miR-331-3p regulates expression of neuropilin-2 in glioblastoma.

miR-331-3p regulates expression of neuropilin-2 in glioblastoma.
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miR-331-3p调节神经蛋白-2在胶质母细胞瘤中的表达。

DOI:
10.1007/s11060-013-1271-7
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发表时间:
2014-01
影响因子:
3.9
通讯作者:
Leedman, Peter J.
Leedman, Peter J.
中科院分区:
医学2区
文献类型:
--
作者:
Epis, Michael R.;Giles, Keith M.;Candy, Patrick A.;Webster, Rebecca J.;Leedman, Peter J.

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microRNAs(miRNAs)是一类小的非编码调控RNA,其异常表达与高级别胶质瘤的发生、发展有关。然而,许多miRNAs在这种疾病中的确切机制仍不清楚。在这里,我们研究了miR-331- 3 p在多形性胶质母细胞瘤(GBM)中的功能作用。我们发现miR-331- 3 p在GBM细胞系中的表达显著低于正常脑中的表达,并且miR-331- 3 p的瞬时过表达抑制GBM细胞系增殖和克隆形成生长,这表明miR-331- 3 p在该系统中可能具有肿瘤抑制作用。生物信息学分析确定神经纤毛蛋白-2(NRP-2)为miR-331- 3 p的推定靶点。使用转染研究,我们验证了NRP-2 mRNA作为GBM细胞系中miR-331- 3 p的靶点,并表明NRP-2表达受miR-331- 3 p调控。RNA干扰(RNAi)在体外抑制NRP-2表达降低了GBM细胞系的生长和克隆形成生长,为NRP-2在高级别胶质瘤中的致癌作用提供了进一步的支持。我们还表明,miR-331- 3 p抑制GBM细胞迁移,部分原因是NRP-2表达减少。最后,我们在491名患者的癌症基因组图谱GBM队列中确定了miR-331- 3 p和NRP-2表达之间的显著负相关性。总之,我们的研究结果表明,miR-331- 3 p表达的丧失有助于GBM的发展和进展,至少部分通过上调NRP-2表达和增加细胞增殖和克隆生长。
Aberrant expression of microRNAs (miRNAs), a class of small non-coding regulatory RNAs, has been implicated in the development and progression of high-grade gliomas. However, the precise mechanistic role of many miRNAs in this disease remains unclear. Here, we investigate the functional role of miR-331-3p in glioblastoma multiforme (GBM). We found that miR-331-3p expression in GBM cell lines is significantly lower than in normal brain, and that transient overexpression of miR-331-3p inhibits GBM cell line proliferation and clonogenic growth, suggesting a possible tumor suppressor role for miR-331-3p in this system. Bioinformatics analysis identified neuropilin-2 (NRP-2) as a putative target of miR-331-3p. Using transfection studies, we validated NRP-2 mRNA as a target of miR-331-3p in GBM cell lines, and show that NRP-2 expression is regulated by miR-331-3p. RNA interference (RNAi) to inhibit NRP-2 expression in vitro decreased the growth and clonogenic growth of GBM cell lines, providing further support for an oncogenic role for NRP-2 in high-grade gliomas. We also show that miR-331-3p inhibits GBM cell migration, an effect due in part to reduced NRP-2 expression. Finally, we identified a significant inverse correlation between miR-331-3p and NRP-2 expression in The Cancer Genome Atlas GBM cohort of 491 patients. Together, our results suggest that a loss of miR-331-3p expression contributes to GBM development and progression, at least in part via upregulating NRP-2 expression and increasing cell proliferation and clonogenic growth.
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发表时间: 2012-01-15
影响因子: 4
作者:
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通讯作者: Mercurio, Arthur M.
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胶质母细胞瘤患者样本中真核起始因子 5A 和高尿苷形成酶的表达:对新靶向治疗的影响。
DOI: 10.1371/journal.pone.0043468
发表时间: 2012
期刊: PloS one
影响因子: 3.7
作者:
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