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Cellular mechanisms underlying the effects of an early experience on cognitive abilities and affective states
In the present study we investigated the effects of neonatal handling, an animal model of early experience, on spatial learning and memory, on hippocampal glucocorticoid (GR), mineralocorticoid (MR) and type 1A serotonin (5-HT1A) receptors, as well as brain derived neurotrophic factor (BDNF), and on...
Autores principales: | , , , , , |
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Formato: | Texto |
Lenguaje: | English |
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BioMed Central
2005
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1090442/ https://www.ncbi.nlm.nih.gov/pubmed/15876359 http://dx.doi.org/10.1186/1744-859X-4-8 |
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author | Garoflos, Efstathios Panagiotaropoulos, Theofanis Pondiki, Stavroula Stamatakis, Antonios Philippidis, Eleni Stylianopoulou, Fotini |
author_facet | Garoflos, Efstathios Panagiotaropoulos, Theofanis Pondiki, Stavroula Stamatakis, Antonios Philippidis, Eleni Stylianopoulou, Fotini |
author_sort | Garoflos, Efstathios |
collection | PubMed |
description | In the present study we investigated the effects of neonatal handling, an animal model of early experience, on spatial learning and memory, on hippocampal glucocorticoid (GR), mineralocorticoid (MR) and type 1A serotonin (5-HT1A) receptors, as well as brain derived neurotrophic factor (BDNF), and on circulating leptin levels, of male rats. METHOD: Spatial learning and memory following an acute restraint stress (30 min) were assessed in the Morris water maze. Hippocampal GR, MR and BDNF levels were determined immunocytochemically. 5-HT1A receptors were quantified by in vitro binding autoradiography. Circulating leptin levels, following a chronic forced swimming stress, were measured by radioimmunoassay (RIA). Data were statistically analyzed by analysis of variance (ANOVA). RESULTS: Neonatal handling increased the ability of male rats for spatial learning and memory. It also resulted in increased GR/MR ratio, BDNF and 5-HT1A receptor levels in the hippocampus. Furthermore, leptin levels, body weight and food consumption during chronic forced swimming stress were reduced as a result of handling. CONCLUSION: Neonatal handling is shown to have a beneficial effect in the males, improving their cognitive abilities. This effect on behavior could be mediated by the handling-induced increase in hippocampal GR/MR ratio and BDNF levels. The handling-induced changes in BDNF and 5-HT1A receptors could underlie the previously documented effect of handling in preventing "depression". Furthermore, handling is shown to prevent other maladaptive states such as stress-induced hyperphagia, obesity and resistance to leptin. |
format | Text |
id | pubmed-1090442 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2005 |
publisher | BioMed Central |
record_format | MEDLINE/PubMed |
spelling | pubmed-10904422005-05-06 Cellular mechanisms underlying the effects of an early experience on cognitive abilities and affective states Garoflos, Efstathios Panagiotaropoulos, Theofanis Pondiki, Stavroula Stamatakis, Antonios Philippidis, Eleni Stylianopoulou, Fotini Ann Gen Psychiatry Primary Research In the present study we investigated the effects of neonatal handling, an animal model of early experience, on spatial learning and memory, on hippocampal glucocorticoid (GR), mineralocorticoid (MR) and type 1A serotonin (5-HT1A) receptors, as well as brain derived neurotrophic factor (BDNF), and on circulating leptin levels, of male rats. METHOD: Spatial learning and memory following an acute restraint stress (30 min) were assessed in the Morris water maze. Hippocampal GR, MR and BDNF levels were determined immunocytochemically. 5-HT1A receptors were quantified by in vitro binding autoradiography. Circulating leptin levels, following a chronic forced swimming stress, were measured by radioimmunoassay (RIA). Data were statistically analyzed by analysis of variance (ANOVA). RESULTS: Neonatal handling increased the ability of male rats for spatial learning and memory. It also resulted in increased GR/MR ratio, BDNF and 5-HT1A receptor levels in the hippocampus. Furthermore, leptin levels, body weight and food consumption during chronic forced swimming stress were reduced as a result of handling. CONCLUSION: Neonatal handling is shown to have a beneficial effect in the males, improving their cognitive abilities. This effect on behavior could be mediated by the handling-induced increase in hippocampal GR/MR ratio and BDNF levels. The handling-induced changes in BDNF and 5-HT1A receptors could underlie the previously documented effect of handling in preventing "depression". Furthermore, handling is shown to prevent other maladaptive states such as stress-induced hyperphagia, obesity and resistance to leptin. BioMed Central 2005-04-06 /pmc/articles/PMC1090442/ /pubmed/15876359 http://dx.doi.org/10.1186/1744-859X-4-8 Text en Copyright © 2005 Garoflos et al; licensee BioMed Central Ltd. http://creativecommons.org/licenses/by/2.0 This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( (http://creativecommons.org/licenses/by/2.0) ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Primary Research Garoflos, Efstathios Panagiotaropoulos, Theofanis Pondiki, Stavroula Stamatakis, Antonios Philippidis, Eleni Stylianopoulou, Fotini Cellular mechanisms underlying the effects of an early experience on cognitive abilities and affective states |
title | Cellular mechanisms underlying the effects of an early experience on cognitive abilities and affective states |
title_full | Cellular mechanisms underlying the effects of an early experience on cognitive abilities and affective states |
title_fullStr | Cellular mechanisms underlying the effects of an early experience on cognitive abilities and affective states |
title_full_unstemmed | Cellular mechanisms underlying the effects of an early experience on cognitive abilities and affective states |
title_short | Cellular mechanisms underlying the effects of an early experience on cognitive abilities and affective states |
title_sort | cellular mechanisms underlying the effects of an early experience on cognitive abilities and affective states |
topic | Primary Research |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1090442/ https://www.ncbi.nlm.nih.gov/pubmed/15876359 http://dx.doi.org/10.1186/1744-859X-4-8 |
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