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Related Experiment Videos

Aprotinin diminishes inflammatory processes

R Soeparwata1, A R Hartman, U Frerichmann

  • 1Department of Thoracic and Cardiovascular Surgery, Westphalian Wilhelm University, Münster, Germany.

International Journal of Cardiology
|April 26, 1996
PubMed
Summary
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Aprotinin, a protease inhibitor, reduces inflammatory responses during cardiopulmonary bypass surgery. It lowers cytokine levels and immunocyte activation, mitigating the trauma associated with the procedure.

Area of Science:

  • Cardiovascular Surgery
  • Immunology
  • Pharmacology

Background:

  • Cytokine levels change during cardiopulmonary bypass (CPB), indicating a trauma response.
  • Aprotinin is a protease inhibitor used to reduce bleeding and inflammation during CPB.

Purpose of the Study:

  • To investigate the effect of Aprotinin on cytokine levels and immunocyte activation during CPB.
  • To understand how Aprotinin modulates the inflammatory response in CPB.

Main Methods:

  • Measured plasma levels of interleukin-8 (IL-8), IL-6, IL-1 beta, and tumor necrosis factor (TNF) in 20 patients undergoing CPB.
  • Assessed immunocyte (granulocytes, monocytes) activity using computer-assisted microscopy.
  • Conducted in-vitro experiments exposing immunocytes to patient plasma with and without Aprotinin.

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Main Results:

  • IL-8 and IL-6 levels significantly increased post-CPB, returning to baseline by day 3.
  • IL-1 beta and TNF levels remained unchanged.
  • Immunocyte activation (ameboid conformation, mobility) peaked at 120 min post-surgery.
  • In-vitro, patient plasma increased immunocyte activation to 65%, which dropped to 25% with Aprotinin addition.

Conclusions:

  • Aprotinin effectively reduces cytokine and cellular activation during CPB.
  • The findings suggest Aprotinin mitigates the acute inflammatory response in CPB, potentially by inhibiting hyperstimulated immunocytes.