Journal Article

Circulating microRNAs Reveal Time Course of Organ Injury in a Porcine Model of Acetaminophen-Induced Acute Liver Failure

Palacios Jimenez, Carolina, Andreola, Fausto, Baker, Luisa A., Leckie, Pamela J., Jalan, Rajiv, Lee, Karla C. L., Mookerjee, Rajeshwar P., Chang, Yu-Mei, Davies, Nathan A., Alibhai, Hatim

2015

Overview

Acute liver failure is a rare but catastrophic condition which can progress rapidly to multi-organ failure. Studies investigating the onset of individual organ injury such as the liver, kidneys and brain during the evolution of acute liver failure, are lacking. MicroRNAs are short, non-coding strands of RNA that are released into the circulation following tissue injury. In this study, we have characterised the release of both global microRNA and specific microRNA species into the plasma using a porcine model of acetaminophen-induced acute liver failure. Pigs were induced to acute liver failure with oral acetaminophen over 19h±2h and death occurred 13h±3h thereafter. Global microRNA concentrations increased 4h prior to acute liver failure in plasma (P<0.0001) but not in isolated exosomes, and were associated with increasing plasma levels of the damage-associated molecular pattern molecule, genomic DNA (P<0.0001). MiR122 increased around the time of onset of acute liver failure (P<0.0001) and was associated with increasing international normalised ratio (P<0.0001). MiR192 increased 8h after acute liver failure (P<0.0001) and was associated with increasing creatinine (P<0.0001). The increase in miR124-1 occurred concurrent with the pre-terminal increase in intracranial pressure (P<0.0001) and was associated with decreasing cerebral perfusion pressure (P<0.002). Conclusions: MicroRNAs were released passively into the circulation in response to acetaminophen-induced cellular damage. A significant increase in global microRNA was detectable prior to significant increases in miR122, miR192 and miR124-1, which were associated with clinical evidence of liver, kidney and brain injury respectively.

• Publisher: Public Library of Science,Public Library of Science (PLoS)
• Subject: Acetaminophen / Acetaminophen - adverse effects / Analgesics / Analysis / Animals / Biomarkers / Brain / Brain injury / Catastrophic failure analysis / Chemical and Drug Induced Liver Injury - blood / Coding / Complications and side effects / Creatinine / Damage detection / Damage patterns / Deoxyribonucleic acid / Diagnosis / Disease / Disease Models, Animal / DNA / Dosage and administration / Exosomes / Failure / Genetic aspects / Head injuries / Hospitals / Intracranial pressure / Intracranial Pressure - drug effects / Kidneys / Liver / Liver diseases / Liver failure / Liver Failure, Acute - blood / Liver Failure, Acute - chemically induced / Medical prognosis / Medical schools / MicroRNA / MicroRNAs / MicroRNAs - blood / miRNA / Non-coding RNA / Perfusion / Physiological aspects / Plasma / Plasma levels / Pressure / Ribonucleic acid / RNA / Rodents / Science / Studies / Swine / Traumatic brain injury / Veterinary colleges