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

ABSTRACT: 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.

ORGANISM(S): Homo_sapiens

SUBMITTER: Stefanie Peter 

PROVIDER: E-MTAB-1890 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Deregulated expression of MYC is a driver of colorectal carcinogenesis, necessitating novel strategies to inhibit MYC function. The ubiquitin ligase HUWE1 (HECTH9, ARF-BP1, 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  ...[more]

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