Cited by 70Cancer, Hypoxia, and MetabolismMicrobial Metabolic Engineering and BioproductionMetabolomics and Mass Spectrometry Studies

Spatial-fluxomics provides a subcellular-compartmentalized view of reductive glutamine metabolism in cancer cells

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Lee, Won Dong, Mukha, Dzmitry, Aizenshtein, Elina, Shlomi, Tomer·2019·Nature Communications

Abstract

The inability to inspect metabolic activities within subcellular compartments has been a major barrier to our understanding of eukaryotic cell metabolism. Here, we describe a spatial-fluxomics approach for inferring metabolic fluxes in mitochondria and cytosol under physiological conditions, combining isotope tracing, rapid subcellular fractionation, LC-MS-based metabolomics, computational deconvolution, and metabolic network modeling. Applied to study reductive glutamine metabolism in cancer cells, shown to mediate fatty acid biosynthesis under hypoxia and defective mitochondria, we find a previously unappreciated role of reductive IDH1 as the sole net contributor of carbons to fatty acid biosynthesis under standard normoxic conditions in HeLa cells. In murine cells with defective SDH, we find that reductive biosynthesis of citrate in mitochondria is followed by a reversed CS activity, suggesting a new route for supporting pyrimidine biosynthesis. We expect this spatial-fluxomics approach to be a highly useful tool for elucidating the role of metabolic dysfunction in human disease.

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  • CS reversibility has been observed in mammalian cells in the context of SDH deficiency, where reductive glutamine metabolism produces citrate and citrate-derived OAA that can sustain biosynthesis.

    “Even CS may reverse: CS reversibility, which occurs in prokaryotes under high CO2 conditions (see aforementioned), has been observed in mammalian cells in the context of SDH deficiency in which reductive glutamine metabolism produces citrate and, strikingly, citrate-derived OAA that can be used to sustain biosynthesis (132).”

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Authors
Lee, W. D., Mukha, D., Aizenshtein, E., & Shlomi, T.
Affiliations
Technion – Israel Institute of Technology (IL)
Corresponding author
Shlomi, Tomer
Venue
Nature Communications
Published
2019-03-22
Volume
10
Issue
1
Pages
1351-1351
ISSN
2041-1723 (ISSN-L)
OpenAlex
W2924911015
Cited by
70
References
68
Citations by year
2026: 7 · 2025: 2 · 2024: 6 · 2023: 12 · 2022: 18 · 2021: 10 · 2020: 11 · 2019: 4
FWCI
3.39
Type
journal article
Language
en
Open access
Locations
  • Nature Communications (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
H2020 European Research Council (714738)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer, Hypoxia, and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Microbial Metabolic Engineering and Bioproduction
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolomics and Mass Spectrometry Studies
Keywords
cancer metabolism, subcellular compartmentalization, isotope tracing, subcellular fractionation, fatty acid synthesis, hypoxia, pyrimidine synthesis, succinate dehydrogenase deficiency, HeLa cells, metabolic network modeling
MeSH terms
Animals, Carbon Isotopes, Cell Compartmentation, Citrate (si)-Synthase, Citric Acid Cycle, Cytosol, Glutamine, HeLa Cells, Humans, Isocitrate Dehydrogenase, Mitochondria, Neoplasms, Subcellular Fractions, Succinate Dehydrogenase, Cell Hypoxia, Citric Acid, Mice, Metabolome, Metabolic Flux Analysis

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