相关实验视频

Updated: Jun 23, 2025

LDL Cholesterol Uptake Assay Using Live Cell Imaging Analysis with Cell Health Monitoring

LDL Cholesterol Uptake Assay Using Live Cell Imaging Analysis with Cell Health Monitoring

Published on: November 17, 2018

通过AMPK介导的内源胆固醇合成调节不会影响小鼠Pcsk9-AAV模型中的动脉样硬化

Tyler K T Smith¹, Peyman Ghorbani¹, Nicholas D LeBlond²

¹Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada; Centre for Infection, Immunity and Inflammation, Ottawa, ON, Canada; Ottawa Institute of Systems Biology, Ottawa, ON, Canada.

Atherosclerosis

|June 16, 2024

概括

在小鼠模型中,AMPK介导的胆固醇合成不会显著影响动脉样硬化进展. 这项研究强调了需要仔细选择动脉样硬化研究的临床前模型.

科学领域:

心血管生物学心血管生物学
代谢性疾病研究研究
动脉样硬化病原体的产生

背景情况:

失调的胆固醇代谢是动脉样硬化心血管疾病的核心.
内源性胆固醇合成在动脉样硬化中的作用尚不清楚.
AMP激活蛋白激酶 (AMPK) 抑制HMG-CoA减少酶 (HMGCR),这是胆固醇合成中的一个关键酶.

研究的目的:

为了验证AMPK-HMGCR信号轴在动脉样硬化中的重要性.
通过使用具有功能性ApoE的非生殖系高胆固醇血清模型,研究受损AMPK-HMGCR信号对动脉样硬化的影响.

主要方法:

HMGCR S871A敲进 (KI) 和野生型 (WT) 鼠通过Pcsk9功能增益病毒和16周的动脉质饮食进行了动脉样硬化诱导.
在骨髓衍生的巨细胞中评估了AMPK激活对胆固醇合成的影响.
分析了造血原体和免疫细胞表型,以及系统性炎症标志物.

主要成果:

AMPK激活抑制了WT中的胆固醇合成,但不是HMGCR KI巨细胞.
动脉硬性斑块区域和造血/免疫细胞表型在WT和HMGCR KI小鼠之间是相似的.
骨髓移植实验显示,斑块含量没有显著差异.

结论:

在这种模型中,AMPK介导的内源胆固醇合成控制可能对动脉样硬化发展不至关重要.
临床前模型选择对于精确的动脉样硬化研究至关重要.
需要进一步的研究来澄清胆固醇合成途径在动脉样硬化中的作用.

关键词:

这就是AMPKK.动脉样硬化是一种动脉样硬化.胆固醇胆固醇胆固醇在HMGCR中,HMGCR是最重要的.血液形成血液形成血液形成免疫代谢过程中的免疫代谢.炎症炎症是一种炎症.

更多相关视频

A High-Throughput Luciferase Assay to Evaluate Proteolysis of the Single-Turnover Protease PCSK9

A High-Throughput Luciferase Assay to Evaluate Proteolysis of the Single-Turnover Protease PCSK9

Published on: August 28, 2018

Quantification of Atherosclerosis in Mice

Quantification of Atherosclerosis in Mice

Published on: June 12, 2019

相关概念视频

Cholesterol: Significance and Regulation

Cholesterol: Significance and Regulation

Although not a source of energy, cholesterol plays a significant role as a foundational structure for bile salts, steroid hormones, and vitamin D, as well as being a crucial component of plasma membranes. Approximately 15% of blood cholesterol is derived from our diet, with the remainder synthesized from acetyl CoA by the liver and intestines. Cholesterol is eliminated from the body through its conversion into bile salts, which are eventually discarded in the feces.
Considering cholesterol and...

cAMP-dependent Protein Kinase Pathways

cAMP-dependent Protein Kinase Pathways

Cyclic Adenosine Monophosphate (cAMP) is an essential second messenger that activates protein kinase A (PKA) and regulates various biological processes. A single epinephrine molecule binds to GPCR and activates several heterotrimeric G proteins, each stimulating multiple adenylyl cyclase, amplifying the signal, and synthesizing large numbers of cAMP molecules. Small changes in cAMP concentration affect PKA activity. The binding of four cAMP molecules induces a conformational change in PKA,...