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Related Experiment Videos

Lymphocyte activation after non-thermal trauma.

D S Walsh1, P Siritongtaworn, K Pattanapanyasat

  • 1Department of Immunology and Medicine, US Army Medical Component, Armed Forces Research Institute of Medical Sciences, APO, AP 96546-5000, USA.

The British Journal of Surgery
|February 15, 2000
PubMed
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Severe injury significantly alters lymphocyte profiles and activation markers. Soluble factors like sCD4 and sIL-2R correlate with clinical outcomes, offering insights into post-injury immune responses.

Area of Science:

  • Immunology
  • Trauma Research
  • Clinical Medicine

Background:

  • Severe injuries trigger significant immunological changes, potentially impacting patient outcomes.
  • Understanding longitudinal lymphocyte response patterns is crucial for elucidating these immune alterations.

Purpose of the Study:

  • To characterize lymphocyte phenotypic and activation markers in patients with severe injuries.
  • To assess serum levels of key cytokines and soluble receptors.
  • To investigate the correlation between lymphocyte profiles, soluble factors, and clinical course.

Main Methods:

  • Collected venous blood from 61 severely injured patients over 2 weeks.
  • Assessed lymphocyte phenotypic and activation markers.
  • Measured serum levels of IL-2, IL-4, sIL-2R, sCD4, sCD8, and interferon gamma.

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Main Results:

  • Severe injury induced profound changes in circulating lymphocyte phenotype and activation.
  • Increased T cells expressing CD25, CD69, CD71, and elevated IL-2, sIL-2R, sCD4, sCD8 serum levels were observed.
  • Higher sIL-2R and sCD4 levels were noted in patients who developed sepsis syndrome.

Conclusions:

  • Polytrauma causes significant alterations in lymphocyte profiles, largely independent of clinical course.
  • Certain soluble lymphocyte factors, specifically sCD4 and sIL-2R, paralleled the clinical course.
  • Further research into soluble factors as clinical correlates for lymphocyte activation and inflammation is warranted.