Linking αMSH with PPARγ in B16-F10 melanoma

Vittoria Maresca, Enrica Flori, Emanuela Camera, Barbara Bellei, Nicaela Aspite, Matteo Ludovici, Caterina Catricalà, Giorgia Cardinali, Mauro Picardo

Research output: Contribution to journalArticlepeer-review

Abstract

We have discovered a new α-melanocyte stimulating hormone (α-MSH)/peroxisome proliferator activated receptor-γ (PPAR-γ) connection in B16-F10 cells. Both PPAR-γ up-regulation and its induction as an active transcription factor were observed in response to α-MSH. The α-MSH/PPAR-γ connection influenced both pigmentation and proliferation. The forskolin-stimulated cAMP/PKA pathway was not able to induce either PPAR-γ translocation into the nucleus or PPAR-γ transcriptional activity. As the melanocortin-1 receptor, the specific receptor for the α-MSH, is a G-protein coupled receptor, we wondered whether the phosphatidylinositol [PI(4,5)P2/PLCβ] signal pathway was involved in mediating the α-MSH-dependent PPAR-γ activation. Employing inhibitors of PI(4,5)P2/PLCβ pathway, the results of our experiments suggested that this pathway was promoted by α-MSH and that α-MSH played a role in mediating PPAR-γ activation. We have demonstrated, for the first time, that α-MSH induces the PI(4,5)P2/PLCβ pathway, through analysis of the basic steps of the pathway. The α-MSH effect on PPAR-γ was independent of animal species and was not correlated with the physio-pathological status.

Original languageEnglish
Pages (from-to)113-127
Number of pages15
JournalPigment Cell and Melanoma Research
Volume26
Issue number1
DOIs
Publication statusPublished - Jan 2013

Keywords

  • α-melanocyte stimulating hormone
  • B16-F10
  • Calcium fluxes
  • Peroxisome proliferator activated receptor-γ
  • PI(4,5)P
  • PLC pathway

ASJC Scopus subject areas

  • Dermatology
  • Oncology
  • Biochemistry, Genetics and Molecular Biology(all)

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