Telomere length predicts poststroke mortality, dementia, and cognitive decline.

Area of Science:

• Neuroscience
• Genetics
• Gerontology

Background:

• Cognitive decline and dementia are common long-term complications following stroke.
• Early identification of stroke survivors at risk for cognitive impairment is crucial for secondary prevention strategies.
• Telomere length has emerged as a potential biomarker for aging and disease risk.

Purpose of the Study:

• To investigate telomere length in peripheral blood mononuclear cells as a prognostic risk marker for cognitive decline and dementia in stroke survivors.
• To assess the association between telomere length and long-term cognitive development, dementia incidence, and survival after stroke.

Main Methods:

• Prospective cohort study of 195 non-demented stroke survivors followed for 2-5 years.
• Telomere length measurement in peripheral blood mononuclear cells at 3 months post-stroke.
• Cognitive assessments (including Mini-Mental State Examination) and dementia diagnosis performed.
• Statistical analysis using multivariate techniques to estimate hazard and odds ratios and linear regression.

Main Results:

• Longer telomeres at baseline were significantly associated with a reduced risk of death (HR=0.52, p=0.04) and dementia (OR=0.19, p=0.002) after adjusting for age.
• A longer telomere length also correlated with less reduction in Mini-Mental State Examination scores over 2 years (p=0.04).

Conclusions:

• Telomere length serves as a significant prognostic marker for post-stroke cognitive decline.
• Telomere length can predict the risk of developing dementia and mortality in stroke survivors.
• These findings highlight the potential of telomere length measurement for risk stratification and targeted interventions in stroke care.