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Effect of hypoxia on hypoxia inducible factor-1α, insulin-like growth factor I and vascular endothelial growth factor expression in hepatocellular carcinoma HepG2 cells

  • Authors:
    • Qiang Liu
    • Zheng Xu
    • Shunbao Mao
    • Wenyou Chen
    • Rongyao Zeng
    • Song Zhou
    • Jing Liu
  • View Affiliations / Copyright

    Affiliations: Department of General Surgery, The 175th Hospital of PLA (Affiliated Dongnan Hospital of Xiamen University), Zhangzhou, Fujian 363000, P.R. China
    Copyright: © Liu et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 1142-1148
    |
    Published online on: January 15, 2015
       https://doi.org/10.3892/ol.2015.2879
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Abstract

Hypoxic microenvironments and angiogenesis have been a focus of tumor research in previous years. The aim of the the present study was to create a hypoxic model and observe the effect of hypoxia on the expression of hypoxia inducible factor‑1α (HIF‑1α), insulin‑like growth factor I (IGF‑1) and vascular endothelial growth factor expression. The hypoxia model was generated using cobalt chloride (CoCl2) and an MTT assay was used to observe the influence of hypoxia on HepG2 cells. Reverse transcription‑polymerase chain reaction, western blotting, ELISA and confocal immunofluorescence microscopy were used to detect the expression of HIF‑1α, IGF‑1 and VEGF in HepG2 cells, in which hypoxia was induced by various concentrations of CoCl2 and for various incubation times. The cell viability worsened with increasing concentrations of CoCl2. The expression of HIF‑1α and IGF‑1R was observed in hypoxic HepG2 cells, with the exception of HIF‑1α mRNA. The expression of IGF‑1R and VEGF mRNA and protein was correlated with the concentration of CoCl2 and the time that hypoxia was induced for. The expression of HIF‑1α mRNA and protein was positively correlated with the expression of the VEGF mRNA and protein in a dose‑ and time‑dependent manner under hypoxic conditions. Using immunofluorescence, it was observed that IGF‑1R and HIF‑1α were secreted from the hypoxic HepG2 cells. It was concluded that hypoxia induces the accumulation of IGF‑1R and HIF‑1α mRNA and protein, which regulates the expression of VEGF mRNA and protein in hypoxic HepG2 cells.
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Copy and paste a formatted citation
Spandidos Publications style
Liu Q, Xu Z, Mao S, Chen W, Zeng R, Zhou S and Liu J: Effect of hypoxia on hypoxia inducible factor-1α, insulin-like growth factor I and vascular endothelial growth factor expression in hepatocellular carcinoma HepG2 cells. Oncol Lett 9: 1142-1148, 2015.
APA
Liu, Q., Xu, Z., Mao, S., Chen, W., Zeng, R., Zhou, S., & Liu, J. (2015). Effect of hypoxia on hypoxia inducible factor-1α, insulin-like growth factor I and vascular endothelial growth factor expression in hepatocellular carcinoma HepG2 cells. Oncology Letters, 9, 1142-1148. https://doi.org/10.3892/ol.2015.2879
MLA
Liu, Q., Xu, Z., Mao, S., Chen, W., Zeng, R., Zhou, S., Liu, J."Effect of hypoxia on hypoxia inducible factor-1α, insulin-like growth factor I and vascular endothelial growth factor expression in hepatocellular carcinoma HepG2 cells". Oncology Letters 9.3 (2015): 1142-1148.
Chicago
Liu, Q., Xu, Z., Mao, S., Chen, W., Zeng, R., Zhou, S., Liu, J."Effect of hypoxia on hypoxia inducible factor-1α, insulin-like growth factor I and vascular endothelial growth factor expression in hepatocellular carcinoma HepG2 cells". Oncology Letters 9, no. 3 (2015): 1142-1148. https://doi.org/10.3892/ol.2015.2879
Copy and paste a formatted citation
x
Spandidos Publications style
Liu Q, Xu Z, Mao S, Chen W, Zeng R, Zhou S and Liu J: Effect of hypoxia on hypoxia inducible factor-1α, insulin-like growth factor I and vascular endothelial growth factor expression in hepatocellular carcinoma HepG2 cells. Oncol Lett 9: 1142-1148, 2015.
APA
Liu, Q., Xu, Z., Mao, S., Chen, W., Zeng, R., Zhou, S., & Liu, J. (2015). Effect of hypoxia on hypoxia inducible factor-1α, insulin-like growth factor I and vascular endothelial growth factor expression in hepatocellular carcinoma HepG2 cells. Oncology Letters, 9, 1142-1148. https://doi.org/10.3892/ol.2015.2879
MLA
Liu, Q., Xu, Z., Mao, S., Chen, W., Zeng, R., Zhou, S., Liu, J."Effect of hypoxia on hypoxia inducible factor-1α, insulin-like growth factor I and vascular endothelial growth factor expression in hepatocellular carcinoma HepG2 cells". Oncology Letters 9.3 (2015): 1142-1148.
Chicago
Liu, Q., Xu, Z., Mao, S., Chen, W., Zeng, R., Zhou, S., Liu, J."Effect of hypoxia on hypoxia inducible factor-1α, insulin-like growth factor I and vascular endothelial growth factor expression in hepatocellular carcinoma HepG2 cells". Oncology Letters 9, no. 3 (2015): 1142-1148. https://doi.org/10.3892/ol.2015.2879
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