Anti-PL-7 (Anti-Threonyl-tRNA synthetase) Antisynthetase syndrome: Clinical manifestations in a series of patients from a european multicenter study (EUMYONET) and review of the literature

Ane Labirua-Iturburu, Albert Selva-O'Callaghan, Melinda Vincze, Katalin Dankó, Jiri Vencovsky, Benjamin Fisher, Peter Charles, Maryam Dastmalchi, Ingrid E. Lundberg

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71 Citations (Scopus)

Abstract

Autoantibodies against several aminoacyl-transfer-RNA synthetases have been described in patients with myositis; anti-threonyl-tRNA synthetase (anti-PL-7) is one of the rarest. We describe the clinical and laboratory characteristics of a cohort of European anti-PL-7 patients, and compare them with previously reported cases. This multicenter study of patients positive for anti-PL-7, identified between 1984 and 2011, derives from the EUMYONET cohort. Clinical and serologic data were obtained by retrospective laboratory and medical record review, and statistical analyses were performed with chi-squared and Fisher exact tests.Eighteen patients, 15 women, were anti-PL-7 antibody positive. Median follow-up was 5.25 years (interquartile range, 2.8-10.7 yr), and 4 patients died. All patients had myositis (12 polymyositis, 5 dermatomyositis, and 1 amyopathic dermatomyositis), 10 (55.6%) had interstitial lung disease, and 9 (50%) had pericardial effusion. Occupational exposure to organic/inorganic particles was more frequent in patients with interstitial lung disease than in the remaining patients (5 of 10 vs. 1 of 7; p = 0.152), although the difference was not significant. Concurrent autoantibodies against Ro60 and Ro52 were seen in 8 of 14 (57%) patients studied. In the literature review the most common manifestations of anti-PL-7 antisynthetase syndrome were interstitial lung disease (77%), myositis (75%), and arthritis (56%). As in other subsets of the antisynthetase syndrome, myositis and interstitial lung disease are common features of the anti-PL-7 antisynthetase syndrome. In addition, we can add pericarditis as a possible manifestation related to anti-PL-7 antibodies. © 2012 by Lippincott Williams & Wilkins.
Original languageEnglish
Pages (from-to)206-211
JournalMedicine (United States)
Volume91
Issue number4
DOIs
Publication statusPublished - 1 Jul 2012

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