Chinese Journal of Tissue Engineering Research ›› 2022, Vol. 26 ›› Issue (24): 3796-3801.doi: 10.12307/2022.556

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Ouabain induces in vitro differentiation of human bone marrow mesenchymal stem cells into osteoblasts

Cui Yinpeng1, Guo Ai2, Ma Lifeng2, Liu Zhenjiang1   

  1. 1Department of Orthopedics, Children’s Hospital, Capital Institute of Pediatrics, Beijing 100020, China; 2Department of Orthopedics, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
  • Received:2020-12-14 Accepted:2021-01-30 Online:2022-08-28 Published:2022-01-22
  • Contact: Liu Zhenjiang, MD, Chief physician, Department of Orthopedics, Children’s Hospital, Capital Institute of Pediatrics, Beijing 100020, China Ma Lifeng, MD, Associate chief physician, Department of Orthopedics, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
  • About author:Cui Yinpeng, Master, Physician, Department of Orthopedics, Children’s Hospital, Capital Institute of Pediatrics, Beijing 100020, China

Abstract:

BACKGROUND: As a ligand of Na+/K+-ATPase, ouabain can be combined with it to regulate cell proliferation and metabolism. Studying the effect of ouabain on the osteogenic differentiation of bone marrow mesenchymal stem cells can provide ideas for the treatment of bone defects and bone diseases.
OBJECTIVE: To explore the effects of different concentrations of Na+/K+-ATPase ligand ouabain on the osteogenic differentiation of human bone marrow mesenchymal stem cells.
METHODS: Human bone marrow mesenchymal stem cells were isolated from fresh bone marrow samples from patients that experienced hip replacement, using the whole bone marrow direct adherence method, as experimental cells for inducing osteogenic differentiation. Before osteoinduction, human bone marrow mesenchymal stem cells were treated in different concentrations of ouabain (10, 100, and 1 000 nmol/L) for 24 hours. The untreated human bone marrow mesenchymal stem cells were used as the control group to induce directly. At 21 days after osteoinduction, alizarin red staining was performed. The proportion area was measured using Image Pro Plus software to compare the differences in the amount of calcified nodules produced in each group. 
RESULTS AND CONCLUSION: Compared with the control group, as human bone marrow mesenchymal stem cells in vitro treated with ouabain in low concentration (10 nmol/L), the number of calcified nodules increased after alizarin red staining and the staining areas were higher than that in the control group (P < 0.05). The number of calcified nodules observed after treatment in the high concentration group (100, 1 000 nmol/L) was reduced, and the measured stained area was smaller than that in the control group (P < 0.05). The higher the concentration, the fewer the calcifiednodules were. It is concluded that the fresh bone marrow form hip arthroplasty can be used as a test material for isolating human bone marrow mesenchymal stem cells. Low concentrations of ouabain promote differentiation of human bone marrow mesenchymal stem cells into osteoblasts, while a high concentration of ouabain showed an inhibitory effect. 

Key words: stem cells, bone marrow, human bone marrow mesenchymal stem cells, ouabain, Na+/K+-ATPase, osteogenic differentiation, artificial hip replacement

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