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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

CpG-DNA upregulates the major acute-phase proteins SAA and SAP.

The acute-phase response is an immediate reaction of the host against invading microorganisms. We show here that oligodeoxynucleotides (ODNs) containing a CpG motif rapidly induce the major murine acute-phase proteins in vivo, i.e. serum amyloid A (SAA) and serum amyloid P (SAP). Serum levels of these proteins are elevated within 12 h and peak at 24 h after the injection of CpG-ODN or endotoxin. Liver cells produce the proteins with the same kinetics. Injection of interleukin 6 (IL-6), IL-1beta and tumour necrosis factor alpha (TNF-alpha) induces SAA and SAP in vivo, but the CpG-ODN-mediated induction does not depend on the presence of the TNF receptor p55, as the acute-phase response in TNF receptor p55-deficient mice does not differ from that of wild-type mice. Aside from CpG-ODN, bacterial genomic DNA also induces the acute-phase response in LPS-resistant C3H/Hej mice. The induction of the major acute-phase proteins SAA and SAP is blocked by the simultaneous injection of CpG-ODN together with D-galactosamine (D-GalN). As D-GalN sensitizes the host for the toxic effects of TNF-alpha, a possible mechanism could be the prevention of synthesis of the major acute-phase proteins SAA and SAP.[1]


  1. CpG-DNA upregulates the major acute-phase proteins SAA and SAP. Schmidt, U., Wagner, H., Miethke, T. Cell. Microbiol. (1999) [Pubmed]
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