Gene toolbox for biological age in gilthead sea bream under aquaculture stressors
In gilthead sea bream, a muscle gene set previously linked to age showed older-like expression after heat or crowding with low oxygen, and younger-like patterns after cold or certain feeding changes; the abstract reports preliminary evidence only. [1]
Automatic summary · not editorially reviewed
The key findings
A prior genome-wide analysis in gilthead sea bream found skeletal muscle markers with inverse age-related expression and methylation patterns, including psmd2, ramp1, sirt1 and smad1 up-regulated and hypomethylated with age. [1]
Increased temperature and high stocking density with low oxygen induced transcriptional profiles resembling muscle gene-expression patterns of older individuals. [1]
Cold exposure and nutritional interventions promoted signatures aligned with those observed in younger animals, though direct reversal of stress-induced aging signatures was not tested. [1]
The source at a glance
- Study type / format
- Abstract of a gene-expression study using a real-time PCR array.
- Population / context
- Farmed gilthead sea bream (Sparus aurata) in aquaculture-relevant challenge experiments.
- Summary based on
- Study abstract
- Original publication
- July 9, 2026
Muscle gene set from prior sea bream analysis
The abstract builds on a previous genome-wide analysis in gilthead sea bream that found skeletal muscle markers with inverse age-related expression and methylation patterns. Four genes (psmd2, ramp1, sirt1, smad1) were up-regulated and hypomethylated with age; six others (atp1a2, bmp1, calcrl, col5a1, spred2, thrb) were down-regulated with hypermethylation. The present work tested how this gene set responded to aquaculture-relevant challenges using a real-time PCR array.
Supporting source [1]
Stressors versus cold and feeding in farmed fish
Environmental stressors such as increased temperature and high stocking density with low oxygen concentration induced transcriptional profiles resembling muscle gene-expression patterns of older individuals. In contrast, cold exposure and nutritional interventions — restricted feeding and feed supplemented with bioactive protein hydrolysates, microalgae meal with a PUFA-rich lipid source, or fat emulsifiers — promoted signatures aligned with those seen in younger animals. The abstract states that direct reversal of stress-induced aging signatures was not tested.
Supporting source [1]
Preliminary framework, not a welfare tool
The authors describe the results as preliminary evidence of a potential relationship between biological age and aquaculture stressors in farmed fish. They suggest this underpins a genomics-based framework for welfare assessment and adaptive management, and that dietary interventions elicit opposing transcriptional patterns, highlighting potential strategies to mitigate environmentally mediated aquaculture stress through targeted nutrition. The abstract does not report sample sizes, follow-up, or whether the gene patterns translate into health or welfare outcomes.
Supporting source [1]
How to interpret this
Abstract only; the full text was not reviewed. The abstract reports preliminary evidence, does not give sample sizes, follow-up or welfare outcomes, and states that direct reversal of stress-induced aging signatures was not tested. Gene-expression patterns are not shown to cause or predict health outcomes.
Based on the study abstract; the full paper, tables and supplementary data were not reviewed.
Source & supporting passages
Naya-Català F, Gasperini A, Carbonero-Acín B, Calduch-Giner J, Belenguer Á, Pérez-Sánchez J. · europepmc.org · July 9, 2026