Chinese Journal of Tissue Engineering Research ›› 2010, Vol. 14 ›› Issue (6): 957-961.doi: 10.3969/j.issn.1673-8225.2010.06.002

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Proliferation, metabolism, and osteogenic differentiation of mesenchymal stem cells under hypoxia: Cell sources of placenta amniotic versus bone marrow

Chen Ting1, Zhou Yan1, Zhang Zhi-ping2, Tan Wen-song1   

  1. 1Laboratory of Animal Cells and Tissue Engineering, East China University of Science and Technology, Shanghai   200237, China;
    2Maternal and Child Health Care Hospital in Shanghai Pudong New Area, Shanghai   201200, China
  • Online:2010-02-05 Published:2010-02-05
  • Contact: Zhou Yan, Master, Associate professor, Laboratory of Animal Cells and Tissue Engineering, East China University of Science and Technology, Shanghai 200237, China zhouyan@ecust.edu.cn
  • About author:Chen Ting, Studying for doctorate, Laboratory of Animal Cells and Tissue Engineering, East China University of Science and Technology, Shanghai 200237, China shengwu01@163.com
  • Supported by:

    the National Natural Science Foundation of China, No. 20776044*

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Abstract:

BACKGROUND: Effect of hypoxia on osteogenic differentiation of bone marrow mesenchymal stem cells (BMMSCs) has been differently reported. Those differences might cause by varying volume fraction of oxygen and varying source of BMMSCs.

OBJECTIVE: To compare the biological differences between placenta and BMMSCs under hypoxia.

METHODS: Human placenta amniotic mesenchymal stem cells (hAMSCs) and rabbit BMMSCs were isolated by two step proteinases and whole bone marrow adhesion, respectively. hAMSCs and BMMSCs at the same passage were seeded in 12-well plates at an initial cell density of 2 × 104 cells per well with α-MEM containing 10% FBS. Then, the cells were cultured under 5% O2 or 20% O2 for 12 days. hAMSCs and BMMSCs at the same passage were seeded in 12-well plates at an initial cell density of 1 × 105 cells per well with osteogenic medium. Then, the cells were cultured under 5% O2 or 20% O2 for 14 days. Cell growth curve, the specific glucose consumption rates and specific lactate production rates, and osteogenic differentiation were detected.

RESULTS AND CONCLUSION: Compared to normal oxygen, hypoxia promoted the proliferation and osteogenic differentiation of MSCs. When compared to BMMSCs, statistically significant enhancement of the growth of hAMSCs by hypoxia was observed. hAMSCs cultured under hypoxia exhibited lower glucose consumption and lactate production in contrast with BMMSCs. Furthermore, comparison between hAMSCs and BMMSCs showed that the alkaline phosphatase expression of BMMSCs was significantly enhanced by hypoxia and was markedly higher compared with hAMSCs. The amount of calcium deposition was also enhanced by hypoxia, but there were no statistically significant differences between hAMSCs and BMMSCs.

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