Inhibition of T cells by direct contact with macrophages after murine-amputation injury / 中华创伤杂志(英文版)
Chinese Journal of Traumatology
;
(6): 41-44, 1998.
Artículo
en Inglés
| WPRIM
| ID: wpr-268440
ABSTRACT
OBJECTIVE:
To determine whether macrophages post trauma have inhibitory effect on normal T cells via direct cell to cell contact.METHODS:
A murine amputation injury model was used, macrophages were harvested from abdominal cavity and treated with mitomycin-C to abrogate the secretion of cytokines. Separation of T cells from splenocytes in normal mice was performed using nylon column method. Mitomycin-C treated macrophages from control and traumatized mice were added into the normal T cell culture systems, then various parameters of T cell functions were determined.RESULTS:
The production and secretion of interleukin 1 (IL-1), interleukin 6 (IL-6), tumor necrosis factor (TNF) and prostaglandin E-2 (PGE-2) could be abrogated after macrophages were treated with 25 &mgr;g/mL mitomycin-C for 30 minutes. Mitomycin-C treated macrophages from traumatized mice could obviously suppress T lymphocyte transformation, IL-2 mRNA and IL-2Ralpha mRNA levels, IL-2 production, IL-2Ralpha expression, IL-2 mediated lymphocyte proliferation response of normal T cells, could not affect IL-2-IL-2R interaction but elevated suppressive action of Ts cells. Removal of Ts cells from T cells could almost abolish the inhibition of macrophages.CONCLUSIONS:
Macrophages post trauma can suppress T cell functions by depressing IL-2 and IL-2Ralpha gene expression via direct cell to cell contact, and this effect may be mediated mainly by increasing the action of Ts cells.
Texto completo:
Disponible
Índice:
WPRIM (Pacífico Occidental)
Tipo de estudio:
Estudio pronóstico
Idioma:
Inglés
Revista:
Chinese Journal of Traumatology
Año:
1998
Tipo del documento:
Artículo
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