Cited by 81Cancer, Lipids, and MetabolismLipid metabolism and biosynthesisCancer, Hypoxia, and Metabolism

Cancer cells depend on environmental lipids for proliferation when electron acceptors are limited

Open access
Li, Zhaoqi, Ji, Brian W., Dixit, Purushottam D., Tchourine, Konstantine, Lien, Evan C., Hosios, Aaron M., Abbott, Keene L., Rutter, Justine C. +5 more·2022·Nature Metabolism

Published version of a preprint

Abstract

Production of oxidized biomass, which requires regeneration of the cofactor NAD+, can be a proliferation bottleneck that is influenced by environmental conditions. However, a comprehensive quantitative understanding of metabolic processes that may be affected by NAD+ deficiency is currently missing. Here, we show that de novo lipid biosynthesis can impose a substantial NAD+ consumption cost in proliferating cancer cells. When electron acceptors are limited, environmental lipids become crucial for proliferation because NAD+ is required to generate precursors for fatty acid biosynthesis. We find that both oxidative and even net reductive pathways for lipogenic citrate synthesis are gated by reactions that depend on NAD+ availability. We also show that access to acetate can relieve lipid auxotrophy by bypassing the NAD+ consuming reactions. Gene expression analysis demonstrates that lipid biosynthesis strongly anti-correlates with expression of hypoxia markers across tumor types. Overall, our results define a requirement for oxidative metabolism to support biosynthetic reactions and provide a mechanistic explanation for cancer cell dependence on lipid uptake in electron acceptor-limited conditions, such as hypoxia.

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  • Electron shuttles facilitate oxidation of cytosolic NADH, which is required to support continued glycolysis and de novo synthesis of serine and lipids.

    “Beyond supporting net NADH “import” into the mitochondria, these shuttles also facilitate the oxidation of cytosolic NADH, which is required to support continued glycolysis and the de novo synthesis of serine and lipids (101, 102, 103).”

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Research works printed but not linked: 5

  1. [21]Price NC & Stevens L Fundamentals of Enzymology. (Oxford University Press, 2000).
  2. [55]Harris AL Hypoxia — a key regulatory factor in tumour growth. Nature Reviews Cancer 2, 38– 47 (2002). 11902584
  3. [64]Birsoy K An Essential Role of the Mitochondrial Electron Transport Chain in Cell Proliferation Is to Enable Aspartate Synthesis. Cell 162, 540– 551 (2015). 26232224 PMC4522279
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Authors
Li, Z., Ji, B. W., Dixit, P. D., Tchourine, K., Lien, E. C., Hosios, A. M., Abbott, K. L., Rutter, J. C., Westermark, A. M., Gorodetsky, E. F., Sullivan, L. B., Vander Heiden, M. G., & Vitkup, D.
Affiliations
  • Koch Institute for Integrative Cancer Research At MIT (US)
  • University of California San Diego (US)
  • University of Florida (US)
  • Columbia University (US)
  • Harvard University (US)
  • Fred Hutch Cancer Center (US)
Corresponding author
Vitkup, Dennis
Venue
Nature Metabolism
Published
2022-06-23
Volume
4
Issue
6
Pages
711-723
ISSN
2522-5812 (ISSN-L)
OpenAlex
W4283331833
Cited by
81
References
91
Citations by year
2026: 15 · 2025: 22 · 2024: 22 · 2023: 15 · 2022: 7
FWCI
6.94
Type
journal article
Language
en
Open access
Locations
  • Nature Metabolism (publishedVersion)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
U.S. Department of Health & Human Services | NIH | National Institute of General Medical Sciences (T32GM007753)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer, Lipids, and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Biochemistry › Lipid metabolism and biosynthesis
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer, Hypoxia, and Metabolism
Keywords
tumor cell proliferation, NAD+ regeneration, lipogenesis, fatty acid synthesis, hypoxia, acetate uptake, oxidative metabolism, cancer metabolism
MeSH terms
Hypoxia, Electrons, Humans, Lipids, NAD, Neoplasms, Cell Proliferation

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