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p44/42 MAPK signaling is a prime target activated by phenylethyl resorcinol in its anti-melanogenic action

Mingyeong Kang1, See-Hyoung Park2, Se Jung Park1

  • 1Molecular Dermatology Laboratory, Department of Integrative Biotechnology, College of Biotechnology and Bioengineering, Sungkyunkwan University, Suwon City, 16419 Gyunggi Do, Republic of Korea.

Phytomedicine : International Journal of Phytotherapy and Phytopharmacology
|March 9, 2019
PubMed
Abstract

Insights

Phenylethyl resorcinol effectively reduces skin melanin production by inhibiting tyrosinase activity and impacting MAPK signaling pathways. This suggests its potential as a therapeutic for hyperpigmentation disorders.

Area of Science:

  • Dermatology and Molecular Biology
  • Skin Physiology and Pigmentation

Background:

  • Melanin protects skin from UV radiation but its overproduction causes hyperpigmentation.
  • Understanding melanogenesis is key to treating skin pigmentation disorders.

Purpose of the Study:

  • To investigate the effects of phenylethyl resorcinol on melanogenesis.
  • To elucidate the underlying molecular mechanisms of phenylethyl resorcinol's action in B16F10 melanoma cells and human melanocytes.

Main Methods:

  • In vitro assays including cell survival, melanin content, and tyrosinase activity measurements.
  • Molecular analyses using real-time PCR, Western blot, luciferase reporter assays, and ELISAs.
  • Investigated signaling pathways such as cAMP, NF-κB, and MAPKs (mitogen-activated protein kinases).

Main Results:

  • Phenylethyl resorcinol decreased melanin content and tyrosinase activity in cells and in cell-free assays.
  • It suppressed mRNA levels of tyrosinase and TRP-2 but not MITF or TRP-1.
  • The compound activated activator protein-1 (AP-1) signaling via p44/42 MAPK phosphorylation, independent of cAMP and NF-κB pathways.

Conclusions:

  • Phenylethyl resorcinol's anti-melanogenic activity is mediated by p44/42 MAPK activation.
  • Its mechanism involves inhibiting key melanogenic enzymes and regulating transcription factors.
  • Phenylethyl resorcinol shows promise as a therapeutic agent for hyperpigmentation disorders.
Keywords:
AP-1MITFMelanogenesisPhenylethyl resorcinolp44/42 MAPK

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