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Direct intramyocardial but not intracoronary injection of bone marrow cells induces ventricular arrhythmias in a rat chronic ischemic heart failure model.
- Source :
-
Circulation [Circulation] 2007 May 01; Vol. 115 (17), pp. 2254-61. Date of Electronic Publication: 2007 Apr 16. - Publication Year :
- 2007
-
Abstract
- Background: Therapeutic efficacy of bone marrow (BM) cell injection for treating ischemic chronic heart failure has not been established. In addition, experimental data are lacking on arrhythmia occurrence after BM cell injection. We hypothesized that therapeutic efficacy and arrhythmia occurrence induced by BM cell injection may be affected by the cell delivery route.<br />Methods and Results: Three weeks after left coronary artery ligation, wild-type female rats were injected with 1x10(7) mononuclear BM cells derived from green fluorescent protein-transgenic male rats through either a direct intramyocardial or a retrograde intracoronary route. Both intramyocardial and intracoronary injection of BM cells demonstrated similar improvement in left ventricular ejection fraction measured by echocardiography and a similar graft size analyzed by real-time polymerase chain reaction for the Y chromosome-specific Sry gene. Noticeably, intramyocardial injection of BM cells induced frequent ventricular premature contractions (108+/-73 per hour at 7 days after BM cell injection), including multiform, consecutive ventricular premature contractions and ventricular tachycardia for the initial 14 days; intracoronary injection of BM cells and intramyocardial injection of phosphate-buffered saline rarely induced arrhythmias. Immunohistochemistry demonstrated that intramyocardial BM cell injection formed distinct cell clusters containing donor-derived cells and accumulated host-derived inflammatory cells in the infarct border zone, whereas intracoronary BM cell injection provided more homogeneous donor cell dissemination with less inflammation and without disrupting the native myocardial structure.<br />Conclusions: BM cell injection is able to improve cardiac function in ischemic chronic heart failure but has a risk of arrhythmia occurrence when the intramyocardial route is used. Such arrhythmias may be prevented by using the intracoronary route.
- Subjects :
- Animals
Animals, Genetically Modified
Chronic Disease
Disease Models, Animal
Female
Graft Survival
Heart Failure pathology
Injections
Male
Myocardial Ischemia pathology
Myocardium pathology
Rats
Rats, Sprague-Dawley
Tachycardia, Ventricular mortality
Bone Marrow Transplantation adverse effects
Bone Marrow Transplantation methods
Heart Failure therapy
Myocardial Ischemia therapy
Tachycardia, Ventricular etiology
Subjects
Details
- Language :
- English
- ISSN :
- 1524-4539
- Volume :
- 115
- Issue :
- 17
- Database :
- MEDLINE
- Journal :
- Circulation
- Publication Type :
- Academic Journal
- Accession number :
- 17438152
- Full Text :
- https://doi.org/10.1161/CIRCULATIONAHA.106.662577