全基因组研究揭示了肝脏脂肪含量的遗传风险因素
Yanni Li1,2,3, Eline H van den Berg1, Alexander Kurilshikov2
1Department of Gastroenterology and Hepatology, University of Groningen, University Medical Center Groningen, Groningen 9713 GZ, The Netherlands.
Genomics, proteomics & bioinformatics
|August 14, 2024
概括
这项研究使用全基因组关联研究确定了影响肝脏脂肪含量的新型遗传因素. 这些发现揭示了磁共振成像质子密度脂肪分数和脂肪肝指数之间的共同遗传结构,支持FLI作为人口级研究工具.
科学领域:
- 遗传学 遗传学 是一个
- 肝病学 肝病学是一种肝病学.
- 生物信息学是一种生物信息学.
背景情况:
- 与代谢相关的脂肪肝疾病 (MAFLD) 的易感性是复杂的,并未完全理解.
- 鉴定肝脏脂肪含量的遗传基础对于了解疾病病因和风险因素至关重要.
研究的目的:
- 通过两种非侵入性措施,对肝脏脂肪含量进行全基因组关联研究 (GWAS):MRI-PDFF和FLI.
- 分析这些肝脂肪含量表型之间的遗传性,遗传重叠和相似性.
- 为了确定与肝脏脂肪含量相关的新型遗传基因位点.
主要方法:
- 在英国生物库 (UKBB) 中对MRI-PDFF (n=16,050) 和FLI (n=388,701) 进行全基因组关联研究 (GWAS).
- 在UMCG遗传生命线倡议 (UGLI) 队列中的复制分析 (n=10,398).
- 对GWAS结果的元分析和遗传相关性计算 (rg).
主要成果:
- MRI-PDFF的GWAS确定了五个显著的位置,包括新型基因CREB3L1和GCM1,以及已知的位置PNPLA3,TM6SF2和APOE.
- FLI的GWAS确定了196个位置,其中49个在UGLI中复制,包括ZPR1和FTO的顶部信号.
- 在MRI-PDFF和FLI之间发现了显著的遗传相关性 (rg=0.5276),在FLI GWAS中也复制了新的MRI-PDFF信号.
结论:
- 确定了两个新的基因 (CREB3L1,GCM1) 用于MRI-PDFF和49个可复制的FLI位点.
- 尽管有不同的评估方法,但MRI-PDFF和FLI具有相当大的遗传结构.
- 在人口层面的研究中,FLI是一种可靠和可访问的方法,用于研究肝脏脂肪含量.
相关概念视频
Genome-wide Association Studies-GWAS
13.2K
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...
13.2K
Cell Specific Gene Expression
13.5K
Multicellular organisms contain a variety of structurally and functionally distinct cell types, but the DNA in all the cells originated from the same parent cells. The differences in the cells can be attributed to the differential gene expression. Liver cells, whose functions include detoxification of blood, production of bile to metabolize fats, and synthesis of proteins essential for metabolism, must express a specific set of genes to perform their functions. Gene expression also varies with...
13.5K
Polygenic Traits
65.6K
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...
65.6K
Human Genetics
551
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...
551
Overview of Lipid Metabolism
1.2K
Lipid metabolism is a crucial process in the human body that involves the synthesis and degradation of lipids. This process is essential for energy production, cell membrane formation, and hormone production, among other functions.
Lipolysis: The Breakdown of Lipids:
Lipolysis is the process of breaking down lipids, particularly triglycerides, into glycerol and fatty acids. This process typically occurs in the adipose tissue and is triggered by various hormones, including glucagon and...
Lipolysis: The Breakdown of Lipids:
Lipolysis is the process of breaking down lipids, particularly triglycerides, into glycerol and fatty acids. This process typically occurs in the adipose tissue and is triggered by various hormones, including glucagon and...
1.2K
Heritability
195
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"...
195


