流量敏感的HEG1控制eNOS活动,以预防内皮功能障碍,高血压和动脉样硬化
Michael D Clark1,2, Yerin Kim1, Cesar A Romero3
1Wallace H. Coulter Department of Biomedical Engineering, Georgia Institute of Technology and Emory University, Atlanta, GA, United States.
bioRxiv : the preprint server for biology
|July 16, 2025
概括
玻璃心1 (HEG1) 蛋白通过控制氧化 (NO) 的生物可用性来调节血压和动脉样硬化. 较低的HEG1水平与高血压和心血管疾病风险有关,表明其作为治疗点的潜力.
科学领域:
- 心血管生物学 心血管生物学
- 内皮细胞生物学 内皮细胞生物学
- 分子医学是分子医学.
背景情况:
- 高血压 (HTN) 是动脉样硬化心血管疾病的主要危险因素.
- 稳定的血流 (s-流) 通常促进动脉保护性内皮细胞 (EC) 功能,包括氧化 (NO) 生产.
- 玻璃心1 (HEG1) 在EC功能中的作用及其与动脉样硬化的联系以前是未知的.
研究的目的:
- 研究HEG1在内皮细胞 (EC) 功能障碍,高血压和动脉样硬化中的新型作用.
- 阐明HEG1影响这些条件的机制.
- 探索HEG1作为心血管疾病风险的潜在生物标志物.
主要方法:
- 使用内皮细胞特异性淘汰 (ECKO) 的Heg1.1小鼠模型.
- 研究了HEG1和内皮氧化合成酶 (eNOS) 之间的相互作用.
- 在英国BioBank和瑞典队列研究中分析了血HEG1水平.
主要成果:
- 内皮细胞特异性Heg1 (Heg1ECKO) 的淘汰会导致自发高血压和恶化的动脉样硬化.
- HEG1通过与eNOS的流量依赖相互作用来调节NO的生物可用性.
- 在Heg1ECKO小鼠中,ACE抑制有效治疗高血压和动脉样硬化.
- 血HEG1水平与人类队列中的高血压和心血管疾病风险有关.
结论:
- HEG1在维持内皮细胞功能和预防高血压和动脉样硬化方面发挥着至关重要的作用.
- HEG1通过与eNOS的相互作用来调节NO的生物可用性,通过血液流动调节.
- HEG1代表了心血管疾病的潜在生物标志物,也是个性化治疗的目标.
相关概念视频
Regulation of Angiogenesis and Blood Supply
2.7K
Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits. Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl...
2.7K
Hormonal Regulation of Blood Pressure
3.2K
Endocrinal or hormonal intervention in the cardiovascular system is predominantly exerted by the catecholamines - epinephrine and norepinephrine, as well as a slew of hormones that interact with renal function to modulate blood volume.
Epinephrine and Norepinephrine
The adrenal medulla releases epinephrine and norepinephrine, catecholamines that enhance and extend the sympathetic or "fight or flight" physiological response. These hormones escalate heart rate and the force of contraction...
Epinephrine and Norepinephrine
The adrenal medulla releases epinephrine and norepinephrine, catecholamines that enhance and extend the sympathetic or "fight or flight" physiological response. These hormones escalate heart rate and the force of contraction...
3.2K
Autoregulation of Blood Flow
2.8K
Autoregulation mechanisms are characterized by their inherent capacity for self-regulation without necessitating specific nervous stimulation or endocrine control. These mechanisms facilitate the adjustment of blood flow and, therefore, perfusion specific to each tissue region. This self-regulation encompasses chemical signals and myogenic controls.
Chemical Signaling in Autoregulation
Chemical signaling operates at the precapillary sphincter level, inciting either contraction or relaxation....
Chemical Signaling in Autoregulation
Chemical signaling operates at the precapillary sphincter level, inciting either contraction or relaxation....
2.8K
Hypertension II: Pathophysiology
88
Hypertension is a chronic condition in which the blood's force against artery walls is excessively high, posing risks such as heart disease. The condition's underlying mechanisms involve complex interactions among the cardiovascular, kidney, and autonomic nervous systems.Renin-Angiotensin-Aldosterone System (RAAS): This system significantly influences blood pressure regulation. When blood pressure decreases, the kidneys secrete renin. This enzyme transforms angiotensinogen, a plasma protein,...
88
Hypertension and Regulation of Blood Pressure
3.1K
Hypertension, the most common cardiovascular disease, is diagnosed through repeated measurements of elevated blood pressure. Its risks, including damage to the kidney, heart, and brain, are directly proportional to blood pressure levels. Starting from 115/75 mm Hg, the risk of cardiovascular disease doubles with each increment of 20/10 mm Hg. The diagnosis relies on blood pressure measurements, not on patient symptoms, as hypertension is often asymptomatic until end-organ damage is imminent or...
3.1K
Antihypertensive Drugs: Angiotensin-Converting Enzyme Inhibitors
892
Angiotensin-converting enzyme (ACE), a vital component of the renin-angiotensin-aldosterone system, is abundant in lung endothelial cells. ACE converts the inactive decapeptide, angiotensin I, into the active octapeptide, angiotensin II. This potent vasoconstrictor narrows blood vessels, increasing resistance to blood flow and elevating blood pressure. Angiotensin II also stimulates aldosterone production, encouraging kidney cells to reabsorb more sodium and water from urine, thereby increasing...
892


