Failure of cells to respond to DNA damage is a primary event associated with mutagenesis and environmental toxicity. To map the transcriptional network controlling the damage response, we measured genomewide binding locations for 30 damage-related transcription factors (TFs) after exposure of yeast to methyl-methanesulfonate (MMS). The resulting 5272 TF-target interactions revealed extensive changes in the pattern of promoter binding and identified damage-specific binding motifs. As systematic f ...[more]
Project description:In order to identify novel regulators of haematopoietic stem cell emergence in the mouse embryonic AGM region, 3 different types of gene expression comparisons were performed. In the first one, whole dorsal aortas from embryonic day (E) 11 embryos and E9 embryos were dissected, tissues from each time point were pooled and their expression profile compared (whole aorta (WA) E9 vs E11). 3 different pools/biological replicas were obtained for each time point, a dye swap was included in each experiment, a technical replicate was performed for each pool (including the dye swap) and 2 self-self hybridisation controls were included. In the second comparison, GFP+ cells were isolated by fluorescence-activated cell sorting from pooled E9 and E11 aortas from transgenic embryos that express GFP under the regulatory elements of the Ly-6A gene. We obtained one pool for each time point and compared their transcription profile (GFP E9 vs E11). This comparison also contained a dye swap and a technical replicate (also of the dye swap). In the third comparison, the E11 aorta was cut into 3 roughly equal parts. Pools were obtained of the middle region ("m") and the two outer regions, rostral and caudal, together ("r+c") and their expression profile compared (11AO m vs r+c). There was one pool of each population, and the experiment included a dye swap and a technical replicate (also of the dye swap) and one self-self hybridisation control. Isolated RNA was amplified by T7-mediated in vitro transcription, with one round for the first and the third comparison and two rounds for the second comparison (sorted GFP+ cells). Probes were labelled during the reverse transcription step. Within array normalisation was achieved with Lowess Smooth and between arrays with Z scores. ANOVA analysis identified differentially expressed genes and K means clustering was used to segregate them into upregulated and downregulated genes.
Project description:Anaemia negatively affects the prognosis of patients with head and neck squamous cell carcinoma (HNSCC). This study investigates whether anaemia is associated to genetic changes and whether these changes predict the clinical outcome.
Project description:Transcriptional profiling of N. meningitidis grown in anaerobic conditions (with sodium nitrite supplied by adding 40ul 20% w/v solution onto a sterile disc in the centre of the plate) compared to a control grown in capnoaerobic conditions (normal atmosphere +5% CO2)
Project description:Transcriptional profiling of N. gonorrhoeae grown in anaerobic conditions (with sodium nitrite supplied by adding 20% w/v solution to a final concentration of 5mM) compared to a control grown in capnoaerobic conditions (normal atmosphere +5% CO2)
Project description:Ribonucleoprotein immunoprecipitation microarray (RIp-chip) study using various myosin proteins and myosin-specific chaperones from the fission Schizosaccaromyces pombe. Two strains were used. In rng3TAP the rng3 protein has been tagged with TAP to allow its detection and immunoprecipitation. The TAP strain expresses the TAP sequence alone (without being attached to an other protein)
Project description:Transcriptional profiling of N. gonorrhoeae grown in anaerobic conditions (with sodium nitrite supplied by adding 40ul 20% w/v solution onto a sterile disc in the centre of the plate) compared to a control grown in capnoaerobic conditions (normal atmosphere +5% CO2)
Project description:Assess the full impact of estrogen receptor beta on transcription by a full transcriptome analysis of ERa and ERb-mediated gene regulation in T47D breast cancer cell line with TET-OFF regulated ERb expression.