ADHESION MOLECULES IN INTESTINAL DESTRUCTIVE-INFLAMMATORY PROCESS IN THE CHILDREN WITH ULCERATIVE COLITIS

Aim: to study the content of serum soluble cell adhesion molecules in children with ulcerative colitis that mediate the initial and final stages of the migration of leukocytes to the focus of inflammation: sP-selectin (soluble platelet selectin) and Specam-1 (soluble platelet-endothelial cell adhesion molecule 1) as well some earlier unexplored factors associated with their level. Patients and methods: we examined 107 patients with ulcerative colitis aged from 6 up to 17 years. The diagnosis was set on the base of a comprehensive examination. The content of serum soluble adhesion molecules sP-selectin and sPECAM-1 as well cytokine status and neopterin were evaluated by ELISA. Respiratory metabolism was investigated by using chemiluminescent reactions. Results: it was shown that the content of sP-selectin and sPECAM-1 is significantly higher in patients than in the control group, which may influence on the migration of leukocytes into tissues for realization of their effector potential. It is confirmed by morphological analyses of the intestine biopsies, where it was observed the increasing of the number of leukocytes in vascular endothelium and epithelial layer. At the same time strengthening of the oxygen-dependent metabolism of neutrophils, the increase of the concentration of neopterin and tumor necrosis factor α were noted. Conclusions: the correlation of the studied adhesion molecules with a number of inflammatory markers (TNFα (tumor necrosis factor α), free radicals, neopterin) was revealed, which indicates the diagnostic value of serum levels of the membrane antigens. The increase of the concentration of adhesion molecules sP-selectin and sPECAM-1 may be one of the links of the pathogenesis of ulcerative colitis.

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