The association between telomere length and ischemic stroke risk and phenotype

Area of Science:

• Biomedical research
• Gerontology
• Neurology

Background:

• Chronological age is crucial for ischemic stroke prognosis.
• Telomere length serves as a biomarker for biological aging.
• Telomere shortening occurs with cellular division.

Purpose of the Study:

• To determine telomere length in ischemic stroke patients.
• To evaluate the association between telomere length and stroke characteristics.
• To assess the relationship with etiology, severity, and outcome.

Main Methods:

• Prospective cohort study.
• Peripheral blood leukocytes analyzed for telomere length using Southern blot.
• Comparison between 163 ischemic stroke patients and 163 controls.

Main Results:

• Shorter telomere length (lowest quartile) significantly associated with ischemic stroke (OR 2.95).
• This association held for most stroke etiologies.
• Shorter telomeres correlated with higher National Institutes of Health Stroke Scale scores upon admission, adjusted for confounders.
• No association found between telomere length and lesion volume or 90-day outcomes.

Conclusions:

• Shorter telomere length is a risk factor for ischemic stroke.
• It may indicate reduced cerebral tissue resilience to ischemia due to biological aging.
• Chronological age, not telomere length, predicted long-term outcomes and mortality.