| Title: | Clinical features of anti-mitochondrial M2 antibody-positive myositis : case series of 17 patients |
| Authors: | Nagai, Azusa Browse this author |
| Nagai, Toshiyuki Browse this author →KAKEN DB |
| Yaguchi, Hiroaki Browse this author |
| Fujii, Shintaro Browse this author |
| Uwatoko, Hisashi Browse this author |
| Shirai, Shinichi Browse this author |
| Horiuchi, Kazuhiro Browse this author |
| Iwata, Ikuko Browse this author |
| Matsushima, Masaaki Browse this author |
| Ura, Shigehisa Browse this author |
| Anzai, Toshihisa Browse this author →KAKEN DB |
| Yabe, Ichiro Browse this author →KAKEN DB |
| Keywords: | Anti-mitochondrial M2 antibody |
| Myositis |
| Inflammatory myopathy |
| Weight loss |
| Cardiac complication |
| Respiratory failure |
| Chronic clinical course |
| Issue Date: | 15-Nov-2022 |
| Publisher: | Elsevier |
| Journal Title: | Journal of the neurological sciences |
| Volume: | 442 |
| Start Page: | 120391 |
| Publisher DOI: | 10.1016/j.jns.2022.120391 |
| Abstract: | Objective: In 2012, a large number of myositis cases with anti-mitochondrial M2 (AMA-M2) antibody, which had well been known as the serological hallmark for primary biliary cholangitis (PBC), were reported in Japan. Recently, some case series from Japan, France, America, China and India have shown that approximately 2.5% to 19.5% of patients with myositis have AMA-M2 antibody. The objective of this study was to clarify the prevalence, clinical features, treatment outcome, and severity determinants of AMA-M2 positive myositis. Methods: This study was a multicenter observational study. We enrolled patients who were diagnosed with myositis during a ten-year period between 2012 and 2021. Results: Of the total of 185 patients with inflammatory myopathy, 17 patients were positive for AMA-M2 anti-body. The typical symptoms were weakness mainly involving paravertebral muscles, weight loss, respiratory failure, and cardiac complications. Thirteen of the 17 patients had cardiac complications. A strong correlation was found between respiratory failure and modified Rankin Scale (mRS) score. A strong correlation was also found between respiratory failure and body weight, indicating that weight loss can be an indicator of potential progression of respiratory failure. Six of the 17 patients were complicated by malignancy. Conclusions: This study showed significant correlations between % vital capacity (VC), body mass index (BMI), and mRS score in patients with AMA-M2-positive myositis. Immunotherapy often improved CK level and res-piratory dysfunction. We therefore propose that %VC and BMI should be monitored as disease indicators in treatment of AMA-M2-positive myositis. |
| Rights: | © 2022, Elsevier. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Type: | article (author version) |
| URI: | http://hdl.handle.net/2115/90686 |
| Appears in Collections: | 医学院・医学研究院 (Graduate School of Medicine / Faculty of Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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