Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Long non-coding RNA ELDR promotes cell cycle progression in normal oral keratinocytes through induction of a CTCF-FOXM1-AURKA signaling axis

ABSTRACT: Long non-coding RNAs (lncRNAs) have gained widespread attention as a potential new layer of regulation in biological processes during development and disease. The lncRNA ELDR (EGFR long non‐coding downstream RNA) was recently shown to be highly expressed in oral cancers as compared to adjacent non-tumor tissue, and we previously reported that ELDR may be an oncogene as inhibition of ELDR reduces tumor growth in oral cancer models. Furthermore, overexpression of ELDR induces proliferation and colony formation in normal oral keratinocytes (NOKs). In this study, we examined in further detail how ELDR drives the neoplastic transformation of normal keratinocytes. We performed RNA-seq analysis on NOKs stably expressing ELDR (NOK-ELDR), which revealed that ELDR enhances the expression of cell cycle-related genes. Increased expression of Aurora kinase A (AURKA) and its downstream gene targets Polo-Like Kinase 1 (PLK1), Cell Division Cycle 25C (CDC25C), Cyclin-Dependent Kinase 1 (CDK1), and Cyclin B1 (CCNB1) are significantly increased in NOK-ELDR cells, suggesting induction of G2/M progression. We further identified CCCTC-Binding Factor (CTCF) as a binding partner of ELDR in NOK-ELDR cells. We showed that ELDR stabilizes CTCF and increases its expression. Finally, we demonstrate the ELDR-CTCF axis upregulates transcription factor Forkhead Box M1 (FOXM1), which induces AURKA expression and downstream G2/M transition. These findings provide mechanistic insights into the role of the lncRNA ELDR as a potential driver of oral cancer during neoplastic transformation of normal keratinocytes.

ORGANISM(S): Homo sapiens

PROVIDER: GSE198818 | GEO | 2022/05/11

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Similar Datasets

Homo sapiens

Project description:Human normal oral keratinocytes (NOK) siRNA and Human epidermal keratinocytes (HEK) overexpression RNA-Seq

| PRJNA382445 | ENA

Chemokine receptor CXCR7 activates Aurora Kinase A and promotes neuroendocrine prostate cancer growth

Project description:CXCR7, an atypical chemokine receptor (ACKR3), is up-regulated in NEPC, and its expression is associated with molecular markers of NEPC and cell proliferation. Transcriptomic analyses revealed a major role of CXCR7 in regulating downstream genes involved in the cell cycle and mitotic spindle. Membrane-bound CXCR7 is known to recruit β-arrestin (ARRB2), and the complex internalizes into clathrin-coated vesicles where they act as a scaffold for cytoplasmic kinase assembly and substrate activation. We identify Aurora Kinase A (AURKA) as a top candidate that is binding to and activated by CXCR7-ARRB2. Immunofluorescence confocal microscopy detected high-density CXCR7, ARRB2, and AURKA in the pericentrosomal area with focal staining of ARRB2 and ARUKA at centrosomes. Mass spectrometry showed that CXCR7 interacts with many proteins associated with intracellular vesicles, microtubules, and Golgi apparatus. CXCR7-ARRB2-containing vesicles traffic along the microtubules to the perinuclear Golgi apparatus, where CXCR7-ARRB2 interacts with AURKA to promote its activation and cell growth. Finally, we showed that pharmacological inhibitors of AURKA abolish CXCR7-driven tumor growth. Our study reveals CXCR7-mediated activation of AURKA and establishes CXCR7 and its downstream kinases as critical targets for therapeutic intervention in CRPC or NEPC patients.

2023-05-14 | GSE199274 | GEO

Shp2 Signaling Suppresses Senescence in PyMT-induced Mammary Gland Cancer in Mice [Mouse430_2 array]

Project description:In this study, we have used techniques from cell biology, biochemistry, and genetics to investigate the role of the tyrosine phosphatase Shp2 in tumor cells of MMTV-PyMT mouse mammary glands. Genetic ablation or pharmacological inhibition of Shp2 induces senescence, as determined by the activation of senescence-associated ?-gal (SA-?-gal), cyclin-dependent kinase inhibitor 1B (p27), p53, and histone 3 trimethylated lysine 9 (H3K9me3). Senescence induction leads to inhibition of self-renewal of tumor cells and blockage of tumor formation and growth. A signaling cascade was identified that acts downstream of Shp2 to counter senescence: Src, Focal adhesion kinase and Map kinase inhibit senescence by activating the expression of S-phase kinase-associated protein 2 (Skp2), Aurora kinase A (Aurka), and the Notch ligand Delta-like 1 (Dll1), which block p27 and p53. Remarkably, the expression of Shp2 and of selected target genes predicts human breast cancer outcome. We conclude that therapies which rely on senescence induction by inhibiting Shp2 or controlling its target gene products may be useful in blocking breast cancer. Primary mammary tumor cells from MMTV-PyMT mice were cultured as mammospheres for 10 days and then treated with specific inhibitors of Notch (DAPT), MEK1 (U0126), FAK (TAE226), or Src (PP2) for another 2 days. Mammospheres were then subjected to RNA isolation. Each group contains 3 replicates.

2015-03-06 | E-GEOD-50517 | biostudies-arrayexpress

Shp2 Signaling Suppresses Senescence in PyMT-induced Mammary Gland Cancer in Mice [Mouse430A_2 array]

Project description:In this study, we have used techniques from cell biology, biochemistry, and genetics to investigate the role of the tyrosine phosphatase Shp2 in tumor cells of MMTV-PyMT mouse mammary glands. Genetic ablation or pharmacological inhibition of Shp2 induces senescence, as determined by the activation of senescence-associated β-gal (SA-β-gal), cyclin-dependent kinase inhibitor 1B (p27), p53, and histone 3 trimethylated lysine 9 (H3K9me3). Senescence induction leads to inhibition of self-renewal of tumor cells and blockage of tumor formation and growth. A signaling cascade was identified that acts downstream of Shp2 to counter senescence: Src, Focal adhesion kinase and Map kinase inhibit senescence by activating the expression of S-phase kinase-associated protein 2 (Skp2), Aurora kinase A (Aurka), and the Notch ligand Delta-like 1 (Dll1), which block p27 and p53. Remarkably, the expression of Shp2 and of selected target genes predicts human breast cancer outcome. We conclude that therapies which rely on senescence induction by inhibiting Shp2 or controlling its target gene products may be useful in blocking breast cancer.

2015-03-06 | GSE50516 | GEO

Shp2 Signaling Suppresses Senescence in PyMT-induced Mammary Gland Cancer in Mice [Mouse430_2 array]

Project description:In this study, we have used techniques from cell biology, biochemistry, and genetics to investigate the role of the tyrosine phosphatase Shp2 in tumor cells of MMTV-PyMT mouse mammary glands. Genetic ablation or pharmacological inhibition of Shp2 induces senescence, as determined by the activation of senescence-associated β-gal (SA-β-gal), cyclin-dependent kinase inhibitor 1B (p27), p53, and histone 3 trimethylated lysine 9 (H3K9me3). Senescence induction leads to inhibition of self-renewal of tumor cells and blockage of tumor formation and growth. A signaling cascade was identified that acts downstream of Shp2 to counter senescence: Src, Focal adhesion kinase and Map kinase inhibit senescence by activating the expression of S-phase kinase-associated protein 2 (Skp2), Aurora kinase A (Aurka), and the Notch ligand Delta-like 1 (Dll1), which block p27 and p53. Remarkably, the expression of Shp2 and of selected target genes predicts human breast cancer outcome. We conclude that therapies which rely on senescence induction by inhibiting Shp2 or controlling its target gene products may be useful in blocking breast cancer.

2015-03-06 | GSE50517 | GEO

Long non-coding RNA ELDR promotes cell cycle progression in normal oral keratinocytes through induction of a CTCF-FOXM1-AURKA signaling axis

Project description:Long non-coding RNA ELDR promotes cell cycle progression in normal oral keratinocytes through induction of a CTCF-FOXM1-AURKA signaling axis

| PRJNA816974 | ENA

Oncogenic PKA signaling stabilizes MYC oncoproteins via an aurora kinase A-dependent mechanism

Project description:Genetic alterations that activate protein kinase A (PKA) signaling are found across many tumor types, but their downstream oncogenic mechanisms are poorly understood. We used global phosphoproteomics and kinome activity profiling to map the conserved signaling outputs driven by diverse genetic changes that activate PKA in cancer. We define two consensus networks of effectors downstream of PKA in cancer models including melanoma and fibrolamellar carcinoma [FLC]. One is centered on RAS/MAPK components and a second involves Aurora Kinase A (AURKA). We find that AURKA stabilizes c-MYC and n-MYC protein levels and expression programs in PKA-dependent tumor models, in part via a positive feedback loop mediated by the oncogenic kinase PIM2. This process can be suppressed by conformation-disrupting AURKA inhibitors such as CD-532. Our findings elucidate two independent mechanisms of PKA-driven tumor cell growth and designate drug targets for study in FLC and other PKA-dependent malignancies.

2023-02-09 | PXD025508 | Pride

Hypoxia-induced alterations of G2 checkpoint regulators

Project description:Hypoxia promotes an aggressive tumor phenotype with increased genomic instability, partially due to downregulation of DNA repair pathways. However, in addition to DNA repair, genome stability is also controlled by cell cycle checkpoints. An important issue is therefore whether hypoxia also can alter the DNA damage cell cycle checkpoints. Here, we show that hypoxia (24h 0.2% O2) alters the expression of several G2 checkpoint regulators, as examined by microarray gene expression analysis and immunoblotting of U2OS cells. While some of the changes reflected hypoxia-induced inhibition of cell cycle progression, flow cytometric bar-coding analysis of individual cells showed that the levels of several G2 checkpoint regulators were reduced in G2 phase cells after hypoxic exposure, in particular cyclin B1. These effects were accompanied by decreased Cyclin dependent kinase (CDK) activity in G2 phase cells after hypoxia. Furthermore, cells pre-exposed to hypoxia showed a longer G2 checkpoint arrest upon treatment with ionizing radiation. Similar results were found following other hypoxic conditions (~0.03 % O2 20h and 0.2% O2 72h). These results demonstrate that the DNA damage G2 checkpoint can be altered as a consequence of hypoxia, and we propose that such alterations may influence the genome stability of hypoxic tumors. We measured gene expression changes in U2OS cells after treatment with 0.2% hypoxia for 24 hours. The data were used in the exploration of hyopxia induced alterations in the G2 checkpoint.

2016-01-04 | E-GEOD-70530 | biostudies-arrayexpress

β-TrCP and Casein Kinase II mediated degradation of cyclin F controls timely mitotic progression

Project description:Orderly progressions of events in the cell division cycle are necessary to ensure the replication of DNA and cell division. Checkpoint systems allow the accurate execution of each cell cycle phase. The precise regulation of the levels of cyclin proteins is fundamental to coordinate cell division with checkpoints, avoiding genome instability. Cyclin F has important functions in regulating the cell cycle during the G2 checkpoint; however, the mechanisms underlying the regulation of cyclin F are poorly understood. Here, we observe that cyclin F is regulated by proteolysis through β-TrCP. β-TrCP recognizes cyclin F through a non-canonical degron site (TSGXXS) after its phosphorylation by Casein Kinase II. The degradation of cyclin F mediated by β-TrCP occurs at the G2/M transition and this event is required to promote mitotic progression and favours the activation of a transcriptional programme required for mitosis.

2018-10-02 | PXD010737 | Pride

Cyclin Specificity Governs Centrosomal Cyclin/CDK Localisation and is Necessary for the G2/M Transition

Project description:In eukaryotes, cyclin/CDK complexes drive cells through DNA replication and mitosis, establising cell cycle temporal order. The fission yeast S. pombe is able to function with a single cyclin/CDK complex, with cell cycle order emerging from differential substrate sensitivities to CDK activity. What influence cyclin specificity has upon the cell cycle in this situation is currently unknown. Here we show that in a system that is reliant on a single cyclin for both the G1/S and G2/M transition, cyclin specificity is not needed for the G1/S transition, but instead is required for the G2/M transition and correct localisation of cyclin/CDK to the yeast centrosome equivalent, the SPB. This loss of centrosome localisation was also seen in human cells expressing mutant Cyclin B1, suggesting conservation of function. In fission yeast, although interphase centrosomal localisation is lost, mitotic SPB localisation remains. This hitherto unknown second localisation method is dependent on Polo kinase, suggesting a finer spatiotemporal control of cyclin/CDK during cell cycle progression than previously known. Thus, cyclin specificity is intrinsically twinned with spatial control of cyclin/CDK, and we suggest that this regulation may be conserved through evolution.

2019-05-27 | PXD011987 | Pride

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data