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Article

Suppression of SIRT6 by miR-33a facilitates tumor growth of glioma through apoptosis and oxidative stress resistance

  • Authors:
    • Mingze Chang
    • Lin Qiao
    • Bin Li
    • Juanhong Wang
    • Gejuan Zhang
    • Wenzhen Shi
    • Zhiqin Liu
    • Naibing Gu
    • Zhengli Di
    • Xinlai Wang
    • Ye Tian
  • View Affiliations / Copyright

    Affiliations: Department of Neurology, Xi'an Central Hospital, Xi'an Jiaotong University School of Medicine, Xi'an, Shaanxi 710003, P.R. China, Department of Anesthesiology, Xi'an No. 5 Hospital, Xi'an, Shaanxi 710082, P.R. China, Department of Pathology, Xi'an Central Hospital, Xi'an Jiaotong University School of Medicine, Xi'an, Shaanxi 710003, P.R. China, Department of Neurology, Xi'an Third Hospital, Xi'an, Shaanxi 710004, P.R. China
  • Pages: 1251-1258
    |
    Published online on: July 3, 2017
       https://doi.org/10.3892/or.2017.5780
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Abstract

microRNA-33a (miR-33a) belongs to the miR-33 family that is implicated in the progression of various types of cancers. Aberrant expression of miR-33a has been detected in several human cancers, and has been shown to regulate the migration and invasion as well as proliferation and apoptosis of tumor cells. However, the clinical significance and precise mechanisms underlying the dysfunction of miR-33a in glioma have not been well investigated in previous studies. In this study, overexpression of miR-33a was observed in clinical glioma specimens and cell lines. Clinicopathological detection revealed that miR-33a highly expressing patients showed large tumor sized and advanced World Health Organization (WHO) grade as well as reduced overall survival. Furthermore, the results of in vitro experiments confirmed that loss of miR-33a resulted in reduced proliferation and enhanced apoptosis in U251 cells, while miR-33a restoration showed opposite effects in U87 cells. Further studies indicated that miR-33a knockdown restrained tumor growth of glioma in vivo. miR-33a negatively regulated the expression of sirtuin 6 (SIRT6) at both mRNA and protein levels via targeting the 3'UTR of SIRT6 mRNA. SIRT6 was underexpressed and inversely correlated with miR-33a expression in the glioma tissues. Mechanistically, SIRT6 overexpression increased the levels of lactate dehydrogenase (LDH) and reactive oxygen species (ROS) while it reduced cell survival under H2O2 treatment. In addition, SIRT6 restoration led to apoptosis with alterative expression of Bax, Bcl-2, cleaved caspase-8, and inhibition of Janus kinase 2 (JAK2)/signal transducer and activator of transcription 3 (STAT3) pathway in glioma. Thus, our studies demonstrated that the deregulation of miR-33a may promote tumor development in human glioma by regulating the expression of its target gene, SIRT6.
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Copy and paste a formatted citation
Spandidos Publications style
Chang M, Qiao L, Li B, Wang J, Zhang G, Shi W, Liu Z, Gu N, Di Z, Wang X, Wang X, et al: Suppression of SIRT6 by miR-33a facilitates tumor growth of glioma through apoptosis and oxidative stress resistance. Oncol Rep 38: 1251-1258, 2017.
APA
Chang, M., Qiao, L., Li, B., Wang, J., Zhang, G., Shi, W. ... Tian, Y. (2017). Suppression of SIRT6 by miR-33a facilitates tumor growth of glioma through apoptosis and oxidative stress resistance. Oncology Reports, 38, 1251-1258. https://doi.org/10.3892/or.2017.5780
MLA
Chang, M., Qiao, L., Li, B., Wang, J., Zhang, G., Shi, W., Liu, Z., Gu, N., Di, Z., Wang, X., Tian, Y."Suppression of SIRT6 by miR-33a facilitates tumor growth of glioma through apoptosis and oxidative stress resistance". Oncology Reports 38.2 (2017): 1251-1258.
Chicago
Chang, M., Qiao, L., Li, B., Wang, J., Zhang, G., Shi, W., Liu, Z., Gu, N., Di, Z., Wang, X., Tian, Y."Suppression of SIRT6 by miR-33a facilitates tumor growth of glioma through apoptosis and oxidative stress resistance". Oncology Reports 38, no. 2 (2017): 1251-1258. https://doi.org/10.3892/or.2017.5780
Copy and paste a formatted citation
x
Spandidos Publications style
Chang M, Qiao L, Li B, Wang J, Zhang G, Shi W, Liu Z, Gu N, Di Z, Wang X, Wang X, et al: Suppression of SIRT6 by miR-33a facilitates tumor growth of glioma through apoptosis and oxidative stress resistance. Oncol Rep 38: 1251-1258, 2017.
APA
Chang, M., Qiao, L., Li, B., Wang, J., Zhang, G., Shi, W. ... Tian, Y. (2017). Suppression of SIRT6 by miR-33a facilitates tumor growth of glioma through apoptosis and oxidative stress resistance. Oncology Reports, 38, 1251-1258. https://doi.org/10.3892/or.2017.5780
MLA
Chang, M., Qiao, L., Li, B., Wang, J., Zhang, G., Shi, W., Liu, Z., Gu, N., Di, Z., Wang, X., Tian, Y."Suppression of SIRT6 by miR-33a facilitates tumor growth of glioma through apoptosis and oxidative stress resistance". Oncology Reports 38.2 (2017): 1251-1258.
Chicago
Chang, M., Qiao, L., Li, B., Wang, J., Zhang, G., Shi, W., Liu, Z., Gu, N., Di, Z., Wang, X., Tian, Y."Suppression of SIRT6 by miR-33a facilitates tumor growth of glioma through apoptosis and oxidative stress resistance". Oncology Reports 38, no. 2 (2017): 1251-1258. https://doi.org/10.3892/or.2017.5780
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