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Senolytics improve physical function and increase lifespan in old age
Ming Xu1,2, Tamar Pirtskhalava3, Joshua N Farr3
1Robert and Arlene Kogod Center on Aging, Mayo Clinic, Rochester, MN, USA. mixu@uchc.edu.
Nature Medicine
|July 11, 2018
Summary
Cellular senescence drives physical decline and shortens lifespan. Senolytic drugs targeting these senescent cells can reverse dysfunction and extend healthspan in aging mice.
Area of Science:
- Gerontology
- Cellular Biology
- Immunology
Background:
- Physical function decline is a hallmark of aging, associated with disability and mortality.
- Cellular senescence, a state of irreversible cell cycle arrest, contributes to tissue dysfunction and age-related diseases.
- Therapeutic targeting of cellular senescence remains an underexplored area in aging research.
Purpose of the Study:
- To investigate whether senescent cells can directly cause age-related physical dysfunction and mortality.
- To determine if senolytic therapies can ameliorate senescence-induced pathology and extend lifespan.
Main Methods:
- Transplantation of senescent cells into young and aged mice.
- Administration of a senolytic cocktail (dasatinib plus quercetin).
- Assessment of physical function, survival rates, and senescence markers in host tissues.
Main Results:
- Transplanting senescent cells into young mice induced physical dysfunction and spread senescence to host tissues.
- Senescent cells reduced survival and exacerbated physical decline in aged mice.
- Senolytic treatment alleviated physical dysfunction, reduced senescence burden, and increased survival in both young and aged mice.
Conclusions:
- Senescent cells are potent drivers of age-related physical decline and reduced lifespan.
- Senolytic therapies offer a promising strategy for mitigating senescence-associated pathologies and promoting healthy aging.
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