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A genome-wide analysis reveals that the Drosophila transcription factor, Lola, promotes axon growth in part by suppressing expression of the actin nucleation factor, Spire

ABSTRACT: This SuperSeries is composed of the following subset Series: GSE34121: A genome-wide analysis reveals that the Drosophila transcription factor, Lola, promotes axon growth in part by suppressing expression of the actin nucleation factor, Spire (allele lola_ORE76) GSE34122: A genome-wide analysis reveals that the Drosophila transcription factor, Lola, promotes axon growth in part by suppressing expression of the actin nucleation factor, Spire (allele lola_ORC4) Refer to individual Series

ORGANISM(S): Drosophila melanogaster

SUBMITTER: Edward Giniger

PROVIDER: E-GEOD-34123 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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A genome-wide analysis reveals that the Drosophila transcription factor, Lola, promotes axon growth in part by suppressing expression of the actin nucleation factor, Spire (allele lola_ORE76)

Project description:Transcriptional profiling of Drosophila embryos comparing lola mutant 10-12 hour after egg lay (AEL) embryos to age-matched control embryos. Mutants are homozygous lola nulls (allele lola_ORE76). Two-condition experiment: lola mutant embryos vs. age-matched control embryos. 7 biological replicates, each sample independently collected and containing RNA from approximately 300 embryos. Mutant and control embryos for each replicate were collected simultaneously. Dye-swaps were performed.

2011-12-03 | E-GEOD-34121 | biostudies-arrayexpress

A genome-wide analysis reveals that the Drosophila transcription factor, Lola, promotes axon growth in part by suppressing expression of the actin nucleation factor, Spire (allele lola_ORC4)

Project description:Transcriptional profiling of Drosophila embryos comparing lola mutant 10-12 hour after egg lay (AEL) embryos to age-matched control embryos. Mutants are homozygous isoform K nulls (allele lola_ORC4). Two-condition experiment: lola mutant embryos vs. age-matched control embryos. 7 biological replicates, each sample independently collected and containing RNA from approximately 300 embryos. Mutant and control embryos for each replicate were collected simultaneously. Dye-swaps were performed.

2011-12-03 | E-GEOD-34122 | biostudies-arrayexpress

Resistance of primary ovarian cancer cells to oncolytic adenoviruses part1 of 2

Project description:The mechanisms of primary ovarian cancer cells for resistance to viral oncolysis were investigated using Ad5/35.IR.E1A/TRAIL on clonal cultures derived from ovc316m cells. Part 1 of 2, initital study involving 5 clonal ovc316m cultures Cells were infected for 8 days and cell survival determined by MTT assay. Uninfected control cells of each clonal culture were utilized for DNA expression arrays. SKOV3-ip1 cells were used for reference RNA in all samples.

2010-06-20 | E-GEOD-15350 | biostudies-arrayexpress

Resistance of primary ovarian cancer cells to oncolytic adenoviruses part2 of 2

Project description:The mechanisms of primary ovarian cancer cells for resistance to viral oncolysis were investigated using Ad5/35.IR.E1A/TRAIL on clonal cultures derived from ovc316m cells. Part 2 of 2, 26 clonal ovc316m cultures additionally to Resistance of primary ovarian cancer cells to oncolytic adenoviruses part1 of 2 Cells were infected for 8 days and cell survival determined by MTT assay. Uninfected control cells of each clonal culture were utilized for DNA expression arrays. SKOV3-ip1 cells were used for reference RNA in all samples. The reference RNA from SKOV3-ip1 cells for part 2 of 2 had to be re-amplified.

2009-04-01 | E-GEOD-15351 | biostudies-arrayexpress

Resistance of primary ovarian cancer cells to oncolytic adenoviruses

Project description:This SuperSeries is composed of the following subset Series: GSE15350: Resistance of primary ovarian cancer cells to oncolytic adenoviruses part1 of 2 GSE15351: Resistance of primary ovarian cancer cells to oncolytic adenoviruses part2 of 2 Refer to individual Series

2009-04-01 | E-GEOD-15473 | biostudies-arrayexpress

Gene Expression analysis of hESC B2M knock-out

Project description:The clinical use of human pluripotent stem cells and their derivatives is limited by the rejection of transplanted cells due to differences in their HLA genes. This has led to the proposed use of histocompatible, patient-specific stem cells, however the preparation of many different stem cell lines for clinical use is a daunting task. Here we develop two distinct genetic engineering approaches that address this problem. First, we use a combination of gene targeting and mitotic recombination to derive HLA-homozygous embryonic stem cell (ESC) subclones from an HLA-heterozygous parental line. A small bank of HLA-homozygous stem cells with common haplotypes would match a significant proportion of the population. Second, we derive HLA class I-negative cells by targeted disruption of both alleles of the B2M gene in ESCs. Mixed leukocyte reactions and peptide-specific HLA-restricted CD8+ T cell responses were reduced in class I-negative cells that had undergone differentiation in embryoid bodies. These B2M-/- ESCs could act as universal donor cells in applications where the transplanted cells do not express HLA class II genes. Both approaches used adeno-associated virus (AAV) vectors for efficient gene targeting in the absence of potentially genotoxic nucleases, and produced pluripotent, transgene-free cell lines. Total RNA, 4 samples were analyzed as follows: 2 replicates for the hESC H1 wt ( rep1 and rep2) and 2 independent clones of hESC B2M knock-out

2014-01-01 | E-GEOD-42289 | biostudies-arrayexpress

Discovery of Tamoxifen and N-Desmethyl Tamoxifen Protein Targets in MCF-7 Cells Using Large-Scale Protein Folding and Stability Measurements

Project description:The proteins in an MCF-7 cell line were probed for tamoxifen (TAM) and n-desmethyl tamoxifen (NDT) induced stability changes using the Stability of Proteins from Rates of Oxidation (SPROX) technique in combination with two different quantitative proteomics strategies. Together the SILAC- and iTRAQ-SPROX experiments described here enabled over 1000 proteins to be assayed for TAM- and NDT- induced protein stability changes, and a total of 163 and 200 protein hits were identified in the TAM and NDT studies, respectively. A subset of high confidence hits were assessed for experimental links to the ER using a STRING analysis. TAM was shown to induce stabilization of Y-box binding protein 1 (YBX1), a protein recently shown to bind the estrogen receptor. TAM was shown to directly interact with purified recombinant YBX1 with Pulse Proteolysis (PP). These results support YBX1 as a direct protein target of TAM. Proteins with altered expression levels with TAM and NDT treatment were identified with SILAC quantitation. In total, 799 and 671 proteins were probed for TAM- and NDT- induced expression changes, respectively, and 49 and 30 proteins had altered expression. This work also involved the use of a novel data analysis strategy to identify protein targets of ligands using the SPROX technique.

2019-11-08 | PXD006732 | Pride

Profiling of Lola-N genomic binding in Drosophila with DamID

Project description:The ability to reprogram differentiated cells into a pluripotent state has revealed that the differentiated state is plastic and reversible. It is evident, therefore, that mechanisms must be in place to maintain cells in a differentiated state. Transcription factors that specify neuronal characteristics have been well studied but less is known about the mechanisms that prevent neurons from dedifferentiating to a multipotent, stem cell-like state. Here we identify Lola as a transcription factor that is required to maintain neurons in a differentiated state. We show that Lola represses neural stem cell genes and cell cycle genes in post-mitotic neurons. In lola mutants, neurons dedifferentiate, turn on neural stem cell genes and begin to divide, forming tumours. Thus, neurons rather than stem cells or intermediate progenitors are the tumour-initiating cells in lola mutants. 3 biological relicates were performed for Lola-N (with one dye-swap).

2014-05-06 | E-GEOD-53447 | biostudies-arrayexpress

Expression data from L3 Drosophila antennal-eyediscs

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.

2012-02-20 | E-GEOD-35471 | biostudies-arrayexpress

lola-PJ-GFP_0-12h_embryo_ChIP-seq

Project description:modENCODE_submission_5004 This submission comes from a modENCODE project of Kevin White. For full list of modENCODE projects, see http://www.genome.gov/26524648 Project Goal: The White Lab is aiming to map the association of all the Transcription Factors (TF) on the genome of Drosophila melanogaster. One technique that we use for this purpose is chromatin immunoprecipitation coupled with deep sequencing (ChIP-seq) utilizing an Illumina next generation sequencing platform. The data generated by ChIP-seq experiments consist basically of a plot of signal intensity across the genome. The highest signals correspond to positions in the genome occupied by the tested TF. For data usage terms and conditions, please refer to http://www.genome.gov/27528022 and http://www.genome.gov/Pages/Research/ENCODE/ENCODEDataReleasePolicyFinal2008.pdf EXPERIMENT TYPE: CHIP-seq. BIOLOGICAL SOURCE: Strain: lola-RJ-GFP; Developmental Stage: Embryo 0-12h; Genotype: PBac{y[+]-attP-3B}VK00033; Transgene: lola-RJ genomic coding region; EXPERIMENTAL FACTORS: Developmental Stage Embryo 0-12h; Target gene lola; Strain lola-RJ-GFP; Antibody GFP ab290 (target is Green Fluorescent Protein)

2013-08-11 | E-GEOD-49772 | biostudies-arrayexpress

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