Open Access

Mycobacterium tuberculosis infection increases the number of osteoclasts and inhibits osteoclast apoptosis by regulating TNF‑α‑mediated osteoclast autophagy

  • Authors:
    • Wei Liu
    • Juan Zhou
    • Fei Niu
    • Feifei Pu
    • Zhiwei Wang
    • Mi Huang
    • Xiaolong Zhao
    • Lin Yang
    • Pengfei Tao
    • Ping Xia
    • Jing Feng
  • View Affiliations

  • Published online on: June 18, 2020     https://doi.org/10.3892/etm.2020.8903
  • Pages: 1889-1898
  • Copyright: © Liu et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Osteoarticular tuberculosis, a chronic inflammatory disease characterized by Mycobacterium tuberculosis (M.tb) infection, has become a serious problem in China. The present study was conducted to determine the mechanism of action of tumor necrosis factor (TNF)‑α in the pathogenesis of osteoarticular tuberculosis. The number of osteoclasts in osteoarticular tuberculosis tissue samples was detected by tartrate‑resistant acid phosphatase staining. Autophagy and apoptosis of osteoclasts were detected by western blotting, reverse transcription‑quantitative PCR, transmission electron microscopy and TUNEL staining. The results showed that autophagy and the number of osteoclasts increased in the lesions of patients with osteoarticular tuberculosis compared with osteoarthritis samples. Moreover, activation of osteoclast autophagy inhibited the apoptosis of osteoclasts infected with M.tb, and increased the expression level of TNF‑α. The results showed that TNF‑α enhanced the autophagic activity of M.tb‑infected osteoclasts and inhibited cell apoptosis. These findings indicated that M.tb infection induced osteoclast production and inhibited osteoclast apoptosis by regulating TNF‑α‑mediated osteoclast autophagy, revealing a new mechanism for TNF‑α in the pathogenesis of osteoarticular tuberculosis.

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September-2020
Volume 20 Issue 3

Print ISSN: 1792-0981
Online ISSN:1792-1015

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Spandidos Publications style
Liu W, Zhou J, Niu F, Pu F, Wang Z, Huang M, Zhao X, Yang L, Tao P, Xia P, Xia P, et al: Mycobacterium tuberculosis infection increases the number of osteoclasts and inhibits osteoclast apoptosis by regulating TNF‑α‑mediated osteoclast autophagy. Exp Ther Med 20: 1889-1898, 2020
APA
Liu, W., Zhou, J., Niu, F., Pu, F., Wang, Z., Huang, M. ... Feng, J. (2020). Mycobacterium tuberculosis infection increases the number of osteoclasts and inhibits osteoclast apoptosis by regulating TNF‑α‑mediated osteoclast autophagy. Experimental and Therapeutic Medicine, 20, 1889-1898. https://doi.org/10.3892/etm.2020.8903
MLA
Liu, W., Zhou, J., Niu, F., Pu, F., Wang, Z., Huang, M., Zhao, X., Yang, L., Tao, P., Xia , P., Feng, J."Mycobacterium tuberculosis infection increases the number of osteoclasts and inhibits osteoclast apoptosis by regulating TNF‑α‑mediated osteoclast autophagy". Experimental and Therapeutic Medicine 20.3 (2020): 1889-1898.
Chicago
Liu, W., Zhou, J., Niu, F., Pu, F., Wang, Z., Huang, M., Zhao, X., Yang, L., Tao, P., Xia , P., Feng, J."Mycobacterium tuberculosis infection increases the number of osteoclasts and inhibits osteoclast apoptosis by regulating TNF‑α‑mediated osteoclast autophagy". Experimental and Therapeutic Medicine 20, no. 3 (2020): 1889-1898. https://doi.org/10.3892/etm.2020.8903