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Calandra, T. et al.

Calandra, Echtenacher, Roy, Pugin, Metz, Hültner, Heumann, Männel, Bucala, Glauser,

Protection from septic shock by neutralization of macrophage migration inhibitory factor.

Identification of new therapeutic targets for the management of septic shock remains imperative as all investigational therapies, including anti-tumor necrosis factor (TNF) and anti-interleukin (IL)-1 agents, have uniformly failed to lower the mortality of critically ill patients with severe sepsis. We report here that macrophage migration inhibitory factor ( MIF) is a critical mediator of septic shock. High concentrations of MIF were detected in the peritoneal exudate fluid and in the systemic circulation of mice with bacterial peritonitis. Experiments performed in TNFalpha knockout mice allowed a direct evaluation of the part played by MIF in sepsis in the absence of this pivotal cytokine of inflammation. Anti- MIF antibody protected TNFalpha knockout from lethal peritonitis induced by cecal ligation and puncture (CLP), providing evidence of an intrinsic contribution of MIF to the pathogenesis of sepsis. Anti- MIF antibody also protected normal mice from lethal peritonitis induced by both CLP and Escherichia coli, even when treatment was started up to 8 hours after CLP. Conversely, co-injection of recombinant MIF and E. coli markedly increased the lethality of peritonitis. Finally, high concentrations of MIF were detected in the plasma of patients with severe sepsis or septic shock. These studies define a critical part for MIF in the pathogenesis of septic shock and identify a new target for therapeutic intervention.[1]

References

Protection from septic shock by neutralization of macrophage migration inhibitory factor. Calandra, T., Echtenacher, B., Roy, D.L., Pugin, J., Metz, C.N., Hültner, L., Heumann, D., Männel, D., Bucala, R., Glauser, M.P. Nat. Med. (2000) [Pubmed]

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