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Inhibition of YTHDF2 triggers proteotoxic cell death in MYC-driven breast cancer

ABSTRACT: Inhibition of YTHDF2 triggers proteotoxic cell death in MYC-driven breast cancer

PROVIDER: PRJNA564948 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR10098214.fastq.gz	Fastqsanger.gz
	SRR10098215.fastq.gz	Fastqsanger.gz
	SRR10098216.fastq.gz	Fastqsanger.gz
	SRR10098217.fastq.gz	Fastqsanger.gz
	SRR10098218.fastq.gz	Fastqsanger.gz

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Inhibition of YTHDF2 triggers proteotoxic cell death in MYC-driven breast cancer

Project description:We found in this study through targeted CRISPR-Cas9 screening of RBPs that disrupting YTHDF2-dependent degradation of its target transcripts triggers apoptosis of MYC-dependent cancer cells and tumors. Enhanced CLIP (eCLIP), m6A-sequencing (m6A-seq) and YTHDF2 knockdown followed by RNA-seq analysis of YTHDF2-m6A-mRNA interactions revealed extensive associations with mRNAs encoding MAPK pathway genes that when stabilized, induce epithelial-to-mesenchymal transition and stress-induced apoptosis. scRibo-STAMP profiling of translating mRNAs revealed global alterations in the translatome of single cells in YTHDF2-depleted solid tumors. Thus, our work highlights the therapeutic relevance of RBPs by uncovering the critical role of YTHDF2 in counteracting the global increase of mRNA synthesis in MYC-driven cancers.

2021-07-02 | GSE137258 | GEO

Inhibition of YTHDF2 triggers proteotoxic cell death in MYC-driven breast cancer.

Project description:RNA-binding proteins (RBPs) are critical regulators of post-transcriptional gene expression, and aberrant RBP-RNA interactions can promote cancer progression. Here, we interrogate the function of RBPs in cancer using pooled CRISPR-Cas9 screening and identify 57 RBP candidates with distinct roles in supporting MYC-driven oncogenic pathways. We find that disrupting YTHDF2-dependent mRNA degradation triggers apoptosis in triple-negative breast cancer (TNBC) cells and tumors. eCLIP and m6A sequencing reveal that YTHDF2 interacts with mRNAs encoding proteins in the MAPK pathway that, when stabilized, induce epithelial-to-mesenchymal transition and increase global translation rates. scRibo-STAMP profiling of translating mRNAs reveals unique alterations in the translatome of single cells within YTHDF2-depleted solid tumors, which selectively contribute to endoplasmic reticulum stress-induced apoptosis in TNBC cells. Thus, our work highlights the therapeutic potential of RBPs by uncovering a critical role for YTHDF2 in counteracting the global increase of mRNA synthesis in MYC-driven breast cancers.

| S-EPMC8359670 | biostudies-literature

YTHDF2 iCLIP in glioblastoma stem cells

Project description:Glioblastoma is a universally lethal cancer driven by glioblastoma stem cells (GSCs). Here, we interrogated N6-methyladenosine (m6A) mRNA modifications in GSCs by methyl RNA-immunoprecipitation followed by sequencing (meRIP-seq) and transcriptome analysis, finding transcripts marked by m6A often upregulated. Interrogating m6A regulators, GSCs displayed preferential expression as well as in vitro and in vivo dependency of the m6A reader, YTHDF2, in contrast to normal neural stem cells (NSCs). While YTHDF2 has been reported to destabilize mRNAs, YTHDF2 stabilized the oncogene transcripts, MYC and VEGFA, in GSCs in an m6A-dependent manner. We identified IGFBP3 as a downstream effector of the YTHDF2-MYC axis in GSCs and IGF1/IGF1R inhibitor, Linsitinib, as preferentially targeting YTHDF2-expressing cells, inhibiting the viability of GSCs without affecting NSCs and impairing in vivo glioblastoma growth. Thus, YTHDF2 links RNA epitranscriptomic modifications and GSC growth, laying the foundation for the YTHDF2-MYC-IGFBP3 axis as a specific and novel therapeutic target in glioblastoma.

2020-09-29 | GSE158020 | GEO

Saikosaponin‑D triggers cancer death by targeting the PIM1/c-Myc axis to rewire oncogenic alternative splicing

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Microarray profiling of YTHDF2 deficient mouse oocytes

Project description:To study the role of the protein YTHDF2 during female gametogenesis, its gene was conditionally deleted in oocytes. Total RNA samples from YTHDF2 deficient GV and MII oocytes (and control oocytes) were subjected to array profiling.

2018-02-12 | E-MTAB-5576 | biostudies-arrayexpress

YTHDF2 regulates self non-coding RNA metabolism to control TLR3 activation in Inflammation

Project description:To elucidate the roles of YTHDF2 in the UV response in Human Keratinocyte (HaCaT) cells, the YTHDF2 interactome was analyzed through immunoprecipitation using a YTHDF2-specific antibody. Control IgG served as a negative control in this study. The cells were treated with UVB at 20 mJ/cm², and one hour post-treatment, alterations in the binding partners interacting with YTHDF2, along with their post-translational modifications, were analyzed using proteomics.

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The RNA m6A reader YTHDF2 maintains oncogene expression and is a targetable dependency in glioblastoma stem cells [RNA-seq]

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Microarray analysis of YTHDF2-deficient leukemic stem cells

Project description:YTHDF2 is overexpressed in a broad spectrum of human acute myeloid leukemias (AML). To study the role of YTHDF2 in leukemia, total RNA from Ythdf2CKO (n=4) and Ythdf2CTL (n=4) leukemic stem cells were used for Affymetrix global gene expression analysis.

2019-04-05 | E-MTAB-7782 | biostudies-arrayexpress

The RNA m6A reader YTHDF2 maintains oncogene expression and is a targetable dependency in glioblastoma stem cells [m6A RIP-seq]

2020-09-29 | GSE158741 | GEO

Proteotoxic stress-induced apoptosis in cancer cells: understanding the susceptibility and enhancing the potency

Project description:Leiomyosarcoma (LMS) is an aggressive cancer with few therapeutic options. LMS cells are more sensitive to proteotoxic stress compared to normal smooth muscle cells. We used small compound 2c to induce proteotoxic stress and compare the transcriptomic adaptations of immortalized human uterine smooth muscle cells (HUtSMC) and LMS cells SK-UT-1. We found that the expression of the heat shock proteins (HSP) gene family is upregulated with higher efficiency in normal cells. In contrast, upregulation of BH3-only proteins is higher in LMS cells. HSF1, the master regulator of HSP transcription, is sequestered into transcriptionally incompetent nuclear foci only in LMS cells, which explains the lower HSP upregulation. We also found that several compounds can enhance the cell death response to proteotoxic stress. Specifically, when low doses were used, an inhibitor of salt-inducible kinases (SIKs) and the inhibitor of IRE1, a key element of the unfolded protein response (UPR), support proteotoxic-induced cell death with strength in LMS cells and without effects on the survival of normal cells. Overall, our data provide an explanation for the higher susceptibility of LMS cells to proteotoxic stress and suggest a potential option for co-treatment strategies.

2022-10-03 | GSE205596 | GEO

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