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Changes in hippocampal astrocyte morphology of Ruddy turnstone (Arenaria interpres) during the wintering period at the mangroves of Amazon River estuary.
Metadata
Journaljournal of chemical neuroanatomy2.353Date
2020 Jun 04
4 months ago
Type
Journal Article
Volume
2020-Oct / 108 : 101805
Author
da Costa ER 1, Henrique EP 2, da Silva JB 2, Pereira PDC 2, de Abreu CC 2, Fernandes TN 2, Magalhães NGM 2, de Jesus Falcão da Silva A 2, Guerreiro LCF 1, Diniz CG 2, Diniz CWP 3, Diniz DG 4
Affiliation
  • 2. Instituto Federal de Educação, Ciência e Tecnologia do Pará, Laboratório de Biologia Molecular e Neuroecologia, Rua da Escola Agrícola S/N, Vila Sinhá, CEP: 68.600-000, Bragança, Pará, Brazil.
  • 3. Universidade Federal do Pará, Instituto de Ciências Biológicas, Hospital Universitário João de Barros Barreto, Laboratório de Investigações em Neurodegeneração e Infecção, Rua dos Mundurucus, 4487, Guamá, CEP: 66.073-005, Belém, Pará, Brazil. Electronic address: [email protected]
  • 4. Universidade Federal do Pará, Instituto de Ciências Biológicas, Hospital Universitário João de Barros Barreto, Laboratório de Investigações em Neurodegeneração e Infecção, Rua dos Mundurucus, 4487, Guamá, CEP: 66.073-005, Belém, Pará, Brazil; Instituto Evandro Chagas, Laboratório de Microscopia Eletrônica, Avenida Almirante Barroso, 492, Marco, CEP: 66.093-020, Belém, Pará, Brazil.
Doi
PMIDMESH
Abstract
Astrocytes are essential for lipid neuronal metabolism in long-distance uninterrupted migratory flights, when glucose is not available as the main source of energy. We previously demonstrated in Calidris pusilla that after uninterrupted 5 days transatlantic flight, astrocytes shrink and reduce its number in the hippocampal formation. Here we shifted our attention to the wintering period and tested the hypothesis that hippocampal astrocyte morphology of A interpres will change as the wintering period progresses towards the premigration window. To that end we used Arenaria interpres, which also crosses the Atlantic Ocean and reaches the mangroves of the Amazon River estuary for wintering. Birds were captured in September/October (closer to the arrival in the coast of Bragança, Para, Brazil for wintering) and in April/May (closer to the departure towards the breeding sites) and had their brains processed for selective GFAP-astrocyte immunolabeling. Three-dimensional reconstructions of the immunostained astrocytes were performed and morphological classification was done based on hierarchical cluster and discriminant analysis of multimodal morphometric features. We found two morphological phenotypes of astrocytes in the newcomers which differentially increased its morphological complexities as wintering period progresses towards the pre-migration window. Taken together, our findings demonstrate that the long-distance non-stop flight and wintering period differentially affected the two astrocytes morphotypes, suggesting distinct physiological roles for these cells. We suggest that morphological changes during the wintering period, may be part of the adaptive plasticity of the local hippocampal circuits of A. interpres in preparation for the long journey back to their breeding sites in the north hemisphere.
Keywords: Arenaria interpres GFAP astrocytes Hippocampal formation Migratory birds Morphometry Wintering period
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2.4
J Chem Neuroanatjournal of chemical neuroanatomy
Metadata
LocationNetherlands
FromELSEVIER

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