乙酸性食道炎中的免疫球体G4:免疫复合体的形成和与疾病活动的相关性
Jonathan G Medernach1, Rung-Chi Li2, Xiao-Yu Zhao3
1Division of Pediatric Gastroenterology and Hepatology, University of Virginia School of Medicine, Charlottesville, Virginia, USA.
Allergy
|July 27, 2023
概括
免疫球蛋白G4 (IgG4) 和牛奶蛋白 (CMPs) 在活跃的乙酸性食道炎 (EoE) 中共定位. 这些免疫复合体可能通过激活异osinophils驱动EoE病原体.
科学领域:
- 免疫学 免疫学 免疫学
- 胃肠病学 胃肠病学
- 过敏 过敏是一种过敏.
背景情况:
- 性食道炎 (EoE) 与免疫球蛋白G4 (IgG4) 和食物蛋白质在食道中的沉积有关.
- IgG4 - 食物蛋白相互作用在 EoE 疾病活性中的确切作用尚不清楚.
研究的目的:
- 为了确定IgG4与主要牛奶蛋白 (CMP) 的同位定是否与EoE活性相关.
- 为了识别EoE食道组织中IgG4沉积物附近的蛋白质.
主要方法:
- 从EoE患者和对照对IgG4和CMP的食道活检的免疫光染色.
- 在活跃的EoE,缓解和对照组中评估IgG4-CMP同局部.
- 使用AutoSTOMP,共免疫沉和质谱学对IgG4丰富区域进行蛋白质组分析.
主要成果:
- 与缓解和对照组相比,在活跃的EoE中观察到显著更高的IgG4-CMP同局部.
- 在IgG4沉积物附近,AutoSTOMP发现了与乙氨基基基相关的蛋白质 (PRG2,PRG3,EPX,RNASE3) 和calpain-14.
- 同免疫沉和质谱学证实IgG4与多种食物过敏原结合.
结论:
- 这些发现支持活跃EOE中IgG4-CMP免疫复合物的形成.
- 这些免疫复合体与EoE病理生理学有关,可能促进乙氨基基基激活和疾病进展.
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