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Related Experiment Videos

Senescence, aging, and disease.

Douglas E Crews1

  • 1The Ohio State University, Columbus, Ohio 432-1364, USA. Crews.8@osu.edu

Journal of Physiological Anthropology
|July 21, 2007
PubMed
Summary
This summary is machine-generated.

Human lifespan is increasing, but aging involves complex senescence and disease processes, not just time. Understanding these distinctions is key to addressing chronic degenerative conditions in later life.

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Area of Science:

  • Gerontology
  • Cellular Biology
  • Pathology

Background:

  • Increased human longevity is a modern phenomenon.
  • Aging involves physiological decrements, distinct from benign age-related changes.
  • Chronic degenerative conditions (CDCs) in late life blur distinctions between aging, senescence, and disease.

Purpose of the Study:

  • To differentiate between aging, senescence, and disease processes.
  • To explore the complexity of health and well-being factors in advanced age.
  • To understand the manifestation of CDCs as phenotypic expressions of senescence.

Main Methods:

  • Review of physiological decrements with age.
  • Analysis of the relationship between senescence, disease, and CDCs.
  • Comparative analysis of aging in human and animal populations.

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Main Results:

  • Senescence begins at the molecular and cellular level, leading to organ dysfunction and frailty.
  • Age-related diseases are pathological processes, distinct from senescence, though they can co-occur.
  • CDCs in older adults often represent manifestations of senescing biological components.

Conclusions:

  • Aging is a multifactorial process involving senescence and disease, not solely chronological time.
  • Cultural factors in modern societies have partially decoupled frailty from mortality compared to earlier epochs.
  • Further research is needed to disentangle the interplay of senescence and disease in promoting healthspan.