Endothelium Dependent Vasodilation
Endothelium Dependent Vasodilation - Related Videos
08:09
Vasodilation of Isolated Vessels and the Isolation of the Extracellular Matrix of Tight-skin Mice
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Cited by 1 •
2017
We describe the isolation of cardiac extracellular matrix from C57Bl/6J control mice, tight-skin mice, and tight-skin mice treated with the IRF5 inhibitory peptide. We also describe the vasodilation studies on the isolated vessels from C57Bl/6J, tight-skin mice and tight-skin mice treated with the IRF5 inhibitory peptide.
07:46
Assessing Endothelial Vasodilator Function with the Endo-PAT 2000
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Cited by 165 •
2010
A noninvasive procedure to assess endothelial function is demonstrated using the Endo-PAT 2000.
08:42
Ultrasound Assessment of Endothelial-Dependent Flow-Mediated Vasodilation of the Brachial Artery in Clinical Research
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Cited by 42 •
2014
Endothelial dysfunction is associated with numerous disease states and is predictive of adverse cardiovascular events in humans. Flow-mediated vasodilation (FMD) is a non-invasive ultrasound method of evaluating endothelial function. Methodological choices and operator experience may affect results. A systematic approach to FMD in human studies is discussed here.
01:23
Antihypertensive Drugs: Vasodilators
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2024
Vasodilators, primarily affecting the smooth muscles within arterial and venous walls, are commonly used for hypertension treatment. Medications such as minoxidil and hydralazine primarily target arteries and arterioles, while sodium nitroprusside acts on arterioles and venules. Minoxidil, functioning as a prodrug, is metabolized by hepatic sulfotransferase into its active form, minoxidil sulfate, after oral administration. This metabolite binds to the sulfonylurea receptor (SUR) component of...
09:47
Measurement of Endothelium-Dependent Vasorelaxation in the Mouse Thoracic Aorta Using Tensometric Small Volume Chamber Myography
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Cited by 1 •
2022
The present protocol describes the concepts and technical application of the tensometric myograph technique using a multi-chamber myograph system in the experimental ex vivo assessment of mouse aortic endothelial function.
FAQs
The decisive signaling step follows nitric oxide production by endothelial nitric oxide synthase. Nitric oxide enters adjacent smooth muscle cells and activates guanylyl cyclase, which raises cyclic GMP. This messenger promotes smooth muscle relaxation, linking endothelial activity to changes in vessel diameter. The pathway explains how a signal originating at the vascular lining can alter blood-flow regulation.
Increased shear stress and specific agonists represent distinct stimuli that can activate endothelial signaling. Both may promote nitric oxide synthase activity, but they arise from different vascular conditions: shear stress reflects the physical force associated with flowing blood, whereas agonists provide a targeted chemical signal. Comparing these triggers helps investigators examine how endothelial cells sense and respond to their environment.
Changes in vessel diameter directly influence how readily blood can move through the circulation. By relaxing neighboring smooth muscle, endothelial signaling can reduce vascular resistance and help match blood flow to physiological demands. This relationship makes the response important for cardiovascular homeostasis and provides a functional link between endothelial health, vessel behavior, and overall regulation of circulation.
A study can examine vascular responses after applying an endothelial stimulus such as increased shear stress or a specific agonist. Investigators can then relate the resulting change in vessel relaxation to endothelial nitric oxide synthase activity and downstream cyclic GMP signaling. This approach connects an experimental trigger with functional outcomes in vascular physiology and endothelial function.
The magnitude or effectiveness of the vasodilatory response can serve as an indication of how well endothelial signaling regulates nearby vascular smooth muscle. Studying the response allows researchers to connect endothelial stimuli with nitric oxide production, cyclic GMP activation, and altered vessel behavior. It therefore provides a functional framework for investigating vascular physiology rather than examining endothelial cells only as a structural lining.
Impaired endothelial signaling can disrupt the normal regulation of blood-flow and vascular resistance, making it relevant to studies of atherosclerosis and hypertension. Examining this impairment helps researchers investigate how altered endothelial function may contribute to disordered vascular control. The response therefore serves as a biological context for connecting cellular signaling mechanisms with cardiovascular disease processes.