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Platelet function in acute experimental pancreatitis.

Thilo Hackert1, Dagmar Pfeil, Werner Hartwig

  • 1Department of Surgery, University of Heidelberg, INF 110, 69120, Heidelberg, Germany. Thilo_Hackert@med.uni-heidelberg.de

Journal of Gastrointestinal Surgery : Official Journal of the Society for Surgery of the Alimentary Tract
|April 17, 2007
PubMed
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Platelet activation significantly contributes to acute pancreatitis, particularly the severe necrotizing form. This study reveals increased platelet-endothelium interactions and impaired microcirculation in experimental pancreatitis.

Area of Science:

  • Gastroenterology
  • Hematology
  • Pathophysiology

Background:

  • Acute pancreatitis (AP) involves pancreatic microcirculation disturbances.
  • The role of platelets in AP-related perfusion issues is not fully understood.

Purpose of the Study:

  • To investigate platelet activation and function in experimental acute pancreatitis.
  • To determine the contribution of platelets to microcirculatory disturbances in AP.

Main Methods:

  • Experimental AP induced in rats using cerulein (mild) or glycodeoxycholic acid (GDOC)+cerulein (severe).
  • Intravital microscopy assessed platelet-endothelium interaction, erythrocyte velocity, and leukocyte adhesion.
  • Serum amylase, thromboxane A2 levels, and histology were analyzed.

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Main Results:

  • Severe AP models showed significant platelet-endothelium interaction, reduced erythrocyte velocity, and increased leukocyte adhesion.
  • Elevated thromboxane A2 levels correlated with platelet activation and AP severity.
  • Mild AP featured transient platelet-endothelium interaction; severe AP showed firm adhesion, coagulatory activation, and perfusion failure.

Conclusions:

  • Platelet activation is crucial in acute pancreatitis, especially the necrotizing form.
  • Platelet-endothelium interactions and subsequent microcirculatory dysfunction are key mechanisms in AP pathogenesis.