alexa Early blood-brain barrier disruption in human focal brain ischemia.
Pharmaceutical Sciences

Pharmaceutical Sciences

Biochemistry & Pharmacology: Open Access

Author(s): Latour LL, Kang DW, Ezzeddine MA, Chalela JA, Warach S

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Abstract Loss of integrity of the blood-brain barrier (BBB) resulting from ischemia/reperfusion is believed to be a precursor to hemorrhagic transformation (HT) and poor outcome. We used a novel magnetic resonance imaging marker to characterize early BBB disruption in human focal brain ischemia and tested for associations with reperfusion, HT, and poor outcome (modified Rankin score >2). BBB disruption was found in 47 of 144 (33\%) patients, having a median time from stroke onset to observation of 10.1 hours. Reperfusion was found to be the most powerful independent predictor of early BBB disruption (p = 0.018; odds ratio, 4.09; 95\% confidence interval, 1.28-13.1). HT was observed in 22 patients; 16 (72.7\%) of those also had early BBB disruption (p < 0.001; odds ratio, 8.11; 95\% confidence interval, 2.85-23.1). In addition to baseline severity (National Institutes of Health Stroke Scale score >6), early BBB disruption was found to be an independent predictor of HT. Because the timing of the disruption was early enough to make it relevant to acute thrombolytic therapy, early BBB disruption as defined by this imaging biomarker may be a promising target for adjunctive therapy to reduce the complications associated with thrombolytic therapy, broaden the therapeutic window, and improve clinical outcome. This article was published in Ann Neurol and referenced in Biochemistry & Pharmacology: Open Access

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