Extracellular DNA-A Danger Signal Triggering Immunothrombosis

Area of Science:

• Immunology
• Vascular Biology
• Molecular Medicine

Background:

• Clotting and inflammation are evolutionary defense mechanisms against injury and infection.
• Severe inflammation, however, can lead to detrimental thrombotic events, a process known as immunothrombosis.
• Key mediators in immunothrombosis include platelet granule factors, complement, lipid mediators, and integrins.

Purpose of the Study:

• To review the role of extracellular DNA in immunothrombosis.
• To discuss rodent models used to study immunothrombosis.
• To explore extracellular DNA as a potential therapeutic target.

Main Methods:

• Review of rodent models of immunothrombosis.
• Analysis of evidence for extracellular DNA's role in inflammation and clotting.
• Discussion of fluorescence tissue imaging and deoxyribonuclease (DNase) studies.

Main Results:

• Extracellular DNA, released by pathogens, dying cells, and neutrophils (as NETs), promotes inflammation and thrombosis.
• Extracellular DNA is localized to injury sites and thrombi.
• Studies using DNase demonstrate extracellular DNA's contribution to immunothrombosis.

Conclusions:

• Extracellular DNA is a significant driver of immunothrombosis.
• Rodent models provide valuable insights into this process.
• Extracellular DNA presents a promising, yet challenging, therapeutic target.