Mesenchymal, but not hematopoietic, stem cells can be mobilized and differentiate into cardiomyocytes after myocardial infarction in mice

Keiichi Fukuda, Jun Fujita

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59 Citations (Scopus)

Abstract

Bone marrow (BM) cells are reported to contribute to the process of regeneration following myocardial infarction. The present study examined two independent clonal studies to determine the origin of bone marrow (BM)-derived cardiomyocytes. First, we transplanted single CD34 -c-kit +Sca-1 +lineage - side population cells (hematopoietic stem cells) from enhanced green fluorescent protein (EGFP)-transgenic mice into lethally irradiated mice, induced myocardial infarction, and treated them with G-CSF to mobilize stem cells. At 8 weeks, we could not find any EGFP + cardiomyocytes. In contrast, more than 5000 EGFP + cardiomyocytes were observed in whole BM cell-transplanted mice, suggesting that they were derived from non-hematopoietic cells. Next, clonally purified mesenchymal stem cells (MSC) that expressed EGFP in the cardiomyocyte-specific manner were transplanted directly into BM of lethally irradiated mice, and similar experiment was performed. EGFP + actinin + cells were observed in the ischemic myocardium, indicating that MSC had been mobilized and differentiated into cardiomyocytes. Together, these results suggest that the origin of the BM-derived cardiomyocytes is MSC.

Original languageEnglish
Pages (from-to)1940-1943
Number of pages4
JournalKidney International
Volume68
Issue number5
DOIs
Publication statusPublished - 2005 Nov

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Hematopoietic Stem Cells
Cardiac Myocytes
Myocardial Infarction
Mesenchymal Stromal Cells
Bone Marrow
Bone Marrow Cells
Side-Population Cells
Actinin
Granulocyte Colony-Stimulating Factor
Transgenic Mice
Regeneration
Myocardium
Stem Cells
enhanced green fluorescent protein

ASJC Scopus subject areas

  • Nephrology

Cite this

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title = "Mesenchymal, but not hematopoietic, stem cells can be mobilized and differentiate into cardiomyocytes after myocardial infarction in mice",
abstract = "Bone marrow (BM) cells are reported to contribute to the process of regeneration following myocardial infarction. The present study examined two independent clonal studies to determine the origin of bone marrow (BM)-derived cardiomyocytes. First, we transplanted single CD34 -c-kit +Sca-1 +lineage - side population cells (hematopoietic stem cells) from enhanced green fluorescent protein (EGFP)-transgenic mice into lethally irradiated mice, induced myocardial infarction, and treated them with G-CSF to mobilize stem cells. At 8 weeks, we could not find any EGFP + cardiomyocytes. In contrast, more than 5000 EGFP + cardiomyocytes were observed in whole BM cell-transplanted mice, suggesting that they were derived from non-hematopoietic cells. Next, clonally purified mesenchymal stem cells (MSC) that expressed EGFP in the cardiomyocyte-specific manner were transplanted directly into BM of lethally irradiated mice, and similar experiment was performed. EGFP + actinin + cells were observed in the ischemic myocardium, indicating that MSC had been mobilized and differentiated into cardiomyocytes. Together, these results suggest that the origin of the BM-derived cardiomyocytes is MSC.",
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AU - Fukuda, Keiichi

AU - Fujita, Jun

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N2 - Bone marrow (BM) cells are reported to contribute to the process of regeneration following myocardial infarction. The present study examined two independent clonal studies to determine the origin of bone marrow (BM)-derived cardiomyocytes. First, we transplanted single CD34 -c-kit +Sca-1 +lineage - side population cells (hematopoietic stem cells) from enhanced green fluorescent protein (EGFP)-transgenic mice into lethally irradiated mice, induced myocardial infarction, and treated them with G-CSF to mobilize stem cells. At 8 weeks, we could not find any EGFP + cardiomyocytes. In contrast, more than 5000 EGFP + cardiomyocytes were observed in whole BM cell-transplanted mice, suggesting that they were derived from non-hematopoietic cells. Next, clonally purified mesenchymal stem cells (MSC) that expressed EGFP in the cardiomyocyte-specific manner were transplanted directly into BM of lethally irradiated mice, and similar experiment was performed. EGFP + actinin + cells were observed in the ischemic myocardium, indicating that MSC had been mobilized and differentiated into cardiomyocytes. Together, these results suggest that the origin of the BM-derived cardiomyocytes is MSC.

AB - Bone marrow (BM) cells are reported to contribute to the process of regeneration following myocardial infarction. The present study examined two independent clonal studies to determine the origin of bone marrow (BM)-derived cardiomyocytes. First, we transplanted single CD34 -c-kit +Sca-1 +lineage - side population cells (hematopoietic stem cells) from enhanced green fluorescent protein (EGFP)-transgenic mice into lethally irradiated mice, induced myocardial infarction, and treated them with G-CSF to mobilize stem cells. At 8 weeks, we could not find any EGFP + cardiomyocytes. In contrast, more than 5000 EGFP + cardiomyocytes were observed in whole BM cell-transplanted mice, suggesting that they were derived from non-hematopoietic cells. Next, clonally purified mesenchymal stem cells (MSC) that expressed EGFP in the cardiomyocyte-specific manner were transplanted directly into BM of lethally irradiated mice, and similar experiment was performed. EGFP + actinin + cells were observed in the ischemic myocardium, indicating that MSC had been mobilized and differentiated into cardiomyocytes. Together, these results suggest that the origin of the BM-derived cardiomyocytes is MSC.

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