南京市卫生局科技发展专项基金资助项目(ZKX0103)
目的:制备新型天冬氨酸-谷氨酸共聚物-甲硝唑(poly aspartic acid-co-glutamic acid-metronidazole,PAG-MTI)纳米粒子。方法:应用化学法合成PAG-MTI纳米粒子;通过红外光谱仪测定其化学结构、透射电镜及激光粒度分析仪分析微观形貌和粒径、紫外分光光度法测定载药量、透析法进行体外释放试验,对其化学结构和物理性质进行了系列表征。结果:合成的PAG-MTI纳米粒为球形,粒径198.9 nm,载药量12%,体外释放试验表明PAG-MTI的释药速率明显延缓,释放1 h与24 h,累积释放百分比分别为12.19%和47.51%。结论:化学合成法制备的新型PAG-MTI具有较好的缓释作用,有望通过进一步优化改进以用于临床滴虫性生殖道炎症的治疗。
Objective:To prepare and identify poly aspartic acid-co-glutamic acid-metronidazole(PAG-MTI) nanoparticles.Methods:Metronidazole was conjugated into polymers. The structure, morphology and particle size of PAG-MTI were characterized by infrared spectrophotometry, ultraviolet spectrophotometry, transmission electron microscope and laser diffraction-based particle size analyzer. Metronidazole release behavior from these polymers was also determined in vitro. Results:PAG-MTI nanoparticles were spherical in morphology; drug loadings were 12%, and average size of nanoparticles was198.9 nm. The release of metronidazole in PAG-MTI was sustained obviously. The accumulation rate of metronidazole was 12.19% at 1 h, and 47.51% at 24 h after released. Conclusion:PAG-MTI nanoparticles by chemosynthesis can delay metronidazole release in vitro. It may be considered as a promising approach in the treatment of T.vaginalis.
陈汐敏,戚晓红,段 磊,朱利群,冯振卿,陈 强,吴 军.天冬氨酸-谷氨酸共聚物-甲硝唑纳米粒子的制备表征[J].南京医科大学学报(自然科学版),2007,(6):569-572