Cited by 75Polymer Surface Interaction StudiesNitric Oxide and Endothelin EffectsHydrogels: synthesis, properties, applications

Improved haemocompatibility of cysteine-modified polymers via endogenous nitric oxide

Duan, Xunbao, Lewis, Randy S.·2002·Biomaterials

Abstract

A novel method for improving the haemocompatibility of biomedical materials through endogenous nitric oxide (NO) is presented. L-cysteine was covalently immobilized onto two biomedical polymers: polyurethane (PU) and polyethylene terephthalate (PET). The L-cysteine content on the polymers was approximately 5-8 nmol/cm2 as quantified via a chemiluminescence-based assay. The haemocompatibility of the modified polymers was evaluated in terms of the number of adhered platelets when exposed to a platelet suspension labeled with Cr51. Platelet adherence on the L-cysteine-modified polymers was reduced more than 50% as compared to the control (glycine-modified polymers) when the platelet suspension contained plasma constituents. No difference in platelet adhesion was observed in the absence of plasma constituents. Further experiments demonstrated that NO was easily transferred to the L-cysteine-modified polymers from S-nitroso-albumin in PBS buffer. The NO was then released from the polymer. NO transfer or release was not observed for the control. The results suggest that L-cysteine-modified polymers are effective in reducing platelet adhesion via the transfer of NO from endogenous S-nitrosoproteins in plasma to the polymer followed by the subsequent release of NO. Thus, exploiting endogenous NO is a viable option for improving the haemocompatibility of biomaterials.

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Crossref · 10.1016/s0142-9612(01)00234-4

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Authors
Duan, X., & Lewis, R. S.
Affiliations
Oklahoma State University (US)
Corresponding author
Lewis, Randy S.
Venue
Biomaterials
Publisher
Elsevier BV
Published
2002-02
Volume
23
Issue
4
Pages
1197-1203
ISSN
0142-9612 (ISSN-L)
OpenAlex
W1990268295
Cited by
75
References
31
Citations by year
2024: 1 · 2023: 1 · 2022: 1 · 2021: 1 · 2020: 2 · 2019: 4 · 2018: 2 · 2017: 3 · 2016: 7 · 2015: 2 · 2014: 2 · 2013: 5 · 2012: 8
FWCI
2.55
Type
journal article
Language
en
Open access
closed
Locations
  • Biomaterials (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Physical Sciences › Materials Science › Surfaces, Coatings and Films › Polymer Surface Interaction Studies
  • Health Sciences › Medicine › Physiology › Nitric Oxide and Endothelin Effects
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Medicine › Hydrogels: synthesis, properties, applications
Keywords
hemocompatibility, nitric oxide, cysteine, covalent immobilization, polyurethane, polyethylene terephthalate, platelet adhesion, nitric oxide release
MeSH terms
Animals, Biocompatible Materials, Blood, Cattle, Cysteine, Humans, Materials Testing, Nitric Oxide, Platelet Adhesiveness, Polyethylene Terephthalates, Polymers, Polyurethanes, Serum Albumin, Bovine, In Vitro Techniques

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