[Study on in vitro mucosal permeation properties and factors affecting mucosal permeability of paeonol].

Objective: To study the in vitro mucosal permeation properties of paeonol and the factors that affect such permeability.
Method: Bullfrog skin was selected as the permeation model, and the modified Franz diffusion cell was adopted to investigate the percutaneous adsorption in vitro. Content of paeonol was quantified by HPLC. Kinds of receiving solution, parts of bullfrog skin and impacts of drug concentration on percutaneous adsorption in vitro were systematically studied.
Result: Percutaneous permeation of paeonol was to some extent affected by osmotic pressure and pH value of the receiving solution. Abdominal skin, lateral abdominal skin and dorsal skin, with the permeability coefficient form high to low, had great influence on the permeation of paeonol. There existed a good percutaneous permeation of paeonol. And the relationship between the cumulative permeability rate and time was coincided with the first order kenetical process.
Conclusion: Take the in vitro abdominal skin of bullfrog as the permeation model, some similarities are revealed between in vitro percutaneous permeation of paeonol and mucosal adsorption.