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BET protein-dependent E2F pathway confers bell-shaped type resistance to tankyrase inhibitors in APC-mutated colorectal cancer [CUT&RUN]

ABSTRACT: In colorectal cancer (CRC), WNT/β-catenin signaling is aberrantly activated mainly by loss-of-function mutations in adenomatous polyposis coli (APC) and is involved in tumor progression. Tankyrase inhibitors, which suppress WNT/β-catenin signaling, are under pre-clinical and clinical trials, while their resistance mechanisms remain unclear. In this study, we established tankyrase inhibitor-resistant CRC cells, JC73-RK100, from APC-mutated patient-derived CRC cells. JC73-RK100 cells and several CRC cells were sensitive to tankyrase inhibitors at low concentrations but were resistant at high concentrations (i.e., bell-shaped dose response: BSDR). Mechanistically, tankyrase inhibitors at high concentrations promoted BRD3/4-dependent E2F target gene transcription and over-activated cell cycle progression in the BSDR cells. BET inhibitors canceled the bell-shaped dose response to tankyrase inhibitors. Taken together, these observations suggest that combination of tankyrase and BET inhibitors would be a useful therapeutic approach to overcome a subset of resistance to tankyrase inhibitors.

ORGANISM(S): Homo sapiens

PROVIDER: GSE239680 | GEO | 2024/07/29

REPOSITORIES: GEO

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BET protein-dependent E2F pathway confers bell-shaped type resistance to tankyrase inhibitors in APC-mutated colorectal cancer [RNA-seq]

Project description:In colorectal cancer (CRC), WNT/β-catenin signaling is aberrantly activated mainly by loss-of-function mutations in adenomatous polyposis coli (APC) and is involved in tumor progression. Tankyrase inhibitors, which suppress WNT/β-catenin signaling, are under pre-clinical and clinical trials, while their resistance mechanisms remain unclear. In this study, we established tankyrase inhibitor-resistant CRC cells, JC73-RK100, from APC-mutated patient-derived CRC cells. JC73-RK100 cells and several CRC cells were sensitive to tankyrase inhibitors at low concentrations but were resistant at high concentrations (i.e., bell-shaped dose response: BSDR). Mechanistically, tankyrase inhibitors at high concentrations promoted BRD3/4-dependent E2F target gene transcription and over-activated cell cycle progression in the BSDR cells. BET inhibitors canceled the bell-shaped dose response to tankyrase inhibitors. Taken together, these observations suggest that combination of tankyrase and BET inhibitors would be a useful therapeutic approach to overcome a subset of resistance to tankyrase inhibitors.

2024-07-29 | GSE239681 | GEO

Expression data of colon cancer COLO320DM cells and tankyrase inhibitor-resistant variant 320-IWR cells

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Project description:Tankyrase, a poly(ADP-ribose) polymerase family member, regulates multiple cellular processes. Tankyrase inhibitors efficiently suppress APC-mutated colorectal cancer (CRC) cell proliferation. To examine the mechanism of anti-proliferative effect of tankyrase inhibitors (G007LK and RK582), we analyzed gene expression profiles of patient-derived APC-mutated CRC cells (JC21 and JC475) left untreated or treated with 0.3 µM G007LK or RK582 for 24 h by cDNA microarray analysis.

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2017-11-09 | PXD007947 | Pride

BET protein-dependent E2F pathway confers bell-shaped type resistance to tankyrase inhibitors in APC-mutated colorectal cancer

Project description:BET protein-dependent E2F pathway confers bell-shaped type resistance to tankyrase inhibitors in APC-mutated colorectal cancer

| PRJNA1000553 | ENA

BET protein-dependent E2F pathway confers bell-shaped type resistance to tankyrase inhibitors in APC-mutated colorectal cancer [CUT&RUN]

Project description:BET protein-dependent E2F pathway confers bell-shaped type resistance to tankyrase inhibitors in APC-mutated colorectal cancer [CUT&RUN]

| PRJNA1000550 | ENA

BET protein-dependent E2F pathway confers bell-shaped type resistance to tankyrase inhibitors in APC-mutated colorectal cancer [RNA-seq]

Project description:BET protein-dependent E2F pathway confers bell-shaped type resistance to tankyrase inhibitors in APC-mutated colorectal cancer [RNA-seq]

| PRJNA1000562 | ENA

Tankyrase inhibitors target colorectal cancer stem cells via AXIN-dependent downregulation of c-KIT tyrosine kinase

Project description:Tankyrase, a poly(ADP-ribose) polymerase family member, destabilizes Axin and positively regulates the Wnt/β-catenin signaling. We demonstrated that tankyrase inhibitors can target the colorectal cancer stem-like cells. Tankyrase inhibitors efficiently suppress colorectal cancer stem-like cell proliferation via AXIN-dependent manner. We sorted CD44-positive COLO-320DM cells, which showed a characteristic of CSCs and were targeted by tankyrase inhibitors. We analyzed gene expression profile of CD44-positive cells (CD44-positive 01, 02, 03) and CD44-negative cells (CD44-negative 01, 02, 03).

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Stabilisation of b-Catenin-WNT signalling by USP10 in APC-truncated colorectal cancer drives cancer stemness and enables super-competitor signalling

Project description:The contribution of deubiquitylating enzymes to b-Catenin stabilisation in intestinal stem cells and colorectal cancer (CRC) is poorly understood. Here, we report the deubiquitylase USP10 as APC-truncation- specific regulator enhancer of b-Catenin stability, potentiating WNT signalling pathway in CRC and cancer stem cells. Mechanistically, interaction studies in various CRC cell lines and in vitro binding studies, together with computational modelling, revealed that USP10 binding to b-Catenin is mediated via its USP10 unstructured N-terminus and requires truncated in the absence of full-length APC. Notably, loss of USP10 in CRISPR engineered intestinal organoids reduces tumorigenic properties of CRC cells and organoids, and blocks the super competitor-properties of APC-mutated intestinal cells, elicits induces the expression of differentiation genes, and opposes the APC-truncated phenotype in an intestinal hyperplasia model of D.melanogaster. Taken together, our findings reveal USP10s role in intestinal tumourigenesis by stabilising b-Catenin, leading to aberrant WNT signalling, enhancing cancer cell stemness and implicate the DUB USP10 as a cancer specific therapeutic vulnerability in Apc truncated CRC.

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