Early reduced behavioral activity induced by large strokes affects the efficiency of enriched environment in rats.

Autor:	Wahl AS; Brain Research Institute, University of Zurich, Zurich, Switzerland.; Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland.; Central Institute of Mental Health, University of Heidelberg, Mannheim, Germany., Erlebach E; Brain Research Institute, University of Zurich, Zurich, Switzerland.; Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland., Brattoli B; Computer Vision Group, Interdisciplinary Center for Scientific Computing (IWR), University of Heidelberg, Heidelberg, Germany., Büchler U; Computer Vision Group, Interdisciplinary Center for Scientific Computing (IWR), University of Heidelberg, Heidelberg, Germany., Kaiser J; Brain Research Institute, University of Zurich, Zurich, Switzerland.; Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland., Ineichen BV; Brain Research Institute, University of Zurich, Zurich, Switzerland.; Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland., Mosberger AC; Brain Research Institute, University of Zurich, Zurich, Switzerland.; Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland., Schneeberger S; Brain Research Institute, University of Zurich, Zurich, Switzerland.; Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland., Imobersteg S; Brain Research Institute, University of Zurich, Zurich, Switzerland.; Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland., Wieckhorst M; Brain Research Institute, University of Zurich, Zurich, Switzerland.; Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland., Stirn M; Clinical Laboratory, University of Zurich, Zurich, Switzerland., Schroeter A; Institute for Biomedical Imaging, ETH Zurich, Zurich, Switzerland., Ommer B; Computer Vision Group, Interdisciplinary Center for Scientific Computing (IWR), University of Heidelberg, Heidelberg, Germany., Schwab ME; Brain Research Institute, University of Zurich, Zurich, Switzerland.; Department of Health Sciences and Technology, ETH Zurich, Zurich, Switzerland.
Jazyk:	angličtina
Zdroj:	Journal of cerebral blood flow and metabolism : official journal of the International Society of Cerebral Blood Flow and Metabolism [J Cereb Blood Flow Metab] 2019 Oct; Vol. 39 (10), pp. 2022-2034. Date of Electronic Publication: 2018 May 17.
DOI:	10.1177/0271678X18777661
Abstrakt:	The majority of stroke patients develop post-stroke fatigue, a symptom which impairs motivation and diminishes the success of rehabilitative interventions. We show that large cortical strokes acutely reduce activity levels in rats for 1-2 weeks as a physiological response paralleled by signs of systemic inflammation. Rats were exposed early (1-2 weeks) or late (3-4 weeks after stroke) to an individually monitored enriched environment to stimulate self-controlled high-intensity sensorimotor training. A group of animals received Anti-Nogo antibodies for the first two weeks after stroke, a neuronal growth promoting immunotherapy already in clinical trials. Early exposure to the enriched environment resulted in poor outcome: Training intensity was correlated to enhanced systemic inflammation and functional impairment. In contrast, animals starting intense sensorimotor training two weeks after stroke preceded by the immunotherapy revealed better recovery with functional outcome positively correlated to the training intensity and the extent of re-innervation of the stroke denervated cervical hemi-cord. Our results suggest stroke-induced fatigue as a biological purposeful reaction of the organism during neuronal remodeling, enabling new circuit formation which will then be stabilized or pruned in the subsequent rehabilitative training phase. However, intense training too early may lead to wrong connections and is thus less effective.
Databáze:	MEDLINE
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