Related Experiment Video
Updated: Jul 11, 2026

11:47
Time-lapse Imaging of Primary Preneoplastic Mammary Epithelial Cells Derived from Genetically Engineered Mouse Models of Breast Cancer
Published on: February 8, 2013
Modeling aging and cancer in the telomerase knockout mouse
1Department of Molecular Genetics, MD Anderson Cancer Center, Houston, TX 77030, USA. schang@mdanderson.org
Mutation Research
|June 2, 2005
Summary
Telomere dysfunction in mice reveals conserved cellular responses relevant to aging and cancer. The telomerase deficient mouse model highlights the critical balance between telomere length regulation, aging, and cancer development.
Area of Science:
- Genetics and Molecular Biology
- Gerontology
- Cancer Research
Background:
- Telomere dysfunction is implicated in aging and cancer.
- The telomerase deficient mouse model offers insights into telomere biology.
- Understanding telomere regulation is crucial for mammalian organismal health.
Purpose of the Study:
- To discuss the utility of the telomerase null mouse model.
- To explore the roles of telomeres and telomerase in aging and cancer.
- To elucidate the consequences of telomere dysfunction in mammals.
Main Methods:
- Utilizing a telomerase deficient mouse model.
- Observing cellular responses to telomere dysfunction.
- Analyzing the impact on organismal aging and cancer.
Main Results:
- Cellular responses to telomere dysfunction are conserved between humans and mice.
- Tight regulation of telomere length and telomerase activity is vital.
- Telomere dysfunction impacts both aging and cancer progression.
Conclusions:
- The telomerase null mouse is invaluable for studying telomere biology.
- Telomere regulation plays a key role in the aging-cancer balance.
- Further research using this model can clarify contrasting roles in aging and cancer.
Related Concept Videos
Telomeres and Telomerase
In eukaryotic DNA replication, a single-stranded DNA fragment remains at the end of a chromosome after the removal of the final primer. This section of DNA cannot be replicated in the same manner as the rest of the strand because there is no 3’ end to which the newly synthesized DNA can attach. This non-replicated fragment results in gradual loss of the chromosomal DNA during each cell duplication. Additionally, it can induce a DNA damage response by enzymes that recognize single-stranded DNA.
Replicative Cell Senescence
Replicative cell senescence is a property of cells that allows them to divide a finite number of times throughout the organism's lifespan while preventing excessive proliferation. Replicative senescence is associated with the gradual loss of the telomere — short, repetitive DNA sequences found at the end of the chromosomes. Telomeres are bound by a group of proteins to form a protective cap on the ends of chromosomes. Embryonic stem cells express telomerase — an enzyme that adds the telomeric...
Mouse Models of Cancer Study
Mice have long served as models for studying human biology and pathology because of their phylogenetic and physiological similarity with humans. They are also easy to maintain and breed in the laboratory, and hence, many inbred strains are now available for research. Studies on mice have contributed immeasurably to our understanding of cancer biology.
The development of transgenic, knockout, and knock-in mice has led to an exponential increase in their use as model organisms in research,...
The development of transgenic, knockout, and knock-in mice has led to an exponential increase in their use as model organisms in research,...
Telomeres and Telomerase
In eukaryotic DNA replication, a single-stranded DNA fragment remains at the end of a chromosome after the removal of the final primer. This section of DNA cannot be replicated in the same manner as the rest of the strand because there is no 3’ end to which the newly synthesized DNA can attach. This non-replicated fragment results in gradual loss of the chromosomal DNA during each cell duplication. Additionally, it can induce a DNA damage response by enzymes that recognize single-stranded DNA.
Mouse Models of Cancer Study
Mice have long served as models for studying human biology and pathology because of their phylogenetic and physiological similarity with humans. They are also easy to maintain and breed in the laboratory, and hence, many inbred strains are now available for research. Studies on mice have contributed immeasurably to our understanding of cancer biology.
The development of transgenic, knockout, and knock-in mice has led to an exponential increase in their use as model organisms in research,...
The development of transgenic, knockout, and knock-in mice has led to an exponential increase in their use as model organisms in research,...

