Structure-based virtual screening of natural compounds in preventing skin senescence: The role of epigallocatechin gallate in protein kinase C alpha-specific inhibition against UV-induced photoaging.

This study combines high-throughput screening and virtual molecular docking to identify natural compounds targeting PKC in skin aging. Go 6983, a PKC inhibitor, showed potent suppression of MMP-1 transcription. EGCG was one of the candidates that showed it could significantly lower UVB-induced MMP-1 expression in HaCaT cells, and it had a strong affinity for PKCα.

Activation of mixed lineage kinase 3 by fine particulate matter induces skin inflammation in human keratinocytes.

Fine particulate matter (PM) induces a range of diseases, including skin disorders, through inflammatory responses. In this study, we investigated the novel mechanisms by which PM causes skin inflammation in human keratinocytes HaCaT. We observed increased protein expression of cyclooxygenase-2 (COX-2) and the production of prostaglandin E2 (PGE2) in PM-treated HaCaT cells.

Giant , a novel cultivar rich in madecassoside and asiaticoside, suppresses α‑melanocyte‑stimulating hormone‑induced melanogenesis through MC1R binding.

The present study investigated the anti‑melanogenesis effects of Giant (GCA), a new cultivator of (CA) cataloged by the Korea Forest Service in 2022, and compared its efficacy with that of traditional CA. GCA has a high yield per unit area and enhanced antioxidant properties. The anti‑melanogenic effects of GCA were investigated using B16F10 melanoma cells and a 3D human skin‑equivalent model.

Skin-whitening effects of by suppressing MITF translocation.

is a plant that grows in salty regions along the coastline and exerts radical-scavenging and anti-inflammatory effects. In this study, we investigated the skin-whitening effects of extract (SME) in B16F10 melanoma cells. SME was found to exert radical-scavenging effects.

Oral administration of collagen peptide in SKH-1 mice suppress UVB-induced wrinkle and dehydration through MAPK and MAPKK signaling pathways, in vitro and in vivo evidence.

Unlabelled: Skin aging is induced by exposure to extrinsic factors, causing various diseases and adversely affecting aesthetics. Studies have suggested that as the quality of life improves, demand for beauty and nutritional cosmetics increases. Here, the protective effects of collagen peptide against UV-induced skin damage were evaluated in vitro and in vivo.

Inhibition of Photoaging by Anthocyanin Metabolites Derived from Rose Petal Extract.

Scope: Rose petal extract (RPE) shows a significant antioxidant effect through its anthocyanin content. However, the mechanism underlying the anti-aging effects of orally administered RPE remains unclear. This study aims to describe the anti-aging effect and mechanism of action of orally administered RPE in ultraviolet (UV)B-induced skin aging.

Porcine Placenta Peptide Inhibits UVB-Induced Skin Wrinkle Formation and Dehydration: Insights into MAPK Signaling Pathways from In Vitro and In Vivo Studies.

Excessive exposure to ultraviolet (UV) radiation from sunlight accelerates skin aging, leading to various clinical manifestations such as wrinkles, dryness, and loss of elasticity. This study investigated the protective effects of porcine placenta peptide (PPP) against UVB-induced skin photoaging. Female hairless SKH-1 mice were orally administered PPP for 12 weeks, followed by UVB irradiation.

Extract Exhibits Antiwrinkle Activity by Suppressing ErbB2 Phosphorylation.

(UE), an edible lichen, is widespread in northeast Asian countries, including China, Japan, and Korea. In the present study, we examined the antiwrinkle activity of UE. We observed that the UE extract (UEE) suppressed ultraviolet (UV)-induced matrix metalloprotein-1 (MMP-1) expression and reactive oxygen species (ROS) generation in a human keratinocyte cell line (HaCaT) and human skin tissue.