Acetazolamide protects steatotic liver grafts against cold ischemia reperfusion injury.

Abstract

Ischemia reperfusion injury (IRI) is a primary concern in liver transplantation, especially when steatosis is present. Acetazolamide (AZ), a specific carbonic anhydrase (CA) inhibitor, has been suggested to protect against hypoxia. Here, we hypothesized that AZ administration could be efficient to protect fatty livers against cold IRI. Obese Zucker rat livers were preserved in Institut Georges Lopez-1 storage solution for 24 hours at 4°C and ex vivo perfused for 2 hours at 37°C. Alternatively, rats were also treated with intravenous injection of AZ (30 mg/kg) before liver recovery. Liver injury, hepatic function, and vascular resistance were determined. CA II protein levels and CA hydratase activity were assessed as well as other parameters involved in IRI (endothelial nitric oxide synthase, mitogen activated protein kinase family, hypoxic inducible factor 1 alpha, and erythropoietin). We demonstrated that AZ administration efficiently protects the steatotic liver against cold IRI. AZ protection was associated with better function, decreased vascular resistance, and activation of endothelial nitric oxide synthase. This was consistent with an effective mitogen activated protein kinase inactivation. Finally, no effect on the hypoxic inductible factor 1 alpha/erythropoietin pathway was observed. The present study demonstrated that AZ administration is a suitable pharmacological strategy for preserving fatty liver grafts against cold IRI.

• Authors: Mohamed Bejaoui, Eirini Pantazi, Viviana De Luca, Arnau Panisello, Emma Folch-Puy, Anna Serafin, Clemente Capasso, Supuran C T, Joan Rosselló-Catafau
• Journal: The Journal of pharmacology and experimental therapeutics (J Pharmacol Exp Ther) Vol. 355 Issue 2 Pg. 191-8 (Nov 2015) ISSN: 1521-0103 [Electronic] United States
• PMID: 26330538 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: Copyright © 2015 by The American Society for Pharmacology and Experimental Therapeutics.

Chemical References

• Carbonic Anhydrase Inhibitors
• Hif1a protein, rat
• Hypoxia-Inducible Factor 1, alpha Subunit
• Erythropoietin
• Nitric Oxide Synthase Type III
• Extracellular Signal-Regulated MAP Kinases
• JNK Mitogen-Activated Protein Kinases
• Carbonic Anhydrase II
• Acetazolamide

Topics

• Acetazolamide (therapeutic use)
• Animals
• Carbonic Anhydrase II (metabolism)
• Carbonic Anhydrase Inhibitors (therapeutic use)
• Cold Temperature
• Enzyme Activation
• Erythropoietin (metabolism)
• Extracellular Signal-Regulated MAP Kinases (metabolism)
• Fatty Liver (drug therapy, pathology, physiopathology)
• Hypoxia-Inducible Factor 1, alpha Subunit (metabolism)
• JNK Mitogen-Activated Protein Kinases (metabolism)
• Liver (blood supply, drug effects, enzymology)
• Liver Transplantation
• Male
• Nitric Oxide Synthase Type III (metabolism)
• Organ Preservation
• Phosphorylation
• Rats, Zucker
• Reperfusion Injury (pathology, physiopathology, prevention & control)
• Vascular Resistance