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Fibronectin expression in the cardiovascular system

A Sabri1, F Farhadian, F Contard

  • 1Unité 127 INSERM, IFR Circulation, Université D Diderot, Hôpital Lariboisiére, Paris, France.

Herz
|April 1, 1995
PubMed
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Fibronectin (FN) expression changes during cardiovascular development and disease. Specific FN isoforms are re-expressed in the adult heart and aorta during hypertension and infarction, indicating regulated splicing.

Area of Science:

  • Cardiovascular Biology
  • Molecular Biology
  • Extracellular Matrix Research

Background:

  • Fibronectin (FN) is a key extracellular matrix glycoprotein involved in cell adhesion, migration, and tissue repair.
  • Alternative splicing of the FN gene generates diverse protein isoforms with distinct functions.
  • FN expression patterns are altered in the cardiovascular system during development, aging, and disease states.

Purpose of the Study:

  • To review the characteristics of fibronectin expression in the cardiovascular system.
  • To describe the regulation of FN expression during cardiac development and in response to cardiovascular pathologies.
  • To highlight the differential re-expression of FN isoforms in the adult myocardium and aorta.

Main Methods:

  • Review of existing literature on fibronectin expression in the cardiovascular system.

Related Experiment Videos

  • Analysis of spatial and temporal alterations in FN expression during fetal development, hypertrophy, infarction, arterial injury, and aging.
  • Examination of in vitro and in vivo studies on FN expression.

    • Main Results:

    • FN mRNA levels are high during early cardiac organogenesis and decrease progressively through senescence.
    • A correlation exists between total FN mRNA and specific spliced variants (FN-EIIIA, EIIIB) during cardiac ontogeny, but not in adult cardiac growth.
    • Differential re-expression of FN isoforms occurs in the myocardium and aorta during hypertension and infarction, with varying thresholds and time courses.

    Conclusions:

    • Fibronectin expression is tightly regulated during cardiovascular development.
    • The alternative splicing of fibronectin pre-mRNA in the adult heart is specifically modulated by pathological conditions.
    • Understanding FN isoform regulation is crucial for comprehending cardiovascular adaptation and disease progression.