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Additive effects of heat and p38 MAPK inhibitor treatment on melanin synthesis

Dong-Seok Kim1, Seo-Hyoung Park, Sun-Bang Kwon

  • 1Department of Medicine, College of Medicine, Chung-Ang University, Seoul 156-756, Korea.

Archives of Pharmacal Research
|July 10, 2007
PubMed

Insights

Heat activates extracellular signal-regulated kinase (ERK) and reduces melanin production. Combining heat with p38 mitogen-activated protein kinase (MAPK) inhibition offers a more effective strategy for decreasing melanogenesis.

Area of Science:

  • Cell Biology
  • Dermatology
  • Biochemistry

Background:

  • Extracellular signal-regulated kinase (ERK) activation is known to reduce melanin synthesis.
  • Heat treatment has been observed to activate ERK and inhibit melanogenesis in mouse melanocyte cell lines.
  • p38 mitogen-activated protein kinase (MAPK) inhibition has been reported to block melanogenesis.

Purpose of the Study:

  • To investigate the effects of heat treatment and p38 MAPK inhibition on melanogenesis in human melanocytes.
  • To determine if combining heat treatment and p38 MAPK inhibition enhances the reduction of melanin synthesis.

Main Methods:

  • Human melanocytes were subjected to heat treatment.
  • The p38 MAPK inhibitor SB203580 was used.
  • Melanin synthesis, tyrosinase activity, and the activation of ERK and p38 MAPK pathways were measured.
  • Combined treatment of heat and SB203580 was applied.

Main Results:

  • Heat treatment activated ERK and reduced melanin production in human melanocytes.
  • This reduction in melanin was associated with decreased tyrosinase activity.
  • Combined heat treatment and SB203580 treatment resulted in a greater reduction of melanin synthesis compared to either treatment alone.

Conclusions:

  • ERK activation and p38 MAPK inhibition can act additively to decrease melanogenesis.
  • This combined approach offers a potent strategy for regulating melanin production.

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