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The hormonal and neural control of egg production in the historically important model insect, Rhodnius prolixus: A review, with new insights in this post-genomic era.
Gen Comp Endocrinol
June 2022
University of Toronto Mississauga, Department of Biology, Mississauga, ON L5L 1C6, Canada. Electronic address:
Rhodnius prolixus, the blood gorging kissing bug, is a model insect, extensively used by Sir Vincent Wigglesworth and others, upon which the foundations of insect physiology, endocrinology, and development are built. It is also medically important, being a principal vector of Trypanosoma cruzi, the causative agent of Chagas disease in humans. The blood meal stimulates and enables egg production, and since an adult mated female can take several blood meals, each female can produce hundreds of offspring.
View Article and Find Full Text PDFComparative analysis of zygotic developmental genes in Rhodnius prolixus genome shows conserved features on the tracheal developmental pathway.
Insect Biochem Mol Biol
September 2015
Centro de Bioinvestigaciones and Departamento de Ciencias Básicas y Experimentales, Universidad Nacional del Noroeste de la Provincia de Buenos Aires, Monteagudo 2772, 2700, Pergamino, Buenos Aires, Argentina; Laboratorio de Genética y Genómica Funcional, Centro Regional de Estudios Genómicos, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Bvd 120 y 62, La Plata, Buenos Aires, Argentina. Electronic address:
Most of the in-depth studies on insect developmental genetic have been carried out in the fruit fly Drosophila melanogaster, an holometabolous insect, so much more still remains to be studied in hemimetabolous insects. Having Rhodnius prolixus sequenced genome available, we search for orthologue genes of zygotic signaling pathways, segmentation, and tracheogenesis in the R. prolixus genome and in three species of Triatoma genus transcriptomes, concluding that there is a high level of gene conservation.
View Article and Find Full Text PDFFrom the Journal archives: Improving patient outcomes in the era of big data. 1992.
Can J Anaesth
October 2014
Department of Anesthesia, University of British Columbia, Vancouver, BC, V6H 3N1, Canada,
Screening β-arrestin recruitment for the identification of natural ligands for orphan G-protein-coupled receptors.
J Biomol Screen
June 2013
Medical Research Council Technology, Centre for Therapeutic Discovery, London, UK.
A variety of G-protein-coupled receptor (GPCR) screening technologies have successfully partnered a number of GPCRs with their cognate ligands. GPCR-mediated β-arrestin recruitment is now recognized as a distinct intracellular signaling pathway, and ligand-receptor interactions may show a bias toward β-arrestin over classical GPCR signaling pathways. We hypothesized that the failure to identify native ligands for the remaining orphan GPCRs may be a consequence of biased β-arrestin signaling.
View Article and Find Full Text PDFCavitation in the embryonic tracheal system of Manduca sexta.
J Exp Biol
October 2009
University of Montana, Division of Biological Sciences, 32 Campus Drive, Missoula, MT 59812, USA.
Insect tracheae form during embryonic development and initially contain liquid, which impedes transport of oxygen and carbon dioxide. Only later do tracheae fill with gas and come to support high rates of gas flux. This liquid-to-gas transition is poorly understood.
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