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Related Experiment Videos

Fibroblast growth factor interactions in the developing lung.

D Lebeche1, S Malpel, W V Cardoso

  • 1Pulmonary Center, Boston University School of Medicine, 80 East Concord Street R-304, Boston, MA 02118, USA.

Mechanisms of Development
|August 14, 1999
PubMed
Summary
This summary is machine-generated.

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Fibroblast growth factors (FGFs) interact with Sonic hedgehog (Shh), bone morphogenetic protein 4 (BMP-4), and TGFbeta-1 to regulate embryonic lung development. This study reveals a complex regulatory circuit essential for organogenesis.

Area of Science:

  • Developmental biology
  • Molecular signaling pathways in organogenesis

Background:

  • Epithelial-mesenchymal interactions mediate organogenesis through gene networks.
  • Fibroblast growth factor (FGF) signaling is crucial for embryonic lung development, controlling proliferation, differentiation, and pattern formation.
  • The interplay between FGFs and other signaling molecules in lung development is not well understood.

Purpose of the Study:

  • To investigate the regulatory circuit involving FGFs, Sonic hedgehog (Shh), bone morphogenetic protein 4 (BMP-4), and TGFbeta-1 in embryonic lung development.
  • To elucidate how FGFs interact with other signaling molecules to control lung organogenesis.

Main Methods:

  • Utilized cell and organ culture systems.
  • Analyzed the differential regulation of FGF-10 and FGF-7 by FGF-1, FGF-2, and Shh.

Related Experiment Videos

  • Investigated the regulation of Shh, BMP-4, and other FGF family members by FGFs.

    • Main Results:

    • Demonstrated that FGFs, Shh, BMP-4, and TGFbeta-1 form a regulatory circuit relevant for lung development.
    • Showed differential regulation of FGF-10 and FGF-7 by FGF-1, FGF-2, and Shh.
    • Confirmed that FGFs regulate the expression of Shh, BMP-4, and other FGF family members.

    Conclusions:

    • A regulatory circuit involving FGFs, Shh, BMP-4, and TGFbeta-1 is critical for embryonic lung development.
    • Shh, TGFbeta-1, and BMP-4 counteract the bud-promoting effects of FGF-10.
    • FGF levels during lung development are maintained by FGFs and Shh.