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RNA-seq of WT, Tet1-/-, Tet2-/-, Tet1-/-:Tet2-/- (DKO), and Tet1-/-:Tet2-/-:Tet3-/- (TKO) murine embryonic stem cells following six days of LIF withdrawal.

ABSTRACT: The goal of this study was to identify transcriptional differences between varying combinations of Tet deletion clones following six days of LIF withdrawal. These libraries were generated from cells under normal culture conditions.

ORGANISM(S): Mus musculus

PROVIDER: GSE119443 | GEO | 2019/06/26

REPOSITORIES: GEO

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RNA-seq of WT, Tet1-/-, Tet2-/-, Tet1-/-:Tet2-/- (DKO), and Tet1-/-:Tet2-/-:Tet3-/- (TKO) murine embryonic stem cells following six days of LIF withdrawal.

Project description:RNA-seq of WT, Tet1-/-, Tet2-/-, Tet1-/-:Tet2-/- (DKO), and Tet1-/-:Tet2-/-:Tet3-/- (TKO) murine embryonic stem cells following six days of LIF withdrawal.

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Project description:In order to identify the genes involved in LIF/gp130 self-renewal response, we analyzed the transcriptome of Gs2 ES cells induced to differentiate upon LIF withdrawal for 16h, 24h and 48h (LIF16, LIF24 and LIF48 respectively)and compared them to that of undifferentiated ES Gs2 cells continuously maintained in the presence of LIF. Since this cell line also carry a tetracycline regulatable dominant negative form of Stat3 (Stat3F, all the experiment was done in the presence of Tetracycline (tet ON) to avoid Stat3F expression. Keywords: time-course

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Acute depletion of Tet1-dependent 5-hydroxymethylcytosine levels impairs LIF/Stat3 signaling and results in loss of embryonic stem cell identity [MRE-seq]

Project description:The TET family of FE(II) and 2-oxoglutarate-dependent enzymes (Tet1/2/3) promote DNA demethylation by converting 5-methylcytosine to 5-hydroxymethylcytosine (5hmC), which they further oxidize into 5-formylcytosine and 5-carboxylcytosine. Tet1 is robustly expressed in mouse embryonic stem cells (mESCs) and has been implicated in mESC maintenance. Here we demonstrate that, unlike genetic deletion, RNAi-mediated depletion of Tet1 in mESCs led to a significant reduction in 5hmC and loss of mESC identity. The differentiation phenotype due to Tet1 depletion positively correlated with the extent of 5hmC loss. Meta-analyses of genomic datasets suggested interaction between Tet1 and leukemia inhibitory factor (LIF) signaling. LIF signaling is known to promote self-renewal and pluripo-tency in mESCs partly by opposing MAPK/ERK mediated differentiation. Withdrawal of LIF leads to differentiation of mESCs. We discovered that Tet1 depletion impaired LIF-dependent Stat3-mediated gene activation by affecting Stat3's ability to bind to its target sites on chromatin. Nanog overexpression or inhibition of MAPK/ERK signaling, both known to maintain mESCs in the absence of LIF, rescued Tet1 depletion, further supporting the dependence of LIF/Stat3 signaling on Tet1. These data support the conclusion that analysis of mESCs in the hours/days immediately following efficient Tet1 depletion reveals Tet1’s normal physiological role in maintaining the pluripotent state that may be subject to homeostatic compensation in genetic models.

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