PTEN-deficient cells prefer glutamine for metabolic synthesis

• 来源期刊: 生物化学与生物物理学报（英文版）
• 关键词: metabolomics metabolic flux analysis CE-MS PTEN Gln addiction
• 年，卷（期）: 2020,（3）
• 页码范围: 251-258
• 页数: 8页
• 语种: 英文
• DOI: 10.1093/abbs/gmz163

摘要

PTEN loss-of-function mutations frequently occur in gliomas and lead to poor overall survival.PTEN deficiency induces metabolic reprogramming,which may provide therapeutic targets.PTEN is known to impact the Warburg effect and glutaminolysis.To uncover essential glutaminerelated metabolic changes specific in PTEN-deficient cells and thus provide potential therapeutic targets,we performed capillary electrophoresis-mass spectrometry-based metabolomics analysis and metabolic flux analysis under different glutamine culture conditions and PTEN alteration status.Glu,Asn,Gly,Ala,and 1-methylnicotinamide were decreased in PTEN-deficient cells under normal culture conditions.Meanwhile,under Gln-deprived culture conditions,Glu,citrate,and UTP synthesis were reduced and acetyl carnitine was increased in PTEN-deficient cells.The reliance on Gln was increased for metabolic intermediates synthesis but decreased for energy production in PTEN-deficient cells.However,the reliance on Gln for UTP synthesis cannot be targeted due to anaplerotic synthesis of UTP from other sources.How to target these metabolic addictions needs further research.