[Thymosin alpha-1 and hybrid proteins consisting of tumor necrosis factor-alpha and thymosin alpha-1 enhance the efficacy of vaccination against the causative agent of plague].

The influence of the preparation of chemical thymosin alpha 1 (T), recombinant thymosin alpha 1 (rT), tumor necrosis factor (TNF) and hybrid proteins on their basis (T-TNF, TNF-T and T-TNF-T) on the effectiveness of immunization against Y.pestis have been studied. The preparations of T and hybrid proteins exhibit immunostimulating action, enhancing specific immunity when injected at different periods of the vaccinal process against Y.pestis virulent strain 231 in experiments on mice and guinea pigs. The highest effectiveness and reproducibility of results is observed after the use of hybrid protein T-TNF-T. An increase in immunity after the use of the preparations of hybrid proteins is accompanied by the activation of its T-cell element. The influence of rT on the restoration of the immune system of white mice after their exposure to sublethal doses of gamma radiation has been shown.