基因和基因通过环境相互作用效应在高维混合模型中的等级选择
Julien St-Pierre1, Karim Oualkacha2, Sahir Rai Bhatnagar1
1Department of Epidemiology, Biostatistics and Occupational Health, McGill University, Montreal, QC, Canada.
Statistical methods in medical research
|December 11, 2024
概括
这项研究引入了一种新的统计模型,用于识别复杂疾病中的基因环境相互作用. 该模型通过考虑共享的环境因素来提高准确性,减少基因分析中的错误发现.
科学领域:
- 遗传学 是一个遗传学.
- 生物统计学 生物统计学
- 流行病学 流行病学
背景情况:
- 基因与环境的相互作用在常见疾病病因学中至关重要.
- 现有的模型缺乏将人口结构或共享环境的随机效应纳入的能力.
- 基因与环境相互作用的层次选择需要强大的统计方法.
研究的目的:
- 在稀疏的规范化混合模型中开发一种统一的基因环境相互作用效应等级选择方法.
- 将人口结构和共享环境暴露的随机效应纳入其中.
- 将拟议模型的性能与现有方法进行比较.
主要方法:
- 开发了一种统一的方法,使用规范化处罚准概率估计.
- 在稀疏的规范化混合模型中实施基因环境相互作用效应的层次选择.
- 纳入随机效应以考虑人口结构和共享环境暴露.
主要成果:
- 拟议的模型,与共享环境暴露的额外随机效应,显著降低了假阳性和错误发现率.
- 该模型在识别重要的基因环境相互作用方面表现出优异的性能,与模拟中的现有方法相比.
- 适用于耳鼻面部疼痛:前性评估和风险评估 (OPPERA) 研究成功识别了之前报告的显著遗传位置.
结论:
- 开发的稀疏规范混合模型有效地识别了基因环境相互作用,同时考虑到人口结构和共享环境.
- 包括共享环境暴露的随机效应提高了基因环境相互作用和主要效应选择的准确性.
- 该方法在复杂疾病研究中显示出实际应用的前景,正如OPPERA研究结果所证明的那样.
相关概念视频
Gene-Environment Interactions
250
Gene expression is a dynamic process that is significantly influenced by environmental factors. This interaction underlies the complex nature of biological development and the phenotypic differences observed among individuals, even among those with identical genetic makeups. Factors such as radiation, temperature, behavior, nutrition, and stress play pivotal roles in determining how genes are expressed. The concept of the reaction range is central to understanding this interaction. It posits...
250
Background and Environment Affect Phenotype
6.5K
Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
6.5K
Behavioral Genetics and Its Designs
328
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...
328
Heritability
192
Heritability is a statistical concept that measures the degree to which genetic differences among individuals contribute to trait variations within a population. It is a fundamental idea in genetics, often prone to misinterpretation. Heritability is expressed as a percentage, reflecting the proportion of variation in a specific trait across a population that can be linked to genetic differences. However, it's important to understand that heritability does not determine how "genetic"...
192
Epistasis Analysis
4.9K
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...
4.9K
Polygenic Traits
64.8K
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...
64.8K


