Send to

Choose Destination
Eur J Immunol. 2008 Dec;38(12):3487-98. doi: 10.1002/eji.200838604.

Viral 5'-triphosphate RNA and non-CpG DNA aggravate autoimmunity and lupus nephritis via distinct TLR-independent immune responses.

Author information

Medical Policlinic, University of Munich, Germany.


Certain viral nucleic acids aggravate autoimmunity through nucleic acid-specific TLR. Viral 5'-triphosphate RNA (3P-RNA) and double-stranded non-CpG DNA induce antiviral immunity via TLR-independent pathways but their role in autoimmunity is unknown. Transient exposure of 16-wk-old MRL(lpr/lpr) mice to 3P-RNA aggravated lupus nephritis by increasing IFN signaling and decreasing CD4(+)CD25(+) T cells. By contrast, transient exposure to non-CpG DNA exacerbate lupus nephritis in association with splenomegaly, lymphoproliferation, hypergammaglobulinaemia and increased B220(+)CD138(+) plasma cells. Both, 3P-RNA and non-CpG DNA increased glomerular complement factor C3c deposits but both nucleic acid formats were less potent in aggravating renal pathology as compared with CpG DNA. 3P-RNA and non-CpG DNA also localized to the glomerular mesangial cells and activated cultured mesangial cells to produce IL-6. We conclude, 3P-RNA or non-CpG DNA both trigger autoimmune disease in MRL(lpr/lpr) mice by specifically activating adaptive immunity but similarly enhance inflammation on the tissue level.

[Indexed for MEDLINE]
Free full text

Supplemental Content

Full text links

Icon for Wiley
Loading ...
Support Center