Identical MicroRNAs Regulate Liver Protection during Anaesthetic and Ischemic Preconditioning in Rats: An animal study

PLoS One. 2015 May 14;10(5):e0125866. doi: 10.1371/journal.pone.0125866. eCollection 2015.

Abstract

Anaesthetic preconditioning (APC) and ischemic preconditioning (IPC) ameliorate liver ischemia-reperfusion (I/R) injury and are important for regulating hepatic I/R injury. MicroRNAs (miRNAs) are short, noncoding RNA molecules of 21-23 nucleotides in length, and are currently under intensive investigation regarding their ability to regulate gene expression in a wide range of species. miRNA activity is involved in controlling a wide range of biological functions and processes. We evaluated whether APC and IPC are mediated by the same miRNAs by performing comprehensive miRNA screening experiments in a rat model of hepatic I/R injury. Twenty-one rats were randomly divided into three groups (n = 7/group): control (mock preconditioning), APC, and IPC. Control rats were subjected to 60 min of hepatic ischemia followed by 4 h of reperfusion, whereas the APC and IPC groups were preconditioned with 2% sevoflurane and hepatic ischemia for 10 min prior to ischemia-reperfusion, respectively. Liver samples were collected to measure miRNA levels after 3 h of reperfusion, and gene networks and canonical pathways were identified using Ingenuity Pathway Analysis (IPA). Blood samples were collected to measure the levels of aspartate aminotransferase (AST) and alanine aminotransferase (ALT). Although haemodynamic parameters did not vary among the groups, AST and ALT levels were significantly higher in the control group than in the APC and IPC groups. Comprehensive miRNA screening experiments revealed that most miRNAs altered in the APC group were common to those in the IPC group. IPA identified five miRNAs related to the Akt-glycogen synthase kinase-3β (GSK-3β)-cyclin D1 pathway that were significantly affected by both preconditioning strategies. The application of either APC or IPC to ameliorate hepatic I/R injury results in expression of several common miRNAs that are related to the Akt-GSK-cyclin D1 pathway.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Alanine Transaminase / blood
  • Animals
  • Aspartate Aminotransferases / blood
  • Gene Expression Regulation
  • Gene Regulatory Networks
  • Ischemic Preconditioning* / methods
  • Liver / blood supply*
  • Liver / metabolism
  • Liver / pathology
  • Male
  • MicroRNAs / analysis
  • MicroRNAs / genetics*
  • Rats
  • Rats, Wistar
  • Reperfusion Injury / blood
  • Reperfusion Injury / genetics*
  • Reperfusion Injury / pathology
  • Reperfusion Injury / therapy*

Substances

  • MicroRNAs
  • Aspartate Aminotransferases
  • Alanine Transaminase

Grants and funding

This study was supported by a Grant-in-Aid for Science Research (C) (Project number 24592318) from the Ministry of Education, Culture, Sports, Science, and Technology, Japan, to A.S. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.