Journal of clinical rheumatology : practical reports on rheumatic & musculoskeletal diseases · 2019
Cluster Analysis Using Anti-Aminoacyl-tRNA Synthetases and SS-A/Ro52 antibodies in Patients With Polymyositis/Dermatomyositis.
СтатьяНазвание и аннотация: Перевод в очереди
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Ohashi Keiji, Sada Ken-Ei, Nakai Yu, Matsushima Shun, Asano Yosuke, Hayashi Keigo, Yamamura Yuriko, Hiramatsu Sumie, Miyawaki Yoshia, Morishita Michiko, Katsuyama Takayuki, Katsuyama Eri, Watanabe Haruki, Tatebe Noriko, Narazaki Mariko, Matsumoto Yoshinori, Sunahori Watanabe Katsue, Kawabata Tomoko, Wada Jun
Аннотация
OBJECTIVE: Although several autoantibodies have been identified for polymyositis/dermatomyositis (PM/DM) diagnosis, the clinical impact of these antibodies is yet to be elucidated.
METHODS: Patients with PM/DM at Okayama University Hospital from 2012 to 2016 were historically enrolled, and antibody profiles were analyzed using line immunoassay. Hierarchical cluster analysis was performed based on serological analysis of anti-aminoacyl-tRNA synthetase (ARS) antibodies, including anti-Jo-1, PL-7, PL-12, EJ, OJ, and SS-A/Ro-52 antibodies. Clinical symptoms and relapse proportions were compared among these clusters.
RESULTS: Sixty-one patients were enrolled in this study: 28 were diagnosed with PM, and 33 were diagnosed with DM. The following 3 clusters were determined: 1 (n = 10), anti-Jo-1 and anti-SS-A/Ro-52 antibodies double positive (10/10, 100%); 2 (n = 24), anti-SS-A/Ro-52 antibody positive (20/24, 83%), anti-Jo-1 antibody negative (24/24, 100%), and anti-ARS antibodies (excluding anti-Jo-1 antibody) positive (15/24, 63%); and 3 (n = 27), anti-Jo-1 and anti-SS-A/Ro52 antibodies double negative (26/27, 96%). The proportion of patients who relapsed was significantly lower in cluster 3 than it was in clusters 1 and 2 (risk ratio, 0.37; 95% confidence interval, 0.17-0.83; p = 0.026 and risk ratio, 0.42; 95% confidence interval, 0.20-0.89; P = 0.019, respectively). There was no difference in the proportion of relapsed patients between clusters 1 and 2.
CONCLUSIONS: Our cluster analysis shows that anti-SS-A/Ro52 or any anti-ARS antibodies or both might be relevant to clinical outcomes.
METHODS: Patients with PM/DM at Okayama University Hospital from 2012 to 2016 were historically enrolled, and antibody profiles were analyzed using line immunoassay. Hierarchical cluster analysis was performed based on serological analysis of anti-aminoacyl-tRNA synthetase (ARS) antibodies, including anti-Jo-1, PL-7, PL-12, EJ, OJ, and SS-A/Ro-52 antibodies. Clinical symptoms and relapse proportions were compared among these clusters.
RESULTS: Sixty-one patients were enrolled in this study: 28 were diagnosed with PM, and 33 were diagnosed with DM. The following 3 clusters were determined: 1 (n = 10), anti-Jo-1 and anti-SS-A/Ro-52 antibodies double positive (10/10, 100%); 2 (n = 24), anti-SS-A/Ro-52 antibody positive (20/24, 83%), anti-Jo-1 antibody negative (24/24, 100%), and anti-ARS antibodies (excluding anti-Jo-1 antibody) positive (15/24, 63%); and 3 (n = 27), anti-Jo-1 and anti-SS-A/Ro52 antibodies double negative (26/27, 96%). The proportion of patients who relapsed was significantly lower in cluster 3 than it was in clusters 1 and 2 (risk ratio, 0.37; 95% confidence interval, 0.17-0.83; p = 0.026 and risk ratio, 0.42; 95% confidence interval, 0.20-0.89; P = 0.019, respectively). There was no difference in the proportion of relapsed patients between clusters 1 and 2.
CONCLUSIONS: Our cluster analysis shows that anti-SS-A/Ro52 or any anti-ARS antibodies or both might be relevant to clinical outcomes.