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Updated: Oct 5, 2025
Analyzing the Permeability of the Blood-Brain Barrier by Microbial Traversal through Microvascular Endothelial Cells
Published on: February 14, 2020
Cerebral microvascular endothelial glycocalyx damage, its implications on the blood-brain barrier and a possible
Patrice Stoddart1, Simon C Satchell2, Raina Ramnath3
1University of Bristol, Dorothy Hodgkin Building, Whitson Street, Bristol BS1 3NY, United Kingdom.
Insights
The cerebral endothelial glycocalyx (CeGC) is crucial for blood-brain barrier function and may offer new treatments for cognitive impairment. Damage to the CeGC is linked to conditions like Alzheimer's and Covid-19.
Area of Science:
- Neuroscience
- Cell Biology
- Biochemistry
Background:
- Cognitive impairment diseases pose a growing socio-economic burden.
- The cerebral endothelial glycocalyx (CeGC) plays a vital role in blood-brain barrier (BBB) integrity.
- CeGC degradation is implicated in various neurological conditions.
Purpose of the Study:
- To review current knowledge on the CeGC's structure, function, and role in cognitive impairment.
- To evaluate the CeGC as a potential diagnostic marker and therapeutic target.
- To consolidate evidence on CeGC damage and repair mechanisms.
Main Methods:
- Literature review of existing research on the CeGC.
- Analysis of studies linking CeGC degradation to cognitive impairment.
- Evaluation of experimental models investigating CeGC function and damage.
Main Results:
- The CeGC is a specialized structure within cerebral microvessels, essential for BBB function.
- Premature CeGC degradation is observed in conditions associated with cognitive decline, including Alzheimer's and Covid-19.
- CeGC damage mechanisms are increasingly understood, suggesting its potential as a diagnostic and therapeutic target.
Conclusions:
- The CeGC is a promising target for therapeutic interventions against cognitive impairment.
- Further research is needed to validate CeGC's role and develop effective treatments.
- Understanding CeGC mechanisms is key to addressing the impact of cognitive decline.
Abstract:
The socio-economic impact of diseases associated with cognitive impairment is increasing. According to the Alzheimer's Society there are over 850,000 people with dementia in the UK, costing the UK £26 billion in 2013. Therefore, research into treatment of those conditions is vital. Research into the cerebral endothelial glycocalyx (CeGC) could offer effective treatments. The CeGC, consisting of proteoglycans, glycoproteins and glycolipids, is a dynamic structure covering the luminal side oftheendothelial cells of capillaries throughout the body. The CeGC is thicker in cerebral micro vessels, suggesting specialisation for its function as part of the blood-brain barrier (BBB). Recent research evidences that the CeGC is vital in protecting fragile parenchymal tissue and effective functioning of the BBB, as one particularly important CeGC function is to act as a protective barrier and permeability regulator. CeGC degradation is one of the factors which can lead to an increase in BBB permeability. It occurs naturally in aging, nevertheless, premature degradationhas beenevidencedin multipleconditions linked to cognitive impairment, such as inflammation,brain edema, cerebral malaria, Alzheimer's and recently Covid-19. Increasing knowledge of the mechanisms of CeGC damage has led to research into preventative techniques showing that CeGC is a possible diagnostic marker and a therapeutic target. However, the evidence is relatively new, inconsistent and demonstrated mainly in experimental models. This review evaluates the current knowledge of the CeGC, its structure, functions, damage and repair mechanisms and the impact of its degeneration on cognitive impairment in multiple conditions, highlighting the CeGC as a possible diagnostic marker and a potential target for therapeutic treatment.
