THE EFFECT OF B. subtillis ІМV B-7724 LECTIN ON FUNCTIONAL ACTIVITY OF THE MAIN EFFECTORS OF ANTITUMOR IMMUNITY OF INTACT MICE

Aim. The purpose of the study was to evaluate the effect of B. subtilis IMV B-7724 lectin on the functional activity of macrophages (Mph) and natural killer cells (NK) of intact Balb/c mice. Materials and Methods. Balb/c mice were subjected to 10 consecutive administrations of the lectin in a dose of 1 mg/kg of body weight. The functional activity of peritoneal Mph and NK were studied. Statistical analysis of the results was performed according to the widely accepted methods of variational statistics. Results. Administration of bacterial lectin increased Mph and NK cytotoxic activity; maximal increase was registered after the complete course of injections. A significant increase in the NO production indicates the polarization of peritoneal Mph into pro-inflammatory type M1. The transcription factors of IRF (at the early stage) and STAT (at the latter stages) signalling pathways were involved in the process of Mph polarization. Conclusion. The ability of B. subtillis IMV B-7724 lectin to increase in vivo cytotoxic activity of innate immunity effectors and to maintain the long-term Mph M1 polarization urges further studies on the lectin effectiveness.