Chinese Journal of Tissue Engineering Research ›› 2013, Vol. 17 ›› Issue (32): 5765-5771.doi: 10.3969/j.issn.2095-4344.2013.32.004

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Human umbilical cord mesenchymal stem cells: Comparison of hematopoiesis supporting capacity before and after cryopreservation

Chang Xiang-ping1, Ma Yan2, Bi Xiao-juan2, Song Li-juan1, Duan Xian-lin1, Jiang Ming1, 2   

  1. 1Second Department of Hematology, the First Affiliated Hospital of Xinjiang Medical University, Institute of Hematology of Xinjiang Uygur Autonomous Region, Urumqi  830054, Xinjiang Uygur Autonomous Region, China
    2Stem Cell Laboratory, Clinical Medicine Research Institute of Xinjiang Medical University, Urumqi  830054, Xinjiang Uygur Autonomous Region, China
  • Received:2013-04-05 Revised:2013-06-01 Online:2013-08-06 Published:2013-08-06
  • Contact: Jiang Ming, Master, Chief physician, Professor, Doctoral supervisor, Second Department of Hematology, the First Affiliated Hospital of Xinjiang Medical University, Institute of Hematology of Xinjiang Uygur Autonomous Region, Urumqi 830054, Xinjiang Uygur Autonomous Region, China; Stem Cell Laboratory, Clinical Medicine Research Institute of the Xinjiang Medical University, Urumqi 830054, Xinjiang Uygur Autonomous Region, China jiangmingyy@126.com
  • About author:Chang Xiang-ping★, Studying for master’s degree, Second Department of Hematology, the First Affiliated Hospital of Xinjiang Medical University, Institute of Hematology of Xinjiang Uygur Autonomous Region, Urumqi 830054, Xinjiang Uygur Autonomous Region, China
  • Supported by:

    Special Fund for Stem Cells in the First Affiliated Hospital of Xinjiang Medical University, No. 2009-GXB-07*

Abstract:

BACKGROUND: Cryopreservation of human umbilical cord mesenchymal stem cells has been a hot research issue currently, but the studies concerning their effects on expansion of hematopoietic stem/progenitor cells after cryopreservation are seldom.
OBJECTIVE: To investigate the effects of human umbilical cord mesenchymal stem cells before and after cryopreservation as feeder layer on expansion of human bone marrow mononuclear cells in vitro.
METHODS: 2.5g/L mitomycin C processed human umbilical cord mesenchymal stem cells and bone marrow mesenchymal stem cells at passage 3 were used as the feeder layer to expand adult allogeneic bone marrow mononuclear cells in culture. Up to day 35, methylcellulose assay was used to detect hematopoietic stem/progenitor cell colony proliferation.
RESULTS AND CONCLUSION: There were no differences in the morphology and size of colonies in the cryopreserved human umbilical cord mesenchymal stem cell group, bone marrow mesenchymal stem cell group and non-cryopreserved human umbilical cord mesenchymal stem cell group. However, these parameter described above were significantly higher in these three groups than the blank control group (P < 0.05). There were fewer colonies in the cryopreserved human umbilical cord mesenchymal stem cell group than the non-cryopreserved human umbilical cord mesenchymal stem cell group (P < 0.05). These findings indicate that human umbilical cord mesenchymal stem cells before and after cryopreservation have the ability as feeder layer on expansion of bone marrow mononuclear cells in vitro similar to bone marrow mesenchymal stem cells. But this ability of human umbilical cord mesenchymal stem cells may decrease after cryopreservation.

Key words: stem cells, umbilical cord/umbilical blood stem cells, human umbilical cord mesenchymal stem cells, cryopreservation, co-culture, hematopoiesis, long-term culture of initiating cells, hematopoietic stem/progenitor cells, hematopoietic colony, amplification, other grants-supported paper, stem cell photographs-containing paper

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