Glucose-6-phosphate isomerase is not a specific autoantigen in rheumatoid arthritis.
OBJECTIVE: To test the hypothesis that glucose-6-phosphate isomerase (GPI) is a novel autoantigen in RA. METHODS: Eighty-eight serum samples from 23 patients with rheumatoid arthritis (RA), 25 with Sjögren's syndrome, 20 with systemic lupus erythematosus and 20 healthy controls were tested by enzyme-linked immunosorbent assay (ELISA) using a commercially available, partially purified rabbit GPI as antigen. Beside each duplicate well containing antigen (10 micro g/ml), uncoated blocked duplica...Expand abstract
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