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Circ J. 2008 Aug;72(8):1351-8.

Granulocyte-colony stimulating factor increases donor mesenchymal stem cells in bone marrow and their mobilization into peripheral circulation but does not repair dystrophic heart after bone marrow transplantation.

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  • 1The Department of Pediatrics, Kansai Medical University, Moriguchi, Japan.

Abstract

BACKGROUND:

Hereditary disordered cardiac muscle could be replaced with intact cardiomyocytes derived from genetically intact bone marrow (BM)-derived stem cells.

METHODS AND RESULTS:

Cardiomyopathic mice with targeted mutation of delta-sarcoglycan gene underwent intra-BM-BM transplantation (IBM-BMT) from transgenic mice expressing green fluorescence protein. The host BM and the peripheral blood were completely reconstituted by donor-derived hematopoietic cells by IBM-BMT. Treatment with granulocyte-colony stimulating factor (G-CSF) markedly increased donor-derived mesenchymal stem cells (MSC) in the BM and their mobilization into the peripheral blood after IBM-BMT. Treatment with isoproterenol (iso) for 7 days caused myocardial damage and left ventricular (LV) dysfunction in the cardiomyopathic mice. Co-treatment with iso and G-CSF increased donor BM cell recruitment to the heart and temporarily improved LV function in the cardiomyopathic mice with or without IBM-BMT. However, the cardiac muscle was not replaced with donor BM-derived cardiomyocytes in the cardiomyopathic mice with or without IBM-BMT, and this was associated with no improvement of LV function of mice aged 20 weeks.

CONCLUSIONS:

These results suggest that G-CSF enhances engraftment of donor MSC in the BM and their mobilization into the peripheral circulation after IBM-BMT but MSC recruited to the heart do not differentiate into cardiomyocytes and do not repair the dystrophic heart.

PMID:
18654025
[PubMed - indexed for MEDLINE]
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