Netea MG, Kullberg BJ, van der Meer JW. Lipopolysaccharide-induced production of tumour necrosis factor and interleukin-1 is differentially regulated at the receptor level: the role of CD14-dependent and CD14-independent pathways.
Immunol Suppl 1998;
94:340-4. [PMID:
9767415 PMCID:
PMC1364251 DOI:
10.1046/j.1365-2567.1998.00532.x]
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Abstract
Cytokine production induced via CD14-dependent and CD14-independent pathways was investigated in mouse peritoneal macrophages incubated with lipopolysaccharide (LPS) or lipid A. Different LPS receptors appear to be responsible for production of tumour necrosis factor-alpha (TNF-alpha) and interleukin-1 alpha (IL-1 alpha) and IL-1 beta. TNF-alpha production is essentially CD14 dependent, both in the presence or absence of plasma. In the presence of plasma, endotoxin-induced IL-1 production is mediated by CD14-dependent mechanisms, while in its absence both CD14-dependent and CD14-independent pathways are involved. Lipid A stimulates cytokine synthesis through both CD14-dependent and CD14-independent mechanisms, but its action is weaker than that of LPS, indicating that the polysaccharide moiety may be necessary for proper stimulation of mouse macrophages by endotoxin.
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