Senolytics improve physical function and increase lifespan in old age

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.