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Upregulation of p72 enhances malignant migration and invasion of glioma cells by repressing Beclin1 expression

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Abstract

p72 is the member of the DEAD-box RNA helicase family, which can unwind double-stranded RNA and is efficient for microRNA (miRNA, miR) processing. However, its specific role in glioma has not been elucidated. First, the expression of p72 in glioma cell lines and tissues was explored using Western blot. To explore the role of p72 on glioma progression, adenovirus inhibiting p72 was transfected into A172 and T98G cells. Cell autophagy was determined using GFPLC3 dots, and cell apoptosis was determined using flow cytometry. The effect of Beclin1 was explored using GFP-LC3 dots, flow cytometry, and colony formation. The possible miRNAs that target the 3′-untranslated region (3′-UTR) of Beclin1 were predicted using TargetScan. Dual luciferase reporter assay was applied to determine whether these miRNAs bind to the 3′-UTR of Beclin1. The expression of p72 was significantly increased in glioma cell lines and tissues. Autophagy-related protein Beclin1 was found to be significantly enhanced when p72 was inhibited. The accumulation of GFP-LC3 dots was significant in cells transfected with ad-sh-p72 compared with ad-con. Colony formation capacity and cell apoptosis were also found to be significantly decreased with p72 inhibition. Furthermore, upregulation of Beclin1 contributes to A172 cell autophagy, invasion, and apoptosis. Overexpression of p72 induces increased miR-34-5p and miR-5195-3p expression in A172 and T98G cells. Beclin1 was the target gene of miR-34-5p and miR-5195-3p. In conclusion, we found for the first time that overexpression of p72 decreased Beclin1 expression partially by increasing miR-34-5p and miR-5195-3p expression in A172 and T98G cells.

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Authors and Affiliations

  1. Department of Neurosurgery, Liaoning Medical University, 121001, Jinzhou, China

    Zhenxing Zhang, Ye Miao, Xu Feng, Yang Li & Honglei Wang

  2. Department of Histology and Embryology, Liaoning Medical University, 121001, Jinzhou, China

    He Tian & Xiaofeng Song

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  1. Zhenxing Zhang
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  2. He Tian
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  3. Ye Miao
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  4. Xu Feng
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  5. Yang Li
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  6. Honglei Wang
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  7. Xiaofeng Song
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Correspondence to Xiaofeng Song.

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Originally published in Biochemistry (Moscow) On-Line Papers in Press, as Manuscript BM15-382, April 3, 2016.

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Zhang, Z., Tian, H., Miao, Y. et al. Upregulation of p72 enhances malignant migration and invasion of glioma cells by repressing Beclin1 expression. Biochemistry Moscow 81, 574–582 (2016). https://doi.org/10.1134/S0006297916060031

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  • DOI: https://doi.org/10.1134/S0006297916060031

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