Document Detail

Long-term evaluation of myoblast seeded patches implanted on infarcted rat hearts.
MedLine Citation:
PMID:  20482708     Owner:  NLM     Status:  MEDLINE    
Cell transplantation presents great potential for treatment of patients with severe heart failure. However, its clinical application was revealed to be more challenging than initially expected in experimental studies. Further investigations need to be undertaken to define the optimal treatment conditions. We previously reported on the epicardial implantation of a bio-engineered construct of skeletal myoblast-seeded polyurethane and its preventive effect on progression toward heart failure. In the present study, we present a long-term evaluation of this functional outcome. Left anterior descending coronary ligation was performed in female Lewis rats. Two weeks later, animals were treated with either epicardial implantation of biograft, acellular scaffold, sham operation, or direct intramyocardial skeletal myoblast injection. Functional assessments were performed with serial echocardiographies every 3 months and end point left ventricle pressure was assessed. Hearts were then harvested for histological examinations. Myocardial infarction induced a slow and progressive reduction in fractional shortening after 3 months. Progression toward heart failure was significantly prevented for up to 6 months after injection of myoblasts and for up to 9 months following biograft implantation. Nevertheless, this effect vanished after 12 months, with immunohistological examinations revealing an absence of the transplanted myoblasts within the scaffold. We demonstrated that tissue therapy is superior to cell therapy for stabilization of heart function. However, beneficial effects are transient.
Marie-Noëlle Giraud; Remy Flueckiger; Stéphane Cook; Erick Ayuni; Matthias Siepe; Thierry Carrel; Hendrik Tevaearai
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-05-07
Journal Detail:
Title:  Artificial organs     Volume:  34     ISSN:  1525-1594     ISO Abbreviation:  Artif Organs     Publication Date:  2010 Jun 
Date Detail:
Created Date:  2010-07-13     Completed Date:  2010-10-18     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7802778     Medline TA:  Artif Organs     Country:  United States    
Other Details:
Languages:  eng     Pagination:  E184-92     Citation Subset:  IM    
Department of Cardiovascular Surgery, Inselspital, Bern University Hospital, Switzerland.
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MeSH Terms
Cells, Cultured
Myoblasts, Skeletal / transplantation*
Myocardial Infarction / therapy*
Myocardium / pathology
Polyurethanes / chemistry
Rats, Inbred Lew
Tissue Scaffolds / chemistry*
Tissue Therapy*
Ventricular Function, Left*
Reg. No./Substance:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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