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Zwijnenburg, P.J. et al.

Petra J. G. Zwijnenburg, Tom van der Poll, Sandrine Florquin, Machteld M. J. Polfliet, Timo K. van den Berg, Christine D. Dijkstra, John J. Roord, C. Erik Hack, A. Marceline van Furth,

C1 inhibitor treatment improves host defense in pneumococcal meningitis in rats and mice.

In spite of antibiotic treatment, pneumococcal meningitis continues to be associated with significant morbidity and mortality. The complement system is a key component of innate immunity against invading pathogens. However, activation of complement is also involved in tissue damage, and complement inhibition by C1 inhibitor (C1-inh) is beneficial in animal models of endotoxemia and sepsis. In the present study, we demonstrate classical pathway complement activation during pneumococcal meningitis in rats. We also evaluate the effect of C1-inh treatment on clinical illness, bacterial clearance, and inflammatory responses in rats and mice with pneumococcal meningitis. C1-inh treatment was associated with reduced clinical illness, a less-pronounced inflammatory infiltrate around the meninges, and lower brain levels of proinflammatory cytokines and chemokines. C1-inh treatment increased bacterial clearance, possibly through an up-regulation of CR3. Hence, C1-inh may be a useful agent in the treatment of pneumococcal meningitis.[1]

References

C1 inhibitor treatment improves host defense in pneumococcal meningitis in rats and mice. Zwijnenburg, P.J., van der Poll, T., Florquin, S., Polfliet, M.M., van den Berg, T.K., Dijkstra, C.D., Roord, J.J., Hack, C.E., van Furth, A.M. J. Infect. Dis. (2007) [Pubmed]

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