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DBET57 exerts anti-cancer effects in neuroblastoma

ABSTRACT: Neuroblastoma (NB) is the most common extracranial solid tumor of childhood, which is derived from primordial neural crest cells. dBET57, a new cereblon (CRBN) based inhibitor developed by PROTAC technology. It binds to the BET protein families BRD2, BRD3, and BRD4, which are recruited to the proteasome system for selective ubiquitination degradation. However, the function of dBET57 has not been assessed in NB models so far. In the present study, RNA-seq analysis was performed to explore the effect of dBET57 on NB cells.

ORGANISM(S): Homo sapiens

PROVIDER: GSE208184 | GEO | 2022/12/09

REPOSITORIES: GEO

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BRD4 inhibitor GNE987 exerts anti-cancer effects in Neuroblastoma

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2022-03-23 | GSE190002 | GEO

BRD4 inhibitor GNE987 exerts anti-cancer effects in Neuroblastoma (ChIP-Seq)

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BRD4 inhibitor MZ1 exerts anti-cancer effects in Neuroblastoma

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2022-05-15 | GSE195729 | GEO

Discovery of a dual PROTAC for degrading WDR5 and Ikaros oncoproteins as therapeutics [RNA-Seq]

Project description:WD repeat domain 5 (WDR5), a chromatin regulator associated with MLL complex and MYC oncoproteins, was shown to be critical for oncogenesis in human cancers and represents an attractive drug target. Inhibitors for targeting protein-protein interaction interfaces (PPIs) within WDR5 were developed; however, they inhibited only a part of WDR5-mediated functional interactions, exerting rather limited antitumor effects. We report a cereblon (CRBN)-based proteolysis targeting chimera (PROTAC) of WDR5, MS40, which is capable of selectively degrading cellular WDR5 and well-established imide:CRBN targets such as Ikaros (IKZF1). MS40-induced WDR5 degradation caused disassociation of MLL complex off chromatin, resulting in a decrease of global H3K4me2. Transcriptomic profiling also revealed targets of both WDR5 and imide:CRBN to be repressed by MS40. In MLL-rearranged acute leukemias, which exhibit high IKZF1 expression and IKZF1 dependency, co-suppression of WDR5 and IKZF1/3 by MS40 is superior at suppressing tumor growth not only to WDR5 PPI inhibitors but also to a VHL-based WDR5 PROTAC, MS169, which selectively targets WDR5 only. Furthermore, MS40 suppressed growth of primary leukemia patient cells in vitro and patient-derived xenografts (PDX) in vivo. Collectively, we report the discovery of a dual WDR5 and Ikaros degrader as anti-cancer therapeutic.

2022-05-15 | GSE175547 | GEO

Discovery of a dual PROTAC for degrading WDR5 and Ikaros oncoproteins as therapeutics [ChIP-Seq]

Project description:WD repeat domain 5 (WDR5), a chromatin regulator associated with MLL complex and MYC oncoproteins, was shown to be critical for oncogenesis in human cancers and represents an attractive drug target. Inhibitors for targeting protein-protein interaction interfaces (PPIs) within WDR5 were developed; however, they inhibited only a part of WDR5-mediated functional interactions, exerting rather limited antitumor effects. We report a cereblon (CRBN)-based proteolysis targeting chimera (PROTAC) of WDR5, MS40, which is capable of selectively degrading cellular WDR5 and well-established imide:CRBN targets such as Ikaros (IKZF1). MS40-induced WDR5 degradation caused disassociation of MLL complex off chromatin, resulting in a decrease of global H3K4me2. Transcriptomic profiling also revealed targets of both WDR5 and imide:CRBN to be repressed by MS40. In MLL-rearranged acute leukemias, which exhibit high IKZF1 expression and IKZF1 dependency, co-suppression of WDR5 and IKZF1/3 by MS40 is superior at suppressing tumor growth not only to WDR5 PPI inhibitors but also to a VHL-based WDR5 PROTAC, MS169, which selectively targets WDR5 only. Furthermore, MS40 suppressed growth of primary leukemia patient cells in vitro and patient-derived xenografts (PDX) in vivo. Collectively, we report the discovery of a dual WDR5 and Ikaros degrader as anti-cancer therapeutic.

2022-05-15 | GSE175544 | GEO

Cereblon expression is required for the anti-myeloma activity of lenalidomide and pomalidomide [expression profiling]

Project description:The precise molecular mechanism of action and targets through which thalidomide and related immunomodulatory drugs (IMiDs) exert their anti-tumor effects remains unclear. We investigated the role of cereblon (CRBN), a primary teratogenic target of thalidomide, in the anti-myeloma activity of IMiDs. CRBN depletion is initially cytotoxic to human myeloma cells but surviving cells with stable CRBN depletion become highly resistant to both lenalidomide and pomalidomide, but not to the unrelated drugs bortezomib, dexamethasone and melphalan. Acquired deletion of CRBN was found to be the primary genetic event differentiating isogenic MM1.S cell lines cultured to be sensitive or resistant to lenalidomide and pomalidomide. Gene expression changes induced by lenalidomide were dramatically suppressed in the presence of CRBN depletion further demonstrating that CRBN is required for lenalidomide activity. Downstream targets of CRBN include interferon regulatory factor 4 (IRF4) previously reported to also be a target of lenalidomide. Patients exposed to and putatively resistant to lenalidomide had lower CRBN levels in paired samples before and after therapy. In summary, CRBN is an essential requirement for IMiD activity, and a possible biomarker for the clinical assessment of anti-myeloma efficacy. We included 15 samples from multiple myeloma cell lines.

2011-09-30 | E-GEOD-31421 | biostudies-arrayexpress

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