Sedentary life and reduced mastication impair spatial learning and memory and differentially affect dentate gyrus astrocyte subtypes in the aged mice
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Digital do Instituto Evandro Chagas (Patuá) |
Texto Completo: | https://patua.iec.gov.br/handle/iec/4305 |
Resumo: | To explore the impact of reduced mastication and a sedentary lifestyle on spatial learning and memory in the aged mice, as well as on the morphology of astrocytes in the molecular layer of dentate gyrus (MolDG), different masticatory regimens were imposed. Control mice received a pellet-type hard diet, while the reduced masticatory activity group received a pellet diet followed by a powdered diet, and the masticatory rehabilitation group received a pellet diet, followed by powder diet and then a pellet again. To mimic sedentary or active lifestyles, mice were housed in an impoverished environment of standard cages or in an enriched environment. The Morris Water Maze (MWM) test showed that masticatory-deprived group, regardless of environment, was not able to learn and remember the hidden platform location, but masticatory rehabilitation combined with enriched environment recovered such disabilities. Microscopic three-dimensional reconstructions of 1,800 glial fibrillary acidic protein (GFAP)-immunolabeled astrocytes from the external third of the MolDG were generated using a stereological systematic and random sampling approach. Hierarchical cluster analysis allowed the characterization into two main groups of astrocytes with greater and lower morphological complexities, respectively, AST1 and AST2. When compared to the hard diet group subjected to impoverished environment, deprived animals maintained in the same environment for 6 months showed remarkable shrinkage of astrocyte branches. However, the long-term environmental enrichment (18-monthold) applied to the deprived group reversed the shrinkage effect, with significant increase in the morphological complexity of AST1 and AST2, when in an impoverished or enriched environment. During housing under enriched environment, complexity of branches of AST1 and AST2 was reduced by the powder diet (pellet followed by powder regimes) in young but not in old mice, where it was reversed by pellet diet (pellet followed by powder and pellet regime again). The same was not true for mice housed under impoverished environment. Interestingly, we were unable to find any correlation between MWM data and astrocyte morphological changes. Our findings indicate that both young and aged mice subjected to environmental enrichment, and under normal or rehabilitated masticatory activity, preserve spatial learning and memory. Nonetheless, data suggest that an impoverished environment and reduced mastication synergize to aggravate age-related cognitive decline; however, the association with morphological diversity of AST1 and AST2 at the MolDG requires further investigation. |
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Mendes, Fabíola de Carvalho Chaves de SiqueiraPaixão, Luisa Taynah Vasconcelos BarbosaDiniz, Daniel GuerreiroAnthony, Daniel CliveBrites, DoraDiniz, Cristovam Wanderley PicançoSosthenes, Marcia Consentino Kronka2021-05-13T00:01:09Z2021-05-13T00:01:09Z2021MENDES, Fabíola de Carvalho Chaves de Siqueira et al. Sedentary life and reduced mastication impair spatial learning and memory and differentially affect dentate gyrus astrocyte subtypes in the aged mice. Frontiers in Neuroscience, v. 15, n. 632216, Apr. 2021.1662-453Xhttps://patua.iec.gov.br/handle/iec/430510.3389/fnins.2021.632216To explore the impact of reduced mastication and a sedentary lifestyle on spatial learning and memory in the aged mice, as well as on the morphology of astrocytes in the molecular layer of dentate gyrus (MolDG), different masticatory regimens were imposed. Control mice received a pellet-type hard diet, while the reduced masticatory activity group received a pellet diet followed by a powdered diet, and the masticatory rehabilitation group received a pellet diet, followed by powder diet and then a pellet again. To mimic sedentary or active lifestyles, mice were housed in an impoverished environment of standard cages or in an enriched environment. The Morris Water Maze (MWM) test showed that masticatory-deprived group, regardless of environment, was not able to learn and remember the hidden platform location, but masticatory rehabilitation combined with enriched environment recovered such disabilities. Microscopic three-dimensional reconstructions of 1,800 glial fibrillary acidic protein (GFAP)-immunolabeled astrocytes from the external third of the MolDG were generated using a stereological systematic and random sampling approach. Hierarchical cluster analysis allowed the characterization into two main groups of astrocytes with greater and lower morphological complexities, respectively, AST1 and AST2. When compared to the hard diet group subjected to impoverished environment, deprived animals maintained in the same environment for 6 months showed remarkable shrinkage of astrocyte branches. However, the long-term environmental enrichment (18-monthold) applied to the deprived group reversed the shrinkage effect, with significant increase in the morphological complexity of AST1 and AST2, when in an impoverished or enriched environment. During housing under enriched environment, complexity of branches of AST1 and AST2 was reduced by the powder diet (pellet followed by powder regimes) in young but not in old mice, where it was reversed by pellet diet (pellet followed by powder and pellet regime again). The same was not true for mice housed under impoverished environment. Interestingly, we were unable to find any correlation between MWM data and astrocyte morphological changes. Our findings indicate that both young and aged mice subjected to environmental enrichment, and under normal or rehabilitated masticatory activity, preserve spatial learning and memory. Nonetheless, data suggest that an impoverished environment and reduced mastication synergize to aggravate age-related cognitive decline; however, the association with morphological diversity of AST1 and AST2 at the MolDG requires further investigation.Brazilian Research Council CNPq (grant number 475677/2008-0) Fundação Amazônia Paraense de Amparo à Pesquisa (FAPESPA, grant number 136/08). Fundação de Amparo e Desenvolvimento da Pesquisa (FADESP) and the Pró-Reitoria de Pesquisa e Pós-Graduação (PROPESP/UFPA) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES). Programa Nacional de Cooperação Acadêmica da Amazônia – DRI (Processo CAPES No. 88881.370785/2019-01). Fundação para a Ciência e a Tecnologia (PTDC/MED-NEU/31395/2017, LISBOA-01-0145-FEDER031395, and UID/DTP/04138/2018-2021), Santa Casa da Misericórdia (ALS Research Grant).Universidade Federal do Pará. Instituto de Ciências Biológicas. Hospital Universitário João de Barros Barreto. Laboratório de Investigações em Neurodegeneração e Infecção. Belém, PA, Brazil / Centro Universitário do Estado do Pará. Curso de Medicina. Belém, PA, Brazil.Universidade Federal do Pará. Instituto de Ciências Biológicas. Hospital Universitário João de Barros Barreto. Laboratório de Investigações em Neurodegeneração e Infecção. Belém, PA, Brazil.Universidade Federal do Pará. Instituto de Ciências Biológicas. Hospital Universitário João de Barros Barreto. Laboratório de Investigações em Neurodegeneração e Infecção. Belém, PA, Brazil / Ministério da Saúde. Secretaria de Vigilância em Saúde. Instituto Evandro Chagas. Laboratório de Microscopia Eletrônica. Ananindeua, PA, Brasil.University of Oxford. Department of Pharmacology. Laboratory of Experimental Neuropathology. Oxford, United Kingdom.Universidade de Lisboa. Faculty of Pharmacy. Research Institute for Medicines. Lisbon, Portugal / Universidade de Lisboa. Faculty of Pharmacy. Department of Biochemistry and Human Biology. Lisbon, Portugal.Universidade Federal do Pará. Instituto de Ciências Biológicas. Hospital Universitário João de Barros Barreto. Laboratório de Investigações em Neurodegeneração e Infecção. Belém, PA, Brazil.Universidade Federal do Pará. Instituto de Ciências Biológicas. Hospital Universitário João de Barros Barreto. Laboratório de Investigações em Neurodegeneração e Infecção. 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dc.title.pt_BR.fl_str_mv |
Sedentary life and reduced mastication impair spatial learning and memory and differentially affect dentate gyrus astrocyte subtypes in the aged mice |
title |
Sedentary life and reduced mastication impair spatial learning and memory and differentially affect dentate gyrus astrocyte subtypes in the aged mice |
spellingShingle |
Sedentary life and reduced mastication impair spatial learning and memory and differentially affect dentate gyrus astrocyte subtypes in the aged mice Mendes, Fabíola de Carvalho Chaves de Siqueira Astrócitos Envelhecimento Giro Denteado Mastigação Reabilitação Memória / fisiologia Comportamento Sedentário |
title_short |
Sedentary life and reduced mastication impair spatial learning and memory and differentially affect dentate gyrus astrocyte subtypes in the aged mice |
title_full |
Sedentary life and reduced mastication impair spatial learning and memory and differentially affect dentate gyrus astrocyte subtypes in the aged mice |
title_fullStr |
Sedentary life and reduced mastication impair spatial learning and memory and differentially affect dentate gyrus astrocyte subtypes in the aged mice |
title_full_unstemmed |
Sedentary life and reduced mastication impair spatial learning and memory and differentially affect dentate gyrus astrocyte subtypes in the aged mice |
title_sort |
Sedentary life and reduced mastication impair spatial learning and memory and differentially affect dentate gyrus astrocyte subtypes in the aged mice |
author |
Mendes, Fabíola de Carvalho Chaves de Siqueira |
author_facet |
Mendes, Fabíola de Carvalho Chaves de Siqueira Paixão, Luisa Taynah Vasconcelos Barbosa Diniz, Daniel Guerreiro Anthony, Daniel Clive Brites, Dora Diniz, Cristovam Wanderley Picanço Sosthenes, Marcia Consentino Kronka |
author_role |
author |
author2 |
Paixão, Luisa Taynah Vasconcelos Barbosa Diniz, Daniel Guerreiro Anthony, Daniel Clive Brites, Dora Diniz, Cristovam Wanderley Picanço Sosthenes, Marcia Consentino Kronka |
author2_role |
author author author author author author |
dc.contributor.author.fl_str_mv |
Mendes, Fabíola de Carvalho Chaves de Siqueira Paixão, Luisa Taynah Vasconcelos Barbosa Diniz, Daniel Guerreiro Anthony, Daniel Clive Brites, Dora Diniz, Cristovam Wanderley Picanço Sosthenes, Marcia Consentino Kronka |
dc.subject.decsPrimary.pt_BR.fl_str_mv |
Astrócitos Envelhecimento Giro Denteado Mastigação Reabilitação Memória / fisiologia Comportamento Sedentário |
topic |
Astrócitos Envelhecimento Giro Denteado Mastigação Reabilitação Memória / fisiologia Comportamento Sedentário |
description |
To explore the impact of reduced mastication and a sedentary lifestyle on spatial learning and memory in the aged mice, as well as on the morphology of astrocytes in the molecular layer of dentate gyrus (MolDG), different masticatory regimens were imposed. Control mice received a pellet-type hard diet, while the reduced masticatory activity group received a pellet diet followed by a powdered diet, and the masticatory rehabilitation group received a pellet diet, followed by powder diet and then a pellet again. To mimic sedentary or active lifestyles, mice were housed in an impoverished environment of standard cages or in an enriched environment. The Morris Water Maze (MWM) test showed that masticatory-deprived group, regardless of environment, was not able to learn and remember the hidden platform location, but masticatory rehabilitation combined with enriched environment recovered such disabilities. Microscopic three-dimensional reconstructions of 1,800 glial fibrillary acidic protein (GFAP)-immunolabeled astrocytes from the external third of the MolDG were generated using a stereological systematic and random sampling approach. Hierarchical cluster analysis allowed the characterization into two main groups of astrocytes with greater and lower morphological complexities, respectively, AST1 and AST2. When compared to the hard diet group subjected to impoverished environment, deprived animals maintained in the same environment for 6 months showed remarkable shrinkage of astrocyte branches. However, the long-term environmental enrichment (18-monthold) applied to the deprived group reversed the shrinkage effect, with significant increase in the morphological complexity of AST1 and AST2, when in an impoverished or enriched environment. During housing under enriched environment, complexity of branches of AST1 and AST2 was reduced by the powder diet (pellet followed by powder regimes) in young but not in old mice, where it was reversed by pellet diet (pellet followed by powder and pellet regime again). The same was not true for mice housed under impoverished environment. Interestingly, we were unable to find any correlation between MWM data and astrocyte morphological changes. Our findings indicate that both young and aged mice subjected to environmental enrichment, and under normal or rehabilitated masticatory activity, preserve spatial learning and memory. Nonetheless, data suggest that an impoverished environment and reduced mastication synergize to aggravate age-related cognitive decline; however, the association with morphological diversity of AST1 and AST2 at the MolDG requires further investigation. |
publishDate |
2021 |
dc.date.accessioned.fl_str_mv |
2021-05-13T00:01:09Z |
dc.date.available.fl_str_mv |
2021-05-13T00:01:09Z |
dc.date.issued.fl_str_mv |
2021 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
MENDES, Fabíola de Carvalho Chaves de Siqueira et al. Sedentary life and reduced mastication impair spatial learning and memory and differentially affect dentate gyrus astrocyte subtypes in the aged mice. Frontiers in Neuroscience, v. 15, n. 632216, Apr. 2021. |
dc.identifier.uri.fl_str_mv |
https://patua.iec.gov.br/handle/iec/4305 |
dc.identifier.issn.-.fl_str_mv |
1662-453X |
dc.identifier.doi.-.fl_str_mv |
10.3389/fnins.2021.632216 |
identifier_str_mv |
MENDES, Fabíola de Carvalho Chaves de Siqueira et al. Sedentary life and reduced mastication impair spatial learning and memory and differentially affect dentate gyrus astrocyte subtypes in the aged mice. Frontiers in Neuroscience, v. 15, n. 632216, Apr. 2021. 1662-453X 10.3389/fnins.2021.632216 |
url |
https://patua.iec.gov.br/handle/iec/4305 |
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eng |
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eng |
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Frontiers Media |
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Frontiers Media |
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