Chinese Journal of Tissue Engineering Research ›› 2024, Vol. 28 ›› Issue (15): 2346-2350.doi: 10.12307/2024.409

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Effects of nano-zirconium dioxide on osteogenic differentiation of ectomesenchymal stem cells in nasal mucosa

Bian Lu1, Xia Dandan2, Qian Yuan2, Shi Wen1, Que Yunduan1, Lyu Long1, Xu Aihua1, Shi Wentao1   

  1. 1Central Laboratory of Gaochun Hospital Affiliated to Jiangsu University, Nanjing 211300, Jiangsu Province, China; 2Department of Orthopedics, Affiliated Hospital of Jiangnan University, Nanjing 211300, Jiangsu Province, China
  • Received:2023-06-06 Accepted:2023-08-04 Online:2024-05-28 Published:2023-09-19
  • Contact: Shi Wentao, Attending physician, Central Laboratory of Gaochun Hospital Affiliated to Jiangsu University, Nanjing 211300, Jiangsu Province, China
  • About author:Bian Lu, Master candidate, Central Laboratory of Gaochun Hospital Affiliated to Jiangsu University, Nanjing 211300, Jiangsu Province, China
  • Supported by:
    Special Fund Project of Nanjing Health Science and Technology Development, No. ZKX21063 (to QYD, SWT); Special Fund Project of Nanjing Health Science and Technology Development, No. YKK19129 (to SWT)

Abstract: BACKGROUND: Nano-zirconium dioxide has good application potential in the field of bone tissue repair. Studying the effect of nano-zirconium dioxide on osteogenic differentiation will help to promote the clinical application of nano-zirconium dioxide in the treatment of bone defects.  
OBJECTIVE: To explore the effect of nano-zirconium dioxide on the osteogenic differentiation of ectomesenchymal stem cells in the nasal mucosa.
METHODS: Ectomesenchymal stem cells derived from rat nasal mucosa were isolated and cultured, and the biotoxicity of nano-zirconium dioxide to the cells was detected by CCK-8 assay. The biosafety concentration was selected according to the cytotoxicity, and the cells were randomly divided into a control group, a nano-zirconium dioxide group, and a nano-hydroxyapatite group. Osteogenic differentiation of cells was directionally induced in each group. On day 7 of induced differentiation, alkaline phosphatase staining was performed. qRT-PCR and western blot assay were used to detect the expression of early osteogenic markers (Runx2 and Osx). On day 21 of induced differentiation, alizarin red staining was conducted. qRT-PCR and western blot assay were utilized to determine the expression levels of late osteogenic markers (OPN and OCN). 
RESULTS AND CONCLUSION: (1) The median lethal concentration of nano-zirconium dioxide on ectomesenchymal stem cells in nasal mucosa was 0.6 mg/mL. In the experiment, the mass concentration of 200 μg/mL was selected for intervention. Zirconium dioxide had no significant effect on the proliferation of the cells. (2) Compared with the control group, the alkaline phosphatase staining of the cells in the nano-zirconium dioxide group was more obvious and the level of cell mineralization was higher, but there was no significant difference compared with the nano-hydroxyapatite. (3) Compared with the control group, the expression of bone-related genes and proteins increased significantly, but there was no significant difference compared with nano-hydroxyapatite. (4) The results show that nano-zirconium dioxide has good biological safety and can promote the osteogenic differentiation of ectomesenchymal stem cells in the nasal mucosa. This promoting effect is equivalent to that of nano-hydroxyapatite. 

Key words: nasal mucosa, ectomesenchymal stem cell, zirconium dioxide, hydroxyapatite, osteogenic differentiation

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