The content of cytokines of type Tx1 (IL-2 and IFN-gamma) and type Tx2 (IL-4) in blood sera of 132 patients with hepatitis C and the combined form of hepatitis B + C was studied. For control, blood sera taken from healthy donors were used. A significant increase, in comparison with the control, in the content of IL-4 in all subgroups of the patients was registered. The content of IFN-gamma reached the maximum level in patients with acute hepatitis C with the positive result of the polymerase chain reaction (PCR) for the virus (216.4 and 46.4 pg/ml respectively) and was somewhat lower in acute hepatitis C with the negative PCR-result (77.7 and 9.6 pg/ml), mean while in the chronic course of hepatitis C these data were within the limits of control values irrespective of the results of PCR. In case of mixed infection in the acute clinical form a significant increase in the concentration of IFN-gamma (34.4 pg/ml) in comparison with the control (25.3 pg/ml) was observed. The content of IFN-gamma in patients with acute hepatitis C and the positive result of the test for NS antibodies also reached the maximum level (207.3 and 42.7 pg/mg respectively). But in contrast to hepatitis C in the acute form with the negative results of PCR in patients with hepatitis C in the acute form and the negative results of the NS test these data were within the limits of control values, as well as in the chronic course of hepatitis C irrespective of the results of the NS antibodies serum test. In case of mixed infection a significant increase in the concentration of IFN-gamma was registered in the subgroup of patients with the acute form of NS+ (39.9 pg/ml). The data obtained in this study were indicative of significant changes in the serum profile of serum cytokines of types Tx1 and Tx2 in different forms and courses of virus hepatitis. This makes it possible to believe that the chronization of the process was associated with the prevalence of the Tx2 function.
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