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The effect of REDV/TiO

Xiangshan Xu1, Lijie Wang1, Guofeng Wang1

  • 1Department of Cardiology, 4th Affiliated Hospital of China Medical University, Shenyang, China.

Journal of Biomaterials Applications
|September 14, 2018
PubMed
Summary
This summary is machine-generated.

New drug-eluting stents coated with nano-TiO2 and REDV peptide show promise. These advanced coronary artery stents effectively reduce restenosis and promote healing, offering a potential improvement for patients with coronary artery disease.

Keywords:
REDVTiO2nickel ionpolydopaminere-endothelializationstent

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Area of Science:

  • Biomaterials Science
  • Cardiovascular Research
  • Nanotechnology

Background:

  • In-stent restenosis is a major complication of coronary artery stenting, often caused by smooth muscle cell proliferation and inflammation from released metal ions.
  • Promoting vascular endothelialization is crucial for stent performance and long-term patency.

Purpose of the Study:

  • To develop a novel stent coating to reduce metal ion release and inflammation.
  • To enhance endothelial cell adhesion and proliferation for improved re-endothelialization.
  • To evaluate the efficacy of the new stent coating in reducing in-stent restenosis in an animal model.

Main Methods:

  • A nano-TiO2 ceramic coating was applied to 316L stainless steel stents to minimize ion release and inflammation.
  • An Arg-Glu-Asp-Val (REDV) peptide coating was prepared on the TiO2 layer using polydopamine technology to promote endothelialization.
  • Corrosion tests were performed to assess nickel ion release.
  • In-vitro tests evaluated endothelial cell adhesion, proliferation, and nitric oxide concentration.
  • Stents were implanted in rabbit iliac arteries, followed by evaluation of in-stent restenosis and re-endothelialization at 28 days.

Main Results:

  • The nano-TiO2 coating effectively reduced nickel ion release from the 316L stainless steel.
  • The REDV/TiO2 coating significantly promoted endothelial cell adhesion and proliferation.
  • Increased nitric oxide concentration was observed with the REDV/TiO2 coating.
  • In vivo, REDV/TiO2-coated stents demonstrated a significant reduction in in-stent restenosis compared to bare metal and TiO2-coated stents.
  • Enhanced re-endothelialization was observed in the REDV/TiO2-coated stent group.

Conclusions:

  • The REDV/TiO2-coated stent effectively inhibits in-stent restenosis and promotes re-endothelialization.
  • This novel stent coating represents a promising strategy for improving outcomes in coronary artery disease treatment.
  • The combination of anti-corrosion and endothelialization-promoting properties makes REDV/TiO2-coated stents a potential advancement in cardiovascular interventions.