4-Octyl itaconate restores parotid gland function in aging mice
The itaconate derivative reduces fibrosis and lipid buildup while curbing oxidative stress through AMPK signaling pathways.
FASEB journal : official publication of the Federation of American Societies for Experimental Biology · Chen Y et al. · Paper published 30 Sep 2026
In 13-month-old male mice, daily treatment with 4-octyl itaconate for four weeks restored salivary secretion in aging parotid glands. Researchers administered 25 mg/kg of 4-octyl itaconate or vehicle to assess salivary flow rate and gland morphology. Molecular docking identified AMPKα as a direct target of the compound. Functional assays demonstrated that 4-octyl itaconate increased salivary flow and upregulated AMPKα phosphorylation. The compound reduced lipid droplet accumulation, suppressed collagen fibrosis, and increased fatty acid oxidation through AMPKα and PPARα pathways. Pharmacological inhibition of AMPKα or PPARα abolished these beneficial effects. In addition, treatment prevented age-related oxidative reactions, enhanced mitochondrial biogenesis, and activated the protective Nrf2 signaling pathway.
Why it matters
Parotid gland dysfunction frequently impairs saliva production in older individuals, and targeting metabolic and antioxidant pathways may help preserve glandular function during aging.
Caveats
This study was conducted exclusively in male mice over a four-week treatment period, and the findings have not been evaluated in humans.
Written from the paper’s abstract, and every claim checked against it before publishing. Read the paper for the full methods and data.
The paper
4-Octyl Itaconate Attenuates Age-Induced Parotid Gland Dysfunction Through the Suppression of Fibrosis and Lipid Deposition by AMPKα/PPARα and the Inhibition of Oxidative Stress via the AMPKα/Nrf2 Signaling Pathway
Chen Y, Gong T, Shan Z et al.
FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 30 Sep 2026 · Peer-reviewed
- Relevance
- Core geroscience
- News value
- Notable
- Evidence
- Animals
- Status
- Peer-reviewed
Latest stories
Gastrodia elata polysaccharide extends worm lifespan and mitigates age-related deficits in mice
The treatment reduced oxidative stress, suppressed inflammation, and remodeled the gut microbiome in naturally aging mice while prolonging survival in nematodes.
Food science & nutrition · Shi H et al.
Simulated microgravity increases transcriptomic age in human organoids
Culturing human neural, cardiac, and tonsil models in rotating-wall vessels for 24 hours also shifted contraction dynamics and immune gene expression.
bioRxiv · Mu W-C et al.
Rank normalization resolves distinct proteome degradation pathways in cultured cells
A percentile-based normalization method reveals substrate preferences between proteasomal and lysosomal clearance systems in cultured cells.
bioRxiv · Gao Z et al.
Melissic acid reduces senescence in human stem cells via cAMP signaling
A screen of 800 natural compounds identified a phytochemical that activates autophagy and restores cell-cycle activity in models of cellular exhaustion.
Frontiers in pharmacology · Yang K et al.