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    Arthritis Rheum. 1997 Sep;40(9):1693-702.

    Molecular cloning of a novel 97-kd Golgi complex autoantigen associated with Sjögren's syndrome.

    Griffith KJ, Chan EK, Lung CC, Hamel JC, Guo X, Miyachi K, Fritzler MJ.

    Source

    University of Calgary, Alberta, Canada.

    Abstract

    OBJECTIVE:

    To identify a Golgi complex autoantigen bound by Sjögren's syndrome (SS) autoantibodies.

    METHODS:

    Serum from a patient with secondary SS and anti-Golgi antibodies was used as a probe to isolate a complementary DNA (cDNA) insert from a HeLa cDNA library.

    RESULTS:

    A 3.7-kb cDNA encoding a 56-kd recombinant protein was immunoprecipitated by the human anti-Golgi serum and immune rabbit serum. Western blot analysis showed that the immune rabbit sera recognized a protein of 97 kd (golgin-97), suggesting that the isolated clone contained a partial cDNA. The 5' upstream sequence was obtained by rapid amplification of the cDNA ends. The complete cDNA contained 4,860 basepairs, encoding a protein with a calculated Mr of 88 kd. Antibodies to golgin-97 were found in 12 (20%) of 60 sera known to have anti-Golgi autoantibodies, and the majority of these sera (8 of 12, or 75%) were from patients who had secondary SS.

    CONCLUSION:

    Golgin-97 is a unique Golgi complex antigen that appears to be a target of SS autoantibodies.

    PMID:
    9324025
    [PubMed - indexed for MEDLINE]

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