Prostacyclin improves transcoronary myocardial delivery of adipose tissue-derived stromal cells.
OBJECTIVE
Heart transplantation of adipose tissue-derived stromal cells (ADSCs) is under evaluation as a therapy for cardiac repair. Prostacyclin (PGI2), a vasodilator with additional effects on platelet aggregation and blood cell adhesion, exerts cardioprotection and might favour the myocardial delivery of ADSCs. We investigated the engraftment and influence on cardiac function of the transcoronary delivery of ADSCs and the effects of PGI2 compared with nitroglycerin (NTG) and adenosine (Ado) in isolated-perfused mouse hearts.


RESULTS
Infusion of ADSCs at <1 x 10(6) cells/mL caused no significant changes in contractility and rhythm, whereas higher cell doses caused cardiac dysfunction. Perfusion with PGI2, NTG, and Ado concentration-dependently increased coronary flow (CF). Perfusion with PGI2, at variance from NTG and Ado, increased ADSC delivery and entrance into the myocardial interstitium without affecting ventricular or metabolic functions and CF (engrafted ADSCs, as percentage of control, at doses producing 50% of maximum vasodilation: PGI2: 220+/-12, P < 0.001; NTG: 110+/-8, P = N.S.; Ado: 80+/-5, P = N.S.).


CONCLUSIONS
PGI2 safely increases myocardial delivery of ADSCs, by mechanisms independent of its vasodilatory properties, with a potential for its use in cell therapy for cardiac repair.
Madonna
Rosalinda
R
Institute and Postgraduate School of Cardiology, G d'Annunzio University-Chieti-Ospedale San Camillo de Lellis, Via C Forlanini, 50, 66100 Chieti, Italy.
Rinaldi
Lucia
L
Rossi
Cosmo
C
Geng
Yong-Jian
YJ
De Caterina
Raffaele
R
D000273:Adipose Tissue / Q000166:cytology / Q000637:transplantation*; D000818:Animals; D003326:Coronary Circulation / Q000187:drug effects; D011464:Epoprostenol / Q000627:therapeutic use*; D005697:Galactosides / Q000378:metabolism; D051379:Mice; D008807:Mice, Inbred BALB C; D009206:Myocardium / Q000378:metabolism; D009569:Nitric Oxide / Q000096:biosynthesis; D010975:Platelet Aggregation Inhibitors / Q000627:therapeutic use*; D017154:Stromal Cells / Q000637:transplantation*; D019210:Troponin I / Q000378:metabolism; D014665:Vasodilator Agents / Q000494:pharmacology
D005697:Galactosides; D010975:Platelet Aggregation Inhibitors; D019210:Troponin I; D014665:Vasodilator Agents; C007816:beta-galactoside; D009569:Nitric Oxide; D011464:Epoprostenol