Subpopulation of cytotoxic lymphocytes CD8 having both secretory and cytolytic antiviral activity is supposed to play the essential role in the virus elimination. Inflammatory reactions are also of importance in the hepatitis C pathogenesis, their intensity being regulated by anti-inflammatory cytokins. This study was aimed at determination of lymphocyte subpopulation indices--the relative content of cells carrying markers CD4, CD8, CD16, CD19, CD72, the parameters of the phagocytic activity of granulocytes and monocytes, as well as serum concentrations of anti-inflammatory cytokines IL-1, IL-6 and TNF-alpha. These indices were evaluated in a group 132 patients with confirmed hepatitis C or mixed hepatitis B + C diagnosis, depending on the disease form and markers of the infectious process activity (as determined in the PCR test for hepatitis C virus RNA) in comparison with a group of healthy donors. In patients with variant hepatitis under study a growth in anti-inflammatory mediators concentration was observed along with decreased indices of lymphocyte subpopulations responsible for cell-mediated immunity and the phagocytosis parameters. In the case of mixed hepatitis these differences were shown to be more manifested.
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