Pulmonary manifestations of anti-ARS antibody positive interstitial pneumonia-With or without PM/DM

Hazuki Takato*, Yuko Waseda, Satoshi Watanabe, Kanako Inuzuka, Nobuyuki Katayama, Yukari Ichikawa, Masahide Yasui, Masaki Fujimura

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

28 Scopus citations


Background: Autoantibodies against aminoacyl-tRNA synthetases (ARS) have been found to be highly specific for polymyositis and dermatomyositis (PM/DM) and to correlate strongly with complicating interstitial pneumonia (IP). The aim of the present study was to compare the clinical presentations of anti-ARS antibody-positive IP patients with or without manifestations of PM/DM. Methods: We retrospectively examined 36 IP patients with anti-ARS antibodies. Sixteen patients presented with and 20 without the features of PM/DM. They were divided into PM/DM-IP and idiopathic-IP (IIP) groups. Clinical symptoms, findings on physical examination, laboratory data, pulmonary function, computed tomography (CT), and bronchoalveolar lavage fluid (BALF) cell counts were compared. Results: Skin findings, myalgia, and elevation of serum creatinine kinase were found in the PM/DM-IP group. Features common to both groups included: volume loss in lower bilateral lobes; ground-glass opacities, reticular shadows and traction bronchiectasis on chest CT; high percentage of lymphocytes (IIP: 44.0% ± 21.0% (mean ± SD), PM/DM-IP: 50.5% ± 23.5%) and low CD4/8 ratios (IIP: 0.36 ± 0.34, PM/DM-IP: 0.44 ± 0.42) in BALF; decreased pulmonary function, including percentage of predicted vital capacity (VC) (IIP: 80.1% ± 15.4%, PM/DM-IP: 73.6% ± 16.4%), residual volume (RV) (IIP: 70.7% ± 21.7%, PM/DM-IP: 71.5% ± 17.1%), total lung capacity (TLC) (IIP: 73.4% ± 13.6%, PM/DM-IP: 71.6% ± 13.0%), and diffusing capacity DLco (IIP: 57.5% ± 26.7%, PM/DM-IP: 46.4% ± 10.3%). Both groups achieved good responses to initial corticosteroid or immunosuppressant therapy. Conclusion: Patients with anti-ARS antibody-positive IP have common pulmonary manifestations regardless of the presence of PM/DM.

Original languageEnglish (US)
Pages (from-to)128-133
Number of pages6
JournalRespiratory Medicine
Issue number1
StatePublished - Jan 2013


  • Anti-ARS antibody
  • Interstital lung disease
  • Lung fibrosis
  • Polymyositis/dermatomyositis

ASJC Scopus subject areas

  • Pulmonary and Respiratory Medicine

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