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The process and theories of aging
1Pathology and Laboratory Medicine, Salt Lake VA Medical Center, UT 84132, USA.
Annals of Clinical and Laboratory Science
|January 1, 1995
Summary
Aging theories include stochastic, developmental, programmed, and free radical. Genome-based and free radical theories show strong evidence, potentially linking to other aging factors.
Area of Science:
- Gerontology and molecular biology.
- Exploration of aging mechanisms.
Background:
- Multiple theories attempt to explain the complex aging process.
- Current hypotheses include stochastic, developmental, programmed, and free radical theories.
Purpose of the Study:
- To review and synthesize prominent theories of aging.
- To highlight theories with substantial supporting evidence.
Main Methods:
- Literature review of aging theories.
- Analysis of observational and experimental evidence supporting each theory.
Main Results:
- Stochastic theories involve random damage accumulation (somatic mutation, error catastrophe, protein glycosylation).
- Developmental theories focus on the immune and neuroendocrine systems.
- Programmed theories suggest a genetic basis for aging (genome-based).
- The free radical theory posits oxidative stress as a key factor.
- Genome-based and free radical theories are particularly well-supported by evidence.
- Interconnections between aging theories are suggested.
Conclusions:
- No single theory fully explains aging.
- Genome-based and free radical theories offer significant insights into aging.
- Further research is crucial for a comprehensive understanding of aging.
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