在肝脏疾病中,氨酶系统的作用
Mary S McGrath1, Brian J Wentworth2
1Department of Medicine, School of Medicine, University of Virginia, Charlottesville, VA 22903, USA.
International journal of molecular sciences
|June 19, 2024
概括
氨酸 - 血管素系统 (RAS) 通过影响纤维化和门性高血压,影响肝病. 阻碍RAS的抑制作用
科学领域:
- 心血管科学 心血管科学
- 肝病学 肝病学是一种肝病学.
- 脏生理学 脏生理学
背景情况:
- 传统上,氨酸 - 血管素系统 (RAS) 调节血液循环和电解质平衡.
- 慢性肝损伤会破坏RAS的平衡,从而导致脊柱血管扩张.
- 在肝脏疾病中,RAS显著影响肝纤维化和门性高血压.
研究的目的:
- 审查当前对氨酸- ангиотензин系统在肝脏疾病中的作用的理解.
- 要突出肝损伤中RAS调制的复杂性.
- 为了确定不确定性和未来的研究方向在肝病中RAS的领域.
主要方法:
- 对RAS和肝脏疾病研究的文献综述.
- 分析传统和替代RAS路径.
- 综合当前关于慢性肝病中RAS抑制的研究.
主要成果:
- 在肝脏疾病中,RAS在功能之外发挥了多方面的作用.
- 另一种RAS途径有助于其在肝脏中的影响的复杂性.
- 在肝病中RAS抑制的有效性取决于背景.
结论:
- RAS是肝病进展的关键因素,影响纤维化和门性高血压.
- 需要进一步的研究来澄清RAS的作用和优化治疗策略.
- 了解RAS"再平衡"是管理肝病和降低死亡率的关键.
相关概念视频
Antihypertensive Drugs: Angiotensin-Converting Enzyme Inhibitors
611
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...
611
Antihypertensive Drugs: Direct Renin Inhibitors
567
The renin-angiotensin-aldosterone system (RAAS) is an intricate physiological pathway involving numerous enzymes and hormones, including renin, angiotensin-converting enzyme (ACE), angiotensin I and II, and aldosterone. Imbalances within this system increase the production of angiotensin II and aldosterone. Increased angiotensin II levels promote vasoconstriction and blood pressure elevation. Concurrently, higher aldosterone levels stimulate sodium and water reabsorption in the kidneys,...
567
Heart Failure Drugs: Inhibitors of Renin-Angiotensin System
420
The activation of the sympathetic nervous system and the renin-angiotensin-aldosterone system (RAAS) contributes to cardiac remodeling, and inhibiting the RAAS is a pharmacological target in heart failure management. As a result, neurohumoral modulation is a crucial treatment principle for managing heart failure. This approach involves using medications like ACE inhibitors (ACEIs), angiotensin receptor blockers (ARBs), β-blockers, mineralocorticoid receptor antagonists (MRAs), and neutral...
420
Hormonal Regulation
33.1K
The renin-aldosterone system is an endocrine system which guides the renal absorption of water and electrolytes, thus managing blood pressure and osmoregulation. Activation of the system begins in the kidneys with a small cluster of cells adjacent to the afferent and efferent blood vessels of the renal corpuscle. As the nephrons are filtering blood, juxtaglomerular cells monitor blood pressure. If they detect a decrease in pressure, they release the hormone renin into the bloodstream.
33.1K
Antihypertensive Drugs: Angiotensin II Receptor Blockers
706
In the renin-angiotensin-aldosterone system, a hormone called angiotensin II plays a crucial role. It binds to the AT1 receptors in vascular smooth muscles coupled with Gq proteins. The activation of these receptors activates an enzyme called phospholipase C, which releases two molecules: inositol trisphosphate and diacylglycerol. These molecules cause a chain reaction that leads to the phosphorylation of myosin light chains and promotes interaction between actin and myosin, leading to smooth...
706
Introduction to Urinary System
2.4K
The urinary system consists of two kidneys, two ureters, the urinary bladder, and the urethra.
The kidneys are bean-shaped organs located in the retroperitoneal space, on either side of the vertebral column, between the T12 and L3 vertebrae. They are partially protected by the rib cage and surrounded by perirenal fat, which provides cushioning. They are responsible for urine formation and play critical roles in regulating blood pressure, electrolyte levels, and hormone production. The ureters...
The kidneys are bean-shaped organs located in the retroperitoneal space, on either side of the vertebral column, between the T12 and L3 vertebrae. They are partially protected by the rib cage and surrounded by perirenal fat, which provides cushioning. They are responsible for urine formation and play critical roles in regulating blood pressure, electrolyte levels, and hormone production. The ureters...
2.4K


