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Nitric oxide-related brain damage in acute ischemic stroke
J Castillo1, R Rama, A Dávalos
1Department of Neurology, Complejo Hospitalario Universitario, Santiago de Compostela, Spain.
Stroke
|February 7, 2001
Summary
Elevated nitric oxide metabolites (NO-m) in cerebrospinal fluid (CSF) indicate greater brain injury and predict early neurological deterioration in acute ischemic stroke patients.
Area of Science:
- Neuroscience
- Neurology
- Biochemistry
Background:
- The role of nitric oxide (NO) in cerebral ischemia is debated.
- This study investigates NO metabolite (NO-m) levels in acute ischemic stroke patients.
Purpose of the Study:
- To analyze the relationship between CSF NO-m concentrations and clinical/neuroimaging parameters of brain injury.
- To determine if NO-m levels correlate with stroke progression and severity.
Main Methods:
- Measured NO-m (nitrates and nitrites) in CSF from 102 acute ischemic stroke patients and 24 controls within 24 hours of symptom onset.
- Assessed early neurological deterioration using the Canadian Stroke Scale and infarct volume via cranial CT.
Main Results:
- Stroke patients had significantly higher CSF NO-m levels than controls (2.1 vs. 1.0 micromol/mL).
- Higher NO-m levels correlated with increased infarct volume and were significantly associated with early neurological deterioration (OR 5.7).
- NO-m concentrations >5.0 micromol/mL predicted worsening independent of other factors.
Conclusions:
- Increased NO generation plays a significant role in acute ischemic stroke.
- Elevated CSF NO-m levels are linked to more severe brain injury and a higher risk of neurological decline.