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- W2296222259 abstract "Abstract Since the discovery of microRNAs (miRNAs) only two decades ago, they have emerged as an essential component of the gene regulatory machinery. miRNAs have seemingly paradoxical features: a single miRNA is able to simultaneously target hundreds of genes, while its presence is mostly dispensable for animal viability under normal conditions. It is known that miRNAs act as stress response factors; however, it remains challenging to determine their relevant targets and the conditions under which they function. To address this challenge, we propose a new workflow for miRNA function analysis, by which we found that the evolutionarily young miRNA family, the mir-310s (mir-310/mir-311/mir-312/mir-313), are important regulators of Drosophila metabolic status. mir-310s-deficient animals have an abnormal diet-dependent expression profile for numerous diet-sensitive components, accumulate fats, and show various physiological defects. We found that the mir-310s simultaneously repress the production of several regulatory factors (Rab23, DHR96, and Ttk) of the evolutionarily conserved Hedgehog (Hh) pathway to sharpen dietary response. As the mir-310s expression is highly dynamic and nutrition sensitive, this signal relay model helps to explain the molecular mechanism governing quick and robust Hh signaling responses to nutritional changes. Additionally, we discovered a new component of the Hh signaling pathway in Drosophila, Rab23, which cell autonomously regulates Hh ligand trafficking in the germline stem cell niche. How organisms adjust to dietary fluctuations to sustain healthy homeostasis is an intriguing research topic. These data are the first to report that miRNAs can act as executives that transduce nutritional signals to an essential signaling pathway. This suggests miRNAs as plausible therapeutic agents that can be used in combination with low calorie and cholesterol diets to manage quick and precise tissue-specific responses to nutritional changes." @default.
- W2296222259 created "2016-06-24" @default.
- W2296222259 creator A5009859857 @default.
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- W2296222259 creator A5089006758 @default.
- W2296222259 date "2016-01-22" @default.
- W2296222259 modified "2023-10-16" @default.
- W2296222259 title "Hedgehog Signaling Strength Is Orchestrated by the <i>mir-310</i> Cluster of MicroRNAs in Response to Diet" @default.
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- W2296222259 doi "https://doi.org/10.1534/genetics.115.185371" @default.
- W2296222259 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/4788116" @default.
- W2296222259 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/26801178" @default.
- W2296222259 hasPublicationYear "2016" @default.
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