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首页> 外文期刊>Cell metabolism >Pan-Cancer Metabolic Signature Predicts Co-Dependency on Glutaminase and De Novo Glutathione Synthesis Linked to a High-Mesenchymal Cell State
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Pan-Cancer Metabolic Signature Predicts Co-Dependency on Glutaminase and De Novo Glutathione Synthesis Linked to a High-Mesenchymal Cell State

机译:泛癌代谢签名预测谷氨酰胺酶和De Novo谷胱甘肽合成与高间充质细胞状态相关的共依赖性

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摘要

The enzyme glutaminase (GLS1) is currently in clinical trials for oncology, yet there are no clear diagnostic criteria to identify responders. The evaluation of 25 basal breast lines expressingGLS1, predominantly through its splice isoformGAC, demonstrated that only GLS1-dependent basal B lines required it for maintainingde novoglutathione synthesis in addition to mitochondrial bioenergetics. Drug sensitivity profiling of 407 tumor lines with GLS1 and gamma-glutamylcysteine synthetase (GCS) inhibitors revealed a high degree of co-dependency on both enzymes across indications, suggesting that redox balance is a key function of GLS1 in tumors. To leverage these findings, we derived a pan-cancer metabolic signature predictive of GLS1/GCS co-dependency and validated itin?vivousing four lung patient-derived xenograft models, revealing the additional requirement for expression ofGACabove a threshold (log2RPKM?+ 1?≥ 4.5, where RPKM is reads per kilobase per million mapped reads). Analysis of the pan-TCGA dataset with our signature identified multiple indications, including mesenchymal tumors, as putative responders to GLS1 inhibitors.
机译:酶谷氨酰胺酶(GLS1)目前处于肿瘤学中的临床试验,但没有明确的诊断标准来识别响应者。评估25根基础乳清乳线ExpressingGls1,主要通过其接头异常,证明只有GLS1依赖性基础B线,除了线粒体生物植物学外,还需要其用于维持Novoglutathione合成。 407种肿瘤系具有GLS1和γ-谷氨酸琥珀酰基合成酶(GCS)抑制剂的药物敏感性分析显示出对两种酶的高度相同的共依赖性,表明氧化还原平衡是GLS1在肿瘤中的关键功能。为了利用这些发现,我们衍生出GLS1 / GCS共同依赖性的泛癌代谢特征,并验证了它?促进四种肺患者衍生的异种移植模型,揭示了GACABOVE阈值的额外要求(LOG2RPKM?+ 1?≥ 4.5,其中RPKM每千次映射读数读取每千级读数)。通过我们的签名分析Pan-TCGA数据集确定了多种适应症,包括间充质肿瘤,作为GLS1抑制剂的推定响应者。

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