全长度异形序列测定用于解决Charcot-Marie-Tooth 2A的分子基础
Andrew B Stergachis1, Elizabeth E Blue1, Madelyn A Gillentine1
1From the Department of Medicine (A.B.S., E.E.B., A.S.C., J.R., A.A., A.E.B., S.C., A.B.F., M.H.-P., A.P., W.H.R., E.A.R., S. Sheppeard, S. Strohbehn, V.P.S., P.H.H.B., G.P.J., F.M.H.), Genome Sciences (A.B.S., G.P.J.), University of Washington School of Medicine; Brotman Baty Institute for Precision Medicine (A.B.S., E.E.B., D.D., I.G., D.E.M., G.M., M.J.B., K.M.D., G.P.J., F.M.H.); University of Washington (E.E.B., J.C., A.T.K.), Institute of Public Health Genetics; Department of Laboratories (M.A.G.), Seattle Children's Hospital, WA; Institute for Precision Health (L.-K.W., A.Y.H., S.F.N.), David Geffen School of Medicine, University of California Los Angeles; Department of Laboratory Medicine and Pathology (U.S., D.E.M., T.T.T., M.H.W., P.H.H.B.), University of Washington School of Medicine; Department of Pediatrics (D.D., I.G., D.E.M., G.M., M.J.B., K.M.D.), Department of Biostatistics (A.T.K.), University of Washington; Group Health Cooperative (K.A.L.), Kaiser Permanente Washington; Seattle Children's Research Institute (G.M.), Center for Integrative Brain Research; and Department of Biochemistry (S.H.), University of Washington School of Medicine, Seattle, WA.
全长度转录序列测定发现了一种新的MFN2拼接变种,导致2A型 (CMT2A) 自体递归的Charcot-Marie-Tooth疾病. 这种方法有助于通过揭示复杂的分子机制来诊断罕见的遗传疾病.
科学领域:
- 基因组学和分子生物学
- 神经遗传学 神经遗传学
- 罕见疾病的诊断 罕见疾病的诊断
背景情况:
- 短读转录序列测序有助于门德尔条件诊断.
- 对于罕见疾病,全长长读转录序列的实用性仍未得到充分探索.
研究的目的:
- 在未诊断的神经病症病例中调查全长长读取成绩单测序的诊断效用.
- 为了阐明患者怀疑的孟德尔状况背后的分子机制.
主要方法:
- 应用了对患者衍生纤维细胞的短读和全长转录序列.
- 进行了线粒体功能研究.
- 使用无意义介导的mRNA衰变 (NMD) 抑制剂治疗用于转录分析.
主要成果:
- 鉴定了一种同卵性内基MFN2变体 (c.600-31T>G) 破坏拼接.
- 全长度测序揭示了5个不同的异常拼接转录,所有这些都是NMD的对象.
- 患者的纤维细胞显示出异常的脂质液滴形成,表明MFN2功能障碍,导致轴突Charcot-Marie-Tooth疾病2A型 (CMT2A).
结论:
- 全长度异型序列测序对于在未诊断的罕见疾病中表征分子机制是有价值的.
- 这项研究扩大了对CMT2A.遗传基础的理解.
- 鉴定的MFN2变种导致MFN2蛋白水平不足和疾病的表现.
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相关概念视频
Animal Mitochondrial Genetics
Single Nucleotide Polymorphisms-SNPs
