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Giglia G, Agliani G, Lepri E, Baldoni E, Gobbi M, Ceccherelli R, Gröne A, van den Brand JMA, Mandara MT. Neuronal satellitosis is a common finding in the avian brain. Avian Pathol 2022; 51:381-387. [PMID: 35503252 DOI: 10.1080/03079457.2022.2073193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
AbstractPerineuronal or neuronal satellitosis is the term describing the presence of glial cells in the satellite space surrounding the neuronal perikaryon. Confusingly, this finding has been described both as a physiologic and pathologic condition in humans and animals. In animals, neuronal satellitosis has been described in mammals, as well as in avian species. For the latter, authors wondered whether this finding can be expressed in the normal telencephalon of different avian orders and families and whether this pattern in different species shows a specific brain-region association. For these aims, this study explored the presence of neuronal satellitosis in the major areas of the healthy telencephalon in wild avian species of different orders and families, evaluating its grade in different brain regions. Neuronal satellitosis was seen in the Hyperpallium and Mesopallium as areas with the highest grade. Passeriformes showed the highest grade of neuronal satellitosis compared to Diurnal, Nocturnal raptors, and Charadriiformes. To clarify the exact role of neuronal satellitosis in animals without neurological disease further studies are needed.
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Affiliation(s)
- Giuseppe Giglia
- Department of Veterinary Medicine, University of Perugia, Via San Costanzo, 4, 06126 Perugia, Italy.,Division of Pathology, Department of Biomolecular Health Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 1, 3584 CL Utrecht, The Netherlands
| | - Gianfilippo Agliani
- Division of Pathology, Department of Biomolecular Health Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 1, 3584 CL Utrecht, The Netherlands
| | - Elvio Lepri
- Department of Veterinary Medicine, University of Perugia, Via San Costanzo, 4, 06126 Perugia, Italy
| | - Erika Baldoni
- Department of Veterinary Medicine, University of Perugia, Via San Costanzo, 4, 06126 Perugia, Italy
| | - Marco Gobbi
- Department of Veterinary Medicine, University of Perugia, Via San Costanzo, 4, 06126 Perugia, Italy.,Diagnostic Department, Istituto Zooprofilattico Sperimentale dell'Umbria e delle Marche, Via Gaetano Salvemini, 1, 06126 Perugia, Italy
| | - Renato Ceccherelli
- Centro Recupero Uccelli Marini e Acquatici (CRUMA), Via delle Sorgenti, 430, 57121 Livorno, Italy
| | - Andrea Gröne
- Division of Pathology, Department of Biomolecular Health Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 1, 3584 CL Utrecht, The Netherlands
| | - Judith M A van den Brand
- Division of Pathology, Department of Biomolecular Health Sciences, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 1, 3584 CL Utrecht, The Netherlands
| | - Maria Teresa Mandara
- Department of Veterinary Medicine, University of Perugia, Via San Costanzo, 4, 06126 Perugia, Italy
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Ikeda MZ, Krentzel AA, Oliver TJ, Scarpa GB, Remage-Healey L. Clustered organization and region-specific identities of estrogen-producing neurons in the forebrain of Zebra Finches (Taeniopygia guttata). J Comp Neurol 2017; 525:3636-3652. [PMID: 28758205 PMCID: PMC6035364 DOI: 10.1002/cne.24292] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Revised: 07/18/2017] [Accepted: 07/20/2017] [Indexed: 01/03/2023]
Abstract
A fast, neuromodulatory role for estrogen signaling has been reported in many regions of the vertebrate brain. Regional differences in the cellular distribution of aromatase (estrogen synthase) in several species suggest that mechanisms for neuroestrogen signaling differ between and even within brain regions. A more comprehensive understanding of neuroestrogen signaling depends on characterizing the cellular identities of neurons that express aromatase. Calcium-binding proteins such as parvalbumin and calbindin are molecular markers for interneuron subtypes, and are co-expressed with aromatase in human temporal cortex. Songbirds like the zebra finch have become important models to understand the brain synthesis of steroids like estrogens and the implications for neurobiology and behavior. Here, we investigated the regional differences in cytoarchitecture and cellular identities of aromatase-expressing neurons in the auditory and sensorimotor forebrain of zebra finches. Aromatase was co-expressed with parvalbumin in the caudomedial nidopallium (NCM) and HVC shelf (proper name) but not in the caudolateral nidopallium (NCL) or hippocampus. By contrast, calbindin was not co-expressed with aromatase in any region investigated. Notably, aromatase-expressing neurons were found in dense somato-somatic clusters, suggesting a coordinated release of local neuroestrogens from clustered neurons. Aromatase clusters were also more abundant and tightly packed in the NCM of males as compared to females. Overall, this study provides new insights into neuroestrogen regulation at the network level, and extends previous findings from human cortex by identifying a subset of aromatase neurons as putative inhibitory interneurons.
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Affiliation(s)
- Maaya Z Ikeda
- Molecular and Cellular Biology Program, University of Massachusetts, Amherst, Massachusetts
- Department of Psychological and Brain Sciences, University of Massachusetts, Amherst, Massachusetts
| | - Amanda A Krentzel
- Neuroscience and Behavior Program, University of Massachusetts, Amherst, Massachusetts
- Department of Psychological and Brain Sciences, University of Massachusetts, Amherst, Massachusetts
| | - Tessa J Oliver
- Department of Psychological and Brain Sciences, University of Massachusetts, Amherst, Massachusetts
| | - Garrett B Scarpa
- Department of Psychological and Brain Sciences, University of Massachusetts, Amherst, Massachusetts
| | - Luke Remage-Healey
- Molecular and Cellular Biology Program, University of Massachusetts, Amherst, Massachusetts
- Neuroscience and Behavior Program, University of Massachusetts, Amherst, Massachusetts
- Department of Psychological and Brain Sciences, University of Massachusetts, Amherst, Massachusetts
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