Monocytes regulate systemic coagulation and inflammation in abdominal sepsis.

Area of Science:

• Immunology
• Hematology
• Pathophysiology

Background:

• Abdominal sepsis causes significant systemic inflammation and coagulation alterations.
• The precise role of peripheral blood monocytes in sepsis-induced coagulation changes remains unclear.

Purpose of the Study:

• To investigate the role of peripheral blood monocytes in regulating systemic coagulation during abdominal sepsis.
• To analyze the effects of monocyte depletion on thrombin generation and coagulation factor consumption.

Main Methods:

• Abdominal sepsis was induced in mice via cecal ligation and puncture (CLP).
• Monocyte depletion was achieved using clodronate liposomes.
• Systemic coagulation parameters, inflammatory markers (IL-6, CXC chemokines), and myeloperoxidase activity were assessed.

Main Results:

• Monocyte depletion significantly altered thrombin generation dynamics, increasing peak and total thrombin generation.
• Depletion of monocytes reduced levels of thrombin-antithrombin complexes and increased procoagulant factors.
• Monocyte depletion attenuated CLP-induced increases in IL-6, CXC chemokines, and myeloperoxidase activity.

Conclusions:

• Peripheral blood monocytes play a critical role in regulating systemic coagulation during abdominal sepsis.
• Targeting monocyte function represents a potential therapeutic strategy for managing sepsis-associated coagulopathy and inflammation.