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Autoantibodies to the epidermal growth factor receptor in systemic sclerosis, lupus, and autoimmune mice
Author(s) -
Planque Stephanie,
Zhou YongXin,
Nishiyama Yasuhiro,
Sinha Meenal,
O'ConnorMcCourt Maureen,
Arnett Frank C.,
Paul Sudhir
Publication year - 2003
Publication title -
the faseb journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.709
H-Index - 277
eISSN - 1530-6860
pISSN - 0892-6638
DOI - 10.1096/fj.01-0847com
Subject(s) - autoantibody , immunology , systemic lupus erythematosus , epitope , autoimmune disease , recombinant dna , antibody , microbiology and biotechnology , medicine , biology , disease , biochemistry , gene
Autoantibodies to the recombinant extracellular domain of epidermal growth factor receptor (exEGFR) were detected by ELISA in the serum of Fas‐defective old MRL/MpJ/lpr and C3H/HeJ/gld mice, but not young mice from these strains, or nonautoimmune young and old BALB/c, MRL/MpJ/++, and C3H/HeJ/MMTV mice. Compared with control human subjects without autoimmune disease, the frequency of exEGFR‐binding autoantibodies was increased in scleroderma (systemic sclerosis) patients and to a lesser extent in lupus patients. Phage autoantibodies (Fv fragments) isolated from a lupus library by selection on a linear epitope of EGFR (residues 294–310) displayed the ability to bind exEGFR. Treatment of EGFR‐expressing A431 cells with autoantibodies purified by affinity chromatography on immobilized exEGFR resulted in specific staining of the cells. Shortlived but strong inhibition of cellular DNA synthesis was observed in the presence of the autoantibodies. We concluded that autoantibody responses to EGFR hold the potential of fulfilling a pathogenic role in autoimmune disease.—Planque, S., Zhou, Y.‐X., Nishiyama, Y., Sinha, M., O'Connor‐McCourt, M., Arnett, F.C., Paul, S. Autoantibodies to the epidermal growth factor receptor in systemic sclerosis, lupus, and autoimmune mice. FASEB J . 17, 136–143 (2003)