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Injury. 2005 Aug;36(8):956-62.

Enhanced neutrophil migratory activity following major blunt trauma.

Author information

1
Department of Trauma & Orthopaedics, University Hospital for Wales, Heath Park, Cardiff, CF14 4XN, UK. raj1bhatia@hotmail.com

Abstract

BACKGROUND:

Neutrophil migration into the lung is a critical, but poorly understood step in the pathogenesis of post-traumatic, acute respiratory distress syndrome (ARDS). We investigated changes in interleukin-8 (IL-8) mediated neutrophil migration and associated changes in receptor expression, of the IL-8 receptors CXCR1, the integrins CD11b/CD18 and platelet endothelial cell adhesion molecule-1 (PECAM-1) in patients sustaining major trauma.

METHODS:

Eleven patients with major trauma, injury severity score (ISS), median 22 (range 18-41), were followed prospectively. Eleven normal volunteers were used as controls. Blood samples were obtained within 4+/-2 h of injury, at 24 h, day 3 and day 5. Neutrophils migration was assessed by an in vitro IL-8 assay and neutrophil surface receptor expression by FACS analysis.

RESULTS:

IL-8 mediated neutrophil migration was significantly increased on admission following major trauma and remained elevated for 3 days (p<0.05). This was associated with up-regulation of CXCR1 (p<0.01) and down-regulation of PECAM-1 (p<0.05). CD11b and CD18 although initially unchanged, became down-regulated on day 3 (p<0.05).

CONCLUSIONS:

These data show that major trauma primes circulating neutrophils for increased migration in response to IL-8. This response is sustained for 72 h and is associated with changes in neutrophil surface receptor expression.

PMID:
15998513
DOI:
10.1016/j.injury.2005.03.009
[Indexed for MEDLINE]

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