Aortic Tissue Hypoxia
Aortic Tissue Hypoxia - Related Videos
08:37
Creation of a Rodent Model of Abdominal Aortic Aneurysm by Blocking Adventitial Vasa Vasorum Perfusion
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Cited by 12 •
2017
Polyurethane catheter insertion into the aortic lumen and suture ligation of the aorta induce chronic hypoxia due to hypoperfusion of the adventitial vasa vasorum. This article describes a novel animal model of abdominal aortic aneurysm (AAA) with characteristics similar to those of AAA in humans.
12:17
Full-root Aortic Valve Replacement by Stentless Aortic Xenografts in Patients with Small Aortic Roots
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Cited by 4 •
2017
Full-root aortic valve replacement by stentless aortic xenograft is a viable option in patients with small aortic roots. We describe, a technique for the full-root implantation of stentless aortic xenografts, with emphasis on the management of the proximal suture line and coronary anastomoses, and discuss its limitations and alternative options.
09:12
Aortic Ring Assay
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Cited by 42 •
2009
Angiogenesis, the sprouting of blood vessels from pre-existing vasculature, is associated with both natural and pathological processes. Here we demonstrate an aortic ring assay that allows angiogenic potentiators and inhibitors to be directly added to aortic rings in culture. Sprouting and neovessel outgrowth can be determined by inspecting the aortic rings over a period of 6-12 days.
07:01
Induction and Testing of Hypoxia in Cell Culture
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Cited by 247 •
2011
Here we propose simple methods to induce hypoxia in cell cultures and simple tests to evaluate the hypoxic status of the cultures.
08:01
Induction of Hypoxia in Living Frog and Zebrafish Embryos
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Cited by 5 •
2017
We introduce a novel hypoxic chamber system for use with aquatic organisms such as frog and zebrafish embryos. Our system is simple, robust, cost-effective and allows the induction and sustainment of hypoxia in vivo and for up to 48 h. We present 2 reproducible methods to monitor the effectiveness of hypoxia.
FAQs
Two oxygen sources support the aortic wall: diffusion from blood in the lumen and delivery through the vasa vasorum, its small supporting vessels. Their relative contribution becomes important when the wall thickens or blood flow is impaired, because oxygen must reach cells across a greater or less adequately supplied tissue distance. This helps explain why supply limitations can affect vascular structure and function.
The balance between oxygen supply and metabolic demand determines whether the aortic wall remains adequately supported. Reduced blood flow or increased wall thickness can restrict delivery, while greater cellular demand can further widen the mismatch. Researchers therefore consider both sides of this balance rather than treating low oxygen as an isolated vascular variable. The result may be altered wall behavior and remodeling.
Low oxygen can trigger cellular stress and inflammatory signaling in the aortic wall, while also influencing smooth muscle cell behavior. These responses can alter how the wall maintains itself and can promote remodeling of the extracellular matrix, the structural material surrounding cells. Consequently, hypoxia has effects beyond oxygen availability: it can change cellular activity and the architecture of vascular tissue.
Studying oxygen balance links a local oxygen imbalance to measurable vascular consequences, including changes in structure and function. Investigators can use this framework to ask whether impaired delivery, excessive demand, or both accompany a particular wall abnormality. That interpretation is useful because it connects a physiological condition with downstream remodeling rather than viewing the aortic wall as static.
In atherosclerosis research, hypoxia provides a possible mechanism connecting limited oxygen availability with inflammatory signaling, smooth muscle cell changes, and extracellular-matrix remodeling. These processes can modify the vascular wall and help explain how its environment changes during disease. The concept is therefore relevant not only to oxygen transport, but also to the biological progression of atherosclerosis.
Aneurysm studies can use the same framework to examine whether inadequate oxygen delivery accompanies changes in the aortic wall and extracellular matrix. The value is not that hypoxia alone proves causation, but that it identifies a condition potentially associated with structural remodeling. Such work may support diagnostic strategies and the development of treatments directed at relevant pathways.