The mode of expression divergence in Drosophila fat body is infection-specific
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ABSTRACT:
PROVIDER: PRJNA648308 | ENA |
REPOSITORIES: ENA
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Project description:Transcription is controlled by the interactions of cis-acting DNA elements with diffusible trans-acting factors. Changes in cis or trans factors can drive expression divergence within and between species, and the relative prevalence of each can reveal the evolutionary path to variation. Previous work delineating the mode of expression divergence in animals has largely used whole body expression measurements in a single condition. Since cis-acting elements often drive expression in a subset of cell types or conditions, these measurements may not capture the complete contribution of cis-acting changes. Here, we quantify the mode of expression divergence in the Drosophila fat body, the primary immune organ, in several conditions. We performed allele-specific expression analysis using two geographically distinct lines of D. melanogaster and their F1 hybrids. We performed separate infections with Gram-negative S. marcescens or Gram-positive E. faecalis bacteria, which trigger the two primary signaling pathways in the Drosophila innate immune response. The mode of expression divergence strongly depends on the condition, with trans-acting effects dominating in response to Gram-positive infection and cis-acting effects dominating in Gram-negative and pre-infection conditions. Expression divergence in several receptor proteins may underlie the infection-specific trans effects. Before infection, when the fat body has a metabolic role, there are many compensatory effects, changes in cis and trans that counteract each other to maintain expression levels. This work demonstrates that within a single tissue, the mode of expression divergence varies between conditions and suggests that these differences reflect the diverse evolutionary histories of host-pathogen interactions.
2021-03-23 | GSE155033 | GEO
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Project description:We report the transcriptome profile of one sequenced sample of mRNA isolated from pooled (20 from each genotype) abdomen fly extracts enriched in fat body content of fat body-specific Sdc RNAi knockdown and control flies Abdominal fat body mRNA profiles of 4-6-day old control and fat body-specific Sdc RNAi knockdown were generated by deep sequencing using Illumina HiSeq 2500
2016-06-30 | E-GEOD-67001 | biostudies-arrayexpress
Project description:We report the transcriptome profile of one sequenced sample of mRNA isolated from pooled (20 from each genotype) abdomen fly extracts enriched in fat body content of fat body-specific Sdc RNAi knockdown and control flies
2016-06-30 | GSE67001 | GEO
Project description:Proteome analysis of Polyrhachis lamellidens fat body
2022-06-16 | PXD032873 | JPOST Repository
Project description:Fat body is an important tissue in the context of vitellogenesis, vector immunity, vector physiology and vector-parasite interaction. However, the proteome of this vital organ has not been investigated in any Anopheline species so far. In this study, we employed multiple fractionation method followed by high resolution mass spectrometry to characterize fat body proteome of female mosquitoes An. stephensi Indian strain. In all, we identified 4, 535 proteins in the fat body and a subset of these proteins were found to be restricted to fat body. Gene ontology analysis of these proteins suggested their role in metabolism, lipid transport, vitellogenesis, mosquito immunity and oxidation-reduction processes. By far, this is the largest proteomic resource of fat body in any mosquito species.
2019-01-07 | PXD006677 | Pride
Project description:We performed mRNA-seq from hand-dissected fat body tissue from 68hr (after egg laying, AEL) and 92hr AEL Drosophila melanogaster larvae. Fat body was dissected from wild-type (OrR) males and testes were removed. We examined gene expression genome-wide with particular focus on genes in the underreplicated regions in the fat body.
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Project description:High-fat diet (HFD)-induced obesity is a multi-factorial disease including genetic, physiological, behavioral, and environmental components. Drosophila has emerged as an effective metabolic disease model. Cytidine 5'-triphosphate synthase (CTPS) is a crucial enzyme for the de novo synthesis of CTP, governing the cellular level of CTP and phospholipid synthesis. CTPS has been found to form filaments known as cytoophidia, which are evolutionarily conserved in bacteria, archaea, and eukaryotes. Here, we show that CTPS functions in fat bodies to regulate body weight and starvation resistance in Drosophila. HFD-induced obesity enhances CTPS transcription and lengthens cytoophidia in larval adipocytes. CTPS depletion in the fat body prevented HFD-induced obesity, including body weight gain, adipocyte expansion, and lipid accumulation, by inhibiting the PI3K-Akt-SREBP axis. A dominant-negative form of CTPS also inhibits adipocyte expansion and down-regulates lipogenic genes. As a result, our findings not only establish a functional link between CTPS and lipid homeostasis but also highlight a potential role of CTPS manipulation in the treatment of HFD-induced obesity.
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Project description:In honey bees, Vitellogenin (Vg) is hypothesized to be a major factor affecting hormone signaling, food-related behavior, immunity, stress resistance and lifespan. Likewise microRNAs play important roles in posttranscriptional gene regulation and affect many biological processes thereby showing many parallels to Vg functions. The molecular basis of Vg and microRNA interactions is largely unknown. Here, we exploited the well-established RNA interference (RNAi) protocol for Vg knockdown to investigate its effects on microRNA population in honey bee foragerM-bM-^@M-^Ys brain and fat body tissue. To identify microRNAs that are differentially expressed between tissues in control and knockdown foragers, we used M-BM-5ParafloM-BM-. microfluidic oligonucleotide microRNA microarrays. Our results show 76 and 74 miRNAs were expressed in the brain of control and knockdown foragers whereas 66 and 69 miRNAs were expressed in the fat body of control and knockdown foragers respectively. Target prediction identified potential seed matches for differentially expressed subset of microRNAs affected by Vg knockdown. These candidate genes are involved in a broad range of biological processes including insulin signaling, juvenile hormone (JH) and ecdysteroid signaling previously shown to affect foraging behavior. Thus, here we demonstrate a causal link between Vg expression-variation and variation in the abundance of microRNAs in different tissues with possible consequences for regulation of foraging behavior. We knocked down Vitellogenin (Vg) gene expression (using RNAi) in adult workers to identify potential downstream consequences on the expression of microRNA population in the fat body compared to control group (dsRNA-GFP injected bees). Six biological samples of fat body-derived small RNA fraction were prepared for each treatment group (dsRNA-Vg and dsRNA-GFP). Each biological sample contained pooled RNA from 5 unique individuals. Each fat body pool contained a total of 2 M-BM-5g of small RNA fraction, to which each of the 5 individuals contributed equally (400 ng). Pools were named as M-bM-^@M-^\control forager fat bodyM-bM-^@M-^] (GFFb) and M-bM-^@M-^\knockdown forager fat bodyM-bM-^@M-^] (VFFb), followed by a number from 1 to 6.
2013-03-07 | E-GEOD-44916 | biostudies-arrayexpress