Muscle stem cells reduced organ injury in a mouse aging model
Weekly cell injections improved movement and memory in female KM mice given D-galactose for eight weeks to model accelerated aging.
Limit: Naturally aged mice received behavioral tests, not assessments of broader organ injury
Edited by Boris Djordjevic · AgingResearch.News
In an animal experiment, female KM mice received D-galactose for eight weeks to model accelerated aging, with or without weekly injections of muscle stem cells into a vein. These cells support skeletal muscle repair.
Mice receiving the cells showed better endurance, foraging, and spatial learning and memory. Blood markers of liver and kidney injury fell, antioxidant markers rose, and inflammatory markers fell. Tissue examinations showed less damage across several organs, including less fat buildup and scarring. Patterns of gene activity shifted partly toward normal. In additional experiments in naturally aged mice, the cells improved performance on tests of movement, food finding, and spatial learning and memory.
Why it matters
Muscle stem cells support muscle repair, but their possible role beyond muscle remains unclear. The authors view them as a candidate temporary way to modify stress-associated dysfunction and behavioral decline in aging models.
Caveats
The organ findings came from a chemically induced model in female mice; testing in naturally aged mice assessed behavior rather than the broader organ effects. The authors said cell fate, sex-specific responses and mechanisms in natural aging still need study.
- Muscle stem cells
- Extracellular matrix remodeling
- Immune response
- Foraging performance
- Spatial learning and memory
- Mice
The paper
Ltd.; Qilu Hospital of Shandong University
Scientific Reports, Oct 27, 2026, Open access, CC BY-NC-ND
