Improvement of solubility of epimedium flavonoid secondary glycoside components by traditional Chinese medicine polysaccharides and its mechanism / 中国中药杂志

The poor solubility of insoluble components of traditional Chinese medicine(TCM) is an important factor restricting the development of its preparations. Natural polysaccharides of TCM can be used as functional components to increase the solubility of insoluble components. Epimedium flavonoid secondary glycoside components(EFSGC) have been shown to have positive effects on the prevention and treatment of osteoporosis, but they exhibit poor solubility. Therefore, the strategy of solubilizing EFSGC with TCM polysaccharides was adopted, and its effect on the permeability and stability of EFSGC was evaluated in this study. Based on the equilibrium solubility experiment of EFSGC, it was found that Panax notoginseng crude polysaccharide(PNCP) had the best solubilization effect on EFSGC among the ten kinds of TCM polysaccharides, which increased the solubility of EFSGC from 0.8 mg·mL~(-1) to 13.3 mg·mL~(-1). It should be noted that after the solubilization of EFSGC by preparation technology, the effects on permeability and stability should be considered. Therefore, this study also investigated these two properties. The results showed that PNCP increased the effective transmittance of EFSGC from 50.5% to 71.1%, which could increase the permeability of EFSGC significantly. At the same time, it could improve the stability of EFSGC in the simulated gastric juice environment. In order to explain the solubilization mechanism of PNCP on EGSGC, critical micelle concentration, particle size, potential, differential scanning calorimetry, and infrared spectroscopy were analyzed. It was preliminarily inferred that the mechanism was as follows: PNCP and EFSGC could self-assemble into aggregates for solubilization by intermolecular hydrogen bonding interaction in water. In summary, PNCP can not only improve the solubility of EFSGC but also improve its permeability and stability. This study lays the foundation for the application of TCM polysaccharides as a functional component to solubilize insoluble components.

Processing Study of Epimedium Flavonoids Self-Assembled Micelles Fried with Suet Oil on Its Bioavailability / 中国药学杂志

OBJECTIVE: To study the influence of bioavailability of Epimedium flavonoids after processing by suet oil. METHODS: Pharmacokinetics parameters of rats Epimedium flavonoids and icariin and baohuoside I was determining by the method of pharmacology effect and plasma concentration method. RESULTS: The concentration of the Epimedium flavonoids, icariin and baohuoside I in micelles groups were higher than that of the active pharmaceutical ingredient(API). ρmax were increased by 77.94%, 38.99% and 49.90%; AUC0-t increased by 95.19%, 37.76% and 43.49%; AUC0-∞ increased by 119.35%, 35.37% and 46.26% on Epimedium flavonoids, icariin and baohuoside I group. CONCLUSION: Suet oil improved the bioavailability of Epimedium flavonoids and promoted its absorption.