Linked Life Data

11093245

Source:http://linkedlifedata.com/resource/pubmed/id/11093245

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pubmed-article:11093245pubmed:abstractTextIn the present study, we have examined catalase protein and mRNA levels and the factors that may regulate catalase expression in Drosophila melanogaster during development. Both mRNA and protein changes are in general accord with variations in ecdysteroid titer during development. Differences in mRNA and protein accumulation profiles, particularly in embryos and young adults, suggest that catalase may be regulated at both transcriptional and post-transcriptional levels. It was possible to induce catalase expression by administering exogenous 20-hydroxyecdysone (Ec) in culture at certain stages of development (usually at time points corresponding to previously observed hormone and catalase peaks). Experiments with exogenous administration of Ec, cycloheximide, and actinomycin D suggest a complex interplay of factors affecting catalase expression. In cultured third instar larvae, superinduction of catalase occurred in the presence of both Ec and cycloheximide. If ecdysteroid production was suppressed prior to antibiotic treatment by temperature upshift of the conditional mutant dre4(e55), superinduction occurred mostly at the protein level. In cultured adult abdomens, we observed induction by Ec and superinduction in the presence of hormone and translation or transcription inhibitors. Unlike what was observed in larvae, superinduction of catalase protein was dramatically more pronounced in control flies.lld:pubmed
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pubmed-article:11093245pubmed:dateRevised2007-11-14lld:pubmed
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pubmed-article:11093245pubmed:articleTitleCatalase expression in Drosophila melanogaster is responsive to ecdysone and exhibits both transcriptional and post-transcriptional regulation.lld:pubmed
pubmed-article:11093245pubmed:affiliationDepartment of Biological Sciences, Southern Methodist University, Dallas, Texas 75725, USA.lld:pubmed
pubmed-article:11093245pubmed:publicationTypeJournal Articlelld:pubmed
pubmed-article:11093245pubmed:publicationTypeResearch Support, U.S. Gov't, P.H.S.lld:pubmed
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