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Expansion of Canine Bone Marrow-Derived Endothelial Progenitor Cells and Dynamic Observation

  • Basic Science Research
  • Published:
Annals of Vascular Surgery

Abstract

We cultured bone marrow-derived endothelial progenitor cells by a simple ex vivo expansion method and observed the expansion efficacy. Bone marrow mononuclear cells from five mongrel adult dogs were cultured with EGM-2MV medium in culture flasks coated with fibronectin. Morphology was observed with phase contrast microscopy, and a growth curve was constructed to evaluate the efficacy of expansion. Incorporation of Dil-ac-LDL was tested to evaluate the function. At different time points, immunocytochemical staining for flk-1, CD133, and factor VIII-related antigens was done and compared to staining of endothelial cells and mesenchymal stem cells and percentages of CD133, vascular endothelial growth factor receptor 2 (VEGFR-2), and the double-positive cells measured with flow cytometry to identify the quality and efficacy of expansion. Cluster-like attached cells grew to confluence at an average time of 10 days, and the mean number of cells harvested from 1 mL of bone marrow was (1.3 ± 0.3) × 106. The cells presented a cobblestone-like appearance and took up Dil-ac-LDL. Immunocytochemistry showed that flk-1, CD133, and factor VIII-related antigens were positive. Flow cytometry showed that VEGFR-2 and CD133 double-positive cells augmented 242-fold at the tenth day. Ex vivo expansion can effectively proliferate endothelial progenitor cells from bone marrow; the expansion efficacy could meet the requirements for tissue engineering of blood vessels.

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Acknowledgement

We thank Dr. YeQing Cui for immunocytochemical staining and Dr. XueJing Sun for flow cytometry. We also thank Dr. YanChuan Wu for technical assistance. This work was supported by the Program of Science and Technology Committee of Beijing City under award H020920040330.

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Correspondence to YingFeng Wu MD.

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Wu, Y., Zhang, J., Gu, Y. et al. Expansion of Canine Bone Marrow-Derived Endothelial Progenitor Cells and Dynamic Observation. Ann Vasc Surg 20, 387–394 (2006). https://doi.org/10.1007/s10016-006-9047-6

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  • DOI: https://doi.org/10.1007/s10016-006-9047-6

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