Project description:We used custom Nimblegen microarrays to determine the DNA methylation profiles of iPS cells, ES cells, and fibroblasts. We isolated genomic DNA from iPS cells, ES cells, and fibroblasts and hybridized to custom-designed Nimblegen microarrays (CHARM arrays).
Project description:Genome-wide DNA methylation of early and late passaged keratinocyte-derived iPS cells were compared to ES cells. We used custom Nimblegen microarrays to determine the genome-wide DNA methylation in human keratinocyte-derived iPS cells and ES cells
Project description:This SuperSeries is composed of the following subset Series: GSE27134: DNA methylation data from human iPS cells, ES cells, cord blood, and keratinocytes GSE27186: Expression data of human somatic cell types and induced pluripotent stem cells GSE31742: DNA methylation data from human keratinocyte-derived iPS cells (N9) and ES cells Refer to individual Series
Project description:This SuperSeries is composed of the following subset Series: GSE18226: Expression data from human iPS cells and fibroblasts GSE18227: DNA methylation data from human iPS cells and fibroblasts Refer to individual Series
Project description:Genome-wide DNA methylation was studied to determine whether iPS cells retain epigenetic memory at loci associated with its tissue of origin. We used custom Nimblegen microarrays to determine the genome-wide DNA methylation in human iPS cells, ES cells, and somatic cells
Project description:We have previously shown that pluripotent stem cells are induced from mouse fibroblasts by retroviral introduction of Oct3/4, Sox2, c-Myc and Klf4, and subsequent selection for Fbx15 expression. These iPS (induced pluripotent stem) cells are similar to embryonic stem (ES) cells in morphology, proliferation and teratoma formation. Fbx15-iPS cells, however, are different in gene expression and DNA methylation patterns and fail to produce adult chimeras. Here we show that selection for Nanog results in germ-line competent iPS cells, with more ES cell-like gene expression and DNA methylation patterns. The four transgenes were strongly silenced. We obtained adult chimeras from seven Nanog-iPS clones, with one clone transmitted through the germ-line to the next generation. Approximately 20% of the offspring developed tumors, where c-Myc transgene was reactivated. Thus iPS cells competent for germ-line chimeras can be obtained from fibroblasts, but retroviral introduction of c-Myc should be avoided for clinical application. Keywords: cell type comparison
