We are analyzing https://link.springer.com/article/10.1007/s13277-014-1784-5.

Title:
Quantitative metabolome analysis profiles activation of glutaminolysis in glioma with IDH1 mutation | Tumor Biology
Description:
Isocitrate dehydrogenase 1 (IDH1), which localizes to the cytosol and peroxisomes, catalyzes the oxidative decarboxylation of isocitrate to α-ketoglutarate (α-KG) and in parallel converts NADP+ to NADPH. IDH1 mutations are frequently detected in grades 2–4 gliomas and in acute myeloid leukemias (AML). Mutations of IDH1 have been identified at codon 132, with arginine being replaced with histidine in most cases. Mutant IDH1 gains novel enzyme activity converting α-KG to d-2-hydroxyglutarate (2-HG) which acts as a competitive inhibitor of α-KG. As a result, the activity of α-KG-dependent enzyme is reduced. Based on these findings, 2-HG has been proposed to be an oncometabolite. In this study, we established HEK293 and U87 cells that stably expressed IDH1-WT and IDH1-R132H and investigated the effect of glutaminase inhibition on cell proliferation with 6-diazo-5-oxo-l-norleucine (DON). We found that cell proliferation was suppressed in IDH1-R132H cells. The addition of α-KG restored cell proliferation. The metabolic features of 33 gliomas with wild type IDH1 (IDH1-WT) and with IDH1-R132H mutation were examined by global metabolome analysis using capillary electrophoresis time-of-flight mass spectrometry (CE-TOFMS). We showed that the 2-HG levels were highly elevated in gliomas with IDH1-R132H mutation. Intriguingly, in gliomas with IDH1-R132H, glutamine and glutamate levels were significantly reduced which implies replenishment of α-KG by glutaminolysis. Based on these results, we concluded that glutaminolysis is activated in gliomas with IDH1-R132H mutation and that development of novel therapeutic approaches targeting activated glutaminolysis is warranted.
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pubmed, article, google, scholar, idh, cas, cells, idhrh, central, cell, cancer, mutation, idhwt, αkg, glioma, mutations, analysis, gliomas, nature, ohka, expressing, metabolome, glutaminolysis, access, doinature, privacy, cookies, content, research, fumiharu, ito, motomura, kato, isocitrate, dehydrogenase, res, japan, supplemental, figure, pptx, information, publish, search, tumor, activation, soga, mutant, glutamine, metabolism, science,

Topics {✒️}

month download article/chapter keiko kato & tomoyoshi soga common glioma-derived mutation 6-diazo-5-oxo-l-norleucine global metabolome analysis quantitative metabolome profiling stably expressed idh1-wt α-kg-dependent enzyme integrated genomic analysis cells expressing idh1-wt parsons dw analyzed α-kg level full article pdf tumor-suppressive microrna-326 cancer metabolism article ohka privacy choices/manage cookies expressing idh1-wt human astrocytoma progression mgmt promoter methylation author information authors idh1-r132h cells compared dang cv m2 splice isoform electronic supplementary material fumiharu ohka idh1-r132h mutation cell metabolism pyruvate kinase m2 metabolic features idh1-wt cells cancer biology cell growth rate comprehensive metabolomic analysis exogenous idh1-wt glioma-derived mutations glioma hypermethylator phenotype capillary electrophoresis time flight mass spectrometry β-oxidation due α-kg level stomach cancer microenvironment adding α-kg glutamine deprivation condition european economic area parallel converts nadp+ acute myeloid leukemias molecular sweet tooth vander heiden mg induce hif-1alpha

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         headline:Quantitative metabolome analysis profiles activation of glutaminolysis in glioma with IDH1 mutation
         description: Isocitrate dehydrogenase 1 (IDH1), which localizes to the cytosol and peroxisomes, catalyzes the oxidative decarboxylation of isocitrate to α-ketoglutarate (α-KG) and in parallel converts NADP+ to NADPH. IDH1 mutations are frequently detected in grades 2–4 gliomas and in acute myeloid leukemias (AML). Mutations of IDH1 have been identified at codon 132, with arginine being replaced with histidine in most cases. Mutant IDH1 gains novel enzyme activity converting α-KG to d-2-hydroxyglutarate (2-HG) which acts as a competitive inhibitor of α-KG. As a result, the activity of α-KG-dependent enzyme is reduced. Based on these findings, 2-HG has been proposed to be an oncometabolite. In this study, we established HEK293 and U87 cells that stably expressed IDH1-WT and IDH1-R132H and investigated the effect of glutaminase inhibition on cell proliferation with 6-diazo-5-oxo-l-norleucine (DON). We found that cell proliferation was suppressed in IDH1-R132H cells. The addition of α-KG restored cell proliferation. The metabolic features of 33 gliomas with wild type IDH1 (IDH1-WT) and with IDH1-R132H mutation were examined by global metabolome analysis using capillary electrophoresis time-of-flight mass spectrometry (CE-TOFMS). We showed that the 2-HG levels were highly elevated in gliomas with IDH1-R132H mutation. Intriguingly, in gliomas with IDH1-R132H, glutamine and glutamate levels were significantly reduced which implies replenishment of α-KG by glutaminolysis. Based on these results, we concluded that glutaminolysis is activated in gliomas with IDH1-R132H mutation and that development of novel therapeutic approaches targeting activated glutaminolysis is warranted.
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      description: Isocitrate dehydrogenase 1 (IDH1), which localizes to the cytosol and peroxisomes, catalyzes the oxidative decarboxylation of isocitrate to α-ketoglutarate (α-KG) and in parallel converts NADP+ to NADPH. IDH1 mutations are frequently detected in grades 2–4 gliomas and in acute myeloid leukemias (AML). Mutations of IDH1 have been identified at codon 132, with arginine being replaced with histidine in most cases. Mutant IDH1 gains novel enzyme activity converting α-KG to d-2-hydroxyglutarate (2-HG) which acts as a competitive inhibitor of α-KG. As a result, the activity of α-KG-dependent enzyme is reduced. Based on these findings, 2-HG has been proposed to be an oncometabolite. In this study, we established HEK293 and U87 cells that stably expressed IDH1-WT and IDH1-R132H and investigated the effect of glutaminase inhibition on cell proliferation with 6-diazo-5-oxo-l-norleucine (DON). We found that cell proliferation was suppressed in IDH1-R132H cells. The addition of α-KG restored cell proliferation. The metabolic features of 33 gliomas with wild type IDH1 (IDH1-WT) and with IDH1-R132H mutation were examined by global metabolome analysis using capillary electrophoresis time-of-flight mass spectrometry (CE-TOFMS). We showed that the 2-HG levels were highly elevated in gliomas with IDH1-R132H mutation. Intriguingly, in gliomas with IDH1-R132H, glutamine and glutamate levels were significantly reduced which implies replenishment of α-KG by glutaminolysis. Based on these results, we concluded that glutaminolysis is activated in gliomas with IDH1-R132H mutation and that development of novel therapeutic approaches targeting activated glutaminolysis is warranted.
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