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Reperfusion Therapy with Low-Dose Insulin or Insulin-Like Growth Factor 2; Myocardial Function and Infarct Size in a Porcine Model of Ischaemia and Reperfusion.
MedLine Citation:
PMID:  24751184     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
In an open-chest porcine model, we examined whether myocardial pharmacological conditioning at the time of reperfusion with low-dose insulin or insulin-like growth factor 2 (IGF2), not affecting serum glucose levels, could reduce infarct size and improve functional recovery. Two groups of anaesthetized pigs with either 60 or 40 min. of left anterior descending artery occlusion (total n=42) were randomized to receive either 0.9% saline-, insulin- or IGF2 infusion for 15 min., starting 5 min. before a 180-min. reperfusion period. Repeated fluorescent microsphere injections were used to confirm ischaemia and reperfusion. Area at risk and infarct size was determined with Evans Blue and triphenyltetrazolium chloride staining. Local myocardial function was evaluated with multilayer radial tissue Doppler strain and speckle-tracking strain from epicardial echocardiography. Western blotting and TUNEL staining were performed to explore apoptosis. Infarct size did not differ between treatment groups and was 56.7±6.8%, 49.7 ± 9.6%, 56.2 ± 8.0% of area at risk for control-, insulin- and IGF2 group, respectively, in the 60-min. occlusion series. Corresponding values were 45.6 ± 6.0%, 48.4 ± 7.2% and 34.1 ± 5.8% after 40-min. occlusion. Global and local cardiac function did not differ between treatment groups. No differences related to treatment could be found in myocardial tissue-cleaved caspase-3 content or the degree of TUNEL staining. Reperfusion therapy with low-dose insulin or with IGF2 neither reduced infarct size nor improved function in reperfused myocardium in this in vivo porcine model. This article is protected by copyright. All rights reserved.
Authors:
Pirjo-Riitta Salminen; Geir Olav Dahle; Christian Arvei Moen; Anita Wergeland; Anne Kristin Jonassen; Rune Haaverstad; Knut Matre; Ketil Grong
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2014-4-19
Journal Detail:
Title:  Basic & clinical pharmacology & toxicology     Volume:  -     ISSN:  1742-7843     ISO Abbreviation:  Basic Clin. Pharmacol. Toxicol.     Publication Date:  2014 Apr 
Date Detail:
Created Date:  2014-4-22     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101208422     Medline TA:  Basic Clin Pharmacol Toxicol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
This article is protected by copyright. All rights reserved.
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