摘要
目的：为提高卡铂的疗效，降低毒副作用，制备了该药的明胶微球。方法：用乳化法制备卡铂明胶微球，紫外分光光度法测定药物的含量，二阶导数法测定体外释药情况；用静脉注射肿瘤细胞建立了肺肿瘤模型，计算瘤结节数来考察疗效。结果：卡铂明胶微球平均粒径为１３－２０ μｍ ，粒径范围５－０～２８－６ μｍ 的微球数占总数的９１－８％ 。微球平均载药量为２３－７６ ％ （ｎ＝ ３） 。冰箱、室温和３７℃，ＲＨ７５ ％ 考察３ 个月，几乎无变化，体外释药符合一级动力学规律，释药Ｔ１／２ 比原药延长约１０ 倍。药效学实验表明，卡铂明胶微球对小鼠肺部Ｓ１８０ 肿瘤生长有明显的抑制作用，抑瘤作用较原药卡铂大大提高。结论：卡铂明胶微球在体内有良好的肺靶向性，对提高药物的疗效。
AIM: To improve the treatmemt efficacy and reduce the side effect of carboplatin (CBP), the antitumor drug was incorporated into gelatin microspheres (GMS). METHODS: Lung targeting gelatin microspheres of CBP (CBP GMS) were prepared by the method of emulsion. The ultraviolet absorption spectrophotometric method was used for the determination of CBP. The method of dynamic dialysis was used in in vitro release of CBP from CBP GMS. S180 lung neoplasm models were established by iv cancer cell. The number of pulmonary nodules was examined for evaluating the treatment efficacy. RESULTS: The data showed that the mean diameter of CBP GMS was 13 20 μm, with 91 8% of the microspheres ranging from 5 0 μm to 28 6 μm. The average content of CBP in CBP GMS was 23 76% and the CBP GMS were stable for three months stored at 37℃ (relative humidity 75%). The release profile in vitro could be described by first order kinetic equation. The results of therapeutic trials showed that the antitumor effects were significantly increased by injection of CBP GMS compared with injection of CBP solution in the treatment of mice with lung carcinoma. CONCLUSION: The results indicated that CBP GMS have a good targeting efficiency in vivo , and the biodegradable CBP GMS may decrease the side effects of carboplatin and improve its treatment efficacy.
出处
《药学学报》
CAS
CSCD
北大核心
1999年第10期786-789,共4页
Acta Pharmaceutica Sinica
基金
国家自然科学基金
关键词
卡铂
明胶微球
抗癌药
肺靶向给药系统
carboplatin
gelatin microspheres
anticancer agent
lung targeting drug delivery system
