Subpopulation spectrum of T lymphocytes (CD3+, CD4+, CD8+, CD25+, and CD3(+)25+) in thymus, spleen and inguinal lymphatic nodes have been studied in male mice after 20 days of psychoemotional stress produced by social defeats in daily agonistic confrontations. A reduction of total number of cells, of absolute numbers of all researched subpopulations of lymphocytes and % CD3+ cells in thymus of submissive mice was shown in comparison with intact animals. Reduction of total number of splenocytes and absolute numbers of CD4+ and CD8+ lymphocytes has been observed in a spleen of submissive mice. Besides, % CD3+, CD25+, CD4+ and CD25+ cells were increased in these animals in comparison with intact mice. The absolute number of cells with CD8 phenotype was increased in inguinal lymphatic nodes. The data obtained suggest that the chronic psychoemotional stress is accompanied by serious changes of the cellular link of immunity. The effect of chronic emotional social stress on mutual interaction of the central and peripheral links of immunity has been discussed.
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