一种新的罕见变体关联测试,通过copula通过基于家族的设计中的二进制特征
Houssou R G Dossa1, Alexandre Bureau2,3, Michel Maziade3,4
1Département de Mathématiques, Université du Québec à Montréal (UQAM) et, Québec, Canada.
Statistical methods in medical research
|October 13, 2023
概括
一种新的统计方法,新型罕见变异关联测试 (NRVAT),有效地使用家族数据分析二进制特征的遗传关联. 这种方法增强了识别与复杂疾病相关的遗传变异的能力.
科学领域:
- 遗传学 遗传学 是一个
- 生物统计学 生物统计学
- 统计遗传学 统计遗传学
背景情况:
- 全基因组测序的成本效益推动了对先进的遗传关联测试方法的需求.
- 基于基因的方法,如序列内核关联测试扩展,群体变异,但通常使用混合模型来确定家族关系.
- 现有的方法需要更灵活的方法来分析罕见和常见变异的集合,特别是对二进制结果和家族数据的分析.
研究的目的:
- 开发一种统一和灵活的基于家族的二进制特征关联测试,以适应罕见和常见的遗传变异.
- 引入一种新的方法,通过使用copulas有效地建模家庭依赖结构.
- 提高基因关联研究的统计能力,使用基于家庭的队列.
主要方法:
- 提出了一种使用边际物流模型的新型罕见变异关联测试 (NRVAT).
- 在家庭数据中使用高斯方针来捕捉亲属之间的依赖结构.
- 导出了分析性得分类型测试,用于有效的统计推理.
主要成果:
- 模拟表明,与现有方法相比,NRVAT实现了更大的统计能力.
- 该方法成功应用于分析家族队列中精神分裂症和双相情感障碍的遗传关联.
- 斯的Copula有效地模拟了对二进制特征的家族依赖.
结论:
- NRVAT为基于家族的基因关联研究提供了一个灵活而强大的框架,具有二进制结果.
- 该方法在同时分析罕见和常见变异方面提供了进步.
- 这种方法对理解复杂疾病 (如精神分裂症和双相情感障碍) 的遗传基础具有重要意义.
更多相关视频
11:35Screening for Functional Non-coding Genetic Variants Using Electrophoretic Mobility Shift Assay EMSA and DNA-affinity Precipitation Assay DAPA
Published on: August 21, 2016
13.0K
08:27Large-Scale Multi-Omics Genome-Wide Association Studies Mo-GWAS: Guidelines for Sample Preparation and Normalization
Published on: July 27, 2021
3.7K
相关概念视频
Genome-wide Association Studies-GWAS
13.5K
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...
13.5K
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
Behavioral Genetics and Its Designs
381
Behavior genetics explores how genetic inheritance influences human behavior. It focuses on how genes, passed from parents to offspring, contribute to the development of behavioral traits and tendencies. This branch of genetics seeks to understand the complex interplay between inherited genetic factors and environmental influences in shaping our behaviors.
The primary methodologies used in behavior genetics include family studies, twin studies, and adoption studies, each providing unique...
The primary methodologies used in behavior genetics include family studies, twin studies, and adoption studies, each providing unique...
381
Polygenic Traits
66.0K
When more than one gene is responsible for a given phenotype, the trait is considered polygenic. Human height is a polygenic trait. Studies have uncovered hundreds of loci that influence height, and there are believed to be many more. Due to the high number of genes involved, as well as environmental and nutritional factors, height varies significantly within a given population. The distribution of height forms a bell-shaped curve, with relatively few individuals in the population at the...
66.0K
Single Nucleotide Polymorphisms-SNPs
15.2K
A single nucleotide polymorphism or SNP is a single nucleotide variation at a specific genomic position in a large population. It is the most prevalent type of sequence variation found in the human genome. Point mutations that occur in more than 1% of the population qualify as SNPs. These are present once every 1000 nucleotides on an average in the human genome. Replacement of a purine with another purine (A/G) or a pyrimidine with another pyrimidine (C/T) is known as a transition. In contrast,...
15.2K
Genetic Variation
297
Genetic variation is the diversity in DNA sequences found among individuals of the same species. This diversity is crucial for a species' survival because it helps organisms adapt to environmental changes. Genetic variation begins with fertilization, where an egg and sperm cell merge. Each of these cells carries 23 chromosomes, up to 46 in the fertilized egg. Chromosomes are long DNA strands that contain genes, the basic units of heredity.
Genes exist in different versions called alleles,...
Genes exist in different versions called alleles,...
297
