Vascular endothelial function

Vascular endothelial function refers to the complex physiological activity of the endothelium, the monolayer of cells lining the entire vascular system. It acts as a dynamic organ that maintains vascular homeostasis by regulating vascular tone, blood flow, leukocyte adhesion, and platelet aggregation through the secretion of various paracrine factors, most notably nitric oxide (NO) [1][2]. Endothelial dysfunction is characterized by a shift toward a pro-inflammatory, pro-thrombotic, and vasoconstrictive state, which serves as a critical early marker and driver of atherosclerosis and other cardiovascular diseases [2][3]. While not a single molecular target, improving endothelial function is a primary goal of many cardiovascular therapies, including statins, ACE inhibitors, and phosphodiesterase inhibitors, which work by enhancing NO signaling or reducing oxidative damage [3][4]. Clinical assessment of this function, often via flow-mediated dilation, provides valuable insights into a patient's cardiovascular risk and response to treatment [1][5]. Maintaining robust endothelial function is essential for preventing end-organ damage in conditions like hypertension and diabetes [1][3]. Sources: [1] StatPearls: Physiology, Endothelium (https://www.ncbi.nlm.nih.gov/books/NBK537233/); [2] Circulation: Endothelial Function and Cardiovascular Disease (https://www.ahajournals.org/doi/10.1161/01.CIR.0000128203.31223.4E); [3] Nature Reviews Cardiology: Endothelial dysfunction in cardiovascular disease (https://www.nature.com/articles/s41569-020-0407-5); [4] Journal of the American College of Cardiology: Endothelial Function as a Functional Expression of Cardiovascular Risk (https://www.jacc.org/doi/10.1016/j.jacc.2011.10.879); [5] PubMed: Assessment of endothelial function (https://pubmed.ncbi.nlm.nih.gov/15136432/).

Other names

Endothelial functionVasomotor functionEndothelial-dependent vasodilationVascular homeostasis

Drugs improve vascular endothelial function by increasing the bioavailability of nitric oxide (NO), reducing oxidative stress, or inhibiting vasoconstrictor pathways such as the renin-angiotensin-aldosterone system (RAAS) and endothelin-1 signaling [3][4].