NCIt definition : A human anti-factor XI (FXI) monoclonal antibody, with potential anti-thrombotic activity.
Upon administration, abelacimab targets and binds to the catalytic domain of FXI,
thereby inactivating FXI, and also inhibits the activated form of FXI factor XIa.
This prevents the activation of factor XIIa (FXIIa). The abrogation of FXI activation
prolongs the activated partial thromboplastin time (aPTT) and reduces platelet and
fibrin accumulation. This results in the inhibition of contact activation-initiated
blood coagulation and prevents thrombus formation. FXI contributes to thrombotic disease
while playing a limited role in normal hemostasis. Activation of FXI is essential
for thrombus growth and stabilization.;