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Related Experiment Video

Updated: Apr 21, 2026

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TGFβ3 regulates periderm removal through ΔNp63 in the developing palate.

Lihua Hu1, Jingpeng Liu, Zhi Li

  • 1Department of Oral Biology, University of Nebraska Medical Center, Lincoln, Nebraska; Department of Orthodontics, Shandong Provincial Key Laboratory of Oral Biomedicine, School of Stomatology, Shandong University, Jinan, China.

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|November 1, 2014
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Summary

Transforming growth factor β3 (TGFβ3) signaling is crucial for periderm removal during palate development. This process is essential for preventing cleft palate by ensuring proper medial edge epithelia adhesion.

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Area of Science:

  • Developmental Biology
  • Molecular Biology
  • Genetics

Background:

  • The periderm, an embryonic epithelium, must be removed for proper palate fusion.
  • Failure in periderm removal leads to cleft palate, a common birth defect.
  • Transforming growth factor β3 (TGFβ3) is expressed during periderm degeneration, but its role is unclear.

Purpose of the Study:

  • To investigate the association between TGFβ3 signaling and IRF6/ΔNp63 genes in palate development.
  • To elucidate the role of TGFβ3 in periderm desquamation during palatogenesis.

Main Methods:

  • Biochemical analysis of palatal sections from TGFβ3 (-/-), ΔNp63 (-/-), and wild-type embryos.
  • Gene activity and protein expression assays in primary medial edge epithelia (MEE) cells.
  • Analysis of the interplay between TGFβ3, IRF6, and ΔNp63 during embryonic palate development.

Main Results:

  • TGFβ3 signaling is required to repress ΔNp63, which is essential for periderm desquamation.
  • In TGFβ3 (-/-) embryos, inadequate periderm removal causes cleft palate due to failed palatal seam formation.
  • In ΔNp63 (-/-) embryos, cleft palate results from premature fusion, indicating a role in regulating fusion timing.

Conclusions:

  • Functional TGFβ3 signaling is critical for repressing ΔNp63 and coordinating periderm shedding.
  • The TGFβ3-ΔNp63 axis is a key regulator of epithelial adhesion and differentiation during palate development.
  • Dysregulation of this pathway contributes to cleft palate etiology.