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Pharmacologic Induction of Epidermal Melanin and Protection Against Sunburn in a Humanized Mouse Model
Published on: September 7, 2013
Spermidine promotes melanin production through an MITF signalling pathway
Seong-Hee Kang1, Moon-Moo Kim1
1Department of Applied Chemistry, Dong-Eui University, Busan, South Korea.
Abstract:
Melanin plays an important role in determining skin colour. Apoptosis of melanocytes and defect in melanin production cause vitiligo. Various studies have been conducted to treat the disease, but its treatment is still difficult. Therefore, this study aimed to investigate the effect of spermidine, which is known as an inhibitor of ageing-related oxidized proteins, on melanogenesis. Even though spermidine above 50 μM had no effect on antioxidant activity and DOPA oxidation, it displayed tyrosinase activity. However, spermidine at 2000 μM was cytotoxic in B16F1 cells using MTT assay. Spermidine above 125 μM decreased the amount of intracellular hydrogen peroxide in a concentration-dependent manner in DCFH-DA analysis. It was also found that spermidine above 2000 μM increased melanin synthesis in living cells. However, spermidine above 1000 μM increased melanin synthesis in a concentration-dependent manner in H2 O2 -treated B16F1 cells. Furthermore, spermidine enhanced the expression of tyrosine hydroxylase via MITF transcription factor involved in melanogenesis in H2 O2 -treated B16F1 cells. Therefore, these results suggest that spermidine could be applied as a potential stimulator of melanin synthesis for the prevention of hair greying.
Insights
Spermidine may help prevent hair greying by stimulating melanin production. This study found spermidine increases melanin synthesis and enhances key melanogenesis factors in cells, suggesting a potential therapeutic application.
Area of Science:
- Biochemistry
- Dermatology
- Cell Biology
Background:
- Melanin is crucial for skin pigmentation; its deficiency causes vitiligo.
- Vitiligo treatment remains challenging despite extensive research.
- Spermidine, an anti-aging compound, was investigated for its effects on melanogenesis.
Purpose of the Study:
- To explore spermidine's potential role in stimulating melanin production.
- To assess spermidine's impact on melanogenesis pathways and cellular processes.
Main Methods:
- MTT assay to evaluate cytotoxicity in B16F1 cells.
- DCFH-DA analysis to measure intracellular hydrogen peroxide levels.
- Assessment of melanin synthesis and tyrosinase activity in cell cultures.
Main Results:
- Spermidine showed tyrosinase activity but was cytotoxic at 2000 μM.
- It reduced intracellular hydrogen peroxide above 125 μM.
- Spermidine increased melanin synthesis in both normal and hydrogen peroxide-treated B16F1 cells.
- Enhanced expression of tyrosine hydroxylase via MITF was observed.
Conclusions:
- Spermidine demonstrates potential as a melanin synthesis stimulator.
- Its ability to reduce oxidative stress and enhance melanogenesis factors is promising.
- Spermidine may be a viable option for preventing hair greying.
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