Endothelial Glycocalyx Dynamics in Vascular Health

The endothelial glycocalyx is a gel-like layer of membrane-bound proteoglycans, glycosaminoglycans and associated plasma proteins that lines the luminal surface of blood vessels. It serves as a dynamic nano-interface governing vascular permeability, mechanotransduction of shear stress and receptor-mediated cell interactions. Under physiological shear, the glycocalyx maintains capillary barrier integrity, regulates microcirculatory perfusion and prevents unwarranted leukocyte and platelet adhesion. In response to inflammatory cytokines, hypoxia or mechanical injury, selective shedding of core proteoglycans such as syndecan-1 and heparan sulphate fragments occurs, leading to increased permeability, microthrombosis and impaired vasoreactivity. Dysregulation of glycocalyx turnover is implicated in the pathogenesis of sepsis, acute trauma, diabetes and atherosclerosis, and serves as a prognostic indicator of organ dysfunction. Recent advances have uncovered self-organising principles of its sulphated polymer network, revealed its role as a complementary neural-like signalling compartment and pointed to novel therapeutic avenues including plasma-derived factors and fluid management strategies. A detailed understanding of the molecular assembly, biomechanical resilience and reparative pathways of the glycocalyx is essential for the development of biomimetic therapies and for optimising resuscitation in critical illness.

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Endothelial Glycocalyx Dynamics in Vascular Health publication trend

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

Technical terms

Endothelial glycocalyx: A carbohydrate-rich layer on the inner surface of blood vessels that regulates barrier function and cell interactions.

Proteoglycan: A core protein bearing covalently attached glycosaminoglycan chains, essential for glycocalyx structure and signalling.

Glycosaminoglycan: A long, unbranched polysaccharide chain that binds water and ions, contributing to the gel-like properties of the glycocalyx.

Mechanotransduction: The process by which endothelial cells convert mechanical forces such as shear stress into biochemical signals.

Microvascular permeability: The capacity of small blood vessels to allow fluids and solutes to pass through their walls.

References

1. The endothelial surface layer-glycocalyx - Universal nano-infrastructure is fundamental to physiology, cell traffic and a complementary neural network. Advances in Colloid and Interface Science (2025).
2. Plasma for prevention and treatment of glycocalyx degradation in trauma and sepsis. Critical Care (2024).
3. Intravenous fluid resuscitation is associated with septic endothelial glycocalyx degradation. Critical Care (2019).