関連する実験動画
Updated: Jul 15, 2026

07:36
Angiogenesis in the Ischemic Rat Lung
Published on: February 8, 2013
低血症による冠状動脈の付随成長は,血管内皮成長因子と酸化窒素に依存しています
T Matsunaga1, D C Warltier, D W Weihrauch
1Departments of Physiology and Anesthesiology, The Cardiovascular Research Center, Medical College of Wisconsin, Milwaukee, USA.
Circulation
|January 11, 2000
まとめ
酸化窒素 (NO) は,イシュケミアと血管内皮成長因子 (VEGF) によって誘発される冠動脈の付随成長を刺激するために不可欠です. VEGFによって誘発された担保は,NOの生産を必要とします.
科学分野:
- 心血管生物学 心血管生物学
- 分子医学は分子医学である.
- イシュケミア 研究 イシュケミア 研究
背景:
- イシュミアは,血管内皮成長因子 (VEGF) の発現を誘発する可能性があります.
- 酸化窒素 (NO) の生成は,冠動脈の付随成長の刺激に関与しています.
- VEGF,NO,および担保の相互作用については,さらなる調査が必要である.
研究 の 目的:
- イシュケミア誘発冠動脈の副産物増殖におけるNOの役割を調査する.
- VEGFの発現とNOの生成が,付随の成長を刺激するために不可欠であるかどうかを判断する.
- 筋動脈不全に対する反応として,VEGF誘導とNOシグナリングの関係を解明する.
主な方法:
- 繰り返しの心筋動脈不全症の犬のモデルを使用した.
- 冠動脈の付随の血流は,微球を用いて測定した.
- VEGF発現は,ウエスタン分析とRT-PCRにより,心筋間液で定量化されました.
- 酸化窒素合成酵素は,N(G) -ニトロ-L-アルギニンメチルエステル (L-NAME) を使用して反抗されました.
主要な成果:
- 繰り返し発症するイシュケミアは,対照犬の付随の血流を漸進的に増加させた.
- NO合成酵素とL-NAMEの対抗性は,付随の血流の増加を廃止しました.
- VEGF発現はコントロール群の初期にピークに達したが,L-NAMEで治療された犬のイシュケミア全体で上昇したままでした.
- 反応性高血症は,イシュケミアの重症性を示すもので,対照群における付随性の増加に伴い減少したが,NOが阻害されたときには堅調なままだった.
結論:
- 酸化窒素 (NO) は,冠動脈の副産物発達の重要な調節剤である.
- イシュミアはVEGFの発現を誘発し,これは副次発達の重要な要因である.
- VEGF誘発の冠動脈連鎖化のプロセスは,同時に NO の生成に依存しています.
関連する概念動画
Paracrine Signaling
Paracrine signaling allows cells to communicate with their immediate neighbors via secretion of signaling molecules. Such a signal can only trigger a response in nearby target cells because the signal molecules degrade quickly or are inactivated if not taken up. Prominent examples of paracrine signaling include nitric oxide signaling in blood vessels, synaptic signaling of neurons, the blood clotting system, tissue repair/wound healing, and local allergic skin reactions. Nitric oxide as a...
Mechanism of Angiogenesis
Blood vessel formation starts early during embryonic development, around day 7. In the extraembryonic yolk sac, mesodermal precursor cells called hemangioblast proliferate and differentiate into angioblast. Angioblasts express vascular endothelial growth factor receptor 2 or VEGFR2, which binds VEGF-A, a proangiogenic factor, guiding blood vessel formation. VEGF signaling promotes angioblasts to form a blood island in the developing embryo. Angioblasts further differentiate, giving rise to...
Regulation of Angiogenesis and Blood Supply
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 hydroxylase and factor...
Nitric Oxide Signaling Pathway
Nitric oxide (NO), an inorganic gas, acts as a potent second messenger in most animal and plant tissues. NO diffuses out of the cells that produce it and enters the neighboring cells to generate a downstream response. NO synthase (NOS) catalyzes NO production by the deamination of the amino acid arginine. There are three isoforms of NOS. Endothelial cells have endothelial NOS (eNOS), nerve and muscle cells have neuronal NOS (nNOS), and macrophages produce inducible NOS (iNOS) upon exposure to...
Ischemic Heart Disease: Overview
Ischemic heart disease occurs when the heart's blood supply dwindles, causing an ominous lack of oxygen and nutrients. This deficiency, stemming from reduced or obstructed blood flow, spells danger, leading to heart muscle damage and dysfunction.
Atherosclerosis, the primary malefactor, orchestrates this dangerous condition. It manifests as the accumulation of fatty deposits, akin to insidious plaques, within arterial walls. As time elapses, these plaques metamorphose, hardening and narrowing...
Atherosclerosis, the primary malefactor, orchestrates this dangerous condition. It manifests as the accumulation of fatty deposits, akin to insidious plaques, within arterial walls. As time elapses, these plaques metamorphose, hardening and narrowing...
Coronary Artery Disease II: Pathophysiology
Coronary Artery Disease (CAD) originates from a series of events that impair the function of coronary arteries, the blood vessels responsible for delivering oxygen-rich blood to the heart muscle. The pathophysiology of CAD is closely linked to atherosclerosis, a chronic inflammatory and lipid-driven condition affecting the vascular endothelium.1. Endothelial DamageThe process begins with damage to the vascular endothelium, which serves as a protective barrier between the blood and the vessel...

