Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

Ecdysone Response Timecourse in Kc Cells

ABSTRACT: Kc167 Cells were plated at 0.5x106/ml and grown at 23.50C. They were treated with 20-HE (Sigma) at a final concentration of 5x10-7M. The reference sample was total RNA isolated at 0 hr. after treatment. The experimental samples were total RNA isolated from cells treated for 1, 3, 6, 12, 24, and 48 hours. Samples were taken at 0hr, 1hr, 3hr, 6hr, 12hr, 24hr and 48hr. Briefly, cells were spun down and Total mRNA was extracted with OligodT (Ambion) nd reverse transcribed in the presence of oligodeothymidine and random hexamers and labeled to the whole genome in-house cDNA microarray and ecdysone responsive genes were identified. Ecdysone responsive genes were identified at each timepoint using a Limma t-test.

ORGANISM(S): Drosophila melanogaster

SUBMITTER: Zareen Gauhar

PROVIDER: E-GEOD-11625 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Genomic mapping of binding regions for the Ecdysone receptor protein complex.

Gauhar Zareen Z Sun Ling V LV Hua Sujun S Mason Christopher E CE Fuchs Florian F Li Tong-Ruei TR Boutros Michael M White Kevin P KP

Genome research 20090223 6

We determined the physical locations of the heterodimeric Ecdysone receptor/Ultraspiracle (ECR/USP) nuclear hormone receptor complex throughout the entire nonrepetitive genome of Drosophila melanogaster using a cell line (Kc167) that differentiates in response to 20-hydroxyecdysone (20-HE). 20-HE, the natural ligand of this complex, controls major aspects of insect development, including molting, metamorphosis, and reproduction. Direct gene targets of 20-HE signaling were identified by combining ...[more]

PMID: 19237466

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Project description:Competition is a major determinant of plant community structure consisting of both species-specific and general interactions, either of which may influence competitive competency and plant abundance and size. In certain cases, competitive competency could arise from altered gene expression and plant function when an individual is confronted with new competitors. We explored competition at the molecular level by hybridizing transcripts from Centaurea maculosa (spotted knapweed), one of North America's most invasive exotic plant species, to an Arabidopsis microarray chip. Centaurea was grown in competition with Festuca idahoensis (Idaho fescue), a native grass species that generally has weak competitive effects against Centaurea; Gaillardia aristata (Indian blanketflower), a native herbaceous species that tends to be a much stronger competitor against Centaurea; or alone (control). The expression of some genes was found to be relatively uninfluenced by the type of plant neighbor, whereas other patterns of gene expression appeared to be more neighbor specific. To our knowledge, these results are the first to identify genes in an invasive plant that are induced or repressed by plant neighbors and provide a new avenue of insight into the molecular aspects of plant competitive ability. Keywords: treated vs.untreated First file, Chip 508 (9-9-05) is preliminary hyb data to see if this cross species hybridization is possible using the OAR27K chip Experiment 1 (chip 508): The Arabidopsis OAR27K gene chip was hybridized with labeled cDNA probes produced from samples of Centaurea RNA at the W.M. Keck Foundation Biotechnology Resource Laboratory, Yale University. The OAR27K gene chip consists of 70-mer oligos representing approximately 27,000 genes from Arabidopsis. Leaf and root samples were reverse-transcribed into cDNA and labeled with different fluorescent dyes (Cy3 and Cy5) using the Genisphere Array 900 kit (Cat No.W500180) (Genisphere, Hatfield PA). Labeled cDNAs were hybridized to the OAR27Kchip using the Advalytix ArrayBooster DNA Microarray Incubator (Advalytix, Boston MA). Approximately 10ug of each sample was used for hybridization.Experiment 2: Hybridization and labeling followed the procedure above, except the experimental control was Centaurea plants grown alone, and the test situations were Centaurea grown with Gaillardia or Festuca neighbors. In each experiment, RNA from Centaurea grown alone was used as the control (labeled with Cy3) and RNA from Centaurea grown with a neighbor was used as the test (labeled with Cy5). Two replicates were performed for each test situation.

Dataset Information

Ecdysone Response Timecourse in Kc Cells

Publications

Genomic mapping of binding regions for the Ecdysone receptor protein complex.

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