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Balancing act: optimizing blue light for melanogenesis while minimizing cellular damage in primary human skin cells.
Front Physiol
January 2025
Regenerative Medicine Division, CHU de Quebec - Université Laval Research Centre, Quebec City, QC, Canada.
Introduction: Recent findings show that visible light, particularly blue light, stimulates melanogenesis in human skin, though the underlying mechanisms remain debated. This study aimed to determine the cell damage threshold of non-ionizing blue light on keratinocytes while preserving their ability to stimulate melanogenesis.
Methods: Human keratinocytes (N = 3) and melanocytes (N = 3) were isolated from skin samples of varying Fitzpatrick skin phototypes and irradiated with blue light (λpeak = 457 nm) and UVA light (λpeak = 385 nm).
The secretion of TGF-β3 by adipose-derived stem cells inhibits melanin synthesis and its impact on the cAMP/PKA signaling pathway.
Arch Dermatol Res
January 2025
Burn and Wound Repair Center, The Third Hospital of Hebei Medical University, No. 139, Ziqiang Road, Shijiazhuang, Hebei Province, 050035, China.
This study aimed to investigate the role of transforming growth factor-beta 3 (TGF-β3) secreted by adipose-derived stem cells (ADSCs) in suppressing melanin synthesis during the wound healing process, particularly in burn injuries, and to explore the underlying mechanisms involving the cAMP/PKA signaling pathway. ADSCs were isolated from C57BL/6 mice and characterized using flow cytometry and differentiation assays. A burn injury model was established in mice, followed by UVB irradiation to induce hyperpigmentation.
View Article and Find Full Text PDFPharmacological function of melanocortin-3 receptor in goldfish (Carassius auratus).
Gen Comp Endocrinol
January 2025
College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi 712100, China. Electronic address:
The melanocortin-3 receptor (MC3R) was recognized for its critical role in energy metabolism and inflammatory responses in mammals; however, its functions in fish remain poorly understood. This study characterized the mc3r gene in goldfish, investigating its sequence, tissue distribution, and pharmacological responses. The coding sequence of goldfish mc3r was 975 bp, translating to a 325-amino-acid protein typical of G protein-coupled receptors, with notable conservation across cyprinids.
View Article and Find Full Text PDFWater Extract Inhibits Melanin Synthesis and Promotes Wound Healing.
Life (Basel)
November 2024
MAC Gifu Research Institute, MicroAlgae Corporation, 4-15 Akebono-cho, Gifu 500-8148, Japan.
This study investigated the multifaceted benefits of water extract across various cell lines, including murine B16F1 melanoma cells, human keratinocyte HaCaT cells, and human follicle dermal papilla cells (HFDPCs), to assess its potential in skin health improvement. Initially, the antioxidant capacity of the extract was evaluated using the ABTS assay, revealing significant radical scavenging activity, indicating strong antioxidative properties. Subsequently, extract showed notable inhibition of α-MSH-enhanced melanin production in B16F1 cells without cell toxicity by suppressing tyrosinase expression.
View Article and Find Full Text PDFExtracts Exert Anti-Melanogenic Properties via the CREB/MAPK Pathway in B16F10 Cells.
Mar Drugs
November 2024
Research Institute of Basic Sciences, Incheon National University, Incheon 22012, Republic of Korea.
, a salt-tolerant plant, has demonstrated antioxidant effects, the ability to prevent prostate enlargement, antifungal properties, and skin moisturizing benefits. This study aimed to explore the anti-melanogenic potential of the 70% ethanol extract of (TME) along with its ethyl acetate (TME-EA) and water (TME-A) fractions. TME (10-200 µg/mL), TME-EA (1-15 µg/mL), and TME-A (100-1000 µg/mL) were prepared and applied to B16F10 cells with or without α-MSH for 72 h.
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