相关实验视频

Updated: May 10, 2025

Phosphorus-31 Magnetic Resonance Spectroscopy: A Tool for Measuring In Vivo Mitochondrial Oxidative Phosphorylation Capacity in Human Skeletal Muscle

Phosphorus-31 Magnetic Resonance Spectroscopy: A Tool for Measuring In Vivo Mitochondrial Oxidative Phosphorylation Capacity in Human Skeletal Muscle

Published on: January 19, 2017

蛋白质O-GlcNAcylation和六基因酶线粒体解离驱动心力衰竭与保存的喷射分数

Yuki Tatekoshi¹, Amir Mahmoodzadeh¹, Jason S Shapiro¹

¹Feinberg Cardiovascular and Renal Research Institute and Department of Medicine (Cardiology), Northwestern University, Chicago, IL 60611, USA.

Cell metabolism

|April 23, 2025

概括

线粒体六基因酶-1 (HK1) 结合在内皮细胞中对于心力衰竭与保留射出分数 (HFpEF) 至关重要. 扰乱HK1的行为

科学领域:

心血管生物学心血管生物学
代谢调节代谢调节代谢调节
细胞生物化学细胞生物化学

背景情况:

保存喷射分数 (HFpEF) 的心力衰竭是一个重要的全球健康负担,其机制尚不清楚.
内皮细胞功能障碍越来越被认为是HFpEF病原发生的一个关键因素.
蛋白质O-GlcNAcylation是一种翻译后修饰,在各种细胞过程中发挥作用,但其在HFpEF中的具体参与尚不清楚.

研究的目的:

调查基-1 (HK1) 在内皮细胞 (EC) 中的线粒体结合在HFpEF的发展中的作用.
阐明连接HK1局部化,蛋白质O-GlcNAcylation和HFpEF病理生理学的机制.
根据这些发现,确定HFpEF的潜在治疗点.

主要方法:

为HFpEF开发和描述一种新的小鼠模型.
从HFpEF小鼠的EC中分析HK1细胞局部化和线粒体结合.
评估蛋白质O-GlcNAcylation水平和六胺生物合成途径.
在基因改造小鼠和治疗干预后评估血管生成和心脏功能.
使用了EC特定的淘汰/过度表达策略和药物抑制.

主要成果:

在EC中,HFpEF小鼠表现出HK1的线粒体位增加.
在小鼠中删除HK1线粒体结合域会重现HFpEF表型,并损害血管生成.
脱的HK1增强了O相关的N-乙糖胺转移酶 (OGT) 活性,增加了蛋白质O-GlcNAcylation.
欧盟特定的O-GlcNA病例过度表达或OGT抑制逆转了血管性缺陷,并改善了HFpEF表型.

结论:

在EC中HK1线粒体局部化对于调节蛋白质O-GlcNAcylation和HFpEF发育至关重要.
异常的HK1细胞定位代表了HFpEF背后的一种新机制.
向蛋白质O-GlcNAcylation为HFpEF提供了一个有前途的治疗策略.

关键词:

HFpEF HFpEF 的意思是什么意思这是一种O-GlcNAcylation.细胞内皮细胞的内皮细胞.六甲基酶 1 的作用.线粒体中的线粒体.

更多相关视频

Assessment of Cardiac Function and Energetics in Isolated Mouse Hearts Using 31P NMR Spectroscopy

Assessment of Cardiac Function and Energetics in Isolated Mouse Hearts Using 31P NMR Spectroscopy

Published on: August 31, 2010

A Flow Cytometry-based Assay for Measuring Mitochondrial Membrane Potential in Cardiac Myocytes After Hypoxia/Reoxygenation

A Flow Cytometry-based Assay for Measuring Mitochondrial Membrane Potential in Cardiac Myocytes After Hypoxia/Reoxygenation

Published on: July 13, 2018

相关概念视频

Pathophysiology of Heart Failure

Pathophysiology of Heart Failure

Heart failure (HF) is a progressive syndrome involving ventricles that leads to inadequate cardiac output. It can be classified based on location and output or ejection fraction. Ejection fraction (EF) is an essential measurement in the diagnosis and surveillance of HF. Reduced EF corresponds to systolic heart failure (HFrEF). However, HF with preserved ejection fraction (HFpEF) is becoming increasingly prevalent. Also known as diastolic HF, this form of HF is related to aging. The...

Heart Failure Drugs: Inotropic Agents

Heart Failure Drugs: Inotropic Agents

Positive inotropic agents are commonly used as the first line of treatment for heart failure. One such agent is digoxin, derived from the genus Digitalis, which has been known for centuries but effectively utilized since 1785. However, these cardiac glycosides can have potentially toxic effects due to their mechanism of action, which involves inhibiting Na+/K+-ATPase and increasing contractility. Digoxin is absorbed orally and distributed in various tissues, including the CNS. It has a long...