КЛИНИКО-ПАТОФИЗИОЛОГИЧЕСКИЕ АСПЕКТЫ МИКРОВЕЗИКУЛЯРНОГО СОСТАВА ПЕРИФЕРИЧЕСКОЙ КРОВИ У БЕРЕМЕННЫХ С ПРЕЭКЛАМПСИЕЙ

Abstract

Abstract. Introduction. Preeclampsia is a pregnancy complication characterized by the development of arterial hypertension after 20 weeks of gestation, proteinuria, and/or oedemas. The pathogenesis of preeclampsia remains unclear to this day. Some studies have shown the importance of microvesicles in the pathogenesis of various pathological conditions. Involvement of microvesicles in the preeclampsia pathogenesis is a relevant issue. Taking into account all of the above, we have made an attempt to consider the pathogenesis of preeclampsia from the perspective of clinical and laboratory data. Aim. To establish the importance of microvesicles circulating in peripheral blood, their quantity and phenotype in the pathogenesis of preeclampsia. Materials and Methods. A one-stage cohort study was conducted, including 105 pregnant women: 30 pregnant women with severe preeclampsia (group 1), 35 pregnant women with mild preeclampsia (group 2), and 40 pregnant women without hypertensive syndrome (group 3), at 29–40 weeks of gestation. All patients were delivered surgically (Joel-Cohen laparotomy, cesarean section in the lower segment). All pregnant women underwent blood sampling to define the number and phenotypes of microvesicles (using flow cytometry) and laser scanning microscopy of the clot to confirm the presence of microvesicles of placental origin containing tissue factor, as well as the lipopolysaccharide of gram-negative microorganisms. Results and Discussion. In the group of patients with severe preeclampsia, a statistically significant increase was found in the number of placental, erythrocyte microvesicles, microvesicles with the tissue factor and lipopolysaccharide, compared to the group of patients with mild preeclampsia and pregnant women without hypertensive syndrome. In the group of patients with mild preeclampsia, a statistically significant increase was found in microvesicles with tissue factor and lipopolysaccharide, compared to pregnant women without hypertensive syndrome. The data obtained from the study confirm the fact that severe preeclampsia is a separate nosological entity, most likely pregnancy-associated thrombotic microangiopathy. Conclusions. The data obtained from the study indicate the need for further research to clarify the importance of microvesicles in the preeclampsia pathogenesis.