Kim Hanna
National Institute of Arthritis Musculoskeletal and Skin Diseases, National Institutes of Health, Bethesda, MD, USA.
Paediatr Drugs. 2025 Jan;27(1):57-72. doi: 10.1007/s40272-024-00658-2. Epub 2024 Oct 19.
Juvenile dermatomyositis is a rare systemic inflammatory autoimmune disease involving muscle, skin, and vessels. Most patients do not fully respond to initial therapy, instead having a chronic refractory or polycyclic disease course. Pathogenesis is not completely understood, but immune cell dysregulation, particularly of B cells, mitochondrial dysfunction, changes in neutrophils and neutrophil extracellular traps (NETs), and increased type I and type II interferon (IFN) signaling have been described. There are limited randomized controlled trials of drugs in juvenile dermatomyositis (JDM), and treatment is largely based on lower-quality data such as case series, retrospective studies, and open-label prospective studies. These data have been compiled into expert recommendations or consensus treatment plans, which help guide therapy. While initial therapy is more standard with most including corticosteroids (high-dose oral and/or pulse intravenous methylprednisolone) and methotrexate, for refractory patients, guidelines are more varied with multiple options or combinations, including biologic therapies. There is a clear need for more efficacious and personalized therapy in JDM. Emerging treatment options worthy of further study in JDM include targeting IFN-signaling (JAK, IFNAR1, IFN beta), B-cells (CD20, CD19, BAFF, TACI, CD38, BCMA) including Chimeric Antigen Receptor (CAR)-T cell therapy, mitochondrial dysfunction, and NETs.
幼年皮肌炎是一种罕见的累及肌肉、皮肤和血管的系统性炎症性自身免疫性疾病。大多数患者对初始治疗反应不完全,而是呈现慢性难治性或多循环病程。发病机制尚未完全明确,但已描述了免疫细胞失调,尤其是B细胞失调、线粒体功能障碍、中性粒细胞及中性粒细胞胞外陷阱(NETs)的变化,以及I型和II型干扰素(IFN)信号传导增加。幼年皮肌炎(JDM)药物的随机对照试验有限,治疗很大程度上基于病例系列、回顾性研究和开放标签前瞻性研究等质量较低的数据。这些数据已被汇编成专家建议或共识治疗方案,以帮助指导治疗。虽然初始治疗大多较为标准,包括使用皮质类固醇(大剂量口服和/或静脉注射甲泼尼龙脉冲疗法)和甲氨蝶呤,但对于难治性患者,指南的选择更多样化,有多种选择或联合治疗,包括生物疗法。JDM显然需要更有效和个性化的治疗。JDM中值得进一步研究的新兴治疗选择包括靶向IFN信号传导(JAK、IFNAR1、IFNβ)、B细胞(CD20、CD19、BAFF、TACI、CD38、BCMA),包括嵌合抗原受体(CAR)-T细胞疗法、线粒体功能障碍和NETs。