Localization of choline acetyltransferase (ChAT) immunoreactivity in the brain of a caecilian amphibian, Dermophis mexicanus (Amphibia: Gymnophiona)
Identifieur interne : 001398 ( Main/Merge ); précédent : 001397; suivant : 001399Localization of choline acetyltransferase (ChAT) immunoreactivity in the brain of a caecilian amphibian, Dermophis mexicanus (Amphibia: Gymnophiona)
Auteurs : Agustín González [Espagne] ; Jesús M. L Pez [Espagne] ; Cristina Sánchez-Camacho [Espagne] ; Oscar Marín [États-Unis]Source :
- Journal of Comparative Neurology [ 0021-9967 ] ; 2002-07-01.
English descriptors
Abstract
The organization of the cholinergic system in the brain of anuran and urodele amphibians was recently studied, and significant differences were noted between both amphibian orders. However, comparable data are not available for the third order of amphibians, the limbless gymnophionans (caecilians). To further assess general and derived features of the cholinergic system in amphibians, we have investigated the distribution of choline acetyltransferase immunoreactive (ChAT‐ir) cell bodies and fibers in the brain of the gymnophionan Dermophis mexicanus. This distribution showed particular features of gymnophionans such as the existence of a particularly large cholinergic population in the striatum, the presence of ChAT‐ir cells in the mesencephalic tectum, and the organization of the cranial nerve motor nuclei. These peculiarities probably reflect major adaptations of gymnophionans to a fossorial habit. Comparison of our results with those in other vertebrates, including a segmental approach to correlate cell populations across species, shows that the general pattern of organization of cholinergic systems in vertebrates can be modified in certain species in response to adaptative processes that lead to morphological and behavioral modifications of members of a given class of vertebrates, as shown for gymnophionans. J. Comp. Neurol. 448:249–267, 2002. © 2002 Wiley‐Liss, Inc.
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DOI: 10.1002/cne.10233
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L Pez</name></author><author><name sortKey="Sanchez Amacho, Cristina" sort="Sanchez Amacho, Cristina" uniqKey="Sanchez Amacho C" first="Cristina" last="Sánchez-Camacho">Cristina Sánchez-Camacho</name></author><author><name sortKey="Marin, Oscar" sort="Marin, Oscar" uniqKey="Marin O" first="Oscar" last="Marín">Oscar Marín</name></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:B7CA2BEE3E0AEC5E175A2AFF700140A22DC0F340</idno><date when="2002" year="2002">2002</date><idno type="doi">10.1002/cne.10233</idno><idno type="url">https://api.istex.fr/document/B7CA2BEE3E0AEC5E175A2AFF700140A22DC0F340/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">000F36</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">000F36</idno><idno type="wicri:Area/Istex/Curation">000F34</idno><idno type="wicri:Area/Istex/Checkpoint">000B26</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Checkpoint">000B26</idno><idno type="wicri:doubleKey">0021-9967:2002:Gonzalez A:localization:of:choline</idno><idno type="wicri:Area/Main/Merge">001398</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a" type="main" xml:lang="en">Localization of choline acetyltransferase (ChAT) immunoreactivity in the brain of a caecilian amphibian, Dermophis mexicanus (Amphibia: Gymnophiona)</title><author><name sortKey="Gonzalez, Agustin" sort="Gonzalez, Agustin" uniqKey="Gonzalez A" first="Agustín" last="González">Agustín González</name><affiliation wicri:level="2"><country xml:lang="fr">Espagne</country><wicri:regionArea>Department of Cell Biology, Faculty of Biology, University Complutense, 28040 Madrid</wicri:regionArea><placeName><region nuts="2" type="communauté">Communauté de Madrid</region></placeName></affiliation><affiliation wicri:level="2"><country xml:lang="fr">Espagne</country><wicri:regionArea>Departamento de Biología Celular, Facultad de Biología, Universidad Complutense, 28040 Madrid</wicri:regionArea><placeName><region nuts="2" type="communauté">Communauté de Madrid</region></placeName></affiliation></author><author><name sortKey="L Pez, Jesus M" sort="L Pez, Jesus M" uniqKey="L Pez J" first="Jesús M." last="L Pez">Jesús M. 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However, comparable data are not available for the third order of amphibians, the limbless gymnophionans (caecilians). To further assess general and derived features of the cholinergic system in amphibians, we have investigated the distribution of choline acetyltransferase immunoreactive (ChAT‐ir) cell bodies and fibers in the brain of the gymnophionan Dermophis mexicanus. This distribution showed particular features of gymnophionans such as the existence of a particularly large cholinergic population in the striatum, the presence of ChAT‐ir cells in the mesencephalic tectum, and the organization of the cranial nerve motor nuclei. These peculiarities probably reflect major adaptations of gymnophionans to a fossorial habit. Comparison of our results with those in other vertebrates, including a segmental approach to correlate cell populations across species, shows that the general pattern of organization of cholinergic systems in vertebrates can be modified in certain species in response to adaptative processes that lead to morphological and behavioral modifications of members of a given class of vertebrates, as shown for gymnophionans. J. Comp. Neurol. 448:249–267, 2002. © 2002 Wiley‐Liss, Inc.</div></front></TEI></record>Pour manipuler ce document sous Unix (Dilib)
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