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Cardiac growth and angiogenesis coordinated by intertissue interactions

Kenneth Walsh1, Ichiro Shiojima

  • 1Molecular Cardiology Unit, Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, Massachusetts 02118, USA. kxwalsh@bu.edu

The Journal of Clinical Investigation
|November 3, 2007
PubMed

Insights

New research reveals reciprocal signals between heart muscle (myocytes) and blood vessels (angiogenesis) are crucial for healthy heart growth. Disruptions can lead to heart failure.

Area of Science:

  • Cardiovascular Biology
  • Molecular Cardiology
  • Vascular Biology

Background:

  • Cardiac hypertrophy and angiogenesis are tightly regulated during adaptive heart growth.
  • Imbalances between myocardial growth and vascularization can cause heart failure.
  • Angiogenic growth factors secreted by myocytes facilitate vascular adaptation to myocardial growth.

Discussion:

  • Two studies in this issue elucidate mechanisms linking cardiac growth and coronary angiogenesis.
  • Heineke et al. identify GATA4 as a stress-responsive transcription factor in cardiac myocytes that promotes angiogenic factor expression.
  • Tirziu et al. demonstrate that increased coronary angiogenesis stimulates myocyte hypertrophy via a nitric oxide-dependent pathway.

Key Insights:

  • GATA4 acts as a key regulator, linking myocyte stress to the induction of angiogenic factors.
  • Enhanced angiogenesis can directly promote myocyte hypertrophic growth through nitric oxide signaling.
  • Reciprocal paracrine signaling between myocytes and vasculature supports coordinated cardiac growth.

Outlook:

  • Further understanding these reciprocal signals is vital for developing therapies for heart failure.
  • Targeting GATA4 or nitric oxide pathways may offer novel therapeutic strategies.
  • Investigating the interplay between cardiac growth and angiogenesis can reveal new targets for cardiovascular disease treatment.

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