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儿科免疫媒介性死性肌肉病:一个单一中心的回顾性队列研究
Yikang Wang1, Mengting Yang1, Yawen Zhao1
1Department of Neurology, Peking University First Hospital, Beijing, China.
Pediatric neurology
|April 9, 2025
概括
儿科免疫媒介性死性肌肉病 (IMNM) 经常与抗-3-基-3-甲基氨酸-CoA减少酶 (anti-HMGCR) 抗体相关,并呈现出慢性发病和近位弱点. 这些患者往往对免疫抑制疗法反应不佳.
科学领域:
- 儿科风湿病学 儿科风湿病学
- 神经肌肉疾病 神经肌肉疾病
- 免疫学 免疫学 免疫学
背景情况:
- 免疫媒介性死性肌肉病变 (IMNM) 是一种特异性炎症性肌肉病变 (IIM) 的子集.
- 关于儿科IMNM的特定表型的数据有限.
- 了解儿科IMNM特征对于诊断和管理至关重要.
研究的目的:
- 阐明儿科IMNM的临床,成像和肌病学特征.
- 识别与不同抗体配置相关的独特特征 (抗SRP,抗HMGCR,血清阴性).
- 为了评估儿科IMNM患者的治疗反应.
主要方法:
- 对116名儿科IIM患者的回顾性分析.
- 面向肌肉活检的注册研究.
- 通过免疫块测定检测反信号识别粒子 (anti-SRP) 和抗-3--3-甲基-CoA减少酶 (anti-HMGCR) 抗体.
- 55名儿科IMNM患者的临床,成像 (MRI) 和肌病学数据分析.
主要成果:
- 该队列包括55名儿科IMNM患者 (38名女性,17名男性;中位数年龄为7岁).
- 常见的表现包括近端和部软弱,60%的人经历了慢性发作.
- 抗HMGCR抗体是最常见的 (61.8%),其次是抗SRP (20.0%) 和血清阴性 (18.2%).
- 肌肉MRI显示普遍胀,脂肪透与疾病持续时间相关.
- 在血清阴性IMNM中,死性肌肉病最为普遍,而在抗SRP肌肉病中,变性病理更为常见.
- 只有46.2%的治疗患者实现了完全或部分缓解,在抗HMGCR肌病症中缓解率明显较低.
结论:
- 儿科IMNM在中国儿科IIM患者中相对较为常见.
- 抗HMGCR抗体很普遍,经常出现在女性患者中,患有慢性发病和近位弱点.
- 这些患者通常缺乏其他器官的参与,并表现出与疾病过程相关的肌肉脂肪透.
- 儿童IMNM患者中很大一部分对免疫抑制疗法的反应不佳.
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