Project description:Physiologically relevant concentrations of retinoic acid are added to Mouse ES cells and a time course (0-72 hours) is examined with expression tiling arrays to characterize the early dynamics of expression of coding and non-coding RNAs in and around the Hox clusters.
Project description:As nucleosomes are widely replaced by protamine in mature human sperm, epigenetic contributions to embryo development appear limited. However, our genome-wide approaches find nucleosomes at low levels genome-wide, but also significantly enriched at imprinted gene clusters, miRNA clusters, HOX gene clusters, and the promoters of other developmental transcription and signaling factors. Developmental promoters were often DNA hypomethylated, and bore histone modifications localized to discrete locations: H3K4me2 is enriched at certain developmental promoters, whereas large blocks of H3K4me3 localize to a subset of developmental promoters, regions in HOX loci, certain non-coding RNAs, and generally to paternally-expressed imprinted loci. In contrast, H3K4me3 is generally absent at paternally-repressed imprinted loci. Interestingly, repressive H3K27me3 is enriched at many developmental promoters that lack early expression in embryos, with significant overlap with bivalent (H3K4me3/H3K27me3) promoters in ES cells. Taken together, epigenetic marking in sperm is extensive, and correlated with developmental regulators.
Project description:As nucleosomes are widely replaced by protamine in mature human sperm, epigenetic contributions to embryo development appear limited. However, our genome-wide approaches find nucleosomes at low levels genome-wide, but also significantly enriched at imprinted gene clusters, miRNA clusters, HOX gene clusters, and the promoters of other developmental transcription and signaling factors. Developmental promoters were often DNA hypomethylated, and bore histone modifications localized to discrete locations: H3K4me2 is enriched at certain developmental promoters, whereas large blocks of H3K4me3 localize to a subset of developmental promoters, regions in HOX loci, certain non-coding RNAs, and generally to paternally-expressed imprinted loci. In contrast, H3K4me3 is generally absent at paternally-repressed imprinted loci. Interestingly, repressive H3K27me3 is enriched at many developmental promoters that lack early expression in embryos, with significant overlap with bivalent (H3K4me3/H3K27me3) promoters in ES cells. Taken together, epigenetic marking in sperm is extensive, and correlated with developmental regulators.
Project description:Physiologically relevant concentrations of retinoic acid are added to Mouse ES cells and a time course (0-72 hours) is examined with expression tiling arrays and RNA-seq to characterize the early dynamics of expression of coding and non-coding RNAs in and around the Hox clusters.
Project description:Physiologically relevant concentrations of retinoic acid are added to Mouse ES cells and a time course (0-72 hours) is examined with tiling array ChIP-chip and RNA-seq to characterize the early dynamics of expression of coding and non-coding RNAs and epigenetics in and around the Hox clusters.
Project description:Physiologically relevant concentrations of retinoic acid are added to Mouse ES cells and a time course (0-72 hours) is examined with expression tiling arrays to characterize the early dynamics of expression of coding and non-coding RNAs in and around the Hox clusters. Gene expression is examined at various timepoints (0-72 hrs) after retinoic acid induced neuronal differentiation
