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Sirt1, p53 and p38MAPK are crucial regulators of detrimental phenotypes of ESCs with Max expression ablation

ABSTRACT: Ablation of expression of the Max gene encoding a Myc protein partner in ES cells provoked two major phenomena, i.e. loss of pluripotency and apoptotic cell death. We found that nicotinamide (Nam) significantly alleviates these Max expression ablation-coupled phenotypes in ES cells. To see the alleviation effect of Nam on the overall expression profile of Max-null ES cells whose Max expression is controlled by the tet-off system, we eliminated Max expression by adding doxycycline (Dox) in the presence of Nam.

ORGANISM(S): Mus musculus

PROVIDER: GSE37917 | GEO | 2012/08/28

SECONDARY ACCESSION(S): PRJNA165155

REPOSITORIES: GEO

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Sirt1, p53 and p38MAPK are crucial regulators of detrimental phenotypes of ESCs with Max expression ablation

Project description:Ablation of expression of the Max gene encoding a Myc protein partner in ES cells provoked two major phenomena, i.e. loss of pluripotency and apoptotic cell death. We found that nicotinamide (Nam) significantly alleviates these Max expression ablation-coupled phenotypes in ES cells. To see the alleviation effect of Nam on the overall expression profile of Max-null ES cells whose Max expression is controlled by the tet-off system, we eliminated Max expression by adding doxycycline (Dox) in the presence of Nam. DNA microarray analyses were performed using total RNAs from Nam (4 mM)-treated Max-null ES cells that were cultured in the presence or absence of doxycycline for 6 days.

2012-08-28 | E-GEOD-37917 | biostudies-arrayexpress

Max as a biological blockade that restricts meiotic process in ESCs

Project description:We explored Max ablation-mediated up-regulation of germ-related genes, especially meiosis-related genes in mouse embryonic stem cells which were cultured either under conventional mouse ES medium or 2i condition using inhibitors against MEK and GSK3b. Effect of culture conditions (conventional mouse ES medium or 2i condition) on the expression profile of germ-related genes in Max expression ablated ES cells were examined using inducible Max-null ES cells in which Max gene had been homozygously disrupted, but carries Max cDNA in ROSA26 locus with tetracycline-off system.

2016-03-31 | E-GEOD-65700 | biostudies-arrayexpress

Effect of ablation of Max gene expression on ES cells cultured under conventional or 2i/Nam condition.

Project description:c-Myc is one of key players that are crucially involved in maintaining the undifferentiated state and the self-renewal of ESCs. To understand the mechanism by which c-Myc helps preserve these prominent characteristics of ESCs, we generated null-ES cells for the Max gene, which encodes the best characterized partner protein for all Myc family proteins. Although Myc/Max complexes have been widely regarded as crucial regulators of the ESC status, our data reveal that ESCs do not absolutely require these complexes in so-called ground state or related conditons and that this requirement is restricted to conventional ES culture conditions without using a MAPK inhibitor. Simply Dox-treated or Nanog (WT or D67G mutant)-rescued Max-null ESCs which were cultured under conventional culture condition and 2i/Nam-treated completely Max-null ES cells from which Dox-regulatable cDNA was removed were used for RNA source. Samples from Dox-untreated Max-null ESCs cultured under conventional culture condition were used as reference samples for Dox-treated cells and Nanog-rescued cells, while a sample from wild-type ESCs cultured under 2i/Nam condition was used as a reference sample for completely Max-null ES cells cultured with 2i/Nam.

2011-07-19 | E-GEOD-27881 | biostudies-arrayexpress

Max as a biological blockade that restricts meiotic process in ESCs

2016-03-31 | GSE65700 | GEO

Identification of MAX signature on MAX deficient SCLC cell lines

Project description:To development our gene expression approach, we have employed whole genome microarray expression profiling as a discovery platform to identify genes potentialy regulated by the transcription factor MAX.Human SCLC cell lines waere analyzed for mutations at the MAX locus. Those cell lines that were found mutated in MAX and showed no MAX protein expression were used as a models to restore the expression of MAX transcription factor, and Identify MAX signature on Human SCLC.

2013-12-28 | GSE48559 | GEO

Mus musculus

Project description:Effect of ablation of Max gene expression on ES cells cultured under conventional or 2i/Nam condition.

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Genomic occupancy of MAX and members of the MYC network in MAX WT and MAX null preSCs (polyclonal population)

Project description:Conventional crosslinked ChIP was performed on sgCtrl (control guide RNA) and sgMax (guide RNA against Max) transduced preSCs (early stage SCLC line). We find that loss of MAX leads to decreased MAX, MYC and MNT occupancy.

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Effect of ablation of Max gene expression on ES cells cultured under conventional or 2i/Nam condition.

2011-07-20 | GSE27881 | GEO

Glycine max strain:ES Director

Project description:Glycine max strain:ES Director Transcriptome or Gene expression

| PRJNA778970 | ENA

CUT&RUN comparing the occupancy of MAX, MNT, MGA, MYC and RNA pol II Ser5 in a MAX null vs MAX reconstituted mouse SCLC line (mRPMaxKO)

Project description:The goal of this study was to compare the genomic occupancy of MAX, MNT, MGA and RNA pol II Ser5 in MAX restored versus MAX null SCLC (mRPMaxKO)

2020-06-06 | GSE146388 | GEO

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