Project description:We analyzed chromatin opening in hepatocytes isolated from Apclox/loxlivers, after injection of adenovirus Ad5 -Cre-GFP and sorting on the basis of GFP signal at day 6, 15 and 21 post-injection. Our aims was to study the impact of an aberrant beta-catenin activation on chromatin opening in hepatocytes during the early steps of liver tumorigenesis.
Project description:We analyzed chromatin opening in hepatocytes isolated from ApcDeletaHep livers or wt by ATAC-seq. We thus explore how an aberrant activation of beta-catenin signaling modifies chromatin structure in hepatocytes
Project description:We analyzed the level of DNA methylation by MeDIPseq in hepatocytes isolated by collagenase perfusion from Apclox/loxlivers, six days after injection of 2mg tamoxifen vs wt hepatocytes. Our aims was to study the impact of the beta-catenin on DNA methylation during the early steps of liver tumorigenesis
Project description:We analyzed the expression of RNAs in hepatocytes isolated from Apclox/lox livers, after injection of adenovirus Ad5-Cre-GFP and hepatocyte sorting on the basis of GFP signal at day 6, 15 and 21 post-injection. Our aims was to study the transcriptional impact of the beta-catenin during the early steps of liver tumorigenesis.
Project description:RNA-binding proteins play a key role in shaping gene expression profiles during stress, however, little is known about the dynamic nature of these interactions and how this influences the kinetics of gene expression. To address this, we developed kinetic χCRAC, a UV cross-linking method that enabled us to quantitatively measure the dynamics of protein-RNA interactions in vivo on a minute time-scale. Here, using kinetic χCRAC we measure the global RNA-binding dynamics of the yeast transcription termination factor Nab3 in response to glucose starvation. These measurement reveal rapid changes in protein-RNA interactions within one minute following stress imposition. Changes in Nab3 binding are largely independent of alterations in transcription rate during the early stages of stress response, indicating orthogonal transcriptional control mechanisms. We also uncover a function for Nab3 in dampening expression of stress-responsive genes. Kinetic χCRAC has the potential to greatly enhance our understanding of in vivo dynamics of protein-RNA interactions.