The purpose of the study is to investigate changes in fibrinolytic and proteolytic activity of blood plasma in patients with peptic ulcer (PU) taking into account pathogenic Helicobacter pylori (Hp) strains.
Materials and methods. 93 patients with PU were examined, of which 30 patients with PU and concomitant Hp cag cag A+/vac A+ (group I), 31 patients with PU and concomitant Hp cag A-/vac A- (group II), 32 patients with PU without concomitant HP infection (group III). The control group consisted of 30 healthy individuals. Fibrinolytic activity of blood plasma was investigated with the help of lysis of azofibrin (fibrin associated with the azo dye orange), which in the alkaline medium turns a bright red color. The level of total (ТFA), enzymatic (FFA) and non-enzymatic fibrinolytic activity (NFA) was evaluated. Proteolytic activity of blood plasma was determined by the lysis of azoalbumin, azocasein and azokol.
Research results. The study of fibrinolytic activity of blood plasma showed that the total fibrinolytic activity of blood plasma (TFA) in all groups was significantly higher compared to the control indicators: in patients of group I by 61.5 %, in patients by 40.9 %, in patients of group III by 30.3 %, with a significant intergroup difference between the groups. The growth of TFA was mainly due to FFA. In patients of group I, FFA increased by 2.06 times (p < 0.05), and in patients of group II – by 1.79 times (p < 0.05), in patients of group IIІ – by 1.52 times (p < 0.05) compared with the control. In patients with group I, FFA increased by 12.5 % (p < 0.05) compared with group II. In all patients examined, there was an increase in the proteolytic activity of blood plasma, in particular in group I, the lysis of azoalbumin, azocasein and azocolol increased significantly 2.94 times, 2.83 times and 1.90 times, respectively, and in the patients of group II the investigated indicators increased accordingly 1.87-fold (p < 0.05), 1.96-fold (p < 0.05) and 1.40-fold (p < 0.05), in patients of group III, respectively 1.55 times (p < 0.05), 1.59 times (p < 0.05) and 1.18 times, compared to these values in almost healthy subjects. Significantly more significant changes in proteolysis were detected in the presence of pathogenic Hp strains.
Conclusion. Increased proteolytic and fibrinolytic activity of blood plasma is observed in patients with PU. The presence of concomitant Hp in PU leads to more pronounced changes in proteolysis and fibrinolysis. Pathogenic strains of Hp cag cag A+/vac A+ cause significantly more abnormalities in hemostasis.
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