一个3'UTR插入在TMEM106B位置是一个候选因果变体,与FTLD-TDP风险增加有关
Augustine Chemparathy1, Yann Le Guen1, Yi Zeng1
1From the Department of Neurology and Neurological Sciences (A.C., Y.L.G., N.K., L.T., M.B., I.S., V.W.H., T.W.-C., M.D.G.); Quantitative Sciences Unit (Y.L.G.), Department of Medicine; Department of Genetics (Y.Z., J.G., T.D.J., A.D.G., E.A.); Division of Cardiology (J.G., E.A.), Department of Medicine, Stanford University School of Medicine, CA; Neurogenomics and Informatics Center (C.Y., C.C.), Washington University School of Medicine, St. Louis, MO; Wu Tsai Neurosciences Institute (A.D.W., E.M.); Department of Psychology (A.D.W., E.M.); and Department of Epidemiology and Population Health (V.W.H.), Stanford University, CA.
在TMEM106B附近的一种新的Alu插入是前叶痴呆症的潜在原因,其中包括TDP-43包容 (FTLD-TDP) 和阿尔茨海默病 (AD). 这种变异影响TMEM106B蛋白水平,而不是mRNA,这表明它.
科学领域:
- 遗传学和基因组学 遗传学和基因组学
- 神经退行性疾病 神经退行性疾病
- 分子生物学分子生物学
背景情况:
- 全基因组关联研究 (GWAS) 确定了与FTLD-TDP和AD风险相关的TMEM106B附近的单核酸变异.
- 在TMEM106B位点的特定因果变异仍未确定.
研究的目的:
- 调查TMEM106B中的新型结构变体,特别是Alu元素插入是否是因果变体.
- 为了确定这种插入与FTLD-TDP和AD风险的关联.
主要方法:
- 对神经退行相关基因结构变异的探索性分析.
- 专注于TMEM106B的3'UTR中的Alu元素插入.
- 衰老队列的全基因组测序,ADSP队列的短读测序,以及转录组学和蛋白质组学数据的分析.
主要成果:
- 在TMEM106B 3'UTR中发现了316 bp Alu插入,与顶级GWAS变体rs3173615 ((C) 和rs1990622 ((A)) 密切相关.
- 插入显示了ADSP队列中不同祖先的这些变体的强烈链接不平衡.
- 主要的GWAS变体rs1990622与血和脑脊液中的TMEM106B蛋白水平有关,但与mRNA表达无关.
结论:
- 在TMEM106B 3'UTR中插入了一种新的Alu元素,是该位点因果变异的强有力的候选者.
- 这种插入与主要的FTLD-TDP风险变体密切相关,并影响TMEM106B蛋白水平.
- 需要进一步的功能研究来证实这种3'UTR插入的因果作用.
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