Age-linked gene shifts span human brain precursor cell states
Within-group changes accounted for 98.8–99.5% of a 41-gene pattern’s adjusted age-related difference, versus 0.8–1.2% from changes in group proportions.
Independent replication
Limit: The breakdown omits age-related gene changes outside the 41-gene program
Edited by Boris Djordjevic · AgingResearch.News
In an observational study, researchers examined human prefrontal cortex oligodendrocyte precursor cells, which give rise to cells that insulate nerve fibers. They defined an aging-related pattern of gene activity: 22 genes with lower activity and 19 with higher activity at older ages. Both parts showed the expected age links in two independent cortical datasets not used to select the genes.
Paired measurements of gene activity and DNA accessibility from 349 donors showed that changes within cell states—groups defined by gene activity—accounted for nearly all of the pattern’s adjusted difference in average scores per cell. Changes in group proportions contributed little. A state associated with commitment to further development became less common among sampled cell nuclei with age in both donor sources. Removing that state left the broad gene-activity pattern essentially unchanged.
Why it matters
Aging impairs these precursor cells’ function, making the source of their age-linked gene-activity patterns relevant to understanding how the brain changes with age.
Caveats
This observational analysis cannot establish cause, and the breakdown applies only to this 41-gene program. The changing share of sampled nuclei does not establish a change in the cells’ absolute abundance in brain tissue.
- Transcriptomics
- Chromatin and 3D genome organization
- 41-gene OPC aging program
- 41-gene OPC aging program RNA scores
- Promoter accessibility
- Humans
The paper
Niigata University
Neurobiology of Disease, Oct 30, 2026
