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Rheumatology Advance Access originally published online on February 28, 2003
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Rheumatology 2003; 42: 563-569
© 2003 British Society for Rheumatology

Response of peripheral blood mononuclear cells from lupus patients to stimulation by CpG oligodeoxynucleotides

R. A. Zeuner1,3, D. M. Klinman1,, G. Illei2, C. Yarboro2, K. J. Ishii1, M. Gursel1 and D. Verthelyi1

1 Center for Biologics Evaluation and Research/Food and Drug Administration, Bethesda, Maryland, USA,
2 NIAMS, National Institutes of Health, Bethesda, Maryland, USA and
3 II. Medical Clinic, University of Kiel, Germany

Objectives. Increased levels of hypomethylated CpG-containing DNA in sera from patients with systemic lupus erythematosus (SLE) may contribute to the initiation and/or perpetuation of the disease. This study characterizes the in vitro response of peripheral blood mononuclear cells (PBMC) from SLE patients to CpG DNA.

Methods. Secretion of cytokines and IgM, cell proliferation and up-regulation of co-stimulatory molecules were evaluated in PBMC from SLE patients (n=24) and normal controls (n=24) after stimulation with synthetic oligodeoxynucleotides (ODN) containing CpG motifs.

Results. Up-regulation of co-stimulatory molecules and the secretion of interferon-{alpha} and interleukin-6 (IL-6) in response to CpG ODN was significantly reduced in monocytes and dendritic cells from SLE patients. Secretion of interferon-{gamma} by natural killer (NK) cells was also reduced. In contrast, the IgM and IL-10 response of B cells to CpG ODN was normal.

Conclusion. Monocytes, dendritic cells and NK cells from SLE patients respond abnormally to CpG ODN stimulation, which may contribute to the cytokine imbalance observed in SLE.

KEY WORDS: SLE, Innate immune system, CpG oligodeoxynucleotide, Toll-like receptor, Dendritic cells.

Correspondence to: D. M. Klinman, Section of Retroviral Research, Center for Biologics Evaluation and Research (CBER), Food and Drug Administration, Bldg 29A, Room 3D10, Bethesda, Maryland 20892, USA. E-mail: klinman{at}cber.fda.gov


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[Abstract] [PDF]


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