Long non-coding RNA TP73-AS1 contributes to glioma tumorigenesis by sponging the miR-103a/GALNT7 pathway

Long non-coding RNA TP73-AS1 contributes to glioma tumorigenesis by sponging the miR-103a/GALNT7 pathway
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长非编码 RNA TP73-AS1 通过海绵 miR-103a/GALNT7 通路促进胶质瘤肿瘤发生

DOI:
10.1016/j.brainres.2020.146886
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发表时间:
2020-05
期刊:
影响因子:
2.9
通讯作者:
Lin Zhi-Guo
Lin Zhi-Guo
中科院分区:
医学3区
文献类型:
--
作者:
Wang Jia-Bin;Chen Xiao-Li;Han Zhi-Bin;Wang Hong-Wei;Wang Zhi-Hua;Li Nan-Nan;Lin Zhi-Guo

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胶质瘤是最具侵袭性的,常见于成人的脑肿瘤。长链非编码rna (lncRNAs)是癌症发生过程中的基因表达调控因子之一。先前的研究认为,LncRNA TP73-AS1 (TP73-AS1)在胶质瘤中的上调与低存活率有关。然而,LncRNA TP73-AS1在胶质瘤中的确切机制尚不清楚。在此,我们发现TP73-AS1在胶质瘤中上调,并与预后不良相关。TP73-AS1的沉默抑制了胶质瘤细胞的增殖,导致细胞死亡。在机制上,我们通过从GALNT7中分离miR-103a,发现胶质瘤中的TP73-AS1作为ceRNA。此外,本研究结果揭示了TP73-AS1与miR-103a之间的相互表达,TP73-AS1与GALNT7之间的正调控,验证了所确定的机制。此外,荧光素酶报告基因检测发现miR-103a是TP73-AS1和GALNT7的直接结合位点。此外,CCK-8和集落形成实验的结果表明,外源表达GALNT7逆转了tp73 - as1诱导的胶质瘤细胞分裂抑制。总之,我们的研究结果表明,TP73-AS1通过在TP73-AS1/miR-103a/GALNT7环中竞争内源性RNA (ceRNA)来促进胶质瘤的进展。
Glioma is the most aggressive, commonly occurring brain tumor in adults. Long non-coding RNAs (lncRNAs) are among the gene expression regulators in cancer development. Previous research posited that the up-regulation of LncRNA TP73-AS1 (TP73-AS1) in glioma is linked to low survival rates. However, the precise LncRNA TP73-AS1 mechanism in glioma remains unknown. Herein, we found that TP73-AS1 was up-regulated in glioma and was associated with a dismal prognosis. The silencing of TP73-AS1 repressed the multiplication of glioma cells and caused cell death. Mechanistically, we identified that TP73-AS1 in glioma acts as a ceRNA by sequestering miR-103a from GALNT7. Further, the results of this study revealed a reciprocal expression between TP73-AS1 and miR-103a, and a positive regulation between TP73-AS1 and GALNT7, validating the identified mechanism. Besides, luciferase reporter assay identified miR-103a as the direct binding site of both TP73-AS1 and GALNT7. Moreover, the findings of CCK-8 and colony-formation assays indicated that exogenous expression of GALNT7 reversed TP73-AS1-induced division inhibition of glioma cells. Altogether, our results established that TP73-AS1 facilitates the progression of glioma through competing for endogenous RNA (ceRNA) in a TP73-AS1/miR-103a/GALNT7 loop.
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