Mouse study: Sestrin1, liver aging and exercise benefits
In mice, liver Sestrin1 and Sestrin2 declined with age; loss of Sestrin1 worsened liver senescence markers, and Sestrin1 was reported as needed for exercise's liver benefits. [1]
Automatic summary · not editorially reviewed
The key findings
In wild-type mice at young, middle and old ages, liver Sestrin1 and Sestrin2 expression declined progressively with age. [1]
Liver cellular senescence, lipid deposition, oxidative stress and inflammation were significantly worse in Sestrin1 mice than in Sestrin2 and wild-type mice. [1]
The authors report that Sestrin1 is indispensable for exercise's liver-protective benefits in this mouse work. [1]
The source at a glance
- Study type / format
- Preclinical in vivo mouse study with cell experiments (abstract)
- Population / context
- Wild-type C57BL/6J mice at young, middle and old ages, aged Sestrin1 and Sestrin2 mice, and senescent AML12 cells.
- Summary based on
- Study abstract
- Original publication
- October 1, 2026
Aged mice and Sestrin1/2 liver decline
The abstract describes in vivo work in wild-type mice at young, middle and old ages, plus aged mice lacking Sestrin1 or Sestrin2. Aged mice showed multifaceted liver dysfunction. Liver Sestrin1 and Sestrin2 expression fell progressively with age. This is an abstract; the full text was not reviewed.
Supporting source [1]
Sestrin1 loss and liver senescence in mice
According to the abstract, liver cellular senescence, lipid deposition, oxidative stress and inflammation were significantly worse in Sestrin1 mice than in Sestrin2 and wild-type mice. In senescent AML12 cells overexpressing Sestrin1, the described mechanism involved preserved mitochondrial homeostasis via Drp1-driven fission and reduced mitochondrial DNA leakage, suppressing the cGAS-STING pathway; these effects were abolished when fission was inhibited. These are cell and animal findings, not evidence of human lifespan benefit.
Supporting source [1]
Exercise and Sestrin1 in mouse liver
The abstract states that exercise training is known to raise SESN protein levels and reports that Sestrin1 is indispensable for its liver-protective benefits in this mouse work. The authors position Sestrin1 as a therapeutic target and a mediator of exercise's anti-aging benefits. The abstract does not report exercise protocols, sample sizes or follow-up, and the full text was not reviewed.
Supporting source [1]
How to interpret this
Abstract only; the full text was not reviewed. Details such as sample sizes, exercise protocols, follow-up and exact comparisons are not reported here. Findings are from mice and cells, so they do not establish human lifespan or clinical benefits.
Based on the study abstract; the full paper, tables and supplementary data were not reviewed.
Source & supporting passages
Yang X, Zou Y, Li X, Rong Z, Niu Y, Fu L. · europepmc.org · October 1, 2026