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Gene expression analysis during reprogramming with sequential infecion of Oct4/Klf4/cMyc/Sox2

ABSTRACT: To further understand the mechanism of reprogramming, the mouse embryonic fibroblast cells were infected with Oct4, Klf4, c-Myc and Sox2 with special sequence. 1) Oct4 and Klf4 containing retrovirus was delivered on day 0. 2) Oct4, Klf4 and c-Myc were delivered on Day 1.5. 3) c-Myc and Sox-2 were deivered on Day 3. 4) Sox2 were delivered on Day 4.5. 5) Vitamin C containging medium were used from Day 6. The gene expression of Day 0 (MEF), Day 1.5, Day 3, Day 4.5 and Day 6 were analyzed with micro array to indentify the possible underlying mechanism. Especially the factors related to MET/EMT, cell cycle and epigenetic were focused.

ORGANISM(S): Mus musculus

PROVIDER: GSE39260 | GEO | 2012/07/12

SECONDARY ACCESSION(S): PRJNA170418

REPOSITORIES: GEO

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Gene expression analysis during reprogramming with sequential infecion of Oct4/Klf4/cMyc/Sox2

Project description:To further understand the mechanism of reprogramming, the mouse embryonic fibroblast cells were infected with Oct4, Klf4, c-Myc and Sox2 with special sequence. 1) Oct4 and Klf4 containing retrovirus was delivered on day 0. 2) Oct4, Klf4 and c-Myc were delivered on Day 1.5. 3) c-Myc and Sox-2 were deivered on Day 3. 4) Sox2 were delivered on Day 4.5. 5) Vitamin C containging medium were used from Day 6. The gene expression of Day 0 (MEF), Day 1.5, Day 3, Day 4.5 and Day 6 were analyzed with micro array to indentify the possible underlying mechanism. Especially the factors related to MET/EMT, cell cycle and epigenetic were focused. MEF cells were subjected for reprogramming with special protoocl: 1) Oct4 and Klf4 containing retrovirus were delivered on day 0. 2) Oct4, Klf4 and c-Myc were delivered on Day 1.5. 3) c-Myc and Sox-2 were deivered on Day 3. 4) Sox2 were delivered on Day 4.5. 5) Vitamin C containging medium were used from Day 6. RNA on Day 0 (MEF), Day 1.5, Day 3, Day 4.5 and Day 6 were collected for analysis.

2012-07-11 | E-GEOD-39260 | biostudies-arrayexpress

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A general transcription co-factor, Smad3, potentiates master transcription factor mediated cell identity conversions [ATAC-seq]

Project description:We have identified that expression of constitutive active Smad3 (Smad3CA) significantly enhanced reprogramming by Oct4, Sox2, Klf4, c-Myc. To investigate how Smad3CA expression impacts on chromatin opening, we performed ATAC-seq on day 3 of reprogramming in the presence or absence of Smad3CA expression.

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Pluripotency-Independent Induction of Human Trophoblast Stem Cells from Fibroblasts [ChIP-Seq]

Project description:ChIP-seq analysis revealed similarity/dissimilarity in deposition of H3K4me2 histone mark between human blastocyst derived trophoblast stem cells (hbdTSCs), human foreskin fibroblasts (HFFs) and pluripotent stem cells (hESCs) compared with HFFs which underwent 3 days of ectopic expression of GATA3, OCT4, KLF4, MYC (GOKM) or OCT4, SOX2, KLF4 and MYC (OSKM).

2023-02-21 | GSE182013 | GEO

Determination of the protein interactome of the transcription factor Sox2 in embryonic stem cells engineered for inducible expression of four reprogramming factors

Project description:Coordinate expression of the somatic cell reprogramming factors Oct4, Sox2, Klf4 and c-Myc within embryonic stem cells preserves the self-renewal of these cells, while allowing for the expression epitope tagged Sox2. Taking advantage of this observation, we engineered embryonic stem cells (i-OSKM-ESC) to inducibly express Oct4, Klf4, c-Myc and an epitope tagged form of Sox2 from a polycistronic element, in the presence of doxycycline. We isolated Sox2 and its associated protein complexes by co-immunoprecipitation. Subsequently, we identified the Sox2-protein interactome in self-renewing embryonic stem cells using an unbiased proteomic screen (Multidimensional Protein Identification Technology [MudPIT]). Affymetrix microarrays were used to characterize the gene expression profile of i-OSKM-ESC in the absence and presence of doxycycline. Mouse embryonic stem cells (KH2) were engineered to express Oct4, epitope tagged Sox2, Klf4 and c-Myc in the presence of doxycyline, to produce i-OSKM-ESC. The i-OSKM-ESC were cultured in the absence or presence of doxycyline (4 Âµg/mL) for 24 hours. RNA was extracted from each condition, and used for microarray analysis.

2012-02-20 | E-GEOD-34801 | biostudies-arrayexpress

PICH promotes reprogramming of somatic cells to iPSCs by alleviating DNA replication stress-induced genomic instability

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Gene expression changes upon Dot1L knockdown and Dot1L inhibitor treatment during reprogramming

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2012-03-01 | E-GEOD-29253 | biostudies-arrayexpress

Transcription profiling of mouse adult neural stem cells exogenously expressing Oct4 produces one-factor induced pluripotent stem (1F iPS)

Project description:Pluripotency can be induced in murine and human fibroblast by transduction of four transcription factors (Oct4, Sox2, Klf4 and c-Myc). Previously we reported that two factors (Oct4 and Klf4) are sufficient for reprogramming adult mouse neural stem cells (NSCs) to a pluripotent state. However, although NSCs endogenously express the factors Sox2, c-Myc, and Klf4, our previous report does not elucidate why exogenous expression of either Klf4 or c-Myc is still required for reprogramming. Here we report that exogenous expression of Oct4 is sufficient to generate one-factor induced pluripotent stem (1F iPS) cells without any oncogenic factors, such as c-Myc and Klf4, from mouse adult NSCs, which endogenously express Sox2, c-Myc, and Klf4, and also intermediate reprogramming markers alkaline phosphatase (AP), stage-specific embryonic antigen-1 (SSEA-1). These results extend our previous report proposing that somatic cells can be reprogrammed to a pluripotent state with a reducing number of reprogramming factors when the complementing factors are endogenously expressed in the somatic cells. Experiment Overall Design: 10 hybridizations in total. Experiment Overall Design: NSC-derived iPS cells by one-factor (Oct4) in triplicate: Experiment Overall Design: - NSC_1F_iPS_1 Experiment Overall Design: - NSC_1F_iPS_2 Experiment Overall Design: - NSC_1F_iPS_3 Experiment Overall Design: One-factor (Oct4) iPS cell-derived NSC in triplicate: Experiment Overall Design: - 1F_iPS_NSC_1 Experiment Overall Design: - 1F_iPS_NSC_2 Experiment Overall Design: - 1F_iPS_NSC_3 Experiment Overall Design: Neural stem cell (NSC) derived from brain of OG2/Rosa26 mice: Experiment Overall Design: - NSC_1 Experiment Overall Design: - NSC_2 Experiment Overall Design: - NSC_3 Experiment Overall Design: - NSC_4

2009-02-08 | E-GEOD-12499 | biostudies-arrayexpress

mRNA expression in iPS cells generated by a synthetic self-replicative RNA

Project description:We generated iPS cells with a synthetic self-replicative RNA that expresses four independent reprogramming factors (OCT4, KLF4, SOX2 and either c-MYC or GLIS1). We performed whole genome RNA sequencing (RNA-seq) of iPS cell clones, parental BJ and HUES9 ES cell controls. All iPS cell clones analyzed by RNA-seq showed unsupervised hierarchical clustering and expression signatures characteristic of human HUES9 ES cells that were highly divergent from parental human fibroblasts. RNA-seq in two OKS-iM iPS clones (generated from OCT4, KLF4, SOX2 and cMYC expressing RNA replicon), two OKS-iG clones (generated from OCT4, KLF4, SOX2 and GLIS1 expressing RNA replicon), HUES9 and BJ cells.

2014-04-25 | E-GEOD-38265 | biostudies-arrayexpress

Oct4-Induced Pluripotency in Adult Neural Stem Cells

Project description:The four transcription factors Oct4, Sox2, Klf4, and c-Myc can induce pluripotency in mouse and human fibroblasts. We previously described direct reprogramming of adult mouse neural stem cells (NSCs) by Oct4 and either Klf4 or c-Myc. NSCs endogenously express Sox2, c-Myc, and Klf4 as well as several intermediate reprogramming markers. Here we report that exogenous expression of the germline-specific transcription factor Oct4 is sufficient to generate pluripotent stem cells from adult mouse NSCs. These one-factor induced pluripotent stem (1F iPS) cells are similar to embryonic stem cells in vitro and in vivo. Not only can these cells be efficiently differentiated into NSCs, cardiomyocytes and germ cells in vitro, but they are also capable of teratoma formation and germline transmission in vivo. Our results demonstrate that Oct4 is required and sufficient to directly reprogram NSCs to pluripotency.

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