Aging is linked to immune shifts in mouse tear glands
An analysis of 47,537 cells from young and old male mice linked aging to altered immune balance in tear-producing glands.
47,537 high-quality cells
Limit: Gene activity was a proxy for immune function, not a direct functional measurement
Edited by Boris Djordjevic · AgingResearch.News
In an animal study, researchers compared tear-producing glands from 12-week-old and 20-month-old male C57BL/6J mice. They analyzed gene activity in 47,537 individual cells to examine cell types, their states and possible communication between them.
Older mice had greater observed representation of T cells, B cells and plasma cells, all immune cells. Aging was also linked to changes in gland cells and supporting tissue. Regulatory T cells became more frequent, but their gene-activity patterns suggested less ability to restrain immune responses. An analysis of cell communication suggested stronger signaling centered on T cells and weaker interactions that maintain normal tissue balance. The authors highlighted several signaling pathways as candidates for further investigation.
Why it matters
The authors present this map of cells as a framework for investigating how immune aging in tear-producing glands relates to age-related dry eye disease.
Caveats
This comparison of age groups cannot establish whether the immune changes caused gland dysfunction or dry eye. Gene-activity patterns suggested changes in immune function but did not themselves establish those functional changes.
- Cellular homeostasis
- Extracellular matrix remodeling
- FOXO signaling
- Dry eye disease
- Lacrimal gland dysfunction
- Mice
The paper
People's Hospital of Zhengzhou University
Investigative Ophthalmology & Visual Science, Oct 1, 2026
