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Stress Accelerates Telomere Shortening: Link to Aging & Disease
The Stress–Telomere Connection
Chronic stress shortens telomeres—protective caps on chromosome ends that prevent DNA degradation. Telomere length is a biomarker of cellular aging.
Mechanisms
- Oxidative stress: Stress hormones (cortisol, catecholamines) increase reactive oxygen species, damaging telomeric DNA.
- Reduced telomerase: Chronic stress suppresses telomerase, the enzyme that maintains telomeres.
- Inflammation: Stress-induced IL-6, TNF-α accelerate cellular senescence.
Health Consequences
- Premature aging phenotypes
- Increased cardiovascular disease, diabetes, dementia risk
- Weakened immune response
- Shorter lifespan in epidemiological studies
Protective Factors
- Mindfulness, meditation, yoga
- Regular aerobic exercise
- Strong social support
- Adequate sleep, balanced nutrition
- Therapy for trauma/chronic stress
Telomere length is modifiable. Stress management isn't just psychological—it's cellular protection.
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