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Filamin A (FLNA) is required for cell-cell contact in vascular development and cardiac morphogenesis

Yuanyi Feng1, Ming Hui Chen, Ivan P Moskowitz

  • 1Division of Genetics and Department of Cardiology, Children's Hospital Boston, Boston, MA 02215, USA.

Proceedings of the National Academy of Sciences of the United States of America
|December 19, 2006
PubMed

Insights

Mutations in the Filamin A (FLNA) gene cause severe developmental defects, including cardiac abnormalities and disrupted neuronal migration. FLNA is essential for proper cell junction organization, explaining these diverse defects.

Area of Science:

  • Developmental Biology
  • Genetics
  • Cell Biology

Background:

  • Mutations in the human Filamin A (FLNA) gene are linked to neuronal migration disorders and cardiovascular defects.
  • FLNA is a crucial cytoskeletal protein involved in cell structure and signaling.

Purpose of the Study:

  • To investigate the role of Filamin A (FLNA) in embryonic development.
  • To elucidate the cellular mechanisms underlying FLNA-associated developmental abnormalities.

Main Methods:

  • Analysis of Flna-null mouse embryos to assess developmental phenotypes.
  • Examination of cellular organization and intercellular junctions in various tissues.

Main Results:

  • Complete loss of Flna in mice leads to embryonic lethality with severe cardiac and vascular defects.
  • Flna-null embryos exhibit abnormal epithelial and endothelial organization and aberrant adherens junctions.
  • Cell migration and motility were not broadly affected, suggesting a specific role for FLNA in junctional integrity.

Conclusions:

  • FLNA plays an essential role in maintaining proper intercellular junction structure during embryonic development.
  • Defects in FLNA-dependent cell junctions provide a mechanism for the diverse developmental abnormalities observed in FLNA mutation patients.

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