Abstract
Background
Malignant infarction is characterized by the formation of cerebral edema, and medical treatment is limited. Preclinical data suggest that glyburide, an inhibitor of SUR1-TRPM4, is effective in preventing edema. We previously reported feasibility of the GAMES-Pilot study, a two-center prospective, open label, phase IIa trial of 10 subjects at high risk for malignant infarction based on diffusion weighted imaging (DWI) threshold of 82 cm3 treated with RP-1127 (glyburide for injection). In this secondary analysis, we tested the hypothesis that RP-1127 may be efficacious in preventing poor outcome when compared to controls.
Methods
Controls suffering large hemispheric infarction were obtained from the EPITHET and MMI-MRI studies. We first screened subjects for controls with the same DWI threshold used for enrollment into GAMES-Pilot, 82 cm3. Next, to address imbalances, we applied a weighted Euclidean matching. Ninety day mRS 0–4, rate of decompressive craniectomy, and mortality were the primary clinical outcomes of interest.
Results
The mean age of the GAMES cohort was 51 years and initial DWI volume was 102 ± 23 cm3. After Euclidean matching, GAMES subjects showed similar NIHSS, higher DWI volume, younger age and had mRS 0–4—90 % versus 50 % in controls p = 0.049; with a similar trend in mRS 0–3 (40 vs. 25 %; p = 0.43) and trend toward lower mortality (10 vs. 35 %; p = 0.21).
Conclusions
In this pilot study, RP-1127-treated subjects showed better clinical outcomes when compared to historical controls. An adequately powered and randomized phase II trial of patients at risk for malignant infarction is needed to evaluate the potential efficacy of RP-1127.
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Acknowledgements
The study PI (KNS) made all decisions regarding analysis and publication and assumes responsibility for the manuscript. The Stroke Outcomes Laboratory (TAK, PM) was supported by a Pilot Grant from the Institute for Clinical and Translational Research at the Baylor College of Medicine.
Clinical Trial Registration
URL: www.clinicaltrials.gov Identifier: NCT01268683.
Funding
The sponsor for this study was Remedy Pharmaceuticals, Inc.
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W. Taylor Kimberly has contributed equally to this study.
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Sheth, K.N., Taylor Kimberly, W., Elm, J.J. et al. Exploratory Analysis of Glyburide as a Novel Therapy for Preventing Brain Swelling. Neurocrit Care 21, 43–51 (2014). https://doi.org/10.1007/s12028-014-9970-2
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DOI: https://doi.org/10.1007/s12028-014-9970-2