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Updated: May 10, 2026
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Utilizing Murine Inducible Telomerase Alleles in the Studies of Tissue Degeneration/Regeneration and Cancer
Published on: April 13, 2015
Premature aging in telomerase-deficient zebrafish
Monique Anchelin1, Francisca Alcaraz-Pérez, Carlos M Martínez
1Telomerase, Aging and Cancer Group, Research Unit, Department of Surgery, CIBERehd, University Hospital "Virgen de la Arrixaca", Murcia, Spain.
Disease Models & Mechanisms
|June 8, 2013
Summary
Telomerase-deficient zebrafish exhibit premature aging and reduced lifespan, mirroring human diseases like dyskeratosis congenita. This model aids in understanding telomere biology and discovering new drugs for related conditions.
Area of Science:
- Gerontology
- Molecular Biology
- Genetics
Background:
- Telomere biology is critical for understanding aging and cancer.
- Mice are common models, but fundamental differences exist between mouse and human cells.
- Additional vertebrate models are needed for studying human telomere biology.
Purpose of the Study:
- To characterize telomerase-deficient zebrafish (Danio rerio) as a model for human telomerase-driven diseases.
- To investigate the role of telomere shortening and telomerase activity in aging and disease.
- To explore the potential of zebrafish for drug discovery in telomere-related disorders.
Main Methods:
- Generation and characterization of telomerase-deficient zebrafish.
- Assessment of aging phenotypes, lifespan, and telomere length.
- Investigation of p53 pathway activation and rescue experiments.
- Analysis of disease anticipation and telomerase restoration effects.
Main Results:
- Telomerase-deficient zebrafish display p53-dependent premature aging and reduced lifespan, similar to humans.
- Observed aging symptoms include spinal curvature, organ degeneration, and infertility.
- Telomerase deficiency leads to early embryonic lethality in the second generation, but restoration rescues telomere length and survival.
- The model reproduces disease anticipation seen in human dyskeratosis congenita (DC).
- p53 is induced by telomere attrition, and its inhibition rescues adverse effects, indicating conserved molecular mechanisms.
Conclusions:
- Telomerase-deficient zebrafish serve as a valuable vertebrate model for human telomere-driven diseases.
- The model highlights the crucial role of telomerase dosage and the p53 pathway in aging and disease.
- Zebrafish's amenability to high-throughput screening makes it useful for discovering drugs to reactivate telomerase for conditions like DC.
