application of brucine niosomal gels to rats. The plasma concentration versus time profiles suggested that systemic exposure of brucine for oral administration of brucine niosomal gels was higher than that for topical administration, and topical administration showed a relatively sustained release. There was a considerable amount of brucine distributed in the knee joint. These results provided a strong basis for the follow-up study of this preparation.
