GERg3 had antiphotoaging effects in UV- or IR-exposed human dermal fibroblasts and normal human 3D skin model.

A novel actinobacterial strain, designated EPI-7, was isolated on R2A agar from human skin (keratinocytes) and subjected to a taxonomic study using a polyphasic approach. Strain EPI-7 showed a Gram-positive reaction, was non-motile, non-spore-forming, and cells had a rod-shape. Colonies were round, convex and pale yellow. Phylogenetic analysis based on 16S rRNA gene sequences showed that the novel isolate formed a cluster with several uncultured bacterial clones and with cultured members of the genera Modestobacter and Sporichthya. The 16S rRNA gene sequence similarities with respect to the type strains of recognized species from the above genera and other phylogenetic neighbours ranged from 92.6 to 93.4 %. The G+C content of the genomic DNA was 68.9 mol%. The only isoprenoid quinone was MK-9(H4), and the major fatty acids detected were C17 : 1ω8c, C16 : 0, iso-C15 : 0 and summed feature 3. The major polar lipids were found to be phosphatidylethanolamine, phosphatidylinositol, three unidentified phospholipids, phosphatidylglycerol, phosphatidylcholine, two unidentified amino lipids and three unidentified lipids. The cell-wall peptidoglycan contained meso-diaminopimelic acid, glutamic acid and alanine. Whole-cell sugars present included rhamnose, glucose and galactose. The combination of the genotypic and phenotypic data allowed differentiation of strain EPI-7 from its closest phylogenetic neighbours and provided evidence that strain EPI-7 represents a novel genus and species in the family Sporichthyaceae. The name Epidermidibacterium keratini gen. nov., sp. nov. is proposed with the type strain being EPI-7 (=KCCM 90264=JCM 31644).

The results suggest that P/M or T/M can inhibit decrease of collagens by blocking IR-induced heat transmission in human dermal fibroblasts.

Lipopolysaccharide (LPS)-induced inflammatory responses in the HaCaT keratinocyte cell line produce proinflammatory cytokines, such as interleukin-1α(IL-1α), tumor neurosis factor-α (TNF-α), interleukin-6 (IL-6), and interleukin-8 (IL-8) and also increase the expression of inducible nitric oxide synthase (iNOS), cyclooxygenase-2 (COX-2), and prostaglandins E2 (PGE2). In this study, we developed new natural ingredients for cosmetics that inhibit the pro-inflammatory responses induced by LPS in HaCaT cells. The mixture of Sorbus commixta (SC), Urtica dioica (UD), Phyllostachys nigra (PN), and Rhus semialata gall (RS) extracts blocked the increase of TNF-α IL-1α IL-6, and IL-8. The increase of COX-2, iNOS, and PGE2 were also blocked by it. Finally, the mixture inhibited skin irritation induced by sodium lauryl sulfate (SLS), when applied on skin through IQ chamber Ⓡ . In conclusion, these results show that the mixture of SC, UD, PN, and RS can be used as a primary ingredient to alleviate skin irritation when cosmeceutical products are developed for sensitive skin.

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