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. Gene expression in brain and antennae was measured at 0hr and 28 hours starved. Four independent experiments were performed at each time using different flies for each experiment.
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.
Project description:Sex-specific gene expression in sensory organs may play an important role in mating and foraging behavior. We used long-oligonucleotide microarrays to compare gene expression profiles of males and females in three adult appendages that carry large numbers of chemosensory organs â antenna, proboscis, and front leg. Keywords: tissue-specific expression profiles Drosophila isogenic line WI89 was used. Adult male and female antennae (a3+arista), front legs (from distal tibia down), and proboscises were dissected at 1-2 hours after eclosion. Total RNA was extracted and the mRNA fraction was amplified by reverse transcription followed by in vitro transcription with T7 RNA polymerase.
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.
Project description:One function of plant lectins is to serve as defenses against herbivorous insects. The midgut is the critical site affected by dietary lectins such as wheat germ agglutinin (WGA). We observed marked cellular structural and gene expression changes in Drosophila melanogaster third-instar larval midguts from insects WGA-fed or starved. Dietary WGA caused shortening, branching, swelling, distortion and in some cases disintegration of the midgut microvilli (Mv). Starvation was accompanied by shortening of the Mv. Microarray analyses revealed that dietary WGA evolved differential expression of 62 transcripts; seven of which were also differentially expressed in starved insects. The differentially regulated gene cluster in WGA-fed larvae were associated with (i) cytoskeletal organization, (ii) immune responses, (iii) detoxification reactions, and (iv) energy metabolism. Four putative transcription factor binding motifs (TFBMs) were associated with the differentially-expressed genes. At least one of these putative TFBMs exhibited substantial similarity to MyoD, a TFBM associated with cellular structures in mammals. These results are in keeping with the hypothesis that WGA causes a starvation-like effect as well as structural changes of midgut cells of Drosophila third-instar larvae. Keywords: stress response
Project description:To understand gene expression changes in different regions of the Drosophila brain with age, we performed RNAseq different regions of the adult drosophila CNS at different ages.
Project description:dG9a-depletion decreases the starvation resistance in the adult stage of Drosophila melanogaster. To determine which genes are regulated by dG9a under starvation stress, we examined mRNA levels by performing RNA-sequence analysis using 0 h and 12 h starved dG9a null mutant and wild type as a control.
Project description:We identified genes whose expression is enriched in the D. melanogaster antennal olfactory subsystems that express Odorant receptors (Ors) or Ionotropic receptors (Irs) by microarray analysis of RNA extracted from antennae of wild-type (Oregon R P2) animals, ato mutants (which lack the Ir subsystem) and amos mutants (which lack the Or subsystem).
