ABSTRACT
Objective:To explore CCR7 expression in splenic dendritic cells and its role in migration and activity of splenic dendritic cells in multiple organ dysfunction syndrome (MODS) in mice.Methods:The MODS model of mice was reproduced by Zymosan injection into peritoneal cavity.The mice were randomly divided into groups of normal,3-6 hours,24-48 hours and 10-12 days post zymosan injection.CD11c and CD205 were analysed by immunohistochemistry;The expression of CD86 and CCR7 of DCs were studied by the flow cytometry analysis.Results:In normal mice,many DC were found at the margin between the red and white pulp.In the 3-6 h and 24-48 h groups,CD86 and CCR7 were strongly up-regulated in the DC,and they distributed in T cells areas.In the 10-12 d group,DC distributed at the margin by the immature form.Conclusion:The CCR7 expression level of DC has close correlations with the migration of DC,CCR7 can be used to evaluate the migration and functional activity of DC in MODS.
ABSTRACT
Objective: To observe the effects of high-dose aprotinin and low-dose aprotinin on the inflammatory response induced by cardiopulmonary bypass (CPB). Methods: Thirty-two patients who underwent heart valve replacement were randomized in double-blind fashion into three groups: control group (n=6), low-dose group (n=13) and high-dose group (n=13). Blood samples were taken from radial artery at three times intervals: before CPB, at the end of CPB and 2 hours after termination of CPB. Neutrophil CD11b integrin expression, plasma level of tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6) were measured. Results: The high-dose group demonstrated no significant change in neutrophil CD11b expression and in plasma level of TNF-α, but a significant decrease in plasma level of IL-6. However, the low-dose group only demonstrated a lower CD11b expression and a lower TNF-α level at 2 h after CPB termination. Conclusion: Aprotinin has a dose-reponse effect. High-dose aprotinin is more effective in the reduction of inflammatory response induced by cardiopulmonary bypass.