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Preconditioning with periodic acceleration (pGz) provides second window of cardioprotection.
MedLine Citation:
PMID:  22789658     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
AIMS: Whole body periodic acceleration (pGz) is achieved with a motorized platform that moves the supine body with repetitive, sinusoidal head to foot motion. This increases pulsatile shear stress to the endothelium thereby activating endothelial nitric oxide synthase (eNOS) to produce increased release of nitric oxide (eNO). The current investigation was undertaken to determine whether or not pGz preconditioning can induce second window of protection (SWOP) cardioprotective affects in an in-vivo rat model of myocardial infarction. MAIN METHODS: Rats received 1, 3 or 7 daily pGz treatments of 60 minutes, or no pGz (CONT). Twenty-four hours after the last pGz treatment, ischemia reperfusion injury was produced by ligation of the left coronary artery (LCA) for 30-minutes followed by 90-minutes of reperfusion. KEY FINDINGS: All pGz preconditioned animals survived 90 minutes. Three and 7days of pGz preconditioning reduced myocardial infarct size by 41 and 38% respectively, with better left ventricular function. Additionally, pGz preconditioning increased eNOS, p-eNOS, Akt and p-Akt, HSP70 and nNOS proteins. L-NAME (NOS inhibitor) or Wortmannin (PI3/Akt inhibitor) 15 minutes prior to LCA ligation abolished pGz's cardioprotective effects. SIGNIFICANCE: pGz preconditioning provides SWOP, with increased survival, infarct size reduction, and improved contractility, in part due to up regulation of HSP70 and the PI3/Akt/eNOS , which last at least 72hrs.
Authors:
Arkady Uryash; Heng Wu; Jorge Bassuk; Paul Kurlansky; Jose A Adams
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-7-9
Journal Detail:
Title:  Life sciences     Volume:  -     ISSN:  1879-0631     ISO Abbreviation:  -     Publication Date:  2012 Jul 
Date Detail:
Created Date:  2012-7-13     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0375521     Medline TA:  Life Sci     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2012. Published by Elsevier Inc.
Affiliation:
Mount Sinai Medical Center.
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