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Broad segmental progeroid changes in short-lived Ercc1(-/Δ7) mice
Martijn E T Dollé1, Raoul V Kuiper, Marianne Roodbergen
1Laboratory of Heath Protection Research, National Institute of Public Health and the Environment, Bilthoven, The Netherlands.
Pathobiology of Aging & Age Related Diseases
|September 7, 2012
Summary
Defects in genome maintenance, like in the ERCC1 protein, accelerate aging. A specific Ercc1 variant (Ercc1(-/Δ7)) in mice showed significantly reduced lifespan and accelerated aging symptoms.
Area of Science:
- Genetics
- Molecular Biology
- Aging Research
Background:
- Genome maintenance is crucial for longevity, with defects linked to progeroid syndromes.
- The ERCC1 protein plays a key role in DNA repair pathways, including nucleotide excision repair, interstrand cross-link repair, and homologous recombination.
Purpose of the Study:
- To investigate the in-life and post-mortem characteristics of a hypomorphic Ercc1 variant (Ercc1(-/Δ7)) in mice.
- To determine if this variant leads to an accelerated aging phenotype.
Main Methods:
- Generation and observation of Ercc1(-/Δ7) mice hemizygous for a truncated Ercc1 allele.
- Comparative analysis of lifespan, body and organ weight, histopathological lesions, and immune parameters between Ercc1(-/Δ7) mice and wild-type siblings.
Main Results:
- Ercc1(-/Δ7) mice exhibited significantly reduced median lifespan (20 weeks) compared to wild-type siblings (118 weeks).
- These mice displayed accelerated aging signs, including decreased body and organ weights, numerous histopathological lesions, and altered immune parameters.
- The observed phenotype was characterized as segmental progeroid.
Conclusions:
- The hypomorphic Ercc1(-/Δ7) mouse model recapitulates key features of accelerated aging.
- This model provides valuable insights into the role of ERCC1 in genome maintenance and its impact on longevity and aging processes.
