Changes in the activity of metalloprotease ADAMTS13 antigen von Willebrand factor in patients with acute coronary syndrome

Abstract

Introduction. Currently, considerable attention is being given to the study of the interaction of the von Willebrand factor (vWF) and its specific regulator of metalloprotease ADAMTS13 in various clinical conditions accompanied by the development of thrombosis.Aim — to assess the change in the activity of ADAMTS13 metalloprotease and vWF factor antigen in patients with acute coronary syndrome during the first five days after the onset of an anginal attack.Patients and methods: The study included 90 patients aged 42 to 86 years (Me — 61.5 y.o.) hospitalized with a diagnosis of acute coronary syndrome. Of these, 69 were men (Me — 59 y.o.) and 21 women (Me — 63 y.o.). All patients were tested for ADAMTS13 activity, ADAMTS13 antigen, and vWF antigen. Blood samples for the study were obtained upon admission to the hospital (arterial and venous blood), as well as 24, 72 and 120 hours after hospitalization (venous blood).Results. It was found that at all points of the study, in patients without coronary artery thrombosis, the average value of the ADAMTS13 activity indicator was significantly higher compared to the group of patients with coronary artery thrombosis. At the same time, there were no statistically significant differences in the average values of the ADAMTS13 antigen between the compared groups of patients. The mean value of vWF antigen in patients with coronary artery thrombosis was significantly higher compared to that of patients without coronary artery thrombosis.Conclusion. An increase in ADAMTS13 activity was noted more often in patients with acute coronary syndrome without coronary artery thrombosis than in patients with coronary artery thrombosis, which may indicate the antithrombotic effect of ADAMTS13 metalloprotease. No differences were found in ADAMTS13 antigen levels when comparing the study groups of patients, which indicates a greater significance for the anticoagulant activity of the functional characteristics of ADAMTS13. Significantly higher levels of the vWF antigen in patients with coronary artery thrombosis were due to the response to ischemic myocardial injury and stress but were not the primary cause of the thrombotic event.