转基因分析揭示了DNA甲基化和转录因子在肥胖肝脏蛋白质表达中的作用
Hideki Maehara1, Atsushi Hatano1,2, Masaki Shirai1
1Department of Biological Sciences, Graduate School of Science, The University of Tokyo, Tokyo, Japan.
NPJ systems biology and applications
|November 19, 2025
概括
肥胖通过改变蛋白质表达来改变肝功能. 虽然转录因子的变化是关键的,但肥胖肝脏的特定蛋白质减少与DNA甲基化和减少Hnf4a有关.
科学领域:
- 分子生物学分子生物学
- 基因组学就是基因组学.
- 蛋白质组学是指蛋白质组学.
背景情况:
- 肥胖通过异常的蛋白质表达来破坏肝功能.
- 基因甲基化和转录因子 (TF) 表达变化是潜在的机制.
- 在肥胖中,DNA甲基化和蛋白质表达之间的确切联系尚未完全理解.
研究的目的:
- 研究DNA甲基化,TF结合和肥胖肝脏中的蛋白质表达变化之间的关联.
- 区分DNA甲基化和TF表达在肥胖引起的肝脏改变中的作用.
主要方法:
- 采用了一种跨经济一体化方法.
- 结合了来自野生型 (WT) 和肥胖 (ob/ob) 鼠肝的DNA甲基组,转录组,蛋白质组和TF结合数据.
- 分析了表观遗传和转录因子对蛋白质表达变化的相对贡献.
主要成果:
- 在肥胖中,基因和蛋白质表达的变化与TF表达的变化比促进者DNA甲基化更强烈相关.
- 补充和凝血系统蛋白质的特定减少与增加的DNA甲基化和减少Hnf4a表达有关.
- 确定了与DNA甲基化和TF表达与异常蛋白质水平相关的独特分子特征.
结论:
- 肥胖引起的肝功能障碍涉及蛋白质表达的复杂变化.
- DNA甲基化和转录因子表达都起作用,TF表达是整体变化更强的相关因子.
- 特定的蛋白质变化,如补体和凝血系统中的变化,与表观遗传修饰和关键TF失调有独特的联系.
更多相关视频
09:20An Adipocyte Cell Culture Model to Study the Impact of Protein and Micro-RNA Modulation on Adipocyte Function
Published on: May 4, 2021
4.2K
06:08Author Spotlight: Semi-Automated Isolation of the Stromal Vascular Fraction from Murine White Adipose Tissue Using a Tissue Dissociator
Published on: May 19, 2023
2.8K
相关概念视频
Cell Specific Gene Expression
16.2K
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...
16.2K
Epigenetic Regulation
3.7K
Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
X-chromosome...
X-chromosome...
3.7K
Epigenetic Regulation
33.4K
Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
33.4K
Pharmacokinetics in Obese Patients: Drug Metabolism and Excretion
162
Drug metabolism, a critical process in the liver, involves two primary phases: Phase I reactions and Phase II conjugation. Obesity introduces significant alterations in this metabolic process, primarily due to fatty infiltration of the liver, leading to conditions such as nonalcoholic fatty liver disease (NAFLD). This condition can modify the activities of both Phase I and II enzymes, impacting how drugs are metabolized in obese patients.Phase I metabolism sees variable effects across...
162
Genomic Imprinting and Inheritance
36.7K
Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes.
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
36.7K
General Transcription Factors
6.7K
Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
6.7K
