Effect of transplantation of bone marrow stem cells on myocardial infarction size in a rabbit model

doi:10.5847/wjem.j.issn.1920-8642.2013.04.012

Abstract

Abstract:

BACKGROUND: Intravenous transplantation has been regarded as a most safe method in stem cell therapies. There is evidence showing the homing of bone marrow stem cells (BMSCs) into the injured sites, and thus these cells can be used in the treatment of acute myocardial infarction (MI). This study aimed to investigate the effect of intravenous and epicardial transplantion of BMSCs on myocardial infarction size in a rabbit model.
METHODS: A total of 60 New Zealand rabbits were randomly divided into three groups: control group, epicardium group (group I) and ear vein group (group II). The BMSCs were collected from the tibial plateau in group I and group II, cultured and labeled. In the three groups, rabbits underwent thoracotomy and ligation of the middle left anterior descending artery. The elevation of ST segment >0.2 mV lasting for 30 minutes on the lead II and III of electrocardiogram suggested successful introduction of myocardial infarction. Two weeks after myocardial infarction, rabbits in group I were treated with autogenous BMSCs at the infarct region and those in group II received intravenous transplantation of BMSCs. In the control group, rabbits were treated with PBS following thoracotomy. Four weeks after myocardial infarction, the heart was collected from all rabbits and the infarct size was calculated. The heart was cut into sections followed by HE staining and calculation of infarct size with an image system.
RESULTS: In groups I and II, the infarct size was significantly reduced after transplantation with BMSCs when compared with the control group (P<0.05). However, there was no significant difference in the infarct size between groups I and II (P>0.05).
CONCLUSION: Transplantation of BMSCs has therapeutic effect on MI. Moreover, epicardial and intravenous transplantation of BMSCs has comparable therapeutic efficacy on myocardial infarction.

Key words: Bone marrow stem cells, Acute myocardial infarction, Epicardial transplantation, Intravenous transplantation, Infarct size, Rabbit

Li-li Ji, Xiao-feng Long, Hui Tian, Yu-fei Liu. Effect of transplantation of bone marrow stem cells on myocardial infarction size in a rabbit model[J]. World Journal of Emergency Medicine, 2013, 4(4): 304-310.

Figures/Tables 5

References 23

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Groups	n	Microscopic study	Macroscopic study
I	20	47.22 (36.64-78.04)^*	1.09 (0.66-1.89)^*
II	20	39.54 (32.18-73.98)^*	1.24 (1.17-2.02)^*
Control	20	61.62 (54.89-108.52)	2.08 (1.89-2.92)

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