Document Detail

The diagnostic utility of anti-melanoma differentiation-associated gene 5 antibody testing for predicting the prognosis of Japanese patients with DM.
MedLine Citation:
PMID:  22378718     Owner:  NLM     Status:  Publisher    
Objective. Interstitial lung disease (ILD), especially rapidly progressive ILD (RPILD), is a major poor prognostic factor in patients with DM. We investigated the association of anti-melanoma differentiation-associated gene 5 (MDA5) antibody (Ab) with clinical characteristics and mortality in Japanese patients with DM.Methods. Seventy-nine DM patients, comprising 58 classic DM and 21 clinically amyopathic DM (CADM) patients, were enrolled. Serum Abs were screened by immunoprecipitation assays, and an immunosorbent assay (ELISA) was used for MDA5. The relationships of clinical characteristics and mortality with each Ab were investigated.Results. Anti-MDA5 Ab was detected in 17 patients. Anti-clinically amyopathic DM 140 kDa polypeptide Abs (anti-CADM-140 Abs) were found in 16 of the 17 anti-MDA5 Ab(+) patients. Skin ulcers, palmar papules, CADM, RPILD and mediastinal emphysema were widely distributed in anti-MDA5 Ab(+) patients. Mortality at 6 months as well as 5 years was also significantly higher in anti-MDA5 Ab(+) patients than in anti-MDA5 Ab(-) patients. In a multivariable Cox regression analysis, mortality was independently associated with anti-MDA5 Ab (relative hazard 6.33; 95% CI 1.43, 28.0). All of the deaths in anti-MDA5 Ab(+) patients were attributed to respiratory failure of RPILD; however, RPILD did not worsen in any of the anti-MDA5 Ab(+) patients who survived the first 6 months.Conclusion. The presence of anti-MDA5 Ab identifies the characteristic skin, musculoskeletal, pulmonary and prognostic features in patients with DM. In addition, anti-MDA5 Ab seems to predict a group of patients with CADM-complicated fatal RPILD.
Tomohiro Koga; Keita Fujikawa; Yoshiro Horai; Akitomo Okada; Shin-Ya Kawashiri; Naoki Iwamoto; Takahisa Suzuki; Yoshikazu Nakashima; Mami Tamai; Kazuhiko Arima; Satoshi Yamasaki; Hideki Nakamura; Tomoki Origuchi; Yasuhito Hamaguchi; Manabu Fujimoto; Yuji Ishimatsu; Hiroshi Mukae; Masataka Kuwana; Shigeru Kohno; Katsumi Eguchi; Kiyoshi Aoyagi; Atsushi Kawakami
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-2-29
Journal Detail:
Title:  Rheumatology (Oxford, England)     Volume:  -     ISSN:  1462-0332     ISO Abbreviation:  -     Publication Date:  2012 Feb 
Date Detail:
Created Date:  2012-3-1     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100883501     Medline TA:  Rheumatology (Oxford)     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Department of Immunology and Rheumatology, Unit of Translational Medicine, Graduate School of Biomedical Sciences, Nagasaki University School of Health Sciences, Nagasaki University, Nagasaki, Department of Dermatology, Graduate School of Medical Science, Kanazawa University, Ishikawa, Second Department of Internal Medicine, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Department of Respiratory Disease, School of Medicine, University of Occupational and Environmental Health, Kitakyushu, Division of Rheumatology, Department of Internal Medicine, Keio University School of Medicine, Tokyo, Sasebo City General Hospital, Sasebo and Department of Public Health, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan.
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