活动依赖神经保护蛋白 (ADNP) 的功能丧失,由结合受体位点突变引起Helsmoortel-Van der Aa综合征
Claudio Peter D'Incal1,2, Dale John Annear1, Ellen Elinck1
1Cognitive Genetics (CONGET), Centre for Medical Genetics (CMG), Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium Department of Medical Genetics, Antwerp, Belgium.
European journal of human genetics : EJHG
|February 29, 2024
概括
一种新型的ADNP基因缺失,无法通过外基因测序检测到,在一个儿童中引起了Helsmoortel-Van der Aa综合征. 这项研究强调了全基因组甲基化分析和面部识别软件作为关键的诊断工具.
科学领域:
- 遗传学 是一个遗传学.
- 神经发育障碍 神经发育障碍
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 赫尔斯穆尔特尔-范德阿综合征是一种罕见的遗传疾病,与活动依赖神经保护因子 (ADNP) 基因突变有关.
- 传统的外因子测序 (WES) 可以错过非编码突变,使诊断复杂化.
研究的目的:
- 报告赫尔斯莫尔特尔-范德阿综合征的第一个病例,该病症是由ADNP基因的新型内基因缺失引起的.
- 证明先进的诊断工具的实用性,包括全基因组CpG甲基化分析 (表征) 和面部识别软件 (PhenoScore),在WES不确的情况下识别遗传疾病.
主要方法:
- 全基因组测序 (WGS) 和转录组测序用于识别和表征ADNP删除.
- 全基因组CpG甲基化分析,以检测诊断性表征.
- PhenoScore软件用于面部分析,以支持临床诊断.
- 转染实验用于评估突变ADNP基因的蛋白质表达.
主要成果:
- 在ADNP (c[-5-1_-4del]) 中发现了一种新的三基对内基删除,导致4号外子跳转和可能的哈普洛缺陷.
- 全基因组甲基化分析揭示了赫尔斯穆尔特尔-范德阿综合征的特征性表征.
- 费诺斯科尔分析支持了临床诊断.
- 途径分析表明,受影响的基因与大脑发育,细胞骨和肌肉发育有关.
结论:
- 赫尔斯穆尔特尔-范德阿综合征可能是由于功能丧失突变引起的,特别是由于ADNP删除而导致的哈普隆缺陷.
- 副标签,WGS和PhenoScore是复杂遗传疾病的宝贵补充诊断工具,特别是当WES产生负面结果时.
相关概念视频
Alternative RNA Splicing
21.1K
Alternative RNA splicing is the regulated splicing of exons and introns to produce different mature mRNAs from a single pre-mRNA. Unlike in constitutive splicing where a single gene produces a single type of mRNA, alternative splicing allows an organism to produce multiple proteins from a single gene and plays an important role in protein diversity.
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
There are five types of alternative RNA splicing that vary in the ways the pre-mRNA segments are removed or retained in the mature mRNA. The first...
21.1K
Nonsense-mediated mRNA Decay
10.6K
The Upf proteins that carry out nonsense-mediated decay (NMD) are found in all eukaryotic organisms, including humans. Each protein has an individual role, but they need to work in collaboration. Upf1 is an ATP-dependent RNA helicase that unwinds the RNA helix. Because Upf1 can unwind any RNA, Upf2 and Upf3 are required to help Upf1 discriminate between nonsense and normal mRNAs.
Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...
Usually, Upf3 binds to an Exon Junction Complex (EJC) at mRNA splice sites. If a ribosome fully translates the mRNA,...
10.6K
Notch Signaling Pathway
4.3K
The Notch signaling pathway is a major intracellular signaling pathway that is highly conserved over a broad spectrum of metazoan species. It stands unique from other intracellular signaling mechanisms in animals because notch protein itself acts as the receptor as well as the primary signaling molecule.
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not...
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not...
4.3K
Lysosomal Hydrolases
3.8K
Lysosomes are the site for the degradation of macromolecules and biological polymers released during membrane trafficking events such as secretory, endocytic, autophagic, and phagocytic pathways. The membrane-enclosed area of the lysosome, called the lumen, contains hydrolytic enzymes active in an acidic environment. These acid hydrolases are functional at a pH between 4.5 and 5 and are involved in cellular processes such as cell signaling, energy metabolism, restoration of the plasma membrane,...
3.8K


