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FLT3停止突变增加FLT3连接体水平和自身免疫性甲状腺疾病的风险
Saedis Saevarsdottir1,2,3,4, Thorunn A Olafsdottir5,6, Erna V Ivarsdottir5,7
1deCODE genetics/Amgen, Reykjavik, Iceland. saedis.saevarsdottir@decode.is.
Nature
|June 26, 2020
概括
一项全基因组研究发现了与自身免疫性甲状腺疾病相关的99个序列变异,其中包括一个关键的FLT3变异 (rs76428106-C). 这种变异会影响FLT3蛋白的功能,增加其他自身免疫性疾病和急性髓性白血病的风险.
科学领域:
- 遗传学
- 免疫学
- 癌症学
背景情况:
- 自身免疫性甲状腺疾病 (AITD) 是一种具有很高遗传性的普遍自身免疫性疾病.
- 了解AITD的遗传基础对于确定疾病机制和潜在的治疗点至关重要.
研究的目的:
- 通过大规模的全基因组关联研究,识别与自身免疫性甲状腺疾病相关的新遗传变异.
- 研究已确定的变体对其他自身免疫和血液恶性瘤的功能后果和性作用.
主要方法:
- 进行了一项全基因组关联研究 (GWAS),涉及冰岛和英国生物库的30234例病例和725172例对照.
- 利用RNA测序来分析FLT3基因 (rs76428106-C) 中一个关键的内基变异的功能影响.
- 评估了rs76428106-C与其他自身免疫性疾病和急性髓性白血病的相关性.
主要成果:
- 在93个与AITD相关的位置确定了99个序列变异,其中84个变异是新报告的.
- 在FLT3 (rs76428106- C) 中,一种低频率的内源变异与AITD风险的关联最强 (OR=1. 46).
- 此外,RS76428106-C还与全身性红斑狼,类风湿性关节炎,乳病和急性骨髓性白血病有关,导致FLT3蛋白的截断和FLT3连体水平的增加.
结论:
- 在FLT3 (rs76428106-C) 中预测的功能丧失生殖系突变有助于AITD和其他自身免疫性疾病.
- 这种FLT3变异的机制涉及FLT3全长减少,FLT3连接体增加,以及急性髓性白血病的倾向.
- 这项研究强调FLT3是自身免疫和血液恶性瘤的重要遗传因素.
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