Age-related physiological dysregulation progresses slowly in semi-free-ranging chimpanzees

Area of Science:

• Primatology
• Comparative Biology
• Aging Research

Background:

• Lifestyle significantly impacts human health and aging.
• Previous studies in chimpanzees (Pan troglodytes) suggest shared lifestyle effects on health biomarkers between humans and other species.
• Semi-free-ranging chimpanzees on naturalistic diets exhibit healthier biomarkers than sedentary, captive counterparts.

Purpose of the Study:

• To investigate how environmental lifestyle factors influence physiological aging rates in chimpanzees.
• To compare physiological dysregulation as an index of biological aging between semi-free-ranging and captive chimpanzees.
• To determine if aging patterns differ by sex or body system, mirroring human aging.

Main Methods:

• Compared physiological dysregulation in semi-free-ranging chimpanzees (African sanctuary) versus captive chimpanzees (US laboratories).
• Assessed age-related changes in physiological dysregulation.
• Examined differences based on sex and body system.

Main Results:

• Semi-free-ranging chimpanzees exhibited lower overall physiological dysregulation and slower age-related increases in dysregulation.
• Males showed less dysregulation than females in both environments.
• Distinct aging patterns across body systems were observed between the two populations.

Conclusions:

• Naturalistic living conditions are associated with healthier aging in chimpanzees.
• These findings support the hypothesis that lifestyle's effects on aging are evolutionarily conserved.
• The study provides evidence for shared evolutionary roots of lifestyle impacts on health and aging.