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特定于IgG亚类的N-糖化分化HRCT亚型在与ILD相关的异常性炎症性肌病症中

Tong Wu^1,2, Yanhong Li^1,2, Yingying Ling¹

¹Department of Rheumatology and Immunology, Laboratory of Rheumatology and Immunology, West China Hospital, Sichuan University, Chengdu, China.

Frontiers in immunology

|November 19, 2025

概括

独特的IgG糖型可以区分异质性炎症肌病 (IIM) 中的间歇性肺病亚型. 这一发现可能有助于对自身免疫性肺部疾病的分类和指导研究.

科学领域:

免疫学免疫学免疫学
肺部病理学肺部病理学
质谱测量质量谱测量

背景情况:

异形性炎症性肌肉病变 (IIM) 通常涉及间歇性肺部疾病 (ILD),这是疾病和死亡的重要原因.
在IIM患者中,放射性ILD亚型之间的免疫学差异尚不清楚.

研究的目的:

调查特定于子类的IgG N-glycopeptides是否可以在IIM患者中区分基于高分辨率计算机断层扫描 (HRCT) 的ILD模式.
探索在IIM中不同ILD亚型背后的免疫异质性.

主要方法:

在145名IIM患者 (98名ILD患者) 中分析了血IgG亚类特定的N-糖,使用完整的糖质谱.
根据HRCT扫描,IIM-ILD患者 (n=82) 被分类为纤维化非特异性间歇性肺炎 (fNSIP),细胞NSIP (cNSIP) 和组织性肺炎 (OP).
使用LASSO选择的糖和临床变量构建了一个加权的多项物流回归模型.

主要成果:

在HRCT亚型中确定了不同的N-糖标签:cNSIP (化IgG2),fNSIP (IgG1/IgG3) 和OP (IgG2-N5H4F1).
与没有ILD患者相比,IIM-ILD患者的IgG2糖中发现了显著的改变.
一个整合七个关键糖和七个临床变量的模型实现了HRCT亚型的稳健分类 (AUC = 0.89).

结论:

特定于子类的IgG N-糖化样本显示了IIM-ILD的免疫异质性.
将甘氨酸特征与临床数据相结合,可以有效地区分HRCT定义的内型.
这些发现支持改善疾病分类和未来对自身免疫相关ILD的研究.

关键词:

在N-glycosylation的过程中.葡萄糖蛋白质组学药物异形性炎症性肌肉病变 (Idiopathic Inflammatory Myopathies) 是一种异形性炎症性肌肉病变 (Idiopathic Inflammatory Myopathies) 的一种疾病.免疫球蛋白G 免疫球蛋白G 是一种间歇性肺病间歇性肺病不特定的间歇性肺炎.组织肺炎的组织.

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