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Study summary · General aging biology & healthspan

How do Krebs cycle intermediates regulate DNA and histone methylation, and what is their epigenetic impact on the aging process?

In one paragraph

Methylation & MTHFR Genetic Testing (Ageing Research Reviews 2014, PMID 24910305) — krebs cycle intermediates can shape the epigenetic landscape of chromatin by regulating DNA and histone methylation. No numeric effect size is reported for Methylation & MTHFR Genetic Testing in the source abstract.

Source: Ageing Research Reviews 2014, PMID 24910305 ↗ · Research map · How Magellan grades evidence · evidence confidence: low

Ageing Research Reviews · 2014 · PMID 24910305 · DOI 10.1016/j.arr.2014.05.004

Plain-English summary written and published by Magellan Longevity · medical review by Gabriel Radu, DO (physiatrist, NPI 1376861765). We summarize what the paper reported — we did not run this study.

The takeaway

Krebs cycle intermediates influence DNA and histone methylation, suggesting a link between metabolism, epigenetics, and aging.

The question

How do Krebs cycle intermediates regulate DNA and histone methylation, and what is their epigenetic impact on the aging process?

What they tested

Age-related disturbances in Krebs cycle function induce stochastic epigenetic changes in chromatin structures, which promote the aging process.

How they did it

This study is a review of existing literature concerning the epigenetic mechanisms by which Krebs cycle intermediates control DNA and histone methylation.

What they found

Krebs cycle intermediates can shape the epigenetic landscape of chromatin by regulating DNA and histone methylation. Specifically, 2-oxoglutarate (α-ketoglutarate) is an obligatory substrate for 2-oxoglutarate-dependent dioxygenases (2-OGDO), which include major enzymes for DNA and histone demethylation (TETs and JmjC demethylases). Conversely, succinate and fumarate, also Krebs cycle intermediates, are potent inhibitors of 2-OGDO enzymes. This balance of Krebs cycle reactions can affect the level of DNA and histone methylation and thus control gene expression.

What it means

Krebs cycle intermediates regulate DNA and histone methylation through their involvement with 2-oxoglutarate-dependent dioxygenases. Disturbances in Krebs cycle function may lead to epigenetic changes that contribute to the aging process.

Limitations

This is a review article and does not present new experimental data. The proposed link between age-related Krebs cycle disturbances and stochastic epigenetic changes is a hypothesis based on existing evidence.

“Krebs cycle intermediates can shape the epigenetic landscape of chromatin by regulating DNA and histone methylation.”— from the published abstract, Ageing Research Reviews 2014

The paper at a glance

TitleKrebs cycle intermediates regulate DNA and histone methylation: epigenetic impact on the aging process
JournalAgeing Research Reviews
Year2014
PMID24910305 ↗
DOI10.1016/j.arr.2014.05.004 ↗
TopicGeneral aging biology & healthspan

Read the source: PubMed record (authors, abstract, full citation) ↗ · Publisher via doi.org ↗

Where Magellan uses this paper

This citation sits behind the evidence grade on the pages below. Grades are set from the research and are independent of affiliate commissions.

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AKG sits at the intersection of energy metabolism and epigenetic regulation: Krebs-cycle intermediates such as AKG act as cofactors for the enzymes that add and remove methyl marks on DNA and histones.

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Cite this page

These citations point at this summary. To cite the original paper with its full author list, use the PubMed record or doi.org.

APA
Magellan Longevity. (2026). How do Krebs cycle intermediates regulate DNA and histone methylation, and what is their epigenetic impact on the aging process? [Plain-English summary of Ageing Research Reviews 2014, PMID 24910305, DOI 10.1016/j.arr.2014.05.004]. Magellan Longevity. https://magellanlongevity.com/study/akg_krebs.html
BibTeX
@misc{magellan_akg_krebs, title = {How do Krebs cycle intermediates regulate DNA and histone methylation, and what is their epigenetic impact on the aging process?}, author = {{Magellan Longevity}}, year = {2026}, howpublished = {\url{https://magellanlongevity.com/study/akg_krebs.html}}, note = {Plain-English summary of PubMed PMID 24910305; DOI 10.1016/j.arr.2014.05.004; Ageing Research Reviews 2014. Reviewed by Gabriel Radu, DO}, urldate = {2026-08-11} }
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How this summary was made. Every section above restates what the published abstract of PMID 24910305 reports — the question, the design, the numbers, the authors’ own conclusion and their stated limitations. We do not add claims the paper did not make, and we keep negative and no-effect findings in. Magellan’s evidence grades are set from research like this and never from affiliate commissions.

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