NRG1/ERBB3 signaling in melanocyte development and melanoma: Inhibition of differentiation and promotion of proliferation

Kristina Buac, Mai Xu, Julie Cronin, Ashani T. Weeraratna, Stephen M. Hewitt, William J. Pavan

Research output: Contribution to journalArticlepeer-review

56 Scopus citations


Neuregulin (NRG) signaling through the receptor tyrosine kinase, ERBB3, is required for embryonic development, and dysregulated signaling has been associated with cancer progression. Here, we show that NRG1/ERBB3 signaling inhibits melanocyte (MC) maturation and promotes undifferentiated, migratory and proliferative cellular characteristics. Embryonic analyses demonstrated that initial MC specification and distribution were not dependent on ERBB3 signaling. However NRG1/ERBB3 signaling was both necessary and sufficient to inhibit differentiation of later stages of MC development in culture. Analysis of tissue arrays of human melanoma samples suggests that ERBB3 signaling may also contribute to metastatic progression of melanoma as ERBB3 was phosphorylated in primary tumors compared with nevi or metastatic lesions. Neuregulin 1-treated MCs demonstrated increased proliferation and invasion and altered morphology concomitant with decreased levels of differentiation genes, increased levels of proliferation genes and altered levels of melanoma progression and metastases genes. ERBB3 activation in primary melanomas suggests that NRG1/ERBB3 signaling may contribute to the progression of melanoma from benign nevi to malignancies. We propose that targeting ERBB3 activation and downstream genes identified in this study may provide novel therapeutic interventions for malignant melanoma.

Original languageEnglish (US)
Pages (from-to)773-784
Number of pages12
JournalPigment Cell and Melanoma Research
Issue number6
StatePublished - Dec 2009
Externally publishedYes


  • Erbb3
  • Melanocytes
  • Melanoma
  • Neural crest
  • Neuregulin

ASJC Scopus subject areas

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


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