Related Experiment Video
Updated: May 5, 2026
09:22
Fabricating Superhydrophobic Polymeric Materials for Biomedical Applications
Published on: August 28, 2015
19.8K
Slippery dopamine-fluoropolymer hybrid surface for improving biliary stent longevity
Tae Young Kim1, Won-Jong Lee2, Yurim Lee1
1School of Electrical and Electronic Engineering, Yonsei University, 50-1 Yonsei-ro, Seodaemun-gu, Seoul, 03722, Republic of Korea.
Bioactive Materials
|February 24, 2026
Summary
A novel anti-fouling stent coating, Enhanced Longevity by anti-fouling Functional coating for Stent (ELFS), significantly reduces foreign body reaction and prevents occlusion. This innovation maintains stent patency, addressing a key limitation in biliary obstruction treatment.
Area of Science:
- Biomaterials Science
- Gastroenterology
- Medical Device Engineering
Background:
- Biliary obstruction causes bile retention, leading to liver injury and failure.
- Biliary stents are crucial for restoring bile flow but often occlude due to foreign body reaction, fibrosis, and biofilm formation.
- Current stent technology faces limitations in long-term patency and biocompatibility.
Purpose of the Study:
- To develop and evaluate a novel anti-fouling stent coating, ELFS, to prevent stent occlusion and improve outcomes in biliary obstruction.
- To investigate the efficacy of ELFS in mitigating foreign body reaction and biofilm formation.
- To assess the long-term patency and biocompatibility of ELFS-coated stents in preclinical models.
Main Methods:
- Fabrication of ELFS coating using a dip-coating process with a polydopamine adhesion layer.
- Intravital imaging in mice to assess neutrophil adhesion and foreign body response to coated and uncoated stents.
- Long-term implantation studies in mice and rabbits to evaluate biofilm formation and stent patency.
- Histopathological analysis to quantify fibrosis and liver damage.
Main Results:
- ELFS coating significantly suppressed neutrophil recruitment (>20-fold reduction at 3h) compared to non-coated stents, mitigating foreign body reaction.
- ELFS-coated stents remained free of biofilm for over six months in mice.
- ELFS-coated stents maintained patency for two months in a rabbit common bile duct model, unlike non-coated stents which occluded completely.
- Non-coated stents led to significant bile duct dilation, hepatomegaly, and fibrosis.
Conclusions:
- The ELFS coating is a promising strategy to enhance stent longevity and prevent occlusion in biliary applications.
- ELFS effectively inhibits early inflammatory responses and biofilm formation, crucial for maintaining stent patency.
- This novel coating technology holds potential for improving treatment outcomes for patients with biliary obstruction.
