Gene expression in brain and antennae of starved and fed Drosophilla adult
Ontology highlight
ABSTRACT:
ORGANISM(S): Drosophila melanogaster
SUBMITTER: Abu Farhan
PROVIDER: E-GEOD-48077 | biostudies-arrayexpress |
REPOSITORIES: biostudies-arrayexpress
Similar Datasets
Project description:We found in our behavior experiment clearly distinnct olfactory responses in fed vs starved flies in response to differrent odors.To investigate the molecular basis of the starvation mediated olfactory modulation process, we compared gene expression at the level of the antenna and the brain for fed and starved flies.
2013-06-20 | GSE48077 | GEO
Project description:This project’s aim was to compare the transcriptional profiles of olfactory sensory neurons in Drosophila melanogaster in order to identify novel genes that specify neuron-specific functions/phenotypes or may otherwise be involved in the development of the olfactory system. The isolation of sufficient numbers of intact olfactory sensory neurons (OSN) from the antenna of Drosophila melanogaster has so far limited single-cell transcriptomic approaches being applied to the adult fly antenna. Targeted DamID (TaDa) provides an alternative approach for profiling transcriptional activity in a cell-specific manor that bypasses the need for isolating OSN. Using the Gal4/UAS system, we applied TaDa to seven OSN populations and compared differences in Pol II occupancy for genes across these datasets.
2021-03-17 | E-MTAB-8935 | biostudies-arrayexpress
Project description:We assessed the differential expression of genes in the adult antennae of pnt RNAi and control flies to understand how the expressions of olfactory receptors could change in response to cell fate alteration in the antennae.
2018-12-04 | GSE113997 | GEO
Project description:In this RNA-seq study, we compared the antennal transcriptomes of sexually mature drones (males) and time-trained foragers (females) of Apis mellifera collected at different times of day and different activity states. The goals of our project was to provide a more comprehensive description of gene expression differences between drone and forager antennae. Most studies on insect antennal transcriptome still focus on identifying and reporting genes involved in odorant binding and detection. In contrast, we also aimed at identifying so far unrecognised molecules, not directly involved in odorant detection, but likely playing an important role in peripheral olfactory processing. We also wanted to explore whether daily changes in gene expression and correlations between gene expression levels and behavioral activity might be a fruitful approach to identify additional genes involved in odorant reception. Apis mellifera drones perform mating flight in the afternoon around 14:00 hour (h) in Bangalore, India. During their daily mating flight activity, drones were caught at the hive entrance and color marked on the thorax. On the next day color-marked drones were collected at two different time points: 9:00 (inactive) and 14:00 h (active). Honey bee foragers can be trained to visit a food source at a specific time of the day. In this study, an A. mellifera colony was transferred in an enclosed outdoor flight cage to train the foragers to visit a feeder at a specific time of the day. A sucrose reward (1M sucrose solution) was presented either from 8:00 to 10:00 h (morning training) or from 13:00 to 15:00 h (afternoon training) for 10 consecutive days. On the 8th, 9th and 10th day of training, foragers visiting the feeder were marked on their thorax with different colors, one type of color each day, to identify the frequently visiting foragers. On the 11th day, the feeder was not presented and the foragers that had all 3 color marks were collected at 9:00 and 14:00 h. All the samples were immediately flash frozen in liquid nitrogen. Collected samples were transferred from liquid nitrogen onto dry ice and the entire antennae (i.e. scape, pedicel and flagellum) were cut off. We pooled 10 antennae from 5 bees per sample and extracted total RNA using Trizol method. Antennal transcriptomes of drones (n=3 per time point), morning-trained foragers (n=2 per time point) and afternoon-trained foragers (n=2 per time point) were sequenced at 2 different time points (9:00 h and 14:00 h).
2020-05-31 | E-MTAB-8489 | biostudies-arrayexpress
Project description:To better understand the olfactory mechanisms in G. mellonella, we established six transcriptomes from the antennae of male and female adults. A total of 226 chemosensory gene transcripts were identified, which included 36 chemosensory proteins, 52 odorant-binding proteins, 2 sensory neuron membrane proteins, 80 olfactory receptors, and 56 ionotropic receptors. The expression patterns of these genes were calculated from the estimated fragments per kilobase of transcript sequence per million fragments mapped, and the differentially expressed genes (DEGs) related to olfaction were validated by qRT-PCR. Among the 114 DEGs identified, 66 were exclusively or primarily expressed in the female antenna, whereas the rest were specifically expressed in the male antenna. These antenna-specific genes may provide useful subjects for advanced studies of their biological functions; this may provide a theoretical basis for the control of G. mellonella and the prevention of damage caused by this species using the male pheromone as a bait.
2020-12-06 | GSE107887 | GEO
Project description:Loxodes magnus starved/fed RNAseq
| PRJEB55324 | ENA
Project description:Gene expression in brain and antennae of starved and fed Drosophilla adult
| PRJNA208951 | ENA
Project description:In other experiments, we found that hygienic honey bees show lateralized responses to odors associated with brood disease. Bees are also known to have more olfactory sensilla on their right antenna compared to their left. Following this, we performed proteomics on right and left antennae of hygienic honey bees in order to identify a molecular basis for lateralization (N = 5); however, we did not identify any significantly different proteins.
2017-12-07 | PXD005242 | Pride
Project description:The purpose of this experiment was to compare RNA-seq profiles of adult male and female butterfly chemosensory tissues to identify tissue- and sex-specific differences in gustatory and olfactory gene expression. Three biological replicates per sex were produced from individual Heliconius melpomene rosina butterflies. For the antennal libraries, both antennae were used, for the labial palps + proboscis libraries both labial palps and each proboscis was used, and for the leg libraries all six legs were used.
2014-02-14 | E-MTAB-1500 | biostudies-arrayexpress
Project description:Background Antennae of fruit flies are the major organs responsible for detecting environmental volatiles, e.g., egg-laying substrates. An adult antenna contains many sensilla full of olfactory sensory neurons, where olfactory receptor (Or) genes are expressed. Each sensory neuron only expresses up to three receptors, making it difficult to estimate expression levels by conventional methods. In this study, we applied Illumina RNA sequencing (RNA-seq) to study the expression levels of Or and other genes in fly antennae. Results RNA from approximately 1,200 pairs of adult antennae from each sex of Drosophila melanogaster was used to obtain the antennal transcriptome of each sex. We detected approximately 12,000 genes expressed in antennae of either sex. The most highly expressed genes included pheromone-binding genes, transmembrane transporter genes, and sensory reception genes. Among the 61 annotated Or genes, we observed 53 and 54 genes (approximately 90%) expressed (fragments per kilobase of exon per million fragments mapped (FPKM) > 0.05) in male and female antennae, respectively; approximately 25 genes were expressed with FPKM > 15. Compared to previous studies, which extracted RNA from the whole body or head and used microarrays, antenna-specific transcriptomes obtained by RNA-seq provided more reliable estimates of gene expression levels and revealed many lowly expressed genes. Ninty-one genes, including one odorant-binding protein (Obp) gene and four Or genes, were differentially expressed between male and female antennae. These sexually biased genes were enriched on the X chromosome and showed enrichment in different gene ontology categories for male and female flies. The present and previous data together suggest that a gene family with putative immune response functions is related to pheromone detection and involved in the courtship behavior of male flies. Conclusions Tissue-specific RNA-seq is powerful for detecting lowly expressed genes. Our study provides new insight into the expression of olfactory-related genes in Drosophila antennae.ophila sechellia relies exclusively on the fruits of Morinda citrifolia, which are toxic to most insects, including its sibling species D. melanogaster and D. simulans. Although several odorant binding protein (Obp) genes and olfactory receptor (Or) genes were suggested to be associated with the D. sechellia host shift, a broad view of how chemosensory genes have contributed to this shift is still lacking. We therefore studied the antennal transcriptomes, the main organ responsible for detecting food resource and oviposition, of D. sechellia and its two sibling species. We wanted to know whether gene expression, particularly chemosensory genes, has diverged between D. sechellia and its two sibling species. Using a very stringent definition of differential gene expression, we found 147 genes (including 11 chemosensory genes) were up-regulated while only 81 genes (including 5 chemosensory genes) were down-regulated in D. sechellia. Interestingly, Obp50a exhibited the highest up-regulation, a ~100 fold increase, and Or85c – previously reported to be a larva-specific gene– showed ~20 fold up-regulation in D. sechellia. Furthermore, Ir84a, proposed to be associated with male courtship behavior, is significantly up-regulated in D. sechellia. We also found expression divergence in most of the receptor gene families between D. sechellia and the two sibling species. Our observations suggest that the host shift of D. sechellia is associated with expression profile divergence in all chemosensory gene families and is achieved mostly by up-regulation of chemosensory genes.the evolutionary behaviour of Polycomb group proteins, their recruitment factors and their underlying sequences by performing ChIP-seq analysis in 4-5 different Drosophila species (GSE60428) and HiC analysis in Drosophila melanogaster. We demonstrate an extremely high conservation of Polycomb repressive domains across Drosophila species We validate few cases of PRE divergence that shows that cis-driven PRE evolution is a rare event. We further show that PHO recruitment to Polycomb domains is evolutionarily robust to motif changes and that PRC1 stabilizes binding of its key recruiter
2017-06-01 | GSE99545 | GEO