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Isolation of Endothelial Progenitor Cells from Healthy Volunteers and Their Migratory Potential Influenced by Serum Samples After Cardiac Surgery
08:43

Isolation of Endothelial Progenitor Cells from Healthy Volunteers and Their Migratory Potential Influenced by Serum Samples After Cardiac Surgery

Published on: February 14, 2017

Cytokine secretion after cardiac surgery and its relationship to postoperative fever

John D Mitchell1, Hilary P Grocott, Barbara Phillips-Bute

  • 1Department of Anesthesiology and Critical Care Medicine, Division of Cardiothoracic Anesthesiology, Duke University Medical Center, Durham, NC 27710, USA.

Cytokine
|June 19, 2007
PubMed

Insights

Post-coronary artery bypass graft (CABG) surgery fever is linked to elevated Interleukin-6 (IL-6) levels, suggesting inflammatory mediation. This study details cytokine patterns following cardiopulmonary bypass (CPB) and their association with fever development in CABG patients.

Area of Science:

  • Cardiovascular Surgery
  • Immunology
  • Critical Care Medicine

Background:

  • The inflammatory response to cardiopulmonary bypass (CPB) is a known factor in post-cardiac surgery complications.
  • Fever after coronary artery bypass graft (CABG) surgery is common, but its direct link to specific inflammatory markers has not been thoroughly investigated.

Purpose of the Study:

  • To investigate the temporal patterns of key cytokine elevations following CABP.
  • To determine the association between these cytokine levels and the development of fever after CABG surgery.

Main Methods:

  • Serum levels of TNF-alpha, IL-1ra, IL-1beta, IL-6, and IL-8 were measured in 355 CABG patients before surgery and at multiple time points up to 48 hours post-CPB.
  • Fever was defined as a temperature exceeding 38°C.
  • Statistical analysis was performed to identify predictors of fever.

Main Results:

  • Cytokine profiles exhibited distinct temporal patterns, with some showing early peaks and others a bimodal secretion pattern.
  • Elevated Interleukin-6 (IL-6) levels and male gender were identified as significant predictors of post-CABG fever (C-index=0.68; p=0.0003).
  • No significant association was found between fever and other measured cytokines (TNF-alpha, IL-1ra, IL-1beta, IL-8).

Conclusions:

  • The study highlights a previously undescribed bimodal cytokine secretion pattern after CABG.
  • The significant association between elevated IL-6 levels and fever suggests that IL-6 plays a key role in mediating post-CABG fever.
  • These findings contribute to understanding the inflammatory response following cardiac surgery and may inform future management strategies.

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