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Singh S, Fang J, Jin H, Van de Velde LA, Wu Q, Cortes A, Morton CL, Woolard MA, Quarni W, Steele JA, Connelly JP, He L, Thorne R, Turner G, Confer T, Johnson M, Caufield WV, Freeman BB, Lockey T, Pruett-Miller SM, Wang R, Davidoff AM, Thomas PG, Yang J. RBM39 degrader invigorates natural killer cells to eradicate neuroblastoma despite cancer cell plasticity. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.03.21.586157. [PMID: 38585889 PMCID: PMC10996557 DOI: 10.1101/2024.03.21.586157] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/09/2024]
Abstract
The cellular plasticity of neuroblastoma is defined by a mixture of two major cell states, adrenergic (ADRN) and mesenchymal (MES), which may contribute to therapy resistance. However, how neuroblastoma cells switch cellular states during therapy remains largely unknown and how to eradicate neuroblastoma regardless of their cell states is a clinical challenge. To better understand the lineage switch of neuroblastoma in chemoresistance, we comprehensively defined the transcriptomic and epigenetic map of ADRN and MES types of neuroblastomas using human and murine models treated with indisulam, a selective RBM39 degrader. We showed that cancer cells not only undergo a bidirectional switch between ADRN and MES states, but also acquire additional cellular states, reminiscent of the developmental pliancy of neural crest cells. The lineage alterations are coupled with epigenetic reprogramming and dependency switch of lineage-specific transcription factors, epigenetic modifiers and targetable kinases. Through targeting RNA splicing, indisulam induces an inflammatory tumor microenvironment and enhances anticancer activity of natural killer cells. The combination of indisulam with anti-GD2 immunotherapy results in a durable, complete response in high-risk transgenic neuroblastoma models, providing an innovative, rational therapeutic approach to eradicate tumor cells regardless of their potential to switch cell states.
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Deng Z, Richardson DR. The Myc Family and the Metastasis Suppressor NDRG1: Targeting Key Molecular Interactions with Innovative Therapeutics. Pharmacol Rev 2023; 75:1007-1035. [PMID: 37280098 DOI: 10.1124/pharmrev.122.000795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2022] [Revised: 03/07/2023] [Accepted: 05/01/2023] [Indexed: 06/08/2023] Open
Abstract
Cancer is a leading cause of death worldwide, resulting in ∼10 million deaths in 2020. Major oncogenic effectors are the Myc proto-oncogene family, which consists of three members including c-Myc, N-Myc, and L-Myc. As a pertinent example of the role of the Myc family in tumorigenesis, amplification of MYCN in childhood neuroblastoma strongly correlates with poor patient prognosis. Complexes between Myc oncoproteins and their partners such as hypoxia-inducible factor-1α and Myc-associated protein X (MAX) result in proliferation arrest and pro-proliferative effects, respectively. Interactions with other proteins are also important for N-Myc activity. For instance, the enhancer of zest homolog 2 (EZH2) binds directly to N-Myc to stabilize it by acting as a competitor against the ubiquitin ligase, SCFFBXW7, which prevents proteasomal degradation. Heat shock protein 90 may also be involved in N-Myc stabilization since it binds to EZH2 and prevents its degradation. N-Myc downstream-regulated gene 1 (NDRG1) is downregulated by N-Myc and participates in the regulation of cellular proliferation via associating with other proteins, such as glycogen synthase kinase-3β and low-density lipoprotein receptor-related protein 6. These molecular interactions provide a better understanding of the biologic roles of N-Myc and NDRG1, which can be potentially used as therapeutic targets. In addition to directly targeting these proteins, disrupting their key interactions may also be a promising strategy for anti-cancer drug development. This review examines the interactions between the Myc proteins and other molecules, with a special focus on the relationship between N-Myc and NDRG1 and possible therapeutic interventions. SIGNIFICANCE STATEMENT: Neuroblastoma is one of the most common childhood solid tumors, with a dismal five-year survival rate. This problem makes it imperative to discover new and more effective therapeutics. The molecular interactions between major oncogenic drivers of the Myc family and other key proteins; for example, the metastasis suppressor, NDRG1, may potentially be used as targets for anti-neuroblastoma drug development. In addition to directly targeting these proteins, disrupting their key molecular interactions may also be promising for drug discovery.
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Affiliation(s)
- Zhao Deng
- Centre for Cancer Cell Biology and Drug Discovery, Griffith Institute for Drug Discovery, Griffith University, Nathan, Australia (Z.D., D.R.R.), and Department of Pathology and Biological Responses, Nagoya University Graduate School of Medicine, Nagoya, Japan (D.R.R.)
| | - Des R Richardson
- Centre for Cancer Cell Biology and Drug Discovery, Griffith Institute for Drug Discovery, Griffith University, Nathan, Australia (Z.D., D.R.R.), and Department of Pathology and Biological Responses, Nagoya University Graduate School of Medicine, Nagoya, Japan (D.R.R.)
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A Drug Repurposing Screen Identifies Fludarabine Phosphate as a Potential Therapeutic Agent for N-MYC Overexpressing Neuroendocrine Prostate Cancers. Cells 2022; 11:cells11142246. [PMID: 35883689 PMCID: PMC9317991 DOI: 10.3390/cells11142246] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Revised: 07/08/2022] [Accepted: 07/16/2022] [Indexed: 02/07/2023] Open
Abstract
Neuroendocrine prostate cancer (NEPC) represents a highly aggressive form of prostate tumors. NEPC results from trans-differentiated castration-resistant prostate cancer (CRPC) with increasing evidence indicating that the incidence of NEPC often results from the adaptive response to androgen deprivation therapy. Recent studies have shown that a subset of NEPC exhibits overexpression of the MYCN oncogene along with the loss of tumor suppressing TP53 and RB1 activities. N-MYC is structurally disordered with no binding pockets available on its surface and so far, no clinically approved drug is available. We adopted a drug-repurposing strategy, screened ~1800 drug molecules, and identified fludarabine phosphate to preferentially inhibit the proliferation of N-MYC overexpressing NEPC cells by inducing reactive oxygen species (ROS). We also show that fludarabine phosphate affects N-MYC protein levels and N-MYC transcriptional targets in NEPC cells. Moreover, enhanced ROS production destabilizes N-MYC protein by inhibiting AKT signaling and is responsible for the reduced survival of NEPC cells and tumors. Our results indicate that increasing ROS production by the administration of fludarabine phosphate may represent an effective treatment option for patients with N-MYC overexpressing NEPC tumors.
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Guo YF, Duan JJ, Wang J, Li L, Wang D, Liu XZ, Yang J, Zhang HR, Lv J, Yang YJ, Yang ZY, Cai J, Liao XM, Tang T, Huang TT, Wu F, Yang XY, Wen Q, Bian XW, Yu SC. Inhibition of the ALDH18A1-MYCN positive feedback loop attenuates MYCN-amplified neuroblastoma growth. Sci Transl Med 2021; 12:12/531/eaax8694. [PMID: 32075946 DOI: 10.1126/scitranslmed.aax8694] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Accepted: 01/28/2020] [Indexed: 12/14/2022]
Abstract
MYCN-amplified neuroblastoma (NB) is characterized by poor prognosis, and directly targeting MYCN has proven challenging. Here, we showed that aldehyde dehydrogenase family 18 member A1 (ALDH18A1) exerts profound impacts on the proliferation, self-renewal, and tumorigenicity of NB cells and is a potential risk factor in patients with NB, especially those with MYCN amplification. Mechanistic studies revealed that ALDH18A1 could both transcriptionally and posttranscriptionally regulate MYCN expression, with MYCN reciprocally transactivating ALDH18A1 and thus forming a positive feedback loop. Using molecular docking and screening, we identified an ALDH18A1-specific inhibitor, YG1702, and demonstrated that pharmacological inhibition of ALDH18A1 was sufficient to induce a less proliferative phenotype and confer tumor regression and prolonged survival in NB xenograft models, providing therapeutic insights into the disruption of this reciprocal regulatory loop in MYCN-amplified NB.
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Affiliation(s)
- Yu-Feng Guo
- Department of Stem Cell and Regenerative Medicine, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China.,Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China.,Key Laboratory of Tumor Immunopathology of the Ministry of Education, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Jiang-Jie Duan
- Department of Stem Cell and Regenerative Medicine, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China.,Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China.,Key Laboratory of Tumor Immunopathology of the Ministry of Education, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Jun Wang
- Department of Stem Cell and Regenerative Medicine, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China.,Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China.,Key Laboratory of Tumor Immunopathology of the Ministry of Education, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Lin Li
- Department of Stem Cell and Regenerative Medicine, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China.,Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China.,Key Laboratory of Tumor Immunopathology of the Ministry of Education, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Di Wang
- Department of Stem Cell and Regenerative Medicine, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China.,Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China.,Key Laboratory of Tumor Immunopathology of the Ministry of Education, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Xun-Zhou Liu
- Department of Stem Cell and Regenerative Medicine, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China.,Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Jing Yang
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China.,Key Laboratory of Tumor Immunopathology of the Ministry of Education, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Hua-Rong Zhang
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China.,Key Laboratory of Tumor Immunopathology of the Ministry of Education, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Jing Lv
- Department of Stem Cell and Regenerative Medicine, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China.,Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China.,Key Laboratory of Tumor Immunopathology of the Ministry of Education, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Yong-Jun Yang
- Department of Stem Cell and Regenerative Medicine, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China.,Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China.,Key Laboratory of Tumor Immunopathology of the Ministry of Education, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Ze-Yu Yang
- Department of Stem Cell and Regenerative Medicine, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China.,Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China.,Key Laboratory of Tumor Immunopathology of the Ministry of Education, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Jiao Cai
- Department of Stem Cell and Regenerative Medicine, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China.,Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China.,Key Laboratory of Tumor Immunopathology of the Ministry of Education, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Xue-Mei Liao
- Department of Stem Cell and Regenerative Medicine, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China.,Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China.,Key Laboratory of Tumor Immunopathology of the Ministry of Education, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Tao Tang
- Department of Stem Cell and Regenerative Medicine, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China.,Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China.,Key Laboratory of Tumor Immunopathology of the Ministry of Education, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Ting-Ting Huang
- Department of Stem Cell and Regenerative Medicine, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China.,Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China.,Key Laboratory of Tumor Immunopathology of the Ministry of Education, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Feng Wu
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China.,Key Laboratory of Tumor Immunopathology of the Ministry of Education, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Xian-Yan Yang
- Department of Stem Cell and Regenerative Medicine, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China.,Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China.,Key Laboratory of Tumor Immunopathology of the Ministry of Education, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Qian Wen
- Department of Stem Cell and Regenerative Medicine, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China.,Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China.,Key Laboratory of Tumor Immunopathology of the Ministry of Education, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Xiu-Wu Bian
- Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China. .,Key Laboratory of Tumor Immunopathology of the Ministry of Education, Third Military Medical University (Army Medical University), Chongqing 400038, China
| | - Shi-Cang Yu
- Department of Stem Cell and Regenerative Medicine, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China. .,Institute of Pathology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing 400038, China.,Key Laboratory of Tumor Immunopathology of the Ministry of Education, Third Military Medical University (Army Medical University), Chongqing 400038, China
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Liu R, Shi P, Wang Z, Yuan C, Cui H. Molecular Mechanisms of MYCN Dysregulation in Cancers. Front Oncol 2021; 10:625332. [PMID: 33614505 PMCID: PMC7886978 DOI: 10.3389/fonc.2020.625332] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Accepted: 12/18/2020] [Indexed: 12/17/2022] Open
Abstract
MYCN, a member of MYC proto-oncogene family, encodes a basic helix-loop-helix transcription factor N-MYC. Abnormal expression of N-MYC is correlated with high-risk cancers and poor prognosis. Initially identified as an amplified oncogene in neuroblastoma in 1983, the oncogenic effect of N-MYC is expanded to multiple neuronal and nonneuronal tumors. Direct targeting N-MYC remains challenge due to its "undruggable" features. Therefore, alternative therapeutic approaches for targeting MYCN-driven tumors have been focused on the disruption of transcription, translation, protein stability as well as synthetic lethality of MYCN. In this review, we summarize the latest advances in understanding the molecular mechanisms of MYCN dysregulation in cancers.
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Affiliation(s)
- Ruochen Liu
- State Key Laboratory of Silkworm Genome Biology, College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing, China
- Cancer Center, Reproductive Medicine Center, Medical Research Institute, Southwest University, Chongqing, China
- NHC Key Laboratory of Birth Defects and Reproductive Health (Chongqing Key Laboratory of Birth Defects and Reproductive Health, Chongqing Population and Family Planning Science and Technology Research Institute), Chongqing, China
| | - Pengfei Shi
- State Key Laboratory of Silkworm Genome Biology, College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing, China
- Cancer Center, Reproductive Medicine Center, Medical Research Institute, Southwest University, Chongqing, China
- NHC Key Laboratory of Birth Defects and Reproductive Health (Chongqing Key Laboratory of Birth Defects and Reproductive Health, Chongqing Population and Family Planning Science and Technology Research Institute), Chongqing, China
| | - Zhongze Wang
- State Key Laboratory of Silkworm Genome Biology, College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing, China
- Cancer Center, Reproductive Medicine Center, Medical Research Institute, Southwest University, Chongqing, China
| | - Chaoyu Yuan
- State Key Laboratory of Silkworm Genome Biology, College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing, China
- Cancer Center, Reproductive Medicine Center, Medical Research Institute, Southwest University, Chongqing, China
| | - Hongjuan Cui
- State Key Laboratory of Silkworm Genome Biology, College of Sericulture, Textile and Biomass Sciences, Southwest University, Chongqing, China
- Cancer Center, Reproductive Medicine Center, Medical Research Institute, Southwest University, Chongqing, China
- NHC Key Laboratory of Birth Defects and Reproductive Health (Chongqing Key Laboratory of Birth Defects and Reproductive Health, Chongqing Population and Family Planning Science and Technology Research Institute), Chongqing, China
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Synergism of Proneurogenic miRNAs Provides a More Effective Strategy to Target Glioma Stem Cells. Cancers (Basel) 2021; 13:cancers13020289. [PMID: 33466745 PMCID: PMC7831004 DOI: 10.3390/cancers13020289] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 01/08/2021] [Accepted: 01/11/2021] [Indexed: 12/16/2022] Open
Abstract
Simple Summary miRNAs function as critical regulators of gene expression and have been defined as contributors of cancer phenotypes by acting as oncogenes or tumor suppressors. Based on these findings, miRNA-based therapies have been explored in the treatment of many different malignancies. The use of single miRNAs has faced some challenges and showed limited success. miRNAs cooperate to regulate distinct biological processes and pathways and, therefore, combination of related miRNAs could amplify the repression of oncogenic factors and the effect on cancer relevant pathways. We established that the combination of tumor suppressor miRNAs miR-124, miR-128, and miR-137 is much more effective than single miRNAs in disrupting proliferation and survival of glioma stem cells and neuroblastoma lines and promoting differentiation and response to radiation. Subsequent genomic analyses showed that other combinations of tumor suppressor miRNAs could be equally effective, and its use could provide new routes to target in special cancer-initiating cell populations. Abstract Tumor suppressor microRNAs (miRNAs) have been explored as agents to target cancer stem cells. Most strategies use a single miRNA mimic and present many disadvantages, such as the amount of reagent required and the diluted effect on target genes. miRNAs work in a cooperative fashion to regulate distinct biological processes and pathways. Therefore, we propose that miRNA combinations could provide more efficient ways to target cancer stem cells. We have previously shown that miR-124, miR-128, and miR-137 function synergistically to regulate neurogenesis. We used a combination of these three miRNAs to treat glioma stem cells and showed that this treatment was much more effective than single miRNAs in disrupting cell proliferation and survival and promoting differentiation and response to radiation. Transcriptomic analyses indicated that transcription regulation, angiogenesis, metabolism, and neuronal differentiation are among the main biological processes affected by transfection of this miRNA combination. In conclusion, we demonstrated the value of using combinations of neurogenic miRNAs to disrupt cancer phenotypes and glioma stem cell growth. The synergistic effect of these three miRNA amplified the repression of oncogenic factors and the effect on cancer relevant pathways. Future therapeutic approaches would benefit from utilizing miRNA combinations, especially when targeting cancer-initiating cell populations.
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Tange R, Tomatsu T, Sato T. Transcription of human β4-galactosyltransferase 3 is regulated by differential DNA binding of Sp1/Sp3 in SH-SY5Y human neuroblastoma and A549 human lung cancer cell lines. Glycobiology 2019; 29:211-221. [PMID: 30561605 DOI: 10.1093/glycob/cwy109] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 12/02/2018] [Accepted: 12/17/2018] [Indexed: 12/28/2022] Open
Abstract
Poor prognosis of neuroblastoma patients has been shown to be associated with increased expression of β4-galactosyltransferase (β4GalT) 3. To address the underlying mechanism of the increased expression of β4GalT3, the transcriptional regulation of the human β4GalT3 gene was investigated in SH-SY5Y human neuroblastoma cell line comparing with A549 human lung cancer cell line, in which the β4GalT3 gene expression was the lowest among four cancer cell lines examined. The core promoter region was identified between nucleotides -69 and -6 relative to the transcriptional start site, and the same region was utilized in both cell lines. The promoter region contained two Specificity protein (Sp)1/3-binding sites at nucleotide positions -39/-30 and -19/-10, and the sites were crucial for the promoter activity. Although the gene expression of Sp family transcription factors Sp1 and Sp3 was comparable in each cell line, Sp3 bound to the promoter region in SH-SY5Y cells whereas Sp1 bound to the region in A549 cells. The promoter activities were enhanced by Sp1 and Sp3 in SH-SY5Y cells. In contrast, the promoter activities were enhanced by Sp1 but reduced by Sp3 in A549 cells. Furthermore, the function of each Sp1/3-binding site differed between SH-SY5Y and A549 cells due to the differential binding of Sp1/Sp3. These findings suggest that the transcription of the β4GalT3 gene is regulated by differential DNA binding of Sp3 and Sp1 in neuroblastoma and lung cancer. The increased expression of β4GalT3 in neuroblastoma may be ascribed to the enhanced expression of Sp3, which is observed for various cancers.
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Affiliation(s)
- Riho Tange
- Laboratory of Glycobiology, Department of Bioengineering, Nagaoka University of Technology, Nagaoka, Niigata, Japan
| | - Takuya Tomatsu
- Laboratory of Glycobiology, Department of Bioengineering, Nagaoka University of Technology, Nagaoka, Niigata, Japan
| | - Takeshi Sato
- Laboratory of Glycobiology, Department of Bioengineering, Nagaoka University of Technology, Nagaoka, Niigata, Japan
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Taoka R, Jinesh GG, Xue W, Safe S, Kamat AM. CF 3DODA-Me induces apoptosis, degrades Sp1, and blocks the transformation phase of the blebbishield emergency program. Apoptosis 2017; 22:719-729. [PMID: 28283889 DOI: 10.1007/s10495-017-1359-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Cancer stem cells are capable of undergoing cellular transformation after commencement of apoptosis through the blebbishield emergency program in a VEGF-VEGFR2-dependent manner. Development of therapeutics targeting the blebbishield emergency program would thus be important in cancer therapy. Specificity protein 1 (Sp1) orchestrates the transcription of both VEGF and VEGFR2; hence, Sp1 could act as a therapeutic target. Here, we demonstrate that CF3DODA-Me induced apoptosis, degraded Sp1, inhibited the expression of multiple drivers of the blebbishield emergency program such as VEGFR2, p70S6K, and N-Myc through activation of caspase-3, inhibited reactive oxygen species; and inhibited K-Ras activation to abolish transformation from blebbishields as well as transformation in soft agar. These findings confirm CF3DODA-Me as a potential therapeutic candidate that can induce apoptosis and block transformation from blebbishields.
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Affiliation(s)
- Rikiya Taoka
- Department of Urology, Unit 1373, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX, 77030, USA
| | - Goodwin G Jinesh
- Department of Urology, Unit 1373, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX, 77030, USA.
| | - Wenrui Xue
- Department of Urology, Unit 1373, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX, 77030, USA
| | - Stephen Safe
- Department of Veterinary Physiology and Pharmacology, Texas A&M University, College Station, TX, USA
| | - Ashish M Kamat
- Department of Urology, Unit 1373, The University of Texas MD Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX, 77030, USA.
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Kelner MJ, Diccianni MB, Yu AL, Rutherford MR, Estes LA, Morgenstern R. Absence of MGST1 mRNA and protein expression in human neuroblastoma cell lines and primary tissue. Free Radic Biol Med 2014; 69:167-71. [PMID: 24486338 PMCID: PMC4010302 DOI: 10.1016/j.freeradbiomed.2014.01.021] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Revised: 12/13/2013] [Accepted: 01/21/2014] [Indexed: 12/01/2022]
Abstract
A recent study identified a haplotype on a small region of chromosome 12, between markers D12S1725 and D12S1596, shared by all patients with familial neuroblastoma (NB). We previously localized the human MGST1 gene, whose gene product protects against oxidative stress, to this very same chromosomal region (12p112.1-p13.33). Owing to the chromosomal location of MGST1; its roles in tumorigenesis, drug resistance, and oxidative stress; and the known sensitivity of NB cell lines to oxidative stress, we considered a role for MGST1 in NB development. Surprisingly there was no detectable MGST1 mRNA or protein in either NB cell lines or NB primary tumor tissue, although all other human tissues, cell lines, and primary tumor tissue examined to date express MGST1 at high levels. The mechanism behind the failure of NB cells and tissue to express MGST1 mRNA is unknown and involves the failure of MGST1 pre-mRNA expression, but does not involve chromosomal rearrangement or nucleotide variation in the promoter, exons, or 3' untranslated region of MGST1. MGST1 provides significant protection against oxidative stress and constitutes 4 to 6% of all protein in the outer membrane of the mitochondria. As NB cells are extremely sensitive to oxidative stress, and often used as a model system to investigate mitochondrial response to endogenous and exogenous stress, these findings may be due to the lack of expression MGST1 protein in NB. The significance of this finding to the development of neuroblastoma (familial or otherwise), however, is unknown and may even be incidental. Although our studies provide a molecular basis for previous work on the sensitivity of NB cells to oxidative stress, and possibly marked variations in NB mitochondrial homeostasis, they also imply that the results of these earlier studies using NB cells are not transferable to other tumor and cell types that express MGST1 at high concentrations.
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Affiliation(s)
- Michael J Kelner
- Department of Pathology, University of California at San Diego, La Jolla, CA 92039, USA.
| | - Mitchell B Diccianni
- Department of Pediatrics, University of California at San Diego, La Jolla, CA 92039, USA
| | - Alice L Yu
- Department of Pediatrics, University of California at San Diego, La Jolla, CA 92039, USA; Genomics Research Center, Academia Sinica, Taipei 115, Taiwan
| | - Mary R Rutherford
- Department of Pathology, University of California at San Diego, La Jolla, CA 92039, USA
| | - Leita A Estes
- Department of Pathology, University of California at San Diego, La Jolla, CA 92039, USA
| | - Ralf Morgenstern
- Institute of Environmental Medicine, Karolinska Institutet, SE-17177 Stockholm, Sweden
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10
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Lucchese A, Serpico R. Effect of SP3 silencing on cytokeratin expression pattern in HPV-positive cells. Int J Immunopathol Pharmacol 2009; 22:163-8. [PMID: 19309563 DOI: 10.1177/039463200902200118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
In an attempt to understand the molecular factors underlying squamous cell carcinogenesis in HPV-infected oral and cervical tissues, we examined the Sp3-dependent cytokeratin expression in HPV-positive CaSki cells. Two sets of cytokeratins were examined: the simple epithelial CK 7, 8, 18, 19, and 20, which are generally expressed in simple epithelia and CK4, 10, 13, and 17, which are expressed in squamous epithelia. Two additional CK pairs, i.e. CK6/CK16 and CK4/CK13 were analyzed as controls of the proliferation/differentiation cell status, respectively. We report that Sp3 gene silencing specifically hits CK18 and CK19, which are markers of oral and cervical squamous tumors. These data may be of help in immunopathological definition of squamous carcinogenesis.
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Affiliation(s)
- A Lucchese
- Department of Odontostomatology, Orthodontics and Surgical Disciplines, University of Naples (SUN), Naples, Italy.
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Kanemaru KK, Tuthill MC, Takeuchi KK, Sidell N, Wada RK. Retinoic acid induced downregulation of MYCN is not mediated through changes in Sp1/Sp3. Pediatr Blood Cancer 2008; 50:806-11. [PMID: 17554788 DOI: 10.1002/pbc.21273] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
BACKGROUND Use of retinoic acid (RA) has become the standard of care in the treatment of high risk neuroblastoma (NB). In vitro, RA induces growth arrest and differentiation, an effect that likely underlies its activity in the clinical setting. An important event in differentiation is the transcriptional downregulation of the MYCN oncogene, which is frequently activated in aggressive tumors. While it is known that Sp1/Sp3 and E2F are necessary to drive basal MYCN expression, the mechanism for its downregulation by RA remains enigmatic. Changes in E2F binding have been reported, however these occurred after the actual transcriptional response. Here, post-translational modifications of Sp proteins were examined as an alternate mechanism of RA-mediated promoter regulation. PROCEDURE Western blot was used to evaluate steady state levels of nuclear/cytoplasmic Sp1/Sp3. Promoter binding and DNA conformation were determined by gel shift, circular permutation, and chromatin immunoprecipitation assays. Immunoprecipitation/western and (32)P-phosphoamino analyses were used to detect glycosylation, acetylation, sumoylation, and phosphorylation. RESULTS RA did not affect the cellular level of Sp1/Sp3 proteins, their nuclear/cytoplasmic distribution, ability to bind the MYCN promoter, degree of Sp-induced DNA bending, or post-translational modifications. CONCLUSIONS MYCN RA response is not mediated solely though the region controlling basal activity. RA may be exerting its effects via multiple non-adjacent regulatory regions, potentially including basal motifs, either within the MYCN promoter or distally, on the same or even different chromosomes. Such cooperative trans-type DNA-protein interactions could explain the inaccessibility of this mechanism to the locus-specific approaches employed up to this point.
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Affiliation(s)
- Kelli K Kanemaru
- Natural Products and Cancer Biology Program, Cancer Research Center of Hawaii, Honolulu, Hawaii, USA
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Alvarez-Rodríguez R, Barzi M, Berenguer J, Pons S. Bone morphogenetic protein 2 opposes Shh-mediated proliferation in cerebellar granule cells through a TIEG-1-based regulation of Nmyc. J Biol Chem 2007; 282:37170-80. [PMID: 17951258 DOI: 10.1074/jbc.m705414200] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Nmyc is a potent regulator of cell cycle in cerebellar granular neuron precursors (CGNPs) and has been proposed to be the main effector of Shh (Sonic hedgehog) proliferative activity. Nmyc ectopic expression is sufficient to promote cell autonomous proliferation and can lead to tumorigenesis. Bone morphogenetic protein 2 (BMP2) antagonizes Shh proliferative effect by promoting cell cycle exit and differentiation in CGNPs. Here we report that BMP2 opposes Shh mitogenic activity by blocking Nmyc expression. We have identified TIEG-1 (KLF10) as the intermediary factor that blocks Nmyc expression through the occupancy of the Sp1 sites present in its promoter. We also demonstrate that TIEG-1 ectopic expression in CGNPs induces cell cycle arrest that can lead to apoptosis but fails to promote differentiation. Moreover, TIEG-1 synergizes with BMP2 activity to terminally differentiate CGNPs and independent differentiator signals such as dibutyryl cAMP and prevents apoptosis in TIEG-1 arrested cells. All together, these data strongly suggest that the BMP2 pathway triggers cell cycle exit and differentiation as two separated but coordinated processes, where TIEG-1 acts as a mediator of the cell cycle arrest.
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Affiliation(s)
- Rubén Alvarez-Rodríguez
- Department of Cell Death and Proliferation, Institute for Biomedical Research of Barcelona, IIBB-CSIC-IDIBAPS, 08036 Barcelona, Spain
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Falkenberg VR, Fregien N. Control of core 2 beta1,6 N-acetylglucosaminyltransferase-I transcription by Sp1 in lymphocytes and epithelial cells. Glycoconj J 2007; 24:511-9. [PMID: 17530395 DOI: 10.1007/s10719-007-9043-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2007] [Revised: 04/13/2007] [Accepted: 04/23/2007] [Indexed: 10/23/2022]
Abstract
Core 2 beta1,6 N-acetylglucosaminyltransferase-I (C2GnT-I) catalyzes the synthesis of one of the major core structures in GalNAc alpha-Ser/Thr O-linked oligosaccharides, the core 2 branch. The production of the core 2 branch is required for the synthesis of glycoforms that are important for the cellular functions of lymphocytes, mucin-producing epithelial cells and other cell types. Therefore, proper molecular control of C2GnT-I expression is very important for different types of cells. C2GnT-I is transcribed from 4 promoters, with promoter 2 being the major promoter. C2GnT-I promoter 2 lacks a TATA box and is very GC rich. In this study, the analysis of this promoter finds that the transcription factor Sp1 is essential for transcription of C2GnT-I in both mesodermally derived T-cells (Jurkat) and in endodermal mucin producing epithelial cells (NCI H292). In Jurkat cells, all nine of the Sp1 binding sites within the minimal promoter region contribute to transcription, and there is a linear relationship between the number of Sp1 sites and the transcriptional activity of the promoter. In NCI H292 cells, only three of these Sp1 binding sites are required for transcription from promoter 2. Chromatin immunoprecipitation confirms that Sp1 binds to promoter 2 in NCI H292 cells in vivo.
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Affiliation(s)
- V Rebecca Falkenberg
- Division of Viral and Rickettsial Diseases, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Atlanta, GA 30333, USA
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Vine AL, Leung YM, Bertram JS. Transcriptional regulation of connexin 43 expression by retinoids and carotenoids: similarities and differences. Mol Carcinog 2005; 43:75-85. [PMID: 15754312 DOI: 10.1002/mc.20080] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Gap junctions, connexons, are formed by assembly of trans-membrane connexin proteins and have multiple functions including the coordination of cell responses. Most human tumors are deficient in gap junctional communication (GJC) and restoration of GJC by forced expression of connexins reduces indices of neoplasia. Expression of connexin 43 (Cx43), the most widely-expressed connexin family member, is upregulated by cancer-preventive retinoids and carotenoids in normal and preneoplastic cells; an action considered of mechanistic significance. However, the molecular mechanism for upregulated expression is poorly understood. The retinoic acid receptor antagonist Ro 41-5253 was capable of suppressing retinoid-induction Cx43 luciferase reporter construct in F9 cells, but did not suppress reporter activity induced by the non-pro-vitamin A carotenoids astaxanthin or lycopene, indicating that retinoids have separate mechanisms of gene activation than non-pro-vitamin A carotenoids. Neither class of compound required protein synthesis for induction of Cx43 mRNA, nor was the 5.0 h half-life of Cx43 mRNA altered, indicating direct transcriptional activation. The responsive region was found within -158 bp and +209 bp of the transcription start site; this contains a Sp1/Sp3 GC-box to which Sp1 and Sp3 were bound, as revealed by electrophoretic mobility shift assays (EMSA), but no retinoic acid response element (RARE). Site directed mutagenesis of this GC-box resulted in increased basal levels of transcription and loss of responsiveness to a synthetic retinoid. In this construct astaxanthin and lycopene produced marginally, but not significantly higher, reporter activity than the control.
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Affiliation(s)
- Alex L Vine
- Cancer Research Center of Hawaii, University of Hawaii at Manoa, Honolulu, Hawaii 96813, USA
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