Potential Roles of IGF2BP3 in Bladder Cancer [m6A-seq]
Ontology highlight
ABSTRACT: TCGA data analysis and clinical sample test results showed the IGF2BP3 is highly expressed in bladder cancer and related to tumor metastasis and invasion. RNA sequencing results of clinical bladder tissue from 53 cases showed that the IGF2BP3 expression is related to cell proliferation genes. M6a and RNA sequencing results showed the IGF2BP3 affects the growth, proliferation, and apoptosis of T24 cells, and SpHK1, POMT2, and MRPS18a may be potential targets of IGF2BP3.
Project description:TCGA data analysis and clinical sample test results showed the IGF2BP3 is highly expressed in bladder cancer and related to tumor metastasis and invasion. RNA sequencing results of clinical bladder tissue from 53 cases showed that the IGF2BP3 expression is related to cell proliferation genes. M6a and RNA sequencing results showed the IGF2BP3 affects the growth, proliferation, and apoptosis of T24 cells, and SpHK1, POMT2, and MRPS18a may be potential targets of IGF2BP3.
Project description:Merkel cell carcinoma (MCC) is an aggressive skin cancer with frequent development of metastases, however effective treatment options for advanced disease are often missing. In this study, we investigated the clinical significance and functional impact of the Insulin-like growth factor 2 mRNA-binding protein 3 (IGF2BP3) in MCC. Our results revealed elevated IGF2BP3 expression in metastases as compared to primary tumors. High IGF2BP3 levels in primary MCCs were associated with shorter disease-specific survival. In an MCC xenograft model, lung metastases exhibited increased IGF2BP3 expression. Functional studies showed that IGF2BP3 primarily regulates cell migration and invasion in MCC. We identified 281 direct RNA targets of IGF2BP3 with enriched functions linked to metastasis-related processes and several targets overlapped with genes differentially expressed between MCC primary tumors and metastases, implying that IGF2BP3 and its targets contribute to tumor progression. Inhibition or silencing of bromodomain-containing protein 4 (BRD4) reduced IGF2BP3 expression, suggesting BRD4 as a potential regulator of IGF2BP3. Our study underscores the role of IGF2BP3 in MCC metastasis and its potential as a prognostic biomarker.
Project description:To reveal the effects of IGF2BP3 on mouse spermatids at the post-transcriptional and translational levels, we performed RNA-seq and ribosome nascent-chain complex sequencing (RNC-seq) of spermatids from Igf2bp3+/- and Igf2bp3-/- mice after isolation. RNA-seq and RNC-seq sequencing showed that IGF2BP3 mainly plays a regulatory role in translational repression in spermatids.
Project description:The goal of this study was to determine IGF2BP3 regulation of RNA targets in human pacreatic ductal adenocarcinoma cell lines Included are iCLIP-seq libraries for IGF2BP3 from PL45 and Panc1 PDAC cell samples, RIP-seq samples from PL45 and Panc1 PDAC cells, RNA-seq data sets from control and IGF2BP3 knockdown in PL45 and Panc1 PDAC cells, and small RNA-seq samples from Panc1 cells
Project description:To explain the possible molecular mechanism underlying the oncogenic roles of IGF2BP3 in EC, we employed RNA immunoprecipitation (RIP) assays to identify the lncRNAs involved in the regulation of IGF2BP3 function. RIP experiments, high-throughput sequencing and data analysis were performed by Seqhealth Tech (Wuhan, China). RIP assays were carried out on Ishikawa cells. The cells were lysed, and the lysis samples for immunoprecipitation reactions were incubated with anti-IGF2BP3 antibody (ab177477, Abcam, USA) or rabbit IgG (Cell Signaling Technology). The library products were enriched, quantified and finally sequenced on the Illumina PE150 platform.One hundred ninety-one candidates as IGF2BP3-interacting lncRNAs were identified in the RIP-seq results.
Project description:The goal of this study was to determine IGF2BP3 RNA targets in human B-cell Acute Lymphocitic Leukemia cell models. Included are iCLIP-seq libraries for IGF2BP3 from RS4;11 and REH B-ALL cell samples and RNA-seq data sets from control and IGF2BP3 knockdown RS4;11 B-ALL cell lines
Project description:In our study, we found that MLL-AF4 transcriptionally induces IGF2BP3 and is required for MLL-Af4 mediated leukemogenesis. Deletion of murine Igf2bp3 significantly increased the survival of mice with MLL-Af4 driven leukemia and greatly attenuated disease. Furthermore, Igf2bp3 was necessary for the development of and the self-renewal capacity of MLL-Af4 leukemic initiating cells. eCLIP and transcriptome analysis of MLL-Af4 transformed stem and progenitor cells and primary cells from MLL-Af4 leukemic mice revealed an IGF2BP3-regulated post-transcriptional operon governing tumor cell survival and proliferation. Critical mRNA targets include the Hoxa locus and numerous genes within the Ras signaling pathway. Together, our findings show that IGF2BP3 is an essential positive regulator of MLL-AF4 mediated leukemogenesis and is a potential therapeutic target in this disease.
Project description:Advanced bladder cancer is treated mainly with gemcitabine and cisplatin, but most patients eventually become resistance to these chemotherapeutic agents. Androgen receptor (AR) signaling has been implicated in bladder cancer as well as other types of cancer including prostate cancer. In the present study, we showed the expression and role of AR in gemcitabine-resistant bladder cancer cells and examined the potential of enzalutamide, an AR inhibitor, as a therapeutic for the chemoresistance. First of all, we established gemcitabine-resistant T24 cells (T24GR) from T24 bladder cancer cells and performed gene expression profiling and network analysis, which revealed increased AR expression and AR-related gene network in T24GR cells. Quantitative RT-PCR and Western blot analysis confirmed increased expression of AR in T24GR cells compared with parental T24 cells, which was associated with more potent transcriptional activity of AR in T24GR cells. The number of AR gene copy in T24GR cells was twice as many as that of T24 cells. Knockdown of AR expression by siRNA resulted in inhibition of proliferation of T24GR cells. Cell culture in charcoal-stripped serum and treatment with enzalutamide also inhibited growth of T24GR cells, which was accompanied by cell cycle arrest. Lastly, the AR transcriptional activity was found to be reduced in T24GR cells by enzalutamide treatment. Our results suggest that blockade of AR signaling by enzalutamide might be effective for patients with advanced gemcitabine-resistant bladder cancer with increased AR expression.
Project description:We knocked down SOX4 in T24 cell and created 3 cell lines: T24-scrambled, T24-SOX4-knockdown and T24-SOX4-rescue and compared gene expression changes SOX4 is a developmental transcription factor that is overexpressed in as many as 23% of bladder cancer patients, but the role of SOX4 in bladder cancer tumorigenesis is not well understood. Given SOX4’s many roles in embryonic development and context-dependent regulation of gene expression, we sought to understand SOX4’s contribution to bladder cancer and to elucidate SOX4 regulated genes that might contribute to tumorigenesis. We employed a CRISPR interference (CRISPRi) method to transcriptionally repress SOX4 expression in T24 bladder cancer cell lines, rescued these cell lines with lentivirally expressed SOX4, and performed whole genome expression profiling. SOX4 knockdown cells exhibited decreased invasive capabilities but no changes in migration or proliferation, while rescue with SOX4 lentiviral vector restored the invasive phenotype. Gene expression profiling revealed 173 high confidence SOX4 regulated genes