Anti-wrinkle and Skin turnover Improvement Effects of Niacinamide-dipeptide Convergence

Purpose: This study aims to understand the role Angelica gigas (A. gigas) Nakai root extract (AGNRE) fermented with Jeju lava seawater in collagenase suppression in human dermal fibroblasts, and identify the major active compound responsible for it suppressive effect. Methods: AGNREs were prepared by fermentation with Jeju lava water at low temperature and analyzed for identifying the major active compound in these fermented root extracts using high-performance liquid chromatography (HPLC). Water-soluble tetrazolium salt (WST-1) assay and real-time polymerase chain reaction (qRT-PCR) were performed to investigate the cell viability and expression level of collagenase gene. Comparative experiments were performed using AGNREs and decursin to confirm the downregulation of collagenase expression and analyze the correlation between them. Results: HPLC analysis revealed decursin to be the major active compound in AGNREs. Analysis of data obtained by WST-1 assays at concentration of 200 μg/mL for AGNREs and <20 μM for decursin did not show any cytotoxicity in human dermal fibroblasts. qRT-PCR analysis revealed that AGNREs as well as decursin downregulated the expression of matrix metalloproteinases-3 (MMP3) gene in human dermal fibroblasts. Conclusion: These analyses suggest that AGNREs fermented with Jeju lava water as well as decursin isolated from these extracts hold a great potential to be applied as functional anti-wrinkle agent in cosmetic.

unclassified

Suppression of Matrix Metallopeptidase-3 Expression in Human Dermal Fibroblasts by Decursin from Angelica gigas Nakai Root Extracts Fermented with Jeju Lava Seawater

Kang¹,

Nam²,

Yoon³

et al. 2021

Control Effect of Palmitoyl Teterapeptide-7 Gel to Inflammatory Responses Elicited by PM10

Kim¹,

Kim²,

Kim³

et al. 2021

Purpose: As a cosmetic approach to prevent pollution-induced skin damage, the topical application of skincare products, infused with functional ingredients, can offer an optimal solution to skin problems. The study aims to assess the anti-inflammatory effect of PT-7 gel. Methods: This study prepared antipollution cosmetics using palmitoyl tetrapeptide-7 (PT-7; 3% PT-7 gel, 5% PT-7 gel) and performed safety testing. For the safety assessment, the human repeat insult patch test (HRIPT) was performed to detect erythema occurrence on the patch area, following the ICDRG criteria. The panels comprised of 30 adults, aged 20-50 years. Furthermore, this study also analyzed particulate matter (PM) 10-induced inflammation on the skin of a hairless mouse by immunohistochemistry and Western blot. Results: The cosmetic safety testing results showed no skin reactions to antipollution gels containing PT-7. Immunohistochemistry and the Western blot analysis demonstrated reduced levels of IL-1β and IL-6 expression levels in the 3% PT-7 and 5% PT-7 application groups after PM10 treatment. In particular, after PM10 treatment, the IL-1β and IL-6 expression levels were statistically significantly decreased in the group treated with 5% PT-7. Conclusions: Collectedly, this study provided evidence of the PT-7 gel's safety and found that PT-7 gel reduced the IL-1β and IL-6 expression levels caused by PM10 exposure. In view of these results, it supports that PT-7 is a promising antipollution cosmetic ingredient with great commercial potential.

Preparation and Evaluation of the Effect of Acetyl Hexapeptide-8 Ampoule for Scalp Treatment

Jo¹,

Lee²,

Kim³

2021

Purpose: The topical application of scalp-care cosmetics, infused with functional ingredients, can offer an optimal cosmetic approach to prevent problems associated with aging. In terms of the development of anti-aging cosmetics, we studied the use of acetyl hexapeptide-8 (AH-8) for improving elasticity of the scalp.Methods: Ampoules containing 3% and 5% concentrations of AH-8 as an active ingredient were prepared and their safety and efficacy were evaluated. HaCaT cells were used to evaluate the safety of AH-8 ampoules by measurement of in vitro cytotoxicity. In in vivo experiments, we tested the AH-8 ampoules by cumulative irritation test (CIT) on healthy adults, 20–50 years of age. Relative expressions of superoxide dismutase 2 (SOD2), forkhead box O1 (FOXO1), actinin alpha 1 (ACTN1), collagen type XVII alpha 1 chain (COL17A1), and integrin subunit beta 4 (ITGB4) were assessed using quantitative real-time PCR (Q-PCR).Results: AH-8 ampoules showed significant cytotoxicity to HaCaT cells in a dose-dependent manner. CIT assessment in 30 adults revealed no skin reactions to both 3% and 5% AH-8 ampoules. After treatment of HaCaT cells with the AH-8 ampoules, mRNA levels of SOD2 and FOXO1, which are directly implicated as antioxidant factors, were increased. Of the factors that improve elasticity, ACTN1 mRNA levels had the greatest increase when treated with the 5% AH-8 ampoules (1.75 µg/mL). Also, the AH-8 ampoules increased mRNA levels of COL17A1, and ITGB4 in HaCaT cells.Conclusions: In this study, we proved that 3% and 5% AH-8 ampoules are safe for use as a scalp-care cosmetic. AH-8 ampoule had efficacy in anti-aging and improving elasticity of the scalp. This comprehensive test showed that AH-8 can be developed as a cosmetic for anti-aging and improvement of scalp elasticity.