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Article

p53 protein subcellular localization and apoptosis in rodent corneal epithelium cell culture following ultraviolet irradiation

  • Authors:
    • Yevgeny Tendler
    • Russell Pokroy
    • Alex Panshin
    • Gary Weisinger
  • View Affiliations / Copyright

    Affiliations: Department of Clinical Biochemistry, Rambam Medical Center, Haifa, Israel, Department of Ophthalmology, Assaf Harofeh Medical Center, Be'er Ya'akov, Israel, Unit of Molecular Virology, Division of Avian Diseases, Kimron Veterinary Institute, Beit Dagan, Israel, Department of Endocrinology, Sourasky Medical Center, Tel Aviv, Israel
  • Pages: 540-546
    |
    Published online on: January 16, 2013
       https://doi.org/10.3892/ijmm.2013.1247
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Abstract

The tumor-suppressor gene p53 encodes a phosphoprotein involved in the control of cell growth. p53 expression and function have been documented in malignancy, apoptosis and the aging processes. Recently, p53 has been mapped and characterized in the normal cornea across different species. In the present study, high levels of cytoplasmic p53 protein were noted in normal primary corneal epithelium cultures by immunohistochemistry and western blot analysis. Following ultraviolet (UV) irradiation, the level of cytoplasmic p53 protein expression was increased beginning from 30 min and lasting until 6 h post-irradiation and then returned close to control levels by 24 h. Cytoplasmic p53 phosphorylation was detected from 30 min following UV treatment until 6 h post-irradiation. p53 protein became apparent in the nucleus in a fraction of these cultured cells beginning 30 min following UV irradiation and was still present 24 h later. We also found that p53 colocalized with mitochondria 2 h following UV irradiation in some of the cells and remained there up to 24 h. As the expression levels of p53 transcription following UV irradiation were not significantly altered, the increase in cytoplasmic p53 protein expression may be conditional only upon post-translational stabilization. We also observed that the apoptotic index increased following UV irradiation in the same time frame as the p53 nuclear transfer and was partially suppressed by pifithrin-α, which is a reversible inhibitor of p53-mediated apoptosis and p53-dependent gene transcription. The present study offers new evidence suggesting that cytoplasmic p53 in rodent corneal epithelium is functionally active.
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Copy and paste a formatted citation
Spandidos Publications style
Tendler Y, Pokroy R, Panshin A and Weisinger G: p53 protein subcellular localization and apoptosis in rodent corneal epithelium cell culture following ultraviolet irradiation. Int J Mol Med 31: 540-546, 2013.
APA
Tendler, Y., Pokroy, R., Panshin, A., & Weisinger, G. (2013). p53 protein subcellular localization and apoptosis in rodent corneal epithelium cell culture following ultraviolet irradiation. International Journal of Molecular Medicine, 31, 540-546. https://doi.org/10.3892/ijmm.2013.1247
MLA
Tendler, Y., Pokroy, R., Panshin, A., Weisinger, G."p53 protein subcellular localization and apoptosis in rodent corneal epithelium cell culture following ultraviolet irradiation". International Journal of Molecular Medicine 31.3 (2013): 540-546.
Chicago
Tendler, Y., Pokroy, R., Panshin, A., Weisinger, G."p53 protein subcellular localization and apoptosis in rodent corneal epithelium cell culture following ultraviolet irradiation". International Journal of Molecular Medicine 31, no. 3 (2013): 540-546. https://doi.org/10.3892/ijmm.2013.1247
Copy and paste a formatted citation
x
Spandidos Publications style
Tendler Y, Pokroy R, Panshin A and Weisinger G: p53 protein subcellular localization and apoptosis in rodent corneal epithelium cell culture following ultraviolet irradiation. Int J Mol Med 31: 540-546, 2013.
APA
Tendler, Y., Pokroy, R., Panshin, A., & Weisinger, G. (2013). p53 protein subcellular localization and apoptosis in rodent corneal epithelium cell culture following ultraviolet irradiation. International Journal of Molecular Medicine, 31, 540-546. https://doi.org/10.3892/ijmm.2013.1247
MLA
Tendler, Y., Pokroy, R., Panshin, A., Weisinger, G."p53 protein subcellular localization and apoptosis in rodent corneal epithelium cell culture following ultraviolet irradiation". International Journal of Molecular Medicine 31.3 (2013): 540-546.
Chicago
Tendler, Y., Pokroy, R., Panshin, A., Weisinger, G."p53 protein subcellular localization and apoptosis in rodent corneal epithelium cell culture following ultraviolet irradiation". International Journal of Molecular Medicine 31, no. 3 (2013): 540-546. https://doi.org/10.3892/ijmm.2013.1247
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