Minimal long-term neurobehavioral impairments after endovascular perforation subarachnoid hemorrhage in mice

Claudia Fanizzi, Andrew D. Sauerbeck, Mihika Gangolli, Gregory J. Zipfel, David L. Brody & Terrance T. Kummer. 2017 Scientific Reports Volume 7, Issue 1, Article number 7569 Read More

Abstract

Cognitive deficits are among the most severe and pervasive consequences of aneurysmal subarachnoid hemorrhage (SAH). A critical step in developing therapies targeting such outcomes is the characterization of experimentally-tractable pre-clinical models that exhibit multi-domain neurobehavioral deficits similar to those afflicting humans. We therefore searched for neurobehavioral abnormalities following endovascular perforation induction of SAH in mice, a heavily-utilized model. We instituted a functional screen to manage variability in injury severity, then assessed acute functional deficits, as well as activity, anxiety-related behavior, learning and memory, socialization, and depressive-like behavior at sub-acute and chronic time points (up to 1 month post-injury). Animals in which SAH was induced exhibited reduced acute functional capacity and reduced general activity to 1 month post-injury. Tests of anxiety-related behavior including central area time in the elevated plus maze and thigmotaxis in the open field test revealed increased anxiety-like behavior at subacute and chronic time-points, respectively. Effect sizes for subacute and chronic neurobehavioral endpoints in other domains, however, were small. In combination with persistent variability, this led to non-significant effects of injury on all remaining neurobehavioral outcomes. These results suggest that, with the exception of anxiety-related behavior, alternate mouse models are required to effectively analyze cognitive outcomes after SAH. © 2017 The Author(s).

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Posted on August 25, 2017
Posted in: Axon Injury & Repair, HPAN, Neurodegeneration, Neurogenetics & Transcriptomics, NeuroRestorative Therapy, Neurovascular Injury & Repair, Pilot Projects, Publications Authors: , ,