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http://dx.doi.org/10.15230/SCSK.2021.47.2.179

A Study on the Design of Stearic Acid-Based Solid Lipid Nanoparticles for the Improvement of Artificial Skin Tissue Transmittance of Serine  

Yeo, Sooho (College of Pharmacy, Chung-Ang University)
Publication Information
Journal of the Society of Cosmetic Scientists of Korea / v.47, no.2, 2021 , pp. 179-184 More about this Journal
Abstract
Stratum corneum known as a skin barrier, which maintains water in skin, is the outer layer of the skin. Natural moisturizing factors (NMF) are one of the constituents in stratum corneum and amino acids are the highest components among NMF. In this study, we designed stearic acid-based solid lipid nanoparticles (SLNs) for improved skin penetration of serine (Ser). Ser-capsulated SLN was manufactured by double-melting emulsification method. The mean particle size and zeta potential of SLNs were 256.30 ~ 416.93 nm and -17.60 ~ -35.27 mV, respectively. The higher the degree of hydrophobicity or hydrophilicity of emulsifiers, the smaller the particle size and the higher the stability and capsulation rate. In addition, skin penetration was conducted using SkinEthicTM RHE which is one of the reconstructed human epidermis models. The results of Ser penetration demonstrated that all SLNs enhanced than serine solution. The amount of enhanced Ser penetration from SLNs were approximately 4.1 ~ 6.2 times higher than that from Ser solution. Therefore, Ser-loaded SLN might be a promising drug delivery system for moisturizing formulation in cosmeceutical.
Keywords
serine; solid lipid nanoparticles; natural moisturizing factors; penetration; SkinEthic $RHE^{TM}$;
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