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Published on: April 13, 2015
Linking functional decline of telomeres, mitochondria and stem cells during ageing
Ergün Sahin1, Ronald A Depinho
1Belfer Institute for Applied Cancer Science, Department of Medical Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, Massachusetts 02115, USA.
Nature
|March 26, 2010
Summary
Aging results from the interplay of genome maintenance, DNA damage, and metabolism. Telomere damage and p53 activation impair stem cells and mitochondria, driving age-related decline.
Area of Science:
- Genetics
- Molecular Biology
- Gerontology
Background:
- Genome maintenance, DNA damage signaling, and metabolic regulation are implicated in aging.
- Age-associated telomere damage, loss of capping, and p53 activation affect stem cell function and mitochondrial health.
- These factors contribute to tissue renewal and bioenergetic support decline.
Purpose of the Study:
- To model the interactions between telomeres, stem cells, and mitochondria in aging.
- To understand the role of genome integrity, stemness, and metabolism in age-related disorders.
Main Methods:
- Review and synthesis of evidence from human genetic disorders and mutant mouse models.
- Conceptual modeling of molecular interactions.
Main Results:
- Telomere damage and p53 activation are key drivers of stem cell and mitochondrial dysfunction in aging.
- These processes negatively impact tissue renewal and energy metabolism.
- A model framework is proposed for understanding aging and age-related diseases.
Conclusions:
- The interaction of telomeres, stem cells, and mitochondria, governed by genome integrity and metabolic factors, is crucial for aging.
- This framework aids in understanding the pathogenesis of age-related disorders.
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