Cardiac Glycosides Provide Neuroprotection Against Ischemic Stroke: Discovery by a Brain Slice-Based Compound Screening Platform
Cardiac glycosides provide neuroprotection against ischemic stroke: Discovery by a brain slice-based compound screening platform James K. T. Wang*†, Stuart Portbury*‡, Mary Beth Thomas*§, Shawn Barney*, Daniel J. Ricca*, Dexter L. Morris*¶, David S. Warnerʈ, and Donald C. Lo*,**†† *Cogent Neuroscience, Inc., Durham, NC 27704; ʈMultidisciplinary Neuroprotection Laboratories and Department of Anesthesiology, Duke University Medical Center, Durham, NC 27710; and **Center for Drug Discovery and Department of Neurobiology, Duke University Medical Center, Durham, NC 27704 Edited by Charles F. Stevens, The Salk Institute for Biological Studies, La Jolla, CA, and approved May 17, 2006 (received for review February 3, 2006) We report here the results of a chemical genetic screen using small intrinsically problematic for a number of reasons, including inher- molecules with known pharmacologies coupled with a cortical ent limitations on therapeutic time window and clinically limiting brain slice-based model for ischemic stroke. We identified a small- side-effect profiles. Consequently, much attention has been focused molecule compound not previously appreciated to have neuropro- in recent years on using genomic, proteomic, and other systems tective action in ischemic stroke, the cardiac glycoside neriifolin, biology approaches in identifying new drug target candidates for and demonstrated that its properties in the brain slice assay stroke drug intervention (see review in ref. 5). included delayed therapeutic potential exceeding 6 h. Neriifolin is In this context we developed a tissue-based, high-content assay structurally related to the digitalis class of cardiac glycosides, and model for ischemic stroke based on biolistic transfection of visual ؉ ؉ its putative target is the Na ͞K -ATPase.
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