Cited by 44Endoplasmic Reticulum Stress and DiseaseCancer, Hypoxia, and MetabolismMetabolism, Diabetes, and Cancer

ATF4-induced warburg metabolism drives over-proliferation in Drosophila

Open access
Sorge, Sebastian, Theelke, Jonas, Yildirim, Kerem, Hertenstein, Helen, McMullen, Ellen, Müller, Stephan, Altbürger, Christian, Schirmeier, Stefanie +1 more·2020·Cell Reports

Abstract

The mitochondrial electron transport chain (ETC) enables essential metabolic reactions; nonetheless, the cellular responses to defects in mitochondria and the modulation of signaling pathway outputs are not understood. We show that Notch signaling and ETC attenuation via knockdown of COX7a induces massive over-proliferation. The tumor-like growth is caused by a transcriptional response through the eIF2α-kinase PERK and ATF4, which activates the expression of metabolic enzymes, nutrient transporters, and mitochondrial chaperones. We find this stress adaptation to be beneficial for progenitor cell fitness, as it renders cells sensitive to proliferation induced by the Notch signaling pathway. Intriguingly, over-proliferation is not caused by transcriptional cooperation of Notch and ATF4, but it is mediated in part by pH changes resulting from the Warburg metabolism induced by ETC attenuation. Our results suggest that ETC function is monitored by the PERK-ATF4 pathway, which can be hijacked by growth-promoting signaling pathways, leading to oncogenic pathway activity.

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Crossref · 10.1016/j.celrep.2020.107659

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Authors
Sorge, S., Theelke, J., Yildirim, K., Hertenstein, H., McMullen, E., Müller, S., Altbürger, C., Schirmeier, S., & Lohmann, I.
Affiliations
  • Heidelberg University (DE)
  • University of Münster (DE)
  • University of Freiburg (DE)
Corresponding author
Lohmann, Ingrid
Venue
Cell Reports
Publisher
Elsevier BV
Published
2020-05
Volume
31
Issue
7
Pages
107659
ISSN
2211-1247 (ISSN-L)
OpenAlex
W3026560547
Cited by
44
References
70
Citations by year
2026: 6 · 2025: 10 · 2024: 7 · 2023: 10 · 2022: 7 · 2021: 4
FWCI
2.62
Type
journal article
Language
en
Open access
Locations
  • Cell Reports (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • Deutsche Forschungsgemeinschaft (Excellence Cluster CellNetworks, ZUK 40/2010-3009262, CellNetworks/EcTop6)
  • Universität Heidelberg
  • Heidelberg Biosciences International Graduate School
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Endoplasmic Reticulum Stress and Disease
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer, Hypoxia, and Metabolism
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Metabolism, Diabetes, and Cancer
Keywords
ATF4, mitochondrial electron transport chain, Notch signaling, PERK-eIF2α pathway, Drosophila, mitochondrial stress response, pH change
MeSH terms
Warburg Effect, Oncologic, Animals, Cells, Cultured, Electron Transport Complex IV, Drosophila, Drosophila melanogaster, Electron Transport, Female, Male, Stem Cells, Transcription Factors, eIF-2 Kinase, Drosophila Proteins, Animals, Genetically Modified, Cell Proliferation, Activating Transcription Factor 4, Receptors, Notch

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