Cited by 141Cancer, Hypoxia, and MetabolismMetabolism, Diabetes, and CancerCancer and biochemical research

Oligomycin-induced bioenergetic adaptation in cancer cells with heterogeneous bioenergetic organization

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Hao, Wenshan, Chang, Chao-Pei Betty, Tsao, Cheng-Chung, Xu, Jun·2010·Journal of Biological Chemistry

Abstract

Cancer cells constantly adapt to oxidative phosphorylation (OXPHOS) suppression resulting from hypoxia or mitochondria defects. Under the OXPHOS suppression, AMP-activated protein kinase (AMPK) regulates global metabolism adjustments, but its activation has been found to be transient. Whether cells can maintain cellular ATP homeostasis and survive beyond the transient AMPK activation is not known. Here, we study the bioenergetic adaptation to the OXPHOS inhibitor oligomycin in a group of cancer cells. We found that oligomycin at 100 ng/ml completely inhibits OXPHOS activity in 1 h and induces various levels of glycolysis gains by 6 h, from which we calculate the bioenergetic organizations of cancer cells. In glycolysis-dominant cells, oligomycin does not induce much energy stress as measured by glycolysis acceleration, ATP imbalance, AMPK activation, AMPK substrate acetyl-CoA carboxylase phosphorylation at Ser(79), and cell growth inhibition. In OXPHOS-dependent LKB1 wild type cells, oligomycin induces 5-8% ATP drops and transient AMPK activation during the initial 1-2 h. After AMPK activation is completed, oligomycin-induced increase of acetyl-CoA carboxylase phosphorylation at Ser(79) is still detected, and cellular ATP is back at preoligomycin treatment levels by sustained elevation of glycolysis. Cell growth, however, is inhibited without an increase in cell death and alteration in cell cycle distribution. In OXPHOS-dependent LKB1-null cells, no AMPK activation by oligomycin is detected, yet cells still show a similar adaptation. We also demonstrate that the adaptation to oligomycin does not invoke activation of hypoxia-induced factor. Our data suggest that cancer cells may grow and survive persistent OXPHOS suppression through an as yet unidentified regulatory mechanism.

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Crossref · 10.1074/jbc.m109.084194

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Authors
Hao, W., Chang, C.-P. B., Tsao, C.-C., & Xu, J.
Affiliations
Wyeth (US)
Corresponding author
Hao, Wenshan
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2010-04
Volume
285
Issue
17
Pages
12647-12654
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2009114717
Cited by
138
References
24
Citations by year
2026: 6 · 2025: 11 · 2024: 12 · 2023: 7 · 2022: 8 · 2021: 11 · 2020: 10 · 2019: 13 · 2018: 8 · 2017: 8 · 2016: 6 · 2015: 3 · 2014: 12 · 2013: 10 · 2012: 8
FWCI
2.31
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • 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
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Cancer and biochemical research
Keywords
oligomycin, cancer cells, oxidative phosphorylation inhibition, AMPK, acetyl-CoA carboxylase, glycolysis, ATP homeostasis, LKB1, hypoxia, energy stress, cell growth inhibition
MeSH terms
AMP-Activated Protein Kinase Kinases, Acetyl-CoA Carboxylase, Adenosine Triphosphate, Dose-Response Relationship, Drug, Enzyme Activation, Glycolysis, Humans, Mitochondria, Neoplasm Proteins, Neoplasms, Oligomycins, Oxidative Phosphorylation, Phosphorylation, Stress, Physiological, Time Factors, Uncoupling Agents, Cell Hypoxia, Protein Serine-Threonine Kinases, Cell Line, Tumor, AMP-Activated Protein Kinases

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