Sox2+ Stem Cells Contribute to All Epithelial Lineages of the Tooth via Sfrp5+ Progenitors

Emma Juuri, Kan Saito, Laura Ahtiainen, Kerstin Seidel, Mark Tummers, Konrad Hochedlinger, Ophir D. Klein, Irma Thesleff, Frederic Michon

Research output: Contribution to journalArticlepeer-review

154 Citations (Scopus)

Abstract

The continuously growing mouse incisor serves as a valuable model to study stem cell regulation during organ renewal. Epithelial stem cells are localized in the proximal end of the incisor in the labial cervical loop. Here, we show that the transcription factor Sox2 is a specific marker for these stem cells. Sox2+ cells became restricted to the labial cervical loop during tooth morphogenesis, and they contributed to the renewal of enamel-producing ameloblasts as well as all other epithelial cell lineages of the tooth. The early progeny of Sox2-positive stem cells transiently expressed the Wnt inhibitor Sfrp5. Sox2 expression was regulated by the tooth initiation marker FGF8 and specific miRNAs, suggesting a fine-tuning to maintain homeostasis of the dental epithelium. The identification of Sox2 as a marker for the dental epithelial stem cells will facilitate further studies on their lineage segregation and differentiation during tooth renewal.

Original languageEnglish
Pages (from-to)317-328
Number of pages12
JournalDevelopmental cell
Volume23
Issue number2
DOIs
Publication statusPublished - 2012 Aug 14
Externally publishedYes

ASJC Scopus subject areas

  • Molecular Biology
  • Biochemistry, Genetics and Molecular Biology(all)
  • Developmental Biology
  • Cell Biology

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