E-7386 IS NOT A SPECIFIC CBP/β-CATENIN ANTAGONIST
Ontology highlight
ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE221795 | GEO | 2023/12/31
REPOSITORIES: GEO
Similar Datasets
Project description:E-7386 IS NOT A SPECIFIC CBP/β-CATENIN ANTAGONIST
| PRJNA916220 | ENA
Project description:Increasing evidence suggests that cancer arises from cells that are capable of initiating and sustaining neoplastic tissue growth, termed cancer stem cells (CSCs). Of central scientific and clinical relevance, cells with CSC properties are enriched for chemo- and radiation resistance and therefore may represent a population of cells that must be therapeutically targeted to prevent cancer recurrence/relapse 1. Human CSCs were first isolated in neoplastic hematopoietic tissue that manifests leukemias such as adult acute myeloid leukemia (AML) 2. AML stem cells represent a benchmark model of human CSC biology, ultimately motivating foundational studies leading to the identification of CSCs from solid tumours such as breast and colon 3. Independent of tissue type, a consistent feature of CSCs is their uncontrolled self-renewal capacity and differentiation blockade that have been commonly related to aberrant activation of pro-oncogenic events such as dysregulation of CBP/p300 transcriptional regulation involving β-catenin 4. However, the transcriptional networks involving CBP/p300/β-catenin complex have been shown to be equally critical to maintain normal stem cell (SCs) self-renewal for tissue homeostasis and regeneration 5. Here, we identify Sam68 as a distinct target that affords the ability to uniquely regulate CBP mediated transcription in human CSCs. Using a small molecule that targets Sam68, we reveal that shifting its affinity for CBP disrupts CBP/β-catenin complexes, leading to immediate changes in histone H3 (K14 and K18) acetylation. Chemical targeting of Sam68 induced global changes in transcriptional programs of patient AML cells involving apoptosis and differentiation and was able to uniquely reduce neoplastic self-renewal of human CSCs in an in vivo model of patient specific acute myeloid leukemia (AML). Our study establishes an approach whereby the CBP/β-catenin transcriptome can be uniquely targeted via Sam68 based vulnerability of CSCs that impacts neoplastic differentiation and self-renewal.
2017-10-10 | GSE34965 | GEO
Project description:Head and neck squamous cell carcinoma (HNSCC) presents primarily as oral squamous cell carcinoma (OSCC), an aggressive malignancy characterized by heterogeneity, locoregional metastases and resistance to existing treatments. Although a number of molecular alterations associated with OSCC have been identified, they have had limited impact on clinical management. A frequent feature of OSCC is the inappropriate activation of nuclear β-catenin. Here, we provide a comprehensive characterization of the effects of blocking the interaction between nuclear β-catenin and the cAMP-responsive element binding (CREB)-binding protein (CBP) using the small molecule inhibitor ICG-001. We demonstrate that ICG-001 inhibits cell proliferation and aggressive OSCC cell phenotypes in cellular, zebrafish and murine models, and that its inhibition-associated transcriptional signature tracks with advanced tumor grade and poor survival in human patients. Our results suggest that targeting the β-catenin/CBP interaction in the nucleus represents a new and effective therapy for OSCC.
2018-07-03 | GSE95704 | GEO
Project description:To determine the global transcriptomic changes induced by treatment with the Beta Catenin antagonist BC2059 in AML cells The canonical WNT-β-catenin pathway is essential for self-renewal, growth and survival of AML stem/blast progenitor cells (BPCs). Deregulated WNT signaling inhibits degradation of β-catenin, causing increased nuclear translocation and co-factor activity of β-catenin with the transcriptional regulator TCF4/LEF1 in AML BPCs. Here, we determined the pre-clinical anti-AML activity of the anthraquinone oxime-analog BC2059 (BC), known to attenuate β-catenin levels. BC treatment disrupted the binding of β-catenin with the scaffold protein TBL1 (transducin β-like 1) and proteasomal degradation and decline in the nuclear levels of β-catenin. This was associated with reduced transcriptional activity of TCF4 and expression of its target genes, cyclin D1, c-Myc and survivin. BC treatment dose-dependently induced apoptosis of cultured and primary AML BPCs. Treatment with BC also significantly improved the median survival of immune-depleted mice engrafted with either cultured or primary AML BPCs exhibiting nuclear expression of β-catenin. Co-treatment with the pan-histone deacetylase inhibitor panobinostat and BC synergistically induced apoptosis of cultured and primary AML BPCs, including those expressing FLT3-ITD, as well as further significantly improved the survival of immune-depleted mice engrafted with primary AML BPCs. These findings underscore the promising pre-clinical activity and warrant further testing of BC against human AML, especially those expressing FLT3-ITD.
2014-12-31 | GSE61275 | GEO
Project description:Although ERBB2 amplification and overexpression is correlated with poor outcome in breast cancer, the molecular mechanisms underlying the aggressive nature of these tumors has not been fully elucidated. To investigate this further, we have used a transgenic mouse model of ErbB2-driven tumor progression (ErbB2KI model) that recapitulates clinically relevant events, including selective amplification of the core erbB2 amplicon. By comparing the transcriptional profiles of ErbB2KI mammary tumors and human ERBB2-positive breast cancers, we demonstrate that ErbB2KI tumors possess molecular features of the basal subtype of ERBB2-positive human breast cancer, including activation of canonical β-catenin signaling. Inhibition of β-catenin-dependent signaling in ErbB2KI-derived tumor cells using RNA interference impaired tumor initiation and metastasis. Furthermore, treatment of ErbB2KI or human ERBB2-overexpressing tumor cells with a selective β-catenin/CBP inhibitor significantly decreased proliferation and ErbB2 expression. Collectively, our data indicate that ERBB2-mediated breast cancer progression requires β-catenin signaling and can be therapeutically targeted by selective β-catenin/CBP inhibitors. Common reference design. 9 samples (including 2 normal tissue, 2 NIC tumors, and 5 KI tumor tissue samples) replicated twice as dye swaps, generating a total of 18 arrays.
2013-06-02 | E-GEOD-37954 | biostudies-arrayexpress
Project description:In pediatric glioma cell lines, treatment with ICG-001 had no inhibitory effect on canonical Wnt-target genes but induced significant up regulation of various known β-catenin target genes in both cell lines and top 20 GO-annotations of down-regulated genes by ICG-001 were associated with biosynthetic and metabolic processes and cell cycle division processes.
2016-06-14 | GSE83266 | GEO
Project description:Although ERBB2 amplification and overexpression is correlated with poor outcome in breast cancer, the molecular mechanisms underlying the aggressive nature of these tumors has not been fully elucidated. To investigate this further, we have used a transgenic mouse model of ErbB2-driven tumor progression (ErbB2KI model) that recapitulates clinically relevant events, including selective amplification of the core erbB2 amplicon. By comparing the transcriptional profiles of ErbB2KI mammary tumors and human ERBB2-positive breast cancers, we demonstrate that ErbB2KI tumors possess molecular features of the basal subtype of ERBB2-positive human breast cancer, including activation of canonical β-catenin signaling. Inhibition of β-catenin-dependent signaling in ErbB2KI-derived tumor cells using RNA interference impaired tumor initiation and metastasis. Furthermore, treatment of ErbB2KI or human ERBB2-overexpressing tumor cells with a selective β-catenin/CBP inhibitor significantly decreased proliferation and ErbB2 expression. Collectively, our data indicate that ERBB2-mediated breast cancer progression requires β-catenin signaling and can be therapeutically targeted by selective β-catenin/CBP inhibitors.
2013-06-02 | GSE37954 | GEO
Project description:To identify evolutionarily conserved Beta-catenin protein interactions, Beta-catenin mRNA from various metazoans was injected into Xenopus embryos and immunopurified at gastrula stage. Beta-catenin complexes were then separated on an SDS-PAGE gel and subjected mass spectrometric analysis
2023-07-08 | PXD035167 | JPOST Repository
Project description:Interventions: Case series:Nil
Primary outcome(s): Ecadherin, beta catenin, CDX - 2, SOX - 2
Study Design: Non randomized control
| 2692541 | ecrin-mdr-crc
Project description:In pediatric glioma cell lines, treatment with ICG-001 had no inhibitory effect on canonical Wnt-target genes but induced significant up regulation of various known β-catenin target genes in both cell lines and top 20 GO-annotations of down-regulated genes by ICG-001 were associated with biosynthetic and metabolic processes and cell cycle division processes. Pediatric cell lines were treated with ICG-001 or DMSO for 48h
2016-06-14 | E-GEOD-83266 | biostudies-arrayexpress