Endothelium-Derived Modulation in Vascular Reactivity
Summary
The vascular endothelium functions as a dynamic regulator of blood vessel tone by releasing a diverse array of chemical mediators that act on adjacent smooth muscle and circulating elements. Classical endothelium-derived factors such as nitric oxide, prostacyclin and endothelium-derived hyperpolarising factor modulate vasodilatation and vasoconstriction in response to shear stress, hormonal signals and metabolic cues. In recent years, attention has turned to endothelial synthesis of catecholamines, notably dopamine and nitro-modified derivatives such as 6-nitrodopamine, which exert potent local effects on vascular reactivity and cardiac inotropy. These mediators interact with specific G-protein-coupled receptors on smooth muscle cells, modulate oxidative balance via reactive oxygen species, and integrate with neurogenic control mechanisms. Collectively, endothelium-derived modulation underpins fundamental processes in blood pressure regulation, tissue perfusion and vascular remodelling. Dysregulation of this system contributes to hypertension, atherosclerosis and end-organ injury, while targeted manipulation of endothelial signalling pathways holds promise for novel therapeutic approaches to cardiovascular disease.
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Endothelium-Derived Modulation in Vascular Reactivity publication trend
The graph below shows the total number of articles in endothelium-derived modulation in vascular reactivity across all publications each year (not limited to Nature Index journals).
Technical terms
Endothelium: Monolayer of cells lining the interior of blood vessels that senses mechanical and chemical stimuli to regulate vascular tone and homeostasis.
Nitric oxide synthase (eNOS): Enzyme responsible for production of nitric oxide in endothelial cells, a central mediator of vasodilatation.
Catecholamines: Biogenic amines (e.g. dopamine, noradrenaline) that act as neurotransmitters and local autocrine/paracrine modulators of vascular and cardiac function.
6-Nitrodopamine: Nitro-modified derivative of dopamine produced by endothelial nitration pathways, with potent vasodilatory and inotropic properties.
Electric-field stimulation (EFS): Experimental technique applying electrical pulses to isolated vessels to evoke mediator-dependent contraction or relaxation without neural inputs.
Inotropy: Influence on the strength or force of cardiac muscle contraction.
References
- Endothelium-Derived Dopamine and 6-Nitrodopamine in the Cardiovascular System. Physiology (2023).
- Endothelium‐derived dopamine modulates EFS‐induced contractions of human umbilical vessels. Pharmacology Research & Perspectives (2020).
- Relaxation of thoracic aorta and pulmonary artery rings of marmosets (Callithrix spp.) by endothelium-derived 6-nitrodopamine. Brazilian Journal of Medical and Biological Research (2023).
- 6-Nitrodopamine Is the Most Potent Endogenous Positive Inotropic Agent in the Isolated Rat Heart. Life (2023).
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