Distribution of serotonin (5HT)-immunoreactive structures in the central nervous system of two chondrostean species (Acipenser baeri and Huso huso).
Identifieur interne : 001689 ( Main/Merge ); précédent : 001688; suivant : 001690Distribution of serotonin (5HT)-immunoreactive structures in the central nervous system of two chondrostean species (Acipenser baeri and Huso huso).
Auteurs : F. Adrio [Espagne] ; R. Anad N ; I. Rodríguez-MoldesSource :
- The Journal of comparative neurology [ 0021-9967 ] ; 1999.
English descriptors
- KwdEn :
- MESH :
- chemical , metabolism : Serotonin.
- metabolism : Brain, Central Nervous System, Fishes, Spinal Cord.
- physiology : Tissue Distribution.
- Animals, Immunohistochemistry.
Abstract
The distribution of serotonin-immunoreactive (5HT-ir) elements was studied in the brain and rostral spinal cord of two chondrosteans, Acipenser baeri and Huso huso, by using an antibody against serotonin. The distribution of these elements was similar in both sturgeon species. In the telencephalon, 5HT-ir cells were found in the olfactory bulb and in the medioventral wall of the telencephalic ventricle, rostral to the anterior commissure, the latter being cerebrospinal fluid-contacting (CSF-C) neurons. The diencephalon contained the highest number of 5HT-ir cell bodies, most of them of CSF-C type, located in the preoptic recess organ, paraventricular organ, posterior recess nucleus, and in the ventromedial thalamus. 5HT-ir non-CSF-C neurons appeared in the dorsal thalamic nucleus. In the brainstem, 5HT-ir neurons were located in four raphe nuclei (dorsal, superior, medial and inferior raphe nuclei) and four lateral reticular nuclei. The dorsal raphe nucleus contained 5HT-ir CSF-C cells, a type of serotoninergic cell that has not been described before in raphe nuclei of fishes or of other vertebrates. CSF-C and non-CSF-C 5HT-ir cells were observed in the spinal cord. 5HT-ir fibers were also widely distributed in the central nervous system of both sturgeon species. Comparison of these results with the distribution of serotoninergic systems in lampreys and other vertebrates suggests that widespread distribution of 5HT-ir cells is a feature of early vertebrate lines.
PubMed: 10320215
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<country xml:lang="fr">Espagne</country>
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<front><div type="abstract" xml:lang="en">The distribution of serotonin-immunoreactive (5HT-ir) elements was studied in the brain and rostral spinal cord of two chondrosteans, Acipenser baeri and Huso huso, by using an antibody against serotonin. The distribution of these elements was similar in both sturgeon species. In the telencephalon, 5HT-ir cells were found in the olfactory bulb and in the medioventral wall of the telencephalic ventricle, rostral to the anterior commissure, the latter being cerebrospinal fluid-contacting (CSF-C) neurons. The diencephalon contained the highest number of 5HT-ir cell bodies, most of them of CSF-C type, located in the preoptic recess organ, paraventricular organ, posterior recess nucleus, and in the ventromedial thalamus. 5HT-ir non-CSF-C neurons appeared in the dorsal thalamic nucleus. In the brainstem, 5HT-ir neurons were located in four raphe nuclei (dorsal, superior, medial and inferior raphe nuclei) and four lateral reticular nuclei. The dorsal raphe nucleus contained 5HT-ir CSF-C cells, a type of serotoninergic cell that has not been described before in raphe nuclei of fishes or of other vertebrates. CSF-C and non-CSF-C 5HT-ir cells were observed in the spinal cord. 5HT-ir fibers were also widely distributed in the central nervous system of both sturgeon species. Comparison of these results with the distribution of serotoninergic systems in lampreys and other vertebrates suggests that widespread distribution of 5HT-ir cells is a feature of early vertebrate lines.</div>
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