Study dynamics of IFNalpha, IFNgamma, TNFalpha cytokines in healthy adults after administration of inactivated subunit monovalent influenza vaccine, A/California/7/2009 (H1N1) strain.
Levels of IFNalpha, IFNgamma, TNFalpha cytokines were studied in blood sera of 58 mostly healthy adults aged 18 - 60 years. Kits for enzyme immunoassay determination of cytokine levels (Vector-Best, Novosibirsk) were used in the study. Antibody titers to A/California/7/2009 (H1N1) strain were determined at analogous time by using microneutralization reaction (MNR).
Changes in the level of IFNalpha, IFNgamma, TNFalpha in healthy volunteers immunized by pandemic influenza vaccine were evaluated. Vaccine was safe. Two immunizations did not result in an increase of TNFalpha level that is an additional evidence of vaccine safety. IFNalpha level had a tendency to increase in vaccinated volunteers. IFNgamma levels in volunteers with normal level of this cytokine (below 10 pg/ml) were increased significantly after the second immunization (from 2.66 +/- 2.48 to 5.21 +/- 2.56). Correlation analysis showed that there is a strong negative association between IFNalpha, IFNgamma and seroconversion.