灯盏花素缓释微丸制备工艺与处方优化的研究

目的 考察灯盏花素缓释微丸的制备工艺和最优处方，并对释药机制进行探讨。方法 利用挤出滚圆法制备骨架型微丸，采用单因素考察和正交设计筛选最优处方，通过方程拟合探讨释药机制。结果 所得微丸的制备工艺简单，微丸大小均匀，载药量大且药物含量均匀，能达到缓释12h的试验设计要求；释药机制以药物扩散为主，兼有骨架溶蚀。结论 利用挤出滚圆法制备灯盏花素缓释微丸方法简单，适于工业化生产。

Preparation and formulation optimization of Breviscapin Sustained-release Pellets

Object To investigate the preparation technique and optimal formulation of Breviscapin Sustained release Pellets (BSP) and the release mechanism of breviscapin from the pellets. Methods BSP was prepared by extrusion spheronization method. Based on the studies of influential factors, optimal formulation modified to release drug over 12 h was obtained by the orthogonal design. And release mechanism of breviscapin from BSP was established by equation fitting. Results Prepared BSP has such advantages as simple technique, uniformity in diameters and high loading with even contents. They can release drug for 12 h. And the release of breviscapin could be mainly controlled by diffusion associated with slight erosion. Conclusion Extrusion spheronization method is simple for the preparation of BSP, and useful for the large scale prodution.