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The JNK signaling pathway against titanium-particle-induced osteoclastogenesis and bone resorption in vivo

Z-G Liu1, J-B Zhao, C Zhang

  • 1School of Clinical Medicine, Guangxi Medical University, Nanning, China. chendesheng@nxmu.edu.cn.

European Review for Medical and Pharmacological Sciences
|November 17, 2023
PubMed
Abstract

Insights

SB600125, a JNK inhibitor, reduced titanium particle-induced osteolysis by decreasing inflammatory markers. This suggests targeting the JNK pathway may treat aseptic loosening from wear debris.

Area of Science:

  • Biomedical Engineering
  • Immunology
  • Orthopedics

Background:

  • The c-Jun N-terminal kinases (JNK) signaling pathway is implicated in osteoclast development.
  • Titanium particle-induced osteolysis is a significant concern in orthopedic implant loosening.

Purpose of the Study:

  • To investigate the efficacy of SB600125, a JNK inhibitor, in attenuating titanium particle-induced inflammatory osteolysis in vivo.

Main Methods:

  • An air pouch bone graft model was established in mice.
  • Mice were divided into Sham, Titanium, and Titanium + JNK inhibitor groups.
  • Morphological and molecular analyses were performed on pouch membranes.

Main Results:

  • SB600125 significantly attenuated titanium particle-induced osteolysis by inhibiting JNK expression (p<0.05).
  • SB600125 reduced IL-6 and TNF-α expression in osteolytic sites (p<0.05).
  • Western blot confirmed reduced p-JNK protein expression in the SB600125-treated group (p<0.05).

Conclusions:

  • Inhibiting the JNK signaling pathway is beneficial in reducing osteolysis.
  • Targeting the JNK pathway offers a potential therapeutic strategy for aseptic loosening caused by debris-induced inflammatory osteolysis.

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