Age-linked RNA processing differs in human brain and body
The spread of age-linked effects at the same RNA joining sites was 2.0–2.8 times as wide in brain as in body tissues from the same donors.
Our read
Mechanisms- Studied:
- Preprint: computational study (382 brain donors, cross-sectional study, independent replication)
Editor of record: Boris Djordjevic · AgingResearch.News
Human tissue samples from donors aged 20–79 were compared across 49 tissue types in a cross-sectional analysis. The researchers studied RNA splicing, which cuts and joins RNA pieces, and asked how use of joining sites differed with age.
In brain tissue, many alternative joins were less common at older ages relative to selected reference joins. Many brain changes followed the same direction in an independent collection of brain samples taken after death. Body-tissue patterns did not match independent results from blood, liver and connective-tissue cells from living donors. Accounting for ventilator use around death substantially weakened age-linked patterns in body tissues.
Why it matters
RNA splicing shapes the instructions cells use to make proteins. The work addresses whether this process follows a common aging pattern throughout the body.
Caveats
The analysis compared different donors rather than tracking changes within people, and some patterns weakened after accounting for circumstances of death or RNA degradation. This is a preprint, not yet peer-reviewed.
Where the evidence stands
RNA splicing
- 42 independent labs in 13 countries
- 1 finding against
- Funders: National Institutes of Health and others
- 3 of 53 findings with company ties
- RNA splicing
- Acetylation-machinery scores
- Age slope of exonic-to-intronic coverage contrast
- Alternative junction use
- Alternative junction use relative to principal junctions
- Humans
The paper
Older and Younger Splicing Across 49 Human Tissues
Preprints.org, Nov 5, 2026, Open access, Preprint, not yet peer-reviewed
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