Chinese Journal of Tissue Engineering Research ›› 2015, Vol. 19 ›› Issue (15): 2310-2314.doi: 10.3969/j.issn.2095-4344.2015.15.003

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Expression of matrix metalloproteinase-3 and tissue inhibitor of metalloproteinase 1 in knee articular cartilage

Yang Li-qun1, Zhang Guo-bin2, Xi Jin-kun1, 3, Tian Fa-ming3   

  1. 1Basic Medicine School, 2Graduate School, 3Medical Research Center, North China University of Science and Technology, Tangshan 063000, Hebei Province, China
  • Revised:2015-03-03 Online:2015-04-09 Published:2015-04-09
  • Contact: Xi Jin-kun, M.D., Professor, Basic Medicine School, North China University of Science and Technology, Tangshan 063000, Hebei Province, China; Medical Research Center, North China University of Science and Technology, Tangshan 063000, Hebei Province, China;Tian Fa-ming, M.D., Associate professor, Medical Research Center, North China University of Science and Technology, Tangshan 063000, Hebei Province, China
  • About author:Yang Li-qun, Associate chief physician, Basic Medicine School, North China University, of Science and Technology, Tangshan 063000, Hebei Province, China
  • Supported by:

    the Doctoral Scientific Research Fund of Hebei United University; Tangshan Key Laboratory Project of Geriatric Medicine, No. 14140221B

Abstract:

BACKGROUND: Tissue inhibitor of matrix metalloproteinase 1 (TIMP-1) is the corresponding antagonist of matrix metalloproteinase 13 (MMP-13), and their balance between expression and functional activity exerts an important role in the metabolic state of the extracellular matrix. During the development of osteoarthritis, however, TIMP-1 and MMP-13 expressions and their expression ratio show unclear changes in DH guinea pigs.
OBJECTIVE: To explore the expression levels of MMP-13 and TIMP-1 in DH guinea pigs with different ages, and to analyze the relationship between the ratio of MMP-13 to TIMP-1 and the age-dependent degenerative changes in the articular cartilage.
METHODS: Twenty-four female Dunkin Hartley guinea pigs were sacrificed at age of 2, 4, 8, 12 months separately, with six animals at each time point. The knee joints were collected and gross visual appearance of the articular cartilage was observed, then were decalcified and prepared for paraffin sections. VG staining and Mankin score were used to analyze the histological changes. Immunohistochemistry was conducted to assess the expression levels of MMP-13 and TIMP-1 in the cartilage. Integrated absorbance values were used as the quantitive analysis calculated by Image pro-Plus 6.0. Linear regression analysis was done to analysis the relationship between Mankin score and the ratio of MMP-13/TIMP-1.
RESULTS AND CONCLUSION: Normal appearance in the articular cartilage was observed in 2-month-old DH guinea pigs, while degenerative changes in the articular cartilage were shown in 4-month-old animals, which became severer with age. Significant difference was found in Mankin score between any two groups (P < 0.05). The ratio of MMP-13 to TIMP-1 increased with age, and the ratio was positively correlated to the Mankin score (P < 0.05). Age-related articular cartilage degeneration occurred in Dunkin Hartley guinea pigs at 4 months of age, and devoloped with age, which is related with the imbanlance of the expression ratio of MMP-13 to TIMP-1.



中国组织工程研究
杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程


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Key words: Osteoarthritis, Matrix Metalloproteinases, Guinea Pigs

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