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Association between CIRP expression and hypoxic‑ischemic brain injury in neonatal rats

  • Authors:
    • Lifang Chen
    • Qiaohuan Tian
    • Weihua Wang
  • View Affiliations / Copyright

    Affiliations: Department of Paediatrics, Liaocheng Third People's Hospital, Liaocheng, Shandong 252000, P.R. China, Department of Paediatrics, The First People's Hospital of Xianyang City, Xianyang, Shaanxi 712000, P.R. China
    Copyright: © Chen et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 1515-1520
    |
    Published online on: July 11, 2019
       https://doi.org/10.3892/etm.2019.7767
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Abstract

The role of cold inducible RNA‑binding protein (CIRP) in mediating ischemic brain injury in neonatal rats under chronic hypobaric hypoxia was investigated. The neonatal rat model of chronic hypobaric hypoxia and the cell culture model of SH‑SY5Y cells exposed to hypoxia (1% O2) were constructed. The expression of CIRP and hypoxia‑inducible factor‑1α (HIF‑1α) was detected after hypoxic exposure, and the apoptosis‑related proteins were analyzed via terminal deoxynucleotidyl transferase‑mediated dUTP nick end-labeling (TUNEL) and western blot analysis to detect neuronal apoptosis. Moreover, the effects of CIRP overexpression on HIF‑1α and neuronal apoptosis were identified. Chronic hypobaric hypoxia can lead to HIF‑1α expression and neuronal apoptosis in the body. CIRP was induced at early exposure (3 d/7 d). However, the CIRP level in the hypoxic group was obviously lower than that in the control group with the prolongation of exposure time (21 d). In addition, the knockdown of HIF‑1α significantly reduced the neuronal apoptosis under hypoxic conditions, indicating that HIF‑1α may promote apoptosis during exposure. The overexpression of CIRP significantly inhibited the upregulation of HIF‑1α during hypoxia and the HIF‑1α‑mediated neuronal apoptosis. Results of the current study showed that, CIRP is involved in the ischemic brain injury induced by chronic hypoxia through downregulation of HIF‑1α expression.
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Copy and paste a formatted citation
Spandidos Publications style
Chen L, Tian Q and Wang W: Association between CIRP expression and hypoxic‑ischemic brain injury in neonatal rats. Exp Ther Med 18: 1515-1520, 2019.
APA
Chen, L., Tian, Q., & Wang, W. (2019). Association between CIRP expression and hypoxic‑ischemic brain injury in neonatal rats. Experimental and Therapeutic Medicine, 18, 1515-1520. https://doi.org/10.3892/etm.2019.7767
MLA
Chen, L., Tian, Q., Wang, W."Association between CIRP expression and hypoxic‑ischemic brain injury in neonatal rats". Experimental and Therapeutic Medicine 18.3 (2019): 1515-1520.
Chicago
Chen, L., Tian, Q., Wang, W."Association between CIRP expression and hypoxic‑ischemic brain injury in neonatal rats". Experimental and Therapeutic Medicine 18, no. 3 (2019): 1515-1520. https://doi.org/10.3892/etm.2019.7767
Copy and paste a formatted citation
x
Spandidos Publications style
Chen L, Tian Q and Wang W: Association between CIRP expression and hypoxic‑ischemic brain injury in neonatal rats. Exp Ther Med 18: 1515-1520, 2019.
APA
Chen, L., Tian, Q., & Wang, W. (2019). Association between CIRP expression and hypoxic‑ischemic brain injury in neonatal rats. Experimental and Therapeutic Medicine, 18, 1515-1520. https://doi.org/10.3892/etm.2019.7767
MLA
Chen, L., Tian, Q., Wang, W."Association between CIRP expression and hypoxic‑ischemic brain injury in neonatal rats". Experimental and Therapeutic Medicine 18.3 (2019): 1515-1520.
Chicago
Chen, L., Tian, Q., Wang, W."Association between CIRP expression and hypoxic‑ischemic brain injury in neonatal rats". Experimental and Therapeutic Medicine 18, no. 3 (2019): 1515-1520. https://doi.org/10.3892/etm.2019.7767
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