{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,1]],"date-time":"2025-10-01T16:32:48Z","timestamp":1759336368823,"version":"3.37.3"},"reference-count":40,"publisher":"Oxford University Press (OUP)","issue":"5","license":[{"start":{"date-parts":[[2009,5,1]],"date-time":"2009-05-01T00:00:00Z","timestamp":1241136000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/academic.oup.com\/journals\/pages\/open_access\/funder_policies\/chorus\/standard_publication_model"}],"funder":[{"DOI":"10.13039\/100011110","name":"UCB","doi-asserted-by":"publisher","id":[{"id":"10.13039\/100011110","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2009,5,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Background: Serum samples from patients with autoimmune connective tissue diseases that show a finely speckled antinuclear antibody (ANA) on indirect immune-fluorescence often have antibodies against unknown nuclear target antigens. To search for such autoantigens we applied a proteomic approach using sera from patients with a high ANA titer (\u2265640) and finely speckled fluorescence but in whom no antibodies to extractable nuclear antigens (ENA) could be identified.<\/jats:p><jats:p>Methods: Using an immunoproteomics approach we identified heterogeneous nuclear ribonucleoprotein H1 (hnRNP H1) as a novel nuclear target of autoantibody response.<\/jats:p><jats:p>Results: Recombinant rat hnRNP H1 reacted in Western blot analyses with 48% of 93 sera from patients with primary Sjo\u0308gren syndrome and with 5.2% of 153 sera from patients with other connective tissue diseases (diseased controls). For comparison, the diagnostic sensitivity and specificity of anti\u2013Sjo\u0308gren syndrome A (SSA) antibodies for primary Sjo\u0308gren syndrome in the same patient cohort were 88.2% and 76.3%, respectively. Interestingly, 5 of 11 primary Sjo\u0308gren syndrome patients with no anti-SSA or anti-SSB antibodies had anti\u2013hnRNP H1 antibodies. Anti\u2013hnRNP H1 antibodies were preabsorbed by hnRNP H1, as demonstrated by indirect immunofluorescence. In an evaluation of the presence of anti\u2013hnRNP H1 antibodies in 188 consecutive samples submitted to the clinical laboratory with positive ANA (titer \u2265160), anti\u2013hnRNP H1 antibodies were found in 3 of 7 (2 primary and 5 secondary) Sjo\u0308gren syndrome patients and in 8.3% of the diseased controls.<\/jats:p><jats:p>Conclusions: HnRNP H1 is a newly discovered autoantigen that could become an additional diagnostic marker.<\/jats:p>","DOI":"10.1373\/clinchem.2008.115626","type":"journal-article","created":{"date-parts":[[2009,3,6]],"date-time":"2009-03-06T04:52:49Z","timestamp":1236315169000},"page":"946-954","source":"Crossref","is-referenced-by-count":13,"title":["Heterogeneous Nuclear Ribonucleoprotein H1, a Novel Nuclear Autoantigen"],"prefix":"10.1093","volume":"55","author":[{"given":"Karolien","family":"Van den Bergh","sequence":"first","affiliation":[{"name":"Laboratory Medicine, Immunology, University Hospitals Leuven, 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