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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

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Schultz, M.J. et al.

Schultz, Olszyna, de Jonge, Verbon, van Deventer, van der Poll,

Reduced ex vivo chemokine production by polymorphonuclear cells after in vivo exposure of normal humans to endotoxin.

Monocytes from patients with sepsis have a reduced capacity to produce cytokines, a state referred to as immunoparalysis. To determine whether polymorphonuclear leukocytes (PMNL) can be rendered hyporesponsive, PMNL from 6 healthy volunteers intravenously challenged with lipopolysaccharide (LPS; 4 ng/kg) were stimulated ex vivo with heat-killed bacteria or LPS, and the release of the CXC chemokines interleukin-8, epithelial-derived neutrophil attractant-78, and growth-related oncogen-alpha was measured. At 1 and 2 h after LPS administration in vivo, PMNL produced fewer CXC chemokines after stimulation with bacteria or LPS (all P<.05). Serum obtained 2 h after in vivo administration of LPS did not influence chemokine production by PMNL from 6 healthy volunteers not previously exposed to LPS. Thus, intravenous injection of LPS induces a refractory state of PMNL that is not caused by soluble factors produced in response to in vivo exposure to LPS.[1]

References

Reduced ex vivo chemokine production by polymorphonuclear cells after in vivo exposure of normal humans to endotoxin. Schultz, M.J., Olszyna, D.P., de Jonge, E., Verbon, A., van Deventer, S.J., van der Poll, T. J. Infect. Dis. (2000) [Pubmed]

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