ALBERT

Description: Medulloblastoma, the most common malignant paediatric brain tumour, arises in the cerebellum and disseminates through the cerebrospinal fluid in the leptomeningeal space to coat the brain and spinal cord. Dissemination, a marker of poor prognosis, is found in up to 40% of children at diagnosis and in most children at the time of recurrence. Affected children therefore are treated with radiation to the entire developing brain and spinal cord, followed by high-dose chemotherapy, with the ensuing deleterious effects on the developing nervous system. The mechanisms of dissemination through the cerebrospinal fluid are poorly studied, and medulloblastoma metastases have been assumed to be biologically similar to the primary tumour. Here we show that in both mouse and human medulloblastoma, the metastases from an individual are extremely similar to each other but are divergent from the matched primary tumour. Clonal genetic events in the metastases can be demonstrated in a restricted subclone of the primary tumour, suggesting that only rare cells within the primary tumour have the ability to metastasize. Failure to account for the bicompartmental nature of metastatic medulloblastoma could be a major barrier to the development of effective targeted therapies.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3288636/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3288636/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wu, Xiaochong -- Northcott, Paul A -- Dubuc, Adrian -- Dupuy, Adam J -- Shih, David J H -- Witt, Hendrik -- Croul, Sidney -- Bouffet, Eric -- Fults, Daniel W -- Eberhart, Charles G -- Garzia, Livia -- Van Meter, Timothy -- Zagzag, David -- Jabado, Nada -- Schwartzentruber, Jeremy -- Majewski, Jacek -- Scheetz, Todd E -- Pfister, Stefan M -- Korshunov, Andrey -- Li, Xiao-Nan -- Scherer, Stephen W -- Cho, Yoon-Jae -- Akagi, Keiko -- MacDonald, Tobey J -- Koster, Jan -- McCabe, Martin G -- Sarver, Aaron L -- Collins, V Peter -- Weiss, William A -- Largaespada, David A -- Collier, Lara S -- Taylor, Michael D -- K01CA122183/CA/NCI NIH HHS/ -- NS055089/NS/NINDS NIH HHS/ -- R01 CA108622/CA/NCI NIH HHS/ -- R01 CA113636/CA/NCI NIH HHS/ -- R01 CA148699/CA/NCI NIH HHS/ -- R01 CA148699-03/CA/NCI NIH HHS/ -- R01 NS055089/NS/NINDS NIH HHS/ -- R01CA148699/CA/NCI NIH HHS/ -- Canadian Institutes of Health Research/Canada -- England -- Nature. 2012 Feb 15;482(7386):529-33. doi: 10.1038/nature10825.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Arthur and Sonia Labatt Brain Tumour Research Center, Program in Developmental and Stem Cell Biology, The Hospital for Sick Children, Toronto, Ontario M5G 1X8, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22343890" target="_blank"〉PubMed〈/a〉

Description: Ependymomas are common childhood brain tumours that occur throughout the nervous system, but are most common in the paediatric hindbrain. Current standard therapy comprises surgery and radiation, but not cytotoxic chemotherapy as it does not further increase survival. Whole-genome and whole-exome sequencing of 47 hindbrain ependymomas reveals an extremely low mutation rate, and zero significant recurrent somatic single nucleotide variants. Although devoid of recurrent single nucleotide variants and focal copy number aberrations, poor-prognosis hindbrain ependymomas exhibit a CpG island methylator phenotype. Transcriptional silencing driven by CpG methylation converges exclusively on targets of the Polycomb repressive complex 2 which represses expression of differentiation genes through trimethylation of H3K27. CpG island methylator phenotype-positive hindbrain ependymomas are responsive to clinical drugs that target either DNA or H3K27 methylation both in vitro and in vivo. We conclude that epigenetic modifiers are the first rational therapeutic candidates for this deadly malignancy, which is epigenetically deregulated but genetically bland.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4174313/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4174313/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Mack, S C -- Witt, H -- Piro, R M -- Gu, L -- Zuyderduyn, S -- Stutz, A M -- Wang, X -- Gallo, M -- Garzia, L -- Zayne, K -- Zhang, X -- Ramaswamy, V -- Jager, N -- Jones, D T W -- Sill, M -- Pugh, T J -- Ryzhova, M -- Wani, K M -- Shih, D J H -- Head, R -- Remke, M -- Bailey, S D -- Zichner, T -- Faria, C C -- Barszczyk, M -- Stark, S -- Seker-Cin, H -- Hutter, S -- Johann, P -- Bender, S -- Hovestadt, V -- Tzaridis, T -- Dubuc, A M -- Northcott, P A -- Peacock, J -- Bertrand, K C -- Agnihotri, S -- Cavalli, F M G -- Clarke, I -- Nethery-Brokx, K -- Creasy, C L -- Verma, S K -- Koster, J -- Wu, X -- Yao, Y -- Milde, T -- Sin-Chan, P -- Zuccaro, J -- Lau, L -- Pereira, S -- Castelo-Branco, P -- Hirst, M -- Marra, M A -- Roberts, S S -- Fults, D -- Massimi, L -- Cho, Y J -- Van Meter, T -- Grajkowska, W -- Lach, B -- Kulozik, A E -- von Deimling, A -- Witt, O -- Scherer, S W -- Fan, X -- Muraszko, K M -- Kool, M -- Pomeroy, S L -- Gupta, N -- Phillips, J -- Huang, A -- Tabori, U -- Hawkins, C -- Malkin, D -- Kongkham, P N -- Weiss, W A -- Jabado, N -- Rutka, J T -- Bouffet, E -- Korbel, J O -- Lupien, M -- Aldape, K D -- Bader, G D -- Eils, R -- Lichter, P -- Dirks, P B -- Pfister, S M -- Korshunov, A -- Taylor, M D -- P30 CA016672/CA/NCI NIH HHS/ -- P50 CA097257/CA/NCI NIH HHS/ -- R01 CA121941/CA/NCI NIH HHS/ -- R01 CA148621/CA/NCI NIH HHS/ -- R01 CA163737/CA/NCI NIH HHS/ -- R01CA148699/CA/NCI NIH HHS/ -- R01CA159859/CA/NCI NIH HHS/ -- Canadian Institutes of Health Research/Canada -- England -- Nature. 2014 Feb 27;506(7489):445-50. doi: 10.1038/nature13108. Epub 2014 Feb 19.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Developmental & Stem Cell Biology Program, Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Ontario M5G 1L7, Canada [2] Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario M5S 1A8, Canada [3] Division of Neurosurgery, University of Toronto, Toronto, Ontario M5S 1A8, Canada [4]. ; 1] Division of Pediatric Neurooncology, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany [2] Department of Pediatric Oncology, Hematology and Immunology, University of Heidelberg, Heidelberg 69120, Germany [3] German Cancer Consortium (DKTK), Heidelberg 69120, Germany [4]. ; 1] German Cancer Consortium (DKTK), Heidelberg 69120, Germany [2] Division of Molecular Genetics, German Cancer Research Center (DKFZ), Heidelberg 69120, Germany. ; 1] German Cancer Consortium (DKTK), Heidelberg 69120, Germany [2] Division of Theoretical Bioinformatics, German Cancer Research Center (DKFZ), Heidelberg 69120, Germany. ; Department of Molecular Genetics, Banting and Best Department of Medical Research, The Donnelly Centre, University of Toronto, Toronto, Ontario M4N 1X8, Canada. ; 1] German Cancer Consortium (DKTK), Heidelberg 69120, Germany [2] Genome Biology, European Molecular Biology, Laboratory Meyerhofstr. 1, Heidelberg 69117, Germany. ; 1] Developmental & Stem Cell Biology Program, Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Ontario M5G 1L7, Canada [2] Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario M5S 1A8, Canada. ; Developmental & Stem Cell Biology Program, Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Ontario M5G 1L7, Canada. ; Department of Genetics, Norris Cotton Cancer Center, Dartmouth Medical School, Lebanon, New Hampshire 03756, USA. ; 1] Division of Pediatric Neurooncology, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany [2] German Cancer Consortium (DKTK), Heidelberg 69120, Germany. ; 1] German Cancer Consortium (DKTK), Heidelberg 69120, Germany [2] Division of Bioinformatics, German Cancer Research Center (DKFZ), Heidelberg 69120, Germany. ; Department of Neurology, Harvard Medical School, Children's Hospital Boston, MIT, Boston, Massachusetts 02115, USA. ; Department of Pathology, The University of Texas MD Anderson Cancer Center, Houston, Texas 77030, USA. ; 1] Ontario Cancer Institute, Princess Margaret Cancer Centre-University Health Network, Toronto, Ontario M5G 1L7, Canada [2] Ontario Institute for Cancer Research, Toronto, Ontario M5G 1L7, Canada. ; Cancer Epigenetics Discovery Performance Unit, GlaxoSmithKline Pharmaceuticals, Collegeville, Pennsylvania 19426, USA. ; Department of Oncogenomics, Academic Medical Center, Amsterdam 1105, The Netherlands. ; 1] Department of Pediatric Oncology, Hematology and Immunology, University of Heidelberg, Heidelberg 69120, Germany [2] German Cancer Consortium (DKTK), Heidelberg 69120, Germany [3] CCU Pediatric Oncology, German Cancer Research Center (DKFZ), Heidelberg 69120, Germany. ; 1] Centre for High-Throughput Biology, Department of Microbiology & Immunology, University of British Columbia, Vancouver, V6T 1Z4 British Columbia, Canada [2] Canada's Michael Smith Genome Sciences Centre, BC Cancer Agency, Vancouver, British Columbia V5Z 1L3, Canada. ; 1] Canada's Michael Smith Genome Sciences Centre, BC Cancer Agency, Vancouver, British Columbia V5Z 1L3, Canada [2] Department of Medical Genetics, University of British Columbia, Vancouver, British Columbia V6H 3N1, Canada. ; Department of Pediatrics and National Capital Consortium, Uniformed Services University, Bethesda, Maryland 20814, USA. ; Department of Neurosurgery, University of Utah School of Medicine, Salt Lake City, Utah 84132, USA. ; Pediatric Neurosurgery, Catholic University Medical School, Gemelli Hospital, Rome 00168, Italy. ; Department of Neurology and Neurological Sciences, Stanford University School of Medicine, Stanford, California 94305, USA. ; Department of Pediatrics, Virginia Commonwealth, Richmond, Virginia 23298-0646, USA. ; Department of Pathology, University of Warsaw, Children's Memorial Health Institute University of Warsaw, Warsaw 04-730, Poland. ; Division of Anatomical Pathology, Department of Pathology and Molecular Medicine, McMaster University, Hamilton General Hospital, Hamilton, Ontario L8S 4K1, Canada. ; 1] Department of Pediatric Oncology, Hematology and Immunology, University of Heidelberg, Heidelberg 69120, Germany [2] German Cancer Consortium (DKTK), Heidelberg 69120, Germany. ; 1] German Cancer Consortium (DKTK), Heidelberg 69120, Germany [2] Department of Neuropathology Ruprecht-Karls-University Heidelberg, Institute of Pathology, Heidelberg 69120, Germany. ; 1] University of Michigan Cell and Developmental Biology, Ann Arbor, Michigan 48109-2200, USA [2] Department of Neurosurgery, University of Michigan Medical School, Ann Arbor, Michigan 48109, USA. ; Department of Neurosurgery, University of Michigan Medical School, Ann Arbor, Michigan 48109, USA. ; Department of Neurosurgery, University of California San Francisco, San Francisco, California 94143-0112, USA. ; Departments of Neurology, Pediatrics, and Neurosurgery, University of California, San Francisco, The Helen Diller Family Cancer Research Building, San Francisco, California 94158, USA. ; 1] Developmental & Stem Cell Biology Program, Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Ontario M5G 1L7, Canada [2] Department of Neuro-oncology, The Hospital for Sick Children, Toronto, Ontario M5G 1X8, Canada. ; Department of Haematology and Oncology, The Hospital for Sick Children, Toronto, Ontario M5G 1X8, Canada. ; 1] Developmental & Stem Cell Biology Program, Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Ontario M5G 1L7, Canada [2] Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario M5S 1A8, Canada [3] Division of Neurosurgery, University of Toronto, Toronto, Ontario M5S 1A8, Canada. ; Departments of Pediatrics and Human Genetics, McGill University and the McGill University Health Center Research Institute, Montreal, Quebec H3Z 2Z3, Canada. ; Department of Neuro-oncology, The Hospital for Sick Children, Toronto, Ontario M5G 1X8, Canada. ; Genome Biology, European Molecular Biology, Laboratory Meyerhofstr. 1, Heidelberg 69117, Germany. ; 1] Ontario Cancer Institute, Princess Margaret Cancer Centre-University Health Network, Toronto, Ontario M5G 1L7, Canada [2] Ontario Institute for Cancer Research, Toronto, Ontario M5G 1L7, Canada [3] Department of Medical Biophysics, University of Toronto, Toronto, Ontario M5G 1X8, Canada. ; 1] Developmental & Stem Cell Biology Program, Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Ontario M5G 1L7, Canada [2] Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario M5S 1A8, Canada [3] Division of Neurosurgery, University of Toronto, Toronto, Ontario M5S 1A8, Canada [4] Department of Molecular Genetics, University of Toronto, Toronto, Ontario M5S 1A8, Canada. ; 1] Division of Pediatric Neurooncology, German Cancer Research Center (DKFZ), 69120 Heidelberg, Germany [2] Department of Pediatric Oncology, Hematology and Immunology, University of Heidelberg, Heidelberg 69120, Germany [3] German Cancer Consortium (DKTK), Heidelberg 69120, Germany. ; 1] German Cancer Consortium (DKTK), Heidelberg 69120, Germany [2] University of Michigan Cell and Developmental Biology, Ann Arbor, Michigan 48109-2200, USA [3] CCU Neuropathology, German Cancer Research Center (DKFZ), Heidelberg 69120, Germany.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24553142" target="_blank"〉PubMed〈/a〉