Inhibiting neddylation with MLN4924 potentiates hypoxia-induced apoptosis of mouse type B spermatogonia GC-2 cells
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA1030935 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:Hypoxia, an inadequate supply of tissue oxygen tension, has been reported to induce apoptosis of spermatogenic cells and is associated with male infertility. Neddylation, a post-translational modification similar to ubiquitination, has been shown to be involved in the hypoxia stress response. However, the functions of neddylation in hypoxia-induced apoptosis of spermatogenic cells and its association with male infertility remain largely unexplored. In this study, aiming to explore the role of neddylation in male infertility, we used the specific neddylation inhibitor MLN4924 for treatment in mouse type B spermatogonia GC-2 cells. Our results showed that MLN4924 had no apparent effect on GC-2 cell apoptosis under normoxia, but significantly increased apoptotic cells under hypoxia. Transcriptomic analysis and qPCR assay confirmed that MLN4924 could suppress the expression of hypoxia target genes in GC-2 cells under hypoxia. In addition, MLN4924 could enhance the induction of intracellular and mitochondrial reactive oxygen species (ROS) under hypoxia. These results indicate that the neddylation inhibitor MLN4924 potentiates hypoxia-induced apoptosis of mouse type B spermatogonia GC-2 cells, and neddylation may play an important role in promoting spermatogenic cells to adapt to hypoxia stress.
2023-11-02 | GSE245989 | GEO
Project description:Malignant rhabdoid tumors (MRT) represent one of the most aggressive childhood malignancies. No effective treatment options are available, and prognosis is therefore dismal. Previous studies have demonstrated that tumor organoids capture the heterogeneity of patient tumors and can be used to predict patient therapy response. Here, we perform drug screening on patient-derived normal and tumor organoids to identify MRT-specific therapeutic vulnerabilities. We identify neddylation inhibitor MLN4924 as a potential therapeutic agent. Mechanistically, we find increased neddylation in MRT organoids and tissues and show that MLN4924 induces a cytotoxic response via upregulation of the unfolded protein response. Lastly, we demonstrate in vivo efficacy in an MRT PDX mouse model, in which single agent MLN4924 treatment significantly extends survival. Our study demonstrates that organoids can be used to find drugs selectively targeting tumor cells while leaving healthy cells unharmed and proposes neddylation inhibition as therapeutic strategy in MRT.
2021-06-24 | GSE178737 | GEO
Project description:MLN4924, also known as pevonedistat, is a small molecule inhibitor of NEDD8 activating enzyme (NAE), that inhibits the entire neddylation pathway. As the first-in-class neddylation inhibitor, MLN4924 is currently in Phase I/II clinical trials for anticancer application as a single agent or in combination with chemotherapeutic drugs. MLN4924 has shown impressive anticancer activity by inactivating Cullin-RING ligases (CRLs) to cause accumulation of tumor suppressor substrates. Whether MLN4924 regulates the RNA expression by modulating the levels of transcription factor/repressor remain elusive. In this study, we treated A549 lung cancer cells with MLN4924 at 0.25 or 0.5 µM for 8 or 24 hrs, respectively, followed by RNAseq analysis. Here we found that MLN4924 significantly decreases the SOX2 mRNA level. The mechanistic study revealed that MLN4924 inhibits FBXW2 E3 to cause MSX2 accumulation, which in turn transcriptionally represses SOX2, leading to suppression of stem cell property and sensitization of cancer cells to tamoxifen.
2019-09-14 | GSE134190 | GEO
Project description:Type II testicular germ cell tumors (TGCT) are the most prevalent tumors in young men. Patients suffering from cisplatin resistant TGCTs are facing very poor prognosis demanding novel therapeutic options. Neddylation is a known posttranslational modification mediating many important biological processes including tumorigenesis. Overactivation of neddylation pathway promotes carcinogenesis and tumor progression in various entities by inducing proteasomal degradation of tumor suppressors (e.g., p21, p27). We used a genome-scale CRISPR/Cas9 activation screen to identify cisplatin resistance factors. TGCT cell lines were treated with the neddylation inhibitor (MLN4924)/cisplatin/combination and investigated for changes in viability (XTT assay), apoptosis/cell cycle (flow cytometry) as well as in the transcriptome (3’mRNA sequencing). NAE1 overexpression was detected in cisplatin resistant colonies from the CRISPR screen. Inhibition of neddylation using MLN4924 increased cisplatin cytotoxicity in TGCT cell lines and sensitized cisplatin resistant cells towards cisplatin. Apoptosis, G2/M-phase cell cycle arrest, gH2A.X/P27 accumulation and mesoderm/endoderm differentiation was observed in TGCT cells while fibroblast cells were unaffected. We identified overactivation of neddylation as a factor for cisplatin resistance in TGCTs and highlighted the additive effect of NAE1 inhibition by MLN4924 in combination with cisplatin as a novel treatment option for TGCTs.
2023-03-20 | GSE216043 | GEO
Project description:Type II testicular germ cell tumors (TGCT) are the most prevalent tumors in young men. Patients suffering from cisplatin resistant TGCTs are facing very poor prognosis demanding novel therapeutic options. Neddylation is a known posttranslational modification mediating many important biological processes including tumorigenesis. Overactivation of neddylation pathway promotes carcinogenesis and tumor progression in various entities by inducing proteasomal degradation of tumor suppressors (e.g., p21, p27). We used a genome-scale CRISPR/Cas9 activation screen to identify cisplatin resistance factors. TGCT cell lines were treated with the neddylation inhibitor (MLN4924)/cisplatin/combination and investigated for changes in viability (XTT assay), apoptosis/cell cycle (flow cytometry) as well as in the transcriptome (3’mRNA sequencing). NAE1 overexpression was detected in cisplatin resistant colonies from the CRISPR screen. Inhibition of neddylation using MLN4924 increased cisplatin cytotoxicity in TGCT cell lines and sensitized cisplatin resistant cells towards cisplatin. Apoptosis, G2/M-phase cell cycle arrest, gH2A.X/P27 accumulation and mesoderm/endoderm differentiation was observed in TGCT cells while fibroblast cells were unaffected. We identified overactivation of neddylation as a factor for cisplatin resistance in TGCTs and highlighted the additive effect of NAE1 inhibition by MLN4924 in combination with cisplatin as a novel treatment option for TGCTs.
2023-03-20 | GSE225852 | GEO
Project description:The heart undergoes significant structural, metabolic, gene expression and functional alterations during the perinatal to postnatal transition. While recent studies have identified multiple epigenetic and transcriptional regulators of cardiac maturation, post-transcriptional mechanisms regulating this process remain poorly understood. Neddylation is a post-translational modification that conjugates a small ubiquitin-like protein, NEDD8, to protein substrates via an E1-E2-E3 enzymatic cascade. The goal of this study was to define the role of neddylation in perinatal cardiac development and cardiac maturation. Neddylation was inhibited in adult mouse hearts by cardiac-specific deletion of NAE1 gene, a regulatory subunit of NEDD8 E1 enzyme, or in neonatal cardiomyocytes (CMs) with a pharmacological neddylation inhibitor, MLN4924. The impact on cardiac transcriptome, metabolism, maturation and function was assessed. Mosaic deletion of NAE1 in ~40% neonatal CMs disrupted aspects of maturation, including transverse-tubule formation, cellular hypertrophy and fetal/adult isoform switching, whereas deletion of NAE1 in over 80% CMs led to rapid development of cardiomyopathy and heart failure. Transcriptome analysis demonstrated an association of metabolic derangement with immature cardiomyocyte signature. Biochemical, ultrastructural and metabolomics analyses confirmed downregulation of fatty acid and oxidative phosphorylation genes, deficits in fatty acid utilization, mitochondrial dysfunction, and significantly altered metabolic profiles in NAE1-deficient hearts or MLN4924-treated neonatal CMs. Mechanistically, we found that HIF1α, a transcription factor known to promote glycolysis and suppress oxidative metabolism, is a putative NEDD8 target. Inhibition of neddylation resulted in HIF1α accumulation and activation, which contributed to diminished fatty acid utilization. Taken together, we conclude that neddylation plays a crucial role in CM maturation and postnatal cardiac development through sustaining the glycolytic to oxidative metabolic switch in perinatal hearts.
2022-11-19 | GSE217964 | GEO
Project description:The cytosolic DNA sensor cyclic GMP-AMP (cGAMP) synthetase (cGAS) has emerged as a fundamental component fueling the anti-pathogen immunity. Because of its pivotal role in initiating innate immune response, the activity of cGAS must be tightly fine-tuned to maintain immune homeostasis in antiviral response. Here, we reported that neddylation modification was indispensable for appropriate cGAS-STING signaling activation. Blocking neddylation pathway using neddylation inhibitor MLN4924 substantially impaired the induction of type I interferon and proinflammatory cytokines, which was selectively dependent on Nedd8 E2 enzyme Ube2m. We further found that deficiency of the Nedd8 E3 ligase Rnf111 greatly attenuated DNA-triggered cGAS activation while not affecting cGAMP induced activation of STING, demonstrating that Rnf111 was the Nedd8 E3 ligase of cGAS. We further identified Lys231 and Lys421 as the key neddylation sites in human cGAS. Mechanistically, Rnf111 interacted with and polyneddylated cGAS, which in turn promoted its dimerization and enhanced the DNA-binding ability, leading to proper cGAS-STING pathway activation. In the same line, the Ube2m or Rnf111 deficiency mice exhibited severe defects in innate immune response and were susceptible to HSV-1 infection. Collectively, our study uncovered a vital role of the Ube2m-Rnf111 neddylation axis in promoting the activity of the cGAS-STING pathway and highlighted the importance of neddylation modification in antiviral defense.
2021-02-22 | PXD024088 | Pride
Project description:Glioblastoma is a highly aggressive and lethal brain tumor, with limited treatment options. Abnormal activation of the neddylation pathway is observed in glioblastoma, and the NEDD8-activating enzyme (NAE) inhibitor, MLN4924 was previously shown to be effective in glioblastoma cell line models. However, its effect has not been tested in patient-derived glioblastoma stem cells. Immunohistochemistry and public data were analyzed to determine whether NEDD8 pathway proteins are important in glioblastoma development and patient survival. The effects of MLN4924 were evaluated in 4 glioblastoma cell lines and 15 patient-derived glioblastoma stem cells using high content analysis. Immunoblot analysis assessed the NEDD8 pathway proteins and biomarkers. Whole transcriptome analysis identified pathways associated with MLN4924 sensitivity. NAE1 and UBA3 levels increased in glioblastoma patients; high NEDD8 levels were associated with poor clinical outcomes. Glioblastoma cell lines and patient-derived stem cells were highly susceptible to MLN4924, while normal human astrocytes were resistant. Genomic analyses indicated that MLN4924 sensitive cells exhibited enrichment of ERK and AKT signaling. We verified that MLN4924 inhibits ERK and AKT phosphorylation in MLN4924 sensitive cells. Our findings suggest that patient-derived glioblastoma stem cells in the context of ERK and AKT activation are sensitive and highly regulated by neddylation inhibition.
| EGAS00001004018 | EGA
Project description:Systemic lupus erythematosus (SLE) is an autoimmune disorder with systemic inflammation, autoantibody accumulation and organ damage. The abnormalities of double-negative (DN) T cells are considered as an important commander of SLE. Neddylation, an important type of protein post-translational modification (PTM), has been well-proved to regulate T cell-mediated immune response. However, the function of neddylation in SLE remains largely unexplored. Here, we reported that neddylation inactivation with MLN4924 or genetic abrogation of Ube2m in T cells prevented SLE development for decreased DN T cell accumulation. Further investigations revealed that inactivation of neddylation blocked Bim ubiquitination degradation and maintained Bim level in DN T cells, contributing to the apoptosis of the accumulated DN T cells for Fas mutation. Then double knockout (KO) lupus-prone mice (Ube2m-/-Bim-/-lpr) were generated and results showed that loss of Bim interrupted the improvement of DN T cell apoptosis and the consequential relieved lupus symptoms for Ube2m KO. Our findings identified that neddylation inactivation promoted Bim-mediated apoptosis of DN T cells and prevented lupus progress. Clinically, we also found the percentages of DN T cells were improved accompanied with reduced apoptosis of DN T cells in SLE patients. Moreover, the neddylation of Cullin1 was higher while Bim level was decreased in SLE patients compared with healthy control. Meantime, the inhibition of neddylation induced Bim-dependent apoptosis of DN T cells isolated from SLE patients. Together, these findings provide the first evidence of the neddylation role in lupus development, suggesting a novel therapeutic strategy for lupus.
2024-01-26 | PXD045686 | Pride