Human immune map highlights distinctive patterns in infants
An observational study of 167 healthy people aged 2 months to 105 years linked age to differences in blood immune cells and gene activity.
Cohort study
Limit: The map covers selected blood immune cells, leaving immune cells in other tissues unmeasured
Stake: An author founded Immunoledge.
Edited by Boris Djordjevic · AgingResearch.News
Researchers profiled blood immune cells from 167 healthy people—86 females and 81 males—aged 2 months to 105 years in an observational study. They measured gene activity in individual cells. In 23 participants, they also examined how accessible DNA was to the machinery that reads genes.
Infants had distinct immune-cell patterns, including ongoing activity of genes switched on by interferons, proteins involved in antiviral defense. Conventional CD8 T cells, which can kill infected cells, showed the most pronounced age-related changes. Within this group, cells that had not yet encountered their targets were less common at older ages, while several memory-cell types were more common. Older age was also associated with increased activity of inflammation and stress-response pathways and decreased activity of interferon pathways.
Why it matters
The map provides a reference for investigating immune aging alongside early-life immune development.
Caveats
This cross-sectional study compared different people rather than following individuals through life. Its findings concern selected blood immune cells in healthy people and do not necessarily apply to people with immune disorders.
The paper
The Jackson Laboratory for Genomic Medicine
Nature Communications, Jun 15, 2026, Open access
