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Related Concept Videos

Antiplatelet Drugs: Prostaglandin Synthesis, P2Y12 and Glycoprotein IIb/IIIa Inhibitors01:20

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Antiplatelet drugs emerge as frontline defenders against the insidious threat of thromboembolic diseases, where abnormal clots obstruct vital blood vessels. These drugs stand as bulwarks, inhibiting platelet aggregation and clot formation, thereby mitigating the risk of life-threatening conditions like myocardial infarction, coronary artery disease, and thrombotic strokes.
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Nitric Oxide Signaling Pathway01:28

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Nitric oxide (NO), an inorganic gas, acts as a potent second messenger in most animal and plant tissues. NO diffuses out of the cells that produce it and enters the neighboring cells to generate a downstream response. NO synthase (NOS) catalyzes NO production by the deamination of the amino acid arginine. There are three isoforms of NOS. Endothelial cells have endothelial NOS (eNOS), nerve and muscle cells have neuronal NOS (nNOS), and macrophages produce inducible NOS (iNOS) upon exposure...
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Nitric Oxide-Generating Antiplatelet Polyurethane Surfaces with Multiple Additional Biofunctions via

Sheng Jin1, Jialei Huang1, Xianshuang Chen1

  • 1State and Local Joint Engineering Laboratory for Novel Functional Polymeric Materials, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, 199 Ren-Ai Road, Suzhou 215123, People's Republic of China.

ACS Applied Bio Materials
|January 12, 2022
PubMed
Summary

Researchers developed a nitric oxide (NO)-generating coating for polyurethane (PU) surfaces. This biomaterial inhibits platelet and smooth muscle cell adhesion, offering a versatile platform for advanced medical devices.

Keywords:
fibrinolytic activityhemocompatibilitynitric oxide generationpolyurethane surfacessurface modificationvascular cell interactions

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Area of Science:

  • Biomaterials Science
  • Polymer Chemistry
  • Surface Modification

Background:

  • Developing advanced biomaterials with tailored biological functions is crucial for medical applications.
  • Nitric oxide (NO) generation is a key strategy for improving biocompatibility and preventing thrombosis.
  • Host-guest interactions offer a versatile method for functionalizing surfaces.

Purpose of the Study:

  • To create a nitric oxide-generating polymeric coating on polyurethane (PU) substrates.
  • To functionalize the coating with additional biological activities using host-guest chemistry.
  • To evaluate the antiplatelet and cellular effects of the modified surfaces.

Main Methods:

  • Copolymerization of 2-hydroxyethyl methacrylate (HEMA) and 1-adamantan-1-ylmethyl methacrylate (AdaMA) with selenocystamine.
  • Application of the polymer coating onto a PU substrate.
  • Incorporation of functional cyclodextrin (CD) complexes (CD-L for fibrinolysis, CD-S for endothelial cell proliferation) via adamantane-cyclodextrin interactions.

Main Results:

  • The PU-PHA-Se surface successfully generated nitric oxide (NO) in the presence of a NO donor.
  • The NO-generating surface inhibited platelet adhesion and smooth muscle cell adhesion/proliferation.
  • Functionalization with CD-L conferred fibrinolytic activity, while CD-S promoted endothelial cell proliferation.

Conclusions:

  • A multifunctional NO-generating polymeric coating was successfully developed.
  • Host-guest interactions provide an effective platform for incorporating diverse biological functions.
  • This approach offers a promising strategy for creating advanced, multifunctional biomaterials.