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The effect of granulocyte colony stimulating factor on regional and global myocardial function in the porcine infarct model
- Source :
-
International Journal of Cardiology . Mar2007, Vol. 116 Issue 2, p225-230. 6p. - Publication Year :
- 2007
-
Abstract
- Abstract: Background: Stem cell therapy has been shown to attenuate the reduction of left ventricular function following myocardial infarction. Most studies have utilized either a direct injection or intra-coronary infusion of cells, but cytokine mobilization of stem cells in the murine model of acute myocardial infarction has been reported to induce similar improvement in cardiac function. Methods: An antero-apical infarction was induced in swine by balloon occlusion, followed by the daily administration of granulocyte colony stimulating factor (G-CSF) or placebo for 5 days. We used left ventricular angiograms and 2D echocardiograms to assess global function, and 3D echocardiograms to assess regional function prior to infarction, immediately following infarction, and at 8 weeks. Histologic evaluation was performed after sacrifice at 8 weeks. Results: There was no significant difference in early or late post-infarction left ventricular ejection fraction or in myocardial histology between the two groups. Following G-CSF therapy, however, 3D echocardiography demonstrated that the regional ejection fractions of the infarcted segments showed a 50.3% improvement in the G-CSF pigs compared to a 7.4% deterioration in the untreated pigs (p =0.005). Conclusions: Global left ventricular ejection fraction remained unchanged, and there is no histologic evidence for infarct attenuation following G-CSF infusion in the porcine infarct–reperfusion model. There was recovery of regional function in the infarcted segment in the G-CSF pigs. These data suggest that bone marrow mobilization in larger species has limited potential as a therapy designed to replace infarcted myocardium or to improve overall cardiac function, although further studies are needed to examine regional effect in the infarct area. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 01675273
- Volume :
- 116
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- International Journal of Cardiology
- Publication Type :
- Academic Journal
- Accession number :
- 24138675
- Full Text :
- https://doi.org/10.1016/j.ijcard.2006.03.050