Objective: To study the preparation of 20(S)-protopanaxadiol-phospholipid (20(S)-PPD) complex HAP assemblies.
Methods: 20(S)-PPD phospholipid complex was assembled with the drug carriers of HAP. Effects of technological factors on the assembled amount were investigated, including HAP species, phospholipid complex concentration, ratio of HAP and assembled liquid, and then the preparation technology of 20(S)-PPD phospholipid complex HAP assemblies was determined.
Results: The average quality of phospholipid complex assembled was 136. 26 mg/g,the average assembled rate was 5.3% for 20(S)-PPD phospholipid complex HAP assemblies prepared by the determined assembly process. FT-IR showed that 20(S)-PPD phospholipid complex was absorbed in the HAP assemblies, and the hydrogen-bonding effect was the main mechanism of HAP assemblies to assemble and adsorb phospholipid complex. The cumulative release rate in pH 7.4 phosphate buffer of the HAP assemblies indicated that the assemblies had the effect of sustained release.
Conclusion: The phospholipid complex HAP assembles have the advantages of simple preparation process, and sustaining release effect, which can provide preliminary research foundation for research and development of 20(S)-PPD sustained-release preparations.