Expression profiling of BORIS knockout mice testis
Ontology highlight
ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE19162 | GEO | 2010/03/31
SECONDARY ACCESSION(S): PRJNA120723
REPOSITORIES: GEO
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Project description:To identify differentially expressed genes in Boris KO testis, gene expression profilings were performed with NIAID mouse customized arrays. Gene expressions of five biological replicates of Boris KO testis were compared to those of wild type testis. Total RNAs from WT and BORIS KO testes prepared from P14 mice were labelled with Cy5 and Cy3, respectively. Five sets of each genotype were studied.
2010-06-05 | E-GEOD-19162 | biostudies-arrayexpress
Project description:The study involved chromatin IP analyzed by high-throughput sequencing analysis using purifird germ cells from M. fascucularis testis M. fascicularis is a monkey with non-seasonal male germ cells production, and the most popular primate for preclinical animal studies. The goal of the study was to investigate the epigenome of M. fscicularis testis with respect to mei-Cohesin complexes, CTCF and BORIS
2022-09-30 | GSE118006 | GEO
Project description:The identification of prognostic biomarkers is a priority for patients suffering from high-grade serous ovarian cancer (SOC), which accounts for >70% of ovarian cancer (OC) deaths. Meanwhile borderline ovarian cancer (BOC) is a low malignancy tumor and usually patients undergo surgery with low probabilities of recurrence. However, SOC remains the most lethal neoplasm due to the lack of biomarkers for early diagnosis and prognosis. In this regard BORIS (CTCFL), a CTCF paralog, is a promising cancer biomarker that is overexpressed and controls transcription in several cancer types, mainly in OC. Studies suggest that BORIS has an important function in OC by altering gene expression, but the effect and extent to which BORIS influences transcription in OC from a genome-wide perspective is unclear. Here we sought to identify BORIS target genes in an OC cell line (OVCAR3) with potential biomarker use in OC tumor samples. To achieve this, we performed in vitro knockout (KO) and knockdown (KD) experiments of BORIS in OVCAR3 cell line followed by expression microarrays and bioinformatics network enrichment analysis to identify relevant BORIS target genes.
2019-07-31 | GSE130163 | GEO
Project description:CTCF is a key organizer of the 3D genome. Its specialized paralog, BORIS, heterodimerizes with CTCF but is expressed only in male germ cells and in cancer states. Unexpectedly, BORIS-null mice have only minimal germ cell defects. To understand the CTCF-BORIS relationship, mouse models with varied CTCF and BORIS levels were generated. Whereas Ctcf+/+Boris+/+, Ctcf+/-Boris+/+, and Ctcf+/+Boris-/- males are fertile, Ctcf+/-Boris-/- (Compound Mutant; CM) males are sterile. Testes with combined depletion of both CTCF and BORIS show reduced size, defective meiotic recombination, increased apoptosis, and malformed spermatozoa. Although CM germ cells exhibit only 25% of CTCF WT expression, chromatin binding of CTCF is preferentially lost from CTCF-BORIS heterodimeric sites. Furthermore, CM testes lose the expression of a large number of spermatogenesis genes and gain the expression of developmentally inappropriate genes that are “toxic” to fertility. Thus, a combined action of CTCF and BORIS is required to both repress pre-meiotic genes and activate post-meiotic genes for a complete spermatogenesis program.
2021-04-22 | GSE154249 | GEO
Project description:Pervasive usage of alternative promoters leads to deregulation of gene expression in carcinogenesis and may drive the emergence of new genes in spermatogenesis. However, little is known regarding the mechanisms underpinning the activation of alternative promoters. In our present study, we uncovered a novel mechanism by which alternative cancer-testis-specific transcription is activated from the intergenic and intronic clustered CTCF binding sites, which are transcriptionally inert in normal somatic cells. BORIS/CTCFL, a paralog of CTCF with cancer-testis-specific expression forms a heterodimer with CTCF at the clustered binding sites thus triggering epigenetic reprogramming of these sites into units of active transcription. BORIS binding to CTCF sites leads to the recruitment of chromatin-remodeling factor SRCAP, with subsequent replacement of H2A histone with H2A.Z, therefore creating a more relaxed chromatin state in the nucleosomes flanking the clustered binding sites. This facilitates opening of chromatin beyond CTCF/BORIS binding sites and paves the way to the recruitment of multiple additional transcription factors, thereby activating transcription from a given binding site. We demonstrate that the CTCF binding sites, epigenetically reprogrammed by ectopic BORIS expression can drive the expression of cancer-testis genes, long-noncoding RNAs, retro-pseudogenes, and dormant transposable elements harbored by activated long transcripts. Taking together, our results reveal that BORIS functions as a transcription factor that epigenetically reprograms clustered CTCF binding sites into transcriptional start sites, promoting transcription from alternative promoters in both germ cells and cancer cells.
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Project description:BORIS expresses abnormally in colorectal cancer cells. Both the expression and the copy number of BORIS are remarkably higher in colorectal cancer cells than in normal colon or rectal cells. BORIS is potential diagnosis, prognosis or therapeutic target for colorectal cancer. To expand our view of the signaling pathway related with BORIS, altered gene expression by BORIS knockdown was assessed by microarray assay. To study the gene regulation by BORIS knockdown, microarray assay was applied to screen the gene expression regulated by BORIS siRNA in colorectal cancer cells HCT116 and Caco-2
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Project description:This study compares the transcripts bound to BORIS in neural progenitor cells and cells differentiated for 6 days into young neurons We present expression profiles for neural progenitor cells (arrays hybridised in triplicate) and in young neurons (arrays hybridised in duplicate). Immunoprecipitated BORIS-mRNA complexes were used to assess the association of BORIS with target mRNAs in neural progenitor cells and in young neurons (both arrays hybridised in duplicate).
2013-11-29 | E-GEOD-42294 | biostudies-arrayexpress
Project description:CTCF and BORIS (CTCFL), two paralogous mammalian proteins sharing nearly identical DNA binding domains, are thought to function in mutually exclusive manners in DNA binding and transcriptional regulation. Here we show that these two proteins co-occupy a specific subset of regulatory elements consisting of clustered CTCF binding motifs (termed 2xCTSes). BORIS occupancy at 2xCTSes is largely invariant in BORIS-positive cancer cells, with the genomic pattern recapitulating the germline-specific BORIS binding to chromatin. In contrast to the single-motif CTCF target sites (1xCTSes), the 2xCTS elements are preferentially found at active promoters and enhancers, both in cancer and germ cells. 2xCTSes are also enriched in genomic regions that escape histone to protamine replacement in human and mouse sperm. Depletion of BORIS gene leads to altered transcription of a large number of genes and the differentiation of K562 cells, while the ectopic expression of this CTCF paralog leads to specific changes in transcription in MCF7 cells. In summary, we discover two functionally and structurally different classes of CTCF binding regions, 2xCTSes and 1xCTSes, revealed by their predisposition to bind BORIS. We propose that 2xCTSes play key roles in the transcriptional program of cancer and germ cells Genome-wide mapping of CTCF and BORIS occupancies in both germ and cancer cells. ChIP-seq and expression profiling by high throughput sequencing
2015-07-23 | E-GEOD-70764 | biostudies-arrayexpress
Project description:Transcriptome analysis of BORIS depleted MCF7 cells To delineate the alternative pre-mRNA splicing program mediated by BORIS in breast cancer cells, BORIS was depleted in MCF7 using shRNA, and the resultant changes in alternative pre-mRNA splicing and mRNA expression pattern was profiled using Affymetrix Human Transcriptome 2.0 Array
2017-09-25 | GSE81001 | GEO
Project description:The combined action of CTCF and its testis-specific paralog BORIS is essential for spermatogenesis
| PRJNA645574 | ENA