Strategies for Improving Endothelial Cell Adhesion to Blood-Contacting Medical Devices

Area of Science:

• Biomaterials Science
• Cardiovascular Engineering
• Cell Biology

Background:

• The endothelium maintains blood vessel health and regulates clotting.
• Implantable cardiovascular devices risk thrombosis due to lack of a stable endothelial cell (EC) monolayer.
• Current devices often lead to EC loss under blood flow shear stress.

Purpose of the Study:

• To review techniques for enhancing endothelial cell (EC) adhesion and retention on blood-contacting cardiovascular devices.
• To address the clinical challenge of achieving stable endothelialization for improved device performance.
• To identify strategies that could reduce reliance on long-term anticoagulation therapy.

Main Methods:

• Summarizing existing literature on surface modifications for EC adhesion.
• Reviewing material coatings and nanofiber topology approaches.
• Examining cell-based modification strategies for improved EC retention.

Main Results:

• Various methods show promise for EC retention in vitro and in animal models.
• No current technique has consistently achieved stable clinical endothelialization.
• Significant challenges remain in translating laboratory findings to clinical practice.

Conclusions:

• Improving endothelial cell (EC) adhesion is key to preventing thrombosis in cardiovascular implants.
• Successful endothelialization could enhance device patency and patient outcomes.
• Further research is needed to develop clinically viable strategies for stable endothelialization.