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- W4313377006 abstract "Abstract Recent in vitro studies have suggested that CD14, a major receptor for LPS, may also be a receptor for cell wall components of Gram-positive bacteria and thus play a role in Gram-positive shock. To analyze the in vivo role of CD14 in responses to Gram-positive bacteria, CD14-deficient and control mice were injected with Staphylococcus aureus, and the effects on lethality, bacterial clearance, and production of cytokines were analyzed. Survival of CD14-deficient and control mice did not differ significantly after administration of various doses of either unencapsulated or encapsulated S. aureus; furthermore, mice in both groups displayed similar symptoms of shock. In addition, inflammatory cytokines such as TNF-α and IL-6 were readily detectable in the serum of CD14-deficient mice injected with live or antibiotic-killed S. aureus. Surprisingly, the serum concentration of TNF-α in CD14-deficient mice was at least threefold higher than in control mice after injection of either unencapsulated or encapsulated S. aureus, suggesting that CD14 down-regulates TNF-α. A similar increase in serum TNF-α occurred when CD14-deficient animals were injected with gentamicin-killed bacteria even though no symptoms of shock were observed. These studies indicate that CD14, in contrast to its key function in responses to the Gram-negative bacterium, Escherichia coli 0111, does not play a prominent role in septic shock induced by S. aureus, and that the symptoms of S. aureus shock are not due solely to TNF-α." @default.
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- W4313377006 date "1999-04-15" @default.
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- W4313377006 title "CD14 Plays No Major Role in Shock Induced by <i>Staphylococcus aureus</i> but Down-Regulates TNF-α Production" @default.
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- W4313377006 doi "https://doi.org/10.4049/jimmunol.162.8.4801" @default.
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