Noncultured cell transplantation in an ovine model of right ventricular preparation

Beyond the first 2 months of life, pulmonary artery banding is warranted before two-stage arterial switch operation. The aim of this study was to explore whether myogenic cell transplantation could contribute to right ventricular function during pulmonary artery constriction in an ovine model. Sixte...

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Bibliographic Details
Published in:The Journal of thoracic and cardiovascular surgery 2005-05, Vol.129 (5), p.1119-1127
Main Authors: Borenstein, Nicolas, Jian, Zhou, Fromont, Gaelle, Bruneval, Patrick, Hekmati, Mehrak, Behr, Luc, Laborde, François, Montarras, Didier, Le Bret, Emmanuel
Format: Article
Language:English
Subjects:
Age Factors
Animals
Biological and medical sciences
Biopsy
Cardiac Catheterization
Cardiac Output
Cell Survival
Cell Transplantation - methods
Combined Modality Therapy
Constriction
Disease Models, Animal
Heart Ventricles
Injections, Intramuscular
Male
Medical sciences
Myocardial Contraction
Myocardium
Pulmonary Artery - surgery
Pulmonary Wedge Pressure
Random Allocation
Satellite Cells, Skeletal Muscle - transplantation
Sheep
Stroke Volume
Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases
Surgery of the heart
Transplantation, Autologous
Transposition of Great Vessels - physiopathology
Transposition of Great Vessels - surgery
Treatment Outcome
Ventricular Function, Right
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Summary:Beyond the first 2 months of life, pulmonary artery banding is warranted before two-stage arterial switch operation. The aim of this study was to explore whether myogenic cell transplantation could contribute to right ventricular function during pulmonary artery constriction in an ovine model. Sixteen rams were assigned to one of the following groups: group 1, simple pulmonary artery banding (n = 5); group 2, pulmonary artery banding and cell implantation in the right ventricle (n = 7); and group 3, pulmonary artery banding and placebo injection in the right ventricle (n = 4). Hemodynamic assessment with pressure-volume loops was performed on days 0 and 60. The pulmonary artery banding and the injections were achieved through a left fourth intercostal thoracotomy. Autologous myogenic cell implantation was carried out with a noncultured cell preparation, as previously described by our group. Implanted sites were processed with monoclonal antibodies to a fast skeletal-specific isoform of myosin heavy chain (MY32). Skeletal myosin heavy chain expression was detected at 2 months after noncultured cell implantation in all grafted animals. Right ventricular training resulted in statistically significant increased signs of contractility in all three groups. There was no observed difference, however, between the cell therapy group and the other two groups with respect to signs of cardiac function. Successful engraftment of noncultured cells into right ventricular myocardium did not translate into a functional benefit that we could demonstrate in our ovine model. Cellular therapy thus is probably not useful to strengthen a left ventricle being retrained through pulmonary artery banding before arterial switch operation. However, cell transplantation may affect the outcome of right ventricular failure long term after atrial switch operation. Although preliminary, this investigation paves the way for further research into cellular cardiomyoplasty, right ventricular failure, and congenital heart disease.
ISSN:0022-5223
1097-685X
DOI:10.1016/j.jtcvs.2004.09.008