ABSTRACT
OBJECTIVE AND DESIGN: We investigated the influence of acute inflammation in skin isograft acceptance. METHODS: Two mouse lines selected for maximal (AIRMAX) or minimal inflammatory response (AIRMIN) were transplanted with syngeneic skin. Cellular infiltrates and cytokine production were measured 1, 3, 7 or 14 days post-transplantation. The percentage of CD4+CD25+Foxp3+ cells in the lymph nodes was also evaluated. RESULTS: Grafts were totally accepted in 100% of AIRMAX and in 26% of AIRMIN mice. In the latter, partial acceptance was observed in 74% of the animals. Emigrated cells were basically PMN and were enhanced in AIRMAX transplants. IL-10 production by graft infiltrating cells showed no interline differences. IFN-gamma was increased in AIRMIN grafts at day 14 and lower percentages of CD4+CD25+Foxp3+ cells in the lymph nodes were observed in these mice. CONCLUSIONS: Our data suggest that differences in graft acceptance might be due to a lack of appropriate regulation of the inflammatory response in AIRMIN mice compromising the self/non-self recognition.
