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  • 1
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    Pancreatic cancer genomes reveal aberrations in axon guidance pathway genes (2012)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2012-10-30
    Description: Pancreatic cancer is a highly lethal malignancy with few effective therapies. We performed exome sequencing and copy number analysis to define genomic aberrations in a prospectively accrued clinical cohort (n = 142) of early (stage I and II) sporadic pancreatic ductal adenocarcinoma. Detailed analysis of 99 informative tumours identified substantial heterogeneity with 2,016 non-silent mutations and 1,628 copy-number variations. We define 16 significantly mutated genes, reaffirming known mutations (KRAS, TP53, CDKN2A, SMAD4, MLL3, TGFBR2, ARID1A and SF3B1), and uncover novel mutated genes including additional genes involved in chromatin modification (EPC1 and ARID2), DNA damage repair (ATM) and other mechanisms (ZIM2, MAP2K4, NALCN, SLC16A4 and MAGEA6). Integrative analysis with in vitro functional data and animal models provided supportive evidence for potential roles for these genetic aberrations in carcinogenesis. Pathway-based analysis of recurrently mutated genes recapitulated clustering in core signalling pathways in pancreatic ductal adenocarcinoma, and identified new mutated genes in each pathway. We also identified frequent and diverse somatic aberrations in genes described traditionally as embryonic regulators of axon guidance, particularly SLIT/ROBO signalling, which was also evident in murine Sleeping Beauty transposon-mediated somatic mutagenesis models of pancreatic cancer, providing further supportive evidence for the potential involvement of axon guidance genes in pancreatic carcinogenesis.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3530898/" 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/PMC3530898/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Biankin, Andrew V -- Waddell, Nicola -- Kassahn, Karin S -- Gingras, Marie-Claude -- Muthuswamy, Lakshmi B -- Johns, Amber L -- Miller, David K -- Wilson, Peter J -- Patch, Ann-Marie -- Wu, Jianmin -- Chang, David K -- Cowley, Mark J -- Gardiner, Brooke B -- Song, Sarah -- Harliwong, Ivon -- Idrisoglu, Senel -- Nourse, Craig -- Nourbakhsh, Ehsan -- Manning, Suzanne -- Wani, Shivangi -- Gongora, Milena -- Pajic, Marina -- Scarlett, Christopher J -- Gill, Anthony J -- Pinho, Andreia V -- Rooman, Ilse -- Anderson, Matthew -- Holmes, Oliver -- Leonard, Conrad -- Taylor, Darrin -- Wood, Scott -- Xu, Qinying -- Nones, Katia -- Fink, J Lynn -- Christ, Angelika -- Bruxner, Tim -- Cloonan, Nicole -- Kolle, Gabriel -- Newell, Felicity -- Pinese, Mark -- Mead, R Scott -- Humphris, Jeremy L -- Kaplan, Warren -- Jones, Marc D -- Colvin, Emily K -- Nagrial, Adnan M -- Humphrey, Emily S -- Chou, Angela -- Chin, Venessa T -- Chantrill, Lorraine A -- Mawson, Amanda -- Samra, Jaswinder S -- Kench, James G -- Lovell, Jessica A -- Daly, Roger J -- Merrett, Neil D -- Toon, Christopher -- Epari, Krishna -- Nguyen, Nam Q -- Barbour, Andrew -- Zeps, Nikolajs -- Australian Pancreatic Cancer Genome Initiative -- Kakkar, Nipun -- Zhao, Fengmei -- Wu, Yuan Qing -- Wang, Min -- Muzny, Donna M -- Fisher, William E -- Brunicardi, F Charles -- Hodges, Sally E -- Reid, Jeffrey G -- Drummond, Jennifer -- Chang, Kyle -- Han, Yi -- Lewis, Lora R -- Dinh, Huyen -- Buhay, Christian J -- Beck, Timothy -- Timms, Lee -- Sam, Michelle -- Begley, Kimberly -- Brown, Andrew -- Pai, Deepa -- Panchal, Ami -- Buchner, Nicholas -- De Borja, Richard -- Denroche, Robert E -- Yung, Christina K -- Serra, Stefano -- Onetto, Nicole -- Mukhopadhyay, Debabrata -- Tsao, Ming-Sound -- Shaw, Patricia A -- Petersen, Gloria M -- Gallinger, Steven -- Hruban, Ralph H -- Maitra, Anirban -- Iacobuzio-Donahue, Christine A -- Schulick, Richard D -- Wolfgang, Christopher L -- Morgan, Richard A -- Lawlor, Rita T -- Capelli, Paola -- Corbo, Vincenzo -- Scardoni, Maria -- Tortora, Giampaolo -- Tempero, Margaret A -- Mann, Karen M -- Jenkins, Nancy A -- Perez-Mancera, Pedro A -- Adams, David J -- Largaespada, David A -- Wessels, Lodewyk F A -- Rust, Alistair G -- Stein, Lincoln D -- Tuveson, David A -- Copeland, Neal G -- Musgrove, Elizabeth A -- Scarpa, Aldo -- Eshleman, James R -- Hudson, Thomas J -- Sutherland, Robert L -- Wheeler, David A -- Pearson, John V -- McPherson, John D -- Gibbs, Richard A -- Grimmond, Sean M -- 13031/Cancer Research UK/United Kingdom -- 2P50CA101955/CA/NCI NIH HHS/ -- P01CA134292/CA/NCI NIH HHS/ -- P50 CA101955/CA/NCI NIH HHS/ -- P50 CA102701/CA/NCI NIH HHS/ -- P50CA062924/CA/NCI NIH HHS/ -- R01 CA097075/CA/NCI NIH HHS/ -- R01 CA97075/CA/NCI NIH HHS/ -- U54 HG003273/HG/NHGRI NIH HHS/ -- Cancer Research UK/United Kingdom -- Wellcome Trust/United Kingdom -- England -- Nature. 2012 Nov 15;491(7424):399-405. doi: 10.1038/nature11547. Epub 2012 Oct 24.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Kinghorn Cancer Centre, 370 Victoria Street, Darlinghurst, Sydney, New South Wales 2010, Australia.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23103869" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Axons/*metabolism ; Carcinoma, Pancreatic Ductal/*genetics/*pathology ; Gene Dosage ; Gene Expression Regulation, Neoplastic ; Genome/*genetics ; Humans ; Kaplan-Meier Estimate ; Mice ; Mutation ; Pancreatic Neoplasms/*genetics/*pathology ; Proteins/genetics ; Signal Transduction
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 2
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    Seventy-five genetic loci influencing the human red blood cell (2012)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2012-12-12
    Description: Anaemia is a chief determinant of global ill health, contributing to cognitive impairment, growth retardation and impaired physical capacity. To understand further the genetic factors influencing red blood cells, we carried out a genome-wide association study of haemoglobin concentration and related parameters in up to 135,367 individuals. Here we identify 75 independent genetic loci associated with one or more red blood cell phenotypes at P 〈 10(-8), which together explain 4-9% of the phenotypic variance per trait. Using expression quantitative trait loci and bioinformatic strategies, we identify 121 candidate genes enriched in functions relevant to red blood cell biology. The candidate genes are expressed preferentially in red blood cell precursors, and 43 have haematopoietic phenotypes in Mus musculus or Drosophila melanogaster. Through open-chromatin and coding-variant analyses we identify potential causal genetic variants at 41 loci. Our findings provide extensive new insights into genetic mechanisms and biological pathways controlling red blood cell formation and function.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3623669/" 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/PMC3623669/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉van der Harst, Pim -- Zhang, Weihua -- Mateo Leach, Irene -- Rendon, Augusto -- Verweij, Niek -- Sehmi, Joban -- Paul, Dirk S -- Elling, Ulrich -- Allayee, Hooman -- Li, Xinzhong -- Radhakrishnan, Aparna -- Tan, Sian-Tsung -- Voss, Katrin -- Weichenberger, Christian X -- Albers, Cornelis A -- Al-Hussani, Abtehale -- Asselbergs, Folkert W -- Ciullo, Marina -- Danjou, Fabrice -- Dina, Christian -- Esko, Tonu -- Evans, David M -- Franke, Lude -- Gogele, Martin -- Hartiala, Jaana -- Hersch, Micha -- Holm, Hilma -- Hottenga, Jouke-Jan -- Kanoni, Stavroula -- Kleber, Marcus E -- Lagou, Vasiliki -- Langenberg, Claudia -- Lopez, Lorna M -- Lyytikainen, Leo-Pekka -- Melander, Olle -- Murgia, Federico -- Nolte, Ilja M -- O'Reilly, Paul F -- Padmanabhan, Sandosh -- Parsa, Afshin -- Pirastu, Nicola -- Porcu, Eleonora -- Portas, Laura -- Prokopenko, Inga -- Ried, Janina S -- Shin, So-Youn -- Tang, Clara S -- Teumer, Alexander -- Traglia, Michela -- Ulivi, Sheila -- Westra, Harm-Jan -- Yang, Jian -- Zhao, Jing Hua -- Anni, Franco -- Abdellaoui, Abdel -- Attwood, Antony -- Balkau, Beverley -- Bandinelli, Stefania -- Bastardot, Francois -- Benyamin, Beben -- Boehm, Bernhard O -- Cookson, William O -- Das, Debashish -- de Bakker, Paul I W -- de Boer, Rudolf A -- de Geus, Eco J C -- de Moor, Marleen H -- Dimitriou, Maria -- Domingues, Francisco S -- Doring, Angela -- Engstrom, Gunnar -- Eyjolfsson, Gudmundur Ingi -- Ferrucci, Luigi -- Fischer, Krista -- Galanello, Renzo -- Garner, Stephen F -- Genser, Bernd -- Gibson, Quince D -- Girotto, Giorgia -- Gudbjartsson, Daniel Fannar -- Harris, Sarah E -- Hartikainen, Anna-Liisa -- Hastie, Claire E -- Hedblad, Bo -- Illig, Thomas -- Jolley, Jennifer -- Kahonen, Mika -- Kema, Ido P -- Kemp, John P -- Liang, Liming -- Lloyd-Jones, Heather -- Loos, Ruth J F -- Meacham, Stuart -- Medland, Sarah E -- Meisinger, Christa -- Memari, Yasin -- Mihailov, Evelin -- Miller, Kathy -- Moffatt, Miriam F -- Nauck, Matthias -- Novatchkova, Maria -- Nutile, Teresa -- Olafsson, Isleifur -- Onundarson, Pall T -- Parracciani, Debora -- Penninx, Brenda W -- Perseu, Lucia -- Piga, Antonio -- Pistis, Giorgio -- Pouta, Anneli -- Puc, Ursula -- Raitakari, Olli -- Ring, Susan M -- Robino, Antonietta -- Ruggiero, Daniela -- Ruokonen, Aimo -- Saint-Pierre, Aude -- Sala, Cinzia -- Salumets, Andres -- Sambrook, Jennifer -- Schepers, Hein -- Schmidt, Carsten Oliver -- Sillje, Herman H W -- Sladek, Rob -- Smit, Johannes H -- Starr, John M -- Stephens, Jonathan -- Sulem, Patrick -- Tanaka, Toshiko -- Thorsteinsdottir, Unnur -- Tragante, Vinicius -- van Gilst, Wiek H -- van Pelt, L Joost -- van Veldhuisen, Dirk J -- Volker, Uwe -- Whitfield, John B -- Willemsen, Gonneke -- Winkelmann, Bernhard R -- Wirnsberger, Gerald -- Algra, Ale -- Cucca, Francesco -- d'Adamo, Adamo Pio -- Danesh, John -- Deary, Ian J -- Dominiczak, Anna F -- Elliott, Paul -- Fortina, Paolo -- Froguel, Philippe -- Gasparini, Paolo -- Greinacher, Andreas -- Hazen, Stanley L -- Jarvelin, Marjo-Riitta -- Khaw, Kay Tee -- Lehtimaki, Terho -- Maerz, Winfried -- Martin, Nicholas G -- Metspalu, Andres -- Mitchell, Braxton D -- Montgomery, Grant W -- Moore, Carmel -- Navis, Gerjan -- Pirastu, Mario -- Pramstaller, Peter P -- Ramirez-Solis, Ramiro -- Schadt, Eric -- Scott, James -- Shuldiner, Alan R -- Smith, George Davey -- Smith, J Gustav -- Snieder, Harold -- Sorice, Rossella -- Spector, Tim D -- Stefansson, Kari -- Stumvoll, Michael -- Tang, W H Wilson -- Toniolo, Daniela -- Tonjes, Anke -- Visscher, Peter M -- Vollenweider, Peter -- Wareham, Nicholas J -- Wolffenbuttel, Bruce H R -- Boomsma, Dorret I -- Beckmann, Jacques S -- Dedoussis, George V -- Deloukas, Panos -- Ferreira, Manuel A -- Sanna, Serena -- Uda, Manuela -- Hicks, Andrew A -- Penninger, Josef Martin -- Gieger, Christian -- Kooner, Jaspal S -- Ouwehand, Willem H -- Soranzo, Nicole -- Chambers, John C -- 092731/Wellcome Trust/United Kingdom -- 097117/Wellcome Trust/United Kingdom -- 14136/Cancer Research UK/United Kingdom -- CZB/4/505/Chief Scientist Office/United Kingdom -- ETM/55/Chief Scientist Office/United Kingdom -- G0600705/Medical Research Council/United Kingdom -- G0700704/Medical Research Council/United Kingdom -- G0801056/Medical Research Council/United Kingdom -- G1000143/Medical Research Council/United Kingdom -- G1002084/Medical Research Council/United Kingdom -- G9815508/Medical Research Council/United Kingdom -- HHSN268201100005C/HL/NHLBI NIH HHS/ -- HHSN268201100006C/HL/NHLBI NIH HHS/ -- HHSN268201100007C/HL/NHLBI NIH HHS/ -- HHSN268201100008C/HL/NHLBI NIH HHS/ -- HHSN268201100009C/HL/NHLBI NIH HHS/ -- HHSN268201100010C/HL/NHLBI NIH HHS/ -- HHSN268201100011C/HL/NHLBI NIH HHS/ -- HHSN268201100012C/HL/NHLBI NIH HHS/ -- HHSN271201100005C/DA/NIDA NIH HHS/ -- K12 RR023250/RR/NCRR NIH HHS/ -- MC_U106179471/Medical Research Council/United Kingdom -- MC_U106188470/Medical Research Council/United Kingdom -- N01AG12109/AG/NIA NIH HHS/ -- P01 HL076491/HL/NHLBI NIH HHS/ -- P01 HL098055/HL/NHLBI NIH HHS/ -- P20 HL113452/HL/NHLBI NIH HHS/ -- P30 DK072488/DK/NIDDK NIH HHS/ -- R01 AG018728/AG/NIA NIH HHS/ -- R01 CA165001/CA/NCI NIH HHS/ -- R01 GM053275/GM/NIGMS NIH HHS/ -- R01 HD042157/HD/NICHD NIH HHS/ -- R01 HL059367/HL/NHLBI NIH HHS/ -- R01 HL086694/HL/NHLBI NIH HHS/ -- R01 HL087641/HL/NHLBI NIH HHS/ -- R01 HL087679/HL/NHLBI NIH HHS/ -- R01 HL088119/HL/NHLBI NIH HHS/ -- R01 HL103866/HL/NHLBI NIH HHS/ -- R01 HL103931/HL/NHLBI NIH HHS/ -- R01 LM010098/LM/NLM NIH HHS/ -- R01 MH081802/MH/NIMH NIH HHS/ -- RG/09/012/28096/British Heart Foundation/United Kingdom -- RL1 MH083268/MH/NIMH NIH HHS/ -- U01 GM074518/GM/NIGMS NIH HHS/ -- U01 HG004402/HG/NHGRI NIH HHS/ -- U01 HL072515/HL/NHLBI NIH HHS/ -- U01 HL084756/HL/NHLBI NIH HHS/ -- U24 MH068457/MH/NIMH NIH HHS/ -- U54 RR020278/RR/NCRR NIH HHS/ -- UL1 RR025005/RR/NCRR NIH HHS/ -- UL1 TR000439/TR/NCATS NIH HHS/ -- England -- Nature. 2012 Dec 20;492(7429):369-75. doi: 10.1038/nature11677. Epub 2012 Dec 5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cardiology, University of Groningen, University Medical Center Groningen, 9700 RB Groningen, The Netherlands. p.van.der.harst@umcg.nl〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23222517" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Cycle/genetics ; Cytokines/metabolism ; Drosophila melanogaster/genetics ; Erythrocytes/cytology/*metabolism ; Female ; Gene Expression Regulation/genetics ; *Genetic Loci ; *Genome-Wide Association Study ; Hematopoiesis/genetics ; Hemoglobins/genetics ; Humans ; Male ; Mice ; Organ Specificity ; *Phenotype ; Polymorphism, Single Nucleotide/genetics ; RNA Interference ; Signal Transduction/genetics
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 3
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    An anatomically comprehensive atlas of the adult human brain transcriptome (2012)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2012-09-22
    Description: Neuroanatomically precise, genome-wide maps of transcript distributions are critical resources to complement genomic sequence data and to correlate functional and genetic brain architecture. Here we describe the generation and analysis of a transcriptional atlas of the adult human brain, comprising extensive histological analysis and comprehensive microarray profiling of approximately 900 neuroanatomically precise subdivisions in two individuals. Transcriptional regulation varies enormously by anatomical location, with different regions and their constituent cell types displaying robust molecular signatures that are highly conserved between individuals. Analysis of differential gene expression and gene co-expression relationships demonstrates that brain-wide variation strongly reflects the distributions of major cell classes such as neurons, oligodendrocytes, astrocytes and microglia. Local neighbourhood relationships between fine anatomical subdivisions are associated with discrete neuronal subtypes and genes involved with synaptic transmission. The neocortex displays a relatively homogeneous transcriptional pattern, but with distinct features associated selectively with primary sensorimotor cortices and with enriched frontal lobe expression. Notably, the spatial topography of the neocortex is strongly reflected in its molecular topography-the closer two cortical regions, the more similar their transcriptomes. This freely accessible online data resource forms a high-resolution transcriptional baseline for neurogenetic studies of normal and abnormal human brain function.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4243026/" 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/PMC4243026/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Hawrylycz, Michael J -- Lein, Ed S -- Guillozet-Bongaarts, Angela L -- Shen, Elaine H -- Ng, Lydia -- Miller, Jeremy A -- van de Lagemaat, Louie N -- Smith, Kimberly A -- Ebbert, Amanda -- Riley, Zackery L -- Abajian, Chris -- Beckmann, Christian F -- Bernard, Amy -- Bertagnolli, Darren -- Boe, Andrew F -- Cartagena, Preston M -- Chakravarty, M Mallar -- Chapin, Mike -- Chong, Jimmy -- Dalley, Rachel A -- Daly, Barry David -- Dang, Chinh -- Datta, Suvro -- Dee, Nick -- Dolbeare, Tim A -- Faber, Vance -- Feng, David -- Fowler, David R -- Goldy, Jeff -- Gregor, Benjamin W -- Haradon, Zeb -- Haynor, David R -- Hohmann, John G -- Horvath, Steve -- Howard, Robert E -- Jeromin, Andreas -- Jochim, Jayson M -- Kinnunen, Marty -- Lau, Christopher -- Lazarz, Evan T -- Lee, Changkyu -- Lemon, Tracy A -- Li, Ling -- Li, Yang -- Morris, John A -- Overly, Caroline C -- Parker, Patrick D -- Parry, Sheana E -- Reding, Melissa -- Royall, Joshua J -- Schulkin, Jay -- Sequeira, Pedro Adolfo -- Slaughterbeck, Clifford R -- Smith, Simon C -- Sodt, Andy J -- Sunkin, Susan M -- Swanson, Beryl E -- Vawter, Marquis P -- Williams, Derric -- Wohnoutka, Paul -- Zielke, H Ronald -- Geschwind, Daniel H -- Hof, Patrick R -- Smith, Stephen M -- Koch, Christof -- Grant, Seth G N -- Jones, Allan R -- 066717/Wellcome Trust/United Kingdom -- 077155/Wellcome Trust/United Kingdom -- 1C76HF15069-01-00/PHS HHS/ -- 1C76HF19619-01-00/PHS HHS/ -- G0700399/Medical Research Council/United Kingdom -- G0802238/Medical Research Council/United Kingdom -- Wellcome Trust/United Kingdom -- England -- Nature. 2012 Sep 20;489(7416):391-9. doi: 10.1038/nature11405.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Allen Institute for Brain Science, Seattle, Washington 98103, USA. mikeh@alleninstitute.org〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22996553" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; *Anatomy, Artistic ; Animals ; *Atlases as Topic ; Brain/*anatomy & histology/cytology/*metabolism ; Calbindins ; Databases, Genetic ; Dopamine/metabolism ; *Gene Expression Profiling ; Health ; Hippocampus/cytology/metabolism ; Humans ; In Situ Hybridization ; Internet ; Macaca mulatta/anatomy & histology/genetics ; Male ; Mice ; Neocortex/anatomy & histology/cytology/metabolism ; Oligonucleotide Array Sequence Analysis ; Post-Synaptic Density/genetics ; RNA, Messenger/analysis/genetics ; S100 Calcium Binding Protein G/genetics ; Species Specificity ; Transcriptome/*genetics
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 4
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    A murine lung cancer co-clinical trial identifies genetic modifiers of therapeutic response (2012)
    Nature Publishing Group (NPG)
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    Publication Date: 2012-03-20
    Description: Targeted therapies have demonstrated efficacy against specific subsets of molecularly defined cancers. Although most patients with lung cancer are stratified according to a single oncogenic driver, cancers harbouring identical activating genetic mutations show large variations in their responses to the same targeted therapy. The biology underlying this heterogeneity is not well understood, and the impact of co-existing genetic mutations, especially the loss of tumour suppressors, has not been fully explored. Here we use genetically engineered mouse models to conduct a 'co-clinical' trial that mirrors an ongoing human clinical trial in patients with KRAS-mutant lung cancers. This trial aims to determine if the MEK inhibitor selumetinib (AZD6244) increases the efficacy of docetaxel, a standard of care chemotherapy. Our studies demonstrate that concomitant loss of either p53 (also known as Tp53) or Lkb1 (also known as Stk11), two clinically relevant tumour suppressors, markedly impaired the response of Kras-mutant cancers to docetaxel monotherapy. We observed that the addition of selumetinib provided substantial benefit for mice with lung cancer caused by Kras and Kras and p53 mutations, but mice with Kras and Lkb1 mutations had primary resistance to this combination therapy. Pharmacodynamic studies, including positron-emission tomography (PET) and computed tomography (CT), identified biological markers in mice and patients that provide a rationale for the differential efficacy of these therapies in the different genotypes. These co-clinical results identify predictive genetic biomarkers that should be validated by interrogating samples from patients enrolled on the concurrent clinical trial. These studies also highlight the rationale for synchronous co-clinical trials, not only to anticipate the results of ongoing human clinical trials, but also to generate clinically relevant hypotheses that can inform the analysis and design of human studies.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3385933/" 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/PMC3385933/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Chen, Zhao -- Cheng, Katherine -- Walton, Zandra -- Wang, Yuchuan -- Ebi, Hiromichi -- Shimamura, Takeshi -- Liu, Yan -- Tupper, Tanya -- Ouyang, Jing -- Li, Jie -- Gao, Peng -- Woo, Michele S -- Xu, Chunxiao -- Yanagita, Masahiko -- Altabef, Abigail -- Wang, Shumei -- Lee, Charles -- Nakada, Yuji -- Pena, Christopher G -- Sun, Yanping -- Franchetti, Yoko -- Yao, Catherine -- Saur, Amy -- Cameron, Michael D -- Nishino, Mizuki -- Hayes, D Neil -- Wilkerson, Matthew D -- Roberts, Patrick J -- Lee, Carrie B -- Bardeesy, Nabeel -- Butaney, Mohit -- Chirieac, Lucian R -- Costa, Daniel B -- Jackman, David -- Sharpless, Norman E -- Castrillon, Diego H -- Demetri, George D -- Janne, Pasi A -- Pandolfi, Pier Paolo -- Cantley, Lewis C -- Kung, Andrew L -- Engelman, Jeffrey A -- Wong, Kwok-Kin -- 1U01CA141576/CA/NCI NIH HHS/ -- CA122794/CA/NCI NIH HHS/ -- CA137008/CA/NCI NIH HHS/ -- CA137008-01/CA/NCI NIH HHS/ -- CA137181/CA/NCI NIH HHS/ -- CA140594/CA/NCI NIH HHS/ -- CA147940/CA/NCI NIH HHS/ -- K23 CA157631/CA/NCI NIH HHS/ -- P01 CA120964/CA/NCI NIH HHS/ -- P30 CA016086/CA/NCI NIH HHS/ -- P50 CA090578/CA/NCI NIH HHS/ -- P50 CA090578-06/CA/NCI NIH HHS/ -- P50CA090578/CA/NCI NIH HHS/ -- R01 CA122794/CA/NCI NIH HHS/ -- R01 CA122794-01/CA/NCI NIH HHS/ -- R01 CA137008/CA/NCI NIH HHS/ -- R01 CA137008-01/CA/NCI NIH HHS/ -- R01 CA137181/CA/NCI NIH HHS/ -- R01 CA137181-01A2/CA/NCI NIH HHS/ -- R01 CA140594/CA/NCI NIH HHS/ -- R01 CA140594-01/CA/NCI NIH HHS/ -- R01 CA163896/CA/NCI NIH HHS/ -- RC2 CA147940/CA/NCI NIH HHS/ -- RC2 CA147940-01/CA/NCI NIH HHS/ -- U01 CA141576/CA/NCI NIH HHS/ -- U01 CA141576-01/CA/NCI NIH HHS/ -- England -- Nature. 2012 Mar 18;483(7391):613-7. doi: 10.1038/nature10937.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Harvard Medical School, Boston, Massachusetts 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22425996" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antineoplastic Combined Chemotherapy Protocols ; Benzimidazoles/*pharmacology/therapeutic use ; Biomarkers, Tumor/genetics/metabolism ; *Clinical Trials, Phase II as Topic ; *Disease Models, Animal ; Drug Evaluation, Preclinical ; Fluorodeoxyglucose F18 ; Genes, p53/genetics ; Humans ; Lung Neoplasms/*drug therapy/enzymology/*genetics/metabolism ; MAP Kinase Signaling System/drug effects ; Mice ; Mitogen-Activated Protein Kinase Kinases/antagonists & inhibitors ; Mutation/genetics ; Pharmacogenetics/*methods ; Positron-Emission Tomography ; Protein-Serine-Threonine Kinases/deficiency/genetics ; Proto-Oncogene Proteins/genetics/metabolism ; Proto-Oncogene Proteins p21(ras)/genetics/metabolism ; Randomized Controlled Trials as Topic ; Reproducibility of Results ; Taxoids/*therapeutic use ; Tomography, X-Ray Computed ; Treatment Outcome ; ras Proteins/genetics/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 5
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    Mutations in the profilin 1 gene cause familial amyotrophic lateral sclerosis (2012)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2012-07-18
    Description: Amyotrophic lateral sclerosis (ALS) is a late-onset neurodegenerative disorder resulting from motor neuron death. Approximately 10% of cases are familial (FALS), typically with a dominant inheritance mode. Despite numerous advances in recent years, nearly 50% of FALS cases have unknown genetic aetiology. Here we show that mutations within the profilin 1 (PFN1) gene can cause FALS. PFN1 is crucial for the conversion of monomeric (G)-actin to filamentous (F)-actin. Exome sequencing of two large ALS families showed different mutations within the PFN1 gene. Further sequence analysis identified 4 mutations in 7 out of 274 FALS cases. Cells expressing PFN1 mutants contain ubiquitinated, insoluble aggregates that in many cases contain the ALS-associated protein TDP-43. PFN1 mutants also display decreased bound actin levels and can inhibit axon outgrowth. Furthermore, primary motor neurons expressing mutant PFN1 display smaller growth cones with a reduced F/G-actin ratio. These observations further document that cytoskeletal pathway alterations contribute to ALS pathogenesis.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3575525/" 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/PMC3575525/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wu, Chi-Hong -- Fallini, Claudia -- Ticozzi, Nicola -- Keagle, Pamela J -- Sapp, Peter C -- Piotrowska, Katarzyna -- Lowe, Patrick -- Koppers, Max -- McKenna-Yasek, Diane -- Baron, Desiree M -- Kost, Jason E -- Gonzalez-Perez, Paloma -- Fox, Andrew D -- Adams, Jenni -- Taroni, Franco -- Tiloca, Cinzia -- Leclerc, Ashley Lyn -- Chafe, Shawn C -- Mangroo, Dev -- Moore, Melissa J -- Zitzewitz, Jill A -- Xu, Zuo-Shang -- van den Berg, Leonard H -- Glass, Jonathan D -- Siciliano, Gabriele -- Cirulli, Elizabeth T -- Goldstein, David B -- Salachas, Francois -- Meininger, Vincent -- Rossoll, Wilfried -- Ratti, Antonia -- Gellera, Cinzia -- Bosco, Daryl A -- Bassell, Gary J -- Silani, Vincenzo -- Drory, Vivian E -- Brown, Robert H Jr -- Landers, John E -- 1R01NS050557/NS/NINDS NIH HHS/ -- 1R01NS065847/NS/NINDS NIH HHS/ -- R01 NS050557/NS/NINDS NIH HHS/ -- RC2 NS070342/NS/NINDS NIH HHS/ -- RC2-NS070-342/NS/NINDS NIH HHS/ -- T32 GM007754/GM/NIGMS NIH HHS/ -- U01 NS052225/NS/NINDS NIH HHS/ -- UL1 TR000454/TR/NCATS NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2012 Aug 23;488(7412):499-503. doi: 10.1038/nature11280.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Neurology, University of Massachusetts Medical School, Worcester, Massachusetts 01605, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22801503" target="_blank"〉PubMed〈/a〉
    Keywords: Actins/metabolism ; Amino Acid Sequence ; Amyotrophic Lateral Sclerosis/diagnosis/*genetics/metabolism/*pathology ; Animals ; Axons/metabolism/pathology ; Cells, Cultured ; European Continental Ancestry Group/genetics ; Exome/genetics ; Female ; Genetic Predisposition to Disease/*genetics ; Growth Cones/metabolism ; High-Throughput Nucleotide Sequencing ; Humans ; Jews/genetics ; Male ; Mice ; Models, Molecular ; Molecular Sequence Data ; Motor Neurons/cytology/metabolism ; Mutant Proteins/genetics/*metabolism ; Mutation/*genetics ; Pedigree ; Profilins/*genetics/*metabolism ; Protein Conformation ; Ubiquitination
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Published by Nature Publishing Group (NPG)
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  • 6
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    Mitochondrial Atpif1 regulates haem synthesis in developing erythroblasts (2012)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2012-11-09
    Description: Defects in the availability of haem substrates or the catalytic activity of the terminal enzyme in haem biosynthesis, ferrochelatase (Fech), impair haem synthesis and thus cause human congenital anaemias. The interdependent functions of regulators of mitochondrial homeostasis and enzymes responsible for haem synthesis are largely unknown. To investigate this we used zebrafish genetic screens and cloned mitochondrial ATPase inhibitory factor 1 (atpif1) from a zebrafish mutant with profound anaemia, pinotage (pnt (tq209)). Here we describe a direct mechanism establishing that Atpif1 regulates the catalytic efficiency of vertebrate Fech to synthesize haem. The loss of Atpif1 impairs haemoglobin synthesis in zebrafish, mouse and human haematopoietic models as a consequence of diminished Fech activity and elevated mitochondrial pH. To understand the relationship between mitochondrial pH, redox potential, [2Fe-2S] clusters and Fech activity, we used genetic complementation studies of Fech constructs with or without [2Fe-2S] clusters in pnt, as well as pharmacological agents modulating mitochondrial pH and redox potential. The presence of [2Fe-2S] cluster renders vertebrate Fech vulnerable to perturbations in Atpif1-regulated mitochondrial pH and redox potential. Therefore, Atpif1 deficiency reduces the efficiency of vertebrate Fech to synthesize haem, resulting in anaemia. The identification of mitochondrial Atpif1 as a regulator of haem synthesis advances our understanding of the mechanisms regulating mitochondrial haem homeostasis and red blood cell development. An ATPIF1 deficiency may contribute to important human diseases, such as congenital sideroblastic anaemias and mitochondriopathies.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3504625/" 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/PMC3504625/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Shah, Dhvanit I -- Takahashi-Makise, Naoko -- Cooney, Jeffrey D -- Li, Liangtao -- Schultz, Iman J -- Pierce, Eric L -- Narla, Anupama -- Seguin, Alexandra -- Hattangadi, Shilpa M -- Medlock, Amy E -- Langer, Nathaniel B -- Dailey, Tamara A -- Hurst, Slater N -- Faccenda, Danilo -- Wiwczar, Jessica M -- Heggers, Spencer K -- Vogin, Guillaume -- Chen, Wen -- Chen, Caiyong -- Campagna, Dean R -- Brugnara, Carlo -- Zhou, Yi -- Ebert, Benjamin L -- Danial, Nika N -- Fleming, Mark D -- Ward, Diane M -- Campanella, Michelangelo -- Dailey, Harry A -- Kaplan, Jerry -- Paw, Barry H -- K01 DK085217/DK/NIDDK NIH HHS/ -- P01 HL032262/HL/NHLBI NIH HHS/ -- P30 DK072437/DK/NIDDK NIH HHS/ -- R01 DK052380/DK/NIDDK NIH HHS/ -- R01 DK070838/DK/NIDDK NIH HHS/ -- R01 DK096051/DK/NIDDK NIH HHS/ -- R01 HL082945/HL/NHLBI NIH HHS/ -- T32 GM007223/GM/NIGMS NIH HHS/ -- England -- Nature. 2012 Nov 22;491(7425):608-12. doi: 10.1038/nature11536. Epub 2012 Nov 7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, Division of Hematology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23135403" target="_blank"〉PubMed〈/a〉
    Keywords: Anemia, Sideroblastic/genetics/metabolism/pathology ; Animals ; Disease Models, Animal ; Erythroblasts/cytology/*metabolism ; *Erythropoiesis ; Ferrochelatase/metabolism ; Genetic Complementation Test ; Heme/*biosynthesis ; Humans ; Hydrogen-Ion Concentration ; Mice ; Mitochondria/*metabolism/pathology ; Mitochondrial Proteins/deficiency/genetics/*metabolism ; Oxidation-Reduction ; Proteins/genetics/*metabolism ; Zebrafish/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 7
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    The deubiquitinase USP9X suppresses pancreatic ductal adenocarcinoma (2012)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2012-06-16
    Description: Pancreatic ductal adenocarcinoma (PDA) remains a lethal malignancy despite much progress concerning its molecular characterization. PDA tumours harbour four signature somatic mutations in addition to numerous lower frequency genetic events of uncertain significance. Here we use Sleeping Beauty (SB) transposon-mediated insertional mutagenesis in a mouse model of pancreatic ductal preneoplasia to identify genes that cooperate with oncogenic Kras(G12D) to accelerate tumorigenesis and promote progression. Our screen revealed new candidate genes for PDA and confirmed the importance of many genes and pathways previously implicated in human PDA. The most commonly mutated gene was the X-linked deubiquitinase Usp9x, which was inactivated in over 50% of the tumours. Although previous work had attributed a pro-survival role to USP9X in human neoplasia, we found instead that loss of Usp9x enhances transformation and protects pancreatic cancer cells from anoikis. Clinically, low USP9X protein and messenger RNA expression in PDA correlates with poor survival after surgery, and USP9X levels are inversely associated with metastatic burden in advanced disease. Furthermore, chromatin modulation with trichostatin A or 5-aza-2'-deoxycytidine elevates USP9X expression in human PDA cell lines, indicating a clinical approach for certain patients. The conditional deletion of Usp9x cooperated with Kras(G12D) to accelerate pancreatic tumorigenesis in mice, validating their genetic interaction. We propose that USP9X is a major tumour suppressor gene with prognostic and therapeutic relevance in PDA.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3376394/" 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/PMC3376394/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Perez-Mancera, Pedro A -- Rust, Alistair G -- van der Weyden, Louise -- Kristiansen, Glen -- Li, Allen -- Sarver, Aaron L -- Silverstein, Kevin A T -- Grutzmann, Robert -- Aust, Daniela -- Rummele, Petra -- Knosel, Thomas -- Herd, Colin -- Stemple, Derek L -- Kettleborough, Ross -- Brosnan, Jacqueline A -- Li, Ang -- Morgan, Richard -- Knight, Spencer -- Yu, Jun -- Stegeman, Shane -- Collier, Lara S -- ten Hoeve, Jelle J -- de Ridder, Jeroen -- Klein, Alison P -- Goggins, Michael -- Hruban, Ralph H -- Chang, David K -- Biankin, Andrew V -- Grimmond, Sean M -- Australian Pancreatic Cancer Genome Initiative -- Wessels, Lodewyk F A -- Wood, Stephen A -- Iacobuzio-Donahue, Christine A -- Pilarsky, Christian -- Largaespada, David A -- Adams, David J -- Tuveson, David A -- 13031/Cancer Research UK/United Kingdom -- 2P50CA101955/CA/NCI NIH HHS/ -- CA106610/CA/NCI NIH HHS/ -- CA122183/CA/NCI NIH HHS/ -- CA128920/CA/NCI NIH HHS/ -- CA62924/CA/NCI NIH HHS/ -- K01 CA122183/CA/NCI NIH HHS/ -- K01 CA122183-05/CA/NCI NIH HHS/ -- P50 CA101955/CA/NCI NIH HHS/ -- P50CA62924/CA/NCI NIH HHS/ -- Cancer Research UK/United Kingdom -- Wellcome Trust/United Kingdom -- England -- Nature. 2012 Apr 29;486(7402):266-70. doi: 10.1038/nature11114.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Li Ka Shing Centre, Cambridge Research Institute, Cancer Research UK, Cambridge CB2 0RE, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22699621" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Anoikis/genetics ; Carcinoma, Pancreatic Ductal/*enzymology/genetics/pathology ; Cell Line, Tumor ; Disease Models, Animal ; Endopeptidases ; Gene Expression Regulation, Neoplastic ; Gene Knockdown Techniques ; Humans ; Mice ; Mice, Inbred C57BL ; Pancreatic Neoplasms/*enzymology/genetics/pathology ; U937 Cells ; Ubiquitin Thiolesterase/*genetics/*metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 8
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    Rapamycin-induced insulin resistance is mediated by mTORC2 loss and uncoupled from longevity (2012)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2012-03-31
    Description: Rapamycin, an inhibitor of mechanistic target of rapamycin complex 1 (mTORC1), extends the life spans of yeast, flies, and mice. Calorie restriction, which increases life span and insulin sensitivity, is proposed to function by inhibition of mTORC1, yet paradoxically, chronic administration of rapamycin substantially impairs glucose tolerance and insulin action. We demonstrate that rapamycin disrupted a second mTOR complex, mTORC2, in vivo and that mTORC2 was required for the insulin-mediated suppression of hepatic gluconeogenesis. Further, decreased mTORC1 signaling was sufficient to extend life span independently from changes in glucose homeostasis, as female mice heterozygous for both mTOR and mLST8 exhibited decreased mTORC1 activity and extended life span but had normal glucose tolerance and insulin sensitivity. Thus, mTORC2 disruption is an important mediator of the effects of rapamycin in vivo.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3324089/" 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/PMC3324089/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Lamming, Dudley W -- Ye, Lan -- Katajisto, Pekka -- Goncalves, Marcus D -- Saitoh, Maki -- Stevens, Deanna M -- Davis, James G -- Salmon, Adam B -- Richardson, Arlan -- Ahima, Rexford S -- Guertin, David A -- Sabatini, David M -- Baur, Joseph A -- 1F32AG032833-01A1/AG/NIA NIH HHS/ -- CA129105/CA/NCI NIH HHS/ -- F32 AG032833/AG/NIA NIH HHS/ -- P30DK19525/DK/NIDDK NIH HHS/ -- R01 CA129105/CA/NCI NIH HHS/ -- R01 CA129105-05/CA/NCI NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2012 Mar 30;335(6076):1638-43. doi: 10.1126/science.1215135.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Whitehead Institute for Biomedical Research, Cambridge, MA 02142, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22461615" target="_blank"〉PubMed〈/a〉
    Keywords: Adipose Tissue, White/metabolism ; Animals ; Carrier Proteins/genetics/metabolism ; Female ; Gluconeogenesis ; Glucose/metabolism ; Glucose Clamp Technique ; Homeostasis ; Insulin/administration & dosage/blood ; *Insulin Resistance ; Liver/metabolism ; *Longevity ; Male ; Mice ; Mice, Inbred C57BL ; Multiprotein Complexes ; Muscle, Skeletal/metabolism ; Phosphorylation ; Proteins/antagonists & inhibitors/metabolism ; Proto-Oncogene Proteins c-akt/metabolism ; Signal Transduction ; Sirolimus/*pharmacology ; TOR Serine-Threonine Kinases/genetics/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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  • 9
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    Shear-activated nanotherapeutics for drug targeting to obstructed blood vessels (2012)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2012-07-07
    Description: Obstruction of critical blood vessels due to thrombosis or embolism is a leading cause of death worldwide. Here, we describe a biomimetic strategy that uses high shear stress caused by vascular narrowing as a targeting mechanism--in the same way platelets do--to deliver drugs to obstructed blood vessels. Microscale aggregates of nanoparticles were fabricated to break up into nanoscale components when exposed to abnormally high fluid shear stress. When coated with tissue plasminogen activator and administered intravenously in mice, these shear-activated nanotherapeutics induce rapid clot dissolution in a mesenteric injury model, restore normal flow dynamics, and increase survival in an otherwise fatal mouse pulmonary embolism model. This biophysical strategy for drug targeting, which lowers required doses and minimizes side effects while maximizing drug efficacy, offers a potential new approach for treatment of life-threatening diseases that result from acute vascular occlusion.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Korin, Netanel -- Kanapathipillai, Mathumai -- Matthews, Benjamin D -- Crescente, Marilena -- Brill, Alexander -- Mammoto, Tadanori -- Ghosh, Kaustabh -- Jurek, Samuel -- Bencherif, Sidi A -- Bhatta, Deen -- Coskun, Ahmet U -- Feldman, Charles L -- Wagner, Denisa D -- Ingber, Donald E -- New York, N.Y. -- Science. 2012 Aug 10;337(6095):738-42. doi: 10.1126/science.1217815. Epub 2012 Jul 5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Wyss Institute for Biologically Inspired Engineering, Harvard University, Boston, MA 02115, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22767894" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Biomimetic Materials ; Blood Circulation ; Drug Delivery Systems/*methods ; Fibrinolytic Agents/*administration & dosage ; Hemodynamics ; Hemorheology ; Lactic Acid ; Male ; Mesenteric Arteries ; Mesenteric Vascular Occlusion/*drug therapy ; Mice ; Mice, Inbred C57BL ; Microfluidic Analytical Techniques ; Models, Anatomic ; *Nanoparticles ; Polyglycolic Acid ; Pulmonary Embolism/*drug therapy ; Stress, Mechanical ; Thrombosis/*drug therapy/prevention & control ; Tissue Plasminogen Activator/*administration & dosage
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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    Clonal selection drives genetic divergence of metastatic medulloblastoma (2012)
    Nature Publishing Group (NPG)
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    Publication Date: 2012-02-22
    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〉
    Keywords: Animals ; Clonal Evolution/*genetics ; CpG Islands/genetics ; DNA Methylation ; DNA Transposable Elements/genetics ; Disease Models, Animal ; Genes, p53/genetics ; Germ-Line Mutation/genetics ; Humans ; Li-Fraumeni Syndrome/complications/genetics ; Medulloblastoma/complications/*genetics/*pathology ; Mice ; Mutagenesis, Insertional ; Neoplasm Metastasis/*genetics/*pathology ; Survival Rate
    Print ISSN: 0028-0836
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    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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