Cited by 44Cardiac and Coronary Surgery TechniquesAngiogenesis and VEGF in CancerNitric Oxide and Endothelin Effects

Angiopoietin-2 is a potential mediator of endothelial barrier dysfunction following cardiopulmonary bypass

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Clajus, Christian, Lukasz, Alexander, David, Sascha, Hertel, Barbara, Lichtinghagen, Ralf, Parikh, Samir M., Simon, André, Ismail, Issam +2 more·2012·Cytokine

Abstract

Introduction Endothelial activation leading to vascular barrier dysfunction and organ failure is a well-recognized complication of cardiovascular surgery with cardiopulmonary bypass (CPB). The endothelial-specific angiopoietin-Tie2 ligand-receptor system has been identified as a non-redundant regulator of endothelial activation. Binding of angiopoietin-2 (Ang-2) to the Tie2 receptor antagonizes Tie2 signaling and renders the endothelial barrier responsive to pro-inflammatory cytokines. We aimed to study the time course and potential triggering factors of Ang-2 release after CPB, as well as the association of Ang-2 changes with surrogates of increased vascular permeability, organ dysfunction, and outcome.Methods Serum levels of Ang-2 from 25 adult patients (140 screened) were measured before and at 0, 12, and 24h following CPB procedure by in-house immuno-luminometric assay (ILMA), and compared with indices of organ dysfunction, duration of mechanical ventilation (MV), length of stay (LOS) in the intensive care unit (ICU), and hospital mortality. The effect of Ang-2 was studied in vitro by incubating high Ang-2 patient serum with endothelial cells (EC).Results Ang-2 levels steadily increased from 2.6 ± 2.4 ng/mL at 0 h up to 7.3 ± 4.6 ng/mL at 24h following CPB (P<0.001). The release of Ang-2 correlated with the duration of CPB, aortic cross-clamp time, and post-CPB lactate levels. Changes in Ang-2 during follow-up correlated with partial pressure of oxygen in arterial blood (PaO(2))/fraction of inspired oxygen (FiO(2)) ratio, alveolar-arterial oxygen tension difference (AaDO(2)), hemodynamics, fluid balance, and disease severity measures. Ang-2 levels at 12h predicted the duration of MV, ICU-LOS, and hospital mortality. High Ang-2 patient sera disrupted EC architecture in vitro, an effect reversed by treatment with the competitive Tie2 ligand angiopoietin-1 (Ang-1).Conclusions Collectively, our results suggest that Ang-2 is a putative mediator of endothelial barrier dysfunction after CPB. These findings suggest that targeting the Ang/Tie2 pathway may mitigate organ dysfunction and improve outcome in patients undergoing CPB.

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Crossref · 10.1016/j.cyto.2012.04.002

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  1. [35]Mammoto T Parikh SM Mammoto A Gallagher D Chan B Mostoslavsky G Angiopoietin-1 requires p190 RhoGAP to protect against vascular leakage in vivo J Biol Chem 2007 282 23910 23918 17562701

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Authors
Clajus, C., Lukasz, A., David, S., Hertel, B., Lichtinghagen, R., Parikh, S. M., Simon, A., Ismail, I., Haller, H., & Kümpers, P.
Affiliations
  • Medizinische Hochschule Hannover (DE)
  • Beth Israel Deaconess Medical Center (US)
  • University Hospital Münster (DE)
Corresponding author
Kümpers, Philipp
Venue
Cytokine
Publisher
Elsevier BV
Published
2012-11
Volume
60
Issue
2
Pages
352-359
ISSN
1043-4666 (ISSN-L)
OpenAlex
W2058504973
Cited by
44
References
43
Citations by year
2026: 1 · 2025: 2 · 2024: 1 · 2023: 14 · 2021: 4 · 2020: 3 · 2019: 2 · 2018: 6 · 2017: 1 · 2016: 3 · 2015: 2 · 2014: 5
FWCI
2.29
Type
journal article
Language
en
Open access
Locations
  • Cytokine (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Heart, Lung, and Blood Institute (R01HL093234)
Topics
  • Health Sciences › Medicine › Surgery › Cardiac and Coronary Surgery Techniques
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Angiogenesis and VEGF in Cancer
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
Keywords
angiopoietin-2, cardiopulmonary bypass, endothelial barrier dysfunction, Tie2 receptor, angiopoietin-1, vascular permeability, organ dysfunction, postoperative mortality, mechanical ventilation duration, endothelial activation, cardiac surgery complications
MeSH terms
Adult, Aged, Hypoxia, Capillaries, Cardiopulmonary Bypass, Endothelium, Female, Fluorescent Antibody Technique, Humans, Male, Respiration, Artificial, Treatment Outcome, Microscopy, Confocal, Angiopoietin-2, Endothelial Cells, Kaplan-Meier Estimate

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