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

F.N. Lauw, A.J.H. Simpson, C.E. Hack, J.M. Prins, A.M. Wolbink, S.J.H. van Deventer, W. Chaowagul, N.J. White, T. van der Poll

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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
Original languageUndefined/Unknown
Pages (from-to)206-213
JournalThe Journal of Infectious Diseases
Issue number1
Publication statusPublished - 2000


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