Homberg, U and Prakash, N (1996) Development of pigment-dispersing hormone-like immunoreactivity in the brain of the locust Schistocerca gregaria: Comparison with immunostaining for urotensin I and Mas-allatotropin. CELL AND TISSUE RESEARCH, 285 (1). pp. 127-139. ISSN 0302-766X,
Full text not available from this repository.Abstract
The development of peptide phenotypes in the lamina and accessory medulla of the locust brain (Schistocerca gregaria) was studied using antisera against pigment-dispersing hormone (PDH), urotensin I, and Mas-allatotropin. PDH-like immunoreactivity was first detected as 45% of embryonic development in somata at the base of the optic lobe. In the 55% embryo, processes from these neurons (PDFMe cells) extended into the developing accessory medulla and into the lamina and, by 85% of embryogenesis, innervated all major targets in the brain. At 65% of embryogenesis, two additional cell groups near the lamina (PDFLa cells) were immunostained; they appeared to connect the lamina to the medulla. Local neurons of the lamina and accessory medulla had somata adjacent to the PDFLa and PDFMe cells and exhibited urotensin-I-like immunostaining and Mas-allatotropin-like immunostaining, respectively. Immunostaining in these neurons occurred first in their arborizations in the lamina (anti-urotensin I, 50% of embryogenesis) and accessory medulla (anti-Mas-allatotropin, 65% of embryogenesis), whereas their cell bodies became immunostained at 70% and 100% of embryogenesis, respectively. The results suggest a developmental role for PDH-related peptides during pathfinding of the PDFMe projection neurons; such a function can be excluded for peptides related to urotensin I and Mas-allatotropin in local neurons of the lamina and accessory medulla. The developmental migration of PDFMe- and Mas-allatotropin-immunostained cells from the central brain into the optic lobe suggests a central-brain origin of the accessory medulla.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | LOM-AG-MYOTROPIN; NERVOUS-SYSTEM; VISUAL-SYSTEM; EMBRYONIC-DEVELOPMENT; GRASSHOPPER EMBRYO; OPTIC LOBE; DROSOPHILA; NEURONS; EXPRESSION; MIGRATORIA; pigment-dispersing hormone; medulla, insect brain; brain (CNS), invertebrate; optic lobe; development, ontogenetic; immunohistochemistry; Schistocerca gregaria (Insecta) |
| Depositing User: | Dr. Gernot Deinzer |
| Last Modified: | 19 Oct 2022 08:35 |
| URI: | https://pred.uni-regensburg.de/id/eprint/51608 |
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