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Updated: Jun 12, 2026
Quantification of Hypopigmentation Activity In Vitro
Published on: March 6, 2019
Curcumin suppresses alpha-melanocyte stimulating hormone-stimulated melanogenesis in B16F10 cells
Jun-Hyuk Lee1, Ji-Yeon Jang, Cheol Park
1Chemistry and Biotechnology Examination Bureau, Korean Intellectual Property Office, Daejeon 302-701, Korea.
Abstract:
The present study was designed to assess the potential inhibitory activity of curcumin on the alpha-melanocyte stimulating hormone (alpha-MSH)-stimulated melanogenesis signal pathway in B16F10 melanoma cells. The molecular mechanism of curcumin-induced inhibitory activity on the alpha-MSH-stimulated melanogenesis signal pathway, including expression of melanogenesis-related proteins and activation of melanogenesis-regulating proteins, was examined in B16F10 cells. Curcumin suppressed the cellular melanin contents and the tyrosinase activity in alpha-MSH-stimulated B16F10 cells. In addition, the expression of melanogenesis-related proteins such as microphthalmia-associated transcription factor (MITF), tyrosinase, and tyrosinase-related protein 1 and 2 was suppressed by curcumin in the alpha-MSH-stimulated B16F10 cells. Notably, a melanogenesis-regulating signal such as mitogen-activated protein kinase kinase (MEK)/extracellular signal-regulated kinase (ERK) or phosphatidylinositol 3-kinase (PI3K)/Akt was activated by curcumin in the B16F10 cells treated with or without alpha-MSH. The suppressive activity of curcumin on alpha-MSH-induced melanogenesis was down-regulated by PD98059 and by LY294002. Our results suggest that the suppressive activity of curcumin on alpha-MSH-stimulated melanogenesis may involve the down-regulation of MITF and its downstream signal pathway through the activation of MEK/ERK or PI3K/Akt.
Insights
Curcumin inhibits skin pigmentation by blocking the alpha-melanocyte stimulating hormone (alpha-MSH) pathway in melanoma cells. This natural compound reduces melanin production and key protein expression, offering potential for skin lightening applications.
Area of Science:
- Biochemistry
- Cell Biology
- Dermatology
Background:
- Melanogenesis, the process of melanin production, is regulated by alpha-melanocyte stimulating hormone (alpha-MSH).
- Dysregulation of melanogenesis is implicated in hyperpigmentation disorders and melanoma.
- Curcumin, a compound from turmeric, exhibits various biological activities, including potential effects on skin pigmentation.
Purpose of the Study:
- To investigate the inhibitory effects of curcumin on the alpha-MSH-stimulated melanogenesis pathway in B16F10 melanoma cells.
- To elucidate the molecular mechanisms underlying curcumin's action on melanogenesis.
- To assess curcumin's impact on key proteins and signaling pathways involved in melanin production.
Main Methods:
- B16F10 melanoma cells were treated with alpha-MSH and varying concentrations of curcumin.
- Cellular melanin content and tyrosinase activity were measured.
- Expression levels of melanogenesis-related proteins (MITF, tyrosinase, TRP-1, TRP-2) were analyzed.
- Activation of signaling pathways (MEK/ERK, PI3K/Akt) was assessed.
- Inhibitory effects of PD98059 and LY294002 on curcumin's activity were evaluated.
Main Results:
- Curcumin significantly suppressed cellular melanin content and tyrosinase activity in alpha-MSH-stimulated B16F10 cells.
- Curcumin reduced the expression of microphthalmia-associated transcription factor (MITF) and other key melanogenesis proteins.
- Curcumin activated the MEK/ERK and PI3K/Akt signaling pathways.
- The inhibitory effects of curcumin were partially reversed by MEK/ERK and PI3K/Akt inhibitors.
Conclusions:
- Curcumin exhibits inhibitory activity against alpha-MSH-stimulated melanogenesis in melanoma cells.
- The mechanism involves down-regulation of MITF and its downstream targets.
- Activation of MEK/ERK and PI3K/Akt pathways appears to play a role in curcumin's suppressive effects.
- Curcumin holds potential as a therapeutic agent for hyperpigmentation disorders.
