Project description:In adult K14Î?NLef1 mouse, the overexpression of â??NLef1, a Ã?-catenin dominat negative, in basal keratinocytes leads to the conversion of hair follicles into multilayered epithelial cysts and ectopic sebaceous gland. â??NLef1 transcriptional activity led to Gata6 overexpression in the pilosebaceous unit in transgenic mice. To uncover direct target genes of Gata6 we performed ChIP-Seq experiments in primary mouse keratinocytes. Examination of Gata6 genomic targets in mouse primary keratinocytes
Project description:In adult K14ΔNLef1 mouse, the overexpression of ∆NLef1, a ß-catenin dominat negative, in basal keratinocytes leads to the conversion of hair follicles into multilayered epithelial cysts and ectopic sebaceous gland. ∆NLef1 transcriptional activity led to Gata6 overexpression in the pilosebaceous unit in transgenic mice. To uncover direct target genes of Gata6 we performed ChIP-Seq experiments in primary mouse keratinocytes.
Project description:In adult K14ΔNLef1 mouse, the overexpression of ∆NLef1, a ß-catenin dominat negative, in basal keratinocytes leads to the conversion of hair follicles into multilayered epithelial cysts and ectopic sebaceous gland. To uncover direct target genes of ΔNLef1 we performed ChIP-Seq experiments.
Project description:We determined the high resolution methylation maps of female mouse primary keratinocytes and compared these maps at nucleotide level with the female mouse primary dermal fibroblasts. Single nucleotide level methylation maps led us to identify several additional features of CG methylation. We have detected that differentially methylated regions are epigenetically marked in other cells including embryonic stem cells and neuronal progeniator cells. Different new charecteristics and functions were also discovered with these methylation maps. Determinationof whole genome DNA methylation profiles (BS-seq) of primary mouse keratinocytes
Project description:We determined the high resolution methylation maps of female mouse primary keratinocytes and compared these maps at nucleotide level with the female mouse primary dermal fibroblasts. Single nucleotide level methylation maps led us to identify several additional features of CG methylation. We have detected that differentially methylated regions are epigenetically marked in other cells including embryonic stem cells and neuronal progeniator cells. Different new charecteristics and functions were also discovered with these methylation maps.
Project description:Genome-wide DNA methylation at a single nucleotide resolution in different primary cells of the mammalian genome helps to determine the characteristics and functions of tissue-specific hypomethylated regions (TS-HMRs). We determined genome-wide cytosine methylation maps at 91X and 36X coverage of newborn female mouse primary dermal fibroblasts and keratinocytes and compared with mRNA-seq gene expression data.These high coverage methylation maps were used to identify HMRs in both cell types. A total of 2.91% of the genome are in keratinocyte HMRs, and 2.15% of the genome are in fibroblast HMRs with 1.75% being common. Half of the TS-HMRs are extensions of common HMRs, and the remaining are unique TS-HMRs. Four levels of CG methylation are observed: 1) total unmethylation for CG dinucleotides in HMRs in CGIs that are active in all tissues; 2) 10% to 40% methylation for TS-HMRs; 3) 60% methylation for TS-HMRs in cells types where they are not in HMRs; and 4) 70% methylation for the nonfunctioning part of the genome. SINE elements are depleted inside the TS-HMRs, while highly enriched in the surrounding regions. Hypomethylation at the last exon shows gene repression, while demethylation toward the gene body positively correlates with gene expression. The overlapping HMRs have a more complex relationship with gene expression. The common HMRs and TS-HMRs are each enriched for distinct Transcription Factor Binding Sites (TFBS). C/EBP? binds to methylated regions outside of HMRs while CTCF prefers to bind in HMRs, highlighting these two parts of the genome and their potential interactions.Keratinocytes and fibroblasts are of epithelial and mesenchymal origin. High-resolution methylation maps in these two cell types can be used as reference methylomes for analyzing epigenetic mechanisms in several diseases including cancer. Please see related article at the following link: http://www.epigeneticsandchromatin.com/content/7/1/34.