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Inflammation01:38

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Collagen-binding nanoparticles for extracellular anti-inflammatory peptide delivery decrease platelet activation,

James McMasters1, Alyssa Panitch1

  • 1Weldon School of Biomedical Engineering, Purdue University, 206 South Martin Jischke Drive, West Lafayette, IN 47906, United States.

Acta Biomaterialia
|November 15, 2016
PubMed
Summary
This summary is machine-generated.

New collagen-binding nanoparticles reduce inflammation and platelet adhesion after angioplasty. These nanoparticles promote endothelial regeneration, potentially preventing restenosis in peripheral artery disease patients.

Keywords:
Anti-inflammatory peptidesCollagenN-isopropylacrylamidePlateletThermosensitive polymer

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Area of Science:

  • Biomaterials Science
  • Nanotechnology
  • Cardiovascular Research

Background:

  • Peripheral artery disease (PAD) involves atherosclerotic stenosis treated with balloon angioplasty.
  • Angioplasty damages the endothelium, exposing collagen and triggering platelet activation, inflammation, and restenosis.
  • Current treatments lack strategies to mitigate post-angioplasty endothelial damage and inflammation.

Purpose of the Study:

  • To develop and characterize novel collagen-binding nanoparticles for targeted delivery post-angioplasty.
  • To evaluate the nanoparticles' ability to reduce cellular and platelet adhesion.
  • To assess the nanoparticles' capacity for anti-inflammatory peptide delivery and promotion of endothelial regeneration.

Main Methods:

  • Synthesis of sulfated poly(N-isopropylacrylamide) nanoparticles with collagen-binding properties.
  • In vitro assessment of nanoparticle adhesion to denuded endothelium under shear stress.
  • Quantification of cellular and platelet adhesion reduction in whole blood and platelet-rich plasma.
  • Evaluation of anti-inflammatory peptide loading, release, and cellular effects.
  • Assessment of endothelial cell migration and smooth muscle cell interaction.

Main Results:

  • Nanoparticles effectively targeted denuded endothelium via collagen binding.
  • Reduced cellular and platelet adhesion by 67% (whole blood) and 59% (platelet-rich plasma).
  • Delivered anti-inflammatory peptides, reducing endothelial and smooth muscle cell inflammation by 30% and 40%.
  • Promoted endothelial migration while avoiding smooth muscle cell uptake.
  • Demonstrated potential for dual therapy: reducing inflammation and promoting regeneration.

Conclusions:

  • Developed collagen-binding nanoparticles offer a promising dual-action therapeutic strategy for post-angioplasty treatment.
  • These nanoparticles can mitigate restenosis by reducing inflammation and platelet aggregation.
  • The system promotes endothelial regeneration, aiding recovery of the damaged vasculature.