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Título: | Allatostatin gene expression in brain and midgut, and activity of synthetic allatostatins on feeding-related processes in the cockroach Blattella germanica |
Autor: | Aguilar, Ruth; Maestro, José L. CSIC ORCID ; Vilaplana, Lluïsa; Pascual Duran, Nuria CSIC; Piulachs, Maria-Dolors CSIC ORCID ; Bellés, Xavier CSIC ORCID | Palabras clave: | Food intake control Blattella germanica German cockroach Gene expression Juvenile hormone Allatostatin |
Fecha de publicación: | 15-oct-2003 | Editor: | Elsevier | Citación: | Regulatory Peptides 115(3): 171-177 (2003) | Resumen: | Allatostatins of the YXFGLamide group were discovered in cockroaches through their capacity to inhibit juvenile hormone biosynthesis. Here, we assess the occurrence of preproallatostatin (preproAST) mRNA in the brain and midgut of adult females of the cockroach Blattella germanica, and estimate brain and midgut preproAST mRNA levels during the first reproductive cycle. Reverse transcription polymerase chain reaction (RT-PCR) shows that brain preproAST mRNA levels increase slightly during the gonadotrophic cycle, and remain high during ootheca transport. In the midgut, preproAST mRNA levels decline around the middle of the gonadotrophic cycle. The pattern of allatostatin expression in gut tissues suggests that these peptides play roles related to feeding and nutrition. Our results have shown that synthetic allatostatins inhibit hindgut motility and activate midgut α-amylase secretion. In addition, injected allatostatins inhibit food consumption, which might be connected to the above activities. © 2003 Elsevier B.V. All rights reserved. | Versión del editor: | http://doi.org/10.1016/S0167-0115(03)00165-4 | URI: | http://hdl.handle.net/10261/147945 | DOI: | 10.1016/S0167-0115(03)00165-4 | Identificadores: | issn: 0167-0115 |
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