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Current Drug Delivery


ISSN (Print): 1567-2018
ISSN (Online): 1875-5704

Research Article

A Compound Essential Oil Alters Stratum Corneum Structure, Potentially Promoting the Transdermal Permeation of Hydrophobic and Hydrophilic Ingredients

Author(s): Na Yang, Xinyi Ai, Kang Cheng, Yihan Wu, Zhi Lu, Zhenda Liu, Teng Guo* and Nianping Feng*

Volume 21, Issue 5, 2024

Published on: 02 February, 2023

Page: [744 - 752] Pages: 9

DOI: 10.2174/1567201820666230120122206

Price: $65


Background: The stratum corneum (SC) is the main barrier of the skin, and cosmeceuticals are different from ordinary cosmetics in that they need to deliver active ingredients targeting specific skin problems through the SC into the deeper layers of the skin. Thus, we designed a compound essential oil (CEO) extracted from Salvia miltiorrhiza Bge and Cinnamomum cassia Presl, supplemented with borneol to deliver active ingredients through the SC.

Methods: The CEO was prepared by flash extraction combined with the microwave method. Moreover, the main components of the CEO were determined using gas chromatography-mass spectrometry (GCMS). Visualization techniques, such as scanning electron microscopy (SEM), haematoxylin-eosin (HE) staining, and confocal laser scanning microscopy (CLSM), were used to study the permeationpromoting mechanism of the CEO on the skin. Furthermore, the permeation-promoting effects of the CEO on both hydrophobic and hydrophilic ingredients were tested via in vitro skin penetration experiments and in vivo microdialysis experiments.

Results: The results indicated the ability of the CEO to alter the structure of the SC, leading to enhanced transdermal permeation of hydrophobic and hydrophilic ingredients. The 1.5% CEO group demonstrated the best permeation-promoting effect compared to the other CEO groups and blank groups (P<0.05). Furthermore, the CEO displayed an expedited permeability-promoting effect on hydrophobic ingredients compared to hydrophilic ingredients.

Conclusion: It is concluded that the prepared CEO can promote the transdermal permeation of hydrophobic and hydrophilic ingredients. This study will provide a reference for the application of the prepared CEO in the development of cosmeceuticals with natural efficacy.

Keywords: Stratum corneum, compound essential oil, transdermal, permeation enhancer, hydrophobic, hydrophilic.

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