Antibodies to Human Cytomegalovirus 65-Kilodalton Fc Binding Protein in Rheumatoid Arthritis: Idiotypic Mimicry Hypothesis of Rheumatoid Factor Production
| Autor: | Koji Ito, Kunio Matsuta, Tom Furukawa, Michiko Shiota, Sadayoshi Yoshinoya, Tsugiya Murayama, Naoyuki Tsuchiya |
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| Rok vydání: | 1993 |
| Předmět: |
Adult
Male Idiotype Human cytomegalovirus Adolescent medicine.drug_class viruses Immunology Cytomegalovirus Receptors Fc Antibodies Viral Monoclonal antibody Models Biological Arthritis Rheumatoid Immunoglobulin Fab Fragments Viral Envelope Proteins Antigen Rheumatoid Factor Heat shock protein Osteoarthritis Synovial Fluid Humans Immunology and Allergy Medicine Rheumatoid factor Synovial fluid Heat-Shock Proteins Aged Aged 80 and over biology business.industry Middle Aged medicine.disease Antibodies Anti-Idiotypic Immunoglobulin Fc Fragments Immunoglobulin G biology.protein Female Antibody business |
| Zdroj: | Autoimmunity. 15:39-48 |
| ISSN: | 1607-842X 0891-6934 |
| Popis: | We previously reported that rheumatoid factors (RFs) might bear the internal image of Fc gamma-binding proteins (FcBPs) of herpes family viruses, suggesting the possibility that some RFs may be produced as antiidiotypic antibodies to anti-viral FcBP antibodies. Since human cytomegalovirus (HCMV) has been implicated in the pathogenesis of RA, we made an attempt to detect antibodies to 65 KD major HCMV FcBP in sera and synovial fluid from patients with RA. Western blotting was performed using HCMV-infected MRC-5 cell lysate as the antigen. Eleven of 23 patients with RA possessed strong serum antibodies to HCMV-65 KD protein, whereas such antibodies were found in only 2 of 23 normal controls. In the synovial fluid, 10 of 19 RA patients showed anti-HCMV 65 KD reactivity. Pepsin-digested IgG retained anti-65 KD reactivity, indicating that false-positive reaction due to the presence of IgG Fc portion and/or RF was unlikely. 65 KD protein was shown to be different from human heat shock proteins (hsps) using monoclonal antibodies against human hsps. Patients' IgG F(ab')2 also reacted with the 65 KD protein of purified HCMV virion itself. These results support the possibility that some RFs could be produced as antiidiotypic antibodies to anti-viral FcBP antibodies. |
| Databáze: | OpenAIRE |
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