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题名: MYC-driven inhibition of the glutamate-cysteine ligase promotes glutathione depletion in liver cancer
作者: Anderton, Brittany1, 2;  Camarda, Roman1, 2;  Balakrishnan, Sanjeev1, 2;  Balakrishnan, Asha1, 2, 3;  Kohnz, Rebecca A.4;  Lim, Lionel1, 2;  Evason, Kimberley J.5, 6;  Momcilovic, Olga1, 2;  Kruttwig, Klaus1, 2;  Huang, Qiang7;  Xu, Guowang7;  Nomura, Daniel K.4;  Goga, Andrei1, 2
关键词: cancer ;  glutathione ;  metabolism ;  miRNA ;  MYC
刊名: EMBO REPORTS
发表日期: 2017-04-01
DOI: 10.15252/embr.201643068
卷: 18, 页:569-585
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Life Sciences & Biomedicine
类目[WOS]: Biochemistry & Molecular Biology ;  Cell Biology
研究领域[WOS]: Biochemistry & Molecular Biology ;  Cell Biology
英文摘要: How MYC reprograms metabolism in primary tumors remains poorly understood. Using integrated gene expression and metabolite profiling, we identify six pathways that are coordinately deregulated in primary MYC-driven liver tumors: glutathione metabolism; glycine, serine, and threonine metabolism; aminoacylt-RNA biosynthesis; cysteine and methionine metabolism; ABC transporters; and mineral absorption. We then focus our attention on glutathione (GSH) and glutathione disulfide (GSSG), as they are markedly decreased in MYC-driven tumors. We find that fewer glutamine-derived carbons are incorporated into GSH in tumor tissue relative to non-tumor tissue. Expression of GCLC, the rate-limiting enzyme of GSH synthesis, is attenuated by the MYC-induced microRNA miR-18a. Inhibition of miR-18a in vivo leads to increased GCLC protein expression and GSH abundance in tumor tissue. Finally, MYC-driven liver tumors exhibit increased sensitivity to acute oxidative stress. In summary, MYC-dependent attenuation of GCLC by miR-18a contributes to GSH depletion in vivo, and low GSH corresponds with increased sensitivity to oxidative stress in tumors. Our results identify new metabolic pathways deregulated in primary MYC tumors and implicate a role for MYC in regulating a major antioxidant pathway downstream of glutamine.
关键词[WOS]: GENE-EXPRESSION SIGNATURE ;  C-MYC ;  HEPATOCELLULAR-CARCINOMA ;  OXIDATIVE STRESS ;  HUMAN HEPATOCARCINOGENESIS ;  METABOLISM ;  CELLS ;  TUMORS ;  PROGRESSION ;  PROTEIN
语种: 英语
WOS记录号: WOS:000399327500011
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/152327
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Univ Calif San Francisco, Dept Cell & Tissue Biol, San Francisco, CA 94143 USA
2.Univ Calif San Francisco, Dept Med, San Francisco, CA 94143 USA
3.Hannover Med Sch, TWINCORE, Ctr Expt & Clin Infect Res, Dept Gastroenterol Hepatol & Endocrinol, Hannover, Germany
4.Univ Calif Berkeley, Dept Nutr Sci & Toxicol, Berkeley, CA 94720 USA
5.Univ Utah, Dept Pathol, Salt Lake City, UT USA
6.Univ Utah, Huntsman Canc Inst, Salt Lake City, UT USA
7.Chinese Acad Sci, Dalian Inst Chem Phys, Key Lab Separat Sci Analyt Chem, Dalian, Peoples R China

Recommended Citation:
Anderton, Brittany,Camarda, Roman,Balakrishnan, Sanjeev,et al. MYC-driven inhibition of the glutamate-cysteine ligase promotes glutathione depletion in liver cancer[J]. EMBO REPORTS,2017,18:569-585.
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