Abstract

LEON, Rilda et al. Experimental Model of Cerebral Hypoperfusion Produced Memory-learning Deficits, and Modifications in Gene Expression. Acta biol.Colomb. [online]. 2015, vol.20, n.1, pp.15-25. ISSN 0120-548X.  https://doi.org/10.15446/abc.v20n1.40976.

Cerebral ischemia is a major cause of death, for this reason animal models of cerebral ischemia are widely used to study both the pathophysiology of ischemic phenomenon and the evaluation of possible therapeutic agents with protective or regenerative properties. The objectives of this study were to examine the presence of neuronal damage in different brain areas following the ischemic event, and assess consequences of such activities on the processes of memory and learning. The study group included an experimental group ischemic animals (30 rats with permanent bilateral occlusion of the carotids), and a control group. Was evaluated gene expression and inflammatory ischemic by qPCR techniques 24h post injury, brain tissue morphology in areas of cortex, striatum and hippocampus seven days post injury and processes of memory and learning, 12 days post injury. The morphological studies showed that the procedure induces death of cell populations in cortex, striatum and hippocampus, ischemia modified gfap gene expression and ho, il-6, il-17 and ifn-γ, which can be used as a marker of early ischemic process. Additionally, the ischemic injury caused spatial memory decline. This characterization gives us an experimental model to develop future studies on the pathophysiology of ischemic events and assessing therapeutic strategies.

Keywords : brain hypoxia-ischemia; experimental animal models; gene expression; interleukin; memory.

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