Ina Willenberg1, Katharina Rund1, Song Rong2,3, Nelli Shushakova2,4, Faikah Gueler2,4, Nils Helge Schebb5,6. 1. Institute for Food Toxicology and Analytical Chemistry, University of Veterinary Medicine Hannover, Bischofsholer Damm 15, 30173, Hannover, Germany. 2. Department of Nephrology, Hannover Medical School, Hannover, Germany. 3. The Transplantation Center of the Affiliated Hospital, Zunyi Medical College, Zunyi, China. 4. Phenos GmbH, Hannover, Germany. 5. Institute for Food Toxicology and Analytical Chemistry, University of Veterinary Medicine Hannover, Bischofsholer Damm 15, 30173, Hannover, Germany. schebb@wwu.de. 6. Institute of Food Chemistry, University of Wuppertal, Wuppertal, Germany. schebb@wwu.de.
Abstract
OBJECTIVE: The present study aimed to comprehensively investigate the changes in oxylipins during murine sepsis induced by lipopolysaccharide (LPS) or cecal ligation and puncture (CLP). METHODS: Twenty-four hours after induction of sepsis in male C57BL/6 mice by LPS or CLP, plasma and liver, lung, kidney and heart tissues were sampled. Oxylipin levels in plasma and tissue were quantified by means of LC-MS. Moreover, clinical chemistry parameters were determined in plasma and interleukin levels (MCP-1 and IL-6) were determined in kidney and liver. RESULTS: Elevation of liver function plasma parameters at 24 h revealed that both models were successful in the induction of sepsis. LPS induced sepsis resulted in a dramatic increase of plasma PGE2 (2,100% change in comparison to control) and other cyclooxygenase metabolites, whereas this effect was less pronounced in CLP induced sepsis (97% increase of PGE2). Plasma epoxy-fatty acids (FAs) and hydroxy-FAs and most of the dihydroxy-FAs were elevated in both models of sepsis. Changes of tissue oxylipin concentrations were organ dependent. Only few changes were detected in the lung and liver tissue, epoxy-FAs were elevated in the kidney. In the heart tissue a trend towards lower levels of hydroxy-FAs and epoxy-FAs was observed. CONCLUSION: Both murine models of sepsis are characterized by changes of oxylipins formed in all branches of the arachidonic acid (AA) cascade. The more pronounced effects in the LPS model make this model more suitable for the investigation of the AA cascade and its pharmacological modulation in sepsis.
OBJECTIVE: The present study aimed to comprehensively investigate the changes in oxylipins during murinesepsis induced by lipopolysaccharide (LPS) or cecal ligation and puncture (CLP). METHODS: Twenty-four hours after induction of sepsis in male C57BL/6 mice by LPS or CLP, plasma and liver, lung, kidney and heart tissues were sampled. Oxylipin levels in plasma and tissue were quantified by means of LC-MS. Moreover, clinical chemistry parameters were determined in plasma and interleukin levels (MCP-1 and IL-6) were determined in kidney and liver. RESULTS: Elevation of liver function plasma parameters at 24 h revealed that both models were successful in the induction of sepsis. LPS induced sepsis resulted in a dramatic increase of plasma PGE2 (2,100% change in comparison to control) and other cyclooxygenase metabolites, whereas this effect was less pronounced in CLP induced sepsis (97% increase of PGE2). Plasma epoxy-fatty acids (FAs) and hydroxy-FAs and most of the dihydroxy-FAs were elevated in both models of sepsis. Changes of tissue oxylipin concentrations were organ dependent. Only few changes were detected in the lung and liver tissue, epoxy-FAs were elevated in the kidney. In the heart tissue a trend towards lower levels of hydroxy-FAs and epoxy-FAs was observed. CONCLUSION: Both murine models of sepsis are characterized by changes of oxylipins formed in all branches of the arachidonic acid (AA) cascade. The more pronounced effects in the LPS model make this model more suitable for the investigation of the AA cascade and its pharmacological modulation in sepsis.
Entities:
Keywords:
Cecal ligation and puncture; Lipid mediators; Lipopolysaccharide (LPS); Sepsis
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