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The endothelial glycocalyx protects against myocardial edema

Bernard M van den Berg1, Hans Vink, Jos A E Spaan

  • 1Department of Medical Physics, Academic Medical Center, University of Amsterdam, PO Box 22700, 1100 DE Amsterdam, The Netherlands.

Circulation Research
|March 15, 2003
PubMed

Insights

A protective carbohydrate layer on heart capillaries prevents fluid leakage and tissue swelling. Degradation of this layer causes immediate myocardial tissue edema, impacting cardiac function.

Area of Science:

  • Cardiovascular Biology
  • Endothelial Cell Biology
  • Microvascular Physiology

Background:

  • Myocardial tissue edema, caused by microvascular fluid loss, impairs cardiac function following events like ischemia, surgery, hypertension, and sepsis.
  • Carbohydrate structures on the endothelium's surface are implicated in preventing tissue edema.

Purpose of the Study:

  • To investigate the role of endothelial carbohydrate structures in preventing myocardial tissue edema.
  • To visualize and characterize the carbohydrate layer on rat myocardial capillaries.

Main Methods:

  • Preservation of endothelial carbohydrate structures for electron microscopy.
  • Visualization of the rat myocardial capillary endothelial surface using electron microscopy.

Main Results:

  • The rat myocardial capillary endothelial surface possesses a carbohydrate layer 0.2–0.5 microm thick.
  • Degradation of this carbohydrate layer led to immediate and significant myocardial tissue edema.

Conclusions:

  • The endothelial carbohydrate layer is crucial for maintaining vascular barrier integrity and preventing myocardial edema.
  • Disruption of this layer has direct and rapid pathological consequences on myocardial tissue.

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