单纯形网格法优化设计姜黄素-胡椒碱复方自微乳制剂处方

Optimization and characterization of curcumin-piperine dual drug loaded self-microemulsifying drug delivery system by simplex lattice design

该研究的目的在于制备姜黄素-胡椒碱复方自微乳给药系统(Cur-PIP-SMEDDS),并对其质量进行评价。该研究通过选择合适的油相、表面活性剂和助表面活性剂,以姜黄素和胡椒碱为模型药物,采用单纯形网格法优化设计Cur-PIPSMEDDS处方;以乳剂的载药量、平均粒径为评价指标,通过Design Expert 8.06软件进行试验设计和模型构建,响应面数据分析优化和验证最佳处方组成。通过观察微乳外观和微观形态并测定其粒径、电位、包封率及载药量对其进行质量评价。结果显示优化得Cur-PIP-SMEDDS最佳处方为丙二醇单辛酸酯(Capryol 90)-聚氧乙烯氢化蓖麻油(Cremophor RH40)-二乙二醇单乙基醚(Transcutol HP)(10∶60∶30),所形成的微乳外观澄清、透明,呈圆球型,粒径分布均匀,平均粒径为(15.33±0.80)nm,姜黄素和胡椒碱的载药量分别为40.90,0.97 mg·g-1,包封率分别为94.98%,90.96%。研究表明Cur-PIP-SMEDDS可以显著改善姜黄素的水溶性和稳定性,有望提高姜黄素的口服生物利用度,以期为其剂型开发提供新的思路和方法,进而促进其在临床上的应用。

The objective of the study was to prepare and evaluate the quality of curcumin-piperinedual drug loaded self-microemulsifying drug delivery system（Cur-PIP-SMEDDS）. Simplex lattice design was constructed using optimal oil phase, surfactant and cosurfactant concentration as independent variables, and the curcumin and piperine were used as model drugs to optimize Cur-PIP-SMEDDS formulation. In the present study, the drug loadings of curcumin and piperine, mean particle size of Cur-PIP-SMEDDS were made as indicators, and the experiment design, model building and response surface analysis were established using Design Expert 8.06 software to optimize and verify the composition of SMEDDS formulation. The quality of Cur-PIP-SMEDDS was evaluated by observing the appearance status, transmission electron microscope micrographs and determining particle diameter, electric potential, drug entrapment efficiency and drug loading of it. As a result, the optimal formulation of SMEDDS was CapryoL 90-Cremophor RH40-TranscutoL HP（10：60：30）. The appearance of Cur-PIP-SMEDDS remained clarified and transparent, and the microemulsion droplets appeared spherical without aggregation with uniform particle size distribution. The mean size of microemulsion droplet formed from Cur-PIP-SMEDDS was 15.33 nm, the drug loading of SMEDDS for Cur and PIP were 40.90 mg·g^-1 and 0.97 mg·g^-1, respectively, the drug entrapment efficiency were 94.98% and 90.96%, respectively. The results show that Cur-PIP-SMEDDS can increase the solubility and stability of curcumin significantly, in the expectation of enhancing the bioavailability of it. Taken together, these findings can provide the reference to a preferable choice of the Cur formulation and contribute to therapeutic application in clinical research.