Volume 56, Issue 5 pp. 1497-1506
Research Article

Presentation of arthritogenic peptide to antigen-specific T cells by fibroblast-like synoviocytes

Chinh N. Tran

Chinh N. Tran

University of Michigan Rheumatic Disease Core Center, Ann Arbor

University of Michigan Medical School, Ann Arbor

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Michael J. Davis

Michael J. Davis

University of Michigan Rheumatic Disease Core Center, Ann Arbor

University of Michigan Medical School, Ann Arbor

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Laura A. Tesmer

Laura A. Tesmer

University of Michigan Rheumatic Disease Core Center, Ann Arbor

University of Michigan Medical School, Ann Arbor

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Judith L. Endres

Judith L. Endres

University of Michigan Rheumatic Disease Core Center, Ann Arbor

University of Michigan Medical School, Ann Arbor

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Christopher D. Motyl

Christopher D. Motyl

University of Michigan Rheumatic Disease Core Center, Ann Arbor

University of Michigan Medical School, Ann Arbor

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Craig Smuda

Craig Smuda

University of Michigan Rheumatic Disease Core Center, Ann Arbor

University of Michigan Medical School, Ann Arbor

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Emily C. Somers

Emily C. Somers

University of Michigan Rheumatic Disease Core Center, Ann Arbor

University of Michigan Medical School, Ann Arbor

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Kevin C. Chung

Kevin C. Chung

University of Michigan Rheumatic Disease Core Center, Ann Arbor

University of Michigan Medical School, Ann Arbor

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Andrew G. Urquhart

Andrew G. Urquhart

University of Michigan Rheumatic Disease Core Center, Ann Arbor

University of Michigan Medical School, Ann Arbor

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Steven K. Lundy

Steven K. Lundy

University of Michigan Rheumatic Disease Core Center, Ann Arbor

University of Michigan Medical School, Ann Arbor

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Susan Kovats

Susan Kovats

Beckman Research Institute, Duarte, California

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David A. Fox

Corresponding Author

David A. Fox

University of Michigan Rheumatic Disease Core Center, Ann Arbor

University of Michigan Medical School, Ann Arbor

University of Michigan, Room 3918 Taubman Center, 1500 East Medical Center Drive, Ann Arbor, MI 48109-0358Search for more papers by this author
First published: 27 April 2007
Citations: 88

Abstract

Objective

To assess the ability of rheumatoid arthritis (RA) fibroblast-like synoviocytes (FLS) to function as antigen-presenting cells (APCs) for arthritogenic autoantigens found within inflamed joint tissues.

Methods

Human class II major histocompatibility complex (MHC)–typed FLS were used as APCs for murine class II MHC–restricted CD4 T cell hybridomas. Interferon-γ (IFNγ)–treated, antigen-loaded FLS were cocultured with T cell hybridomas specific for immunodominant portions of human cartilage gp-39 (HC gp-39) or human type II collagen (CII). T cell hybridoma activation was measured by enzyme-linked immunosorbent assay of culture supernatants for interleukin-2. Both synthetic peptide and synovial fluid (SF) were used as sources of antigen. APC function in cocultures was inhibited by using blocking antibodies to human class II MHC, CD54, or CD58, or to murine CD4, CD11a, or CD2.

Results

Human FLS could present peptides from the autoantigens HC gp-39 and human CII to antigen-specific MHC-restricted T cell hybridomas. This response required pretreatment of FLS with IFNγ, showed MHC restriction, and was dependent on human class II MHC and murine CD4 for effective antigen presentation. Furthermore, FLS were able to extract and present antigens found within human SF to both the HC gp-39 and human CII T cell hybridomas in an IFNγ-dependent and MHC-restricted manner.

Conclusion

RA FLS can function as APCs and are able to present peptides derived from autoantigens found within joint tissues to activated T cells in vitro. In the context of inflamed synovial tissues, FLS may be an important and hitherto overlooked subset of APCs that could contribute to autoreactive immune responses.

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