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Cardiovascular Drugs and Therapy

, Volume 22, Issue 5, pp 363–371 | Cite as

Mobilization of Mesenchymal Stem Cells by Granulocyte Colony-stimulating Factor in Rats with Acute Myocardial Infarction

  • Zhaokang Cheng
  • Xiaolei Liu
  • Lailiang Ou
  • Xin Zhou
  • Yi Liu
  • Xiaohua Jia
  • Jin Zhang
  • Yuming Li
  • Deling Kong
Article

Abstract

Purpose

Intravenous delivery of mesenchymal stem cells (MSCs), a noninvasive strategy for myocardial repair after acute myocardial infarction (MI), is limited by the low percentage of MSCs migration to the heart. The purpose of this study was to test whether granulocyte colony-stimulating factor (G-CSF) would enhance the colonization of intravenously infused MSCs in damaged heart in a rat model of acute MI.

Methods

After induction of anterior MI, Sprague–Dawley rats were randomized to receive: (1) saline (n = 9); (2) MSCs (n = 15); and (3) MSCs plus G-CSF (50 μg/kg/day for 5 consecutive days, n = 13).

Results

Flow cytometry revealed that G-CSF slightly increased surface CXCR4 expression on MSCs in vitro. After completion of G-CSF administration, MSCs showed a significantly lower colonization in bone marrow and a trend toward higher localization in the infarcted myocardium. At 3 months, vessel density in the infarct region of heart was significantly increased in MSCs group and trended to increase in MSCs + G-CSF group. However, echocardiographic and hemodynamic parameters, including left ventricular (LV) end-diastolic diameters, ejection fraction, and ±dP/dt max, were not statistically different. Morphological analysis showed that infarct size and collagen content were similar in the three groups. Immunohistochemistry revealed that the combined therapy accelerated endothelial recovery of the blood vessels in the ischemic myocardium. However, myocardial regeneration resulting from MSCs differentiation was not observed.

Conclusions

G-CSF enhanced the migration of systemically delivered MSCs from bone marrow to infarcted heart. However, the beneficial effect of this kind of migration is limited, as cardiac function did not improve.

Key words

Mesenchymal stem cells G-CSF Migration Myocardial infarction 

Notes

Acknowledgements

This work is supported by grants from Natural Science Foundation of Tianjin (05YFJZJC01601 to L.O.) and Natural Science Foundation of China (30570471, 30725030 to D.K., 30500645 to J.Z.).

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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • Zhaokang Cheng
    • 1
  • Xiaolei Liu
    • 1
  • Lailiang Ou
    • 1
  • Xin Zhou
    • 2
  • Yi Liu
    • 1
  • Xiaohua Jia
    • 1
  • Jin Zhang
    • 3
  • Yuming Li
    • 2
  • Deling Kong
    • 1
  1. 1.Key Laboratory of Bioactive Materials of Education of Ministry, College of Life ScienceNankai UniversityTianjinChina
  2. 2.Institute of Cardiovascular Disease, Pingjin HospitalMedical College of Chinese People’s Armed Police ForcesTianjinChina
  3. 3.Department of AnatomyGuangzhou University of Traditional Chinese MedicineGuangzhouChina

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