Dynamic changes and clinical significance of LXA(4) in the perioperative period of cardiopulmonary bypass

Dynamic changes in lipoxin A(4) (LXA(4)) in child patients with congenital heart disease (CHD), in the perioperative period of cardiopulmonary bypass (CPB) were studied. Peripheral blood was collected from 16 child patients (CPB group) before operation (Tc), after operation (T0), at 1 day after operation (T1), at 3 days after operation (T3), and at 7 days after operation (T7); and from 17 children with no CHD (control group). The level of LXA(4) in peripheral blood was detected via enzyme-linked immunosorbent assay (ELISA). Clinical data of the child patients were collected. The white blood cell (WBC) count, the proportion of neutrophils (N%) and high-sensitivity C-reactive protein (hs-CRP) levels were also detected, followed by statistical analysis. The plasma LXA(4) levels in CPB group at Tc were significantly lower compared to that in the control group (P<0.01). In CPB group, the level of LXA(4) showed an increasing trend at T0, WBC and hs-CRP were transiently increased at T0 and increased most significantly at T1. N% was obviously increased at T0 compared to that at Tc and was still significantly higher at T7 compared to that at Tc. The CPB time and aortic clamping time were positively correlated with the time in the Pediatric Intensive Care Unit (PICU), the application time of ventilator, and the hs-CRP level at T0. The LXA(4) level at each time-point had no correlation with other indexes. In conclusion, the inflammatory response after CPB increases the synthesis of LXA(4) with an anti-inflammatory effect, but LXA(4) cannot be used as a sensitive index for monitoring inflammation.