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International Journal of Molecular Medicine
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Article

Hypoxia-regulated neurotrophin-3 expression by multicopy hypoxia response elements reduces apoptosis in PC12 cells

  • Authors:
    • Junfeng Zhang
    • Qindong Shi
    • Xinlin Chen
    • Pengbo Yang
    • Cunfang Qi
    • Jianshui Zhang
    • Haixia Lu
    • Jianxin Liu
    • Qian Jiao
    • Lingyu Zhao
    • Bingqiao Zhao
    • Ping Zheng
    • Yong Liu
  • View Affiliations / Copyright

    Affiliations: Institute of Neurobiology, Environment and Genes Related to Diseases Key Laboratory of Education Ministry, Xi'an Jiaotong University College of Medicine, Xi'an, Shaanxi 710061, P.R. China, The State Key Laboratory of Medical Neurobiology, Shanghai 200032, P.R. China
  • Pages: 1173-1179
    |
    Published online on: September 6, 2012
       https://doi.org/10.3892/ijmm.2012.1119
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Abstract

We have previously reported that 5 copies of the hypoxia response element (HRE) can conditionally regulate brain-derived neurotrophic factor gene expression under hypoxic/ischemic conditions in mice. In the present study, we investigated the controlled expression of neurotrophin-3 (NT-3) by HRE under hypoxic conditions and determined the protective effects of conditionally expressed NT-3 on hypoxia-induced apoptosis in PC12 cells. Five copies of the HRE (5HRE) and the simian virus 40 minimal promoter (SV40mp) were employed to construct a cassette, and transfer of therapeutic gene, NT-3, into PC12 cells was achieved using a retroviral vector. Our results showed that the retroviral vector, pLNC-5HRE-NT3, was successfully constructed and transfected into PC12 cells. Compared with normal conditions, in which NT-3 was expressed at low levels, the expression of NT-3 significantly increased under hypoxic conditions in 5HRE-NT3 transgenic PC12 cells (P<0.05). By contrast, in NT-3 transgenic PC12 cells without HRE, we found no significant difference in NT-3 expression between the normoxic and hypoxic groups. The conditional adjustment of NT-3 expression by 5HRE significantly reduced apoptosis induced by hypoxia in 5HRE-NT3 transgenic PC12 cells (P<0.05) but not in 5HRE-enhanced green fluorescent protein (EGFP) transgenic PC12 cells and PC12 cells without gene transfer. In addition, the hypoxia-induced upregulation of both p38 and caspase-3 activities was suppressed in 5HRE-NT3 transgenic PC12 cells under hypoxic conditions (P<0.05). Taken together, these results demonstrate that 5HRE-SV40mp regulates NT-3 gene expression in response to hypoxia in PC12 cells. The data presented in this study may prove useful in future gene therapy studies for the treatment of ischemic diseases.
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Copy and paste a formatted citation
Spandidos Publications style
Zhang J, Shi Q, Chen X, Yang P, Qi C, Zhang J, Lu H, Liu J, Jiao Q, Zhao L, Zhao L, et al: Hypoxia-regulated neurotrophin-3 expression by multicopy hypoxia response elements reduces apoptosis in PC12 cells. Int J Mol Med 30: 1173-1179, 2012.
APA
Zhang, J., Shi, Q., Chen, X., Yang, P., Qi, C., Zhang, J. ... Liu, Y. (2012). Hypoxia-regulated neurotrophin-3 expression by multicopy hypoxia response elements reduces apoptosis in PC12 cells. International Journal of Molecular Medicine, 30, 1173-1179. https://doi.org/10.3892/ijmm.2012.1119
MLA
Zhang, J., Shi, Q., Chen, X., Yang, P., Qi, C., Zhang, J., Lu, H., Liu, J., Jiao, Q., Zhao, L., Zhao, B., Zheng, P., Liu, Y."Hypoxia-regulated neurotrophin-3 expression by multicopy hypoxia response elements reduces apoptosis in PC12 cells". International Journal of Molecular Medicine 30.5 (2012): 1173-1179.
Chicago
Zhang, J., Shi, Q., Chen, X., Yang, P., Qi, C., Zhang, J., Lu, H., Liu, J., Jiao, Q., Zhao, L., Zhao, B., Zheng, P., Liu, Y."Hypoxia-regulated neurotrophin-3 expression by multicopy hypoxia response elements reduces apoptosis in PC12 cells". International Journal of Molecular Medicine 30, no. 5 (2012): 1173-1179. https://doi.org/10.3892/ijmm.2012.1119
Copy and paste a formatted citation
x
Spandidos Publications style
Zhang J, Shi Q, Chen X, Yang P, Qi C, Zhang J, Lu H, Liu J, Jiao Q, Zhao L, Zhao L, et al: Hypoxia-regulated neurotrophin-3 expression by multicopy hypoxia response elements reduces apoptosis in PC12 cells. Int J Mol Med 30: 1173-1179, 2012.
APA
Zhang, J., Shi, Q., Chen, X., Yang, P., Qi, C., Zhang, J. ... Liu, Y. (2012). Hypoxia-regulated neurotrophin-3 expression by multicopy hypoxia response elements reduces apoptosis in PC12 cells. International Journal of Molecular Medicine, 30, 1173-1179. https://doi.org/10.3892/ijmm.2012.1119
MLA
Zhang, J., Shi, Q., Chen, X., Yang, P., Qi, C., Zhang, J., Lu, H., Liu, J., Jiao, Q., Zhao, L., Zhao, B., Zheng, P., Liu, Y."Hypoxia-regulated neurotrophin-3 expression by multicopy hypoxia response elements reduces apoptosis in PC12 cells". International Journal of Molecular Medicine 30.5 (2012): 1173-1179.
Chicago
Zhang, J., Shi, Q., Chen, X., Yang, P., Qi, C., Zhang, J., Lu, H., Liu, J., Jiao, Q., Zhao, L., Zhao, B., Zheng, P., Liu, Y."Hypoxia-regulated neurotrophin-3 expression by multicopy hypoxia response elements reduces apoptosis in PC12 cells". International Journal of Molecular Medicine 30, no. 5 (2012): 1173-1179. https://doi.org/10.3892/ijmm.2012.1119
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