One of our
center papers was pubilished in the latest issue of Drug Development and
Industrial Pharmacy. Its authors are Hui Lin Wei, Shu Qi Wang, Feng Xu, Lan Fang
Xu, Jia Run Zheng, and Yun Chen. Its content was introduced as
follows.
The aim
was to evaluate the bioequivalence of topically applied Acyclovir (ACV) creams
using dermal microdialysis (DMD) in a pig model. Three ACV creams (3%), ACV1,
ACV2 and ACV3, were topically administrated on the dorsum of pigs, and the DMD
sampling technique was used to continuously collect microdialysate. The
concentration of ACV in microdialysate was measured by HPLC and the
concentration-time profiles were used to calculate pharmacokinetic parameters.
The results showed that 90% confidence interval (CI) of the ratio of AUC0–4 h of
ACV2 and ACV3 was between 88.2 and 105.7%, which was within the acceptance range
(80–125%). Ninety percent CI of the ratio of Cmax of ACV2 and ACV3 was between
87.4 and 124.4%, which was within the acceptance range (80–125%). These data
indicate that ACV2 and ACV3 used in this study were bioequivalent. This study
demonstrates that the pig model coupled with DMD sampling can potentially
provide a cost-effective strategy to evaluate topical drug delivery and its
associated pharmacokinetic studies.