Soluble crosslinked fibrin(ogen) polymers.

Area of Science:

• Biochemistry
• Hematology

Background:

• Fibrinogen and fibrin are key components of blood clots.
• Factor XIIIa (FXIIIa) is essential for stabilizing fibrin clots.
• Understanding fibrin-fibrinogen interactions is vital for hemostasis research.

Purpose of the Study:

• To investigate the formation of fibrin-fibrinogen associations.
• To characterize the structure and size of these polymers.
• To explore their potential as a diagnostic marker for disseminated intravascular coagulation (DIC).

Main Methods:

• SDS agarose-polyacrylamide gel electrophoresis under non-reducing conditions.
• Ultracentrifugation on urea-sucrose density gradients.
• Incubation of radiolabeled fibrinogen and desAA-fibrin with FXIIIa in the presence of fibrinolysis inhibitors (aprotinin and EACA).

Main Results:

• Formation of soluble, cross-linked, high molecular weight (HMW) fibrin-fibrinogen polymers.
• Polymers were up to 10 times the molecular size of fibrinogen.
• Approximately 5% of fibrinogen and 80% of fibrin were incorporated into these polymers.

Conclusions:

• Soluble cross-linked fibrin-fibrinogen polymers are formed in the presence of FXIIIa.
• Detection of these polymers may serve as a diagnostic criterion for impending DIC.