ATF4-dependent fructolysis fuels growth of glioblastoma multiforme.

ATF4-dependent fructolysis fuels growth of glioblastoma multiforme.
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ATF4依赖性果物解剖燃料多形胶质母细胞瘤的生长。

DOI:
10.1038/s41467-022-33859-9
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发表时间:
2022-10-16
影响因子:
16.6
通讯作者:
--
中科院分区:
综合性期刊1区
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--
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西方饮食中摄取过多的果糖会导致癌症的发生。然而,在肿瘤恶性进展过程中,癌细胞如何协调葡萄糖和果糖代谢尚不清楚。我们在这里证明,多形性胶质母细胞瘤(GBM)细胞在葡萄糖剥夺的反应中,将其能量供应从糖酵解转换为果糖酵解。从机制上讲,葡萄糖剥夺通过选择性激活激活转录因子4 (ATF4)的翻译诱导两种必需的果糖水解蛋白GLUT5和ALDOB的表达。在功能上,atf4依赖性果糖分解的遗传或药理学破坏显著抑制GBM细胞体外和体内的生长和集落形成。此外,在GBM标本中,ATF4、GLUT5和ALDOB水平呈正相关,是GBM患者预后不良的指标。这项工作强调了atf4依赖性果糖分解作为一种代谢特征和GBM的潜在治疗靶点。过量摄入果糖有助于癌症的发展,但其潜在机制尚不清楚。在这里,作者表明,葡萄糖剥夺通过选择性激活ATF4翻译诱导果糖分解,从而支持人类胶质母细胞瘤的恶性进展。
Excessive consumption of fructose in the Western diet contributes to cancer development. However, it is still unclear how cancer cells coordinate glucose and fructose metabolism during tumor malignant progression. We demonstrate here that glioblastoma multiforme (GBM) cells switch their energy supply from glycolysis to fructolysis in response to glucose deprivation. Mechanistically, glucose deprivation induces expression of two essential fructolytic proteins GLUT5 and ALDOB through selectively activating translation of activating transcription factor 4 (ATF4). Functionally, genetic or pharmacological disruption of ATF4-dependent fructolysis significantly inhibits growth and colony formation of GBM cells in vitro and GBM growth in vivo. In addition, ATF4, GLUT5, and ALDOB levels positively correlate with each other in GBM specimens and are poor prognostic indicators in GBM patients. This work highlights ATF4-dependent fructolysis as a metabolic feature and a potential therapeutic target for GBM. Excessive consumption of fructose contributes to cancer development, but the underlying mechanisms are poorly understood. Here, the authors show that glucose deprivation induces fructolysis through selective activation of ATF4 translation, thereby supporting malignant progression of human glioblastoma.
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