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  • 1
    Publikationsdatum: 2012-12-15
    Beschreibung: Intratumoral heterogeneity arises through the evolution of genetically diverse subclones during tumor progression. However, it remains unknown whether cells within single genetic clones are functionally equivalent. By combining DNA copy number alteration (CNA) profiling, sequencing, and lentiviral lineage tracking, we followed the repopulation dynamics of 150 single lentivirus-marked lineages from 10 human colorectal cancers through serial xenograft passages in mice. CNA and mutational analysis distinguished individual clones and showed that clones remained stable upon serial transplantation. Despite this stability, the proliferation, persistence, and chemotherapy tolerance of lentivirally marked lineages were variable within each clone. Chemotherapy promoted the dominance of previously minor or dormant lineages. Thus, apart from genetic diversity, tumor cells display inherent functional variability in tumor propagation potential, which contributes to both cancer growth and therapy tolerance.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kreso, Antonija -- O'Brien, Catherine A -- van Galen, Peter -- Gan, Olga I -- Notta, Faiyaz -- Brown, Andrew M K -- Ng, Karen -- Ma, Jing -- Wienholds, Erno -- Dunant, Cyrille -- Pollett, Aaron -- Gallinger, Steven -- McPherson, John -- Mullighan, Charles G -- Shibata, Darryl -- Dick, John E -- R21 CA149990/CA/NCI NIH HHS/ -- R21CA149990-01/CA/NCI NIH HHS/ -- Canadian Institutes of Health Research/Canada -- New York, N.Y. -- Science. 2013 Feb 1;339(6119):543-8. doi: 10.1126/science.1227670. Epub 2012 Dec 13.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Campbell Family Institute, Ontario Cancer Institute, Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23239622" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Cell Lineage ; Cell Tracking ; Clonal Evolution/*genetics ; Clone Cells ; Colorectal Neoplasms/*drug therapy/genetics/*pathology ; DNA Copy Number Variations ; Drug Resistance, Neoplasm/*genetics ; Humans ; Lentivirus ; Mice ; Neoplasm Transplantation ; Transcriptome ; Transduction, Genetic ; Tumor Cells, Cultured
    Print ISSN: 0036-8075
    Digitale ISSN: 1095-9203
    Thema: Biologie , Chemie und Pharmazie , Informatik , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Publikationsdatum: 2011-01-21
    Beschreibung: Many tumours are composed of genetically diverse cells; however, little is known about how diversity evolves or the impact that diversity has on functional properties. Here, using xenografting and DNA copy number alteration (CNA) profiling of human BCR-ABL1 lymphoblastic leukaemia, we demonstrate that genetic diversity occurs in functionally defined leukaemia-initiating cells and that many diagnostic patient samples contain multiple genetically distinct leukaemia-initiating cell subclones. Reconstructing the subclonal genetic ancestry of several samples by CNA profiling demonstrated a branching multi-clonal evolution model of leukaemogenesis, rather than linear succession. For some patient samples, the predominant diagnostic clone repopulated xenografts, whereas in others it was outcompeted by minor subclones. Reconstitution with the predominant diagnosis clone was associated with more aggressive growth properties in xenografts, deletion of CDKN2A and CDKN2B, and a trend towards poorer patient outcome. Our findings link clonal diversity with leukaemia-initiating-cell function and underscore the importance of developing therapies that eradicate all intratumoral subclones.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Notta, Faiyaz -- Mullighan, Charles G -- Wang, Jean C Y -- Poeppl, Armando -- Doulatov, Sergei -- Phillips, Letha A -- Ma, Jing -- Minden, Mark D -- Downing, James R -- Dick, John E -- Canadian Institutes of Health Research/Canada -- England -- Nature. 2011 Jan 20;469(7330):362-7. doi: 10.1038/nature09733.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Division of Stem Cell and Developmental Biology, Campbell Family Institute for Cancer Research/Ontario Cancer Institute, Toronto, Ontario M5G 1L7, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21248843" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Cell Survival ; Clone Cells/*metabolism/*pathology ; Cyclin-Dependent Kinase Inhibitor p15/deficiency/genetics ; DNA Copy Number Variations/genetics ; Disease Progression ; *Evolution, Molecular ; Fusion Proteins, bcr-abl/*genetics ; Genes, p16 ; Humans ; Mice ; Mice, Inbred NOD ; Mice, SCID ; Models, Biological ; Neoplasm Transplantation ; Oligonucleotide Array Sequence Analysis ; Philadelphia Chromosome ; Polymorphism, Single Nucleotide/genetics ; Precursor Cell Lymphoblastic Leukemia-Lymphoma/*genetics/*pathology ; Survival Rate ; Transplantation, Heterologous
    Print ISSN: 0028-0836
    Digitale ISSN: 1476-4687
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Publikationsdatum: 2014-08-19
    Beschreibung: T-cell acute lymphoblastic leukaemia (T-ALL) is a haematological malignancy with a dismal overall prognosis, including a relapse rate of up to 25%, mainly because of the lack of non-cytotoxic targeted therapy options. Drugs that target the function of key epigenetic factors have been approved in the context of haematopoietic disorders, and mutations that affect chromatin modulators in a variety of leukaemias have recently been identified; however, 'epigenetic' drugs are not currently used for T-ALL treatment. Recently, we described that the polycomb repressive complex 2 (PRC2) has a tumour-suppressor role in T-ALL. Here we delineated the role of the histone 3 lysine 27 (H3K27) demethylases JMJD3 and UTX in T-ALL. We show that JMJD3 is essential for the initiation and maintenance of T-ALL, as it controls important oncogenic gene targets by modulating H3K27 methylation. By contrast, we found that UTX functions as a tumour suppressor and is frequently genetically inactivated in T-ALL. Moreover, we demonstrated that the small molecule inhibitor GSKJ4 (ref. 5) affects T-ALL growth, by targeting JMJD3 activity. These findings show that two proteins with a similar enzymatic function can have opposing roles in the context of the same disease, paving the way for treating haematopoietic malignancies with a new category of epigenetic inhibitors.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4209203/" 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/PMC4209203/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ntziachristos, Panagiotis -- Tsirigos, Aristotelis -- Welstead, G Grant -- Trimarchi, Thomas -- Bakogianni, Sofia -- Xu, Luyao -- Loizou, Evangelia -- Holmfeldt, Linda -- Strikoudis, Alexandros -- King, Bryan -- Mullenders, Jasper -- Becksfort, Jared -- Nedjic, Jelena -- Paietta, Elisabeth -- Tallman, Martin S -- Rowe, Jacob M -- Tonon, Giovanni -- Satoh, Takashi -- Kruidenier, Laurens -- Prinjha, Rab -- Akira, Shizuo -- Van Vlierberghe, Pieter -- Ferrando, Adolfo A -- Jaenisch, Rudolf -- Mullighan, Charles G -- Aifantis, Iannis -- 1R01CA105129/CA/NCI NIH HHS/ -- 1R01CA133379/CA/NCI NIH HHS/ -- 1R01CA149655/CA/NCI NIH HHS/ -- 5 T32 CA009161-37/CA/NCI NIH HHS/ -- 5P30CA16087-31/CA/NCI NIH HHS/ -- 5R01CA169784/CA/NCI NIH HHS/ -- 5R01CA173636/CA/NCI NIH HHS/ -- K99 CA188293/CA/NCI NIH HHS/ -- K99CA188293/CA/NCI NIH HHS/ -- P30 CA014051/CA/NCI NIH HHS/ -- P30 CA016087/CA/NCI NIH HHS/ -- P30 CA016087-30/CA/NCI NIH HHS/ -- P30 CA021765/CA/NCI NIH HHS/ -- R01 CA105129/CA/NCI NIH HHS/ -- R01 CA133379/CA/NCI NIH HHS/ -- R01 CA149655/CA/NCI NIH HHS/ -- R01 CA173636/CA/NCI NIH HHS/ -- R01CA120196/CA/NCI NIH HHS/ -- R37 HD045022/HD/NICHD NIH HHS/ -- R37-HD04502/HD/NICHD NIH HHS/ -- U10 CA180820/CA/NCI NIH HHS/ -- U10 CA180827/CA/NCI NIH HHS/ -- U10 CA21115/CA/NCI NIH HHS/ -- U24 CA114737/CA/NCI NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2014 Oct 23;514(7523):513-7. doi: 10.1038/nature13605. Epub 2014 Aug 17.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Howard Hughes Medical Institute and Department of Pathology, NYU School of Medicine, New York, New York 10016, USA [2] NYU Cancer Institute and Helen L. and Martin S. Kimmel Center for Stem Cell Biology, NYU School of Medicine, New York, New York 10016, USA [3]. ; 1] Howard Hughes Medical Institute and Department of Pathology, NYU School of Medicine, New York, New York 10016, USA [2] Center for Health Informatics and Bioinformatics, NYU School of Medicine, New York, New York 10016, USA [3]. ; 1] Whitehead Institute for Biomedical Research, Cambridge, Massachusetts 02142, USA [2] Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA [3]. ; 1] Howard Hughes Medical Institute and Department of Pathology, NYU School of Medicine, New York, New York 10016, USA [2] NYU Cancer Institute and Helen L. and Martin S. Kimmel Center for Stem Cell Biology, NYU School of Medicine, New York, New York 10016, USA. ; Institute for Cancer Genetics, Columbia University Medical Center, New York, New York 10032, USA. ; Department of Pathology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA. ; Department of Computational Biology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA. ; Montefiore Medical Center North, Bronx, New York, New York 10467, USA. ; Memorial Sloan Kettering Cancer Center, New York, New York 10065, USA. ; 1] Technion, Israel Institute of Technology, Haifa 31096, Israel [2] Shaare Zedek Medical Center, Jerusalem 9103102, Israel. ; Functional Genomics of Cancer Unit, Division of Molecular Oncology, Istituto di Ricovero e Cura a Carattere Scientifico (IRCCS) San Raffaele Scientific Institute, 20132 Milan, Italy. ; 1] Laboratory of Host Defense, WPI Immunology Frontier Research Center (WPI IFReC), Osaka University, 3-1 Yamada-oka, Suita, Osaka 565-0871, Japan [2] Department of Host Defense, Research Institute for Microbial Diseases (RIMD), Osaka University, 3-1Yamada-oka, Suita, Osaka 565-0871, Japan. ; Epinova DPU, Immuno-Inflammation Therapy Area, GlaxoSmithKline R&D, Medicines Research Centre, GunnelsWood Road, Stevenage SG1 2NY, UK. ; 1] Institute for Cancer Genetics, Columbia University Medical Center, New York, New York 10032, USA [2] Center for Medical Genetics, Ghent University Hospital, 9000 Ghent, Belgium. ; 1] Institute for Cancer Genetics, Columbia University Medical Center, New York, New York 10032, USA [2] Department of Pathology, Columbia University Medical Center, New York, New York 10032, USA [3] Department of Pediatrics, Columbia University Medical Center, New York, New York 10032, USA. ; 1] Whitehead Institute for Biomedical Research, Cambridge, Massachusetts 02142, USA [2] Department of Biology, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25132549" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Animals ; Benzazepines/pharmacology ; Epigenesis, Genetic/drug effects ; Histone Demethylases/genetics/*metabolism ; Histones/chemistry/metabolism ; Jumonji Domain-Containing Histone Demethylases/antagonists & ; inhibitors/*metabolism ; Lysine/metabolism ; Methylation/drug effects ; Mice ; Precursor Cell Lymphoblastic Leukemia-Lymphoma/drug ; therapy/*enzymology/genetics/pathology ; Pyrimidines/pharmacology ; Tumor Suppressor Proteins/genetics/metabolism
    Print ISSN: 0028-0836
    Digitale ISSN: 1476-4687
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Publikationsdatum: 2011-03-11
    Beschreibung: B-cell non-Hodgkin's lymphoma comprises biologically and clinically distinct diseases the pathogenesis of which is associated with genetic lesions affecting oncogenes and tumour-suppressor genes. We report here that the two most common types--follicular lymphoma and diffuse large B-cell lymphoma--harbour frequent structural alterations inactivating CREBBP and, more rarely, EP300, two highly related histone and non-histone acetyltransferases (HATs) that act as transcriptional co-activators in multiple signalling pathways. Overall, about 39% of diffuse large B-cell lymphoma and 41% of follicular lymphoma cases display genomic deletions and/or somatic mutations that remove or inactivate the HAT coding domain of these two genes. These lesions usually affect one allele, suggesting that reduction in HAT dosage is important for lymphomagenesis. We demonstrate specific defects in acetylation-mediated inactivation of the BCL6 oncoprotein and activation of the p53 tumour suppressor. These results identify CREBBP/EP300 mutations as a major pathogenetic mechanism shared by common forms of B-cell non-Hodgkin's lymphoma, with direct implications for the use of drugs targeting acetylation/deacetylation mechanisms.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3271441/" 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/PMC3271441/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pasqualucci, Laura -- Dominguez-Sola, David -- Chiarenza, Annalisa -- Fabbri, Giulia -- Grunn, Adina -- Trifonov, Vladimir -- Kasper, Lawryn H -- Lerach, Stephanie -- Tang, Hongyan -- Ma, Jing -- Rossi, Davide -- Chadburn, Amy -- Murty, Vundavalli V -- Mullighan, Charles G -- Gaidano, Gianluca -- Rabadan, Raul -- Brindle, Paul K -- Dalla-Favera, Riccardo -- 1R01LM010140-01/LM/NLM NIH HHS/ -- DE018183/DE/NIDCR NIH HHS/ -- P01 CA092625/CA/NCI NIH HHS/ -- P01 CA092625-05/CA/NCI NIH HHS/ -- P01-CA092625/CA/NCI NIH HHS/ -- P30 CA021765/CA/NCI NIH HHS/ -- R01-CA37295/CA/NCI NIH HHS/ -- R37 CA037295/CA/NCI NIH HHS/ -- R37 CA037295-28/CA/NCI NIH HHS/ -- U54-AI057158/AI/NIAID NIH HHS/ -- England -- Nature. 2011 Mar 10;471(7337):189-95. doi: 10.1038/nature09730.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Cancer Genetics, Herbert Irving Comprehensive Cancer Center, Columbia University, New York, New York 10032, USA. lp171@columbia.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21390126" target="_blank"〉PubMed〈/a〉
    Schlagwort(e): Acetyl Coenzyme A/metabolism ; Acetylation ; Acetyltransferases/chemistry/deficiency/*genetics/*metabolism ; Animals ; Base Sequence ; CREB-Binding Protein/chemistry/deficiency/*genetics/metabolism ; Cells, Cultured ; DNA-Binding Proteins/metabolism ; E1A-Associated p300 Protein/chemistry/deficiency/*genetics/metabolism ; Gene Expression Regulation, Neoplastic ; HEK293 Cells ; Histone Acetyltransferases/chemistry/deficiency/genetics/metabolism ; Humans ; Lymphoma, B-Cell/*enzymology/*genetics/pathology ; Lymphoma, Follicular/enzymology/genetics/pathology ; Lymphoma, Large B-Cell, Diffuse/enzymology/genetics/pathology ; Mice ; Mutation/*genetics ; Mutation, Missense/genetics ; Polymorphism, Single Nucleotide/genetics ; Protein Binding ; Protein Structure, Tertiary/genetics ; Recurrence ; Sequence Deletion/genetics ; Tumor Suppressor Protein p53/metabolism
    Print ISSN: 0028-0836
    Digitale ISSN: 1476-4687
    Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik
    Standort Signatur Erwartet Verfügbarkeit
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