Development of pigment-dispersing hormone-like immunoreactivity in the brain of the locustSchistocerca gregaria: comparison with immunostaining for urotensin I and Mas-allatotropin

UweHomberg; NilimaPrakash

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Development of pigment-dispersing hormone-like immunoreactivity in the brain of the locustSchistocerca gregaria: comparison with immunostaining for urotensin I and Mas-allatotropin

机译：Development of pigment-dispersing hormone-like immunoreactivity in the brain of the locustSchistocerca gregaria: comparison with immunostaining for urotensin I and Mas-allatotropin

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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.

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《cell and tissue research》 |1996年第1期|127-139|共页
作者
UweHomberg; NilimaPrakash;
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Institut für Zoologie, Universität Regensburg, D-93040 Regensburg, Germany;

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Development of pigment-dispersing hormone-like immunoreactivity in the brain of the locustSchistocerca gregaria: comparison with immunostaining for urotensin I and Mas-allatotropin

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