The renin-angiotensin-aldosterone system: Role in pathogenesis and potential therapeutic target in COVID-19

Cássia L Braga1, Rodrigo P Silva-Aguiar2, Denise Battaglini3

  • 1Laboratory of Pulmonary Investigation, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil.

Insights

Understanding coronavirus disease 2019 (COVID-19) pathogenesis is crucial due to high fatality rates and lack of treatments. This review explores COVID-19 pathways and therapeutic targets, emphasizing the renin-angiotensin-aldosterone system.

Area of Science:

  • Virology
  • Immunology
  • Cardiovascular Research

Background:

  • Coronavirus disease 2019 (COVID-19), caused by SARS-CoV-2, presents a global health crisis with significant mortality.
  • The lack of specific vaccines and therapeutics underscores the urgent need to understand COVID-19 pathogenesis.
  • Unique characteristics of SARS-CoV-2 pose challenges for clinical management compared to SARS-CoV.

Purpose of the Study:

  • To elucidate the complex mechanisms underlying COVID-19 infection and pathogenesis.
  • To identify potential therapeutic targets for COVID-19 treatment.
  • To highlight the critical role of the renin-angiotensin-aldosterone system in COVID-19.

Main Methods:

  • Review of existing literature on SARS-CoV-2, COVID-19, and the renin-angiotensin-aldosterone system.
  • Analysis of proposed molecular pathways involved in viral entry and replication.
  • Examination of the interplay between SARS-CoV-2 and host cellular machinery.

Main Results:

  • COVID-19 pathogenesis involves intricate interactions between the virus and host systems.
  • The renin-angiotensin-aldosterone system is implicated as a key player in disease progression.
  • Specific viral proteins and host factors are identified as potential therapeutic targets.

Conclusions:

  • A comprehensive understanding of COVID-19 pathogenesis is essential for developing effective treatments.
  • Targeting the renin-angiotensin-aldosterone system may offer a promising therapeutic strategy.
  • Further research into viral-host interactions can accelerate the development of novel interventions for COVID-19.

Related Concept Videos

Antihypertensive Drugs: Direct Renin Inhibitors01:25

Antihypertensive Drugs: Direct Renin Inhibitors

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,...
1.1K
Hormonal Regulation01:33

Hormonal Regulation

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.
35.3K
Heart Failure Drugs: Inhibitors of Renin-Angiotensin System01:26

Heart Failure Drugs: Inhibitors of Renin-Angiotensin System

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...
773
Antihypertensive Drugs: Angiotensin-Converting Enzyme Inhibitors01:30

Antihypertensive Drugs: Angiotensin-Converting Enzyme Inhibitors

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...
2.1K
Hypertension II: Pathophysiology01:29

Hypertension II: Pathophysiology

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,...
584
Antihypertensive Drugs: Angiotensin II Receptor Blockers01:30

Antihypertensive Drugs: Angiotensin II Receptor Blockers

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...
2.2K