Project description:We conducted a high-throughput sequencing study to measure whole brain miRNA expression levels in alcohol naïve animals in the LXS panel of recombinant inbred (RI) mouse strains. We then combined the sequencing data with genotype data, microarray gene expression data, and data on alcohol-related behavioral phenotypes such as 'Drinking in the dark', 'Sleep time', and 'Low dose activation' from the same RI panel.
Project description:Our objective was to determine whether gene expression in Drosophila melanogaster selectively bred for long or short night sleep duration changes detectably across generations. To meet this objective, we performed transcriptional profiling of ten pooled whole adult individuals from four selected populations and two control populations across 13 generations. We quantified differential expression among selection scheme (long sleep, short sleep, or unselected control), generation (generation 0; then generations 2-13), and sex for each gene.
2023-07-29 | GSE202600 | GEO
Project description:Natural selection on sleep duration in Drosophila melanogaster
Project description:This SuperSeries is composed of the following subset Series:; GSE9441: The effect of sleep deprivation on gene expression in the brain and the liver of three inbred mouse strains; GSE9442: Molecular correlates of sleep deprivation in the brain of three inbred mouse strains in an around-the-clock experiment; GSE9443: Gene expression in brain Homer1a-expressing cells after sleep deprivation Experiment Overall Design: Refer to individual Series
Project description:<p>Chronic sleep loss profoundly impacts metabolic health and shortens lifespan, but studies of the mechanisms involved have focused largely on acute sleep deprivation. To identify metabolic consequences of chronically reduced sleep, we conducted unbiased metabolomics on heads of three adult Drosophila short-sleeping mutants with very different mechanisms of sleep loss: fumin (fmn), redeye (rye), and sleepless (sss). Common features included elevated ornithine and polyamines, with lipid, acyl-carnitine, and TCA cycle changes suggesting mitochondrial dysfunction. Studies of excretion demonstrate inefficient nitrogen elimination in adult sleep mutants, likely contributing to their polyamine accumulation. Increasing levels of polyamines, particularly putrescine, promote sleep in control flies but poison sleep mutants. This parallels the broadly enhanced toxicity of high dietary nitrogen load from protein in chronically sleep-restricted Drosophila, including both sleep mutants and flies with hyper-activated wake-promoting neurons. Together, our results implicate nitrogen stress as a novel mechanism linking chronic sleep loss to adverse health outcomes-and perhaps for linking food and sleep homeostasis at the cellular level in healthy organisms.</p>
Project description:RNA-seq on Drosophila melanogaster ovary (stages 1-7) in: diapause at 12ºC (after 28 days), reproductive at 12ºC (after 28 days), and age-matched control at 25ºC in two inbred genotypes. Each biological replicate is a pool of 25 ovary pairs, and each treatment has three biological replicates.
Project description:These studies adress differential changes in gene expression between 6h sleep deprived and control mice in the brain and the liver. We profiled gene expression in three different inbred strains to understand the influence of genetic background. Keywords: brain, genetic background, sleep deprivation
Project description:We used RNA-seq to investigate natural variation in gene expression in the Malpighian tubules of three inbred Drosophila melanogaster strains and their F1 hybrids. One of the strains was from a population in the species’ ancestral range (Zambia), while the other two were from a more recently derived population (Sweden).
