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Article

miRNA regulation of Sirtuin‑1 expression in human astrocytoma

  • Authors:
    • Sara Giovanna Romeo
    • Alfredo Conti
    • Francesca Polito
    • Chiara Tomasello
    • Valeria Barresi
    • Domenico La Torre
    • Maria Cucinotta
    • Flavio Filippo Angileri
    • Marcello Bartolotta
    • Rosa Maria Di Giorgio
    • M'Hammed Aguennouz
  • View Affiliations / Copyright

    Affiliations: Department of Neurosciences, University of Messina, I-98125 Messina, Italy, Department of Human Pathology, University of Messina, I-98125 Messina, Italy
  • Pages: 2992-2998
    |
    Published online on: August 5, 2016
       https://doi.org/10.3892/ol.2016.4960
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Abstract

Sirtuins are a family of 7 histone deacetylases largely involved in the regulation of cell proliferation, survival and death. The role of sirtuins in tumorigenesis and cancer progression has been previously studied in certain cancer types. Few studies have investigated sirtuin expression in gliomas, with controversial results. The aim of the present study was to investigate the expression of sirtuin‑1 (Sirt‑1) in diffuse astrocytoma [low grade astrocytoma (LGA)], anaplastic astrocytoma (AA) and glioblastoma multiforme (GBM) and in primary glioma cell lines: PLGAC (primary LGA cells); PAAC (primary AA cells); and PGBMC (primary GBM cells). Tumor samples were obtained from patients who underwent craniotomy for microsurgical tumor resection at the Neurosurgery Unit of the University of Messina between 2011 and 2014. Sirt‑1 expression was qualitatively analyzed in 30 human glial tumor samples and 5 non‑neoplastic brain tissue (NBT) specimens using immunohistochemistry and western blotting techniques. Sirt‑1 expression was quantitatively analyzed by reverse transcription‑quantitative polymerase chain reaction (RT‑qPCR). In addition, Sirt‑1 expression in primary cell lines was investigated by immunoblotting and RT‑qPCR. Sirt‑1 expression was downregulated in gliomas compared to NBTs. Sirt‑1 levels also varied among different tumor grades, with more evident downregulation in high‑grade (P<0.001) than low‑grade tumors (P<0.01). These data were confirmed in cell lines, with the exception of upregulation of protein level in the highest malignancy grade cell lines. The present results suggest a role for miRNA‑34a, miRNA‑132 and miRNA‑217 in the epigenetic control of Sirt‑1 during gliomagenesis and progression, and demonstrate the different implications of Sirt‑1 in human tissues and cell lines. Furthermore, the present results reveal that Sirt‑1 may be an intrinsic regulator of tumor progression and the regulation of Sirt‑1 involves complex molecular pathways. However, the biological functions of Sirt‑1 in gliomagenesis require additional investigation.
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Copy and paste a formatted citation
Spandidos Publications style
Romeo SG, Conti A, Polito F, Tomasello C, Barresi V, La Torre D, Cucinotta M, Angileri FF, Bartolotta M, Di Giorgio RM, Di Giorgio RM, et al: miRNA regulation of Sirtuin‑1 expression in human astrocytoma. Oncol Lett 12: 2992-2998, 2016.
APA
Romeo, S.G., Conti, A., Polito, F., Tomasello, C., Barresi, V., La Torre, D. ... Aguennouz, M. (2016). miRNA regulation of Sirtuin‑1 expression in human astrocytoma. Oncology Letters, 12, 2992-2998. https://doi.org/10.3892/ol.2016.4960
MLA
Romeo, S. G., Conti, A., Polito, F., Tomasello, C., Barresi, V., La Torre, D., Cucinotta, M., Angileri, F. F., Bartolotta, M., Di Giorgio, R. M., Aguennouz, M."miRNA regulation of Sirtuin‑1 expression in human astrocytoma". Oncology Letters 12.4 (2016): 2992-2998.
Chicago
Romeo, S. G., Conti, A., Polito, F., Tomasello, C., Barresi, V., La Torre, D., Cucinotta, M., Angileri, F. F., Bartolotta, M., Di Giorgio, R. M., Aguennouz, M."miRNA regulation of Sirtuin‑1 expression in human astrocytoma". Oncology Letters 12, no. 4 (2016): 2992-2998. https://doi.org/10.3892/ol.2016.4960
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Spandidos Publications style
Romeo SG, Conti A, Polito F, Tomasello C, Barresi V, La Torre D, Cucinotta M, Angileri FF, Bartolotta M, Di Giorgio RM, Di Giorgio RM, et al: miRNA regulation of Sirtuin‑1 expression in human astrocytoma. Oncol Lett 12: 2992-2998, 2016.
APA
Romeo, S.G., Conti, A., Polito, F., Tomasello, C., Barresi, V., La Torre, D. ... Aguennouz, M. (2016). miRNA regulation of Sirtuin‑1 expression in human astrocytoma. Oncology Letters, 12, 2992-2998. https://doi.org/10.3892/ol.2016.4960
MLA
Romeo, S. G., Conti, A., Polito, F., Tomasello, C., Barresi, V., La Torre, D., Cucinotta, M., Angileri, F. F., Bartolotta, M., Di Giorgio, R. M., Aguennouz, M."miRNA regulation of Sirtuin‑1 expression in human astrocytoma". Oncology Letters 12.4 (2016): 2992-2998.
Chicago
Romeo, S. G., Conti, A., Polito, F., Tomasello, C., Barresi, V., La Torre, D., Cucinotta, M., Angileri, F. F., Bartolotta, M., Di Giorgio, R. M., Aguennouz, M."miRNA regulation of Sirtuin‑1 expression in human astrocytoma". Oncology Letters 12, no. 4 (2016): 2992-2998. https://doi.org/10.3892/ol.2016.4960
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