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  • 1
    Publication Date: 2014-03-22
    Description: Questions How do rodents with cyclic population dynamics affect seedling recruitment in alpine habitats? Does disturbance from rodents have larger implications on seedling recruitment in some plant communities than in others? Location Snowbeds and sheltered heaths in the low-alpine zone in areas of Børgefjell and Dovrefjell, Norway. Methods We recorded seedling emergence, rodent activity and cover of mosses, lichens, litter and bare ground in 270 plots in snowbeds and sheltered heaths in a rodent population peak year and in the following low-density year. Results Seedling recruitment was positively correlated with disturbances from lemmings and voles in both years. More seedlings emerged in the low-density year than in the year of the population peak. Snowbeds had higher seedling recruitment than the sheltered heaths, but both habitats were equally affected by disturbances from rodents. Conclusions Rodent activity created gaps and increased seedling emergence in these alpine plant communities, particularly in the year after the rodent peak, both in snowbeds and sheltered heath habitats. Our study therefore suggests that regeneration patterns in alpine vegetation are tightly linked to the population cycles of lemmings and voles, which peak in density at 3- to 5-yr intervals. Using 2 yr of observational data of rodent disturbances and seedling recruitment in alpine vegetation in Norway, we demonstrate that small rodent population dynamics are an important driver of seedling recruitment patterns in two alpine plant communities; snowbeds and sheltered heaths.
    Print ISSN: 1100-9233
    Electronic ISSN: 1654-1103
    Topics: Biology
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  • 2
    Publication Date: 2012-01-13
    Description: Early T-cell precursor acute lymphoblastic leukaemia (ETP ALL) is an aggressive malignancy of unknown genetic basis. We performed whole-genome sequencing of 12 ETP ALL cases and assessed the frequency of the identified somatic mutations in 94 T-cell acute lymphoblastic leukaemia cases. ETP ALL was characterized by activating mutations in genes regulating cytokine receptor and RAS signalling (67% of cases; NRAS, KRAS, FLT3, IL7R, JAK3, JAK1, SH2B3 and BRAF), inactivating lesions disrupting haematopoietic development (58%; GATA3, ETV6, RUNX1, IKZF1 and EP300) and histone-modifying genes (48%; EZH2, EED, SUZ12, SETD2 and EP300). We also identified new targets of recurrent mutation including DNM2, ECT2L and RELN. The mutational spectrum is similar to myeloid tumours, and moreover, the global transcriptional profile of ETP ALL was similar to that of normal and myeloid leukaemia haematopoietic stem cells. These findings suggest that addition of myeloid-directed therapies might improve the poor outcome of ETP ALL.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3267575/" 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/PMC3267575/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhang, Jinghui -- Ding, Li -- Holmfeldt, Linda -- Wu, Gang -- Heatley, Sue L -- Payne-Turner, Debbie -- Easton, John -- Chen, Xiang -- Wang, Jianmin -- Rusch, Michael -- Lu, Charles -- Chen, Shann-Ching -- Wei, Lei -- Collins-Underwood, J Racquel -- Ma, Jing -- Roberts, Kathryn G -- Pounds, Stanley B -- Ulyanov, Anatoly -- Becksfort, Jared -- Gupta, Pankaj -- Huether, Robert -- Kriwacki, Richard W -- Parker, Matthew -- McGoldrick, Daniel J -- Zhao, David -- Alford, Daniel -- Espy, Stephen -- Bobba, Kiran Chand -- Song, Guangchun -- Pei, Deqing -- Cheng, Cheng -- Roberts, Stefan -- Barbato, Michael I -- Campana, Dario -- Coustan-Smith, Elaine -- Shurtleff, Sheila A -- Raimondi, Susana C -- Kleppe, Maria -- Cools, Jan -- Shimano, Kristin A -- Hermiston, Michelle L -- Doulatov, Sergei -- Eppert, Kolja -- Laurenti, Elisa -- Notta, Faiyaz -- Dick, John E -- Basso, Giuseppe -- Hunger, Stephen P -- Loh, Mignon L -- Devidas, Meenakshi -- Wood, Brent -- Winter, Stuart -- Dunsmore, Kimberley P -- Fulton, Robert S -- Fulton, Lucinda L -- Hong, Xin -- Harris, Christopher C -- Dooling, David J -- Ochoa, Kerri -- Johnson, Kimberly J -- Obenauer, John C -- Evans, William E -- Pui, Ching-Hon -- Naeve, Clayton W -- Ley, Timothy J -- Mardis, Elaine R -- Wilson, Richard K -- Downing, James R -- Mullighan, Charles G -- CA114766/CA/NCI NIH HHS/ -- CA98413/CA/NCI NIH HHS/ -- CA98543/CA/NCI NIH HHS/ -- P30 CA021765/CA/NCI NIH HHS/ -- P30 CA021765-33/CA/NCI NIH HHS/ -- P30CA021765/CA/NCI NIH HHS/ -- U01GM92666/GM/NIGMS NIH HHS/ -- U54 HG003079/HG/NHGRI NIH HHS/ -- England -- Nature. 2012 Jan 11;481(7380):157-63. doi: 10.1038/nature10725.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Computational Biology and Bioinformatics, St Jude Children's Research Hospital, Memphis, Tennessee 38105, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22237106" target="_blank"〉PubMed〈/a〉
    Keywords: Age of Onset ; Child ; DNA Copy Number Variations/genetics ; Genes, ras/genetics ; Genetic Predisposition to Disease/*genetics ; Genome, Human/genetics ; Genomics ; Hematopoiesis/genetics ; Histones/metabolism ; Humans ; Janus Kinases/genetics/metabolism ; Leukemia, Myeloid, Acute/drug therapy/genetics/pathology ; Molecular Sequence Data ; Mutation/*genetics ; Precursor T-Cell Lymphoblastic Leukemia-Lymphoma/drug therapy/*genetics/pathology ; Receptors, Interleukin-7/genetics ; Sequence Analysis, DNA ; Signal Transduction/genetics ; Stem Cells/metabolism/pathology ; T-Lymphocytes/metabolism/pathology ; Translocation, Genetic/genetics
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 3
    Publication Date: 2012-01-13
    Description: Retinoblastoma is an aggressive childhood cancer of the developing retina that is initiated by the biallelic loss of RB1. Tumours progress very quickly following RB1 inactivation but the underlying mechanism is not known. Here we show that the retinoblastoma genome is stable, but that multiple cancer pathways can be epigenetically deregulated. To identify the mutations that cooperate with RB1 loss, we performed whole-genome sequencing of retinoblastomas. The overall mutational rate was very low; RB1 was the only known cancer gene mutated. We then evaluated the role of RB1 in genome stability and considered non-genetic mechanisms of cancer pathway deregulation. For example, the proto-oncogene SYK is upregulated in retinoblastoma and is required for tumour cell survival. Targeting SYK with a small-molecule inhibitor induced retinoblastoma tumour cell death in vitro and in vivo. Thus, retinoblastomas may develop quickly as a result of the epigenetic deregulation of key cancer pathways as a direct or indirect result of RB1 loss.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3289956/" 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/PMC3289956/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Zhang, Jinghui -- Benavente, Claudia A -- McEvoy, Justina -- Flores-Otero, Jacqueline -- Ding, Li -- Chen, Xiang -- Ulyanov, Anatoly -- Wu, Gang -- Wilson, Matthew -- Wang, Jianmin -- Brennan, Rachel -- Rusch, Michael -- Manning, Amity L -- Ma, Jing -- Easton, John -- Shurtleff, Sheila -- Mullighan, Charles -- Pounds, Stanley -- Mukatira, Suraj -- Gupta, Pankaj -- Neale, Geoff -- Zhao, David -- Lu, Charles -- Fulton, Robert S -- Fulton, Lucinda L -- Hong, Xin -- Dooling, David J -- Ochoa, Kerri -- Naeve, Clayton -- Dyson, Nicholas J -- Mardis, Elaine R -- Bahrami, Armita -- Ellison, David -- Wilson, Richard K -- Downing, James R -- Dyer, Michael A -- CA21765/CA/NCI NIH HHS/ -- CA64402/CA/NCI NIH HHS/ -- EY014867/EY/NEI NIH HHS/ -- EY018599/EY/NEI NIH HHS/ -- GM81607/GM/NIGMS NIH HHS/ -- R01 CA155202/CA/NCI NIH HHS/ -- R01 EY014867/EY/NEI NIH HHS/ -- R01 EY014867-02/EY/NEI NIH HHS/ -- R01 EY018599/EY/NEI NIH HHS/ -- R01 EY018599-03/EY/NEI NIH HHS/ -- Howard Hughes Medical Institute/ -- England -- Nature. 2012 Jan 11;481(7381):329-34. doi: 10.1038/nature10733.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Computational Biology and Bioinformatics, St Jude Children's Research Hospital, Memphis, Tennessee 38105, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22237022" target="_blank"〉PubMed〈/a〉
    Keywords: Aneuploidy ; Animals ; Cell Death/drug effects ; Cell Line ; Cell Survival/drug effects ; Chromosomal Instability/genetics ; Epigenesis, Genetic/*genetics ; Gene Expression Regulation, Neoplastic ; Genes, Retinoblastoma/genetics ; *Genomics ; Humans ; Intracellular Signaling Peptides and Proteins/antagonists & ; inhibitors/genetics/metabolism ; Mice ; *Molecular Targeted Therapy ; Mutation/genetics ; Protein Kinase Inhibitors/*pharmacology/therapeutic use ; Protein-Tyrosine Kinases/antagonists & inhibitors/genetics/metabolism ; Retinoblastoma/*drug therapy/*genetics/pathology ; Retinoblastoma Protein/deficiency/genetics ; Sequence Analysis, DNA ; Xenograft Model Antitumor Assays
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 4
    Publication Date: 2012-06-23
    Description: Medulloblastoma is a malignant childhood brain tumour comprising four discrete subgroups. Here, to identify mutations that drive medulloblastoma, we sequenced the entire genomes of 37 tumours and matched normal blood. One-hundred and thirty-six genes harbouring somatic mutations in this discovery set were sequenced in an additional 56 medulloblastomas. Recurrent mutations were detected in 41 genes not yet implicated in medulloblastoma; several target distinct components of the epigenetic machinery in different disease subgroups, such as regulators of H3K27 and H3K4 trimethylation in subgroups 3 and 4 (for example, KDM6A and ZMYM3), and CTNNB1-associated chromatin re-modellers in WNT-subgroup tumours (for example, SMARCA4 and CREBBP). Modelling of mutations in mouse lower rhombic lip progenitors that generate WNT-subgroup tumours identified genes that maintain this cell lineage (DDX3X), as well as mutated genes that initiate (CDH1) or cooperate (PIK3CA) in tumorigenesis. These data provide important new insights into the pathogenesis of medulloblastoma subgroups and highlight targets for therapeutic development.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3412905/" 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/PMC3412905/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Robinson, Giles -- Parker, Matthew -- Kranenburg, Tanya A -- Lu, Charles -- Chen, Xiang -- Ding, Li -- Phoenix, Timothy N -- Hedlund, Erin -- Wei, Lei -- Zhu, Xiaoyan -- Chalhoub, Nader -- Baker, Suzanne J -- Huether, Robert -- Kriwacki, Richard -- Curley, Natasha -- Thiruvenkatam, Radhika -- Wang, Jianmin -- Wu, Gang -- Rusch, Michael -- Hong, Xin -- Becksfort, Jared -- Gupta, Pankaj -- Ma, Jing -- Easton, John -- Vadodaria, Bhavin -- Onar-Thomas, Arzu -- Lin, Tong -- Li, Shaoyi -- Pounds, Stanley -- Paugh, Steven -- Zhao, David -- Kawauchi, Daisuke -- Roussel, Martine F -- Finkelstein, David -- Ellison, David W -- Lau, Ching C -- Bouffet, Eric -- Hassall, Tim -- Gururangan, Sridharan -- Cohn, Richard -- Fulton, Robert S -- Fulton, Lucinda L -- Dooling, David J -- Ochoa, Kerri -- Gajjar, Amar -- Mardis, Elaine R -- Wilson, Richard K -- Downing, James R -- Zhang, Jinghui -- Gilbertson, Richard J -- P01 CA096832/CA/NCI NIH HHS/ -- P01CA96832/CA/NCI NIH HHS/ -- P30 CA021765/CA/NCI NIH HHS/ -- P30CA021765/CA/NCI NIH HHS/ -- R01 CA129541/CA/NCI NIH HHS/ -- R01CA129541/CA/NCI NIH HHS/ -- England -- Nature. 2012 Aug 2;488(7409):43-8. doi: 10.1038/nature11213.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉St Jude Children's Research Hospital, Washington University Pediatric Cancer Genome Project, Memphis, Tennessee 38105, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/22722829" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; CREB-Binding Protein/genetics ; Cadherins/genetics ; Cdh1 Proteins ; Cell Cycle Proteins/deficiency/genetics ; Cell Lineage ; Cerebellar Neoplasms/*classification/*genetics/pathology ; Child ; DEAD-box RNA Helicases/genetics ; DNA Copy Number Variations ; DNA Helicases/genetics ; DNA Mutational Analysis ; Disease Models, Animal ; Genome, Human/genetics ; Genomics ; Hedgehog Proteins/metabolism ; Histone Demethylases/genetics ; Histones/metabolism ; Humans ; Medulloblastoma/*classification/*genetics/pathology ; Methylation ; Mice ; Mutation/*genetics ; Nuclear Proteins/genetics ; Phosphatidylinositol 3-Kinases/genetics ; Transcription Factors/genetics ; Wnt Proteins/metabolism ; beta Catenin/genetics
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 5
    Publication Date: 2016-11-24
    Description: Aim To investigate changes in community level functional responses to rainfall seasonality in Neotropical grasslands through the analysis of community aggregated traits. Location Semi-natural grasslands in the Río Grande de Matagalpa watershed, Nicaragua. Methods We measured fourteen functional response traits which are indicators of plant resource-use strategies across 32 herbaceous and four woody species in eight permanent plots, including: leaf size, specific leaf area, leaf dry matter content, leaf lifespan, foliar concentrations of P, N, Ca, K, and Mg, plant height, lateral spread by clonal growth, root depth, start of flowering period and length of the period from flowering to seed shed. We calculated the community weighted means (CWM) with trait values weighted by species cover for five different paddocks eleven times (between 2 Jul 2007 and 26 May 2008), and grouped them into four periods according to rainfall seasonality; early rainy season, late rainy season, early dry season and late dry season. Results Community aggregated values of specific leaf area, leaf dry matter content, leaf lifespan, foliar concentrations of P, N, Ca, K and Mg, length of the period from flowering to seed shed, and to a lesser extent lateral spread by clonal growth responded to temporal variations in rainfall, and corresponded to a considerable extent to expectations based on plant resource-use strategies along resource supply gradients. Community aggregated values of specific leaf area and foliar nutrient concentration were higher in the rainy season than in the dry season, while we observed an opposite trend with leaf dry matter content and leaf lifespan. Conclusions Semi-natural grasslands of central Nicaragua experience shifts in plant trait dominance that correspond with changes in resource supply given by rainfall seasonality, indicating that the stabilizing function of net primary productivity found in earlier studies can in part be a consequence of temporal differentiation in functional responses. This article is protected by copyright. All rights reserved.
    Print ISSN: 1100-9233
    Electronic ISSN: 1654-1103
    Topics: Biology
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  • 6
    Publication Date: 2014-02-21
    Description: Members of the nuclear factor-kappaB (NF-kappaB) family of transcriptional regulators are central mediators of the cellular inflammatory response. Although constitutive NF-kappaB signalling is present in most human tumours, mutations in pathway members are rare, complicating efforts to understand and block aberrant NF-kappaB activity in cancer. Here we show that more than two-thirds of supratentorial ependymomas contain oncogenic fusions between RELA, the principal effector of canonical NF-kappaB signalling, and an uncharacterized gene, C11orf95. In each case, C11orf95-RELA fusions resulted from chromothripsis involving chromosome 11q13.1. C11orf95-RELA fusion proteins translocated spontaneously to the nucleus to activate NF-kappaB target genes, and rapidly transformed neural stem cells--the cell of origin of ependymoma--to form these tumours in mice. Our data identify a highly recurrent genetic alteration of RELA in human cancer, and the C11orf95-RELA fusion protein as a potential therapeutic target in supratentorial ependymoma.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4050669/" 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/PMC4050669/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Parker, Matthew -- Mohankumar, Kumarasamypet M -- Punchihewa, Chandanamali -- Weinlich, Ricardo -- Dalton, James D -- Li, Yongjin -- Lee, Ryan -- Tatevossian, Ruth G -- Phoenix, Timothy N -- Thiruvenkatam, Radhika -- White, Elsie -- Tang, Bo -- Orisme, Wilda -- Gupta, Kirti -- Rusch, Michael -- Chen, Xiang -- Li, Yuxin -- Nagahawhatte, Panduka -- Hedlund, Erin -- Finkelstein, David -- Wu, Gang -- Shurtleff, Sheila -- Easton, John -- Boggs, Kristy -- Yergeau, Donald -- Vadodaria, Bhavin -- Mulder, Heather L -- Becksfort, Jared -- Gupta, Pankaj -- Huether, Robert -- Ma, Jing -- Song, Guangchun -- Gajjar, Amar -- Merchant, Thomas -- Boop, Frederick -- Smith, Amy A -- Ding, Li -- Lu, Charles -- Ochoa, Kerri -- Zhao, David -- Fulton, Robert S -- Fulton, Lucinda L -- Mardis, Elaine R -- Wilson, Richard K -- Downing, James R -- Green, Douglas R -- Zhang, Jinghui -- Ellison, David W -- Gilbertson, Richard J -- P01 CA096832/CA/NCI NIH HHS/ -- P01CA96832/CA/NCI NIH HHS/ -- P30 CA021765/CA/NCI NIH HHS/ -- P30CA021765/CA/NCI NIH HHS/ -- R01 CA129541/CA/NCI NIH HHS/ -- R01CA129541/CA/NCI NIH HHS/ -- England -- Nature. 2014 Feb 27;506(7489):451-5. doi: 10.1038/nature13109. Epub 2014 Feb 19.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] St. Jude Children's Research Hospital - Washington University Pediatric Cancer Genome Project, Memphis, Tennessee 38105, USA [2] Department of Computational Biology and Bioinformatics, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA [3]. ; 1] Department of Developmental Neurobiology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA [2]. ; 1] Department of Pathology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA [2]. ; 1] Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA [2]. ; 1] St. Jude Children's Research Hospital - Washington University Pediatric Cancer Genome Project, Memphis, Tennessee 38105, USA [2] Department of Pathology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA. ; 1] St. Jude Children's Research Hospital - Washington University Pediatric Cancer Genome Project, Memphis, Tennessee 38105, USA [2] Department of Computational Biology and Bioinformatics, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA. ; Department of Pathology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA. ; Department of Developmental Neurobiology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA. ; Department of Computational Biology and Bioinformatics, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA. ; 1] Department of Computational Biology and Bioinformatics, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA [2] Structural Biology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA. ; St. Jude Children's Research Hospital - Washington University Pediatric Cancer Genome Project, Memphis, Tennessee 38105, USA. ; Structural Biology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA. ; 1] St. Jude Children's Research Hospital - Washington University Pediatric Cancer Genome Project, Memphis, Tennessee 38105, USA [2] Department of Oncology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA. ; Department of Radiological Sciences, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA. ; Department of Surgery, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA. ; MD Anderson Cancer Center Orlando, Pediatric Hematology/Oncology, 92 West Miller MP 318, Orlando, Florida 32806, USA. ; 1] St. Jude Children's Research Hospital - Washington University Pediatric Cancer Genome Project, Memphis, Tennessee 38105, USA [2] The Genome Institute, Washington University School of Medicine in St Louis, St Louis, Missouri 63108, USA [3] Department of Genetics, Washington University School of Medicine in St Louis, St Louis, Missouri 63108, USA. ; 1] St. Jude Children's Research Hospital - Washington University Pediatric Cancer Genome Project, Memphis, Tennessee 38105, USA [2] The Genome Institute, Washington University School of Medicine in St Louis, St Louis, Missouri 63108, USA. ; 1] St. Jude Children's Research Hospital - Washington University Pediatric Cancer Genome Project, Memphis, Tennessee 38105, USA [2] The Genome Institute, Washington University School of Medicine in St Louis, St Louis, Missouri 63108, USA [3] Department of Genetics, Washington University School of Medicine in St Louis, St Louis, Missouri 63108, USA [4] Siteman Cancer Center, Washington University School of Medicine in St Louis, St Louis, Missouri 63108, USA. ; Department of Immunology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA. ; 1] St. Jude Children's Research Hospital - Washington University Pediatric Cancer Genome Project, Memphis, Tennessee 38105, USA [2] Department of Developmental Neurobiology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24553141" target="_blank"〉PubMed〈/a〉
    Keywords: Adaptor Proteins, Signal Transducing/genetics/metabolism ; Animals ; Base Sequence ; Brain Neoplasms/genetics/metabolism/pathology ; Cell Line ; Cell Nucleus/metabolism ; *Cell Transformation, Neoplastic/genetics ; Chromosomes, Human, Pair 11/genetics ; Ependymoma/*genetics/*metabolism/pathology ; Female ; Humans ; Mice ; Models, Genetic ; Molecular Sequence Data ; NF-kappa B/genetics/*metabolism ; Neural Stem Cells/metabolism/pathology ; Oncogene Proteins, Fusion/genetics/metabolism ; Phosphoproteins/genetics/metabolism ; Proteins/genetics/*metabolism ; *Signal Transduction ; Transcription Factor RelA/genetics/*metabolism ; Translocation, Genetic/genetics
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 7
    Publication Date: 2016-09-21
    Description: Although most organisms thermoregulate behaviorally, biologists still cannot easily predict whether mobile animals will thermoregulate in natural environments. Current models fail because they ignore how the spatial distribution of thermal resources constrains thermoregulatory performance over space and time. To overcome this limitation, we modeled the spatially explicit movements of animals...
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
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  • 8
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 106 (1997), S. 2850-2864 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Exciton relaxation in poly(phenylenevinylene), PPV, has been probed by femtosecond luminescence-up-conversion. We report on excitonic luminescence profiles that depend on the spectral position of the detection window (ε(circumflex)=2.7,2.6,2.5, and 2.4 eV, respectively). In an attempt to reveal the transient steps implied in fs relaxation, we present a quantitative forward reconvolution fit procedure that is based on a microscopic incoherent transport model, including diagonal disorder, dipolar intersite coupling, and a density-of-states (DOS) of molecular site excitations. Special emphasis has been placed (i) on the analysis of luminescence lifetime distributions 〈φ(τ;ε(circumflex),τ0)〉 which directly map out the spectra of hopping modes of energy-cascading neutral excitations, and (ii) on the rigorous evaluation of (radiationless) transfer population from high-energy subensembles to low-energy tail states of the DOS. We quantitatively show that the absence of significant rise terms in the S0ν=0←S1ν=0 luminescence transition of low-lying tail states is due to the spectral superposition of the S0ν=1←S1ν=0 luminescence decay from states near the center of the DOS which, owing to the predominantly positive amplitudes of their ultrafast decay channels, destructively interfere with the negative amplitudes (luminescence rise terms) of migratively prepared bottom states. Finally, the asymptotic branch of the luminescence lifetime distribution 〈φ(τ;ε(circumflex)=2.4 eV,τ0)〉 has been reconstructed in an unbiased fashion by inverting the high-precision, picosecond, single-photon counting luminescence data at ε(circumflex)=2.4 eV with the help of a regularized exponential series methodology. The measurements combined by numerical computing are in accord with the molecular picture of exciton relaxation in PPV in which neutral, localized excitations undergo predominantly incoherent excitation energy transfer among sites of fluctuating self-energies related to segmental subunits with distributed π-bond conjugation lengths. © 1997 American Institute of Physics.
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  • 9
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
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  • 10
    Publication Date: 2012-01-30
    Print ISSN: 0027-8424
    Electronic ISSN: 1091-6490
    Topics: Biology , Medicine , Natural Sciences in General
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