Evidence map›Paper›PMID 33423673›Full record

ArticleBMC nephrology2021

Endothelial glycocalyx damage in kidney disease correlates with uraemic toxins and endothelial dysfunction.

Hui Liew, Matthew A Roberts, Alun Pope, Lawrence P McMahon

Abstract read
In one paragraph

Article in BMC nephrology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 53 papers.

0numbers the graph read from it
0cells of the map it votes in
53citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

53 citing papers in PubMed.

  1. Trial
  2. Review
  3. Article
  4. Observational
  5. Review
  6. The endothelium response to kidney injury.Nature reviews. Nephrology · 2026
    Review
  7. Review
  8. Article
  9. Review
  10. Review
  11. Review
  12. Review
  13. Article
  14. Article
  15. Review
  16. Article
  17. Article
  18. Endothelial Glycocalyx Damage and Restoration Following Vascular Stent Implantation.Journal of cardiovascular translational research · 2025
    Review
  19. Endothelial dysfunction in chronic kidney disease: a clinical perspective.American journal of physiology. Heart and circulatory physiology · 2025
    Review
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

4 authors.

Hui LiewDepartment of Renal Medicine, Eastern Health, 3128, Box Hill, Victoria, Australia. hui.liew@easternhealth.org.au.ORCID 0000-0001-7463-9956
Matthew A RobertsDepartment of Renal Medicine, Eastern Health, 3128, Box Hill, Victoria, Australia.
Alun PopeEastern Health Clinical School, Monash University, 3128, Box Hill, Victoria, Australia.
Lawrence P McMahonDepartment of Renal Medicine, Eastern Health, 3128, Box Hill, Victoria, Australia.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundDamage to the endothelial glycocalyx is an early indicator of vascular damage and a potential marker of endothelial dysfunction. This study aimed to assess the relationship between markers of glycocalyx damage, endothelial dysfunction, and uraemic toxins in patients with chronic kidney disease.

methodsHealthy controls, CKD patients, dialysis patients, and kidney transplant recipients had biochemical markers of glycocalyx damage (syndecan-1 and hyaluronan), endothelial dysfunction (von Willebrand factor; vWF and vascular cell adhesion molecule; VCAM-1), and uraemic toxins (indoxyl sulphate and p-cresyl sulphate) measured. In addition, Sidestream Darkfield imaging was performed using the novel GlycoCheck™ device to measure glycocalyx width by the perfused boundary region (PBR) in the sublingual microcirculation.

resultsSerum markers of glycocalyx damage were highest in the dialysis group (n = 33), followed by CKD patients (n = 32) and kidney transplant recipients (n = 30) compared to controls (n = 30): hyaluronan: 137 (16-1414), 79 (11-257), 57 (14-218) and 23 (8-116) ng/mL, respectively, p < 0.0001; syndecan-1: 81 (40-529), 46 (21-134), 39 (23-72), and 30 (12-138) ng/mL, respectively, p < 0.0001. Markers of endothelial dysfunction followed a similar pattern. No difference in the width of the PBR was detected between these groups (2.01 ± 0.35, 2.07 ± 0.27, 2.06 ± 0.28, and 2.05 ± 0.3 µm, respectively, p = 0.89). Glycocalyx damage correlated with markers of endothelial dysfunction (log-hyaluronan and log-VCAM-1: r = 0.64, p < 0.001) and levels of uraemic toxins (log-hyaluronan and log-indoxyl sulphate: r = 0.48, p < 0.001).

conclusionsLevels of biochemical markers of glycocalyx and endothelial cell damage are highest in patients receiving dialysis. Glycocalyx and endothelial damage markers correlated with each other, and with uraemic toxins. Although we could not demonstrate a change in PBR, the biochemical markers suggest that glycocalyx damage is most marked in patients with higher levels of uraemic toxins.

Indexed as

GlycocalyxAdultAgedAged, 80 and overBiomarkersCorrelation of DataEndothelium, VascularFemaleHumansHyaluronic AcidMaleMiddle AgedProspective StudiesRenal Insufficiency, ChronicSyndecan-1Toxins, BiologicalBiomarkersHyaluronic AcidSDC1 protein, humanSyndecan-1Toxins, BiologicalCKDEndothelial dysfunctionGlycocalyxSidestream DarkfieldUraemia

Identifiers

PMID33423673
PMCPMC7798348

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LicenceCC BY
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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.