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Antimicrobial Agents and Chemotherapy, 06 1996, 1366-1370, Vol 40, No. 6
K Morikawa, H Watabe, M Araake and S Morikawa
Some antimicrobial agents have been reported to modify the host immune and
inflammatory responses both in vivo and in vitro. Fosfomycin (FOM) and
clarithromycin (CAM) have immunomodulatory activity on human lymphocyte
function. In the present study, we examined the effects of FOM and CAM on
cytokine synthesis by lipopolysaccharide (LPS)- stimulated human monocytes
in comparison with that of dexamethasone in vitro. The three drugs
demonstrated positive or negative effects on the synthesis of various
cytokines by LPS-primed monocytes. They suppressed the synthesis of tumor
necrosis factor alpha, interleukin 1 alpha (IL-1 alpha), IL-1 beta, the
IL-1 receptor antagonist, and granulocyte- macrophage colony-stimulating
factor in a concentration-dependent manner at concentrations between 1.6
and 40 micrograms/ml. On the contrary, the drugs showed different actions
on the synthesis of IL-6 and IL-10. Namely, FOM enhanced both IL-6 and
IL-10 synthesis, CAM enhanced only IL-10 synthesis, but dexamethasone
deeply suppressed the synthesis of both cytokines. These data indicate that
antibacterial agents may modify acute-phase inflammatory responses through
their effects on cytokine synthesis by monocytes.
Copyright © 1996 by the American Society for Microbiology. All rights reserved.
Modulatory effect of antibiotics on cytokine production by human monocytes in vitro
Department of Internal Medicine, Shimane Medical University, Japan.
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