DOCK8 缺乏症是由于两位患有高IgE综合征的亲属的深层内在变异引起的
Fatma Betul Oktelik1, Muyun Wang2, Sevgi Keles3
1Division of Immunology, Boston Children's Hospital, Boston, MA, USA; Department of Immunology, Aziz Sancar Institute of Experimental Medicine (Aziz Sancar DETAE), Istanbul University, Istanbul, Turkiye; Department of Pediatrics, Harvard Medical School, Boston, MA, USA.
Clinical immunology (Orlando, Fla.)
|October 22, 2024
概括
在细胞动力学8 (DOCK8) 的致力者中,一种新型的深层内部变异会导致超免疫球蛋白E综合征 (HIES). 这种非编码突变影响T细胞功能,并强调了探索无法解释的免疫缺陷中的内基区域的重要性.
科学领域:
- 遗传学 遗传学 是一个
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
背景情况:
- 细胞动力学8分辨器 (DOCK8) 缺乏是自体逆性超免疫球蛋白E综合征 (HIES) 的主要原因.
- 大多数已知的DOCK8突变导致蛋白质表达的完全丧失.
- 一些患有HIES类症状的患者缺乏可识别的突变,这表明其他遗传原因.
研究的目的:
- 在没有明显的DOCK8突变的HIES患者中确定遗传原因.
- 为了研究新发现的内部DOCK8变异的功能后果.
- 为了强调非编码突变在原发性免疫缺陷障碍中的重要性.
主要方法:
- 整体外体测序 (WES) 用于识别受影响个体的遗传变异.
- 进行了功能性测试,以评估变异对DOCK8表达和T细胞功能的影响.
- 分析包括T细胞受体触发的活性蛋白聚合,STAT3酸化和细胞因子标志物表达.
主要成果:
- 在两个无关HIES患者中发现了一种深度内源性同卵性DOCK8变体 (c.4626+76 A>G).
- 这种变异导致了DOCK8cDNA中的内基序列插入,导致过早停止编码子和减少DOCK8表达.
- 损伤的T细胞功能包括减少的活性蛋白聚合,减少的IL-6/STAT3信号传递,以及改变的Th17/Th2细胞平衡.
结论:
- 整体外体测序可以有效地检测引起疾病的内基变异.
- 非编码突变,特别是深层内基变异,在DOCK8缺乏和其他免疫缺陷中起着至关重要的作用.
- 进一步研究内在区域对于诊断无法解释的免疫天生的错误至关重要.
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