Changes in infant porcine pulmonary tissue oxylipins induced by cardiopulmonary bypass.

Autor: Iguidbashian KG; Department of Pediatrics, University of Colorado/Children's Hospital of Colorado, Aurora, CO, USA., Robison J; Department of Pediatrics, Washington University in St. Louis, St. Louis, MO, USA., Khailova L; Department of Pediatrics, University of Colorado/Children's Hospital of Colorado, Aurora, CO, USA., Jaggers J; Department of Surgery, University of Colorado, Aurora, CO, USA., Ing R; Department of Anesthesiology, University of Colorado, Aurora, CO, USA., Lawson S; Heart Institute, Children's Hospital Colorado, Aurora, CO, USA., Osorio Lujan SM; Department of Pediatrics, University of Colorado/Children's Hospital of Colorado, Aurora, CO, USA., Klawitter J; Department of Anesthesiology, University of Colorado, Aurora, CO, USA., Davidson JA; Department of Pediatrics, University of Colorado/Children's Hospital of Colorado, Aurora, CO, USA. jesse.davidson@childrenscolorado.org.
Jazyk: angličtina
Zdroj: Pediatric research [Pediatr Res] 2022 Nov; Vol. 92 (5), pp. 1274-1281. Date of Electronic Publication: 2022 Jun 09.
DOI: 10.1038/s41390-022-02125-5
Abstrakt: Background: Oxylipins are metabolites derived from fatty acids such as arachidonic acid (AA) and are key mediators in inflammation, host defense, and tissue injury. Serum oxylipins increase in adults after cardiopulmonary bypass (CPB) but tissue-level changes are poorly defined. The objective of this study was to characterize pulmonary tissue oxylipins in an infant porcine model of CPB with deep hypothermic circulatory arrest (DHCA).
Methods: Infant pigs underwent CPB with DHCA. Controls received anesthesia only. Right upper and lower lobes of the lung underwent oxylipin analysis via liquid chromatography-tandem mass spectrometry. One-way ANOVA was utilized to assess differences in oxylipin concentrations across groups, followed by pairwise comparisons.
Results: AA and multiple AA metabolites via cytochrome P450 (CYP450), lipoxygenase (LOX), and cyclooxygenase (COX) pathways were significantly increased in the upper and lower lobe of pigs exposed to CPB/DHCA as compared to controls. Multiple prostaglandin metabolites produced via COX were also significantly elevated in the lower lobes of control animals.
Conclusions: CPB/DHCA induces a significant increase in pulmonary tissue AA, with subsequent metabolism via COX, LOX, and CYP450 pathways. Interestingly, prostaglandins were also elevated in the lower lobes of the controls, suggesting a mechanism separate from CPB/DHCA. Future oxylipin studies are needed to better understand CPB-induced acute lung injury.
Impact: CPB/DHCA and, to a lesser extent, lung region influence pulmonary tissue-level AA metabolite production. Inflammatory mediator AA metabolites have been noted in previous studies to increase following CPB; however, this is the first study to look at pulmonary tissue-level differences following CPB/DHCA. Increases in many AA metabolites, including LOX- and CYP450-derived products, were seen in both upper and lower lobe of piglets following CPB/DHCA. COX-derived prostaglandin metabolites were increased not only in CPB upper and lower lobe but also in mechanically ventilated control lower lobe, suggesting an additional, separate mechanism from CPB/DCHA.
(© 2022. The Author(s), under exclusive licence to the International Pediatric Research Foundation, Inc.)
Databáze: MEDLINE
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