Clin Immunol Immunopathol. 1990 Feb;54(2):266-80.

Expression of autoantibodies to recombinant (U1) RNP-associated 70K antigen in systemic lupus erythematosus.

St Clair EW, Query CC, Bentley R, Keene JD, Polisson RP, Allen NB, Caldwell DS, Rice JR, Cox C, Pisetsky DS.

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Department of Medicine, Duke University Medical Center, Durham, North Carolina.

Abstract

To determine the specificity of antibodies to the (U1) ribonucleoprotein antigen in systemic lupus erythematosus (SLE), patient sera were tested for binding to a recombinant human 70K antigen. By solid-phase immunoassay, we detected anti-70K reactivity in sera from 31 of 96 patients with systemic lupus erythematosus (SLE), demonstrating that anti-70K antibodies may occur in patients with SLE as well as other clinical diagnoses. In sequential sera from 2 of these patients, we found that anti-70K binding varied dramatically over the course of disease. The changes in anti-70K antibody levels did not correlate with clinical events nor evolving antibody reactivity with the Sm-specific antigens.

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Expression of autoantibodies to recombinant (U1) RNP-associated 70K antigen in systemic lupus erythematosus.

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