PI3K Pathway Inhibition with NVP-BEZ235 Hinders Glycolytic Metabolism in Glioblastoma Multiforme Cells.

PI3K Pathway Inhibition with NVP-BEZ235 Hinders Glycolytic Metabolism in Glioblastoma Multiforme Cells.
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NVP-BEZ235抑制PI3K通路阻碍多形性胶质母细胞瘤细胞糖酵解代谢

DOI:
10.3390/cells10113065
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发表时间:
2021-11-07
期刊:
影响因子:
6
通讯作者:
Keniry M
Keniry M
中科院分区:
生物学2区
文献类型:
--
作者:
Udawant S;Litif C;Lopez A;Gunn B;Schuenzel E;Keniry M

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胶质母细胞瘤(GBM)是最致命的原发性脑癌,缺乏有效的分子靶向治疗。 90% 的多形性胶质母细胞瘤 (GBM) 肿瘤中 PI3K/AKT/mTOR 通路被激活。为了深入了解 PI3K 通路对 GBM 代谢的影响,我们用 NVP-BEZ235(PI3K 和 mTOR 双重抑制剂)处理 U87MG GBM 细胞,并通过 RNA-seq 分析鉴定差异表达基因。 RNA-seq 鉴定了 7803 个响应 NVP-BEZ235 的差异调节基因。基因集富集分析 (GSEA) 确定了两个糖酵解相关基因集,与 NVP-BEZ235 处理的样品相比,它们在对照样品中显着富集 (p < 0.05)。我们验证了 NVP-BEZ235 对糖酵解基因的抑制作用,并检查了 FOXO1 抑制剂 (AS1842856) 在一组 GBM 细胞系中对这些基因的影响。单独抑制 FOXO1 与 LDHA 表达减少相关,但与 ENO1 或 PKM2 无关。生物信息学分析表明,受 PI3K 影响的糖酵解基因在 GBM 临床样本中过度表达和共表达。根据 Kaplan-Meier 生存分析,PI3K 影响的糖酵解基因表达升高与 GBM 预后不良相关。我们的结果提出了对与 PI3K-mTOR 双重抑制相关的标志性代谢重编程的新见解。
Glioblastoma (GBM) is the most lethal primary brain cancer that lacks effective molecular targeted therapies. The PI3K/AKT/mTOR pathway is activated in 90% of all Glioblastoma multiforme (GBM) tumors. To gain insight into the impact of the PI3K pathway on GBM metabolism, we treated U87MG GBM cells with NVP-BEZ235 (PI3K and mTOR a dual inhibitor) and identified differentially expressed genes with RNA-seq analysis. RNA-seq identified 7803 differentially regulated genes in response to NVP-BEZ235. Gene Set Enrichment Analysis (GSEA) identified two glycolysis-related gene sets that were significantly enriched (p < 0.05) in control samples compared to NVP-BEZ235-treated samples. We validated the inhibition of glycolytic genes by NVP-BEZ235 and examined the impact of the FOXO1 inhibitor (AS1842856) on these genes in a set of GBM cell lines. FOXO1 inhibition alone was associated with reduced LDHA expression, but not ENO1 or PKM2. Bioinformatics analyses revealed that PI3K-impacted glycolytic genes were over-expressed and co-expressed in GBM clinical samples. The elevated expression of PI3K-impacted glycolytic genes was associated with poor prognosis in GBM based on Kaplan–Meier survival analyses. Our results suggest novel insights into hallmark metabolic reprogramming associated with the PI3K-mTOR dual inhibition.
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发表时间: 2021
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