Drosophilagutregions
Ontology highlight
ABSTRACT:
ORGANISM(S): Drosophila melanogaster
SUBMITTER: Nicolas Buchon
PROVIDER: E-MTAB-1620 | biostudies-arrayexpress |
REPOSITORIES: biostudies-arrayexpress
Similar Datasets
Project description:To understand the effects of the microbiome of Drosophila melanogaster on host gene expression, we compared the transcriptome of guts from conventionally reared flies to their axenically (germ-free)-reared counterparts. Our analysis used dissected intestines from 4-7 day-old adult females and included two wild-type fly lines, OregonR and CantonS, as well as an immune-deficient line, RelishE20. With one of the wild-type lines, CantonS, we also looked at the impact of microbiome on the transcriptional profile of dissected intestines from aged cohorts (35-40 day-old females) and young (4-7 day-old) non-gut tissues (all tissues remaining from samples dissected for the analysis of guts.
2014-05-01 | E-MTAB-2447 | biostudies-arrayexpress
Project description:Innate immune responses rely on expression of potent effector molecules, such as antimicrobial peptides, which have the capability to kill invading microorganisms. The presence and recognition of microbial components triggers several signaling pathways, such as the Toll and IMD pathways, which in turn activate NF-kB/Rel transcription factors to induce transcription of a large number of immune system genes. Not much is known how these genes are kept silent in healthy flies in the presence of commensal microorganisms, and how the expression of immune defense genes is turned off. We found that several immune defense genes are constitutively active in nub[1] mutants, indicating that the POU domain transcription factor Pdm1/Nubbin may act as a repressor of immune gene expression. We used microarrays to analyze the global changes in gene expression in nub[1] mutants compared to wild type. To analyze changes in gene expression in the gut distinctly from other immune-responsive tissues, such as fat body and hemocytes, flies were dissected and the gut was analyzed separately from the rest of the fly (carcass). A large number of genes were differentially expressed in nub[1] mutants compared to wild type. The differentially expressed transcripts are dominated by genes involved in Immune system processes and in Metabolism/Catabolism processes. The gut samples were dominated by genes involved in biological processes linked to Metabolism/Catabolism, but also here, genes involved in Response processes were enriched among the differentially expressed genes. The following Drosophila melanogaster strains were used: OregonR was used as wild type control and nub[1] b[1] pr[1] was used as the nub[1] mutant. Flies were dissected so that gut tissue was analyzed separately (gut) from the rest of the fly, minus head and gut (carcass). In total, 12 samples consisting of four different sample types: wt gut, wt carcass, nub[1] gut and nub[1] carcass, and three samples of each type.
2013-09-06 | E-GEOD-44234 | biostudies-arrayexpress
Project description:The transcriptional response of H. armigera larvae was analyzed after feeding on gossypol supplemented diet, a toxic secondary metabolite produced in cotton plants, to detect potential detoxification enzymes possibly involved in detoxification of gossypol by H. armigera. A one-color microarray-based gene expression analysis was performed with Cy3 labeled cRNA of gut and rest of the body of H. armigera larvae that fed on 0.016%, 0.16% gossypol and control diet. For each treatment and tissue four biological replicates were used.
2016-02-06 | E-GEOD-77619 | biostudies-arrayexpress
Project description:The transcriptional response of H. virescens larvae was analyzed after feeding on gossypol supplemented diet, a toxic secondary metabolite produced in cotton plants, to detect potential detoxification enzymes possibly involved in detoxification of gossypol by H. virescens. A one-color microarray-based gene expression analysis was performed with Cy3 labeled cRNA of gut and rest of the body of H. virescens larvae that fed on 0.32% gossypol and control diet. For each treatment and tissue four biological replicates were used.
2016-02-06 | E-GEOD-77620 | biostudies-arrayexpress
Project description:Summary: Multi-toxins Bt-crops carrying insecticidal toxins with similar host spectrum and different mode of action e.g. Cry and Vip, are expected to improve resistance management in target pests. Control failure has been informed for Cry toxins but not for Vip3A, of which no mechanism of resistance has yet been identified. Here we applied HT-SuperSAGE to analyze the transcriptome profiling in the midgut tissue of a tobacco budworm Heliothis virescens (F.) strain laboratory-selected for Vip3A resistance. A total of 1324252 26-bp tags were sequenced representing 17751 unique transcripts (UniTags) from genetically similar Vip3A-resistant (Vip-Sel) strain and susceptible control (Vip-Unsel) strain. Differential expression was found significant (≥ 2.5-fold or ≤ 0.4) for 1845 unigenes that constitute 10.4% of the total number of UniTags, where 277 represented overexpressed (OE) and 1568 underexpressed (UE) genes in Vip-Sel compared to Vip-Unsel. BLASTN searches mapped 1141 of these UniTags to H. virescens EST sequences, of which, 816 (143 OE and 673 UE) were unambiguously annotated to proteins in NCBI non-redundant protein databases. Gene ontology revealed Vip3A adaptation induced major constitutive transcriptional differences in serine-proteases (SP)-mediated proteolysis, ribosome biogenesis and metabolic processes. Several unigenes homologous to a particular member of the REsponse to PAThogen (REPAT) family were found to be predominantly OE. Since UniTags related to SP and ribosomal proteins (RP) were the most represented in the libraries, they were further analyzed in details. Interestingly, UniTags related to the putative Vip3A-binding protein RpS2 were underexpressed, while, the tumorigenesis suppressor RpL37 accounted for the 35% of total overexpressed RP. A subset of unigenes was chosen to confirm the HT-SuperSAGE data by qRT-PCR. The present study is the first providing a lepidopteran gut transcriptome associated with Vip3A resistance and a foundation for future attempts to elucidate the resistance mechanism. Methods: Midgut transcriptional profiles of third-instar larvae from genetically similar Vip3A-resistant (Vip-Sel) and susceptible control (Vip-Unsel) strains were generated by HT-SuperSAGE. RNA pools of Vip-Sel and Vip-Unsel samples (five RNA preparations each) were prepared and used for the construction of SuperSAGE libraries HvR_GCCT and HvS_GCAC, respectively, according to the procedure described by [Matsumura et al., 2010]. Purified PCR products were mixed and applied to Illumina Genome Analyzer II sequencing with GEX (DpnII) primer in the sequencing reactions as recommended by the manufacturer. Sorting of sequence reads based on index sequences and the subsequent extraction of sequence tags from reads was conducted using a script written in Perl. Fold-change for each tag was calculated as in [Gilardoni et al., 2010]. qRT–PCR validation was performed using TaqMan and SYBR Green assays.
2015-08-21 | E-GEOD-72228 | biostudies-arrayexpress
Project description:We found that the midgut shows striking regional differentiation along its anterior-posterior axis. Ten distinct subregions differ in cell morphology, gene expression and aspects of Notch signaling. RNA from isolated regions that was analyzed by RNAseq revealed spatially regulated expression of hundreds of enzymes and other genes with likely tissue functions. 10 midgut segments comprising from 1-3 subregions x 3 replicates from each segment = 30 samples
2013-08-27 | E-GEOD-47780 | biostudies-arrayexpress
Project description:Among the diverse forms of symbioses, facultative nutritional mutualism forged by the host and its resident gut microbiota permits the symbiont to adapt to the changing nutritional environment during the host’s life time. The horizontally acquired gut bacteria in Drosophila are a perfect example of nutritional mutualists. Here, we study the Lactobacillus plantarum (Lp WJL) infection effect in the Drosophila Genetic Reference Panel (DGRP) collection in context of larvae raised in chronic undernutrtion.
2019-05-29 | E-MTAB-6518 | biostudies-arrayexpress
Project description:This study investigated how gut-derived bacterial supplementation influences the honey bee gut microbiota, metabolism, and proteome under three experimental settings: (i) controlled laboratory conditions (C versus B), (ii) semi-controlled laboratory conditions with or without social interaction with older nestmates (COB versus BOB), and (iii) field conditions (CON versus TRT). A bacterial mixture containing Lactobacillus helsingborgensis, L. apis, Bifidobacterium choladohabitans, and B. polysaccharolyticum was administered. Gut samples were collected after 10 days and analyzed for microbiome (16s rRNA sequencing), metabolome (1H NMR), and proteome profiles (LFQ-proteomics, laboratory experiment only). Proteomic profiling revealed distinct group-specific host responses. Control bees (C and COB) upregulated ribosomal proteins linked to protein synthesis and cellular stress. Supplemented bees in group B showed strong induction of major royal jelly proteins (MRJP1 and MRJP5), associated with neural modulation and colony behavior. In BOB, elevated expression of mitochondrial enzymes suggested improved energy metabolism in the presence of social context. Bacterial supplementation induces reproducible, condition-dependent changes across microbiota, metabolic, and proteomic layers. These findings provide mechanistic insight into how microbial interventions reshape gut function and support honey bee health under realistic environmental conditions.
2026-05-15 | PXD066488 | Pride
Project description:ChIP-chip by array of GFP-tagged dFOXO expressed in Drosophila melanogaster adult gut and fat body
2014-08-18 | E-MTAB-1021 | biostudies-arrayexpress
Project description:The polyamines putrescine, spermidine and spermine are ubiquitous metabolites synthesized in all cells. The intracellular levels of polyamines, especially spermidine, decrease in aging. Oral spermidine supplementation has been reported to alleviate aspects of aging-related disease in animal models, including decline in learning and memory. The diverse health benefits of spermidine supplementation, often at doses that do not significantly alter spermidine levels of target organs, suggests that exogenous spermidine may have a common site of action, the gastrointestinal (GI) tract. To directly deliver spermidine to the GI tract with minimum impact on the global spermidine levels, we engineered the probiotic yeast Sacchromyces boulardii (Sb) to overproduce and secrete spermidine. We tested the effects of a spermidine-producing yeast strain (Sb576) on aging-associated learning and memory decline in an olfactory classical conditioning in Drosophila melanogaster. Feeding of newly eclosed flies of the wild-type (w1118) strain for 30 days with food supplemented with live Sb576, but not live wild-type Sb (SbWT) or free spermidine, reduced aging-associated short-term memory (STM) decline. Notably, Sb576 supplementation, but not SbWT or spermidine supplementation, of either young flies or old flies for only three days also enhanced STM without affecting locomotive ability. Furthermore, we showed that Sb576 supplementation also significantly reduced aging-associated STM decline in Dh31R, a mutant strain lacking the diuretic hormone 31 receptor, which exhibits compromised learning and memory. These results demonstrate that in situ production of spermidine by a synthetic biotic yeast in the GI tract can enhance STM, and further suggest a mechanism involving the gut-brain axis.
2025-10-22 | E-MTAB-15806 | biostudies-arrayexpress