Melanin-concentrating hormone (MCH) modifies memory retention in rats |
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Authors: | Monzon M E de Souza M M Izquierdo L A Izquierdo I Barros D M de Barioglio S R |
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Affiliation: | Departamento de Farmacología, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Argentina. memonzon.epractica@mater.fcm.unc.edu.ar |
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Abstract: | The purpose of the present study was to evaluate the possible effect of melanin-concentrating hormone (MCH) on learning and memory by using the one-trial step-down inhibitory avoidance test in rats. The peptide was infused into hippocampus, amygdala, and entorhinal cortex. MCH caused retrograde facilitation when given at 0 or 4 h post-training into hippocampus, but only at 0 h into amygdala. From these results, it seems that MCH modulates memory early after training by acting on both the amygdala and hippocampus and, 4 h after training, on the hippocampus. |
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