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Journal Article
Randomized Controlled Trial
Research Support, Non-U.S. Gov't
Remote ischemic preconditioning upregulates microRNA-21 to protect the kidney in children with congenital heart disease undergoing cardiopulmonary bypass.
Pediatric Nephrology 2018 May
BACKGROUND: Acute kidney injury (AKI) is one of the most common emergencies and severe diseases in the clinic. We sought to verify whether remote ischemic preconditioning (RIPC) has a protective effect on the kidney of child with congenital heart disease undergoing cardiopulmonary bypass (CPB) surgery. We hypothesized it may be related to the up-regulation of microRNA-21 (miR-21).
METHODS: We performed a prospective randomized clinical study among children with congenital heart disease undergoing CPB surgery between January and December 2016. Children were randomized to an RIPC or control group. Patients in each group were divided into an AKI and a non-AKI group according to the occurrence of AKI at 48 h after surgery. Remote ischemic preconditioning (RIPC) conducted by blood-pressure cuff was performed 12 h before surgery. Serum creatinine (SCr ), tumor necrosis factor-α (TNF-α), and miR-21 expression in blood and urine were measured at different time points.
RESULTS: A total of 449 cases (200 RIPC; 249 controls) were enrolled. The male/female ratio was 1.18, with a mean age of 37.50 ± 25.31 months. The incidence of AKI in the RIPC group was significantly lower than that in the control group (19.0% vs. 46.2%, P<0.01). In further analysis, at 6 h, 24 h, and 48 h after CPB operation, blood TNF-α levels were significantly lower in the RIPC group than in the control group (P<0.01); at 24 h, 48 h, and 72 h, urine TNF-α levels were significantly lower in the RIPC group than in the control group (P<0.05). Urine and blood miR-21 expression in the RIPC group increased significantly, while there was no obvious change in the control group.
CONCLUSIONS: Remote ischemic preconditioning has a protective effect on the kidney in children with congenital heart disease, which may be related with the up-regulation of miR-21 and down-regulating the inflammatory mediator, such as TNF-α.
METHODS: We performed a prospective randomized clinical study among children with congenital heart disease undergoing CPB surgery between January and December 2016. Children were randomized to an RIPC or control group. Patients in each group were divided into an AKI and a non-AKI group according to the occurrence of AKI at 48 h after surgery. Remote ischemic preconditioning (RIPC) conducted by blood-pressure cuff was performed 12 h before surgery. Serum creatinine (SCr ), tumor necrosis factor-α (TNF-α), and miR-21 expression in blood and urine were measured at different time points.
RESULTS: A total of 449 cases (200 RIPC; 249 controls) were enrolled. The male/female ratio was 1.18, with a mean age of 37.50 ± 25.31 months. The incidence of AKI in the RIPC group was significantly lower than that in the control group (19.0% vs. 46.2%, P<0.01). In further analysis, at 6 h, 24 h, and 48 h after CPB operation, blood TNF-α levels were significantly lower in the RIPC group than in the control group (P<0.01); at 24 h, 48 h, and 72 h, urine TNF-α levels were significantly lower in the RIPC group than in the control group (P<0.05). Urine and blood miR-21 expression in the RIPC group increased significantly, while there was no obvious change in the control group.
CONCLUSIONS: Remote ischemic preconditioning has a protective effect on the kidney in children with congenital heart disease, which may be related with the up-regulation of miR-21 and down-regulating the inflammatory mediator, such as TNF-α.
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