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[Mobilization of stem cells by granulocyte colony-stimulating factor for the regeneration of myocardial tissue after myocardial infarction]

F Kuethe, H R Figulla, M Voth, B M Richartz, T Opfermann, H G Sayer, A Krack, M Fritzenwanger, K Höffken, D Gottschild, G S Werner
Deutsche Medizinische Wochenschrift 2004 February 27, 129 (9): 424-8
14970913

BACKGROUND AND OBJECTIVE: Animal data suggest that mobilized bone marrow cells (BMC) may contribute to tissue regeneration after myocardial infarction (MI). However the safety, feasibility and efficacy of treatment with granulocyte colony-stimulating factor (G-CSF) to mobilize BMC after acute myocardial infarction in patients is unknown. We analysed cardiac function and perfusion in 5 patients who were treated with G-CSF in addition to standard therapeutical regimen.

METHODS AND RESULTS: 48 h after successful recanalization and stent implantation in 5 patients with acute MI, the patients received 10 micro g/kg bodyweight/day G-CSF subcutaneously for a mean treatment duration of 7.6+/-0.5 days. Peak value of CD34 (+) cells, a multipotent subfraction of bone marrow cells, was reached after 5.0+/-0.7 days. After 3 months of follow-up global left ventricular ejection fraction (determined by radionuclid-ventriculography) increased significantly from 42.2+/-6.6 % to 51.6+/-8.3 % (P<0.05). The wall motion score and the wall perfusion score (determined by ECG gated SPECT) decreased from 13.5+/-3.6 to 9.9+/-3.5 (P<0.05) and from 9.6+/-2.9 to 7.0+/-4.5 (P<0.05), respectively, indicating a significant improvement of myocardial function and perfusion. No severe side effects of G-CSF treatment could be observed. Malignant arrhythmias were not observed either.

CONCLUSION: In patients with acute MI, treatment with G-CSF to mobilize BMC appears to be well tolerable under clinical conditions. Improved cardiac function and perfusion may be attributed to BMC-associated promotion of myocardial regeneration and neovascularization.

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