Inactive prothoracic glands in larvae and pupae of Aedes aegypti: Ecdysteroid release by tissues in the thorax and abdomen
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Cited by (33)
Rethinking the ecdysteroid source during Drosophila pupal–adult development
2023, Insect Biochemistry and Molecular BiologyCitation Excerpt :There is precedent for a non-PG primary source of ecdysteroids during embryogenesis in D. melanogaster (the epidermis; see above) and during metamorphosis in other insects, with the oenocytes and epidermis implicated in various species (reviewed in Delbecque et al., 1990). An alternative primary source during D. melanogaster metamorphosis has never—to our knowledge—been formally tested with either biochemical analyses of the presence of Halloween enzymes in non-PG tissues during the PAP, nor with ex vivo ecdysteroid secretion experiments like those performed in other insect species (Delbecque et al., 1990; Jenkins et al., 1992; Telang et al., 2007). Despite this absence of supportive biochemical data, there is a small amount of (non-shd) Halloween gene expression in non-PG larval tissues (Leader et al., 2018) and whole-body expression of most of these genes is roughly sustained past pupation (Graveley et al., 2011).
Evaluation of ecdysteroid antisera for a competitive enzyme immunoassay and extraction procedures for the measurement of mosquito ecdysteroids
2017, General and Comparative EndocrinologyCitation Excerpt :We then conducted studies in the yellow fever mosquito, Aedes aegypti, to assess the utility of these antisera in EIAs for quantifying E and 20E in larvae and adult females after consuming a blood meal. Previous studies using high performance liquid chromatography (HPLC) and RIA showed that A. aegypti primarily if not exclusively produce E and 20E (Hagedorn et al., 1975; Greenplate et al., 1985; Borovsky et al., 1986; Jenkins et al., 1992; Sieglaff et al., 2005; Telang et al., 2007). Inconsistencies in the E and 20E titers generated by our EIAs with prior results generated by RIA prompted the development of a new extraction protocol for use with whole mosquitoes, particular tissues, and ex vivo assays.
Calcium influx enhances neuropeptide activation of ecdysteroid hormone production by mosquito ovaries
2016, Insect Biochemistry and Molecular BiologyCitation Excerpt :Phylogenetic studies, however, indicate that Torso is structurally distinct from the IR and OEHR (Vogel et al., 2013), while functional assays indicate that Torso signals through the mitogen-activated protein kinase (MAPK) pathway (Rewitz et al., 2009). The mosquito literature suggests ECD stimulates molting and metamorphosis, but notably identifies the body wall of larvae rather than PTGs as the source of ECD (Jenkins et al., 1992; Telang et al., 2007). While mosquitoes encode orthologs for ptth and torso (Predel et al., 2010; Akbari et al., 2013), their functional roles in ECD biosynthesis are unknown.
Mosquito Peptide Hormones: Diversity, Production, and Function
2016, Advances in Insect PhysiologyCitation Excerpt :Given the literature on many other insects, it is somewhat ironic that surprisingly little is known about the regulation of moulting in mosquitoes. An early study showed that larval thoracic and abdominal wall tissues produce ecdysone yet also reported that PGs do not (Jenkins et al., 1992). These findings together with the Drosophila literature indicate our understanding of peptide hormone functions in moulting are far from complete for Diptera.
Ecdysteroid Chemistry and Biochemistry
2012, Insect Endocrinology