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Updated: May 9, 2026

Remote Limb Ischemic Preconditioning: A Neuroprotective Technique in Rodents
07:52

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Published on: June 2, 2015

Remote ischaemic preconditioning involves signalling through the SDF-1α/CXCR4 signalling axis.

Sean M Davidson1, Pradeep Selvaraj, David He

  • 1The Hatter Cardiovascular Institute, University College London, 67 Chenies Mews, London, WC1E 6HX, UK.

Basic Research in Cardiology
|August 7, 2013
PubMed
Summary

Remote ischaemic conditioning (RIC) protects the heart by releasing stromal cell-derived factor-1 (SDF-1α). This protective effect, mediated by the CXCR4 receptor, is crucial for reducing infarct size after heart injury.

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Last Updated: May 9, 2026

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Area of Science:

  • Cardiovascular Science
  • Molecular Biology
  • Regenerative Medicine

Background:

  • Ischaemic preconditioning is a potent method to reduce infarct size.
  • Remote ischaemic conditioning (RIC) offers cardioprotection via an unknown humoral factor.
  • Stromal cell-derived factor-1 (SDF-1α) is a potential cardioprotective chemokine.

Purpose of the Study:

  • To investigate the role of SDF-1α in RIC-induced cardioprotection.
  • To determine if SDF-1α mediates infarct size reduction and functional recovery after RIC.
  • To identify the molecular mechanism underlying RIC.

Main Methods:

  • RIC was induced in rats, and plasma SDF-1α levels were measured.
  • The effect of RIC on infarct size and cardiac function was assessed.
  • AMD3100, a CXCR4 inhibitor, was used to block SDF-1α signaling.
  • Direct administration of SDF-1α was tested for cardioprotective effects.

Main Results:

  • RIC significantly increased plasma SDF-1α levels.
  • RIC reduced infarct size by 53% to 27%, which was blocked by AMD3100.
  • RIC improved cardiac papillary muscle function, an effect abolished by AMD3100.
  • Direct SDF-1α administration showed protective effects, blocked by AMD3100.

Conclusions:

  • RIC stimulates the release of SDF-1α.
  • SDF-1α, acting via CXCR4, is essential for RIC-mediated cardioprotection.
  • This 10-kDa peptide is a key mediator in the mechanism of RIC.