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IGF2BP1 enhances an aggressive tumor cell phenotype by impairing miRNA-directed downregulation of oncogenic factors [small RNA]

ABSTRACT: IGF2BP1 enhances an aggressive tumor cell phenotype by impairing miRNA-directed downregulation of oncogenic factors [small RNA]

PROVIDER: PRJNA430865 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR6503153.fastq.gz	Fastqsanger.gz
	SRR6503154.fastq.gz	Fastqsanger.gz
	SRR6503155.fastq.gz	Fastqsanger.gz
	SRR6503156.fastq.gz	Fastqsanger.gz
	SRR6515964.fastq.gz	Fastqsanger.gz

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IGF2BP1 enhances an aggressive tumor cell phenotype by impairing miRNA-directed downregulation of oncogenic factors

Project description:IGF2BP1 enhances an aggressive tumor cell phenotype by impairing miRNA-directed downregulation of oncogenic factors

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IGF2BP1 enhances an aggressive tumor cell phenotype by impairing miRNA-directed downregulation of oncogenic factors [mRNA]

Project description:IGF2BP1 enhances an aggressive tumor cell phenotype by impairing miRNA-directed downregulation of oncogenic factors [mRNA]

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IGF2BP1 enhances an aggressive tumor cell phenotype by impairing miRNA-directed downregulation of oncogenic factors [HUH-7 small RNA]

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IGF2BP1 enhances an aggressive tumor cell phenotype by impairing miRNA-directed downregulation of oncogenic factors [mRNA]

Project description:The oncofetal IGF2 mRNA binding protein (IGF2BP) family modulates tumor cell properties but IGF2BP paralogue-specific roles remain poorly understood. We demonstrate that phenotypic roles of IGF2BPs vary in a cancer cell-dependent manner. However, only IGF2BP1 shows oncogenic potential in all cancer cells analyzed. Consistently, only IGF2BP1 expression is associated with poor prognosis in ovarian carcinoma and promotes all oncogenic properties analyzed in ovarian cancer-derived tumor cells. Despite a substantial overlap of candidate target mRNAs of IGF2BP paralogues proposed by CLIP analyses, the paralogue-specific depletion of IGF2BPs induces strikingly distinct deregulation of mRNA abundance. Transcripts decreased by IGF2BP1 depletion or knockout are enriched for IGF2BP1- as well as AGO-CLIP hits conserved in distinct cell lines, are prone to targeting by highly abundant miRNAs and comprise significantly longer 3’UTRs. Downregulation of target mRNAs upon IGF2BP1 depletion is abrogated when miRNAs are expressed at low levels or depleted by DICER/DROSHA knockdown. Strikingly, the depletion of all 12 randomly selected miRNA-prone target mRNAs impairs at least one analyzed IGF2BP1-modulated tumor cell property. These findings indicate that IGF2BPs serve distinct roles in cancer-derived cells and suggest that IGF2BP1’s main role is the post-transcriptional, miRNome-dependent enhancement of factors promoting oncogenic tumor cell properties.

2018-03-19 | GSE109604 | GEO

IGF2BP1 enhances an aggressive tumor cell phenotype by impairing miRNA-directed downregulation of oncogenic factors [small RNA]

Project description:The oncofetal IGF2 mRNA binding protein (IGF2BP) family modulates tumor cell properties but IGF2BP paralogue-specific roles remain poorly understood. We demonstrate that phenotypic roles of IGF2BPs vary in a cancer cell-dependent manner. However, only IGF2BP1 shows oncogenic potential in all cancer cells analyzed. Consistently, only IGF2BP1 expression is associated with poor prognosis in ovarian carcinoma and promotes all oncogenic properties analyzed in ovarian cancer-derived tumor cells. Despite a substantial overlap of candidate target mRNAs of IGF2BP paralogues proposed by CLIP analyses, the paralogue-specific depletion of IGF2BPs induces strikingly distinct deregulation of mRNA abundance. Transcripts decreased by IGF2BP1 depletion or knockout are enriched for IGF2BP1- as well as AGO-CLIP hits conserved in distinct cell lines, are prone to targeting by highly abundant miRNAs and comprise significantly longer 3’UTRs. The downregulation of target mRNAs observed upon IGF2BP1 depletion is abrogated when miRNAs are expressed at low levels or depleted by DICER/DROSHA knockdown. Strikingly, the depletion of 10 randomly selected miRNA-prone target mRNAs impairs at least one analyzed IGF2BP1-modulated tumor cell property. These findings indicate that IGF2BPs serve distinct roles in cancer-derived cells and suggest that IGF2BP1’s main role is the post-transcriptional, miRNome-dependent enhancement of factors promoting oncogenic tumor cell properties.

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IGF2BP1 enhances an aggressive tumor cell phenotype by impairing miRNA-directed downregulation of oncogenic factors [HUH-7 small RNA]

2018-03-19 | GSE109677 | GEO

IGF2BP1 enhances an aggressive tumor cell phenotype by impairing miRNA-directed downregulation of oncogenic factors.

Project description:The oncofetal IGF2 mRNA binding proteins (IGF2BPs) are upregulated in most cancers but their paralogue-specific roles in tumor cells remain poorly understood. In a panel of five cancer-derived cell lines, IGF2BP1 shows highly conserved oncogenic potential. Consistently, the deletion of IGF2BP1 impairs the growth and metastasis of ovarian cancer-derived cells in nude mice. Gene expression analyses in ovarian cancer-derived cells reveal that the knockdown of IGF2BPs is associated with the downregulation of mRNAs that are prone to miRNA regulation. All three IGF2BPs preferentially associate upstream of miRNA binding sites (MBSs) in the 3'UTR of mRNAs. The downregulation of mRNAs co-regulated by miRNAs and IGF2BP1 is abrogated at low miRNA abundance or when miRNAs are depleted. IGF2BP1 associates with these target mRNAs in RISC-free complexes and its deletion enhances their association with AGO2. The knockdown of most miRNA-regulated target mRNAs of IGF2BP1 impairs tumor cell properties. In four primary cancers, elevated synthesis of these target mRNAs is largely associated with upregulated IGF2BP1 mRNA levels. In ovarian cancer, the enhanced expression of IGF2BP1 and most of its miRNA-controlled target mRNAs is associated with poor prognosis. In conclusion, these findings indicate that IGF2BP1 enhances an aggressive tumor cell phenotype by antagonizing miRNA-impaired gene expression.

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IGF2BP1 enhances an aggressive tumor cell phenotype by impairing miRNA-directed downregulation of oncogenic factors

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2018-03-19 | GSE109605 | GEO

IGF2BP1 promotes SRF-dependent transcription in cancer in a m6A- and miRNA-dependent manner [IGF2BP1 and SRF KD in ES-2 (total RNA)]

Project description:The oncofetal mRNA-binding protein IGF2BP1 and the transcriptional regulator SRF modulate gene expression in cancer. In cancer cells, we demonstrate that IGF2BP1 promotes the expression of SRF in a conserved and N6-methyladenosine (m6A) dependent manner by impairing the miRNA-directed decay of the SRF mRNA. This results in enhanced SRF-dependent transcriptional activity and promotes tumor cell growth and invasion. At the post-transcriptional level, IGF2BP1 sustains the expression of various SRF-target genes. The majority of these SRF/IGF2BP1-enhanced genes, including PDLIM7 and FOXK1, shows conserved upregulation with SRF and IGF2BP1 synthesis in cancer. PDLIM7 and FOXK1 promote tumor cell growth and were reported to enhance cell invasion. Consistently, 35 SRF/IGF2BP1-dependent genes showing conserved association with SRF and IGF2BP1 expression indicate a poor overall survival probability in ovarian, liver and lung cancer. In conclusion, these findings identify the SRF/IGF2BP1-, miRNome- and m6A-dependent control of gene expression as a conserved oncogenic driver network in cancer.

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IGF2BP1 promotes SRF-dependent transcription in cancer in a m6A- and miRNA-dependent manner [miRNA-seq]

2018-10-10 | GSE116179 | GEO