Disrupted immune signaling impairs B cell development in mice
Experiments in mice traced reduced B cell production to premature development, increased protein production and limited spare energy for cell expansion.
Our read
Mechanisms- Studied:
- Experiments in mice
- Stake:
- Genomics & Bioinformatics funded the study.
- Why it’s aging research:
- Old against young, or naturally aged tissue.
Editor of record: Boris Djordjevic · AgingResearch.News
In experiments in mice of both sexes, researchers studied how NF-κB, a regulator of gene activity involved in inflammation, changed during B cell development. B cells are immune cells involved in making antibodies. They compared mice aged 12 and 112 weeks and genetically disrupted NF-κB regulation in other mice.
Healthy development involved rises and falls in NF-κB levels. Among aged mice, disrupted patterns were associated with particularly low B cell numbers. Genetic disruption caused severe shortages of B cells. Mathematical modeling and experiments with mouse cells grown in the lab indicated that developing B cells matured too quickly, skipping stages when their numbers normally expand. Analysis of gene activity in individual mouse cells supported these premature transitions. In genetically altered cells, abnormal gene activation increased protein production, leaving little spare energy for population growth.
Why it matters
The work addresses why antibody-based immunity declines with age, focusing on how bone marrow supplies new B cells.
Caveats
The causal experiments used genetically altered mice, mostly young; the naturally aged mice provided an association rather than a causal test. Researchers grouped the aged mice to make differences in signaling patterns as statistically distinct as possible.
The paper
University of California, Los Angeles
Cell Press Blue, Jun 15, 2026, Open access
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