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Stem Cell Usage

The impact of post-thaw colony-forming units-granulocyte/macrophage on engraftment following unrelated cord blood transplantation in pediatric recipients

Bone Marrow Transplantation volume 39, pages 515–521 (2007)Cite this article

Abstract

We retrospectively reviewed the engraftment kinetics following unrelated cord blood transplantation (CBT) in association with the post-thaw colony-forming units-granulocyte/macrophage (CFU-GM) number along with the numbers of total nucleated cells (TNC), CD34+ cells and CD3+ cells. A total of 71 cord blood units prepared for 53 patients (double-unit CBT in 18 patients) were evaluated. Either the number of infused CFU-GM or CD34+ cells was significantly lower in patients who failed to achieve engraftment (P=0.028 and 0.005, respectively). Post-thaw CFU-GM, TNC and CD34+ cells correlated with the speed of neutrophil engraftment (P=0.004, 0.037 and 0.004, respectively), whereas only CFU-GM showed a significant correlation with platelet engraftment (r=−0.385, P=0.024). In double-unit transplants, the number of CFU-GM was the only significant factor predicting engraftment of the predominating unit (P=0.006). We conclude that the post-thaw CFU-GM number is a reliable predictor of rapid engraftment after CBT as well as of the predominating unit in double-unit transplants. Thus, it would be important to perform post-thaw CFU-GM assay on cryopreserved aliquots from several candidate cord blood units in advance before CBT to avoid selecting the unit that might possess a low clonogenic potential.

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Acknowledgements

We thank resident physicians and nurses for their hard work, compassion and diligence in caring for the patients.

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Authors and Affiliations

  1. Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea

    K H Yoo, S H Lee, K W Sung, H L Jung, E J Cho & H H Koo

  2. Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea

    H-J Kim

  3. Cancer Center, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea

    H K Park & H A Kim

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  1. K H Yoo
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Correspondence to H H Koo.

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Yoo, K., Lee, S., Kim, HJ. et al. The impact of post-thaw colony-forming units-granulocyte/macrophage on engraftment following unrelated cord blood transplantation in pediatric recipients. Bone Marrow Transplant 39, 515–521 (2007). https://doi.org/10.1038/sj.bmt.1705629

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