Expression profiles of ES cells, epiblast stem cells, and epiblast stem cells reverted to an ES-like state
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ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE17132 | GEO | 2010/02/21
SECONDARY ACCESSION(S): PRJNA123649
REPOSITORIES: GEO
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Project description:Pluripotent stem cells provide a platform to interrogate control elements that function to generate all cell types of the body. Despite their utility for modeling development and disease, the relationship of mouse and human pluripotent stem cell states to one another remains largely undefined. We have shown that mouse embryonic stem (ES) cells and epiblast stem cells (EpiSCs) are distinct, pluripotent states isolated from pre- and post-implantation embryos respectively. Human ES cells are different than mouse ES cells and share defining features with EpiSCs, yet are derived from pre-implantation human embryos. Here we show that EpiSCs can be routinely derived from pre-implantation mouse embryos. The pre-implantation-derived EpiSCs exhibit molecular features and functional properties consistent with bona fide EpiSCs. These results provide a simple method for isolating EpiSCs and offer direct insight into the intrinsic and extrinsic mechanisms that regulate the acquisition of distinct pluripotent states.
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Project description:Pluripotent stem cells provide a platform to interrogate control elements that function to generate all cell types of the body. Despite their utility for modeling development and disease, the relationship of mouse and human pluripotent stem cell states to one another remains largely undefined. We have shown that mouse embryonic stem (ES) cells and epiblast stem cells (EpiSCs) are distinct, pluripotent states isolated from pre- and post-implantation embryos respectively. Human ES cells are different than mouse ES cells and share defining features with EpiSCs, yet are derived from pre-implantation human embryos. Here we show that EpiSCs can be routinely derived from pre-implantation mouse embryos. The pre-implantation-derived EpiSCs exhibit molecular features and functional properties consistent with bona fide EpiSCs. These results provide a simple method for isolating EpiSCs and offer direct insight into the intrinsic and extrinsic mechanisms that regulate the acquisition of distinct pluripotent states. 6 total samples were analyzed. Three pluripotent cell types (mES cells, E3.5 EpiSCs, and E5.5 EpiSCs) were compared with and without treatment of SB431542 for 4 days.
2011-01-25 | E-GEOD-26814 | biostudies-arrayexpress
Project description:Embryonic stem cells (ESCs), which are derived from the primitive ectoderm of pre-implantation blastocysts, are pluripotent cells and can thus contribute to the formation of all somatic cell lineages in chimeric animals. Similarly, epiblast stem cells (EpiSCs), which are derived from epiblast tissue of post-implantation embryos, are also pluripotent and can give rise to derivatives of all three germ layers in teratoma assays. Introduction of the four transcription factors Oct4/Sox2/Klf4/c-Myc into somatic cells has been shown to generate induced pluripotent stem cells (iPSCs). iPSCs exhibit ESC-like properties and are virtually identical to ESCs with respect to a number of charactertistics. However, generation of EpiSC-like cells by direct reprogramming of somatic cells using these transcription factors has not been shown to date. Here we show that Yamanaka’s four transcription factors can be used to directly generate EpiSC-like iPS cells (ePSCs) under EpiSC culture conditions. These ePSCs are identical to EpiSCs with respect to morphology, gene expression pattern, epigenetic status, and chimera formation. This is the first study to demonstrate that the culture environment in transcription factor-mediated reprogramming determines the cell fate of the reprogrammed cell. We could therefore envision that we eventually are able to shape the identity of a directly reprogrammed cell at will simply by modulating the culture conditions. RNA samples to be analyzed on microarrays were prepared using Qiagen RNeasy columns with on-column DNA digestion. 500 ng of total RNA per sample was used as input into a linear amplification protocol (Ambion), which involved synthesis of T7-linked double-stranded cDNA and 12 hrs of in-vitro transcription incorporating biotin-labelled nucleotides. Purified and labelled cRNA was then hybridized for 18 hrs onto MouseRef-8 v2 expression BeadChips (Illumina) according to the manufacturer's instructions. After washing, as recommended, chips were stained with streptavidin-Cy3 (GE Healthcare) and scanned using the iScan reader (Illumina) and accompanying software. Samples were hybridized as biological replicates. 24 samples were analyzed: MEF: Female mouse embryonic fibroblast, 2 biological rep ESC OG2: OG2 female embryonic stem cell, 2 biological rep EpiSC OG2: OG2 female EpiSC grown as single cells with conditioned medium, 2 biological rep EpiSC GOF18: GOF18 EpiSC grown as single cells with conditioned medium, 2 biological rep EpiSC T9b: T9 EpiSC on MEFs in activin-containing CDM, harvested w/o feeders, subconfluent, 2 biological rep ePSC L4: EpiSC-like iPS Cells L4, MEF reprogrammed to EpiSCs with 4F, line L4, grown with LIF and activin, 2 biological rep ePSC L7: EpiSC-like iPS cells L7, MEF reprogrammed to EpiSCs with 4F, line L7, grown with LIF and activin, 2 biological rep ePSC C1: EpiSC-like iPS Cells C1, MEF reprogrammed to EpiSCs with 4F, line C1, grown with LIF and activin, 2 biological rep ePSC C3: EpiSC-like iPS Cells C3, MEF reprogrammed to EpiSCs with 4F, line C3, grown with LIF and activin, 2 biological rep ePSC-R: EpiSC-like iPS Cells reverted, L4 ePSC cells reverted to an ESC-like state using Klf4 virus, 2 biological rep ePSC-RC1: EpiSC-like iPS Cells reverted, L4 ePSR Cre1, Cre-treated L4 ePSR cells, line 1, 2 biological rep ePSC-RC2: EpiSC-like iPS Cells reverted, L4 ePSR Cre2, Cre-treated L4 ePSR cells, line 2, 2 biological rep
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Project description:Occupancy of Mll1 in ESCs and transcriptome of ESCs, EpiSCs and reverted ES by MM401 (Mll1 inhibitor)
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