Endothelial cell

Endothelial cells form a single-cell-thick layer lining all blood vessels and lymphatic vessels throughout the body. This layer acts as an interface between circulating fluids and vessel walls. The primary roles include regulating vascular tone through release of vasoactive substances like nitric oxide; maintaining selective permeability for fluid exchange; controlling hemostasis by balancing pro-coagulant and anti-coagulant factors; mediating inflammation through recruitment/signaling with immune cells; supporting angiogenesis during growth or repair; and participating in hormone trafficking. Dysfunctional endothelium contributes significantly to cardiovascular diseases such as hypertension and atherosclerosis as well as cancer metastasis due to loss of barrier integrity or abnormal vessel formation. While many drugs aim to restore healthy endothelial activity ("improve endothelial function"), there is no single molecular entity called "endothelial function"—it represents an integrated property arising from multiple cellular pathways within these specialized epithelial-like cells.[1][4][7] “The main job of endothelial cells is to provide a barrier between the blood and the rest of the body tissues... Other functions... include producing nitrous oxide [sic], blood clotting, blood vessel formation [angiogenesis], inflammation signaling... Damage... can result in vascular diseases such as high blood pressure, diabetes...” [7] In summary: “Endothelial function” should be mapped instead either generally under “Endothelial cell” if referring broadly—or more specifically under individual molecules/receptors expressed by these cells if known from context. If you need structured data for specific receptors/proteins involved in regulating “endothelial function” (e.g., Nitric oxide synthase type III/eNOS), please specify further.

Other names

Vascular endotheliumLymphatic endotheliumEndothelium

Drugs that improve endothelial function may: * Increase nitric oxide bioavailability for vasodilation * Reduce oxidative stress/inflammation in endothelium * Stabilize plaque/endothelial barrier integrity * Modulate expression/release of vasoactive substances such as endothelin, prostacyclin, etc.[3] These mechanisms are indirect effects on the overall functional state rather than direct binding to an individual molecular target.