Cited by 119Polymer Surface Interaction StudiesNitric Oxide and Endothelin EffectsMechanical Circulatory Support Devices

The hemocompatibility of a nitric oxide generating polymer that catalyzes S-nitrosothiol decomposition in an extracorporeal circulation model

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Major, Terry C., Brant, David O., Burney, Charles P., Amoako, Kagya A., Annich, Gail M., Meyerhoff, Mark E., Handa, Hitesh, Bartlett, Robert H.·2011·Biomaterials

Abstract

Nitric oxide (NO) generating (NOGen) materials have been shown previously to create localized increases in NO concentration by the catalytic decomposition of blood S-nitrosothiols (RSNO) via copper (Cu)-containing polymer coatings and may improve extracorporeal circulation (ECC) hemocompatibility. In this work, a NOGen polymeric coating composed of a Cu⁰-nanoparticle (80 nm)-containing hydrophilic polyurethane (SP-60D-60) combined with the intravenous infusion of an RSNO, S- nitroso-N-acetylpenicillamine (SNAP), is evaluated in a 4 h rabbit thrombogenicity model and the anti-thrombotic mechanism is investigated. Polymer films containing 10 wt.% Cu⁰-nanoparticles coated on the inner walls of ECC circuits are employed concomitantly with systemic SNAP administration (0.1182 μmol/kg/min) to yield significantly reduced ECC thrombus formation compared to polymer control + systemic SNAP or 10 wt.% Cu NOGen + systemic saline after 4 h blood exposure (0.4 ± 0.2 NOGen/SNAP vs 4.9 ± 0.5 control/SNAP or 3.2 ± 0.2 pixels/cm² NOGen/saline). Platelet count (3.9 ± 0.7 NOGen/SNAP vs 1.8 ± 0.1 control/SNAP or 3.0 ± 0.2 × 10⁸/ml NOGen/saline) and plasma fibrinogen levels were preserved after 4 h blood exposure with the NOGen/SNAP combination vs either the control/SNAP or the NOGen/saline groups. Platelet function as measured by aggregometry (51 ± 9 NOGen/SNAP vs 49 ± 3% NOGen/saline) significantly decreased in both the NOGen/SNAP and NOGen/saline groups while platelet P-selectin mean fluorescence intensity (MFI) as measured by flow cytometry was not decreased after 4 h on ECC to ex vivo collagen stimulation (26 ± 2 NOGen/SNAP vs 29 ± 1 MFI baseline). Western blotting showed that fibrinogen activation as assessed by Aγ dimer expression was reduced after 4 h on ECC with NOGen/SNAP (68 ± 7 vs 83 ± 3% control/SNAP). These results suggest that the NOGen polymer coating combined with SNAP infusion preserves platelets in blood exposure to ECCs by attenuating activated fibrinogen and preventing platelet aggregation. These NO-mediated platelet changes were shown to improve thromboresistance of the NOGen polymer-coated ECCs when adequate levels of RSNOs are present.

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Crossref · 10.1016/j.biomaterials.2011.03.036

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  • A Cu0 NP embedded ECC circuit with SNAP infusion yielded considerably less thrombus (0.4 ± 0.2 pixel/cm2) after 4 h compared with a Cu0 NP circuit without SNAP infusion (3.2 ± 0.2 pixel/cm2) or a control circuit without Cu0 NP (4.9 ± 0.5 pixel/cm2).

    “The Cu0 NP embedded ECC circuit with SNAP infusion yields considerably less thrombus (0.4 ± 0.2 pixel/cm2) on the surface of the chamber after 4 h, as compared to the Cu0 NP circuit without SNAP infusion (3.2 ± 0.2 pixel/cm2) or the control circuit without Cu0 NP (4.9 ± 0.5 pixel/cm2).”
  • Because endogenous RSNO levels are low (1-10 μmol/L for SNO-albumin), this approach requires a consistent supply of infused RSNOs to provide continuous catalytic NO generation at the flowing blood/polymer tubing interface.

    “Of note, since the endogenous RSNO levels are low (e.g., 1–10 µmol/L for SNO-albumin),280 this approach requires consistent supply of infused RSNOs to provide continuous catalytic generation of NO at the flowing blood/polymer tubing interface.254”

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Authors
Major, T. C., Brant, D. O., Burney, C. P., Amoako, K. A., Annich, G. M., Meyerhoff, M. E., Handa, H., & Bartlett, R. H.
Affiliations
University of Michigan (US)
Corresponding author
Major, Terry C.
Venue
Biomaterials
Publisher
Elsevier BV
Published
2011-09
Volume
32
Issue
26
Pages
5957-5969
ISSN
0142-9612 (ISSN-L)
OpenAlex
W1977237239
Cited by
118
References
47
Citations by year
2026: 6 · 2025: 5 · 2024: 6 · 2023: 9 · 2022: 14 · 2021: 5 · 2020: 6 · 2019: 11 · 2018: 8 · 2017: 10 · 2016: 7 · 2015: 10 · 2014: 8 · 2013: 9 · 2012: 2
FWCI
3.10
Type
journal article
Language
en
Open access
Locations
  • Biomaterials (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • Digital Commons - New Heaven (University of New Haven) (submittedVersion, cc-by-nc-nd)
Funders
National Institutes of Health (R01 HD 01534, EB-004527)
Topics
  • Physical Sciences › Materials Science › Surfaces, Coatings and Films › Polymer Surface Interaction Studies
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Physical Sciences › Engineering › Biomedical Engineering › Mechanical Circulatory Support Devices
Keywords
copper nanoparticles, polyurethane coatings, extracorporeal circulation, hemocompatibility, thrombogenicity, S-nitroso-N-acetylpenicillamine, platelet aggregation, fibrinogen activation, P-selectin
MeSH terms
Animals, Extracorporeal Circulation, Fibrinogen, Flow Cytometry, Fluorescent Antibody Technique, Humans, Nitric Oxide, Polymers, Rabbits, Blotting, Western, S-Nitrosothiols

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