Limb remote ischemic per-conditioning in combination with post-conditioning reduces brain damage and promotes neuroglobin expression in the rat brain after ischemic stroke

Changhong Ren, Pengcheng Wang, Brian Wang, Ning Li, Weiguang Li, Chenggang Zhang, Kunlin Jin, Xunming Ji

Research output: Contribution to journalArticle

35 Scopus citations

Abstract

Purpose: Limb remote ischemic per-conditioning or post-conditioning has been shown to be neuroprotective after cerebral ischemic stroke. However, the effect of combining remote per-conditioning with post-conditioning on ischemic/reperfusion injury as well as the underlying mechanisms are largely unexplored. Methods: Here, adult male Sprague Dawley rats were subjected to middle cerebral artery occlusion (MCAO). The limb ischemic stimuluswas immediatelyapplied after onset of focal ischemia (per-conditioning), followed by repeated short episodes of remote ischemia 24 hr after reperfusion (post-conditioning). The infarct volume, motor function, and the expression of neuroglobin (Ngb) were measured at different durations after reperfusion. Results:We found that a single episode of limb remote per-conditioning afforded short-term protection, but combining repeated remote post-conditioning during the 14 days after reperfusion significantly ameliorated cerebral ischemia/reperfusion injury. Interestingly, we also found that ischemic per-and post-conditioning significantly increased expression of Ngb, an oxygenbinding globin protein that has been demonstrated to be neuroprotective against stroke, at peri-infarct regions from day 1 to day 14 following ischemia/reperfusion.Conclusion: Our results suggest that the conventional per-conditioning combined with post-conditioning may be used as a novel neuroprotective strategy against ischemia-reperfusion injury, and Ngb seems to be one of the important players in limb remote ischemia-mediated neuroprotection.

Original languageEnglish
Pages (from-to)369-379
Number of pages11
JournalRestorative Neurology and Neuroscience
Volume33
Issue number3
DOIs
StatePublished - 17 Jun 2015

Keywords

  • Ischemia
  • neuroglobin
  • remote conditioning
  • stroke

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