RNAseq of 4T1 cells expressing exogenous LINC01133
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ABSTRACT:
PROVIDER: PRJNA873199 | ENA |
REPOSITORIES: ENA
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Project description:The PI3K pathway represents the most hyperactivated oncogenic pathway in triple-negative breast cancer (TNBC), a highly aggressive tumor subtype encompassing ~15% of breast cancers with no targeted therapeutics. Despite critical contributions of its signaling arms to disease pathogenesis, PI3K pathway inhibitors have not achieved expected clinical responses in TNBC owing largely to still-incomplete understanding of the compensatory cascades that operate downstream of PI3K. Here, we investigated the contributions of long non-coding RNAs (lncRNAs) to PI3K activities in clinical and experimental TNBC, and discovered a prominent role for LINC01133 as a PI3K-AKT signaling effector. We found that LINC01133 exerted pro-tumorigenic roles in TNBC, and that it governed a previously undescribed mTORC2-dependent pathway that activated AKT in a PI3K-independent manner. Mechanistically, we show that LINC01133 induced the expression of the mTORC2 component PROTOR1/PRR5 by competitively coupling away its negative mRNA regulator, the heterogeneous nuclear ribonucleoprotein A2/B1 (hnRNPA2B1). PROTOR1/PRR5 in turn was sufficient and necessary for LINC01133-triggered functions, casting previously unappreciated roles for this Rictor-binding protein in cellular signaling and growth. Notably, LINC01133 antagonism undermined cellular growth and we show that the LINC01133-PROTOR1/PRR5 pathway tightly associated with TNBC poor patient survival. Altogether, our findings uncovered a lncRNA-driven signaling shunt that acts as a critical determinant of malignancy downstream of the PI3K pathway and as a potential RNA-based theranostic in clinical TNBC management. We performed comparative gene expression profiling analyses using RNA-seq of triplicates of control 4T1 cells (harboring empty plasmid control) and 4T1 cell trioplicates expressing exogenous LINC01133.
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Project description:RNAseq analysis of U2OS cell clones made to stably expressing exogenous CIITA
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Project description:The long intergenic non-coding RNA linc01133 is reported to be oncogenic in various malignancies. However, the role and mechanism of linc01133 in regulating gastric cancer growth is still not clear. In the present study, we found that linc01133 was significantly up-regulated in gastric cancer tissues compared to non-tumorous gastric tissues. Linc01133 over-expression significantly correlated with tumor size and tumor differentiation in gastric cancer patients. The expression of linc01133 was regulated by c-Jun and c-Fos collaboratively. In both in vitro and in vivo studies, linc01133 was shown to promote gastric cancer cell growth. Linc01133 localized in the cytoplasm and functioned as an endogenous competing RNA of miR-145-5p to up-regulate the expression of YES1，which was proved to be the target gene of miR-145-5p. By promoting YES1-dependent YAP1 nuclear translocation, linc01133 up-regulated the expression of the key cell cycle regulators CDK4, CDK6 and cyclin D1 to promote G1-S phase transition. Thus, our study unveiled the function and mechanism of linc01133 regulating cell cycle progression in gastric cancer.
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Project description:The transcriptional profile 23 cell lines derived from single clones of the 4T1 cell lines were assessed with RNAseq. The two clones with a strong propensity to intravasate were found to have 12 genes in common that were overexperessed relative to the other 21 clones.
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Project description:Bulk RNAseq analysis was done on single cell clones of U2OS cells either expressing exogeonous CIITA or an empty vector control to identify genes regulated by CIITA expression.
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Project description:Comparative analysis of the transcriptome of 4T1 cells stably transduced with a lentiviral vector expressing a siRNA against murine SPARC (4T1-C18) with 4T1 control cells stably transduced with a lentiviral vector expressing a scramble sequence (4T1-SCR). Two-condition experiment, 4T1-C18 vs. 4T1-SCR cells. Biological replicates: 4 SPARC knock down, 4 control, independently grown in vitro and harvested. One replicate per array. Microarrays were hybridized in three different days.
2016-06-29 | E-GEOD-83830 | biostudies-arrayexpress
Project description:Analysis of uPA regulation of 4T1 tumor growth at gene expression level. The hypothesis tested in the present study was that overexpression of uPA in 4T1 tumor influence the tumor growth and metastasis related cell signaling pathway. 4T1 cells were stably transduced by lentiviral vector expressing mouse uPA or empty vector. After day 7 of inoculation of 4T1 cells into fatpad of Balb/c mice. Total RNA was extracted from tumor samples (triplicate) using Qiagen total RNA isolation kit. The Illumina MouseWG-6 v2.0 Expression BeadChip (Illumina, Wallingford, CT) was used for gene expression. The raw data from the fluorescence intensity measurements of each array experiment was processed using GeneSpringGX v.11.0 software (Agilent, Santa Clara, CA). Statistical analysis, fold change calculations, and hierarchical clustering of the data were also performed in GeneSpring software. Genes that expressed significantly differently with more than 1.5-fold change and a p-value of <0.05 with respect to controls were taken into consideration. Gene expression data were further validated by qRT-PCR analysis. Pathway analysis was performed by MetaCore software (GeneGo, Inc, St. Joseph, MI).
2012-05-30 | E-GEOD-38346 | biostudies-arrayexpress
Project description:Comparative analysis of the transcriptome of 4T1 cells stably transduced with a lentiviral vector expressing a siRNA against murine SPARC (4T1-C18) with 4T1 control cells stably transduced with a lentiviral vector expressing a scramble sequence (4T1-SCR).
2016-06-29 | GSE83830 | GEO
Project description:Endometriosis is a common gynecological disorder characterized by ectopic growth of endometrium outside the uterus and associated with chronic pain and infertility. We investigated the role of LINC01133 in endometriosis, an lncRNA that has been implicated in several types of cancer. We found that LINC01133 is upregulated in ectopic endometriosis lesions. As expression appeared higher in the epithelial endometrial layer, we performed an siRNA knockdown of LINC01133 in an endometriosis epithelial cell line. Phenotypic assays indicated that LINC01133 may promote proliferation and suppress cellular migration, and affect the cytoskeleton and morphology of the cells. Gene ontology analysis of differentially expressed genes detected by RNA sequencing indicated that cell proliferation and migration pathways were affected in line with the observed phenotype. We validated upregulation of p21 and downregulation of cyclin at the protein level, which together with DNA FACS analysis indicated that the observed effects on cellular proliferation may be due to changes in cell cycle progression. Further, we validated upregulation of the protein kinase TESK1 at the protein level, and found a corresponding increased phosphorylation and therefore inactivation of the actin severing protein Cofilin, which may explain changes in the cytoskeleton and cellular migration. These results indicate that LINC01133 upregulation is associated with endometriosis, which may be due to its effects on genes involved in the cellular proliferation and migration pathways.
2021-08-23 | GSE174741 | GEO
Project description:Pancreatic ductal adenocarcinoma (PDAC) is a lethal disease with limited treatment methods. Long non-coding RNAs (lncRNAs) have been found involved in tumorigenic and progression. The present study revealed that LINC01133, a fewly reported lncRNA, was one of 16 hub genes that could predict PDAC patients' prognosis. LINC01133 was over-expressed in PDAC tumors compared to adjacent pancreas, and could promote PDAC proliferation and metastasis in vitro and in vivo, as well as inhibited PDAC apoptosis. LINC01133 expression positively correlated to secreted phosphoprotein 1 (SPP1) expression, leading to an enhanced epithelial-mesenchymal transition (EMT) process. LINC01133 bound with actin-related protein 3 (Arp3), the complex reduced SPP1 mRNA degradation which increased SPP1 mRNA level, ultimately leading to PDAC proliferation. This research revealed a novel mechanism of PDAC development and provided a potential prognosis indicator that may benefit PDAC patients.
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