Tyrosine hydroxylase immunolabeling reveals the distribution of catecholaminergic neurons in the central nervous systems of the spidersHogna lenta(Araneae: Lycosidae) andPhidippus regius(Araneae: Salticidae)
| Autor: | Anthony Auletta, Karen A. Mesce, Cynthia M. Harley, Mara C. P. Rue |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Adrenergic Neurons
Central Nervous System 0301 basic medicine Hogna Tyrosine 3-Monooxygenase genetic structures Wolf spider Jumping spider 03 medical and health sciences Catecholamines 0302 clinical medicine Animals Phidippus regius Catecholaminergic Spider biology Tyrosine hydroxylase Dopaminergic Neurons General Neuroscience Spiders biology.organism_classification Immunohistochemistry 030104 developmental biology nervous system Evolutionary biology Catecholaminergic cell groups 030217 neurology & neurosurgery |
| Zdroj: | Journal of Comparative Neurology. 528:211-230 |
| ISSN: | 1096-9861 0021-9967 |
| DOI: | 10.1002/cne.24748 |
| Popis: | With over 48,000 species currently described, spiders (Arthropoda: Chelicerata: Araneae) comprise one of the most diverse groups of animals on our planet, and exhibit an equally wide array of fascinating behaviors. Studies of central nervous systems (CNSs) in spiders, however, are relatively sparse, and no reports have yet characterized catecholaminergic (dopamine [DA]- or norepinephrine-synthesizing) neurons in any spider species. Because these neuromodulators are especially important for sensory and motor processing across animal taxa, we embarked on a study to identify catecholaminergic neurons in the CNS of the wolf spider Hogna lenta (Lycosidae) and the jumping spider Phidippus regius (Salticidae). These neurons were most effectively labeled with an antiserum raised against tyrosine hydroxylase (TH), the rate-limiting enzyme in catecholamine synthesis. We found extensive catecholamine-rich neuronal fibers in the first- and second-order optic neuropils of the supraesophageal mass (brain), as well as in the arcuate body, a region of the brain thought to receive visual input and which may be involved in higher order sensorimotor integration. This structure likely shares evolutionary origins with the DA-enriched central complex of the Mandibulata. In the subesophageal mass, we detected an extensive filigree of TH-immunoreactive (TH-ir) arborizations in the appendage neuromeres, as well as three prominent plurisegmental fiber tracts. A vast abundance of TH-ir somata were located in the opisthosomal neuromeres, the largest of which appeared to project to the brain and decorate the appendage neuromeres. Our study underscores the important roles that the catecholamines likely play in modulating spider vision, higher order sensorimotor processing, and motor patterning. |
| Databáze: | OpenAIRE |
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