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Tissue Cell

Title:		Morphological and ultrastructural analysis of an important place of sexual communication of Rhodnius prolixus (Heteroptera: Reduviidae): the Metasternal Glands
Author(s):		Lopes RL; Santos-Mallet JR; Barbosa CF; Gomes SAO; Spiegel CN;
Address:		"Postgraduate Program of Science and Biotechnology, Instituto de Biologia, Universidade Federal Fluminense, Niteroi, RJ, Brazil; Laboratory of Insects and Pathogen Biodiversity, Departamento de Biologia Geral, Instituto de Biologia, Universidade Federal Fluminense, Niteroi, RJ, Brazil. Electronic address: rosanelopes@id.uff.br. Interdisciplinary Laboratory of Entomological Surveillance in Diptera and Hemiptera, Instituto Oswaldo Cruz (IOC), Fundacao Oswaldo Cruz (FIOCRUZ), Rio de Janeiro-RJ- Brazil, Universidade Iguacu (UNIG), Nova Iguacu, RJ, Brazil. Electronic address: jacenir@ioc.fiocruz.br. Departamento de Geoquimica, Instituto de Quimica, Universidade Federal Fluminense, Niteroi, RJ, Brazil. Electronic address: catiafb@id.uff.br. Postgraduate Program of Science and Biotechnology, Instituto de Biologia, Universidade Federal Fluminense, Niteroi, RJ, Brazil; Laboratory of Insects and Pathogen Biodiversity, Departamento de Biologia Geral, Instituto de Biologia, Universidade Federal Fluminense, Niteroi, RJ, Brazil. Electronic address: suzetearaujo@id.uff.br. Postgraduate Program of Science and Biotechnology, Instituto de Biologia, Universidade Federal Fluminense, Niteroi, RJ, Brazil; Departamento de Biologia Celular e Molecular, Instituto de Biologia, Universidade Federal Fluminense, Niteroi, RJ, Brazil. Electronic address: carolinaspiegel@id.uff.br"
Journal Title:		Tissue Cell
Year:		2020
Volume:		20200914
Issue:
Page Number:		101416 -
DOI:		10.1016/j.tice.2020.101416
ISSN/ISBN:		1532-3072 (Electronic) 0040-8166 (Linking)
Abstract:		"Rhodnius prolixus is an important vector of Trypanosoma cruzi, the etiological agent of Chagas disease. Insect adults have a pair of Metasternal Glands (MGs) and the secretion emitted by these glands acts as sex pheromone. Recent studies have focused on the chemical composition of this pheromone, electrophysiological responses to MGs compounds and mating behavior assays. Morphological studies of these glands are still scarce. Thus, considering the relevance of MGs in the sex pheromone biosynthesis, we investigated the morphology and ultrastructure of R. prolixus MGs. The glandular apparatus presents a tubular structure containing secretory cells with canalicules that fuse with the central duct which conducts the secretion to a pear-shaped reservoir connected to the exterior by a droplet-shape orifice. The secretory cells are classified as class III, they present a well-developed rough and smooth endoplasmic reticulum. Smooth endoplasmic reticulum is a site of lipid biosynthesis that may be involved in the mevalonate pathway, a probable route of the sex pheromone biosynthesis in this insect. The presence of rough endoplasmic reticulum indicates a possible peptides/proteins secretions site which were still not characterized in MGs. Several mitochondria are scattered in the cytoplasm that may suggest a high metabolic activity. Further studies should be carried out to correlate these data with the sex pheromone biosynthesis in this vector"
Keywords:		"Animal Structures/*anatomy & histology/cytology/*ultrastructure Animals Female Rhodnius/*anatomy & histology/cytology/*ultrastructure Sexual Behavior, Animal/*physiology Electron microscopy Light microscopy Metasternal Glands Rhodnius prolixus Sex pheromo;"
Notes:		"MedlineLopes, Rosane L Santos-Mallet, Jacenir R Barbosa, Catia F Gomes, Suzete A O Spiegel, Carolina N eng Scotland 2020/09/27 Tissue Cell. 2020 Dec; 67:101416. doi: 10.1016/j.tice.2020.101416. Epub 2020 Sep 14"