Determination of the Expression of CD69 Marker of Early Activation in the Immune Mice Lymphocytes after their Stimulation with Plague Agent Antigens

Evaluated was the ability of plague microbe antigens F1 and V to activate specifically in the in vitro system subpopulations of T-lymphocytes of BALB/c mice immunized against plague. The level of CD69 expression at the lymphocytes surface was proposed to be evaluated as the marker of lymphocytes activation. Expression of CD69 early marker of activation in subpopulations of T-helpers and cytotoxic lymphocytes, reciprocated by the in vitro stimulation with Y. pestis F1, correlated with the intensity of the anti-plague postvaccinal immunity induced by immunization with F1 or F1and V antigens mixtures.