Effect of different penetration enhancers on the transdermal absorption of phloretin
GUAN Bo1 HUANGFU Junru2 XU Yuan1 ZHOU Xuejiao3 LIU Xueying4 WANG Qingwei1
1.Department of Pharmacy, the Second Affiliated Hospital of Air Force Medical University, Shaanxi Province, Xi′an 710038, China;
2.Product Department, Ginwa Pharmaceutical Factory, Shaanxi Province, Xi′an 710065, China;
3.Department of Pharmacy, Xi′an Chest Hospital, Shaanxi Province, Xi′an 710075, China;
4.Department of Medicinal Chemistry and Pharmaceutical Analysis, School of Pharmacy, Air Force Medical University, Shaanxi Province, Xi′an 710032, China
Abstract:Objective To investigate the effect of azone, menthol, borneol and muscone on the transdermal promotion of phloretin in order to provide basis for the research and development of external preparations of phloretin. Methods The skin of 18 male SD rats with 2-month-old as the permeation barrier, the Franz diffusion cell was used to conduct the in vitro transdermal absorption experiment. The content of phloretin was determined by HPLC, the permeation kinetic parameters were calculated, and the permeation promoting effect of different transdermal enhancers on phloretin was evaluated. HPLC method for the determination of phloretin was as followed, chromatographic column: Inertsil ODS-3 (150 mm×4.6 mm, 5 μm); mobile phase: acetonitrile water (45:55); flow rate: 1.0 mL/min; detection wavelength: 280 nm; injection volume: 20 μL; column temperature: 25℃. Results The regression equation of phloretin in the concentration range of 0.1030-51.48 μg/mL was Y = 86.45C+3.901 (r = 0.9999). RSD of intraday and intraday precision was less than 2.0%. When the concentrations of azone, menthol, borneol and muscone were 4.0%, ER was 8.825, 13.561, 6.540 and 3.466 respectively. Conclusion Azone, menthol, borneol and muscone can enhance the transdermal effect of phloretin in a concentration-dependent manner. 4.0% penetration enhancer has the best promoting effect. The better transdermal enhancer for phloretin is menthol.