Korean Journal of Plant Resources (한국자원식물학회지)

The Plant Resources Society of Korea (한국자원식물학회)
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Anti-Melanogenic Activities of Ranunculus chinensis Bunge via ERK1/2-Mediated MITF Downregulation

  • Min-Jin, Kim (Nakdonggang National Institute of Biological Resources) ;
  • Yong Tae, Jeong (Nakdonggang National Institute of Biological Resources) ;
  • Buyng Su, Hwang (Nakdonggang National Institute of Biological Resources) ;
  • Yong, Hwang (Nakdonggang National Institute of Biological Resources) ;
  • Dae Won, Jeong (Nakdonggang National Institute of Biological Resources) ;
  • Yeong Taek, Oh (Nakdonggang National Institute of Biological Resources)
  • Received : 2022.09.01
  • Accepted : 2022.10.11
  • Published : 2022.12.01
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Abstract

Research on whitening materials using natural alternatives is actively being conducted. The aim of this study was to investigate the in vitro inhibitory effects of Ranunculus chinensis Bunge (RCB) on melanogenesis and associated enzymes, such as tyrosinase, tyrosinase-related protein (TRP)-1, and TRP-2 in B16F10 murine melanoma cells. We found that RCB extract significantly attenuated melanin synthesis and reduced the activity of intracellular tyrosinase, a rate-limiting melanogenic enzyme. Western blot analysis showed that RCB extract decreased the protein expression of tyrosinase and TRP-1. In addition, it significantly decreased the expression of microphthalmia-associated transcription factor (MITF), a key regulator of melanogenesis. Extracellular signal-regulated kinase (ERK) activation has been reported to be involved in the inhibition of melanogenesis. Thus, we investigated whether the hypopigmentary effects of RCB extract were related to the activation of ERK. RCB extract induced ERK phosphorylation in a dose-dependent manner. Furthermore, it markedly inhibited body pigmentation in a zebrafish model. Our results suggest that RCB extract inhibits melanogenesis by activating ERK pathway-mediated suppression of MITF and its downstream target genes, including tyrosinase. Therefore, RCB extract can be used as a whitening agent in the development of functional cosmetics.

Keywords

Acknowledgement

This work was supported by a grant from the Nakdonggang National Institute of Biological Resources (NNIBR), funded by the Ministry of Environment (MOE) of the Republic of Korea (NNIBR202202110).

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