Making SENSE: strategies for engineering negligible senescence evolutionarily

Area of Science:

• Evolutionary Biology
• Gerontology
• Genetics

Background:

• Historically, maximum lifespan was considered a fixed species characteristic.
• The evolutionary theory of aging proposed that lifespan could be manipulated.
• Early experiments focused on the fruit fly, Drosophila melanogaster.

Purpose of the Study:

• To investigate the potential for extending maximum lifespan through evolutionary manipulation.
• To explore the theoretical underpinnings of aging and its relationship to adaptation.
• To propose a new framework for understanding and intervening in the aging process.

Main Methods:

• Evolutionary manipulation of natural selection forces in Drosophila melanogaster over generations.
• Theoretical analysis of mortality-rate plateaus and their implications for aging.
• Extrapolation of findings from model organisms to potential applications in mammals and humans.

Main Results:

• Demonstrated that manipulating natural selection can significantly slow aging rates (demographically and physiologically) in fruit flies.
• Revealed that aging is not solely due to accumulated damage but involves a transient fall in age-specific adaptation.
• Provided evidence that "SENS" (Strategies for Engineered Negligible Senescence) should focus on re-tuning adaptation.

Conclusions:

• Maximum lifespan is not an absolute limit and can be extended through evolutionary approaches.
• Aging is a dynamic process linked to adaptation, offering avenues for intervention beyond damage repair.
• Evolutionary strategies offer both scientific and practical pathways for engineering negligible senescence and slowing human aging.