Volume 26, Issue 5 pp. 938-945
ORIGINAL ARTICLE

Treatment for macrophage activation syndrome associated with systemic juvenile idiopathic arthritis in Japan

Masaki Shimizu

Corresponding Author

Masaki Shimizu

Department of Child Health and Development, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan

Correspondence

Masaki Shimizu, Department of Child Health and Development, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, 1-5-45 Yushima, Bunkyo-ku, Tokyo 113-8510, Japan.

Email: [email protected]

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Kenichi Nishimura

Kenichi Nishimura

Department of Pediatrics, Yokohama City University Graduate School of Medicine, Yokohama, Japan

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Naomi Iwata

Naomi Iwata

Department of Immunology and Infectious Diseases, Aichi Children's Health and Medical Center, Obu, Japan

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Takahiro Yasumi

Takahiro Yasumi

Department of Pediatrics, Kyoto University Graduate School of Medicine, Kyoto, Japan

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Hiroaki Umebayashi

Hiroaki Umebayashi

Department of Rheumatics, Miyagi Children's Hospital, Sendai, Japan

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Yasuo Nakagishi

Yasuo Nakagishi

Department of Pediatric Rheumatology, Hyogo Prefectural Kobe Children's Hospital, Kobe, Japan

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Yuka Okura

Yuka Okura

Department of Pediatrics, KKR Sapporo Medical Center, Sapporo, Japan

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Nami Okamoto

Nami Okamoto

Department of Pediatrics, School of Medicine, Osaka Medical and Pharmaceutical University, Takatsuki, Japan

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Noriko Kinjo

Noriko Kinjo

Department of Pediatrics, Faculty of Medicine, University of the Ryukyus, Nakagami-gun, Japan

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Mao Mizuta

Mao Mizuta

Department of Pediatric Rheumatology, Hyogo Prefectural Kobe Children's Hospital, Kobe, Japan

Department of Pediatrics, Graduate School of Medical Sciences, Kanazawa University, Kanazawa, Japan

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Masato Yashiro

Masato Yashiro

Department of Pediatrics, Okayama University Hospital, Okayama, Japan

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Junko Yasumura

Junko Yasumura

Department of Pediatrics, Hiroshima University Graduate School of Biomedical & Health Sciences, Hiroshima, Japan

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Hiroyuki Wakiguchi

Hiroyuki Wakiguchi

Department of Pediatrics, Yamaguchi University Graduate School of Medicine, Ube, Japan

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Tomohiro Kubota

Tomohiro Kubota

Department of Pediatrics, Graduate School of Medical and Dental Sciences, Kagoshima University, Kagoshima, Japan

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Mariko Mouri

Mariko Mouri

Department of Lifetime Clinical Immunology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan

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Utako Kaneko

Utako Kaneko

Department of Pediatrics, Niigata University School of Medicine, Niigata, Japan

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Masaaki Mori

Masaaki Mori

Department of Lifetime Clinical Immunology, Graduate School of Medical and Dental Sciences, Tokyo Medical and Dental University, Tokyo, Japan

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First published: 27 March 2023
Citations: 1

Abstract

Objectives

To clarify how pediatric rheumatologists treat systemic juvenile idiopathic arthritis (s-JIA) associated macrophage activation syndrome (MAS) in the real world and to assess the efficacy and safety of dexamethasone palmitate (DEX-P) in the treatment of s-JIA-associated MAS.

Methods

This multicenter, retrospective study was conducted at 13 pediatric rheumatology institutes in Japan. This study included 28 patients with s-JIA-associated MAS. Clinical findings, such as treatment details and adverse events, were evaluated.

Results

Methylprednisolone (mPSL) pulse therapy was selected as the first-line treatment in more than half of the patients with MAS. Cyclosporine A (CsA) was used as first-line therapy in combination with corticosteroids in half of the patients with MAS. DEX-P and/or CsA were selected as the second-line therapy in 63% of patients with corticosteroid-resistant MAS. Plasma exchange was selected as the third-line therapy for DEX-P and CsA-resistant MAS. All patients improved and there were no characteristically severe adverse events associated with DEX-P.

Conclusions

The first-line treatment for MAS in Japan is mPSL pulse therapy and/or CyA. DEX-P could be an effective and safe therapeutic option for patients with corticosteroid-resistant MAS.

CONFLICT OF INTEREST STATEMENT

Tokyo Medical and Dental University (TMDU) received unrestricted research grants for Department of Lifetime Clinical Immunology from AbbVie GK, Ayumi Pharmaceutical, Chugai Pharmaceutical, CSL Behring, Japan Blood Products Organization, Mitsubishi Tanabe Pharma, Nippon Kayaku, Ono Pharmaceutical, Towa Pharmaceutical, and UCB Japan. TMDU paid the salary of Masaaki Mori. The authors declare they have no competing interests.

DATA AVAILABILITY STATEMENT

The data supporting the findings of this study are available on request from the corresponding author.

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