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Dedoni S, Olianas MC, Onali P. Lysophosphatidic Acid Stimulates Mitogenic Activity and Signaling in Human Neuroblastoma Cells through a Crosstalk with Anaplastic Lymphoma Kinase. Biomolecules 2024; 14:631. [PMID: 38927035 PMCID: PMC11201523 DOI: 10.3390/biom14060631] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Revised: 05/21/2024] [Accepted: 05/24/2024] [Indexed: 06/28/2024] Open
Abstract
Lysophosphatidic acid (LPA) is a well-documented pro-oncogenic factor in different cancers, but relatively little is known on its biological activity in neuroblastoma. The LPA effects and the participation of the tyrosine kinase receptor anaplastic lymphoma kinase (ALK) in LPA mitogenic signaling were studied in human neuroblastoma cell lines. We used light microscopy and [3H]-thymidine incorporation to determine cell proliferation, Western blot to study intracellular signaling, and pharmacological and molecular tools to examine the role of ALK. We found that LPA stimulated the growth of human neuroblastoma cells, as indicated by the enhanced cell number, clonogenic activity, and DNA synthesis. These effects were curtailed by the selective ALK inhibitors NPV-TAE684 and alectinib. In a panel of human neuroblastoma cell lines harboring different ALK genomic status, the ALK inhibitors suppressed LPA-induced phosphorylation of extracellular signal-regulated kinases 1/2 (ERK1/2), which are major regulators of cell proliferation. ALK depletion by siRNA treatment attenuated LPA-induced ERK1/2 activation. LPA enhanced ALK phosphorylation and potentiated ALK activation by the ALK ligand FAM150B. LPA enhanced the inhibitory phosphorylation of the tumor suppressor FoxO3a, and this response was impaired by the ALK inhibitors. These results indicate that LPA stimulates mitogenesis of human neuroblastoma cells through a crosstalk with ALK.
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Affiliation(s)
| | | | - Pierluigi Onali
- Laboratory of Cellular and Molecular Pharmacology, Section of Neurosciences, Department of Biomedical Sciences, University of Cagliari, Monserrato, 09042 Cagliari, Italy; (S.D.); (M.C.O.)
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2
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Sheeter DA, Garza S, Park HG, Benhamou LRE, Badi NR, Espinosa EC, Kothapalli KSD, Brenna JT, Powers JT. Unsaturated Fatty Acid Synthesis Is Associated with Worse Survival and Is Differentially Regulated by MYCN and Tumor Suppressor microRNAs in Neuroblastoma. Cancers (Basel) 2024; 16:1590. [PMID: 38672672 PMCID: PMC11048984 DOI: 10.3390/cancers16081590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2024] [Revised: 04/13/2024] [Accepted: 04/17/2024] [Indexed: 04/28/2024] Open
Abstract
MYCN amplification (MNA) and disruption of tumor suppressor microRNA (TSmiR) function are key drivers of poor outcomes in neuroblastoma (NB). While MYCN and TSmiRs regulate glucose metabolism, their role in de novo fatty acid synthesis (FAS) and unsaturated FAS (UFAS) remains poorly understood. Here, we show that FAS and UFAS (U/FAS) genes FASN, ELOVL6, SCD, FADS2, and FADS1 are upregulated in high-risk (HR) NB and that their expression is associated with lower overall survival. RNA-Seq analysis of human NB cell lines revealed parallel U/FAS gene expression patterns. Consistent with this, we found that NB-related TSmiRs were predicted to target these genes extensively. We further observed that both MYC and MYCN upregulated U/FAS pathway genes while suppressing TSmiR host gene expression, suggesting a possible U/FAS regulatory network between MYCN and TSmiRs in NB. NB cells are high in de novo synthesized omega 9 (ω9) unsaturated fatty acids and low in both ω6 and ω3, suggesting a means for NB to limit cell-autonomous immune stimulation and reactive oxygen species (ROS)-driven apoptosis from ω6 and ω3 unsaturated fatty acid derivatives, respectively. We propose a model in which MYCN and TSmiRs regulate U/FAS and play an important role in NB pathology, with implications for other MYC family-driven cancers.
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Affiliation(s)
- Dennis A. Sheeter
- Department of Pediatrics, Dell Pediatric Research Institute, Dell Medical School at The University of Texas at Austin, Austin, TX 78723, USA; (D.A.S.); (H.G.P.); (L.-R.E.B.); (N.R.B.); (E.C.E.)
| | - Secilia Garza
- Department of Chemistry, Dell Pediatric Research Institute, The University of Texas at Austin, Austin, TX 78723, USA;
| | - Hui Gyu Park
- Department of Pediatrics, Dell Pediatric Research Institute, Dell Medical School at The University of Texas at Austin, Austin, TX 78723, USA; (D.A.S.); (H.G.P.); (L.-R.E.B.); (N.R.B.); (E.C.E.)
| | - Lorraine-Rana E. Benhamou
- Department of Pediatrics, Dell Pediatric Research Institute, Dell Medical School at The University of Texas at Austin, Austin, TX 78723, USA; (D.A.S.); (H.G.P.); (L.-R.E.B.); (N.R.B.); (E.C.E.)
| | - Niharika R. Badi
- Department of Pediatrics, Dell Pediatric Research Institute, Dell Medical School at The University of Texas at Austin, Austin, TX 78723, USA; (D.A.S.); (H.G.P.); (L.-R.E.B.); (N.R.B.); (E.C.E.)
| | - Erika C. Espinosa
- Department of Pediatrics, Dell Pediatric Research Institute, Dell Medical School at The University of Texas at Austin, Austin, TX 78723, USA; (D.A.S.); (H.G.P.); (L.-R.E.B.); (N.R.B.); (E.C.E.)
| | - Kumar S. D. Kothapalli
- Department of Nutritional Sciences, College of Natural Sciences, The University of Texas at Austin, Austin, TX 78712, USA;
| | - J. Thomas Brenna
- Department of Pediatrics, Dell Pediatric Research Institute, Dell Medical School at The University of Texas at Austin, Austin, TX 78723, USA; (D.A.S.); (H.G.P.); (L.-R.E.B.); (N.R.B.); (E.C.E.)
- Department of Chemistry, Dell Pediatric Research Institute, The University of Texas at Austin, Austin, TX 78723, USA;
- Department of Nutritional Sciences, College of Natural Sciences, The University of Texas at Austin, Austin, TX 78712, USA;
| | - John T. Powers
- Department of Pediatrics, Dell Pediatric Research Institute, Dell Medical School at The University of Texas at Austin, Austin, TX 78723, USA; (D.A.S.); (H.G.P.); (L.-R.E.B.); (N.R.B.); (E.C.E.)
- Division of Pharmacology and Toxicology, College of Pharmacy, The University of Texas at Austin, Austin, TX 78712, USA
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3
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D'Oto A, Fang J, Jin H, Xu B, Singh S, Mullasseril A, Jones V, Abu-Zaid A, von Buttlar X, Cooke B, Hu D, Shohet J, Murphy AJ, Davidoff AM, Yang J. KDM6B promotes activation of the oncogenic CDK4/6-pRB-E2F pathway by maintaining enhancer activity in MYCN-amplified neuroblastoma. Nat Commun 2021; 12:7204. [PMID: 34893606 PMCID: PMC8664842 DOI: 10.1038/s41467-021-27502-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Accepted: 11/18/2021] [Indexed: 12/12/2022] Open
Abstract
The H3K27me2/me3 histone demethylase KDM6B is essential to neuroblastoma cell survival. However, the mechanism of KDM6B action remains poorly defined. We demonstrate that inhibition of KDM6B activity 1) reduces the chromatin accessibility of E2F target genes and MYCN, 2) selectively leads to an increase of H3K27me3 but a decrease of the enhancer mark H3K4me1 at the CTCF and BORIS binding sites, which may, consequently, disrupt the long-range chromatin interaction of MYCN and E2F target genes, and 3) phenocopies the transcriptome induced by the specific CDK4/6 inhibitor palbociclib. Overexpression of CDK4/6 or Rb1 knockout confers neuroblastoma cell resistance to both palbociclib and the KDM6 inhibitor GSK-J4. These data indicate that KDM6B promotes an oncogenic CDK4/6-pRB-E2F pathway in neuroblastoma cells via H3K27me3-dependent enhancer-promoter interactions, providing a rationale to target KDM6B for high-risk neuroblastoma. The histone demethylase KDM6B is reported to be essential for neuroblastoma cell survival. Here the authors show that KDM6B regulates CDK4/6-pRB-E2F pathway through H3K27me3-dependent enhancer-promoter interactions in neuroblastoma.
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Affiliation(s)
- Alexandra D'Oto
- Department of Surgery, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN, 38105, USA
| | - Jie Fang
- Department of Surgery, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN, 38105, USA
| | - Hongjian Jin
- Center for Applied Bioinformatics, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN, 38105, USA
| | - Beisi Xu
- Center for Applied Bioinformatics, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN, 38105, USA
| | - Shivendra Singh
- Department of Surgery, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN, 38105, USA
| | - Anoushka Mullasseril
- Department of Surgery, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN, 38105, USA
| | - Victoria Jones
- Department of Surgery, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN, 38105, USA
| | - Ahmed Abu-Zaid
- Department of Surgery, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN, 38105, USA
| | - Xinyu von Buttlar
- Department of Surgery, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN, 38105, USA
| | - Bailey Cooke
- Department of Surgery, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN, 38105, USA
| | - Dongli Hu
- Department of Surgery, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN, 38105, USA
| | - Jason Shohet
- Department of Pediatrics, University of Massachusetts Medical School, 55 Lake Avenue North, Worcester, MA, 01655, USA
| | - Andrew J Murphy
- Department of Surgery, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN, 38105, USA
| | - Andrew M Davidoff
- Department of Surgery, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN, 38105, USA.
| | - Jun Yang
- Department of Surgery, St. Jude Children's Research Hospital, 262 Danny Thomas Place, Memphis, TN, 38105, USA.
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Singh S, Quarni W, Goralski M, Wan S, Jin H, Van de Velde LA, Fang J, Wu Q, Abu-Zaid A, Wang T, Singh R, Craft D, Fan Y, Confer T, Johnson M, Akers WJ, Wang R, Murray PJ, Thomas PG, Nijhawan D, Davidoff AM, Yang J. Targeting the spliceosome through RBM39 degradation results in exceptional responses in high-risk neuroblastoma models. SCIENCE ADVANCES 2021; 7:eabj5405. [PMID: 34788094 PMCID: PMC8598007 DOI: 10.1126/sciadv.abj5405] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Accepted: 09/27/2021] [Indexed: 06/13/2023]
Abstract
Aberrant alternative pre-mRNA splicing plays a critical role in MYC-driven cancers and therefore may represent a therapeutic vulnerability. Here, we show that neuroblastoma, a MYC-driven cancer characterized by splicing dysregulation and spliceosomal dependency, requires the splicing factor RBM39 for survival. Indisulam, a “molecular glue” that selectively recruits RBM39 to the CRL4-DCAF15 E3 ubiquitin ligase for proteasomal degradation, is highly efficacious against neuroblastoma, leading to significant responses in multiple high-risk disease models, without overt toxicity. Genetic depletion or indisulam-mediated degradation of RBM39 induces significant genome-wide splicing anomalies and cell death. Mechanistically, the dependency on RBM39 and high-level expression of DCAF15 determine the exquisite sensitivity of neuroblastoma to indisulam. Our data indicate that targeting the dysregulated spliceosome by precisely inhibiting RBM39, a vulnerability in neuroblastoma, is a valid therapeutic strategy.
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Affiliation(s)
- Shivendra Singh
- Department of Surgery, St. Jude Children’s Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Waise Quarni
- Department of Surgery, St. Jude Children’s Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Maria Goralski
- Department of Internal Medicine, Program in Molecular Medicine, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd. K3.124, Dallas, TX 75390, USA
| | - Shibiao Wan
- Center for Applied Bioinformatics, St. Jude Children’s Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Hongjian Jin
- Center for Applied Bioinformatics, St. Jude Children’s Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Lee-Ann Van de Velde
- Department of Immunology, St. Jude Children’s Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Jie Fang
- Department of Surgery, St. Jude Children’s Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Qiong Wu
- Department of Surgery, St. Jude Children’s Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Ahmed Abu-Zaid
- Department of Surgery, St. Jude Children’s Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Tingting Wang
- Center for Childhood Cancer and Blood Disease, Abigail Wexner Research Institute, Nationwide Children’s Hospital, 700 Children’s Drive, Columbus, OH 43205, USA
| | - Ravi Singh
- Division of Radiation Biophysics, Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
| | - David Craft
- Division of Radiation Biophysics, Department of Radiation Oncology, Massachusetts General Hospital and Harvard Medical School, Boston, MA 02114, USA
| | - Yiping Fan
- Center for Applied Bioinformatics, St. Jude Children’s Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Thomas Confer
- Center for In Vivo Imaging and Therapeutics, St. Jude Children’s Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Melissa Johnson
- Center for In Vivo Imaging and Therapeutics, St. Jude Children’s Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Walter J. Akers
- Center for In Vivo Imaging and Therapeutics, St. Jude Children’s Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Ruoning Wang
- Center for Childhood Cancer and Blood Disease, Abigail Wexner Research Institute, Nationwide Children’s Hospital, 700 Children’s Drive, Columbus, OH 43205, USA
| | - Peter J. Murray
- Max Planck Institute of Biochemistry, Am Klopferspitz 18, 82152 Martinsried, Germany
| | - Paul G. Thomas
- Department of Immunology, St. Jude Children’s Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Deepak Nijhawan
- Department of Internal Medicine, Program in Molecular Medicine, University of Texas Southwestern Medical Center, 5323 Harry Hines Blvd. K3.124, Dallas, TX 75390, USA
| | - Andrew M. Davidoff
- Department of Surgery, St. Jude Children’s Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
| | - Jun Yang
- Department of Surgery, St. Jude Children’s Research Hospital, 262 Danny Thomas Place, Memphis, TN 38105, USA
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High Grade of Amplification of Six Regions on Chromosome 2p in a Neuroblastoma Patient with Very Poor Outcome: The Putative New Oncogene TSSC1. Cancers (Basel) 2021; 13:cancers13225792. [PMID: 34830942 PMCID: PMC8616235 DOI: 10.3390/cancers13225792] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Revised: 11/14/2021] [Accepted: 11/16/2021] [Indexed: 12/02/2022] Open
Abstract
Simple Summary Here, a case of neuroblastoma (NB) carrying a high-grade amplification of six loci besides MYCN is described. Since the patient had a very poor outcome, we postulated that these DNA co-amplifications might have a synergistic effect in increasing NB cell proliferation. In order to verify this hypothesis, we analyzed in silico the impact of high expression of the genes located within the amplifications on the NB patients’ outcome using a large dataset integrating three different platforms. These analyses disclosed that high expression of the TSSC1 gene was the most significantly associated with reduced overall survival of NB patients, suggesting that it may have a potential prognostic role in NB in both MYCN amplified and MYCN not amplified tumors. Further studies on TSSC1 interactions and functioning could lead to possible focused therapies for high-risk NB patients. Abstract We observed a case of high-risk neuroblastoma (NB) carried by a 28-month-old girl, displaying metastatic disease and a rapid decline of clinical conditions. By array-CGH analysis of the tumor tissue and of the metastatic bone marrow aspirate cells, we found a high-grade amplification of six regions besides MYCN on bands 2p25.3–p24.3. The genes involved in these amplifications were MYT1L, TSSC1, CMPK2, RSAD2, RNF144A, GREB1, NTSR2, LPIN1, NBAS, and the two intergenic non-protein coding RNAs LOC730811 and LOC339788. We investigated if these DNA co-amplifications may have an effect on enhancing tumor aggressiveness. We evaluated the association between the high expression of the amplified genes and NB patient’s outcome using the integration of gene expression data of 786 NB samples profiled with different public platforms from patients with at least five-year follow-up. NB patients with high expression of the TSSC1 gene were associated with a reduced survival rate. Immunofluorescence staining on primary tumor tissues confirmed that the TSSC1 protein expression was high in the relapsed or dead stage 4 cases, but it was generally low in NB patients in complete remission. TSSC1 appears as a putative new oncogene in NB.
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Ishfaq M, Pham T, Beaman C, Tamayo P, Yu AL, Joshi S. BTK Inhibition Reverses MDSC-Mediated Immunosuppression and Enhances Response to Anti-PDL1 Therapy in Neuroblastoma. Cancers (Basel) 2021; 13:817. [PMID: 33669187 PMCID: PMC7919651 DOI: 10.3390/cancers13040817] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 02/06/2021] [Accepted: 02/10/2021] [Indexed: 01/10/2023] Open
Abstract
MDSCs are immune cells of myeloid lineage that plays a key role in promoting tumor growth. The expansion of MDSCs in tumor-bearing hosts reduces the efficacy of checkpoint inhibitors and CAR-T therapies, and hence strategies that deplete or block the recruitment of MDSCs have shown benefit in improving responses to immunotherapy in various cancers, including NB. Ibrutinib, an irreversible molecular inhibitor of BTK, has been widely studied in B cell malignancies, and recently, this drug is repurposed for the treatment of solid tumors. Herein we report that BTK is highly expressed in both granulocytic and monocytic murine MDSCs isolated from mice bearing NB tumors, and its increased expression correlates with a poor relapse-free survival probability of NB patients. Moreover, in vitro treatment of murine MDSCs with ibrutinib altered NO production, decreased mRNA expression of Ido, Arg, Tgfβ, and displayed defects in T-cell suppression. Consistent with these findings, in vivo inhibition of BTK with ibrutinib resulted in reduced MDSC-mediated immune suppression, increased CD8+ T cell infiltration, decreased tumor growth, and improved response to anti-PDL1 checkpoint inhibitor therapy in a murine model of NB. These results demonstrate that ibrutinib modulates immunosuppressive functions of MDSC and can be used either alone or in combination with immunotherapy for augmenting antitumor immune responses in NB.
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Affiliation(s)
- Mehreen Ishfaq
- Division of Pediatric Hematology-Oncology, Moores Cancer Center, University of California, San Diego, CA 92093-0815, USA; (M.I.); (C.B.)
| | - Timothy Pham
- Office of Cancer Genomics, University of California, San Diego, CA 92093-0815, USA; (T.P.); (P.T.)
| | - Cooper Beaman
- Division of Pediatric Hematology-Oncology, Moores Cancer Center, University of California, San Diego, CA 92093-0815, USA; (M.I.); (C.B.)
| | - Pablo Tamayo
- Office of Cancer Genomics, University of California, San Diego, CA 92093-0815, USA; (T.P.); (P.T.)
| | - Alice L. Yu
- Department of Pediatrics, University of California, San Diego, CA 92093-0815, USA;
- Institute of Stem Cell and Translational Cancer Research, Chang Gung Memorial Hospital at Linkou, Chang Gung University, Taoyuan 131, Taiwan
| | - Shweta Joshi
- Division of Pediatric Hematology-Oncology, Moores Cancer Center, University of California, San Diego, CA 92093-0815, USA; (M.I.); (C.B.)
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Wei M, Ye M, Dong K, Dong R. Circulating tumor DNA in neuroblastoma. Pediatr Blood Cancer 2020; 67:e28311. [PMID: 32729220 DOI: 10.1002/pbc.28311] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 03/10/2020] [Accepted: 03/19/2020] [Indexed: 12/20/2022]
Abstract
As a sympathetic nervous system-derived tumor, aggressive neuroblastoma (NB) is currently attracting interest from researchers seeking diagnostic and prognostic markers via less invasive procedures. The analysis of circulating tumor DNA (ctDNA) in peripheral blood can provide genetic information from multiple tumor lesions and is not dependent on a surgical procedure. The identification of genetic alterations, chromosomal variations, and hypermethylation contained within plasma DNA yields clinical value in the diagnosis, risk stratification, monitoring of treatment effects, and survival prediction for patients. With the widespread application of genome sequencing, droplet digital polymerase chain reaction, and other advanced technologies, the detection of ctDNA may guide therapeutic schedules, enhance the quality of life, and improve the prognosis for patients with NB.
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Affiliation(s)
- Meng Wei
- Department of Pediatric Surgery, Children's Hospital of Fudan University, Shanghai, China
| | - Mujie Ye
- Department of Pediatric Surgery, Children's Hospital of Fudan University, Shanghai, China
| | - Kuiran Dong
- Department of Pediatric Surgery, Children's Hospital of Fudan University, Shanghai, China
| | - Rui Dong
- Department of Pediatric Surgery, Children's Hospital of Fudan University, Shanghai, China
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Cangelosi D, Morini M, Zanardi N, Sementa AR, Muselli M, Conte M, Garaventa A, Pfeffer U, Bosco MC, Varesio L, Eva A. Hypoxia Predicts Poor Prognosis in Neuroblastoma Patients and Associates with Biological Mechanisms Involved in Telomerase Activation and Tumor Microenvironment Reprogramming. Cancers (Basel) 2020; 12:E2343. [PMID: 32825087 PMCID: PMC7563184 DOI: 10.3390/cancers12092343] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 08/09/2020] [Accepted: 08/17/2020] [Indexed: 12/23/2022] Open
Abstract
The biological and clinical heterogeneity of neuroblastoma (NB) demands novel biomarkers and therapeutic targets in order to drive the most appropriate treatment for each patient. Hypoxia is a condition of low-oxygen tension occurring in poorly vascularized tumor tissues. In this study, we aimed to assess the role of hypoxia in the pathogenesis of NB and at developing a new clinically relevant hypoxia-based predictor of outcome. We analyzed the gene expression profiles of 1882 untreated NB primary tumors collected at diagnosis and belonging to four existing data sets. Analyses took advantage of machine learning methods. We identified NB-hop, a seven-gene hypoxia biomarker, as a predictor of NB patient prognosis, which is able to discriminate between two populations of patients with unfavorable or favorable outcome on a molecular basis. NB-hop retained its prognostic value in a multivariate model adjusted for established risk factors and was able to additionally stratify clinically relevant groups of patients. Tumors with an unfavorable NB-hop expression showed a significant association with telomerase activation and a hypoxic, immunosuppressive, poorly differentiated, and apoptosis-resistant tumor microenvironment. NB-hop defines a new population of NB patients with hypoxic tumors and unfavorable prognosis and it represents a critical factor for the stratification and treatment of NB patients.
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Affiliation(s)
- Davide Cangelosi
- Laboratory of Molecular Biology, IRCCS Istituto Giannina Gaslini, 16147 Genova, Italy; (M.M.); (N.Z.); (L.V.); (A.E.)
| | - Martina Morini
- Laboratory of Molecular Biology, IRCCS Istituto Giannina Gaslini, 16147 Genova, Italy; (M.M.); (N.Z.); (L.V.); (A.E.)
| | - Nicolò Zanardi
- Laboratory of Molecular Biology, IRCCS Istituto Giannina Gaslini, 16147 Genova, Italy; (M.M.); (N.Z.); (L.V.); (A.E.)
| | - Angela Rita Sementa
- Laboratory of Pathology, IRCCS Istituto Giannina Gaslini, 16147 Genova, Italy;
| | - Marco Muselli
- Institute of Electronics, Computer and Telecommunication Engineering, Italian National Research Council, 16149 Genova, Italy;
| | - Massimo Conte
- Pediatric Oncology Unit, IRCCS Istituto Giannina Gaslini, 16147 Genova, Italy; (M.C.); (A.G.)
| | - Alberto Garaventa
- Pediatric Oncology Unit, IRCCS Istituto Giannina Gaslini, 16147 Genova, Italy; (M.C.); (A.G.)
| | - Ulrich Pfeffer
- Integrated Oncology Therapies Department, Molecular Pathology, IRCCS Ospedale Policlinico San Martino, 16132 Genova, Italy;
| | - Maria Carla Bosco
- Laboratory of Molecular Biology, IRCCS Istituto Giannina Gaslini, 16147 Genova, Italy; (M.M.); (N.Z.); (L.V.); (A.E.)
| | - Luigi Varesio
- Laboratory of Molecular Biology, IRCCS Istituto Giannina Gaslini, 16147 Genova, Italy; (M.M.); (N.Z.); (L.V.); (A.E.)
| | - Alessandra Eva
- Laboratory of Molecular Biology, IRCCS Istituto Giannina Gaslini, 16147 Genova, Italy; (M.M.); (N.Z.); (L.V.); (A.E.)
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9
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Amoroso L, Ognibene M, Morini M, Conte M, Di Cataldo A, Tondo A, D'Angelo P, Castellano A, Garaventa A, Lasorsa VA, Podestà M, Capasso M, Pezzolo A. Genomic coamplification of CDK4/MDM2/FRS2 is associated with very poor prognosis and atypical clinical features in neuroblastoma patients. Genes Chromosomes Cancer 2019; 59:277-285. [PMID: 31756773 DOI: 10.1002/gcc.22827] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 11/20/2019] [Accepted: 11/20/2019] [Indexed: 12/30/2022] Open
Abstract
Neuroblastoma (NB) is the most common extracranial malignant tumor of childhood and is characterized by a broad heterogeneity in clinical presentation and evolution. Recent advances in pangenomic analysis of NB have revealed different recurrent chromosomal aberrations. Indeed, it is now well established that the overall genomic profile is important for treatment stratification. In previous studies, 11 genes were shown to be recurrently amplified (ODC1, ALK, GREB1, NTSR2, LIN28B, MDM2, CDK4, MYEOV, CCND1, TERT, and MYC) besides MYCN, with poor survival of NB patients harboring these amplifications being suggested. Genomic profiles of 628 NB samples analyzed by array-comparative genome hybridization (a-CGH) were re-examined to identify gene amplifications other them MYCN amplification. Clinical data were retrospectively collected. We additionally evaluated the association of FRS2 gene expression with NB patient outcome using the public R2 Platform. We found eight NB samples with high grade amplification of one or two loci on chromosome arm 12q. The regional amplifications were located on bands 12q13.3-q14.1 and 12q15-q21.1 involving the genes CDK4, MDM2, and the potential oncogenic gene FRS2. The CDK4, MDM2, and FRS2 loci were coamplified in 8/8 samples. The 12q amplifications were associated with very poor prognosis and atypical clinical features of NB patients. Further functional and clinical investigations are needed to confirm or refute these associations.
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Affiliation(s)
| | - Marzia Ognibene
- Laboratorio Cellule Staminali e Terapie Cellulari, IRCCS Istituto Gaslini, Genova, Italy
| | - Martina Morini
- Laboratorio di Biologia Molecolare, IRCCS Istituto Gaslini, Genova, Italy
| | - Massimo Conte
- UOC Oncologia, IRCCS Istituto Gaslini, Genova, Italy
| | | | - Annalisa Tondo
- UOC Oncologia Pediatrica, Ospedale Meyer, Firenze, Italy
| | - Paolo D'Angelo
- UOC Onco-ematologia Pediatrica, Ospedale dei Bambini, Palermo, Italy
| | | | | | - Vito A Lasorsa
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche, Università degli Studi di Napoli Federico II, Naples, Italy.,CEINGE Biotecnologie Avanzate, Naples, Italy
| | - Marina Podestà
- Laboratorio Cellule Staminali e Terapie Cellulari, IRCCS Istituto Gaslini, Genova, Italy
| | - Mario Capasso
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche, Università degli Studi di Napoli Federico II, Naples, Italy.,CEINGE Biotecnologie Avanzate, Naples, Italy
| | - Annalisa Pezzolo
- Laboratorio Cellule Staminali e Terapie Cellulari, IRCCS Istituto Gaslini, Genova, Italy
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10
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Cao Y, Jin Y, Yu J, Wang J, Qiu Y, Duan X, Ye Y, Cheng Y, Dong L, Feng X, Wang D, Li Z, Tian X, Wang H, Yan J, Zhao Q. Clinical evaluation of integrated panel testing by next-generation sequencing for somatic mutations in neuroblastomas with MYCN unamplification. Oncotarget 2018; 8:49689-49701. [PMID: 28591696 PMCID: PMC5564799 DOI: 10.18632/oncotarget.17917] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Accepted: 05/01/2017] [Indexed: 11/25/2022] Open
Abstract
Neuroblastomas (NBs) exhibit heterogeneity and show clinically significant prognosis classified by genetic alterations. Among prognostic genes or genome factors, MYCN amplification (MNA) is the most established genomic marker of poor prognosis in patients with NB. However, the prognostic classification of more than 60% of patients without MNA has yet to be clarified. In this study, the application of target next-generation sequencing (NGS) was extended on the basis of a comprehensive panel of regions where copy number variations (CNVs) or point mutations occurred to improve the prognostic evaluation of these patients and obtain the sequence of 33 patients without MNA. A mean coverage depth of 887× was determined in the target regions in all of the samples, and the mapped read percentage was more than 99%. Somatic mutations in patients without MNA could be precisely defined on the basis of these findings, and 17 unique somatic aberrations, including 14 genes, were identified in 11 patients. Among these variations, most were CNVs with a number of 13. The 3-year event-free survival (EFS) of CNV(−) patients was 60.0% compared with the EFS (16.7%) of CNV(+) patients (P = 0.015, HR = 0.1344, 95%, CI = 0.027 to 0.678). CNVs were also associated with unfavorable histological characteristics (P = 0.003) and likely to occur in stage 4 (P = 0.041). These results might further indicate the role of CNVs in NB chemotherapy resistance (P = 0.059) and show CNVs as a therapeutic target. In multivariate analysis, the presence of CNVs was a clinically negative prognostic marker that impaired the outcome of patients without MNA and associated with poor prognosis in this tumor subset. Comprehensive genetic/genomic profiling instead of focusing on single genetic marker should be performed through in-depth NGS that could reveal prognostic information, improve NB target therapy, and provide a basis for investigations on NB pathogenesis.
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Affiliation(s)
- Yanna Cao
- Department of Pediatric Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, P.R. China
| | - Yan Jin
- Department of Pediatric Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, P.R. China
| | - Jinpu Yu
- Department of Cancer Molecular Diagnostic Center, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, P.R. China
| | - Jingfu Wang
- Department of Pediatric Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, P.R. China
| | - Yanli Qiu
- Department of Pediatric Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, P.R. China
| | - Xiaofeng Duan
- Department of Pediatric Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, P.R. China
| | - Yingnan Ye
- Department of Cancer Molecular Diagnostic Center, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, P.R. China
| | - Yanan Cheng
- Department of Cancer Molecular Diagnostic Center, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, P.R. China
| | - Li Dong
- Department of Cancer Molecular Diagnostic Center, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, P.R. China
| | - Xiaolong Feng
- Key Laboratory of Breast Cancer Prevention and Therapy, Ministry of Education, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy, Tianjin, 300060, P.R. China
| | - Daowei Wang
- Department of Pediatric Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, P.R. China
| | - Zhongyuan Li
- Department of Pediatric Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, P.R. China
| | - Xiangdong Tian
- Department of Pediatric Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, P.R. China
| | - Huijuan Wang
- Department of Pediatric Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, P.R. China
| | - Jie Yan
- Department of Pediatric Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, P.R. China
| | - Qiang Zhao
- Department of Pediatric Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, 300060, P.R. China
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11
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Frentzel J, Sorrentino D, Giuriato S. Targeting Autophagy in ALK-Associated Cancers. Cancers (Basel) 2017; 9:E161. [PMID: 29186933 PMCID: PMC5742809 DOI: 10.3390/cancers9120161] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 11/17/2017] [Accepted: 11/23/2017] [Indexed: 12/15/2022] Open
Abstract
Autophagy is an evolutionarily conserved catabolic process, which is used by the cells for cytoplasmic quality control. This process is induced following different kinds of stresses e.g., metabolic, environmental, or therapeutic, and acts, in this framework, as a cell survival mechanism. However, under certain circumstances, autophagy has been associated with cell death. This duality has been extensively reported in solid and hematological cancers, and has been observed during both tumor development and cancer therapy. As autophagy plays a critical role at the crossroads between cell survival and cell death, its involvement and therapeutic modulation (either activation or inhibition) are currently intensively studied in cancer biology, to improve treatments and patient outcomes. Over the last few years, studies have demonstrated the occurrence of autophagy in different Anaplastic Lymphoma Kinase (ALK)-associated cancers, notably ALK-positive anaplastic large cell lymphoma (ALCL), non-small cell lung carcinoma (NSCLC), Neuroblastoma (NB), and Rhabdomyosarcoma (RMS). In this review, we will first briefly describe the autophagic process and how it can lead to opposite outcomes in anti-cancer therapies, and we will then focus on what is currently known regarding autophagy in ALK-associated cancers.
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Affiliation(s)
- Julie Frentzel
- Merck Serono S.A., Route de Fenil 25, Z.I. B, 1804 Corsier-sur-Vevey, Switzerland.
| | - Domenico Sorrentino
- Inserm, UMR1037, CNRS, ERL5294, Université Toulouse III-Paul Sabatier, CRCT, F-31000 Toulouse, France.
| | - Sylvie Giuriato
- Inserm, UMR1037, CNRS, ERL5294, Université Toulouse III-Paul Sabatier, CRCT, F-31000 Toulouse, France.
- European Research Initiative on ALK-related malignancies (ERIA).
- TRANSAUTOPHAGY: European Network for Multidisciplinary Research and Translation of Autophagy Knowledge, COST Action CA15138.
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12
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Cao Y, Jin Y, Yu J, Wang J, Yan J, Zhao Q. Research progress of neuroblastoma related gene variations. Oncotarget 2017; 8:18444-18455. [PMID: 28055978 PMCID: PMC5392342 DOI: 10.18632/oncotarget.14408] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Accepted: 12/27/2016] [Indexed: 01/08/2023] Open
Abstract
Neuroblastoma, the most common extracranial solid tumor among children, is an embryonal tumor originating from undifferentiated neural crest cell. Neuroblastomas are highly heterogeneous, represented by the wide range of clinical presentations and likelihood of cure, ranging from spontaneous regression to relentless progression despite rigorous multimodal treatments. Approximately, 50% of cases are high-risk with overall survival rates less than 40%. With the efforts to collect large numbers of clinically annotated specimens and the advancements in technologies, researchers have revealed numerous genetic alterations that may drive tumor growth. However, the most lack mutations in genes that are recurrently mutated, which inspires researchers to identify disrupted pathways instead of single mutated genes to unearth biological systems perturbed in neuroblastoma. Stratification of patients and target therapy based on their molecular signatures have been the center of focus. This review provides a comprehensive summary of the recent advances in identification of candidate genes variations, targeted approaches to high-risk neuroblastoma and evaluates the methods utilized for detection, which will provide new avenues to develop therapies and further genetic researches.
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Affiliation(s)
- Yanna Cao
- Department of Pediatric Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, P.R. China
| | - Yan Jin
- Department of Pediatric Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, P.R. China
| | - Jinpu Yu
- Department of Cancer Molecular Diagnostic Center, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, P.R. China
| | - Jingfu Wang
- Department of Pediatric Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, P.R. China
| | - Jie Yan
- Department of Pediatric Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, P.R. China
| | - Qiang Zhao
- Department of Pediatric Oncology, Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Key Laboratory of Cancer Prevention and Therapy of Tianjin, Tianjin's Clinical Research Center for Cancer, Tianjin, P.R. China
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13
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Dolman MEM, van der Ploeg I, Koster J, Bate-Eya LT, Versteeg R, Caron HN, Molenaar JJ. DNA-Dependent Protein Kinase As Molecular Target for Radiosensitization of Neuroblastoma Cells. PLoS One 2015; 10:e0145744. [PMID: 26716839 PMCID: PMC4696738 DOI: 10.1371/journal.pone.0145744] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Accepted: 12/08/2015] [Indexed: 11/18/2022] Open
Abstract
Tumor cells might resist therapy with ionizing radiation (IR) by non-homologous end-joining (NHEJ) of IR-induced double-strand breaks. One of the key players in NHEJ is DNA-dependent protein kinase (DNA-PK). The catalytic subunit of DNA-PK, i.e. DNA-PKcs, can be inhibited with the small-molecule inhibitor NU7026. In the current study, the in vitro potential of NU7026 to radiosensitize neuroblastoma cells was investigated. DNA-PKcs is encoded by the PRKDC (protein kinase, DNA-activated, catalytic polypeptide) gene. We showed that PRKDC levels were enhanced in neuroblastoma patients and correlated with a more advanced tumor stage and poor prognosis, making DNA-PKcs an interesting target for radiosensitization of neuroblastoma tumors. Optimal dose finding for combination treatment with NU7026 and IR was performed using NGP cells. One hour pre-treatment with 10 μM NU7026 synergistically sensitized NGP cells to 0.63 Gy IR. Radiosensitizing effects of NU7026 increased in time, with maximum effects observed from 96 h after IR-exposure on. Combined treatment of NGP cells with 10 μM NU7026 and 0.63 Gy IR resulted in apoptosis, while no apoptotic response was observed for either of the therapies alone. Inhibition of IR-induced DNA-PK activation by NU7026 confirmed the capability of NGP cells to, at least partially, resist IR by NHEJ. NU7026 also synergistically radiosensitized other neuroblastoma cell lines, while no synergistic effect was observed for low DNA-PKcs-expressing non-cancerous fibroblasts. Results obtained for NU7026 were confirmed by PRKDC knockdown in NGP cells. Taken together, the current study shows that DNA-PKcs is a promising target for neuroblastoma radiosensitization.
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Affiliation(s)
- M. Emmy M. Dolman
- Department of Oncogenomics, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
- * E-mail:
| | - Ida van der Ploeg
- Department of Oncogenomics, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
| | - Jan Koster
- Department of Oncogenomics, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
| | - Laurel Tabe Bate-Eya
- Department of Oncogenomics, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
| | - Rogier Versteeg
- Department of Oncogenomics, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
| | - Huib N. Caron
- Department of Pediatric Oncology, Emma Kinderziekenhuis, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
| | - Jan J. Molenaar
- Department of Oncogenomics, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
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14
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Comparative genetic study of intratumoral heterogenous MYCN amplified neuroblastoma versus aggressive genetic profile neuroblastic tumors. Oncogene 2015; 35:1423-32. [PMID: 26119945 DOI: 10.1038/onc.2015.200] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2015] [Revised: 04/08/2015] [Accepted: 05/10/2015] [Indexed: 12/18/2022]
Abstract
Intratumoral heterogeneous MYCN amplification (hetMNA) is an unusual event in neuroblastoma with unascertained biological and clinical implications. Diagnosis is based on the detection of MYCN amplification surrounded by non-amplified tumor cells by fluorescence in situ hybridization (FISH). To better define the genetic features of hetMNA tumors, we studied the Spanish cohort of neuroblastic tumors by FISH and single nucleotide polymorphism arrays. We compared hetMNA tumors with homogeneous MNA (homMNA) and nonMNA tumors with 11q deletion (nonMNA w11q-). Of 1091 primary tumors, 28 were hetMNA by FISH. Intratumoral heterogeneity of 1p, 2p, 11q and 17q was closely associated with hetMNA tumors when analyzing different pieces for each case. For chromosome 2, 16 cases showed 2p intact, 4 focal gain at 2p24.3 and 8 MNA. The lengths of the smallest regions of overlap (SROs) for 2p gains and 1p deletions were between the SRO lengths observed in homMNA and nonMNA w11q- tumors. Co-occurrence of 11q- and +17q was frequently found with the largest SROs for both aberrations. The evidence for and frequency of different genetic subpopulations representing a hallmark of the hetMNA subgroup of NB indicates, on one hand, the presence of a considerable genetic instability with different SRO of either gains and losses compared with those of the other NB groups and highlights and, on the other hand, the need for multiple sampling from distant and macroscopically and microscopically distinct tumor areas. Narrowing down the different SRO for both deletions and gains in NB groups would be crucial to pinpointing the candidate gene(s) and the critical gene dosage with prognostic and therapeutic significance. This complexity of segmental chromosomal aberration patterns reinforces the necessity for a larger cohort study using FISH and pangenomic techniques to develop a suitable therapeutic strategy for these patients.
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15
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Huang L, Xie Y, Zhou Y, Luo Y, Huang X, Xu Z, Cai D, Fang Q. Clinical and molecular cytogenetic studies of an unrecognised 22q11.2 deletion in three families. Exp Ther Med 2015; 9:823-828. [PMID: 25667635 PMCID: PMC4316895 DOI: 10.3892/etm.2015.2200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Accepted: 12/12/2014] [Indexed: 11/06/2022] Open
Abstract
The phenotypic variability associated with 22q11.2 deletion syndrome (22q11.2DS) is well known. In the present study, the cases of three unrelated adult patients with chromosome 22q11.2DS and nearly normal features are described, along with their reproductive histories. Chromosomal analysis with fluorescent in situ hybridisation and genomic DNA analysis by microarrays were performed, as well as a clinical examination. The three patients were found to possess an identical breakpoint deletion at 22q11.2 by high-density whole-genome single nucleotide polymorphism microarray analysis. The patients had histories of two foetuses/infants with congenital heart defects. The underlying aetiology for the discordance in the phenotype in these patients is discussed. These observations provide additional data useful for patient counselling and guidelines for 22q11.2 clinical screening.
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Affiliation(s)
- Linhuan Huang
- Fetal Medicine Centre, Department of Obstetrics and Gynaecology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong 510080, P.R. China
| | - Yingjun Xie
- Fetal Medicine Centre, Department of Obstetrics and Gynaecology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong 510080, P.R. China
| | - Yi Zhou
- Fetal Medicine Centre, Department of Obstetrics and Gynaecology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong 510080, P.R. China
| | - Yanmin Luo
- Fetal Medicine Centre, Department of Obstetrics and Gynaecology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong 510080, P.R. China
| | - Xuan Huang
- Fetal Medicine Centre, Department of Obstetrics and Gynaecology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong 510080, P.R. China
| | - Zhe Xu
- Division of Cardiac Surgery, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong 510080, P.R. China
| | - Danlei Cai
- Department of Ultrasonic Medicine, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong 510080, P.R. China
| | - Qun Fang
- Fetal Medicine Centre, Department of Obstetrics and Gynaecology, The First Affiliated Hospital of Sun Yat-Sen University, Guangzhou, Guangdong 510080, P.R. China
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16
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Angelini P, Baruchel S, Marrano P, Irwin MS, Thorner PS. The neuroblastoma and ganglion components of nodular ganglioneuroblastoma are genetically similar: evidence against separate clonal origins. Mod Pathol 2015; 28:166-76. [PMID: 25081755 DOI: 10.1038/modpathol.2014.90] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Revised: 04/18/2014] [Accepted: 04/19/2014] [Indexed: 12/12/2022]
Abstract
Nodular ganglioneuroblastoma is characterized by a macroscopic nodule of neuroblastoma within a ganglioneuromatous component. These two components have been considered to originate from separate clones, with the neuroblastoma clone accounting for the clinical behavior of nodular ganglioneuroblastoma. In order to investigate the clonal origin of the cellular components (neuroblasts, ganglion cells, and Schwann cells) of nodular ganglioneuroblastoma, paraffin-embedded tumor samples from eight cases were analyzed by single nucleotide polymorphism array and in situ hybridization. DNA was extracted separately from neuroblastomatous and ganglioneuromatous areas. By in situ hybridization, MYCN gain (4-10 gene copies/nucleus) was detected in 7/8 neuroblastoma samples. In ganglioneuromatous regions, gains were also detected in ganglion cells but not in Schwann cells. Single-nucleotide polymorphism array studies identified chromosome losses (11q and 14q) and gains (12, 13q, 17q and 18q) in the neuroblastoma component, whereas the ganglioneuromatous component showed fewer or no genetic alterations. There were no unique copy number changes distinguishing nodular ganglioneuroblastoma from other subtypes of neuroblastoma. By in situ hybridization, ganglion cells but not Schwann cells showed the same alterations detected in neuroblasts. Thus, neuroblasts and ganglion cells in nodular ganglioneuroblastoma are genetically related and may arise from the same clone. In contrast, the Schwann cells have a different origin and may be derived from a non-neoplastic neural crest precursor. Our results suggest that the clinical behavior of nodular ganglioneuroblastoma cannot be explained by the presence of separate clones with distinct genetic signatures.
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Affiliation(s)
- Paola Angelini
- Division of Haematology/Oncology, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
| | - Sylvain Baruchel
- 1] Division of Haematology/Oncology, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada [2] Department of Pediatrics, University of Toronto, University of Toronto, Toronto, ON, Canada
| | - Paula Marrano
- Division of Pathology, The Hospital for Sick Children, Toronto, ON, Canada
| | - Meredith S Irwin
- 1] Division of Haematology/Oncology, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada [2] Department of Pediatrics, University of Toronto, University of Toronto, Toronto, ON, Canada
| | - Paul S Thorner
- 1] Division of Pathology, The Hospital for Sick Children, Toronto, ON, Canada [2] Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada
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17
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Wolter JK, Wolter NE, Blanch A, Partridge T, Cheng L, Morgenstern DA, Podkowa M, Kaplan DR, Irwin MS. Anti-tumor activity of the beta-adrenergic receptor antagonist propranolol in neuroblastoma. Oncotarget 2014; 5:161-72. [PMID: 24389287 PMCID: PMC3960198 DOI: 10.18632/oncotarget.1083] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
Neuroblastoma (NB) is a pediatric tumor of the sympathetic nervous system, which is often associated with elevated catecholamines. More than half of patients with metastatic NB relapse and survival is extremely poor with current therapies. In a high-throughput screen of FDA-approved drugs we identified anti-NB activity for the nonselective β-adrenergic receptor antagonist propranolol hydrochloride. Propranolol inhibited growth of a panel of fifteen NB cell lines irrespective of MYCN status, and treatment induced apoptosis and decreased proliferation. Activity was dependent on inhibition of the β2, and not β1, adrenergic receptor, and treatment resulted in activation of p53 and p73 signaling in vitro. The majority of NB cell lines and primary tumors express β2 adrenergic receptor and higher mRNA levels correlate with improved patient survival, but expression levels did not correlate with in vitro sensitivity to propranolol. Furthermore, propranolol is synergistic with the topoisomerase I inhibitor SN-38 and propranolol inhibits growth of NB xenografts in vivo at doses similar to those used to treat infants with hemangiomas and hypertension. Taken together, our results suggest that propranolol has activity against NB and thus should be considered in combination treatments for patients with relapsed and refractory NB.
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Affiliation(s)
- Jennifer K Wolter
- Departments of Pediatrics and Medical Biophysics, University of Toronto
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18
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Schleiermacher G, Janoueix-Lerosey I, Delattre O. Recent insights into the biology of neuroblastoma. Int J Cancer 2014; 135:2249-61. [PMID: 25124476 DOI: 10.1002/ijc.29077] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Accepted: 05/08/2014] [Indexed: 01/24/2023]
Abstract
Neuroblastoma (NB) is an embryonal tumor of the sympathetic nervous system which accounts for 8-10% of pediatric cancers. It is characterized by a broad spectrum of clinical behaviors from spontaneous regression to fatal outcome despite aggressive therapies. Considerable progress has been made recently in the germline and somatic genetic characterization of patients and tumors. Indeed, predisposition genes that account for a significant proportion of familial and syndromic cases have been identified and genome-wide association studies have retrieved a number of susceptibility loci. In addition, genome-wide sequencing, copy-number and expression studies have been conducted on tumors and have detected important gene modifications, profiles and signatures that have strong implications for the therapeutic stratification of patients. The identification of major players in NB oncogenesis, including MYCN, ALK, PHOX2B and LIN28B, has enabled the development of new animal models. Our review focuses on these recent advances, on the insights they provide on the mechanisms involved in NB development and their applications for the clinical management of patients.
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Affiliation(s)
- Gudrun Schleiermacher
- Equipe SIRIC Recherche Translationnelle en Oncologie Pédiatrique, Département de Recherche Translationnelle et Inserm U830, Centre de Recherche, Paris Cedex, 05, France; Département de pédiatrie, Institut Curie, Paris Cedex, 05, France; Unité Génétique et Biologie des Cancers, Inserm U830, Centre de Recherche, Institut Curie, Paris Cedex, 05, France
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19
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L'Abbate A, Macchia G, D'Addabbo P, Lonoce A, Tolomeo D, Trombetta D, Kok K, Bartenhagen C, Whelan CW, Palumbo O, Severgnini M, Cifola I, Dugas M, Carella M, De Bellis G, Rocchi M, Carbone L, Storlazzi CT. Genomic organization and evolution of double minutes/homogeneously staining regions with MYC amplification in human cancer. Nucleic Acids Res 2014; 42:9131-45. [PMID: 25034695 PMCID: PMC4132716 DOI: 10.1093/nar/gku590] [Citation(s) in RCA: 76] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
The mechanism for generating double minutes chromosomes (dmin) and homogeneously staining regions (hsr) in cancer is still poorly understood. Through an integrated approach combining next-generation sequencing, single nucleotide polymorphism array, fluorescent in situ hybridization and polymerase chain reaction-based techniques, we inferred the fine structure of MYC-containing dmin/hsr amplicons harboring sequences from several different chromosomes in seven tumor cell lines, and characterized an unprecedented number of hsr insertion sites. Local chromosome shattering involving a single-step catastrophic event (chromothripsis) was recently proposed to explain clustered chromosomal rearrangements and genomic amplifications in cancer. Our bioinformatics analyses based on the listed criteria to define chromothripsis led us to exclude it as the driving force underlying amplicon genesis in our samples. Instead, the finding of coexisting heterogeneous amplicons, differing in their complexity and chromosome content, in cell lines derived from the same tumor indicated the occurrence of a multi-step evolutionary process in the genesis of dmin/hsr. Our integrated approach allowed us to gather a complete view of the complex chromosome rearrangements occurring within MYC amplicons, suggesting that more than one model may be invoked to explain the origin of dmin/hsr in cancer. Finally, we identified PVT1 as a target of fusion events, confirming its role as breakpoint hotspot in MYC amplification.
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Affiliation(s)
| | - Gemma Macchia
- Department of Biology, University of Bari, Bari, Italy
| | | | - Angelo Lonoce
- Department of Biology, University of Bari, Bari, Italy
| | - Doron Tolomeo
- Department of Biology, University of Bari, Bari, Italy
| | - Domenico Trombetta
- Laboratory of Oncology, IRCCS Casa Sollievo della Sofferenza Hospital, San Giovanni Rotondo, Italy
| | - Klaas Kok
- Department of Genetics, University of Groningen, Groningen, The Netherlands
| | | | | | - Orazio Palumbo
- Medical Genetics Unit, IRCCS Casa Sollievo della Sofferenza Hospital, San Giovanni Rotondo, Italy
| | - Marco Severgnini
- Institute for Biomedical Technologies, National Research Council, Milan, Italy
| | - Ingrid Cifola
- Institute for Biomedical Technologies, National Research Council, Milan, Italy
| | - Martin Dugas
- Institute of Medical Informatics, University of Münster, Münster, Germany
| | - Massimo Carella
- Medical Genetics Unit, IRCCS Casa Sollievo della Sofferenza Hospital, San Giovanni Rotondo, Italy
| | - Gianluca De Bellis
- Institute for Biomedical Technologies, National Research Council, Milan, Italy
| | | | - Lucia Carbone
- National Primate Research Center, Beaverton, Oregon, USA
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Guimier A, Ferrand S, Pierron G, Couturier J, Janoueix-Lerosey I, Combaret V, Mosseri V, Thebaud E, Gambart M, Plantaz D, Marabelle A, Coze C, Rialland X, Fasola S, Lapouble E, Fréneaux P, Peuchmaur M, Michon J, Delattre O, Schleiermacher G. Clinical characteristics and outcome of patients with neuroblastoma presenting genomic amplification of loci other than MYCN. PLoS One 2014; 9:e101990. [PMID: 25013904 PMCID: PMC4094484 DOI: 10.1371/journal.pone.0101990] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Accepted: 06/13/2014] [Indexed: 01/01/2023] Open
Abstract
Background Somatically acquired genomic alterations with MYCN amplification (MNA) are key features of neuroblastoma (NB), the most common extra-cranial malignant tumour of childhood. Little is known about the frequency, clinical characteristics and outcome of NBs harbouring genomic amplification(s) distinct from MYCN. Methods Genomic profiles of 1100 NBs from French centres studied by array-CGH were re-examined specifically to identify regional amplifications. Patients were included if amplifications distinct from the MYCN locus were seen. A subset of NBs treated at Institut Curie and harbouring MNA as determined by array-CGH without other amplification was also studied. Clinical and histology data were retrospectively collected. Results In total, 56 patients were included and categorised into 3 groups. Group 1 (n = 8) presented regional amplification(s) without MNA. Locus 12q13-14 was a recurrent amplified region (4/8 cases). This group was heterogeneous in terms of INSS stages, primary localisations and histology, with atypical clinical features. Group 2 (n = 26) had MNA as well as other regional amplifications. These patients shared clinical features of those of a group of NBs MYCN amplified (Group 3, n = 22). Overall survival for group 1 was better than that of groups 2 and 3 (5 year OS: 87.5%±11% vs 34.9%±7%, log-rank p<0.05). Conclusion NBs harbouring regional amplification(s) without MNA are rare and seem to show atypical features in clinical presentation and genomic profile. Further high resolution genetic explorations are justified in this heterogeneous group, especially when considering these alterations as predictive markers for targeted therapy.
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Affiliation(s)
- Anne Guimier
- Institut Curie, Département de Pédiatrie, Paris, France
| | | | - Gaëlle Pierron
- Institut Curie, Unité de Génétique Somatique, Paris, France
| | | | | | - Valérie Combaret
- Centre Léon Bérard, Laboratoire de recherche translationnelle, Lyon, France
| | | | - Estelle Thebaud
- CHU Nantes, Service d'Hémato-Oncologie Pédiatrique, Nantes, France
| | - Marion Gambart
- CHU Toulouse, Service d'Hémato-Oncologie Pédiatrique, Toulouse, France
| | - Dominique Plantaz
- CHU Grenoble, Service d'Hémato-Oncologie Pédiatrique, Grenoble, France
| | - Aurélien Marabelle
- Institut d'Hématologie et d'Oncologie Pédiatrique, Centre de Lutte contre le Cancer Léon Bérard, Lyon, France
| | - Carole Coze
- Aix-Marseille Univ et APHM, Hôpital d'Enfants de La Timone, Service d'Hématologie-Oncologie Pédiatrique, Marseille, France
| | - Xavier Rialland
- CHU Angers, Service d'Hémato-Oncologie Pédiatrique, Angers, France
| | - Sylvie Fasola
- Hôpital Trousseau, Service d'Hémato-Oncologie Pédiatrique, Paris, France
| | - Eve Lapouble
- Institut Curie, Unité de Génétique Somatique, Paris, France
| | - Paul Fréneaux
- Institut Curie, Laboratoire d'anatomie pathologique, Paris, France
| | - Michel Peuchmaur
- APHP, hôpital Universitaire Robert Debré, Service de Pathologie, Paris, France, et Université Diderot Paris 7, Sorbonne Paris Cité, Paris, France
| | - Jean Michon
- Institut Curie, Département de Pédiatrie, Paris, France
| | - Olivier Delattre
- INSERM U830, Laboratoire de Génétique et Biologie des Cancers, Institut Curie, Paris, France
| | - Gudrun Schleiermacher
- Institut Curie, Département de Pédiatrie, Paris, France
- INSERM U830, Laboratoire de Génétique et Biologie des Cancers, Institut Curie, Paris, France
- * E-mail:
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21
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Thériault BL, Dimaras H, Gallie BL, Corson TW. The genomic landscape of retinoblastoma: a review. Clin Exp Ophthalmol 2013; 42:33-52. [PMID: 24433356 DOI: 10.1111/ceo.12132] [Citation(s) in RCA: 119] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Accepted: 04/07/2013] [Indexed: 12/13/2022]
Abstract
Retinoblastoma is a paediatric ocular tumour that continues to reveal much about the genetic basis of cancer development. Study of genomic aberrations in retinoblastoma tumours has exposed important mechanisms of cancer development and identified oncogenes and tumour suppressors that offer potential points of therapeutic intervention. The recent development of next-generation genomic technologies has allowed further refinement of the genomic landscape of retinoblastoma at high resolution. In a relatively short period of time, a wealth of genetic and epigenetic data has emerged on a small number of tumour samples. These data highlight the inherent molecular complexity of this cancer despite the fact that most retinoblastomas are initiated by the inactivation of a single tumour suppressor gene. This review outlines the current understanding of the genomic, genetic and epigenetic changes in retinoblastoma, highlighting recent genome-wide analyses that have identified exciting candidate genes worthy of further validation as potential prognostic and therapeutic targets.
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Affiliation(s)
- Brigitte L Thériault
- Campbell Family Cancer Research Institute, Ontario Cancer Institute, Princess Margaret Cancer Centre, Toronto, Ontario, Canada
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22
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van Nes J, Chan A, van Groningen T, van Sluis P, Koster J, Versteeg R. A NOTCH3 transcriptional module induces cell motility in neuroblastoma. Clin Cancer Res 2013; 19:3485-94. [PMID: 23649002 DOI: 10.1158/1078-0432.ccr-12-3021] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE Neuroblastoma is a childhood tumor of the peripheral sympathetic nervous system with an often lethal outcome due to metastatic disease. Migration and epithelial-mesenchymal transitions have been implicated in metastasis but they are hardly investigated in neuroblastoma. EXPERIMENTAL DESIGN Cell migration of 16 neuroblastoma cell lines was quantified in Transwell migration assays. Gene expression profiling was used to derive a migration signature, which was applied to classify samples in a neuroblastoma tumor series. Differential expression of transcription factors was analyzed in the subsets. NOTCH3 was prioritized, and inducible transgene expression studies in cell lines were used to establish whether it functions as a master switch for motility. RESULTS We identified a 36-gene expression signature that predicts cell migration. This signature was used to analyse expression profiles of 88 neuroblastoma tumors and identified a group with distant metastases and a poor prognosis. This group also expressed a known mesenchymal gene signature established in glioblastoma. Neuroblastomas recognized by the motility and mesenchymal signatures strongly expressed genes of the NOTCH pathway. Inducible expression of a NOTCH intracellular (NOTCH3-IC) transgene conferred a highly motile phenotype to neuroblastoma cells. NOTCH3-IC strongly induced expression of motility- and mesenchymal marker genes. Many of these genes were significantly coexpressed with NOTCH3 in neuroblastoma, as well as colon, kidney, ovary, and breast tumor series. CONCLUSION The NOTCH3 transcription factor is a master regulator of motility in neuroblastoma. A subset of neuroblastoma with high expression of NOTCH3 and its downstream-regulated genes has mesenchymal characteristics, increased incidence of metastases, and a poor prognosis.
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Affiliation(s)
- Johan van Nes
- Department of Oncogenomics, Academic Medical Center, Amsterdam, the Netherlands.
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23
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Bourdeaut F, Grison C, Maurage CA, Laquerriere A, Vasiljevic A, Delisle MB, Michalak S, Figarella-Branger D, Doz F, Richer W, Pierron G, Miquel C, Delattre O, Couturier J. MYC and MYCN amplification can be reliably assessed by aCGH in medulloblastoma. Cancer Genet 2013; 206:124-9. [PMID: 23578955 DOI: 10.1016/j.cancergen.2013.02.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2012] [Revised: 02/21/2013] [Accepted: 02/25/2013] [Indexed: 12/19/2022]
Abstract
As prognostic factors, MYC and MYCN amplifications are routinely assessed in medulloblastomas. Fluorescence in situ hybridization (FISH) is currently considered as the technique of reference. Recently, array comparative genomic hybridization (aCGH) has been developed as an alternative technique to evaluate genomic abnormalities in other tumor types; however, this technique has not been widely adopted as a replacement for FISH in medulloblastoma. In this study, 34 tumors were screened by both FISH and aCGH. In all cases showing amplification by FISH, aCGH also unambiguously revealed the abnormality. The aCGH technique was also performed on tumors showing no amplification by FISH, and the absence of amplification was confirmed in all cases. Interestingly, one tumor showed a subclonal MYC amplification by FISH. This subclonal amplification was observed in approximately 20% of tumor cells and was clearly evident on aCGH. In conclusion, our analysis confirms that aCGH is as safe as FISH for the detection of MYC/MYCN gene amplification. Given its cost efficiency in comparison to two FISH tests and the global genomic information additionally provided by an aCGH experiment, this reproducible technique can be safely retained as an alternative to FISH for routine investigation of medulloblastoma.
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Affiliation(s)
- Franck Bourdeaut
- INSERM U830, Laboratory of Genetics and Biology of Cancers, Curie Institute, Paris, France.
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24
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Villamón E, Berbegall AP, Piqueras M, Tadeo I, Castel V, Djos A, Martinsson T, Navarro S, Noguera R. Genetic instability and intratumoral heterogeneity in neuroblastoma with MYCN amplification plus 11q deletion. PLoS One 2013; 8:e53740. [PMID: 23341988 PMCID: PMC3544899 DOI: 10.1371/journal.pone.0053740] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2012] [Accepted: 12/03/2012] [Indexed: 12/14/2022] Open
Abstract
Background/Aim Genetic analysis in neuroblastoma has identified the profound influence of MYCN amplification and 11q deletion in patients’ prognosis. These two features of high-risk neuroblastoma usually occur as mutually exclusive genetic markers, although in rare cases both are present in the same tumor. The purpose of this study was to characterize the genetic profile of these uncommon neuroblastomas harboring both these high-risk features. Methods We selected 18 neuroblastomas with MNA plus 11q loss detected by FISH. Chromosomal aberrations were analyzed using Multiplex Ligation-dependent Probe Amplification and Single Nucleotide Polymorphism array techniques. Results and Conclusion This group of tumors has approximately the same high frequency of aberrations as found earlier for 11q deleted tumors. In some cases, DNA instability generates genetic heterogeneity, and must be taken into account in routine genetic diagnosis.
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Affiliation(s)
- Eva Villamón
- Department of Pathology, Medical School, University of Valencia, Valencia, Spain
| | - Ana P. Berbegall
- Department of Pathology, Medical School, University of Valencia, Valencia, Spain
| | - Marta Piqueras
- Department of Pathology, Medical School, University of Valencia, Valencia, Spain
| | - Irene Tadeo
- Research Foundation of Hospital Clínico Universitario of Valencia, Valencia, Spain
| | - Victoria Castel
- Pediatric Oncology Unit, Hospital Universitario La Fe, Valencia, Spain
| | - Anna Djos
- Department of Clinical Genetics, The Sahlgrenska Academy, University of Gothenburg, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Tommy Martinsson
- Department of Clinical Genetics, The Sahlgrenska Academy, University of Gothenburg, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Samuel Navarro
- Department of Pathology, Medical School, University of Valencia, Valencia, Spain
| | - Rosa Noguera
- Department of Pathology, Medical School, University of Valencia, Valencia, Spain
- * E-mail:
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25
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Cazes A, Louis-Brennetot C, Mazot P, Dingli F, Lombard B, Boeva V, Daveau R, Cappo J, Combaret V, Schleiermacher G, Jouannet S, Ferrand S, Pierron G, Barillot E, Loew D, Vigny M, Delattre O, Janoueix-Lerosey I. Characterization of rearrangements involving the ALK gene reveals a novel truncated form associated with tumor aggressiveness in neuroblastoma. Cancer Res 2012; 73:195-204. [PMID: 23139213 DOI: 10.1158/0008-5472.can-12-1242] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Activating mutations of the ALK gene have been identified in sporadic and familial cases of neuroblastoma (NB), a cancer of the peripheral nervous system, and are thought to be the primary mechanism of oncogenic activation of this receptor in this pediatric neoplasm. To address the possibility that ALK activation may occur through genomic rearrangements as detected in other cancers, we first took advantage of high-resolution array-comparative genomic hybridization to search for ALK rearrangements in NB samples. Using complementary experiments by capture/paired-end sequencing and FISH experiments, various types of rearrangements were fully characterized, including partial gains or amplifications, in several NB cell lines and primary tumors. In the CLB-Bar cell line, we described a genomic rearrangement associated with an amplification of the ALK locus, leading to the expression of a 170 kDa protein lacking part of the extracellular domain encoded by exons 4 to 11, named ALK(Δ4-11). Analysis of genomic DNA from the tumor at diagnosis and relapse revealed that the ALK gene was amplified at diagnosis but that the rearranged ALK allele was observed at the relapse stage only, suggesting that it may be implicated in tumor aggressiveness. Consistently, oncogenic and tumorigenic properties of the ALK(Δ4-11) variant were shown after stable expression in NIH3T3 cells. Moreover, we documented an increased constitutive kinase activity of this variant, as well as an impaired maturation and retention into intracellular compartments. These results indicate that genomic rearrangements constitute an alternative mechanism to ALK point mutations resulting in receptor activation.
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Affiliation(s)
- Alex Cazes
- Inserm U830, Institut Curie, Centre de Recherche, Paris, France
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26
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Functional MYCN signature predicts outcome of neuroblastoma irrespective of MYCN amplification. Proc Natl Acad Sci U S A 2012; 109:19190-5. [PMID: 23091029 DOI: 10.1073/pnas.1208215109] [Citation(s) in RCA: 181] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Neuroblastoma is a pediatric tumor of the sympathetic nervous system. MYCN (V-myc myelocytomatosis viral-related oncogene, neuroblastoma derived [avian]) is amplified in 20% of neuroblastomas, and these tumors carry a poor prognosis. However, tumors without MYCN amplification also may have a poor outcome. Here, we identified downstream targets of MYCN by shRNA-mediated silencing MYCN in neuroblastoma cells. From these targets, 157 genes showed an expression profile correlating with MYCN mRNA levels in NB88, a series of 88 neuroblastoma tumors, and therefore represent in vivo relevant MYCN pathway genes. This 157-gene signature identified very poor prognosis tumors in NB88 and independent neuroblastoma cohorts and was more powerful than MYCN amplification or MYCN expression alone. Remarkably, this signature also identified poor outcome of a group of tumors without MYCN amplification. Most of these tumors have low MYCN mRNA levels but high nuclear MYCN protein levels, suggesting stabilization of MYCN at the protein level. One tumor has an MYC amplification and high MYC expression. Chip-on-chip analyses showed that most genes in this signature are directly regulated by MYCN. MYCN induces genes functioning in cell cycle and DNA repair while repressing neuronal differentiation genes. The functional MYCN-157 signature recognizes classical neuroblastoma with MYCN amplification, as well as a newly identified group marked by MYCN protein stabilization.
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27
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Lamers F, Schild L, Koster J, Speleman F, Øra I, Westerhout EM, van Sluis P, Versteeg R, Caron HN, Molenaar JJ. Identification of BIRC6 as a novel intervention target for neuroblastoma therapy. BMC Cancer 2012; 12:285. [PMID: 22788920 PMCID: PMC3495678 DOI: 10.1186/1471-2407-12-285] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Accepted: 06/26/2012] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Neuroblastoma are pediatric tumors of the sympathetic nervous system with a poor prognosis. Apoptosis is often deregulated in cancer cells, but only a few defects in apoptotic routes have been identified in neuroblastoma. METHODS Here we investigated genomic aberrations affecting genes of the intrinsic apoptotic pathway in neuroblastoma. We analyzed DNA profiling data (CGH and SNP arrays) and mRNA expression data of 31 genes of the intrinsic apoptotic pathway in a dataset of 88 neuroblastoma tumors using the R2 bioinformatic platform ( http://r2.amc.nl). BIRC6 was selected for further analysis as a tumor driving gene. Knockdown experiments were performed using BIRC6 lentiviral shRNA and phenotype responses were analyzed by Western blot and MTT-assays. In addition, DIABLO levels and interactions were investigated with immunofluorescence and co-immunoprecipitation. RESULTS We observed frequent gain of the BIRC6 gene on chromosome 2, which resulted in increased mRNA expression. BIRC6 is an inhibitor of apoptosis protein (IAP), that can bind and degrade the cytoplasmic fraction of the pro-apoptotic protein DIABLO. DIABLO mRNA expression was exceptionally high in neuroblastoma but the protein was only detected in the mitochondria. Upon silencing of BIRC6 by shRNA, DIABLO protein levels increased and cells went into apoptosis. Co-immunoprecipitation confirmed direct interaction between DIABLO and BIRC6 in neuroblastoma cell lines. CONCLUSION Our findings indicate that BIRC6 may have a potential oncogenic role in neuroblastoma by inactivating cytoplasmic DIABLO. BIRC6 inhibition may therefore provide a means for therapeutic intervention in neuroblastoma.
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Affiliation(s)
- Fieke Lamers
- Department of Oncogenomics, Academic Medical Center, University of Amsterdam, Meibergdreef 15, PO box 22700, Amsterdam, AZ 1105, The Netherlands
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28
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Lamers F, van der Ploeg I, Schild L, Ebus ME, Koster J, Hansen BR, Koch T, Versteeg R, Caron HN, Molenaar JJ. Knockdown of survivin (BIRC5) causes apoptosis in neuroblastoma via mitotic catastrophe. Endocr Relat Cancer 2011; 18:657-68. [PMID: 21859926 DOI: 10.1530/erc-11-0207] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
BIRC5 (survivin) is one of the genes located on chromosome arm 17q in the region that is often gained in neuroblastoma. BIRC5 is a protein in the intrinsic apoptotic pathway that interacts with XIAP and DIABLO leading to caspase-3 and caspase-9 inactivation. BIRC5 is also involved in stabilizing the microtubule-kinetochore dynamics. Based on the Affymetrix mRNA expression data, we here show that BIRC5 expression is strongly upregulated in neuroblastoma compared with normal tissues, adult malignancies, and non-malignant fetal adrenal neuroblasts. The over-expression of BIRC5 correlates with an unfavorable prognosis independent of the presence of 17q gain. Silencing of BIRC5 in neuroblastoma cell lines by various antisense molecules resulted in massive apoptosis as measured by PARP cleavage and FACS analysis. As both the intrinsic apoptotic pathway and the chromosomal passenger complex can be therapeutically targeted, we investigated in which of them BIRC5 exerted its essential anti-apoptotic role. Immunofluorescence analysis of neuroblastoma cells after BIRC5 silencing showed formation of multinucleated cells indicating mitotic catastrophe, which leads to apoptosis via P53 and CASP2. We show that BIRC5 silencing indeed resulted in activation of P53 and we could rescue apoptosis by CASP2 inhibition. We conclude that BIRC5 stabilizes the microtubules in the chromosomal passenger complex in neuroblastoma and that the apoptotic response results from mitotic catastrophe, which makes BIRC5 an interesting target for therapy.
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Affiliation(s)
- Fieke Lamers
- Department of Oncogenomics, Academic Medical Center, University of Amsterdam, Meibergdreef 15, PO Box 22700, 1105 AZ Amsterdam, The Netherlands
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Pandita A, Bayani J, Paderova J, Marrano P, Graham C, Barrett M, Prasad M, Zielenska M, Squire J. Integrated Cytogenetic and High-Resolution Array CGH Analysis of Genomic Alterations Associated with MYCN Amplification. Cytogenet Genome Res 2011; 134:27-39. [DOI: 10.1159/000324698] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/03/2010] [Indexed: 01/05/2023] Open
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30
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Storlazzi CT, Lonoce A, Guastadisegni MC, Trombetta D, D'Addabbo P, Daniele G, L'Abbate A, Macchia G, Surace C, Kok K, Ullmann R, Purgato S, Palumbo O, Carella M, Ambros PF, Rocchi M. Gene amplification as double minutes or homogeneously staining regions in solid tumors: origin and structure. Genome Res 2010; 20:1198-206. [PMID: 20631050 DOI: 10.1101/gr.106252.110] [Citation(s) in RCA: 153] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Double minutes (dmin) and homogeneously staining regions (hsr) are the cytogenetic hallmarks of genomic amplification in cancer. Different mechanisms have been proposed to explain their genesis. Recently, our group showed that the MYC-containing dmin in leukemia cases arise by excision and amplification (episome model). In the present paper we investigated 10 cell lines from solid tumors showing MYCN amplification as dmin or hsr. Particularly revealing results were provided by the two subclones of the neuroblastoma cell line STA-NB-10, one showing dmin-only and the second hsr-only amplification. Both subclones showed a deletion, at 2p24.3, whose extension matched the amplicon extension. Additionally, the amplicon structure of the dmin and hsr forms was identical. This strongly argues that the episome model, already demonstrated in leukemias, applies to solid tumors as well, and that dmin and hsr are two faces of the same coin. The organization of the duplicated segments varied from very simple (no apparent changes from the normal sequence) to very complex. MYCN was always overexpressed (significantly overexpressed in three cases). The fusion junctions, always mediated by nonhomologous end joining, occasionally juxtaposed truncated genes in the same transcriptional orientation. Fusion transcripts involving NBAS (also known as NAG), FAM49A, BC035112 (also known as NCRNA00276), and SMC6 genes were indeed detected, although their role in the context of the tumor is not clear.
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Wolf M, Korja M, Karhu R, Edgren H, Kilpinen S, Ojala K, Mousses S, Kallioniemi A, Haapasalo H. Array-based gene expression, CGH and tissue data defines a 12q24 gain in neuroblastic tumors with prognostic implication. BMC Cancer 2010; 10:181. [PMID: 20444257 PMCID: PMC2873396 DOI: 10.1186/1471-2407-10-181] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2009] [Accepted: 05/05/2010] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND Neuroblastoma has successfully served as a model system for the identification of neuroectoderm-derived oncogenes. However, in spite of various efforts, only a few clinically useful prognostic markers have been found. Here, we present a framework, which integrates DNA, RNA and tissue data to identify and prioritize genetic events that represent clinically relevant new therapeutic targets and prognostic biomarkers for neuroblastoma. METHODS A single-gene resolution aCGH profiling was integrated with microarray-based gene expression profiling data to distinguish genetic copy number alterations that were strongly associated with transcriptional changes in two neuroblastoma cell lines. FISH analysis using a hotspot tumor tissue microarray of 37 paraffin-embedded neuroblastoma samples and in silico data mining for gene expression information obtained from previously published studies including up to 445 healthy nervous system samples and 123 neuroblastoma samples were used to evaluate the clinical significance and transcriptional consequences of the detected alterations and to identify subsequently activated gene(s). RESULTS In addition to the anticipated high-level amplification and subsequent overexpression of MYCN, MEIS1, CDK4 and MDM2 oncogenes, the aCGH analysis revealed numerous other genetic alterations, including microamplifications at 2p and 12q24.11. Most interestingly, we identified and investigated the clinical relevance of a previously poorly characterized amplicon at 12q24.31. FISH analysis showed low-level gain of 12q24.31 in 14 of 33 (42%) neuroblastomas. Patients with the low-level gain had an intermediate prognosis in comparison to patients with MYCN amplification (poor prognosis) and to those with no MYCN amplification or 12q24.31 gain (good prognosis) (P = 0.001). Using the in silico data mining approach, we identified elevated expression of five genes located at the 12q24.31 amplicon in neuroblastoma (DIABLO, ZCCHC8, RSRC2, KNTC1 and MPHOSPH9). Among these, DIABLO showed the strongest activation suggesting a putative role in neuroblastoma progression. CONCLUSIONS The presented systematic and rapid framework, which integrates aCGH, gene expression and tissue data to obtain novel targets and biomarkers for cancer, identified a low-level gain of the 12q24.31 as a potential new biomarker for neuroblastoma progression. Furthermore, results of in silico data mining suggest a new neuroblastoma target gene, DIABLO, within this region, whose functional and therapeutic role remains to be elucidated in follow-up studies.
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Affiliation(s)
- Maija Wolf
- Institute for Molecular Medicine Finland (FIMM), University of Helsinki, Helsinki, Finland.
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Janoueix-Lerosey I, Schleiermacher G, Delattre O. Molecular pathogenesis of peripheral neuroblastic tumors. Oncogene 2010; 29:1566-79. [PMID: 20101209 DOI: 10.1038/onc.2009.518] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Neuroblastoma (NB) is an embryonal cancer of the sympathetic nervous system observed in early childhood, characterized by a broad spectrum of clinical behaviors, ranging from spontaneous regression to fatal outcome despite aggressive therapies. NB accounts for 8-10% of pediatric cancers and 15% of the deaths attributable to malignant conditions in children. Interestingly, NB may occur in various contexts, being mostly sporadic but also familial or syndromic. This review focuses on recent advances in the identification of the genes and mechanisms implicated in NB pathogenesis. Although the extensive characterization of the genomic aberrations recurrently observed in sporadic NBs provides important insights into the understanding of the clinical heterogeneity of this neoplasm, analysis of familial and syndromic cases also unravels essential clues on the genetic bases of NB. Recently, the ALK gene emerged as an important NB gene, being implicated both in sporadic and familial cases. The identification of gene expression signatures associated with patient's outcome points out the potential of using gene expression profiling to improve clinical management of patients suffering from NB. Finally, based on recent observations integrating genomic analyses, biological data and clinical information, we discuss possible evolution/progression schemes in NB.
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Affiliation(s)
- I Janoueix-Lerosey
- INSERM U830, Laboratoire de Génétique et Biologie des Cancers, Institut Curie, Paris Cedex 05, France.
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Camps J, Nguyen QT, Padilla-Nash HM, Knutsen T, McNeil NE, Wangsa D, Hummon AB, Grade M, Ried T, Difilippantonio MJ. Integrative genomics reveals mechanisms of copy number alterations responsible for transcriptional deregulation in colorectal cancer. Genes Chromosomes Cancer 2010; 48:1002-17. [PMID: 19691111 DOI: 10.1002/gcc.20699] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
To evaluate the mechanisms and consequences of chromosomal aberrations in colorectal cancer (CRC), we used a combination of spectral karyotyping, array comparative genomic hybridization (aCGH), and array-based global gene expression profiling on 31 primary carcinomas and 15 established cell lines. Importantly, aCGH showed that the genomic profiles of primary tumors are recapitulated in the cell lines. We revealed a preponderance of chromosome breakpoints at sites of copy number variants (CNVs) in the CRC cell lines, a novel mechanism of DNA breakage in cancer. The integration of gene expression and aCGH led to the identification of 157 genes localized within high-level copy number changes whose transcriptional deregulation was significantly affected across all of the samples, thereby suggesting that these genes play a functional role in CRC. Genomic amplification at 8q24 was the most recurrent event and led to the overexpression of MYC and FAM84B. Copy number dependent gene expression resulted in deregulation of known cancer genes such as APC, FGFR2, and ERBB2. The identification of only 36 genes whose localization near a breakpoint could account for their observed deregulated expression demonstrates that the major mechanism for transcriptional deregulation in CRC is genomic copy number changes resulting from chromosomal aberrations.
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Affiliation(s)
- Jordi Camps
- Genetics Branch, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, MD 20892, USA
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Santarius T, Shipley J, Brewer D, Stratton MR, Cooper CS. A census of amplified and overexpressed human cancer genes. Nat Rev Cancer 2010; 10:59-64. [PMID: 20029424 DOI: 10.1038/nrc2771] [Citation(s) in RCA: 410] [Impact Index Per Article: 29.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Integrated genome-wide screens of DNA copy number and gene expression in human cancers have accelerated the rate of discovery of amplified and overexpressed genes. However, the biological importance of most of the genes identified in such studies remains unclear. In this Analysis, we propose a weight-of-evidence based classification system for identifying individual genes in amplified regions that are selected for during tumour development. In a census of the published literature we have identified 77 genes for which there is good evidence of involvement in the development of human cancer.
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Affiliation(s)
- Thomas Santarius
- The Wellcome Trust Sanger Centre, Wellcome Trust Genome Campus Hinxton, Cambridge, UK
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35
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Abstract
Mutations of the retinoblastoma tumour suppressor gene (RB1) or components regulating the RB pathway have been identified in almost every human malignancy. The E2F transcription factors function in cell cycle control and are intimately regulated by RB. Studies of model organisms have revealed conserved functions for E2Fs during development, suggesting that the cancer-related proliferative roles of E2F family members represent a recent evolutionary adaptation. However, given that some human tumours have concurrent RB1 inactivation and E2F amplification and overexpression, we propose that there are alternative tumour-promoting activities for the E2F family, which are independent of cell cycle regulation.
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Affiliation(s)
- Hui-Zi Chen
- Human Cancer Genetics Program, Department of Molecular Virology, Immunology and Medical Genetics and Department of Molecular Genetics, The Ohio State University, Columbus, Ohio 43210, USA
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36
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Janoueix-Lerosey I, Delattre O. [ALK, a key gene in the pathogenesis of neuroblastoma]. Med Sci (Paris) 2009; 25:330-2. [PMID: 19409178 DOI: 10.1051/medsci/2009254330] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Wu JL, Yu YY. Role of chromosome structure variation in carcinogenesis and progression of gastric cancer. Shijie Huaren Xiaohua Zazhi 2008; 16:3642-3647. [DOI: 10.11569/wcjd.v16.i32.3642] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The carcinogenesis of gastric cancer is a multifactor process with many steps, of which, both the losing activity of tumor suppressor genes resulting from the abnormal structure of the chromosomes, and the activation of the oncogenes play important roles in these process. Therefore, identification of the tumor suppressor gene and oncogene through researching on the structural chromosomal abnormality has become an important means for the research of gastric cancer and oncology. This paper reviews the researches on current progresses on structural chromosomal abnormality in gastric cancer, especially on the aspect of methodology, and explained the application of various molecular genetics and molecular biology means used in structural chromosomal abnormality research. This paper aimed at providing references for the choice of researching methods for the readers.
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Janoueix-Lerosey I, Lequin D, Brugières L, Ribeiro A, de Pontual L, Combaret V, Raynal V, Puisieux A, Schleiermacher G, Pierron G, Valteau-Couanet D, Frebourg T, Michon J, Lyonnet S, Amiel J, Delattre O. Somatic and germline activating mutations of the ALK kinase receptor in neuroblastoma. Nature 2008; 455:967-70. [PMID: 18923523 DOI: 10.1038/nature07398] [Citation(s) in RCA: 648] [Impact Index Per Article: 40.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2008] [Accepted: 08/28/2008] [Indexed: 01/21/2023]
Abstract
Neuroblastoma, a tumour derived from the peripheral sympathetic nervous system, is one of the most frequent solid tumours in childhood. It usually occurs sporadically but familial cases are observed, with a subset of cases occurring in association with congenital malformations of the neural crest being linked to germline mutations of the PHOX2B gene. Here we conducted genome-wide comparative genomic hybridization analysis on a large series of neuroblastomas. Copy number increase at the locus encoding the anaplastic lymphoma kinase (ALK) tyrosine kinase receptor was observed recurrently. One particularly informative case presented a high-level gene amplification that was strictly limited to ALK, indicating that this gene may contribute on its own to neuroblastoma development. Through subsequent direct sequencing of cell lines and primary tumour DNAs we identified somatic mutations of the ALK kinase domain that mainly clustered in two hotspots. Germline mutations were observed in two neuroblastoma families, indicating that ALK is a neuroblastoma predisposition gene. Mutated ALK proteins were overexpressed, hyperphosphorylated and showed constitutive kinase activity. The knockdown of ALK expression in ALK-mutated cells, but also in cell lines overexpressing a wild-type ALK, led to a marked decrease of cell proliferation. Altogether, these data identify ALK as a critical player in neuroblastoma development that may hence represent a very attractive therapeutic target in this disease that is still frequently fatal with current treatments.
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