Mixed
Short telomere length in peripheral blood mononuclear cells (PBMC) serves as a robust biomarker for cumulative oxidative stress and predicts increased mortality risk from cardiovascular and infectious diseases in individuals aged 60 and older.
Your white blood cell telomere length reflects your body's cumulative history of oxidative stress and cellular aging. While not a guaranteed predictor of specific disease for every individual, significantly shorter telomeres in this population are statistically linked to higher mortality from heart and infectious diseases. Focus on reducing oxidative stress through lifestyle factors, as telomere length is responsive to stress levels.
PBMC telomere length fulfils a number of criteria for a robust biomarker of human ageing: it changes progressively with calendar age, it varies significantly between individuals, and it is connected to the basic biology of ageing both as a trigger of cellular senescence and as an indicator of the balance between oxidative stress and antioxidative defence.
Why this rating
The paper states that most evidence is correlative, comes from underpowered studies, and lacks longitudinal data, though specific mortality studies show significant differences.
Source
Telomeres as Biomarkers for Ageing and Age-Related Diseases
Thomas von Zglinicki et al. · Current Molecular Medicine · 2005
DOI 10.2174/1566524053586545
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- Oxidative stress accelerates telomere shortening disproportionately compared to genomic DNA due to telomeric DNA's poor repair capacity for single-strand breaks.Good
- Telomere-dependent cellular senescence contributes to tissue-specific functional attenuation in aging tissues, such as immunosenescence, cardiovascular disease, and muscle aging.Moderate
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