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

作者：Tatsumi Kimiko; Otani Hajime^*; Sato Daisuke; Enoki Chiharu; Iwasaka Toshiji; Imamura Hiroji; Taniuchi Shoichiro; Kaneko Kazunari; Adachi Yasushi; Ikehara Susumu

来源：Circulation Journal, 2008, 72(8): 1351-1358.

DOI：10.1253/circj.72.1351

• bone marrow transplantation
• cardiomyopathy
• granulocyte-colony stimulating factor
• mesenchymal stem cells

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 cardionlyopathic 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.

• 出版日期2008-8