Details

Autor(en) / Beteiligte

• Potapova, Irina A
• Doronin, Sergey V
• Kelly, Damon J
• Rosen, Amy B
• Schuldt, Adam J. T
• Lu, Zhongju
• Kochupura, Paul V
• Robinson, Richard B
• Rosen, Michael R
• Brink, Peter R
• Gaudette, Glenn R
• Cohen, Ira S

Titel

Enhanced recovery of mechanical function in the canine heart by seeding an extracellular matrix patch with mesenchymal stem cells committed to a cardiac lineage

Ist Teil von

• American journal of physiology. Heart and circulatory physiology, 2008-12, Vol.295 (6), p.H2257-H2263

Ort / Verlag

United States: American Physiological Society

Erscheinungsjahr

2008

Quelle

MEDLINE

Beschreibungen/Notizen

• 1 Department of Physiology and Biophysics, 2 Institute of Molecular Cardiology, 3 Department of Biomedical Engineering, and 4 Department of Surgery, Stony Brook University, New York; 5 Center for Molecular Therapeutics and Departments of Pharmacology and 6 Pediatrics, Columbia University, New York, New York; and 7 Department of Biomedical Engineering, Worcester Polytechnic Institute, Worcester, Massachusetts Submitted 1 March 2008 ; accepted in final form 30 September 2008 The need to regenerate tissue is paramount, especially for the heart that lacks the ability to regenerate after injury. The urinary bladder extracellular matrix (ECM), when used to repair a right ventricular defect, successfully regenerated some mechanical function. The objective of the current study was to determine whether the regenerative effect of ECM could be improved by seeding the patch with human mesenchymal stem cells (hMSCs) enhanced to differentiate down a cardiac linage. hMSCs were used to form three-dimensional spheroids. The expression of cardiac proteins was determined in cells exposed to the spheroid formation and compared with nonmanipulated hMSCs. To determine whether functional calcium channels were present, the cells were patch clamped. To evaluate the ability of these cells to regenerate mechanical function, the spheroids were seeded on ECM and then implanted into the canine heart to repair a full-thickness right ventricular defect. As a result, many of the cells spreading from the spheroids expressed cardiac-specific proteins, including sarcomeric -actinin, cardiotin, and atrial natriuretic peptide, as well as the cell cycle markers cyclin D1 and proliferating cell nuclear antigen. A calcium current similar in amplitude to that of ventricular myocytes was present in 16% of the cells. The cardiogenic cell-seeded scaffolds increased the regional mechanical function in the canine heart compared with the unmanipulated hMSC-seeded scaffolds. In addition, the cells prelabeled with fluorescent markers demonstrated myocyte-specific actinin staining with sarcomere spacing similar to that of normal myocytes. In conclusion, the spheroid-derived cells express cardiac-specific proteins and demonstrate a calcium current similar to adult ventricular myocytes. When these cells are implanted into the canine heart, some of these cells appear striated and mechanical function is improved compared with the unmanipulated hMSCs. Further investigation will be required to determine whether the increased mechanical function is due to a differentiation of the cardiogenic cells to myocytes or to other effects. human mesenchymal stem cells; myocyte structure; cardiac contractile function; myogenesis; cardiac regeneration; myocardium; heart failure Address for reprint requests and other correspondence: G. R. Gaudette, Dept. of Biomedical Engineering, Worcester Polytechnic Institute, 100 Institute Rd., Worcester, MA 01609 (e-mail: gaudette{at}wpi.edu )