Volume 40, Issue 12 pp. 2162-2171
Article
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Histone-specific Th0 and Th1 clones derived from systemic lupus erythematosus patients induce double-stranded DNA antibody production

Reinhard E. Voll MD

Reinhard E. Voll MD

Friedrich-Alexander-University, Erlangen, Germany

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Edith A. Roth

Edith A. Roth

Friedrich-Alexander-University, Erlangen, Germany

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Irute Girkontaite PhD

Irute Girkontaite PhD

Friedrich-Alexander-University, Erlangen, Germany

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Holger Fehr

Holger Fehr

Friedrich-Alexander-University, Erlangen, Germany

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Martin Herrmann PhD

Martin Herrmann PhD

Friedrich-Alexander-University, Erlangen, Germany

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Hanns-Martin Lorenz MD

Hanns-Martin Lorenz MD

Friedrich-Alexander-University, Erlangen, Germany

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Joachim R. Kalden MD

Corresponding Author

Joachim R. Kalden MD

Friedrich-Alexander-University, Erlangen, Germany

Director, Department of Internal Medicine III, Krankenhausstrasse 12, 91054 Erlangen, GermanySearch for more papers by this author
First published: 12 December 2005
Citations: 119

Abstract

Objective. To investigate whether histone-specific T helper (Th) cells that are able to induce anti-doublestranded DNA (anti-dsDNA) antibodies can be isolated from patients with systemic lupus erythematosus (SLE) and to characterize the cytokine secretion pattern of such Th clones.

Methods. Peripheral blood mononuclear cells from SLE patients and healthy donors were stimulated with autologous apoptotic cell material or purified histones, expanded with interleukin-2 (IL-2), and cloned by limiting dilution. Histone reactivity of clones was examined by histone-specific proliferation and cytokine release. Cytokines were determined by enzyme-linked immunosorbent assay (ELISA) and CTLL-2 bioassay. Induction of anti-dsDNA antibodies was measured in cocultures of autologous B cells and Th clones by ELISA.

Results. Numerous histone-specific T cell receptor (TCR) α/β+ Th clones were established from 2 of 3 patients with active SLE and from 1 of 2 healthy individuals. Most Th clones secreted IL-2, interferon-γ (IFNγ), and IL-4, whereas some produced predominantly IL-2 and lFNγ. Th clones that could stimulate the production of anti-dsDNA antibodies were derived from SLE patients and from a healthy individual.

Conclusion. Th cells specific for histones may play an important role in the pathogenesis of SLE by inducing autoantibodies to dsDNA. Both Th1 and Th2 cytokines may be involved in the pathogenesis of SLE. The presence of histone-specific Th cells in a healthy individual indicates the importance of peripheral tolerance for preventing autoimmunity to nuclear antigens.

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