PMID: 11901317Mar 20, 2002Paper

Activated polymorphonuclear leukocytes enhance production of leukocyte microparticles with increased adhesion molecules in patients with sepsis

The Journal of Trauma
Satoshi FujimiHisashi Sugimoto

Abstract

Leukocyte microparticles (MPs) derived from polymorphonuclear leukocytes (PMNLs) have been recently found to be activators of vascular endothelium in vitro. The precise role of leukocyte MPs has not been clarified in patients suffering severe insult. The objective of this study was to evaluate production of leukocyte MPs and expression of adhesion molecules on the MP surface in patients with sepsis. Twenty-one patients with severe infection (fulfilling the criteria of sepsis with serum C-reactive protein > 10 mg/dL) and 21 healthy volunteers were included as study subjects. Production of leukocyte MPs, expression of CD11b on the MPs, and oxidative activity of PMNLs were measured by flow cytometry in the presence and absence of formyl-methionyl-leucyl-phenylalanine. CD11b expression was evaluated according to the MP size (more than, equal to, or less than 1.0 microm). Soluble E-selectin, thrombomodulin, and PMNL elastase were also measured in blood. Production of leukocyte MPs and superoxide production in PMNLs with and without formyl-methionyl-leucyl-phenylalanine increased significantly in patients with sepsis in comparison with production in normal volunteers. In patients with sepsis, expression of CD11b was also markedly enh...Continue Reading

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