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Can bone marrow-derived multipotent adult progenitor cells regenerate infarcted myocardium?

Abstract：

OBJECTIVES:To assess the functional effects of multipotent adult progenitor cells (MAPCs) transplanted in a rat model of chronic myocardial infarction. METHODS:Forty-four rats underwent coronary ligation and, 14 days later, were randomly allocated to receive in-scar injections (5 x 10(6) cells/150 microL) of green fluorescent protein (eGFP)-transduced allogeneic MAPCs (n = 25) or culture medium (controls, n = 19). Nine of the MAPC-treated hearts were employed for functional studies while the remaining 16 received cells co-labeled with Resovist and were only used for serial histological assessments. Left ventricular (LV) function was assessed echocardiographically before transplantation and 1 month thereafter in a blinded manner. Immunohistochemistry, electron microscopy and PCR were used to detect grafted cells. All data were compared by nonparametric tests. RESULTS:Baseline ejection fractions (EF, median;[interquartile range]) did not differ significantly among the groups: 30% [0.23;0.37] and 37% [0.32;0.38] in control and rMAPC-transplanted hearts, respectively. One month later, LV function of control hearts was found to have deteriorated, as reflected by a decline in EF to 24% [0.21;0.30], and although EF tended to remain more stable after cell transplantation (37% [0.27;0.41]), the difference between the two groups failed to achieve statistical significance (p = 0.06). While MAPCs could be identified early post-transplant, no evidence of engraftment was further observed at 1 month by immunohistochemistry, electron microscopy or PCR. CONCLUSIONS:In this model, MAPCs did not improve global pump function, and although some of these cells expressed endothelial markers during the early post-transplant period, we could not detect any evidence for differentiation into cardiomyocytes and no engraftment was further identified beyond 2 weeks after cell injections.

journal_name

Cardiovasc Res

journal_title

Cardiovascular research

authors

Agbulut O,Mazo M,Bressolle C,Gutierrez M,Azarnoush K,Sabbah L,Niederlander N,Abizanda G,Andreu EJ,Pelacho B,Gavira JJ,Perez-Ilzarbe M,Peyrard S,Bruneval P,Samuel JL,Soriano-Navarro M,García-Verdugo JM,Hagège AA,Próspe

doi

10.1016/j.cardiores.2006.07.009

subject

Has Abstract

pub_date

2006-10-01 00:00:00

pages

175-83

issue

eissn

0008-6363

issn

1755-3245

pii

S0008-6363(06)00317-8

journal_volume

pub_type

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Can bone marrow-derived multipotent adult progenitor cells regenerate infarcted myocardium?