Résumé
Objective To prepare liposomes of glycyrrhizic acid, and evaluate its liver targeting property in mice. Methods The liposomes were prepared with conventional rotary-evaporated film-ultrasonication method.The liposomes were injected into the mouse tail vein, and the concentration of glycyrrhizic acid was detected by RP-HPLC.The glycyrrhiz-ic acid injection was taken as control.The targeted indicators, including the relative tissue exposure ( re ) , targeting effi-ciency (te), and index of peak concentration ratio (Ce), were used to evaluate the liver targeting property.Results The re was 1.4, Te of the liposomes was 0.092, and te of the injection was 0.059.The Ce of the liver was 1.59, and the Ce of the blood was 0.99.Conclusion Compared with glycyrrhizic acid injection, the glycyrrhizic acid liposomes show good liv-er-targeting property.
Résumé
OBJECTIVE:To establish an RP-HPLC method for the content determination of glycyrrhizic acid in gly-cyrrhizin liposome.METHODS:The separation was performed on Shim-pack VP-ODS column with methanol-buffer phosphate(pH=2.6,68∶32)as the mobile phase,the detection wavelength was254nm and the flow rate was1ml/min.RE-SULTS:Glycyrrhizic acid was well-separated with peaks of the adjuvants and the solvent.The linear range for glycyrrhizic acid was1～100?g/ml(r=0.9999,n=5).The average recovery was97.56%(RSD=1.03%).CONCLUSION:This method is accurate and sensitive,and suitable for the content determination of glycyrrhizic acid in glycyrrhizin liposome.