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PTEN regulates lung endodermal morphogenesis through MEK/ERK pathway.

Yiming Xing1, Runming Wang1, Changgong Li2

  • 1The State Key Laboratory for Agro-biotechnology, China Agricultural University, Beijing 100191, PR China.

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|October 14, 2015
PubMed
Summary
This summary is machine-generated.

Loss of the Pten gene in embryonic lungs disrupts branching and cell migration. This process appears to involve the ERK signaling pathway, but not AKT, highlighting Pten

Keywords:
AKTBranching morphogenesisCell migrationERKEndodermLung morphogenesisPten

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Area of Science:

  • Developmental Biology
  • Cancer Research
  • Cell Signaling

Background:

  • The phosphatase and tensin homolog (Pten) gene is a crucial tumor suppressor involved in various cellular functions.
  • Pten mutations are linked to numerous human cancers.
  • Pten's role in cell migration and its precise mechanism in lung development are not fully understood.

Purpose of the Study:

  • To investigate the function of Pten in embryonic lung branching morphogenesis.
  • To elucidate the specific signaling pathways, particularly ERK and AKT, involved in Pten-mediated lung development.

Main Methods:

  • Conditional deletion of Pten in embryonic lung epithelium using Gata5-cre mice.
  • Analysis of branching morphogenesis, cell proliferation, and cell migration in Pten-deficient lungs.
  • Utilizing explant models and conditional mutants to block ERK or AKT phosphorylation.

Main Results:

  • Pten deletion blocked embryonic lung branching and phosphorylation of ERK and AKT.
  • Pten-deficient lung endoderm explants failed to branch, with disrupted cell migration but unaffected proliferation.
  • Blocking ERK phosphorylation, but not AKT, exacerbated the branching defect, implicating ERK in Pten's role.

Conclusions:

  • Pten is essential for embryonic lung branching morphogenesis.
  • Pten's requirement for lung development involves regulating cell migration.
  • The ERK signaling pathway, not AKT, mediates Pten's role in embryonic lung endodermal morphogenesis and cell migration.