Blood-Compatible Materials: Vascular Endothelium-Mimetic Surfaces that Mitigate Multiple Cell-Material Interactions

Area of Science:

• Biomaterials Science
• Surface Chemistry
• Biomedical Engineering

Background:

• Blood-contacting medical devices often trigger adverse reactions like coagulation, inflammation, and infection.
• Current biomaterials typically address only one failure mode, limiting their effectiveness.
• Developing materials that manage multiple biological interactions is crucial for device safety and efficacy.

Purpose of the Study:

• To design and evaluate multifunctional surfaces for blood-contacting medical devices.
• To mitigate unfavorable biological reactions by integrating multiple surface features.
• To enhance blood compatibility beyond single-function approaches.

Main Methods:

• Incorporation of nitric oxide (NO) release into material surfaces.
• Surface chemistry and nanotopography modifications to mimic the endothelial glycocalyx.
• Evaluation of surface interactions with coagulation factors, inflammatory cells, and bacteria.

Main Results:

• Multifunctional surfaces demonstrated synergistic improvements in interactions with platelets, leukocytes, and bacteria.
• Nitric oxide release combined with glycocalyx mimicry significantly reduced adverse biological responses.
• The designed surfaces showed enhanced hemocompatibility compared to single-feature strategies.

Conclusions:

• Multifunctional surfaces are superior to single-function approaches for blood-contacting medical devices.
• Integrating NO release with endothelial glycocalyx mimicry offers a promising strategy for advanced biomaterials.
• Future blood-compatible materials must incorporate multiple features to address complex blood-material interactions effectively.