THE ROLE OF ENDOTHELIAL DYSFUNCTION IN INFLAMMATORY BOWEL DISEASES

The purpose of the study – to assess the disorders’ degree of endothelium dysfunction inpatients with nonspecific ulcerative colitis (NUC) and Crohn's disease (CD), dependingon the severity of inflammation.Material and methods. 34 patients with NUC and 18 people with CD with continuousrecurrent courses, 15 patients with NUC and 15 patients with CD in remission wereobserved. The control group included 30 healthy volunteers.Results. It has been established that patients with active NUC had a significantly higherlevel of markers characterizing changes of proliferative (VEGF-165) and adhesive(VCAM-1) endothelial functions vs. control (in 4.62 and 2.01 times) and patients whohad an inactive disease (at 3.95 and 4.62) (p<0.05). In the active course of NUC, VEGF-165 level increased by 3.27 and 5.03 times, the level of VCAM by 1.83 and 2.09 times vs.inactive and control group (p<0.05).In patients with severe and moderate degrees of NUC, we have set an increase in theconcentration of VEGF-165 compared with mild degree, p<0.05. It has been proven thatin severe degree of CD, the concentration of VEGF-165 increased 21.5% vs. moderateactivity and 63.1% vs. mild activity, p<0.05.It has been established that adhesive phenotype of endothelial dysfunction with severeactivity of NUC was associated with an elevated content of adhesion molecule, dependingof activity, p<0.05. The adhesive phenotype of endothelial dysfunction is proved forpatients with severe activity of CD compared with moderate and mild activity, p<0.05.We have revealed a reliable direct regression relationship between the concentration ofthe vascular endothelial growth factor and the activity of UC according to the TrueloveWitts scale (R=0.29, p<0.05), between the CDAI index level in CD and the content ofVCAM-1 (R=0.29, p<0.05).Conclusions. Inflammatory bowel diseases - NUC and CD are accompanied withendothelium dysfunction, proliferative and adhesive phenotypes, associated with theactivity of process.