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• W2072036005 abstract "<b><i>Background:</i></b> Intraoperative hemolysis and inflammation are associated with acute kidney injury (AKI) following cardiac surgery. Plasma-free hemoglobin induces heme oxygenase-1 (HO-1) expression. HO-1 degrades heme but increases in experimental models of AKI. This study tested the hypothesis that plasma HO-1 concentrations are associated with intraoperative hemolysis and are increased in patients that develop AKI following cardiac surgery. <b><i>Methods:</i></b> We measured plasma HO-1, free hemoglobin, and inflammatory markers in 74 patients undergoing cardiopulmonary bypass (CPB). AKI was defined as an<b> </b>increase in serum creatinine concentration of 50% or 0.3 mg/dl within 72 h of surgery. <b><i>Results:</i></b> Twenty-eight percent of patients developed AKI. HO-1 concentrations increased from 4.2 ± 0.2 ng/ml at baseline to 6.6 ± 0.5 ng/ml on postoperative day (POD) 1 (p < 0.001). POD1 HO-1 concentrations were 3.1 ng/ml higher (95% CI 1.1-5.1) in AKI patients, as was the change in HO-1 from baseline to POD1 (4.4 ± 1.3 ng/ml in AKI patients vs. 1.5 ± 0.3 ng/ml in no-AKI patients, p = 0.006). HO-1 concentrations remained elevated in AKI patients even after controlling for AKI risk factors and preoperative drug therapy. Peak-free hemoglobin concentrations correlated with peak HO-1 concentrations on POD1 in patients that developed AKI (p = 0.02). Duration of CPB and post-CPB IL-6 and IL-10 concentrations were also associated with increased HO-1 on POD1. <b><i>Conclusion:</i></b> Plasma HO-1 is increased in patients that develop AKI, and CPB duration, hemolysis, and inflammation are associated with increased HO-1 concentrations following cardiac surgery. Strategies that alter hemolysis and HO-1 expression during cardiac surgery may affect risk for AKI." @default.
• W2072036005 created "2016-06-24" @default.
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• W2072036005 date "2014-01-01" @default.
• W2072036005 modified "2023-10-12" @default.
• W2072036005 title "Heme Oxygenase-1 and Acute Kidney Injury following Cardiac Surgery" @default.
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• W2072036005 doi "https://doi.org/10.1159/000357871" @default.
• W2072036005 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4024967" @default.
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