RNA sequencing of neuroblastoma cells treated with selinexor or with XPO1 knockdown
Ontology highlight
ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE178937 | GEO | 2025/05/19
REPOSITORIES: GEO
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Project description:Neuroblastoma accounts for 15% of cancer-related deaths in children, highlighting an unmet need for novel therapies. Selinexor is a small molecule inhibitor of XPO1 that shuffles cargo proteins with a nuclear export sequence, many of which are essential for cancer growth and cell maintenance, from the nucleus to the cytosol. We systematically tested the effect of selinexor against neuroblastoma cells in vitro and in vivo and used a proteomics screening approach to interrogate unknown mechanisms of action. We found that selinexor induces its cytotoxic effects in neuroblastoma through the nuclear accumulation of p53. By combining selinexor with an aurora kinase inhibitor, alisertib that is already in clinical use for neuroblastoma, we show that p53-mediated lethality can be further augmented supporting clinical testing of this drug combination against neuroblastoma
2023-03-11 | PXD026454 | Pride
Project description:RNA sequencing of neuroblastoma cells treated with selinexor or with XPO1 knockdown
| PRJNA741521 | ENA
Project description:In order to characterize the dynamics of proteins between different cellular compartments in response to selinexor (XPO1 inhibitor), MK-2206 (Akt inhibitor) an the combination i AML cells, we treated MV4-11 and PL-21 cells for 6 hours with DMSO, 1 uM selinexor, 1 uM MK-2206 or the combination. Each condition was performed in 4 biological bio-reps.
2022-08-07 | PXD033527 | Pride
Project description:The five-year survival rate remains less than 50% for high-risk neuroblastoma patients, few of them show effective response to current chemotherapy drugs. It is urgent to identify new therapeutic targets and corresponding drugs for high-risk neuroblastoma. Exportin-1(XPO1), also known as chromosomal region maintenance 1 (CRM1), plays important roles in the progress of tumorigenesis. However, the prognostic and therapeutic values of XPO1 in neuroblastoma have not been reported. Here, our results showed that overexpression of XPO1 was significantly associated with poor clinical characteristics and prognosis of neuroblastoma patients. The specific inhibitor of XPO1 suppressed neuroblastoma cell growth both in vitro and in vivo. Specifically, inhibition of XPO1 suppressed neuroblastoma cells proliferation and induced cell apoptosis by FOXO1 and RB1 nuclear accumulation in neuroblastoma through inhibiting PI3K/AKT pathway, and induced G0/G1 phase cell arrest by activating P53 function. Together, XPO1 is a promising prognostic indicator for neuroblastoma and a novel target for antitumor treatment by selective inhibitor verdinexor (KPT-335).
2021-08-18 | GSE163987 | GEO
Project description:Inducible MYCN-knockdown, followed by RNA-seq analysis in the MYCN-amplified neuroblastoma cell line IMR5-75, reveals profound time-dependent transcriptome changes. For modulation of MYCN levels, stable neuroblastoma cell models were used where MYCN can be downregulated via vector-based hairpin RNA induction upon addition of 1µg/ml tetracycline (IMR5-75-shMYCN. From cells treated either with tetracycline or solvent (ethanol), RNA was isolated at time points 6 hours, 12 hours and 24 hours. Experiments were done in duplicates. RNA was sequenced.
2016-09-08 | E-GEOD-80397 | biostudies-arrayexpress
Project description:XPO1 is frequently overexpressed in multiple hematological malignancies, highlighting the attractiveness of targeting XPO1 as a therapeutic strategy. However, the therapeutic potential of XPO1 inhibition in NKTL was still not well documented. Here, we demonstrated that XPO1 is highly expressed in NKTL and is correlated with poor prognosis, suggesting that XPO1 is a potential target in NKTL. In addition, we identified YY1 as a transcriptional factor that bound to XPO1 promoter to activate its expression. Functional studies revealed that pharmacological inhibition of XPO1 using selinexor effectively blocks CDK4/6-pRB-E2F-c-Myc signaling, resulting in cell cycle arrest and apoptosis in sensitive cells. Transcriptomic analysis identified that dysfunction in cell cycle machinery may contribute to selinexor resistance, as resistant cells restore the expression of cycle-related genes to evade cell death. High-throughput screening utilizing a panel of 130 cell cycle inhibitors identified CDK4/6 inhibitors as sensitizers to selinexor in resistant cells. Mechanistically, the combination of CDK4/6 inhibitors and selinexor led to an enhanced inhibition of pRB-E2F-c-Myc signaling. Additionally, compassionate use of selinexor in combination with chemotherapy (gemcitabine, oxaliplatin) in three Refectory/Relapsed (R/R) NKTL patients achieved favorable clinical outcomes. Our data unveil a novel mechanism by which XPO1 inhibition blocks CDK4/6-pRb-E2F-c-Myc signaling, providing a rationale for the combination of CDK4/6 with XPO1 inhibitors for NKTL treatment.
2025-05-13 | GSE230615 | GEO
Project description:PURPOSE The median overall survival (OS) of patients with high-risk myelodysplastic syndromes (MDS) refractory to hypomethylating agents is less than 6 months and there is no standard therapy for such patients. Preclinical studies have shown that inhibition of the nuclear export protein XPO1 causes nuclear accumulation of p53 and disruption of NF-κB signaling, both relevant targets for MDS. We therefore sought to determine the safety, efficacy, and potential molecular correlates of response to selinexor, an oral selective inhibitor of XPO1, in MDS. PATIENTS AND METHODS We report the results of a phase 2 clinical trial of selinexor in high-risk MDS patients refractory to hypomethylating agents. The primary endpoint was overall response rate (ORR) and secondary endpoints included safety, response duration, and OS. RESULTS In 19 evaluable patients, ORR was 32% (95% CI, 13-57) with an additional 42% (95% CI, 24-71) achieving stable disease (SD). Median OS was 9.6 months (95% CI, 8.5-17.1) with median follow-up of 2.1 years. Grade 3 or 4 adverse events (AEs) in the first 3 patients (thrombocytopenia [n=3] and hyponatremia [n=1]) led to dose reduction to 60mg flat dose twice-weekly for two weeks followed by one week off, resulting in significantly improved tolerability. The most frequent adverse event (AE) thereafter was grade 1 or 2 nausea, anorexia and fatigue. These and other AEs were manageable with supportive care implementation. The presence of an SF3B1 mutation was significantly associated with response to selinexor (p=0.02) and correlative studies suggest splicing alterations were induced by selinexor and affected inflammatory pathways such as NF-κB. CONCLUSIONS Selinexor is safe and tolerable in MDS when given at 60mg twice weekly for two weeks with one week off. Responses were enriched in SF3B1 mutated patients.
2020-11-26 | GSE141147 | GEO
Project description:XPO1 gene encodes exportin 1 (XPO1) that controls the nuclear export of cargo proteins and RNAs. Almost 25% of primary mediastinal B-cell lymphomas (PMBL) and classical Hodgkin lymphomas (cHL) cases harboured a recurrent XPO1 point mutation (NM_003400, chr2:g61718472C>T) resulting in the E571K modification within the hydrophobic groove of the protein, the site of cargo proteins binding. We investigated the functional impact of XPO1E571K mutation using cell lines having various XPO1 status. We first confirmed that the mutation was present both within the XPO1 mRNA and the corresponding protein. In the U2940 cell line having a wild-type (wt) XPO1 gene, we introduced the E571K mutation using several CRISPR-Cas9 strategies. Using a barcoding method to trace the mutation, we observed that the mutation gave no advantage in vitro. Indeed, the effects of XPO1E571K mutation were hidden by the presence of the XPO1 wt allele. Strikingly, XPO1E571K mutation never occurred as homozygous or hemizygous in our patients��������� cohort. We further showed that XPO1E571K mutation modified selinexor binding to XPO1 and in turn, its sensitivity to this drug. We concluded that the balance between the wild-type and the mutated allele of XPO1 is a key element in defining XPO1 functions and oncogenic properties.
2020-10-01 | PXD016916 | Pride
Project description:Inducible MYCN-knockdown, followed by RNA-seq analysis in the MYCN-amplified neuroblastoma cell line IMR5-75, reveals profound time-dependent transcriptome changes.
2016-09-08 | GSE80397 | GEO
Project description:Gene expression after treatment with Nutlin 3a (Nut) and Selinexor (Sel) in Neuroblastoma Cells RNA from NBAT1 knockdown and its respective control (Csh) SH-SY5Y cells after nutlin-3a (10 uM) or DMSO treatement were isolated and sequenced using BGI DNBseq. IMR32 cells were treated with either DMSO, Nut, Sel and with both Nul and Sel and RNA was isolated following treatemnet We observed that knowndown of the NBAT1 lncRNA in NB cells leads to perturbation of the P53 mediated gene expression. Combination treatment with with Nul and Sel in IMR32 cells leads to higher P53 mediated gene expression.
2020-12-23 | GSE137366 | GEO