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  • Title: Autoantibody production against the U small nuclear ribonucleoprotein particle proteins E, F and G in patients with connective tissue diseases.
    Author: Reuter R, Rothe S, Habets W, Van Venrooij WJ, Lührmann R.
    Journal: Eur J Immunol; 1990 Feb; 20(2):437-40. PubMed ID: 2138085.
    Abstract:
    The nucleoplasmic U small nuclear ribonucleoprotein particles (snRNP) have a set of seven proteins in common which are designated B', B, D, D', E, F and G. Patients suffering from rheumatoid autoimmune diseases such as systemic lupus erythematosus often develop autoantibodies against the proteins B', B, and D. Here we describe a sensitive immunoassay which allows the specific detection of autoantibodies reacting with the E, F or G snRNP proteins. We were able to identify several patient sera containing autoantibodies against one or more of these proteins. This demonstrates that all snRNP proteins described so far are potentially antigenic in systemic rheumatoid diseases. The characterization of the antibodies showed an immunological cross-reactivity between the snRNP protein G and the 70-kDa protein of U1 snRNP. Several sera contained autoantibodies which were specific for the F snRNP protein.
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