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A Mouse Tumor Model of Surgical Stress to Explore the Mechanisms of Postoperative Immunosuppression and Evaluate Novel Perioperative Immunotherapies
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A Mouse Tumor Model of Surgical Stress to Explore the Mechanisms of Postoperative Immunosuppression and Evaluate Novel Perioperative Immunotherapies

Published on: March 12, 2014

Surgical trauma and postoperative immune dysfunction.

P Menges1, W Kessler, C Kloecker

  • 1Department of Surgery: General Surgery, Visceral, Thoracic and Vascular Surgery, University Hospital Greifswald, Greifswald, Germany. pia.menges@uni-greifswald.de

European Surgical Research. Europaische Chirurgische Forschung. Recherches Chirurgicales Europeennes
|June 2, 2012
PubMed
Summary
This summary is machine-generated.

Postoperative sepsis increases mortality due to immune dysfunction. This study links animal models and human data, showing trauma-induced immune suppression impacts sepsis classification.

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10:08

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Published on: April 18, 2011

Area of Science:

  • Immunology
  • Surgical Pathology
  • Critical Care Medicine

Background:

  • Postoperative sepsis mortality is linked to surgically induced immune dysfunction.
  • Trauma, burns, and stroke exacerbate immune suppression.
  • Animal models and clinical observations are used to study trauma-induced immune suppression.

Purpose of the Study:

  • To correlate animal study results with clinical observations of postoperative immune suppression.
  • To analyze the characteristics of trauma-induced immune suppression.
  • To propose an updated sepsis classification based on immune status.

Main Methods:

  • A mouse model of surgically induced immune dysfunction (SID) involved laparotomy and small intestine manipulation.
  • Blood samples analyzed white blood cell count and corticosterone levels in mice.
  • Human subjects (118) had HLA-DR expression on monocytes analyzed via flow cytometry pre- and post-surgery.

Main Results:

  • The SID mouse model showed lymphocytopenia and increased corticosterone levels.
  • Surgically induced immune dysfunction in mice correlated with the degree of surgical trauma.
  • Human patients exhibited reduced HLA-DR expression on monocytes after major or long-lasting surgery.

Conclusions:

  • Postoperative immune suppression, characterized by reduced HLA-DR expression, is comparable across species and trauma types.
  • A new sepsis classification is proposed: Type A (spontaneous) and Type B (trauma-induced immune suppression).
  • Understanding immune status is crucial for classifying and potentially treating sepsis in trauma patients.