miR-340 suppresses glioblastoma multiforme.

miR-340 suppresses glioblastoma multiforme.
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miR-340 抑制多形性胶质母细胞瘤

DOI:
10.18632/oncotarget.3288
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发表时间:
2015-04-20
期刊:
影响因子:
--
通讯作者:
Peng Y
Peng Y
中科院分区:
其他
文献类型:
--
作者:
Huang D;Qiu S;Ge R;He L;Li M;Li Y;Peng Y

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microRNA(miRs)的失调有助于肿瘤发生。在多种类型的癌症中观察到miR-340的下调。然而,miR-340在多形性胶质母细胞瘤(GBM)中的生物学功能仍然很大程度上未知。在本研究中,我们证明了miR-340在胶质瘤细胞系和组织中的表达下调。与表达低水平miR-340的患者相比,具有高水平miR-340的GBM患者的生存期显著延长。生物学功能实验表明,恢复miR-340可显著抑制胶质瘤细胞增殖,诱导细胞周期阻滞和凋亡,抑制细胞运动,促进自噬和终末分化。机制研究表明,miR-340过表达抑制了p-AKT、EZH 2、EGFR、BMI 1和XIAP等多种癌基因的表达。此外,ROCK 1被验证为miR-340的直接功能靶标,并且ROCK 1的沉默表型模仿了mR-340的抗肿瘤作用。我们的研究结果表明miR-340作为胶质瘤杀手的重要作用,并提出了GBM的潜在预后生物标志物和治疗靶点。
Deregulation of microRNAs (miRs) contributes to tumorigenesis. Down-regulation of miR-340 is observed in multiple types of cancers. However, the biological function of miR-340 in glioblastoma multiforme (GBM) remains largely unknown. In the present study, we demonstrated that expression of miR-340 was downregulated in both glioma cell lines and tissues. Survival of GBM patients with high levels of miR-340 was significantly extended in comparison to patients expressing low miR-340 levels. Biological functional experiments showed that the restoration of miR-340 dramatically inhibited glioma cell proliferation, induced cell-cycle arrest and apoptosis, suppressed cell motility and promoted autophagy and terminal differentiation. Mechanistic studies disclosed that, miR-340 over-expression suppressed several oncogenes including p-AKT, EZH2, EGFR, BMI1 and XIAP. Furthermore, ROCK1 was validated as a direct functional target miR-340 and silencing of ROCK1 phenocopied the anti-tumor effect of mR-340. Our findings indicate an important role of miR-340 as a glioma killer, and suggest a potential prognosis biomarker and therapeutic target for GBM.
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发表时间: 2010-11-29
影响因子: --
作者:
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发表时间: 2009-07-15
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癌蛋白 Bmi-1 通过激活 IKK-核因子-kappaB 通路,对神经胶质瘤细胞产生凋亡抵抗。
DOI: 10.2353/ajpath.2010.090502
发表时间: 2010-02-01
影响因子: 6
作者:
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通讯作者: Li, Mengfeng
DOI: 10.1177/1947601912448068
发表时间: 2012-01-01
期刊: Genes & cancer
影响因子: --
作者:
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通讯作者: Moy, Fred