血液DNMT3A减少和高脂肪饮食协同促进体重增加和组织炎症
Jaime M Reyes1,2,3, Ayala Tovy1,2, Linda Zhang1,2,4,5
1Stem Cells and Regenerative Medicine Center, Baylor College of Medicine, Houston, TX, USA.
iScience
|February 28, 2024
概括
血造干细胞中DNA甲基转移酶3A (DNMT3A) 的减少,结合高脂肪饮食,导致小鼠的体重增加和炎症. 这表明DNMT3A损失有助于代谢障碍.
科学领域:
- 血液学 血液学 血液学
- 免疫学 免疫学 免疫学
- 代谢性疾病是一种代谢性疾病.
背景情况:
- 衰老导致克隆性造血,其中少数造血干细胞 (HSC) 克隆主导血液生产.
- 克隆性血液形成的有害影响与分化后代有关,但机制尚不清楚.
- 在DNA甲基转移酶3A (DNMT3A) 中的体质突变是HSC克隆主导的常见驱动因素.
研究的目的:
- 为了研究高脂肪饮食 (HFD) 与血液细胞中减少的DNMT3A之间的相互作用.
- 了解将改变的血液形成与代谢功能障碍联系在一起的机制.
主要方法:
- 用小鼠模型研究HFD和降低DNMT3A在造血细胞中的影响.
- 对基因表达,DNA甲基化和炎症途径的分析.
主要成果:
- 血液细胞中HFD和减少DNMT3A的组合导致显著的体重增加.
- 在突变细胞中,HFD放大了促炎途径,并对突变细胞中的炎症相关基因进行了上调.
- 骨髓细胞中异常的DNA甲基化促进了炎症并维持了干性基因.
结论:
- 血液细胞中DNMT3A的减少有助于体重增加,炎症和代谢功能障碍.
- 在HSC中DNMT3A的损失在代谢障碍的发展中起作用.
- 衰老环境和饮食相互作用,加剧HSCs遗传变化的影响.
相关概念视频
Atherosclerosis III: Management
741
Management of atherosclerosis involves an integrated strategy encompassing pharmacological treatment, surgical interventions, lifestyle changes, and nutrition therapy to address the multifactorial nature of the disease.Pharmacological TherapyA cornerstone of atherosclerosis management is the use of pharmacological agents. Statins, such as atorvastatin, are pivotal in inhibiting HMG-CoA reductase, an enzyme that catalyzes an initial step in cholesterol synthesis in the liver. This reduction in...
741
Type II Diabetes I: Introduction
17
Type 2 diabetes mellitus (T2DM) is a chronic metabolic disorder characterized by insulin resistance, in which target tissues such as the liver, muscle, and adipose tissue respond poorly to insulin. It is also associated with inadequate compensatory insulin secretion, where pancreatic β-cells fail to produce sufficient insulin. Together, these abnormalities lead to persistent hyperglycemia.EtiologyT2DM develops through a complex interaction of genetic predisposition and environmental or...
17
Inflammatory Bowel Disease III: Crohn's Disease
35
Crohn’s disease is a chronic, relapsing form of inflammatory bowel disease characterized by segmental, transmural inflammation that can affect any part of the gastrointestinal tract. Its pathogenesis arises from a combination of genetic susceptibility, environmental exposures, epithelial barrier dysfunction, and immune dysregulation. Together, these factors lead to an exaggerated immune response against components of the gut microbiome.Genetic and Environmental InfluencesMultiple genetic...
35


