Dysregulation of axogenesis in the antennal nervous system of the embryonic grasshopper Schistocerca gregaria
| Autor: | Erica Ehrhardt, George Boyan |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Nervous system Arthropod Antennae Cell type Embryo Nonmammalian Neurogenesis Grasshoppers 03 medical and health sciences Cellular and Molecular Neuroscience 0302 clinical medicine Developmental Neuroscience medicine Animals Axon Grasshopper Growth cone biology Brain biology.organism_classification Embryonic stem cell Phenotype humanities Axons 030104 developmental biology medicine.anatomical_structure Schistocerca Neuroscience 030217 neurology & neurosurgery |
| Zdroj: | Invertebrate neuroscience : IN. 19(1) |
| ISSN: | 1439-1104 |
| Popis: | The antennal nervous system of the grasshopper Schistocerca gregaria features two parallel axon tracts each established early in embryogenesis by discrete pairs of pioneer neurons located at the antennal tip and whose growth cones contact so-called base pioneers en route to the brain. Here we present two antennal phenotypes in which a stereotypic dysregulation of axogenesis in a given tract is observed when only the base pioneer associated with that pathway is missing, consistent with a role for this cell type in guided axogenesis. Dysregulation involves defasciculation and aberrant navigation by pioneer axons resulting in a missing or depleted primordial antennal nerve to the brain. The dysregulated phenotypes reveal that axogenesis in each pathway is regulated independently. Previously unseen discrepancies in the navigational decisions made by pioneer neurons which derive sequentially from the same mother cell demonstrate that these progeny have separate identities. Possible mechanisms for the dysregulated phenotypes are considered. |
| Databáze: | OpenAIRE |
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