Complement inhibition in biomaterial- and biosurface-induced thromboinflammation

Area of Science:

• Immunology
• Biomaterials Science
• Transplantation Medicine

Background:

• Therapeutic procedures increasingly use biomaterials, cells, and organs, posing challenges to the innate immune system.
• Exposure to foreign materials and damaged cells activates complement and contact/kallikrein systems, initiating a thrombo-inflammatory response.
• This response involves platelets, neutrophils (PMNs), and monocytes, potentially leading to adverse clinical outcomes.

Purpose of the Study:

• To review innate immune recognition mechanisms relevant to biomaterial and transplantation therapies.
• To identify key intervention points within the innate immune system to prevent adverse responses.
• To discuss novel surface modification techniques for biomaterials and cells to reduce thromboinflammation.

Main Methods:

• Conceptual review of innate immunity mechanisms.
• Analysis of thrombo-inflammatory pathways triggered by therapeutic interventions.
• Discussion of emerging surface modification strategies and inhibitor applications.

Main Results:

• Innate immune recognition pathways, particularly complement and contact/kallikrein systems, are central to biomaterial and transplant rejection.
• Thromboinflammation, a combined thrombotic and inflammatory response, is a significant risk associated with these therapies.
• Surface modification of biomaterials and cells with inhibitors presents a viable strategy to modulate immune responses.

Conclusions:

• Understanding innate immunity is crucial for managing risks associated with biomaterials and transplantation.
• Targeting specific immune recognition points and employing surface modification techniques can mitigate thromboinflammation.
• These approaches hold promise for improving the safety and efficacy of advanced therapeutic modalities.