Project description:In order to study how ectopic Yki drives tissue overgrowth in Drosophila imaginal discs, we overexpressed the constitutively active Yki3SA and deleted wts in clones of cells in the entire eye-antennal imaginal disc, as well as specifically in eye disc proper cells using Optix-Gal4. Using the MARCM system allowed us to compare the effects of Yki3SA overexpression in wild-type and sd mutant clones.
Project description:We obtained transcriptional profiles of third instar eye imaginal disc nuclei with or without endoplasmic reticulum stress using next generation sequencing (NGS). We employed an isolation of nuclei tagged in specific cell type (INTACT) protocol (Ma and Weake, J. of Vis. Exp., 2014) to label nuclear membranes of GMR-GAL4-expressing cells with EGFP. The experimental group also expressed a mutant allele of the membrane visual protein rhodopsin (Rh-1(G69D)), which is known to cause endoplasmic reticulum stress and initiate Unfolded Protein Response (UPR) signaling. The goal of this study was to characterize the transcriptional changes associated with endoplasmic reticulum stress responses in a commonly used platform, the eye imaginal disc.
Project description:Drosophila imaginal disc cells exhibit a remarkable ability to switch cell fates under various perturbations, a phenomenon known as transdetermination (TD). The winged eye (wge) gene induces eye-to-wing TD by its overexpression in eye imaginal discs using eye specific Gal4 driver (eyeless-Gal4). Gene network controlling this process, however, is largely unclear. Additionally, we identified that heterochromatin-related histone methyltransferase Su(var)3-9 is essential for wge-mediated TD. We used microarray to detail the global gene network underlying wge-mediated eye-to-wing TD, and the involvement of Su(var)3-9 in the gene network.
Project description:We report here the transcriptomic analysis of Drosophila melanogaster wing imaginal discs from third instar female larvae expressing Cyclin G deleted of the PEST domain (the 25 COOH-terminal amin-acids) under the control of the daugterless-Gal4 ubiquitous driver. The negative control was transgenic flies wearing only the daugterless-Gal4 driver.
Project description:Growth of the drosophila eye imaginal discs is controlled by the activation of Notch in the dorsal-ventral boundary. Overexpression in the eye disc of the Notch ligand Delta together with lola and pipsqueak from the GS(2)88A8 line induces tumoral growth. We used microarray to analyze the expression profile of tumoral discs. Antennal-eye discs of Drosophila L3 larvae were selected for RNA extraction and hybridization on Affymetrix microarrayas. Two genetic conditions were analyzed: tumoral eye discs (ey-Gal4 GS(2)88A8 UAS-Dl) and control eye discs (GS(2)88A8 UAS-Dl). Three different biological replicates of each condition, each one consisting on 300 hundred pairs of eye discs, were analyzed.
Project description:We describe here the genome-wide binding sites of Cyclin G in Drosophila melanogaster wing imaginal discs from third instar female larvae. We used a transgenic line expressing a version Cyclin G deleted of the PEST domain (the 25 COOH-terminal amin-acids) and tagged by Myc under the control of the daugterless-Gal4 ubiquitous driver.
