Abstract
Background
Brain edema is a serious complication of ischemic stroke that can lead to secondary neurological deterioration and death. Glyburide is reported to prevent brain swelling in preclinical rodent models of ischemic stroke through inhibition of a non-selective channel composed of sulfonylurea receptor 1 and transient receptor potential cation channel subfamily M member 4. However, the relevance of this pathway to the development of cerebral edema in stroke patients is not known.
Methods
Using a case–control design, we retrospectively assessed neuroimaging and blood markers of cytotoxic and vasogenic edema in subjects who were enrolled in the glyburide advantage in malignant edema and stroke-pilot (GAMES-Pilot) trial. We compared serial brain magnetic resonance images (MRIs) to a cohort with similar large volume infarctions. We also compared matrix metalloproteinase-9 (MMP-9) plasma level in large hemispheric stroke.
Results
We report that IV glyburide was associated with T2 fluid-attenuated inversion recovery signal intensity ratio on brain MRI, diminished the lesional water diffusivity between days 1 and 2 (pseudo-normalization), and reduced blood MMP-9 level.
Conclusions
Several surrogate markers of vasogenic edema appear to be reduced in the setting of IV glyburide treatment in human stroke. Verification of these potential imaging and blood biomarkers is warranted in the context of a randomized, placebo-controlled trial.
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Acknowledgments
This work was supported by the National Institutes of Health/National Institute of Neurological Diseases and Stroke (K23 NS076597, W.T.K.). Some of the samples and data used in this research were originally collected with funding through the NIH (P50 NS051343, K.L.F. and R01 NS051412, A.B.S.) or through Remedy Pharmaceuticals, Inc (GAMES-Pilot study).
Disclosures
W.T.K discloses a research Grant (NIH; significant). The GAMES-Pilot study (NCT01268683) was funded by Remedy Pharmaceuticals, Inc. and the sponsor had no role in the preparation of this manuscript.
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Kimberly, W.T., Battey, T.W.K., Pham, L. et al. Glyburide is Associated with Attenuated Vasogenic Edema in Stroke Patients. Neurocrit Care 20, 193–201 (2014). https://doi.org/10.1007/s12028-013-9917-z
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DOI: https://doi.org/10.1007/s12028-013-9917-z