Stabilization of β-catenin promotes melanocyte specification at the expense of the Schwann cell lineage

Sophie Colombo, Valérie Petit, Roselyne Y. Wagner, Delphine Champeval, Ichiro Yajima, Franck Gesbert, Zackie Aktary, Irwin Davidson, Véronique Delmas, Lionel Larue

研究成果: Article査読

抄録

The canonical Wnt/β-catenin pathway governs a multitude of developmental processes in various cell lineages, including the melanocyte lineage. Indeed, β-catenin regulates transcription of Mitf-M, the master regulator of this lineage. The first wave of melanocytes to colonize the skin is directly derived from neural crest cells, whereas the second wave of melanocytes is derived from Schwann cell precursors (SCPs). We investigated the influence of β-catenin in the development of melanocytes of the first and second waves by generating mice expressing a constitutively active form of β-catenin in cells expressing tyrosinase. Constitutive activation of β-catenin did not affect the development of truncal melanoblasts but led to marked hyperpigmentation of the paws. By activating β-catenin at various stages of development (E8.5-E11.5), we showed that the activation of β-catenin in bipotent SCPs favored melanoblast specification at the expense of Schwann cells in the limbs within a specific temporal window. Furthermore, in vitro hyperactivation of the Wnt/β-catenin pathway, which is required for melanocyte development, induces activation of Mitf-M, in turn repressing FoxD3 expression. In conclusion, β-catenin overexpression promotes SCP cell fate decisions towards the melanocyte lineage.

本文言語English
ジャーナルDevelopment (Cambridge)
149
2
DOI
出版ステータスPublished - 2022 1月
外部発表はい

ASJC Scopus subject areas

  • 分子生物学
  • 発生生物学

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