Endothelial Cell Biology in Vascular Health

The vascular endothelium is a dynamic monolayer of specialised cells lining the inner surface of blood and lymphatic vessels. Far from serving as a passive barrier, endothelial cells actively regulate vascular tone through the synthesis of vasodilators and vasoconstrictors, maintain haemostatic balance by orchestrating coagulation and fibrinolysis, and control the selective exchange of fluid, solutes and macromolecules. They guide immune cell trafficking and mount local inflammatory responses, while also directing angiogenesis during tissue repair. Endothelial heterogeneity—manifest as organ-specific gene expression, structural adaptations such as fenestrations or continuous junctions, and distinct receptor profiles—underpins the specialised functions of vessels in different tissues. Vascular health relies on the integrity of endothelial mechanotransduction pathways, intercellular junctions and the glycocalyx, with dysfunction leading to hypertension, atherosclerosis, thrombosis and chronic inflammatory disorders. Understanding these fundamental processes has global significance for the prevention and treatment of cardiovascular and inflammatory diseases.

Research from Nature Portfolio

Recent studies have revealed organ-specific inflammatory responses in endothelial cells. Investigations across vascular beds from heart, lung, kidney and liver have demonstrated distinct patterns of adhesion molecule upregulation and chemokine secretion that shape tissue-specific immune cell recruitment. Differences in baseline immune-regulating gene expression appear to underpin variable vascular inflammation and rejection risk in organ transplantation. Furthermore, analysis of human male and female endothelial cells has uncovered intrinsic sexual dimorphism in endothelial Nitric Oxide Synthase expression and activity. Female cells exhibit higher eNOS levels and nitric oxide production, which in turn modulate migratory and sprouting behaviours during angiogenesis. Male cells rely more on proliferation for capillary outgrowth, suggesting that sex-specific signalling should inform therapeutic strategies for cardiovascular disease.

Endothelial Cell Biology in Vascular Health publication trend

The graph below shows the total number of articles in endothelial cell biology in vascular health across all publications each year (not limited to Nature Index journals).

Technical terms

Endothelial cell: A specialised cell forming the innermost lining of blood and lymphatic vessels, crucial for barrier function and vascular regulation.

Glycocalyx: A carbohydrate-rich layer covering the endothelial surface that modulates vascular permeability and mechanotransduction.

Nitric Oxide Synthase (eNOS): An enzyme in endothelial cells that produces nitric oxide, a key mediator of vasodilation and vascular homeostasis.

Angiogenesis: The formation of new blood vessels from existing vasculature, essential for tissue repair and growth.

Coagulation: The process of blood clot formation, regulated by a balance of procoagulant and anticoagulant factors on the endothelial surface.

References

1. Targeting immune cell trafficking and vascular endothelial cells in psoriasis. Journal of Clinical Investigation (2023).
2. Vascular Endothelial Cell Biology: An Update. International Journal of Molecular Sciences (2019).
3. Endothelial heterogeneity across distinct vascular beds during homeostasis and inflammation. eLife (2020).
4. Endothelial cells and coagulation. Cell and Tissue Research (2021).
5. Sex-specific eNOS activity and function in human endothelial cells. Scientific Reports (2017).
6. Vascular Endothelial Cells: Heterogeneity and Targeting Approaches. Cells (2021).
7. Tissue-specific endothelial cell heterogeneity contributes to unequal inflammatory responses. Scientific Reports (2021).