[New Data on the Localization of the Vasopressin V2­Receptor in Patients With Essential Hypertension 2-3 Degree And Healthy Persons].

AIM: to compare the percentage of endothelial progenitor cells and exfoliated endothelial cells in the total number of cells of lymphocytic fraction in patients with essential hypertension (EH) and practically healthy persons, and to evaluate expression of vasopressin V2 receptor on the endothelial progenitor cells. MATERIALS AND METHODS: We examined 20 patients with 2-3­degree EH and 10 practically healthy persons. Clinical examination of patients included electrocardiography, echocardiography, biochemical blood analysis / isolation of Endothelial progenitor cells were isolated from blood plasma. Immunocytochemical study was performed by the method of combined staining using primary and secondary antibodies. Microscope Olympus FV10i was used for confocal microscopy of endothelial progenitor cells and exfoliated endothelial cells. RESULTS: The percentage of endothelial progenitor cells (phenotype CD31+СD133+) in the total number of cells of the lymphocytic fraction was significantly higher in patients with EH in comparison with healthy individuals (p=0.013 and p=0.008 for 2 and 3 degrees EH, respectively). The percentage of exfoliated endothelial cells (phenotype СD31+СD133-) in the total number of cells of the lymphocytic fraction was also significantly higher in patients with EH in comparison with healthy individuals (p=0.008 and p=0.019 for 2 and 3 degrees EH, respectively). For the first time we identified the localization of vasopressin V2-receptor on the membrane of endothelial progenitor cells. CONCLUSION: In patients with 2-3 degrees EH the percentage of endothelial progenitor cells and exfoliated endothelial cells of the total number of cells of the lymphocytic fraction is significantly was found to be increased. Localization of vasopressin V2­receptor on the membrane of endothelial progenitor cells was detected.