揭示白质微观结构的遗传架构,通过未经监督的分数异构图的深度表示学习
medRxiv : the preprint server for health sciences
|July 9, 2025
概括
这项研究引入了一种新的深度学习方法 (UDR-WM),使用voxel-wise FA地图分析白质完整性. 由此产生的UDIP-FA特征显示出更高的遗传性,并与大脑疾病和认知特征有关.
科学领域:
- 神经成像是一种神经成像.
- 遗传学 遗传学 是一个
- 人工智能的人工智能
背景情况:
- 来自扩散MRI的微分异位性 (FA) 是白质 (WM) 完整性的关键标记.
- 传统的FA分析平均数据,可能缺少局部微结构变异,并限制遗传发现.
- 需要新的方法来捕获分布式WM完整性模式,以进行增强的遗传分析.
研究的目的:
- 开发一个深度学习框架 (UDR-WM) 来从voxel-wise FA地图中提取全面的大脑范围的FA特征 (UDIP-FA).
- 与传统的FA测量相比,评估UDIP-FA表型的遗传性和生物相关性.
- 研究WM完整性的遗传结构及其与大脑疾病和认知特征的关系.
主要方法:
- 利用一个深度学习框架 (UDR-WM) 处理voxel-wise的FA地图来生成无监督的深度集成表型 (UDIP-FA).
- 在UDIP-FA上进行了多变体全基因组关联研究 (GWAS),以确定显著的SNP和相关基因 (UFAG).
- 分析了质细胞中的UFAG表达,与疾病基因组重叠,与特征的遗传相关性和网络属性.
主要成果:
- 在UDIP-FA中,基于SNP的遗传性明显高于传统的FA表型.
- 在586个位点中确定了939个显著的SNP,映射到3480个UFAG,这些SNP富含星球细胞和寡细胞.
- UFAGs与精神分裂症和帕金森病的风险基因有很强的重叠,以及与认知特征和骨矿物质密度的遗传相关性.
结论:
- UDIP-FA代表了对白质完整性的敏感和可遗传的表型,增强了基因发现.
- 已识别的UFAG突出显示了质细胞和髓化通路在WM完整性和神经系统疾病中的作用.
- 这种框架使得WM架构的高分辨率遗传剖析及其与复杂的大脑和系统特征的联系成为可能.
相关概念视频
Karyotyping
Describing the number and physical features of chromosomes can reveal abnormalities that underlie genetic diseases. This description is facilitated by special staining techniques that produce a particular banding pattern on each chromosome. State-of-the-art techniques make this approach even more powerful, enabling the detection of individual genes that cause disease.A Simple Chromosome Staining Technique Provides Valuable Scientific InsightSome genetic diseases can be detected by looking at...
Inheritance of Chromatin Structures
Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying DNA...
Evolutionary Relationships through Genome Comparisons
Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
Synteny and Evolution
John H. Renwick first coined the term “synteny” in 1971, which refers to the genes present on the same chromosomes, even if they are not genetically linked. The species with common ancestry tend to show conserved syntenic regions. Therefore, the concept of synteny is nowadays used to describe the evolutionary relationship between species.
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral chromosome underwent...
Around 80 million years ago, the human and mice lineages diverged from the common ancestor. During the course of evolution, the ancestral chromosome underwent...
Epistasis Analysis
Although Mendel chose seven unrelated traits in peas to study gene segregation, most traits involve multiple gene interactions that create a spectrum of phenotypes. When the interaction of various genes or alleles at different locations influences a phenotype, this is called epistasis. Epistasis often involves one gene masking or interfering with the expression of another (antagonistic epistasis). Epistasis often occurs when different genes are part of the same biochemical pathway. The...
Modern Molecular Taxonomy
Advancements in molecular biology have revolutionized the identification and characterization of bacteria, with multiple methods leveraging DNA sequencing for enhanced precision. As sequencing technologies improve and costs decline, these approaches are increasingly used in clinical, environmental, and evolutionary studies.Multilocus Sequence Typing (MLST) examines several housekeeping genes, essential chromosomal genes encoding cellular functions, to distinguish strains. Approximately...


