Blood Immune Cells: An Inflammatory Type Grows With Age
Graded Preliminary — a one-time look at blood cells from healthy donors of different ages; no one was followed over time, and the summary gives no donor count.
- Design
- Cross-sectional study
- Participants
- —
- Duration
- —
- Funding
- National Natural Science Foundation of China; Anhui Province Science Fund…
With age, the blood holds more scavenger cells that make large amounts of an inflammation messenger.
Our immune system keeps changing from the womb to old age. A team in China has now mapped this change cell by cell. In older people they found more scavenger cells that make a lot of IL-1 beta, a messenger that drives inflammation. The researchers think this adds to the quiet, ongoing inflammation that comes with aging.
They studied white blood cells from healthy donors, ranging from unborn babies in mid-pregnancy to people in late adulthood. For each single cell, they read which genes were switched on. They also checked which stretches of DNA were open and accessible. T cells, a core part of the immune defense, changed the most with age. In early childhood, a group of natural killer cells was common that tends to hold back rather than attack.
The result is an atlas, not an explanation. Each donor was sampled only once, so no one's cells were tracked over the years. Whether the inflammatory scavenger cells help cause age-related disease cannot be read from this work.
Disclaimer: Research summaries are provided for informational purposes only and do not constitute medical advice. Always consult a qualified healthcare professional before making changes to your health routine.