Study on the preparation of hyperoside mixed nanomicelles and its intestinal absorption / 中国药房

ABSTRACT

OBJECTIVE To prepare hyperoside mixed nanomicelles （Hyp-F127/TPGS） and optimize its preparation technology，and to investigate its intestinal absorption characteristics. METHODS Hyp-F127/TPGS was prepared by thin film dispersion method. Based on single factor test and Plackett-Burman design ，combined with Box-Behnken response surface method ， the preparation process was optimized and validated using entrapped efficiency （EE）and drug loading （DL）as evaluation indexes ， F127-TPGS mass ratio ，hydration time and the amount of Hyp as factors. The appearance and microscopic morphology of Hyp-F127/TPGS obtained by the optimal technology were observed ，and the particle size ，polydispersity index （PDI）and Zeta potential were also determined. The critical micelle concentration （CMC）of blank micelle （F127/TPGS），in vitro release behavior and preliminary stability of Hyp-F 127/TPGS were investigated ，and absorption characteristics of Hyp-F 127/TPGS were investigated by in situ unidirectional intestinal perfusion model. RESULTS The optimal preparation technology of Hyp-F 127/TPGS included F127-TPGS mass ratio of 2∶1，hydration time of 2 h，and Hyp amount of 9 mg. Results of three validation tests showed that the EE of Hyp-F 127/TPGS was （87.20±0.99）％，and the DL was （5.02±1.20）％，deviations from predicted values were 0.92％ and 2.39％. The micelles prepared by optimal technology were yellow ，clear and transparent solution ，with good Tyndall effect ；under transmission electron microscope ，they were spherical ，complete and evenly distributed ；the particle size was （15.02±0.16）nm， the PDI was 0.092±0.031，and the Zeta potential was （－6.67±1.47）mV. The CMC of F 127/TPGS was 21 μg/mL，Hyp-F127/ TPGS was stable after 4 weeks of storage at 4 ℃，and the cumulative release rates of Hyp-F 127/TPGS and Hyp control were （66.30±2.93）％（96 h）and（99.24±0.27）％（60 h），respectively. Hyp-F 127/TPGS and Hyp reference were absorbed in each intestinal segment ，and the main absorption sites were jejunum and duodenum respectively ；drug absorption rate constant andapparent absorption coefficient of the former were significantly higher than those of the latter （P＜0.05 or P＜0.01）. E-mail：zhangyuhangxz@163.com CONCLUSIONS The optimized preparation technology of Hyp-F127/TPGS is stable and feasible ；prepared Hyp-F 127/ TPGS shows a sustained -release effect ，which promotes the intestinal absorption of H yp to a certain extent.