Chinese Journal of Tissue Engineering Research

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Diagnostic markers in synovial fluid during prosthetic loosening after total
knee arthroplasty

Zhao Xu-hong, Wu Ji, Li Song-lin, Chu Dong   

  1. Department of the Orthopedics, General Hospital of Air Force of PLA, Beijing  100142, China
  • Received:2012-12-22 Revised:2013-01-16 Online:2013-06-25 Published:2013-06-25
  • Contact: Wu Ji, M.D., Professor, Chief physician, Department of the Orthopedics, General Hospital of Air Force of PLA, Beijing 100142, China bjwuji@gmail.com
  • About author:Zhao Xu-hong, Attending physician, Department of the Orthopedics, General Hospital of Air Force of PLA, Beijing 100142, China zhaoxuhong30@gmail.com

Abstract:

BACKGROUND: Aseptic loosening of the prosthesis is a common complication after total knee arthroplasty. Whether the loosening of the prosthesis has relationship with the levels of tenascin-C, interleukin-6 and tumor necrosis factor is not clear.
OBJECTIVE: To observe the expressions of interleukin-6, tumor necrosis factor α and tenascin-C of the patients with aseptic prosthesis loosening after total knee arthroplasty.
METHODS: Forty-five patients treated with total knee arthroplasty and revision surgery were selected as the experimental group, and 25 patients treated with initial total knee arthroplasty were selected as the control group. In the experimental group, the patients with history of inflammatory arthritis, systemic secondary arthritis infection, autoimmune disease and combined hepatitis, malignant tumors, hormones or  immunosuppressants administration were eliminated. Synovial fluid samples of the prostheses in each group were obtained, and the expression of tenascin-C shear variants in synovial fluid was tested with Western-blot. The levels of interleukin-6, tumor necrosis factor α and tenascin-C were analyzed with enzyme-linked
immunosorbent assay.  
RESULTS AND CONCLUSION: Western blot results showed the presence of large tenascin-C variants in the synovial fluid of prostheses with loosening. The interleukin-6 and tenascin-C levels in the synovial fluid of prosthesis loosening were approximately three times higher than those in the control group, and tumor necrosis factor α level in the synovial fluid of prosthesis loosening was approximately 2.5 times higher than that in the control group. Levels of tenascin-C including large variant subunits are elevated in synovial fluid of prosthesis loosening, indicating that tenascin-C is a useful novel biochemical marker of prosthesis loosening.

Key words: bone and joint implants, artificial prosthesis, arthroplasty, aseptic loosening, synovial fluid, tenascin-c, interlenkin-6, tumor necrosis factor α, marker, cytokine

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