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Transcriptional response induced by knockdown of HUWE1 in human HEK293T cells

ABSTRACT: siHUWE1-downregulated proteins have higher-than-average insolubility, suggesting that HUWE1 stabilizes proteins with high insolubility

ORGANISM(S): Homo sapiens

PROVIDER: GSE247514 | GEO | 2025/08/01

REPOSITORIES: GEO

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Tumor cell-specific inhibition of MYC function using small molecule inhibitors of the HUWE1 ubiquitin ligase

Project description:Deregulated expression of MYC is a driver of colorectal carcinogenesis, necessitating novel strategies to inhibit MYC function. The ubiquitin ligase HUWE1 (HECTH9, ARFBP1, MULE) associates with both MYC and the MYC-associated protein MIZ1. We show here that HUWE1 is required for growth of colorectal cancer cells in culture and in orthotopic xenograft models. Using high throughput screening, we identify small molecule inhibitors of HUWE1, which inhibit MYC-dependent transactivation in colorectal cancer cells, but not in stem and normal colon epithelial cells. Inhibition of HUWE1 stabilizes MIZ1. MIZ1 globally accumulates on MYC target genes and contributes to repression of MYC-activated target genes upon HUWE1 inhibition. Our data show that transcriptional activation by MYC in colon cancer cells requires the continuous degradation of MIZ1 and identify a novel principle that allows for inhibition of MYC function in tumor cells. MIZ1 and MYC ChIPseq experiments in HUWE1 inhibitor-treated Ls174T cells as well as RNAseq experiments in HUWE1- or MIZ1-depleted Ls174T cells after HUWE1 inhibitor treatment. Sequencing was performed on an Illumina Genome Analyzer IIx.

2014-10-21 | E-GEOD-59223 | biostudies-arrayexpress

Tumor cell-specific inhibition of MYC function using small molecule inhibitors of the HUWE1 ubiquitin ligase

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Transcriptional response induced by knockdown of HUWE1 in human HEK293T cells

Project description:Transcriptional response induced by knockdown of HUWE1 in human HEK293T cells

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Tumor cell-specific inhibition of MYC function using small molecule inhibitors of the HUWE1 ubiquitin ligase

Project description:HUWE1 was depleted in Ls174T cells with an shRNA and the expression changes relative to a control shRNA were analyzed with microarray. Ls174T cells were treated with two separate HUWE1 inhibitor compounds (BI8622/BI8626) at concentrations of 20 uM and expression profiles relative to DMSO treated control were monitored via microarray. HUWE1-depleted Ls174T cells were treated with BI8622 (20uM) and expression profiles relative to BI8622-treated non-depleted cells were analyzed.

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The ubiquitin ligase HUWE1 regulates hematopoietic stem cell maintenance and lymphoid commitment [microarray]

Project description:We identified the ubiquitin ligase Huwe1 as a crucial regulator of hematopoietic stem cell (HSC) functions. We generated Huwe1 conditional knock-out mice and discovered that the loss of this ligase causes an increased proliferation and stem cell exhaustion, together with a decreased lymphoid specification in vivo. We observed that the ubiquitin ligase Huwe1 is controlling the expression of N-myc at the level of the most immature stem and progenitor hematopoietic populations, mediating the described effects. Hematopoietic stem cells (HSC) from the bone marrow of transgenic animals carrying a N-myc/mCherry fusion gene were sorted according to N-myc expression (defined by mCherry) into N-myc high and low subpopulations. Each of these 2 populations was subjected to microarray gene expression profiling.

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The ubiquitin ligase HUWE1 regulates hematopoietic stem cell maintenance and lymphoid commitment [microarray]

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Regulation of the cardiac transcriptome by the E3 ubiquitin ligase Huwe1.

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Huwe1 supports B-cell development, B-cell-dependent immunity, somatic hypermutation and class switch recombination by regulating proliferation

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