在儿科类类风湿性疾病中IFIH1和DDX58基因变异
Rinat Raupov1, Evgeny Suspitsin2, Konstantin Belozerov1
1Department of Pediatry, Saint-Petersburg State Pediatric Medical University, Saint-Petersburg 194100, Russia.
World journal of clinical pediatrics
|June 21, 2023
概括
罕见的DDX58和IFIH1基因变异与儿科类风湿性疾病有关,经常导致干扰素I信号通路过活. 这些发现表明这些基因在自身免疫性疾病中的作用.
科学领域:
- 遗传学 是一个遗传学.
- 免疫学 免疫学 免疫学
- 类风湿病学 类风湿病学
背景情况:
- IFIH1基因编码MDA5,DDX58编码RIG-I,对干扰素 (IFN) I信号通路在抗病毒防御和先天免疫中至关重要.
- IFIH1和DDX58中的多态性与自身免疫性疾病有关;罕见的功能增益的IFIH1突变会导致辛格尔顿-梅和艾卡迪-古蒂耶综合征,而DDX58突变可以导致非典型的辛格尔顿-梅综合征.
研究的目的:
- 为了识别和描述患有儿科类风湿性疾病 (PRD) 的儿童,这些儿童携带DDX58或IFIH1基因的变异.
- 调查这些患者的临床表现和干扰素I信号通路激活.
主要方法:
- 对92名被诊断患有各种PRD的儿童进行了临床外基因组测序.
- 在14名儿童中检测到IFIH1和DDX58的变异,分析了他们的IFN-I分数,并研究了他们的临床特征.
主要成果:
- 七名患有DDX58变体 (包括SLE,MCTD和uSAID) 的患者显示IFN-I得分升高;一名患者具有与SLE相关的可能致病变体 (p.Cys864fs).
- 七名患有IFIH1变体 (包括uSAID,JDM,SLE类疾病) 的患者也呈现出高的IFN-I得分;几个携带不确定的意义变体 (VUS) 或以前未报告的变体.
结论:
- 罕见的异构卵性IFIH1 (p.T520A) 和DDX58 (p.Cys864fs) 变种,以及复合异构卵性IFIH1变种 (p.L679Ifs*2和p.V599Ffs*5),很可能导致usaid和SLE.
- 大多数患有DDX58和IFIH1变异的患者表现出IFN I信号通路的过度激活,这突显了它在这些疾病中的作用.
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