富含GC的重复扩张:相关的障碍和机制
Christopher Schröder1, Bernhard Horsthemke1, Christel Depienne1
1Institute of Human Genetics, University Hospital Essen, University of Duisburg-Essen, Essen, Germany.
概括
富含GC的重复扩张会导致遗传障碍,通常会被标准测试遗漏. 需要特定的方法来检测这些扩张在调节基因区域,影响基因功能.
科学领域:
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
- 神经科学是一个神经科学.
背景情况:
- 非编码重复扩张是遗传疾病的重要原因,主要影响中枢神经系统.
- 标准的诊断技术往往无法检测到这些致病性重复扩张.
- 需要特定的分子和生物信息技术来识别它们.
研究的目的:
- 审查由富含GC的重复扩张引起的遗传疾病的临床和分子特征.
- 以突出使用常规诊断方法检测这些扩张的挑战.
- 专注于富含GC的重复扩张,这构成了已知的重复扩张障碍的很大一部分.
主要方法:
- 对非编码重复扩展的现有文献的审查,重点是富含GC的类型.
- 讨论诊断技术,包括重复启动PCR和生物信息学工具,如ExpansionHunter.
- 分析与这些扩张相关的分子机制 (功能获取,功能丧失).
主要成果:
- 富含GC的重复扩展至少占所有描述的非编码重复扩展的三分之一.
- 这些扩张主要位于基因调节区域 (促进体,5' UTR,第一个内核).
- 致病机制包括RNA毒性,重复关联的非AUG (RAN) 翻译和基因沉默,受扩张大小和甲基化状态的影响.
结论:
- 富含GC的重复扩张是遗传神经疾病的关键原因,但经常被忽视.
- 先进的检测方法对于准确诊断与这些扩张相关的疾病至关重要.
- 了解它们的位置,大小和甲基化是阐明它们致病作用的关键.
相关概念视频
Human Genetics
559
Human genetics provides a profound framework for understanding the interplay between genetic predispositions and human psychology. At the heart of this discipline lies the study of how genes influence physical traits, behaviors, and susceptibility to diseases. Each person carries a unique genetic code that subtly or significantly shapes their psychological and behavioral landscape.
The complex relationship between genetics and psychology is observable through common biological components such...
The complex relationship between genetics and psychology is observable through common biological components such...
559
Exon Recombination
3.6K
The evolution of new genes is critical for speciation. Exon recombination, also known as exon shuffling or domain shuffling, is an important means of new gene formation. It is observed across vertebrates, invertebrates, and in some plants such as potatoes and sunflowers. During exon recombination, exons from the same or different genes recombine and produce new exon-intron combinations, which might evolve into new genes.
Exon shuffling follows “splice frame rules.” Each exon...
Exon shuffling follows “splice frame rules.” Each exon...
3.6K
Genome-wide Association Studies-GWAS
13.3K
Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
GWAS does not require the identification of the target gene involved in...
GWAS does not require the identification of the target gene involved in...
13.3K
Cohesins
4.5K
Cohesin protein complexes are a molecular glue that holds two sister chromatids together. They play an important role both in mitosis and meiosis. In mitosis, all cohesin complexes present on the chromosomes are removed before the start of the anaphase stage.
Cohesin complexes in Meiotic Division
Meiosis involves two distinct rounds of chromosomal segregation and cell divisions— Meiosis I followed by Meiosis II – producing four daughter cells. Meiosis I includes the separation of...
Cohesin complexes in Meiotic Division
Meiosis involves two distinct rounds of chromosomal segregation and cell divisions— Meiosis I followed by Meiosis II – producing four daughter cells. Meiosis I includes the separation of...
4.5K
Gene Conversion
9.7K
Other than maintaining genome stability via DNA repair, homologous recombination plays an important role in diversifying the genome. In fact, the recombination of sequences forms the molecular basis of genomic evolution. Random and non-random permutations of genomic sequences create a library of new amalgamated sequences. These newly formed genomes can determine the fitness and survival of cells. In bacteria, homologous and non-homologous types of recombination lead to the evolution of new...
9.7K
Sex-linked Disorders
102.0K
Like autosomes, sex chromosomes contain a variety of genes necessary for normal body function. When a mutation in one of these genes results in biological deficits, the disorder is considered sex-linked.
102.0K


