Project description:Background: We would like to use Drosophila cell lines to investigate the transcriptional responses to Nitric Oxide donors and inhibitors. As a pilot to this we would like to compare the transcriptional profile of 3 cell lines we are using in our lab (S3, Kc and S3). This study is being done in parallel to an in vivo genetic screen to indentify required genes. This work is funded by the BBSRC. Plan: Pairwise comparisons of each cell line to the other two. Cells will be grown at low density in identical conditions. Cells will be harvested and RNA prepared in Trizol as recommended.
Project description:The C-line contains additional copies of chalcone synthase (CHS) and these result in silencing of the endogenous copy at tt4. The clv1-2 mutation was introduced into this line as a second marker. The line was mutagenised and several revertants obtained which show reduced silencing. The best characterised of these is hog1. The hog1 mutant shows reduced DNA methylation and more intact CHS transcript in Northern blots. I have been funded by the BBSRC gene flow initiative to look for downstream targets of DNA methylation by looking for genes which are up or down regulated by hog1. Three week old plants of the genotype C/C clv1-2 with or without the hog1 mutation will be used to prepare RNA for the study. I have set the sample size at two slides for each sample.
Project description:The aim of this BBSRC-funded project is to develop laser-capture microdissection (LCMD) to isolate small cell clusters in different regions of arabidopsis embryos at different stages of development; to develop RNA amplification procedures on dissected tissue sampes; and to use DNA microarray techniques to investigate global transcriptional differences between samples. Cryosectioned embryos of ecotype Col-O of globular, heart and torpedo stage were used to isolate cell clusters from the apical and basal regions, for RNA isolation and amplification. !Samples will be provided as T7-primed cDNA, with three biological replicates for each tissue to be analysed. Each replicate comprises cDNA from pooled tissue samples from ca. 15 embryos. The experimental details have been discussed with Sean May et al. at NASC. Experimenter name = Stuart Casson and Matthew Spencer Experimenter phone = 0191 374 7356 Experimenter fax = 0191 374 2417 Experimenter institute = Durham University Experimenter address = Integrative Cell Biology Laboratory Experimenter address = School of Biological Sciences Experimenter address = Durham University Experimenter address = South Road Experimenter address = Durham Experimenter zip/postal_code = DH1 3LE Experimenter country = UK Keywords: organism_part_comparison_design; development_or_differentiation_design