Remote ischemic preconditioning (RIPC) modifies plasma proteome in humans

PLoS One. 2012;7(11):e48284. doi: 10.1371/journal.pone.0048284. Epub 2012 Nov 5.

Abstract

Remote Ischemic Preconditioning (RIPC) induced by brief episodes of ischemia of the limb protects against multi-organ damage by ischemia-reperfusion (IR). Although it has been demonstrated that RIPC affects gene expression, the proteomic response to RIPC has not been determined. This study aimed to examine RIPC induced changes in the plasma proteome. Five healthy adult volunteers had 4 cycles of 5 min ischemia alternating with 5 min reperfusion of the forearm. Blood samples were taken from the ipsilateral arm prior to first ischaemia, immediately after each episode of ischemia as well as, at 15 min and 24 h after the last episode of ischemia. Plasma samples from five individuals were analysed using two complementary techniques. Individual samples were analysed using 2Dimensional Difference in gel electrophoresis (2D DIGE) and mass spectrometry (MS). Pooled samples for each of the time-points underwent trypsin digestion and peptides generated were analysed in triplicate using Liquid Chromatography and MS (LC-MS). Six proteins changed in response to RIPC using 2D DIGE analysis, while 48 proteins were found to be differentially regulated using LC-MS. The proteins of interest were involved in acute phase response signalling, and physiological molecular and cellular functions. The RIPC stimulus modifies the plasma protein content in blood taken from the ischemic arm in a cumulative fashion and evokes a proteomic response in peripheral blood.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Blood Proteins / chemistry
  • Blood Proteins / metabolism*
  • Chromatography, Liquid
  • Down-Regulation
  • Electrophoresis, Gel, Two-Dimensional
  • Humans
  • Ischemic Preconditioning*
  • Male
  • Mass Spectrometry
  • Peptides / blood
  • Proteome / chemistry
  • Proteome / metabolism*
  • Proteomics
  • Up-Regulation

Substances

  • Blood Proteins
  • Peptides
  • Proteome

Grants and funding

This project was funded by the National Health and Medical Research Council (NHMRC) grant (# 628756) and NHMRC postgraduate scholarship (# 1017734). Yves d’Udekem is a Career Development Fellow of The National Heart Foundation of Australia (CR 10M 5339). This study was supported by the Victorian Government’s Operational Infrastructure Support Program. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.