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Mice with FIA develop anti-native and anti-in vitro citrullinated fibrinogen antibodies


ABSTRACT: Synovial antigen arrays were probed with 1:150 dilutions of plasma derived from SJL mice immunized with fibrinogen emulsified in CFA or with CFA alone. Autoantibody binding was detected with a Cy3-conjugated goat-anti-mouse IgG/M secondary antibody. SAM was applied to identify antigens with statistically significant differences in array reactivity between FIA and CFA control plasma (q < 0.01) obtained from mice before boosting. The SAM hits were subjected to hierarchical cluster analysis and are displayed as a heatmap. Synovial array profiling of FIA plasma demonstrated autoreactive B-cell responses against peptides representing native fibrinogen, and B-cell epitope spreading resulting in additional targeting of citrullinated fibrinogen in the samples obtained before boosting. Custom-spotted protein slides were probed with plasma samples from individual mice. Four slides were probed with plasma derived from mice immunized with CFA and six slides were probed with plasma derived from mice immunized with fibrinogen emulsified in CFA.

ORGANISM(S): Mus musculus

SUBMITTER: Ricardo Paniagua 

PROVIDER: E-GEOD-18023 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Autoimmunity against fibrinogen mediates inflammatory arthritis in mice.

Ho Peggy P PP   Lee Lowen Y LY   Zhao Xiaoyan X   Tomooka Beren H BH   Paniagua Ricardo T RT   Sharpe Orr O   BenBarak Maya J MJ   Chandra Piyanka E PE   Hueber Wolfgang W   Steinman Lawrence L   Robinson William H WH  

Journal of immunology (Baltimore, Md. : 1950) 20091130 1


Rheumatoid arthritis (RA) is an autoimmune synovitis characterized by the presence of anticitrullinated protein Abs, although the exact targets and role of anticitrullinated protein autoimmunity in the pathogenesis of RA remain to be defined. Fibrinogen, which can be citrullinated, has recently emerged as a candidate autoantigen. To determine whether autoimmunity against fibrinogen can mediate inflammatory arthritis, we immunized a variety of common mouse strains with fibrinogen and found that D  ...[more]

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