レニン・アニオテンシン・アルドステロン系 (RAAS): 心血管の調節を超えた
Agnese Valentini1, Romy M Heilmann2, Anna Kühne2
1School of Biosciences and Veterinary Medicine, University of Camerino, Via Circonvallazione, 93, 62024 Matelica, Italy.
Veterinary sciences
|August 28, 2025
まとめ
レニン・アニオテンシン・アルドステロン系 (RAAS) は,心血管の健康,炎症,および線維症に影響します. 特定のRAAS経路をターゲットにすることで,人間や動物の様々な病気を治療する可能性を秘めています.
科学分野:
- 心血管の生理学
- 免疫学
- 腫瘍学
背景:
- レニン・アニオテンシン・アルドステロン系 (RAAS) は,血圧と水分バランスのために不可欠です.
- 新しい証拠は,RAASが炎症,線維症,免疫調節,がんに関与していることを示しています.
- RAASは心臓血管機能を超えて,様々な臓器系に影響を与えます.
研究 の 目的:
- 古典的および代替RAAS経路の包括的な見直しを提供する.
- アンジオテンシンII (アンジオテンシンII) とアンジオテンシン-1-7 (アンジオテンシン1-7) が特定の受容体を通して果たす二重の役割を明らかにする.
- 病気のメカニズムと治療戦略に RAAS 調節の影響を調査する.
主な方法:
- RAAS経路とシグナルに関する既存の文献のレビュー.
- 分子信号カスケード (ミトコンドリア,核,洞窟媒介) の分析.
- RAASの調節のための遺伝モデルと薬理学的戦略の検討.
主要な成果:
- アンジオテンシンII (AngII) とアンジオテンシン- 1〜7 (Ang1- 7) は,AT1R,AT2R,MasR,MrgD受容体によって二重な作用を示している.
- RAASの調節は肝繊維症,血管再構成,自己免疫性炎症に影響する.
- 組織特異的なRAAS作用は遺伝モデルと薬理学的介入によって実証されています.
結論:
- ACE2/Ang 1-7/Mas軸を強化し,同時に ACE/Ang II/AT1R経路を阻害することは治療に有望である.
- RAASの複雑性と受容体の交響を理解することは,新しい治療法の開発の鍵です.
- RAAS機能障害は,犬の慢性炎症性腸病などの状態に寄与し,獣医的な関連性を示します.
関連する概念動画
01:33Hormonal Regulation
33.7K
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.
33.7K
01:17Hormonal Regulation of Blood Pressure
3.1K
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...
3.1K
01:29Hypertension II: Pathophysiology
77
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,...
77
01:30Antihypertensive Drugs: Angiotensin-Converting Enzyme Inhibitors
871
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...
871
01:18Hypertension 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
01:18Neural Regulation of Blood Pressure
3.4K
The neural regulation of blood pressure involves intricate interactions between the autonomic nervous system (ANS) and cardiovascular system, ensuring adequate perfusion of tissues. This regulation primarily occurs through baroreceptor and chemoreceptor reflexes, involving both short-term and long-term mechanisms.
Baroreceptor Reflex
Baroreceptors, located in the carotid sinuses and aortic arch, detect changes in blood pressure. When blood pressure rises, these stretch-sensitive receptors...
Baroreceptor Reflex
Baroreceptors, located in the carotid sinuses and aortic arch, detect changes in blood pressure. When blood pressure rises, these stretch-sensitive receptors...
3.4K