REGULATORY TSCELLS WITH SUPPRESSIVE ACTIVITY IN SURGICAL SEPSIS
Abstract. Present work aims to investigate functioning of the regulatory T-cells with suppressor activity in surgical sepsis. It has been shown that the septic patients with decreased T cell proliferation are characterized by enhanced relative contents of СD4+СD25+ lymphocytes, including СD4-CD25hig...
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| Autores principales: | , , , , , |
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| Formato: | article |
| Lenguaje: | RU |
| Publicado: |
SPb RAACI
2014
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| Materias: | |
| Acceso en línea: | https://doaj.org/article/1fe6989276b5426cbe2ab1ef69a30c81 |
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| Sumario: | Abstract. Present work aims to investigate functioning of the regulatory T-cells with suppressor activity in surgical sepsis. It has been shown that the septic patients with decreased T cell proliferation are characterized by enhanced relative contents of СD4+СD25+ lymphocytes, including СD4-CD25high. Moreover, a reverse correlation has been revealed between СD4+CD25+high and anti-CD3-induced proliferative response of mononuclear cells (MNC).Increased ratio of СD4+СD25+ cells is associated with arising suppressive activity of MNC, which is partially abrogated by addition of rIL-2. It should be noted that the depletion of CD25+ subpopulation is accompanied by increased T cell proliferation. Hence, a decrease in T cell proliferative activity in surgical sepsis is coupled with naturally occurring СD4+СD25+ regulatory T-cells (Trn).Furthermore, it has been demonstrated that the suppressive activity of MNCs in septic patients is mediated by soluble factors, in particular, IL-10. Indeed, septic patients are characterized by increased level of IL-10 production and enhanced number of CD4+IL-10+ T-cells. Addition of neutralizing anti-IL-10 antibody partially abrogated the suppressive activity of MNC supernatants. Thus, our study demonstrated that inducible regulatory T cells (Tr1) coupled to the naturally occurring СD4+СD25+ regulatory T-cells (Trn) actively contribute to genesis of immune pathology in sepsis. |
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