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Updated: Feb 1, 2026

Ferromagnetic Bare Metal Stent for Endothelial Cell Capture and Retention
Published on: September 18, 2015
Amine-functionalized surface modification accelerates endothelialization of intracranial stents
Naoki Inuzuka1, Yasuhiro Shobayashi1, Satoshi Tateshima2
1R&D Department, N.B. Medical Inc, Tokyo, Japan.
The AEGiS surface modification enhances vitronectin adsorption, promoting faster endothelial cell coverage on neurovascular stents. This amine functionalization shows potential for improving stent performance and patient outcomes.
Area of Science:
- Biomaterials Science
- Medical Device Engineering
- Vascular Biology
Background:
- Neurovascular stent success depends on balancing antithrombotic properties with rapid endothelialization.
- A previously developed amine-functionalized surface modification, AEGiS Technology, demonstrated antithrombotic behavior.
Purpose of the Study:
- To evaluate the pro-endothelialization properties of AEGiS Technology.
- To explore the underlying mechanism of AEGiS-mediated endothelialization.
Main Methods:
- Compared AEGiS-modified and control NiTi surfaces for extracellular matrix protein adsorption, focusing on vitronectin.
- Quantified human umbilical vein endothelial cell (HUVEC) adhesion, retention, migration, and surface coverage in vitro.
- Assessed endothelial coverage of AEGiS-coated stents in a porcine model at 1 week using angiography and histology.
Main Results:
- AEGiS surface selectively increased vitronectin adsorption compared to controls.
- AEGiS supported greater HUVEC adhesion and stronger retention, accelerating substrate coverage in vitro.
- In vivo, AEGiS-modified stents exhibited enhanced endothelial coverage at 1 week.
Conclusions:
- Amine functionalization via AEGiS enriches vitronectin adsorption.
- This enrichment supports early endothelial coverage, demonstrating AEGiS's potential for neurovascular stent endothelialization.
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