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  • 标题:Effect of Rubbing on the Distribution of Topically Applied Drugs into the Hair Follicles
  • 本地全文:下载
  • 作者:Akinari Abe ; Hiromichi Suzuki ; Miyuki Saito
  • 期刊名称:Chemical and Pharmaceutical Bulletin
  • 印刷版ISSN:0009-2363
  • 电子版ISSN:1347-5223
  • 出版年度:2020
  • 卷号:68
  • 期号:9
  • 页码:832-836
  • DOI:10.1248/cpb.c20-00061
  • 出版社:The Pharmaceutical Society of Japan
  • 摘要:Rubbing actions are often conducted to apply topical formulations onto the skin.Although rubbing was found to increase the skin permeation of drugs, few reports have revealed whether rubbing enhanced either drug permeation through the stratum corneum (SC) or hair follicles (HFs) pathways, or through both.In the present study, we investigated the effects of rubbing on caffeine (CAF) distribution in the SC and HFs.The effect of rubbing direction on the skin penetration of CAF was also investigated.The skin concentration of CAF and its cumulative permeation amount were increased clearly by rubbing.More than six times higher CAF concentrations in the viable epidermis and dermis were observed 5 min after rubbing application compared with no rubbing.On the other hand, slightly increased CAF concentrations were observed in the SC, suggesting that CAF was delivered through the HF pathway by rubbing.Rubbing against the natural hair direction provided the highest skin permeation as well as skin concentrations.Changes in the morphology of the HF opening area might be related to the enhancement effect.These results may provide useful information to understand the effect of rubbing on the skin permeation of applied drugs.
  • 关键词:rubbing application;hair follicle targeting;skin permeation;drug disposition
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