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Updated: Jan 16, 2026
Studying Age-dependent Genomic Instability using the S. cerevisiae Chronological Lifespan Model
Published on: September 29, 2011
The DREAM complex links somatic mutation, lifespan, and disease
Zane Koch1, Shuvro P Nandi2,3, Kate Licon3
1Program in Bioinformatics and Systems Biology, University of California San Diego, La Jolla CA, 92093, USA.
Abstract:
The DREAM complex has emerged as a central repressor of DNA repair, raising questions as to whether such repression exerts long-term effects on human health. Here we establish that DREAM activity significantly impacts lifetime somatic mutation burden, and that such effects are linked to altered lifespan and age-related disease pathology. First, joint profiling of DREAM activity and somatic mutations across a single-cell atlas of 21 mouse tissues shows that cellular niches with lower DREAM activity have decreased mutation rates. Second, DREAM activity predicts the varied lifespans observed across 92 mammals, with low activity marking longer-lived species. Third, reduced DREAM activity in Alzheimer's patients predicts late disease onset and decreased risk for severe neuropathology. Finally, we show DREAM knockout protects against mutation accumulation in vivo, reducing single-base substitutions by 4.2% and insertion/deletions by 19.6% in brains of mice. These findings position DREAM as a key regulator of aging.
Insights
The DREAM complex regulates DNA repair and impacts aging. Lower DREAM activity reduces mutation rates, extends lifespan in mammals, and may protect against Alzheimer's disease, suggesting it's a key aging regulator.
Area of Science:
- Genetics
- Molecular Biology
- Aging Research
Background:
- The DREAM complex is a known repressor of DNA repair.
- Its long-term effects on human health and aging are not well understood.
Purpose of the Study:
- To investigate the impact of DREAM complex activity on somatic mutation burden, lifespan, and age-related diseases.
- To determine if DREAM complex activity is a key regulator of aging.
Main Methods:
- Joint profiling of DREAM activity and somatic mutations in a single-cell atlas of 21 mouse tissues.
- Correlation analysis of DREAM activity with lifespan across 92 mammalian species.
- Analysis of DREAM activity in Alzheimer's patients.
- In vivo study of DREAM knockout mice to assess mutation accumulation.
Main Results:
- Cellular niches with lower DREAM activity exhibited decreased mutation rates.
- Lower DREAM activity was associated with longer lifespans in mammals.
- Reduced DREAM activity in Alzheimer's patients correlated with later disease onset and less severe neuropathology.
- DREAM knockout in mice reduced single-base substitutions by 4.2% and indels by 19.6% in the brain.
Conclusions:
- DREAM complex activity significantly influences lifetime somatic mutation burden.
- DREAM activity is linked to lifespan and age-related disease pathology.
- The DREAM complex is positioned as a key regulator of the aging process.
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