自体主导的STAT6功能增长导致与淋巴瘤相关的严重topia
Ekaterina Minskaia1, Jesmeen Maimaris2,3, Persephone Jenkins1
1University College London Institute of Immunity and Transplantation, London, UK.
Journal of clinical immunology
|June 14, 2023
概括
一种新的STAT6突变导致功能增加,导致早期发病的过敏性疾病,如亚托皮炎和喘. 这种遗传因素也可能增加淋巴瘤的风险.
科学领域:
- 免疫学 免疫学 免疫学
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
背景情况:
- 信号转换器和转录激活器6 (STAT6) 对于T-助手2介导的过敏炎症至关重要.
- 介质素-4 (IL-4) Janus 激酶 (JAK) /STAT 途径是过敏反应的关键调节者.
研究的目的:
- 为了确定早期发作的过敏性疾病的遗传基础.
- 研究一种新型STAT6突变 (c.1255G>C,p.D419H) 对IL-4 JAK/STAT信号传递的功能影响.
主要方法:
- 基因测序以确定受影响个体的突变.
- 细胞测试比较野生型STAT6和HEK293T细胞,纤维细胞和PBMC中的D419H突变体.
- 对STAT6表达,酸化和下游基因激活的分析 (XBP1,EPAS1).
- 用JAK1/JAK2抑制剂鲁克索利提尼布治疗以评估途径调节.
主要成果:
- 在一个患有早发性亚托皮性皮炎,食物过敏,喘,过敏反应和淋巴瘤的家庭中,发现了一种新型异合体生殖基因突变,STAT6 D419H.
- 与野生类型相比,STAT6 D419H细胞在IL-4刺激时表现出更高的基线STAT6水平和增加的STAT6酸化.
- 在患者细胞中观察到升高的STAT6和化STAT6,核局部化增加.
- 在患者的PBMC中观察到下游基因上调 (XBP1,EPAS1).
- 鲁克索利提尼布有效地降低了D419H细胞和患者PBMC中的STAT6酸化.
结论:
- 由于D419H突变而导致的STAT6功能增益 (GOF) 是早期发病的亚托邦性疾病的新奇单一遗传原因.
- 鉴定到的STAT6GOF可能会使个体容易发生淋巴发育,特别是毛囊性淋巴瘤,基于临床关联和先前的研究.
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