Tissue Damage Disrupts Developmental Progression and Ecdysteroid Biosynthesis in Drosophila

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Date
2012
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PLOS ONE
Abstract
In humans, chronic inflammation, severe injury, infection and disease can result in changes in steroid hormone titers and delayed onset of puberty; however the pathway by which this occurs remains largely unknown. Similarly, in insects injury to specific tissues can result in a global developmental delay (e.g. prolonged larval/pupal stages) often associated with decreased levels of ecdysone – a steroid hormone that regulates developmental transitions in insects. We use $\textit{Drosophila melanogaster}$ as a model to examine the pathway by which tissue injury disrupts developmental progression. Imaginal disc damage inflicted early in larval development triggers developmental delays while the effects are minimized in older larvae. We find that the switch in injury response (e.g. delay/no delay) is coincident with the mid-3rd instar transition – a developmental time-point that is characterized by widespread changes in gene expression and marks the initial steps of metamorphosis. Finally, we show that developmental delays induced by tissue damage are associated with decreased expression of genes involved in ecdysteroid synthesis and signaling.
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Keywords
ecdysteroid, animal tissue, catabolism, controlled study, developmental disorder, Drosophila melanogaster, gene expression, genetic association, insect development, larval development, metamorphosis, nonhuman, real time polymerase chain reaction, signal transduction, steroidogenesis, tissue injury, Animals, DNA Primers, Ecdysteroids, Gene Expression Regulation, Developmental, Imaginal Discs, Larva, Metamorphosis, Biological, Real-Time Polymerase Chain Reaction, signal transduction, Hexapoda
Citation
Hackney, J. F., Zolali-Meybodi, O., & Cherbas, P. (2012). Tissue damage disrupts developmental progression and ecdysteroid biosynthesis in drosophila. PLoS ONE, 7(11). http://dx.doi.org/10.1371/journal.pone.0049105
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© 2012 Hackney et al
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