Chinese Journal of Tissue Engineering Research ›› 2014, Vol. 18 ›› Issue (35): 5633-5639.doi: 10.3969/j.issn.2095-4344.2014.35.011

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Inhibitory effect of ulinastatin on osteoclast activation and the relationship of ulinastatin to matrix metalloproteinase-2 and matrix metalloproteinase-9: potential of preventing prosthetic osteolysis

Ru Jiang-ying, Zhao Jian-ning, Guo Ting, Yu Lei, Ding Hao, Jiang Hui   

  1. Nanjing Clinical Medical School Affiliated to the Second Military Medical University of Chinese PLA (Nanjing General Hospital of Nanjing Military Area Command of Chinese PLA), Nanjing 210002, Jiangsu Province, China
  • Revised:2014-07-29 Online:2014-08-27 Published:2014-08-27
  • Contact: Zhao Jian-ning, Professor, Doctoral supervisor, Nanjing Clinical Medical School Affiliated to the Second Military Medical University of Chinese PLA (Nanjing General Hospital of Nanjing Military Area Command of Chinese PLA), Nanjing 210002, Jiangsu Province, China
  • About author:Ru Jiang-ying, Master, Associate chief physician, Nanjing Clinical Medical School Affiliated to the Second Military Medical University of Chinese PLA (Nanjing General Hospital of Nanjing Military Area Command of Chinese PLA), Nanjing 210002, Jiangsu Province, China
  • Supported by:

    the Jiangsu Province Basic Research Program (Natural Science Foundation)-General Project, No. BK2012776

Abstract:

BACKGROUND: It is presumed that urinary trypsin inhibitor could have protective effects on local and systemic tissues and could inhibit osteoclast proliferation and activation under long-term chronic inflammation conditions  and in ischemic and anoxic environment which was induced by prosthetic wear.
OBJECTIVE: To investigate the inhibitory effect of ulinastatin on receptor activator for nuclear factor-κb ligand-induced differentiation, proliferation and osteoclastogenesis of RAW264.7 cells and its effects on matrix metalloproteinase-2, matrix metalloproteinase-9 expression level and activity.
METHODS: Mouse monocyte/macrophage cell line RAW264.7 was treated with different concentrations of urinary trypsin inhibitor (0, 500, 5 000 U/mL) for 24, 48 and 72 hours. Experiments were divided into four groups: the blank group (RAW264.7 cells), receptor activator for nuclear factor-κb ligand-induced group (0 U/mL ulinastatin), 500 U/mL ulinastatin group and 5 000 U/mL ulinastatin group.
RESULTS AND CONCLUSION: (1) MTT results indicated that there was no significant difference on the proliferation of RAW264.7 cells treated with urinary trypsin inhibitor at 0-5 000 U/mL (P > 0.05) (2) Tartrate-resistant acid phosphatase staining results revealed that compared with receptor activator for nuclear factor-κb ligand-induced group, the number of tartrate-resistant acid phosphatase-positive cells was significantly less in the ulinastatin group (P < 0.05), showing a time-dose dependent manner. (3) Immunohistochemisical results found that compared with receptor activator for nuclear factor-κb ligand-induced group, the percentage of matrix metalloproteinase-9-positive cells was apparently lower in the ulinastatin group. (4) Western blot assay results demonstrated that matrix metalloproteinase-9 expression was low in the RAW264.7 cells alone. At 48 hours after addition of receptor activator for nuclear factor-κb ligand, matrix metalloproteinase-9 protein expression was large. At 72 hours after culture in the 5 000 U/mL ulinastatin group, matrix metalloproteinase-9 protein expression was evidently reduced. (5) Gelatin zymography results showed that compared with the receptor activator for nuclear factor-κb ligand-induced group, matrix metalloproteinase-9 expression was significantly lower in the 5 000 U/mL ulinastatin group (P < 0.05). Results suggested that urinary trypsin inhibitor inhibited receptor activator for nuclear factor-κb ligand-induced osteoclastogenesis and diminished matrix metalloproteinase-9 expression and activity.


中国组织工程研究杂志出版内容重点:人工关节;骨植入物;脊柱骨折;内固定;数字化骨科;组织工程


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Key words: trypsin inhibitors, RANK ligand, osteoclasts, matrix metalloproteinase 2, matrix metalloproteinase 9

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