由删除CHASERR,一个lncRNA基因所引起的神经发育障碍
Vijay S Ganesh1, Kevin Riquin1, Nicolas Chatron1
1From the Broad Center for Mendelian Genomics, Program in Medical and Population Genetics, Broad Institute of Massachusetts Institute of Technology and Harvard, Cambridge (V.S.G., M.C.O., J.K.G., K.V.G., E.E., B.W., F.A., D.G.M., A.O.-L.), and the Department of Neurology, Brigham and Women's Hospital (V.S.G.), the Division of Genetics and Genomics, Boston Children's Hospital (V.S.G., A.O.-L.), and Harvard Medical School (V.S.G., A.O.-L.), Boston - all in Massachusetts; L'institut du Thorax (K.R., B.I., S.B., B.C.), Service de Radiopediatrie (A.P.), and Service de Génétique Médicale (B.I., S.B., B.C.), Nantes Université, Centre Hospitalier Universitaire (CHU) de Nantes, Centre National de la Recherche Scientifique (CNRS), INSERM, Nantes, and Institut Neuromyogène, Laboratoire Physiopathologie et Génétique du Neurone et du Muscle, CNRS, INSERM (N.C., D.S.), and Service de Génétique, Hospices Civils de Lyon (N.C., P.M., D.S.), Lyon - all in France; the Departments of Neurology (E.Y., K.-M.L., M.C.A., G.L.C.) and Pharmacology (G.L.C.), Northwestern University Feinberg School of Medicine, Chicago; the Undiagnosed Diseases Network and the Department of Molecular and Human Genetics, Baylor College of Medicine, Houston (C.A.B., D.R.M., H.D., J.A.R., L.T.E., S. Ketkar), and the Department of Pediatrics, University of Texas Southwestern Medical Center (S. Kayani), and Coalition to Cure CHD2 (B.B.), Dallas; the Departments of Immunology and Regenerative Biology and Molecular Neuroscience, Weizmann Institute of Science, Rehovot, Israel (Y.S., I.U.); and the Centre for Population Genomics, Garvan Institute of Medical Research and University of New South Wales Sydney, Sydney (D.G.M.), and the Centre for Population Genomics, Murdoch Children's Research Institute, Melbourne, VIC (D.G.M.) - both in Australia.
通过增加CHD2蛋白水平,CHASERR基因位点的删除会导致明显的神经发育障碍. 这表明CHD2在人类疾病中具有双向剂量敏感性.
科学领域:
- 遗传学 是一个遗传学.
- 神经科学是一个神经科学.
- 分子生物学分子生物学
背景情况:
- 在CHD2中新的功能丧失变体会导致发育性和性脑病变.
- 长非编码RNAs (lncRNAs) 在基因调节中起着至关重要的作用.
- 该lncRNACHASERR位于CHD2基因的邻近.
研究的目的:
- 为了研究三名儿童中综合征性,早期发作的神经发育障碍的遗传基础.
- 为了确定在CHASERR位点中的de novo删除的功能后果.
主要方法:
- 在受影响儿童的CHASERR位点中对de novo缺失的分析.
- 包括神经成像和临床评估在内的表型表征.
- 在患者衍生细胞系中评估CHD2蛋白和转录水平.
主要成果:
- 三名无关联的儿童出现了严重的脑病变,面部形,皮质缩和脑低髓化,这是由于de novoCHASERR缺失造成的.
- CHASERR删除导致CHD2蛋白丰富度增加和CHD2转录的cis表达增加.
- 观察到的表型与CHD2平分不充分症的表型不同.
结论:
- 在人类疾病中,CHD2表现出双向剂量敏感性.
- 影响lncRNA CHASERR的删除可以导致明显的神经发育障碍.
- 编码lncRNA的基因,特别是那些源自孟德尔病基因的前沿基因,需要进一步调查.
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