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- W2894563804 abstract "Ftz-f1 is an orphan member of the nuclear hormone receptor superfamily. A 20-hydroxyecdysone pulse allows ftz-f1 gene expression, which then regulates the activity of downstream genes involved in major developmental progression events. In honeybees, the expression of genes like vitellogenin (vg), prophenoloxidase and juvenile hormone-esterase during late pharate-adult development is known to be hormonally controlled in both queens and workers by increasing juvenile hormone (JH) titres in the presence of declining levels of ecdysteroids. Since Ftz-f1 is known for mediating intracellular JH signalling, we hypothesized that ftz-f1 could mediate JH action during the pharate-adult development of honeybees, thus controlling the expression of these genes. Here, we show that ftz-f1 has caste-specific transcription profiles during this developmental period, with a peak coinciding with the increase in JH titre, and that its expression is upregulated by JH and downregulated by ecdysteroids. RNAi-mediated knock down of ftz-f1 showed that the expression of genes essential for adult development (e.g. vg and cuticular genes) depends on ftz-f1 expression. Finally, a double-repressor hypothesis-inspired vg gene knock-down experiment suggests the existence of a positive molecular loop between JH, ftz-f1 and vg." @default.
- W2894563804 created "2018-10-12" @default.
- W2894563804 creator A5011624590 @default.
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- W2894563804 date "2018-10-30" @default.
- W2894563804 modified "2023-10-15" @default.
- W2894563804 title "Hormonal control and target genes of <i>ftz-f1 </i> expression in the honeybee <i>Apis mellifera</i> : a positive loop linking juvenile hormone, <i>ftz-f1</i> , and <i>vitellogenin</i>" @default.
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- W2894563804 doi "https://doi.org/10.1111/imb.12541" @default.
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