PROTEASOME MECHANISMS OF THE DEVELOPMENT OF TOLERANCE TO ALLOGRAFT IN WISTAR AND AUGUST RATS WITH DIFFERENT CONTENT OF MONOAMINES IN THE BRAIN

The aim of the work was to compare proteasome mechanisms of the development of donor-specific tolerance (DST) to ovarian allograft in outbred Wistar rats and inbred August rats with the increased level of monoamines and stress limiting systems in the brain. In spite of DST induction in all animals, engraftment was more effective in Wistar rats. In the liver of all rats with survived allograft, the level of proteasome immune subunt LMP2, evaluated by Western blotting, was significantly higher than in control false-operated rats. This difference was more pronounced in Wistar rats. Besides, in the liver of all rats with survived allografts, the level of proteasome PA28αβ activator was higher than in control. In conclusion, the development of DST is connected with the enrichment of liver proteasome pool by immune forms containing LMP2 subunit and PA28αβ activator. This process is partially suppressed in August rats under stress conditions of the central nervous system.