Kleemeier award lecture: are there genes for aging?

Area of Science:

• Gerontology
• Genetics
• Evolutionary Biology

Background:

• Aging is a complex process characterized by declining physiological function and increased mortality risk.
• The genetic control of aging is debated, with implications for understanding lifespan and healthspan.
• Natural selection's role in regulating aging is contingent on the balance between survival benefits and costs.

Purpose of the Study:

• To explore the extent to which genetic factors influence the aging process.
• To investigate the genetic basis of lifespan variation within and between species.
• To determine if specific genetic loci play a major role in moderating the rate of aging.

Main Methods:

• Analysis of single gene mutants affecting lifespan.
• Genetic selection experiments in model organisms (e.g., mice, dogs) for traits like body size.
• Comparative genetic and physiological analyses across species.

Main Results:

• Single gene mutations can significantly extend lifespan in mice (over 50%).
• Artificial selection for smaller body size in dogs correlates with extended lifespan.
• Evidence suggests that a limited number of genetic loci may significantly influence the rate of aging.

Conclusions:

• Aging is demonstrably influenced by genetic variations within species.
• Targeting specific genes offers potential for lifespan extension.
• Identifying species-specific genetic determinants of longevity requires integrated genetic and physiological research.