Methylprednisolone prevents inflammatory reaction occurring during cardiopulmonary bypass: effects on TNF-α,IL-6,IL-8,IL-10

Abstract

Objective: This study examined the correlation between tumour necrosis factor-alfa (TNF-α), interleukin (IL)-6 and IL-8, IL-10 and methylprednisolone pretreatment.

Methods: This is a prospective, randomized and double-blinded study. Sixty patients undergoing coronary artery bypass grafting (CABG) were randomized to receive either intravenous methylprednisolone (n=30, Group M) or intravenous placebo (n=30, Group S). The patients received intravenously either 30 mg/kg methylprednisolone (Group M) or placebo (Group S) 10 min before and after cardiopulmonary bypass (CPB). In an intensive care unit (ICU), four additional doses were given at 6-hourly intervals. Blood samples for the measurements of TNF-α, IL-6, IL-8 and IL-10 were obtained before induction of anaesthesia (T0=control value), after induction (T1), before starting CPB (T2), after aortic declamping (T3), at the end of CPB (T4) and 6 hours (T5), 12 hours (T6) and 24 hours (T7) after skin closure. Creatine kinase (CK) and creatine kinase isoenzyme MB (CK-MB) were evaluated at the following intervals: T0, T5, T6 and T7.

Results: When compared with the control value, TNF-α, IL-6 and IL-8 significantly increased in Group S and Group M (p B-0.05), but these values were significantly greater in Group S than in Group M (p B-0.05). In comparison with the control value, IL-10 increased in both groups (p B-0.05), but was significantly greater in Group M than in Group S (p B-0.05). CK and CK-MB were increased in both groups in postoperative values compared to control values. In Group S, CK and CK-MB levels were significantly lower than in Group M (p B-0.05).

Conclusion: In this study, we have found that pre-operative administration of methylprednisolone has decreased TNF-α, IL-6 and IL-8 release, and increased the perfusing IL-10 levels after CPB. Thus, methylpredniso-lone may decrease the inflammatory response during the CPB procedure.

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