Inducible co-stimulator null MRL-Faslpr mice: Uncoupling of autoantibodies and T cell responses in lupus

Geraldine C. Zeller, Junichi Hirahashi, Andreas Schwarting, Arlene H. Sharpe, Vicki Rubin Kelley

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

MRL/MpJ-Tnfrsf6lpr (MRL-Faslpr) mice develop a spontaneous T cell-dependent autoimmune disease that shares features with human lupus, including fatal nephritis, systemic pathology, and autoantibodies (autoAb). The inducible co-stimulator (ICOS) is upregulated on activated T cells and modulates T cell-mediated responses. To investigate whether ICOS has an essential role in regulating autoimmune lupus nephritis and the systemic illness in MRL-Faslpr mice, ICOS null (-/-) MRL Faslpr and ICOS intact (+/+) MRL-Faslpr strains (wild-type [WT]) were generated and compared. It was determined that in ICOS-/- MRL-Faslpr as compared with the WT strain, (1) there is a significant reduction in circulating IgG and double-stranded DNA autoantibody isotype titers, and (2) there is an amplification of the frequency of intrarenal T cells generating IFN-γ and TNF-α in ICOS-/- versus WT mice. Of note, eliminating ICOS in the MRL-Faslpr strain does not alter renal pathology or function. Despite the reduction in circulating IgG and autoantibody isotypes (G1, G2a, and G2b), the amount of these IgG isotypes depositing in kidneys is similar. Furthermore, the systemic illness (skin, salivary and lacrimal glands, lungs, lymphadenopathy, and splenomegaly) is equivalent in ICOS-/- MRL-Fas lpr and WT mice. These findings highlight the danger of relying on individual parameters, such as quantitative serum Ig levels and T cell functions, as prognostic indicators of lupus.

Original languageEnglish
Pages (from-to)122-130
Number of pages9
JournalJournal of the American Society of Nephrology
Volume17
Issue number1
DOIs
Publication statusPublished - 2006 Jan
Externally publishedYes

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Inducible T-Cell Co-Stimulator Protein
Autoantibodies
T-Lymphocytes
Immunoglobulin G
Pathology
Kidney
Lacrimal Apparatus
Lupus Nephritis
Nephritis
Splenomegaly
Salivary Glands
Autoimmune Diseases

ASJC Scopus subject areas

  • Nephrology

Cite this

Inducible co-stimulator null MRL-Faslpr mice : Uncoupling of autoantibodies and T cell responses in lupus. / Zeller, Geraldine C.; Hirahashi, Junichi; Schwarting, Andreas; Sharpe, Arlene H.; Kelley, Vicki Rubin.

In: Journal of the American Society of Nephrology, Vol. 17, No. 1, 01.2006, p. 122-130.

Research output: Contribution to journalArticle

Zeller, Geraldine C. ; Hirahashi, Junichi ; Schwarting, Andreas ; Sharpe, Arlene H. ; Kelley, Vicki Rubin. / Inducible co-stimulator null MRL-Faslpr mice : Uncoupling of autoantibodies and T cell responses in lupus. In: Journal of the American Society of Nephrology. 2006 ; Vol. 17, No. 1. pp. 122-130.
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