[Effects of cytokines on the immunogenic properties of hepatitis A vaccine]

Cytokines were found, in experiments with guinea pigs, to have a stimulating action on the immunogenic potency of hepatitis A vaccine (Hep-A-in-Vac). The most pronounced effects were produced by rhIL-1b, rhTNF-alpha, thymosin-a1, the "neothym" hybrid protein and immunophan. Injections of cytokines as of adjuvants stimulated the formation of antibodies titers that exceeded 2-10-fold those observed in control animals immunized by Hep-A-in-Vac alone. Immunization of guinea pigs made alongside with injections of the above cytokines ensured a 100% seroconversion in animals after the administration of drugs was completed. The number of seropositive animals in the control group was 75-89%.