Soluble granzymes are released during human endotoxemia and in patients with severe infection due to gram-negative bacteria - PubMed (original) (raw)

. 2000 Jul;182(1):206-13.

doi: 10.1086/315642. Epub 2000 Jul 6.

Affiliations

• PMID: 10882599
• DOI: 10.1086/315642

Soluble granzymes are released during human endotoxemia and in patients with severe infection due to gram-negative bacteria

F N Lauw et al. J Infect Dis. 2000 Jul.

Abstract

Extracellular release of granzymes is considered to reflect the involvement of cytotoxic T lymphocytes and NK cells in various disease states. To obtain insight into granzyme release during bacterial infection, granzyme levels were measured during experimental human endotoxemia and in patients with melioidosis, a severe infection due to gram-negative bacteria. Plasma concentrations of granzyme A (GrA) and GrB increased transiently after endotoxin administration, peaking after 2-6 h. In patients with bacteremic melioidosis, GrA and GrB levels were elevated on admission and remained high during the 72-h study period. In whole blood stimulated with heat-killed Burkholderia pseudomallei, neutralization of tumor necrosis factor, interleukin-12, or interleukin-18 inhibited granzyme secretion, which was independent of interferon-gamma. Stimulation with endotoxin and other gram-negative and gram-positive bacteria also strongly induced the secretion of granzymes, suggesting that granzyme release is a general immune response during bacterial infection. The interaction between the cytokine network and granzymes may play an important immunoregulatory role during bacterial infections.

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