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Ectopic expression of AP4 in human colorectal cancer cells DLD-1 for different times

ABSTRACT: To characterize the transcriptome of the transcription factor AP4 DLD-1 cells were infected with AP4 coding viruses for different periods of time. Adenovirus amplification and purification was performed as previously described (He et al., 1998). The minimal amount of virus needed to reach more than 90% infection efficiency was determined by monitoring GFP signals with fluorescence microscopy. DLD-1 cells were infected in serum-free medium with adenovirus for 3 hours. After removal an equal amount of medium containing 20% FBS was added.

ORGANISM(S): Homo sapiens

PROVIDER: GSE46578 | GEO | 2013/05/31

SECONDARY ACCESSION(S): PRJNA205059

REPOSITORIES: GEO

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Ectopic expression of AP4 in human colorectal cancer cells DLD-1 for different times

Project description:To characterize the transcriptome of the transcription factor AP4 DLD-1 cells were infected with AP4 coding viruses for different periods of time. Adenovirus amplification and purification was performed as previously described (He et al., 1998). The minimal amount of virus needed to reach more than 90% infection efficiency was determined by monitoring GFP signals with fluorescence microscopy. DLD-1 cells were infected in serum-free medium with adenovirus for 3 hours. After removal an equal amount of medium containing 20% FBS was added. This study contains 17 Samples with different conditions/samples: Triplicates of non-infected cells as a control, triplicates of infections with an AP4 coding viruses harvested after 12, 24 and 48 hours and, as an additional control, a triplicate of cells infected with a GFP expressing virus harvested after 24 hours and unicates harvested after 12 and 48 hours.

2013-05-31 | E-GEOD-46578 | biostudies-arrayexpress

ChIP-seq of AP4 binding in human colorectal cancer cells DLD-1.

Project description:In order to comprehensively identify genes directly regulated by AP4, a genome-wide chromatin-immunoprecipitation analysis (ChIP) followed by next generation sequencing (ChIP-seq) was performed after activation of a conditional AP4 allele in DLD-1 cells. One DLD-1 Sample was sequenced.

2013-05-31 | E-GEOD-46935 | biostudies-arrayexpress

ChIP-seq of AP4 binding in human colorectal cancer cells DLD-1.

2013-05-31 | GSE46935 | GEO

Altered expression of genes in AP4 knockdown and overexpression

Project description:The transcription factor AP4/TFAP4/AP-4 is a ubiquitously expressed basic helix-loop-helix leucine-zipper (bHLH-LZ) transcription factor, which forms homodimer that binds to the consensus E-box motif 5-CAGCTG-3. Prostatic adenocarcinoma (PAC), also known as prostate cancer, is the second most common malignancy of men with 914,000 new cases and approximately 258,000 deaths worldwide in 2008. The goal of this study is to identify the target genes of AP4 in prostate cancer. Our results demonstrated that the genes regulated by AP4 are involved in a variety of biological functions, such as proliferation and invasion. We used microarrays to detail the different expression of genes in AP4 knockdown and overexpression and identified distinct classes of up-regulated genes during this process.

2016-06-09 | GSE83140 | GEO

AP4 regulates stem and Paneth cell homeostasis and promotes adenoma initiation in the intestine (adenoma)

Project description:AP4 is frequently expressed in primary CRCs. However, the in vivo relevance of AP4 for development of intestinal tumor formation has not been analyzed by genetic approaches. ApcMin/+ mice with deletion of AP4 were generated and analyzed. The mRNA expression profiles of intestinal adenomas with and without functional AP4 were compared.

2018-12-25 | GSE99437 | GEO

Sphingomonas sp. AP4-R1

Project description:Sphingomonas sp. AP4-R1 Genome sequencing

| PRJNA631068 | ENA

AP4 regulates stem and Paneth cell homeostasis and promotes adenoma initiation in the intestine (small intestinal organoid)

2018-12-25 | GSE99434 | GEO

Gene expression analysis of cMyc-deficient CD8 T cells retrovirally overexpressing cMyc or AP4

Project description:To determine functional overlap between cMyc and AP4 in CD8+ T cell priming, we retrovirally expressed cMyc or AP4 in cMyc-deficient CD8+ T cells and examined gene expression after activation.

2014-07-13 | GSE58079 | GEO

HMGA2-driven gene expression in human colorectal DLD-1 cells.

Project description:Gene expression analysis of stable HMGA2-overexpressing DLD-1 cells (DLD-1-HMGA2) and its control cells (DLD-1-Vector).

2019-08-29 | GSE136544 | GEO

Defining AP4- and MYC-regulated gene expression programs in germinal center B cells during cyclic re-entry

Project description:B cells diversify and affinity-mature their antigen receptor repertoire in germinal centers (GC). GC B cells receive help signals during transient interaction with T cells, yet it remains unknown how these transient T-B interactions sustain the subsequent proliferative program of selected B cells. Here we show that the transcription factor AP4 is required for sustained GC B cell proliferation and subsequent establishment of a diverse and protective antibody repertoire. AP4 is induced by c-MYC during the T-B interactions and maintained by T cell-derived IL-21. B cell-specific deletion of AP4 resulted in reduced GC sizes and somatic hypermutation and a failure to control chronic viral infection. These results indicate that AP4 integrates T cell-mediated selection and sustained expansion of GC B cells for humoral immunity. Splenic B cells activated with anti-IgM and CD40L in vitro and germinal center B cells sorted from C57BL/6 mice eight days after immunization with sheep red blood cells (SRBCs) were obtained and genome-wide occupancy of c-MYC, AP4 and active histone marks was profiled by chromatin immunoprecipitation and high-throughput sequencing. Gene expression in MYCâAP4â LZ, MYC+AP4+ LZ, AP4+ DZ, and APâ DZ GC B cells from SRBC-immunized AP4-mCherry / c-MYC-GFP dual reporter mice was profiled by RNA-seq.

2016-08-23 | E-GEOD-80669 | biostudies-arrayexpress

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