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Article

Inhibition of HIF‑1α restrains fracture healing via regulation of autophagy in a rat model

  • Authors:
    • Junjie Qiao
    • Jiang Huang
    • Meng Zhou
    • Guanglei Cao
    • Huiliang Shen
  • View Affiliations / Copyright

    Affiliations: Department of Orthopedics, Xuanwu Hospital, Capital Medical University, Beijing 100053, P.R. China
  • Pages: 1884-1890
    |
    Published online on: December 19, 2018
       https://doi.org/10.3892/etm.2018.7115
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Abstract

It has been demonstrated that bone fracture is associated with the activation of autophagy, and upregulation of autophagy could promote fracture healing. Previous study by our group demonstrated that activating the HIF‑1α pathway via administration of cobalt (II) chloride (CoCl2) could promote fracture healing in vivo. However, the role of hypoxia‑inducible factor‑1α (HIF‑1α) in autophagy remains unknown. In the current study, rats were divided into two groups following tibial fracture and treated with echinomycin or dimethyl sulfoxide (DMSO). Rats were sacrificed at 7, 14, 28 and 42 days after fracture. The evaluation of fracture healing was performed by micro‑computed tomography. In addition, the effects of echinomycin on microtubule‑associated protein 1 light chain 3 (LC3 II), runt‑related transcription factor 2 (Runx2), alkaline phosphatase (ALP), Unc‑51‑like autophagy activating kinase 1 (ULK1) and P62 were detected at the mRNA and protein levels by reverse transcription‑quantitative polymerase chain reaction, western blotting and immunohistochemistry. The results demonstrated that the expression of LC3 II was markedly decreased following systemic administration of echinomycin (0.05 mg/kg every other day for 42 days, intraperitoneally). Furthermore, the levels of Runx2, ALP and ULK1 were decreased, while those of P62 were increased, at the mRNA and protein levels in rats treated with echinomycin in vivo. In summary, the current study suggested that HIF‑1α may serve an important role in fracture healing via the downregulation of autophagy.
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Copy and paste a formatted citation
Spandidos Publications style
Qiao J, Huang J, Zhou M, Cao G and Shen H: Inhibition of HIF‑1α restrains fracture healing via regulation of autophagy in a rat model. Exp Ther Med 17: 1884-1890, 2019.
APA
Qiao, J., Huang, J., Zhou, M., Cao, G., & Shen, H. (2019). Inhibition of HIF‑1α restrains fracture healing via regulation of autophagy in a rat model. Experimental and Therapeutic Medicine, 17, 1884-1890. https://doi.org/10.3892/etm.2018.7115
MLA
Qiao, J., Huang, J., Zhou, M., Cao, G., Shen, H."Inhibition of HIF‑1α restrains fracture healing via regulation of autophagy in a rat model". Experimental and Therapeutic Medicine 17.3 (2019): 1884-1890.
Chicago
Qiao, J., Huang, J., Zhou, M., Cao, G., Shen, H."Inhibition of HIF‑1α restrains fracture healing via regulation of autophagy in a rat model". Experimental and Therapeutic Medicine 17, no. 3 (2019): 1884-1890. https://doi.org/10.3892/etm.2018.7115
Copy and paste a formatted citation
x
Spandidos Publications style
Qiao J, Huang J, Zhou M, Cao G and Shen H: Inhibition of HIF‑1α restrains fracture healing via regulation of autophagy in a rat model. Exp Ther Med 17: 1884-1890, 2019.
APA
Qiao, J., Huang, J., Zhou, M., Cao, G., & Shen, H. (2019). Inhibition of HIF‑1α restrains fracture healing via regulation of autophagy in a rat model. Experimental and Therapeutic Medicine, 17, 1884-1890. https://doi.org/10.3892/etm.2018.7115
MLA
Qiao, J., Huang, J., Zhou, M., Cao, G., Shen, H."Inhibition of HIF‑1α restrains fracture healing via regulation of autophagy in a rat model". Experimental and Therapeutic Medicine 17.3 (2019): 1884-1890.
Chicago
Qiao, J., Huang, J., Zhou, M., Cao, G., Shen, H."Inhibition of HIF‑1α restrains fracture healing via regulation of autophagy in a rat model". Experimental and Therapeutic Medicine 17, no. 3 (2019): 1884-1890. https://doi.org/10.3892/etm.2018.7115
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