Cited by 2,108Cancer, Hypoxia, and MetabolismEar and Head TumorsFerroptosis and cancer prognosis

The DOI matches its Crossref record; 45 of the 47 references it cites were found in a registry or an index; 1 of the 7 sources its claims cite were checked for support.

Succinate links TCA cycle dysfunction to oncogenesis by inhibiting HIF-α prolyl hydroxylase

Open access

Abstract

Succinate links TCA cycle dysfunction to oncogenesis by inhibiting HIF-α prolyl hydroxylase

Overview

AI snapshot

Written from the paper’s full text.

TL;DR

In HEK293 cells, knocking down the SDHD subunit of succinate dehydrogenase caused succinate to accumulate and inhibited HIF-α prolyl hydroxylases, stabilizing HIF-1α under normoxic conditions. This provides a mechanism linking TCA cycle dysfunction to vascular tumor phenotypes without VHL mutation.

Key findings

  • SDHD-targeting siRNA reduced SDH activity and raised cellular succinate from about 121 µM in controls to about 447 µM (Di3) and 441 µM (Di4); no significant change was seen in DHE oxidation or glutathione redox state, arguing against ROS as the mediator.
  • SDH inhibition induced HIF-1α protein under normoxia, produced about a 3-fold increase in HRE-luciferase reporter activity, induced VEGF mRNA to levels comparable with hypoxia or CoCl₂, and increased BNIP3; HIF-2α induction was less pronounced.
  • Succinate inhibited PHD activity in vitro in a dose-dependent manner, with an IC50 reported as 0.5 mM, and the membrane-permeable succinate derivative DMS (20 mM, 48 hr) elevated HIF-1α and caused nuclear HIF-1α accumulation under normoxia.
  • In SDH-inhibited cells, pVHL binding to the ODD domain was reduced, consistent with decreased ODD hydroxylation; the proposed model is that mitochondrial succinate exits to the cytosol, inhibits PHD, stabilizes HIF-1α, and drives angiogenesis, metastasis, and glycolytic gene expression.

Methods

  • HEK293 cells were transfected with scrambled siRNA or SDHD-targeting siRNA (Di3 or Di4); SDH activity was measured by succinate-DCIP oxidoreductase, succinate by GC-MS with deuterated succinic acid as reference, and ROS/redox state by DHE staining and glutathione assays.
  • HIF readouts included Western blot for HIF-1α, HIF-2α, and BNIP3, RT-PCR for VEGF, and an HRE-luciferase reporter; PHD activity was assayed in vitro using HA-tagged ODD and cell extracts, and pVHL binding was assessed by immunoprecipitation and far Western blot.
  • The study is cell-culture based, with no patient tumor samples or in vivo tumor models described.

Limitations

  • Stated in the paper: DMS uptake, conversion to succinate, and metabolism are unknown; different cell types may have different thresholds and mechanisms of HIF activation; succinate may also modulate FIH; and the ROS findings conflict with C. elegans mev-1 observations, possibly due to species or mutation differences.
  • Evident from the text: conclusions rely on HEK293 cells and siRNA knockdown rather than SDH-mutant tumors, transfection efficiency was about 50% so populations were mixed, and no in vivo tumor growth or patient tumor validation was performed; elevated succinate in human SDH-mutant tumors is cited as personal communication.

Model-written summary. Check it against the paper before relying on it.

Integrity signals

Registry

Crossref · 10.1016/j.ccr.2004.11.022

Cites

45 of 45 references verified0 citation errors · 0 not checkable

Statistics

Nothing to recompute.

Verification

Claims the paper makes

1 of 7 cited sources checked · 1 supported · 0 flagged

Show all 19 claims

  • It may state two separate claims as one. 3
  • The quote only partly states this claim. 1
  • Probably not a substantial claim. 2
6 of 6
  • The paper relies on this without support.

    Succinate moves freely between the mitochondria and the cytosol via the dicarboxylic acid translocator in the mitochondrial inner membrane and the voltage-dependent anion channel (VDAC/porin) in the mitochondrial outer membrane.

    “Succinate moves freely between the mitochondria and the cytosol via the dicarboxylic acid translocator in the mitochondrial inner membrane and the voltage-dependent anion channel (VDAC/porin) in the mitochondrial outer membrane.”
  • The paper relies on this without support.

    Succinate is the substrate for SDH in mitochondria and a product of PHD in the cytosol.

    “succinate, the substrate for SDH in mitochondria and a product of PHD in the cytosol.”
2 of 2

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Self-check

Percentages, sums and reported differences re-computed from the paper’s own numbers.

Each contradiction between two passages listed here was confirmed by an independent check.

  • Di3 microscopy panel is described both with and without pVHL

    Minor

    The Figure 6A legend identifies panel v as the Di3 condition without pVHL. The results text instead describes the Di3 and Di4 comparisons in panels iv-vi as experiments cotransfected with HA-tagged pVHL, so the Di3 condition is inconsistent between the two descriptions.

1 of 1

Citations

Cites

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Show all 47 references

2 of the 47 references couldn’t be matched to a known paper.

Research works printed but not linked: 1

  1. Beasley, 2002, Hypoxia-inducible factors HIF-1α and HIF-2α in head and neck cancer, Cancer Res., 62, 2493

Cited by

Sorted by citations

Items 401–500 of 2,106

Metadata

Authors
Selak, M. A., Armour, S. M., MacKenzie, E. D., Boulahbel, H., Watson, D. G., Mansfield, K. D., Pan, Y., Simon, M. C., Thompson, C. B., & Gottlieb, E.
Affiliations
  • Cancer Research UK (GB)
  • University of Pennsylvania (US)
  • University of Strathclyde (GB)
Corresponding author
Gottlieb, Eyal
Venue
Cancer Cell
Publisher
Elsevier BV
Published
2005-01
Volume
7
Issue
1
Pages
77-85
ISSN
1535-6108 (ISSN-L)
OpenAlex
W2057199368
Cited by
2,108
References
47
Citations by year
2026: 110 · 2025: 115 · 2024: 97 · 2023: 97 · 2022: 116 · 2021: 139 · 2020: 128 · 2019: 123 · 2018: 93 · 2017: 107 · 2016: 110 · 2015: 107 · 2014: 108 · 2013: 109 · 2012: 86
FWCI
26.39
Type
journal article
Language
en
Open access
Locations
  • Cancer Cell (publishedVersion)
  • PubMed (publishedVersion)
  • Strathprints: The University of Strathclyde institutional repository (University of Strathclyde) (acceptedVersion)
  • ENLIGHTEN (Jurnal Bimbingan dan Konseling Islam) (submittedVersion)
Funders
Beatson Institute for Cancer Research
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Cancer, Hypoxia, and Metabolism
  • Health Sciences › Medicine › Oncology › Ear and Head Tumors
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cancer Research › Ferroptosis and cancer prognosis
Keywords
succinic acid, succinate dehydrogenase, HIF-1α, prolyl hydroxylase, mitochondrial dysfunction, tumor suppressor proteins, carcinogenesis, VHL, tumor angiogenesis, fumarate hydratase
MeSH terms
Animals, Cell Line, Cell Transformation, Neoplastic, Citric Acid Cycle, Enzyme Activation, Humans, Mitochondria, Oncogenes, Procollagen-Proline Dioxygenase, Succinate Dehydrogenase, Transcription Factors, Signal Transduction, Gene Expression Regulation, Enzymologic, Reactive Oxygen Species, Succinic Acid, Tumor Suppressor Proteins, RNA, Small Interfering, Ubiquitin-Protein Ligases, Von Hippel-Lindau Tumor Suppressor Protein, Hypoxia-Inducible Factor 1, alpha Subunit

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