Protein Arginine Methyltransferase 1 is therapeutic vulnerability in Multiple Myeloma
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA983271 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR24910173_1.fastq.gz | Fastqsanger.gz | |||
| SRR24910173_2.fastq.gz | Fastqsanger.gz | |||
| SRR24910174_1.fastq.gz | Fastqsanger.gz | |||
| SRR24910174_2.fastq.gz | Fastqsanger.gz | |||
| SRR24910175_1.fastq.gz | Fastqsanger.gz |
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Project description:Multiple myeloma (MM) is a devastating plasma cell malignancy characterized by the expansion of aberrant monoclonal plasma cells in the bone marrow, leading to severe clinical manifestations and poor prognosis, particularly in relapsed/refractory cases. Identifying novel therapeutic targets is crucial to improve treatment outcomes in these patients. In this study, we investigated the role of protein arginine methyltransferase 1 (PRMT1) in MM pathogenesis and explored its potential as a therapeutic target. We observed that PRMT1, responsible for majority of asymmetric di-methylation in cells, exhibited the highest expression among PRMT family members in MM cell lines and primary MM cells. Importantly, PRMT1 expression was significantly elevated in relapsed/refractory patients compared to newly diagnosed patients. High expression of PRMT1 expression was strongly associated with poor prognosis. We found that genetic or enzymatic inhibition of PRMT1 impaired MM cell growth, induced cell cycle arrest, and triggered cell death. Treatment with MS023, a potent PRMT type I inhibitor, demonstrated a robust inhibitory effect on viability of primary cells isolated from both newly diagnosed and proteasome inhibitor-relapsed/refractory patients in a dose-dependent manner. In vivo studies using a xenograft model revealed that targeting PRMT1 by either CRISPR/Cas9-mediated knockout or MS023 treatment significantly attenuated MM tumor growth and prolonged the survival of tumor-bearing mice. Histological analysis further confirmed increased apoptotic cell death in MS023-treated tumors. Collectively, our findings establish PRMT1 as an indispensable and novel therapeutic vulnerability in MM. The elevated expression of PRMT1 in relapsed/refractory patients underscores its potential as a target for overcoming treatment resistance. Moreover, our results highlight the efficacy of MS023 as a promising therapeutic agent against MM, offering new avenues for therapeutic approaches in relapsed/refractory MM.
2023-06-16 | GSE234807 | GEO
Project description:Resistance to proteasome inhibitors (PIs) is a ubiquitous clinical concern in multiple myeloma. We proposed that signaling-level responses after PI would reveal new means to enhance efficacy. Unbiased phosphoproteomics after the PI carfilzomib surprisingly demonstrated the most prominent phosphorylation changes on spliceosome components. Spliceosome modulation was invisible to RNA or protein abundance alone. Transcriptome analysis demonstrated broad-scale intron retention suggestive of PI-specific splicing interference. Direct spliceosome inhibition synergized with carfilzomib and showed potent anti-myeloma activity. Functional genomics and exome sequencing further supported the spliceosome as a specific vulnerability in myeloma. Our results propose splicing interference as an unrecognized modality of PI mechanism, reveal additional modes of spliceosome modulation, and suggest spliceosome targeting as a promising therapeutic strategy in myeloma.
2020-02-21 | PXD012172 | Pride
Project description:Multiple myeloma is an incurable hematological malignancy evolving from precursor states to advanced phases of the disease. MYC abnormalities play a critical role in the disease progression. Nevertheless, MYC lacks therapeutic drugability, thereby necessitating the exploration of alternative strategies aimed at circumventing the challenges associated with targeting MYC. In this study, we hypothesized that MYC upregulation induces genomic dependencies in tumor cells, creating vulnerabilities that can be exploited therapeutically. We discovered a differential dependency on glutamine metabolism in MYC overexpressing cells. We functionally explored these dependencies as a selective targetable vulnerability in vitro and in vivo. Furthermore, we uncovered a potential synergistic combination that can exacerbated this metabolic vulnerability, Collectively, our in vitro and in vivo results revealed an effective therapeutic combinatory strategy in the context of MYC overexpressing MM.
2024-04-09 | PXD050010 | Pride
Project description:Arginine methyltransferases critically regulate cellular homeostasis by modulating the functional outcome of their substrates. The protein arginine methyltransferase 5 (PRMT5) is an enzyme involved in growth and survival pathways promoting tumorigenesis. However, little is known about the biologic function of PRMT5 and its therapeutic potential in multiple myeloma (MM). In the present study, we identified and validated PRMT5 as a new therapeutic target in MM. PRMT5 is overexpressed in patient MM cells and associated with decreased progression free survival and overall survival. Either genetic knockdown or pharmacological inhibition of PRMT5 with the inhibitor EPZ015666 significantly inhibited growth of both cell lines and patient MM cells. Furthermore, PRMT5 inhibition abrogated NF-kB signaling. Interestingly, mass spectrometry identified a tripartite motif-containing protein 21 TRIM-21 as a new PRMT5-partner, and we delineated a TRIM21-dependent mechanism of NF-kB inhibition. Importantly, oral administration of EPZ015666 significantly decreased MM growth in a humanized murine model of MM. These data both demonstrate the oncogenic role and prognostic relevance of PRMT5 in MM pathogenesis, and provide the rationale for novel therapies targeting PRMT5 to improve patient outcome.
2017-09-19 | GSE103966 | GEO
Project description:Multiple myeloma is an incurable hematological malignancy evolving from precursor states to advanced phases of the disease. MYC abnormalities play a critical role in the disease progression. Nevertheless, MYC lacks therapeutic drugability, thereby necessitating the exploration of alternative strategies aimed at circumventing the challenges associated with targeting MYC. In this study, we hypothesized that MYC upregulation induces genomic dependencies in tumor cells, creating vulnerabilities that can be exploited therapeutically. We discovered a differential dependency on glutamine metabolism in MYC overexpressing cells. We functionally explored these dependencies as a selective targetable vulnerability in vitro and in vivo. Furthermore, we uncovered a potential synergistic combinations that can exacerbated this metabolic vulnerability, Collectively, our in vitro and in vivo results revealed an effective therapeutic combinatory strategy in the context of MYC overexpressing MM.
2023-09-04 | GSE241948 | GEO
Project description:Serine synthesis is crucial for tumor growth and survival, but its regulatory mechanism in cancer remains elusive. Here, using integrative metabolomics and transcriptomics analyses, we show a heterogeneity between metabolite and transcript profiles. Specifically, the level of serine in HCC tissues is increased, whereas the expression of phosphoglycerate dehydrogenase (PHGDH), the first rate-limiting enzyme in serine biosynthesis pathway, is dramatically downregulated. Interestingly, the increased serine level is obtained by enhanced PHGDH catalytic activity due to protein arginine methyltransferase 1 (PRMT1)-mediated methylation of PHGDH at arginine 236. PRMT1-mediated PHGDH methylation and activation potentiates serine synthesis, ameliorates oxidative stress, and promotes HCC growth in vitro and in vivo. FBXO7, an E3 ubiquitin ligase which is downregulated in human HCC tissues, ubiquitinates and downregulates PRMT1 to suppress PHGDH methylation and serine synthesis, leading to the inhibition of HCC cell growth. Furthermore, PRMT1-mediated PHGDH methylation correlates with PHGDH hyperactivation and serine accumulation in human HCC tissues, and is predictive of poor prognosis of HCC patients. Notably, blocking PHGDH methylation with a TAT-tagged non-methylated peptide inhibits serine synthesis and restrains HCC growth, both in an HCC patient-derived xenograft (PDX) model and subcutaneous HCC cell-derived xenograft model. Overall, our findings reveal a novel regulatory mechanism of PHGDH activity and serine synthesis, and suggest PHGDH methylation as a potential therapeutic vulnerability in HCC.
2022-07-11 | GSE207435 | GEO
Project description:The urea cycle is frequently rewired in cancer cells to meet the metabolic demands of cancer, yet our understanding about the regulatory mechanisms for this pathway in different types of cancer is very limited. In this study, we discover that oncogenic activation of KRAS in non-small cell lung cancer (NSCLC) silences the expression of arginosuccinate synthase 1 (ASS1), a urea cycle enzyme catalyzing the production of arginine from aspartate and citrulline, and thereby diverts the utilization of aspartate to pyrimidine synthesis to meet the high demand for DNA replication in KRAS-mutant NSCLC. Specifically, KRAS signaling facilitates a hypo-acetylated state in the promoter region of ASS1 gene in a histone deacetylase 3 (HDAC3)-dependent manner, which in turn impedes the recruitment of the transcription factor c-MYC for ASS1 transcription. ASS1 suppression in KRAS-mutant NSCLC cancer cells impairs the biosynthesis of arginine and renders growth dependency on SLC7A1, an arginine transmembrane transport, to import extracellular arginine. Depletion of SLC7A1 in both patient-derived organoid and xenograft models obtains a substantial therapeutic benefit in inhibiting KRAS-driven NSCLC growth. Together, our findings uncover a new role of oncogenic KRAS in rewiring urea cycle metabolism and identify SLC7A1-mediated arginine uptake as a therapeutic vulnerability in treating KRAS-mutant NSCLC.
2024-01-20 | GSE253688 | GEO
Project description:Multiple myeloma is characterized by frequent chromosomal alterations. Protein Arginine Methyltransferase 5 (PRMT5) catalyzes symmetric dimethylation of arginine, a post-translational modification involved in cancer and embryonic development. We sought to functionally validate the role of PRMT5 and delineate their downstream target genes in MM. Using “sponge” lentiviral vectors to knock down PRMT5 in vitro and in vivo, we have documented enhanced apoptosis and descend proliferation of MM cells compared with control lentivirus sponge . Expression profiling analysis of PRMT5-deficient cells identified a large number of downstream target genes, which provides a valuable tool to investigate their function in MM pathogenesis and their potential use as therapeutic targets.
2020-12-06 | GSE162715 | GEO
Project description:MYC dependency in GLS1 and NAMPT is a therapeutic vulnerability in multiple myeloma
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