在KMT2C的致病变体导致神经发育障碍不同于Kleefstra和Kabuki综合征
Dmitrijs Rots1, Sanaa Choufani2, Victor Faundes3
1Department of Human Genetics, Radboud University Medical Center, Nijmegen, the Netherlands; Department of Clinical Genetics, Erasmus MC, Rotterdam, the Netherlands; Genetics Laboratory, Children's Clinical University Hospital, Riga, Latvia.
American journal of human genetics
|July 16, 2024
概括
新发现的KMT2C相关的神经发育障碍 (NDD) 呈现出明显的临床和表观遗传特征. 这项研究定义了条件的条件.
科学领域:
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
- 人类遗传学 人类遗传学
- 发展生物学 发展生物学
背景情况:
- KMT2C和KMT2D是关键的表观遗传修饰剂,参与H3K4甲基化.
- KMT2C哈普隆缺陷是最近发现的神经发育障碍 (NDD) 的原因,对其临床和分子谱的理解有限.
- 与KMT2C相关的NDD被提议指定为Kleefstra综合征2.
研究的目的:
- 确定与KMT2C相关的NDD的临床特征和分子谱.
- 为了建立KMT2C相关的NDD的DNA甲基化 (DNAm) 签名.
- 为了区分KMT2C相关的NDD与其他NDD,如Kleefstra和Kabuki综合征.
主要方法:
- 98名患有罕见KMT2C变异的个体的确诊.
- 使用27名受影响个体的样本生成KMT2CDNA甲基化 (DNAm) 签名.
- 对81名具有致病性/可能致病性变异的个体的临床数据分析.
- 使用PhenoScore对34名受影响个体的照片进行面部姿态分析.
主要成果:
- 在KMT2C中确定了75个具有蛋白质截断变异 (PTV) 的个体,其中~15%是遗传的.
- 开发了一个KMT2C DNAm签名,能够分类非截断变体.
- 与KMT2C相关的NDD的特征是发育迟缓,智力障碍,行为问题,低血压,和矮身.
- 费诺斯科尔分析显示,与KMT2C相关的NDD.KMT2C相关的NDD.KMT2C与KMT2C相关的NDD.KMT2C相关的NDD.KMT2C与KMT2C相关的NDD.KMT2C相关的NDD.
- 与KMT2C相关的NDD被证明是临床和表观遗传学上不同于Kleefstra和Kabuki综合征.
结论:
- 与KMT2C相关的NDD具有定义的临床和分子谱.
- 一个KMT2C DNAm签名有助于变体解释和诊断.
- 与KMT2C相关的NDD是一个与Kleefstra和Kabuki综合征不同的实体,支持该疾病的重新命名.
相关概念视频
Inborn Errors of Metabolism
153
Phenylketonuria (PKU) is a protein metabolism disorder characterized by high blood levels of the amino acid phenylalanine. This results from a mutation in the gene responsible for phenylalanine hydroxylase, an enzyme that converts phenylalanine into tyrosine. When this enzyme is deficient, phenylalanine builds up in the blood, leading to symptoms such as vomiting, rashes, seizures, growth deficiency, and severe mental retardation. An early diagnosis and a diet restricting phenylalanine intake...
153
Translation
141.8K
Lesson: Translation
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of...
Translation is the process of synthesizing proteins from the genetic information carried by messenger RNA (mRNA). Following transcription, it constitutes the final step in the expression of genes. This process is carried out by ribosomes, complexes of protein and specialized RNA molecules. Ribosomes, transfer RNA (tRNA), and other proteins produce a chain of amino acids—the polypeptide—as the end product of translation.
Translation Produces the Building Blocks of...
141.8K
Karyotyping
59.7K
Overview
59.7K
Comparing Copy Number Variations and SNPs
17.7K
Sequencing of the human genome has opened up several best-kept secrets of the genome. Scientists have identified thousands of genome variations that exist within a population. These variations can be a single nucleotide or a larger chromosomal variation.
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
Copy number variations or CNVs are the structural variations that cover more than 1kb of DNA sequence. The single nucleotide polymorphism (SNP), on the other hand, is a single nucleotide change or a point mutation that is found in more than 1%...
17.7K
Mutations
81.6K
Overview
81.6K


