2022 Fiscal Year Final Research Report
Transdermal delivery of polyphenol using microemulsions containing deep eutectic solvents and their skin permeation mechanism
Project/Area Number |
19K15367
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Research Category |
Grant-in-Aid for Early-Career Scientists
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Allocation Type | Multi-year Fund |
Review Section |
Basic Section 27040:Biofunction and bioprocess engineering-related
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Research Institution | Sojo University |
Principal Investigator |
Sakuragi Mina (水谷美菜) 崇城大学, 工学部, 准教授 (90646829)
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Project Period (FY) |
2019-04-01 – 2023-03-31
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Keywords | 深共融溶媒 / マイクロエマルション / ポリフェノール / 角層 / 放射光X線散乱 / 経皮デリバリー |
Outline of Final Research Achievements |
Microemulsions (MEs) are commonly used as a carrier to enhance the skin permeability of drugs. However, the relationship between the structural properties and skin permeabilities is still unknown. We investigated the effects of the structural properties of MEs containing deep eutectic solvent (DES) on the skin permeabilities. The results showed that the cylindrical ME could improve the skin penetration amount of a drug compared to that of spherical ME because a drug was more contained in cylinder ME. Next, we investigated the impact of stratum corneum (SC) water content on the skin penetration mechanism of ME. We found that the inner water of MEs was released to the SC when applying MEs to the dry SC, resulting in an increase in the repeat distance of SC lamellar. Conversely, when MEs are applied to hydrated SC, the MEs absorb the water from the SC into their inner phases, causing a decrease in the repeat distance of SC lamellar.
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Free Research Field |
超分子化学
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Academic Significance and Societal Importance of the Research Achievements |
本研究では、これまで形が一般的でなく議論されていなかった球状以外のMEを、イオン液体の一種の深共融溶媒を用いて調製し、MEの構造と薬剤内包量、皮膚浸透性との関連性を明らかにした。また、これまでME の構成成分やMEに内包された有効成分が皮膚のどの層まで浸透しているか、顕微鏡を用いた皮膚断面の観察によるメカニズムの検討は行われているが、分子レベルでの作用機構がわかっていなかった。本研究にて、皮膚バリアの角層を透過する過程で生じる、MEや皮膚バリアのラメラ層の経時的な構造変化をリアルタイムで観察した。本研究成果は、今後の経皮デリバリーの分野の発展に大きく貢献できるものと期待している。
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