Hormetic fasting extended lifespan in C. elegans via H3K27ac
In the nematode Caenorhabditis elegans, hormetic fasting extended lifespan; the abstract attributes this to H3K27ac-driven reprogramming that boosts lipid catabolism and lifelong antioxidant defenses. [1]
Automatic summary · not editorially reviewed
The key findings
Hormetic nutrient stress extended lifespan in Caenorhabditis elegans, and H3K27ac is identified as a key driver of the transcriptional adaptation. [1]
Stress-induced H3K27ac activates lifelong antioxidant defenses that reduce reactive oxygen species from stress-induced fatty acid oxidation and their accumulation during aging. [1]
Induced H3K27ac at metabolic genes, mediated by PHA-4/FOXA, NHR-49/HNF4 and NPP-16/NUP50, is described as crucial for lifespan extension under hormetic nutrient stress in C. elegans. [1]
The source at a glance
- Study type / format
- Abstract of a mechanistic study in C. elegans
- Population / context
- Caenorhabditis elegans nematodes under hormetic nutrient stress
- Summary based on
- Study abstract
- Original publication
- June 8, 2026
Hormetic fasting and lifespan in C. elegans
The abstract describes hormetic stress as exposure to low levels of environmental challenges, which fosters later stress resistance and healthy aging. In this study, hormetic nutrient stress in the nematode Caenorhabditis elegans was linked to lifespan extension. The authors identify histone H3 lysine 27 acetylation (H3K27ac) as a key driver of the transcriptional adaptation to hormetic fasting.
Supporting source [1]
Lipid catabolism and antioxidant defense via H3K27ac
According to the abstract, H3K27ac first enhances lipid catabolism to provide alternative energy sources. Stress-induced H3K27ac also activates lifelong antioxidant defenses, which reduce reactive oxygen species (ROS) produced by stress-induced fatty acid oxidation and their accumulation during aging. Induced H3K27ac at metabolic genes is described as mediated by the pioneer factor PHA-4/FOXA, the cooperating transcription factor NHR-49/HNF4 and the nucleoporin 50 (NPP-16/NUP50).
Supporting source [1]
H3K27ac as switch for fasting longevity in worms
The abstract states that this induced H3K27ac at metabolic genes is crucial for lifespan extension under hormetic nutrient stress in Caenorhabditis elegans. The authors conclude that H3K27ac acts as a key transcriptional switch linking nutrient status to transcriptomic reprogramming, underpinning the longevity of hormetic fasting by orchestrating lipid catabolism and antioxidant defenses. These are mechanistic findings in a nematode model, not evidence of human lifespan benefits.
Supporting source [1]
How to interpret this
This explainer is based only on the abstract; the full text was not reviewed. The work concerns the nematode Caenorhabditis elegans, so the described mechanisms and lifespan effects are not evidence of human lifespan benefits.
Based on the study abstract; the full paper, tables and supplementary data were not reviewed.
Source & supporting passages
Zhou Y, Ahsan FM, Li S, Song M, Rotti JF, Yerevanian A, Shen Y, Soukas AA. · europepmc.org · June 8, 2026