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  • 1
    Publication Date: 2008-02-22
    Description: The innate immune system recognizes nucleic acids during infection and tissue damage. Whereas viral RNA is detected by endosomal toll-like receptors (TLR3, TLR7, TLR8) and cytoplasmic RIG-I and MDA5, endosomal TLR9 and cytoplasmic DAI bind DNA, resulting in the activation of nuclear factor-kappaB and interferon regulatory factor transcription factors. However, viruses also trigger pro-inflammatory responses, which remain poorly defined. Here we show that internalized adenoviral DNA induces maturation of pro-interleukin-1beta in macrophages, which is dependent on NALP3 and ASC, components of the innate cytosolic molecular complex termed the inflammasome. Correspondingly, NALP3- and ASC-deficient mice display reduced innate inflammatory responses to adenovirus particles. Inflammasome activation also occurs as a result of transfected cytosolic bacterial, viral and mammalian (host) DNA, but in this case sensing is dependent on ASC but not NALP3. The DNA-sensing pro-inflammatory pathway functions independently of TLRs and interferon regulatory factors. Thus, in addition to viral and bacterial components or danger signals in general, inflammasomes sense potentially dangerous cytoplasmic DNA, strengthening their central role in innate immunity.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Muruve, Daniel A -- Petrilli, Virginie -- Zaiss, Anne K -- White, Lindsay R -- Clark, Sharon A -- Ross, P Joel -- Parks, Robin J -- Tschopp, Jurg -- England -- Nature. 2008 Mar 6;452(7183):103-7. doi: 10.1038/nature06664. Epub 2008 Feb 20.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Medicine, University of Calgary, Alberta T2N 4N1, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18288107" target="_blank"〉PubMed〈/a〉
    Keywords: Adenoviridae/genetics/immunology/physiology ; Animals ; Apoptosis Regulatory Proteins ; Carrier Proteins/genetics/*immunology ; Cell Line ; Cytoskeletal Proteins/deficiency/genetics/*immunology ; Cytosol/*metabolism/microbiology/*virology ; DNA/*immunology ; DNA, Viral/immunology ; Humans ; Immunity, Innate/*immunology ; Inflammation/*immunology/virology ; Interleukin-1beta/immunology/metabolism/secretion ; Macrophages, Peritoneal/immunology/metabolism ; Mice ; Mice, Inbred C57BL ; Protein Processing, Post-Translational
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 2
    Publication Date: 2010-01-16
    Description: Artemisinin is a plant natural product produced by Artemisia annua and the active ingredient in the most effective treatment for malaria. Efforts to eradicate malaria are increasing demand for an affordable, high-quality, robust supply of artemisinin. We performed deep sequencing on the transcriptome of A. annua to identify genes and markers for fast-track breeding. Extensive genetic variation enabled us to build a detailed genetic map with nine linkage groups. Replicated field trials resulted in a quantitative trait loci (QTL) map that accounts for a significant amount of the variation in key traits controlling artemisinin yield. Enrichment for positive QTLs in parents of new high-yielding hybrids confirms that the knowledge and tools to convert A. annua into a robust crop are now available.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Graham, Ian A -- Besser, Katrin -- Blumer, Susan -- Branigan, Caroline A -- Czechowski, Tomasz -- Elias, Luisa -- Guterman, Inna -- Harvey, David -- Isaac, Peter G -- Khan, Awais M -- Larson, Tony R -- Li, Yi -- Pawson, Tanya -- Penfield, Teresa -- Rae, Anne M -- Rathbone, Deborah A -- Reid, Sonja -- Ross, Joe -- Smallwood, Margaret F -- Segura, Vincent -- Townsend, Theresa -- Vyas, Darshna -- Winzer, Thilo -- Bowles, Dianna -- New York, N.Y. -- Science. 2010 Jan 15;327(5963):328-31. doi: 10.1126/science.1182612.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Centre for Novel Agricultural Products, Department of Biology, University of York, York YO10 5YW, UK. iag1@york.ac.uk〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20075252" target="_blank"〉PubMed〈/a〉
    Keywords: Antimalarials/*metabolism ; Artemisia/*genetics/*metabolism ; Artemisinins/*metabolism ; *Chromosome Mapping ; Crosses, Genetic ; DNA, Complementary ; Gene Expression Profiling ; *Genes, Plant ; Genetic Association Studies ; Humans ; Malaria/drug therapy ; Mutation ; Phenotype ; Polymorphism, Single Nucleotide ; *Quantitative Trait Loci ; Sequence Analysis, DNA
    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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  • 3
    Publication Date: 2013-07-05
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McCouch, Susan -- Baute, Gregory J -- Bradeen, James -- Bramel, Paula -- Bretting, Peter K -- Buckler, Edward -- Burke, John M -- Charest, David -- Cloutier, Sylvie -- Cole, Glenn -- Dempewolf, Hannes -- Dingkuhn, Michael -- Feuillet, Catherine -- Gepts, Paul -- Grattapaglia, Dario -- Guarino, Luigi -- Jackson, Scott -- Knapp, Sandra -- Langridge, Peter -- Lawton-Rauh, Amy -- Lijua, Qui -- Lusty, Charlotte -- Michael, Todd -- Myles, Sean -- Naito, Ken -- Nelson, Randall L -- Pontarollo, Reno -- Richards, Christopher M -- Rieseberg, Loren -- Ross-Ibarra, Jeffrey -- Rounsley, Steve -- Hamilton, Ruaraidh Sackville -- Schurr, Ulrich -- Stein, Nils -- Tomooka, Norihiko -- van der Knaap, Esther -- van Tassel, David -- Toll, Jane -- Valls, Jose -- Varshney, Rajeev K -- Ward, Judson -- Waugh, Robbie -- Wenzl, Peter -- Zamir, Daniel -- England -- Nature. 2013 Jul 4;499(7456):23-4. doi: 10.1038/499023a.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Cornell University, Ithaca, New York, USA. mccouch@cornell.edu〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23823779" target="_blank"〉PubMed〈/a〉
    Keywords: Acclimatization/genetics ; Agriculture/economics/*methods/*trends ; Biodiversity ; Biological Specimen Banks ; Breeding ; Crops, Agricultural/genetics ; Food Supply/*statistics & numerical data ; Genes, Plant ; Humans ; Phenotype ; Seeds/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
    Publication Date: 2014-01-17
    Description: The discovery of millions of PIWI-interacting RNAs revealed a fascinating and unanticipated dimension of biology. The PIWI-piRNA pathway has been commonly perceived as germline-specific, even though the somatic function of PIWI proteins was documented when they were first discovered. Recent studies have begun to re-explore this pathway in somatic cells in diverse organisms, particularly lower eukaryotes. These studies have illustrated the multifaceted somatic functions of the pathway not only in transposon silencing but also in genome rearrangement and epigenetic programming, with biological roles in stem-cell function, whole-body regeneration, memory and possibly cancer.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4265809/" 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/PMC4265809/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ross, Robert J -- Weiner, Molly M -- Lin, Haifan -- DP1CA174418/CA/NCI NIH HHS/ -- R01 HD042012/HD/NICHD NIH HHS/ -- R01HD42012/HD/NICHD NIH HHS/ -- R37 HD042012/HD/NICHD NIH HHS/ -- T32 GM007205/GM/NIGMS NIH HHS/ -- T32-GM07205/GM/NIGMS NIH HHS/ -- England -- Nature. 2014 Jan 16;505(7483):353-9. doi: 10.1038/nature12987.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Yale Stem Cell Center and Department of Cell Biology, Yale University School of Medicine, New Haven, Connecticut 06509, USA. [2]. ; Yale Stem Cell Center and Department of Cell Biology, Yale University School of Medicine, New Haven, Connecticut 06509, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24429634" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Argonaute Proteins/*metabolism ; Ciliophora/genetics ; Drosophila Proteins/*metabolism ; Drosophila melanogaster/genetics/metabolism ; Epigenesis, Genetic/genetics ; Female ; Genome/genetics ; Humans ; Neoplasms/genetics ; Ovary/cytology/metabolism ; Phenotype ; RNA, Small Interfering/biosynthesis/*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
    Publication Date: 2013-06-07
    Description: Previous investigations of the core gene regulatory circuitry that controls the pluripotency of embryonic stem (ES) cells have largely focused on the roles of transcription, chromatin and non-coding RNA regulators. Alternative splicing represents a widely acting mode of gene regulation, yet its role in regulating ES-cell pluripotency and differentiation is poorly understood. Here we identify the muscleblind-like RNA binding proteins, MBNL1 and MBNL2, as conserved and direct negative regulators of a large program of cassette exon alternative splicing events that are differentially regulated between ES cells and other cell types. Knockdown of MBNL proteins in differentiated cells causes switching to an ES-cell-like alternative splicing pattern for approximately half of these events, whereas overexpression of MBNL proteins in ES cells promotes differentiated-cell-like alternative splicing patterns. Among the MBNL-regulated events is an ES-cell-specific alternative splicing switch in the forkhead family transcription factor FOXP1 that controls pluripotency. Consistent with a central and negative regulatory role for MBNL proteins in pluripotency, their knockdown significantly enhances the expression of key pluripotency genes and the formation of induced pluripotent stem cells during somatic cell reprogramming.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3933998/" 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/PMC3933998/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Han, Hong -- Irimia, Manuel -- Ross, P Joel -- Sung, Hoon-Ki -- Alipanahi, Babak -- David, Laurent -- Golipour, Azadeh -- Gabut, Mathieu -- Michael, Iacovos P -- Nachman, Emil N -- Wang, Eric -- Trcka, Dan -- Thompson, Tadeo -- O'Hanlon, Dave -- Slobodeniuc, Valentina -- Barbosa-Morais, Nuno L -- Burge, Christopher B -- Moffat, Jason -- Frey, Brendan J -- Nagy, Andras -- Ellis, James -- Wrana, Jeffrey L -- Blencowe, Benjamin J -- R01 HG002439/HG/NHGRI NIH HHS/ -- R33 MH087908/MH/NIMH NIH HHS/ -- R33MH087908/MH/NIMH NIH HHS/ -- Canadian Institutes of Health Research/Canada -- England -- Nature. 2013 Jun 13;498(7453):241-5. doi: 10.1038/nature12270. Epub 2013 Jun 5.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Banting and Best Department of Medical Research and Donnelly Centre, University of Toronto, Toronto, Ontario M5S 3E1, Canada.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23739326" target="_blank"〉PubMed〈/a〉
    Keywords: *Alternative Splicing/genetics ; Amino Acid Motifs ; Animals ; Cell Differentiation/genetics ; Cell Line ; *Cellular Reprogramming ; DNA-Binding Proteins/chemistry/deficiency/genetics/*metabolism ; Embryonic Stem Cells/*cytology/*metabolism ; Fibroblasts/cytology/metabolism ; Forkhead Transcription Factors/metabolism ; Gene Knockdown Techniques ; HEK293 Cells ; HeLa Cells ; Humans ; Induced Pluripotent Stem Cells/cytology/metabolism ; Kinetics ; Mice ; RNA-Binding Proteins/chemistry/genetics/*metabolism ; Repressor Proteins/metabolism
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 6
    Publication Date: 1995-03-24
    Description: A process has been developed for the in situ formation of the mineral phase of bone. Inorganic calcium and phosphate sources are combined to form a paste that is surgically implanted by injection. Under physiological conditions, the material hardens in minutes concurrent with the formation of dahllite. After 12 hours, dahllite formation was nearly complete, and an ultimate compressive strength of 55 megapascals was achieved. The composition and crystal morphology of the dahllite formed are similar to those of bone. Animal studies provide evidence that the material is remodeled in vivo. A novel approach to skeletal repair is being tested in human trials for various applications; in one of the trials the new biomaterial is being percutaneously placed into acute fractures. After hardening, it serves as internal fixation to maintain proper alignment while healing occurs.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Constantz, B R -- Ison, I C -- Fulmer, M T -- Poser, R D -- Smith, S T -- VanWagoner, M -- Ross, J -- Goldstein, S A -- Jupiter, J B -- Rosenthal, D I -- New York, N.Y. -- Science. 1995 Mar 24;267(5205):1796-9.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Norian Corporation, Cupertino, CA 95014.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7892603" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Apatites/*chemistry ; Bone Substitutes/*chemistry ; Calcium Carbonate/*chemistry ; Calcium Phosphates/*chemistry ; Crystallography, X-Ray ; Dogs ; Female ; Fractures, Bone/therapy ; Humans ; Microscopy, Electron ; Middle Aged ; Models, Chemical ; Osseointegration ; Rabbits ; Spectroscopy, Fourier Transform Infrared
    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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  • 7
    Publication Date: 2015-05-07
    Description: Pluripotency, the ability to generate any cell type of the body, is an evanescent attribute of embryonic cells. Transitory pluripotent cells can be captured at different time points during embryogenesis and maintained as embryonic stem cells or epiblast stem cells in culture. Since ontogenesis is a dynamic process in both space and time, it seems counterintuitive that these two temporal states represent the full spectrum of organismal pluripotency. Here we show that by modulating culture parameters, a stem-cell type with unique spatial characteristics and distinct molecular and functional features, designated as region-selective pluripotent stem cells (rsPSCs), can be efficiently obtained from mouse embryos and primate pluripotent stem cells, including humans. The ease of culturing and editing the genome of human rsPSCs offers advantages for regenerative medicine applications. The unique ability of human rsPSCs to generate post-implantation interspecies chimaeric embryos may facilitate our understanding of early human development and evolution.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Wu, Jun -- Okamura, Daiji -- Li, Mo -- Suzuki, Keiichiro -- Luo, Chongyuan -- Ma, Li -- He, Yupeng -- Li, Zhongwei -- Benner, Chris -- Tamura, Isao -- Krause, Marie N -- Nery, Joseph R -- Du, Tingting -- Zhang, Zhuzhu -- Hishida, Tomoaki -- Takahashi, Yuta -- Aizawa, Emi -- Kim, Na Young -- Lajara, Jeronimo -- Guillen, Pedro -- Campistol, Josep M -- Esteban, Concepcion Rodriguez -- Ross, Pablo J -- Saghatelian, Alan -- Ren, Bing -- Ecker, Joseph R -- Izpisua Belmonte, Juan Carlos -- Howard Hughes Medical Institute/ -- England -- Nature. 2015 May 21;521(7552):316-21. doi: 10.1038/nature14413. Epub 2015 May 6.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉The Salk Institute for Biological Studies, Gene Expression Laboratory, La Jolla, California 92037, USA. ; 1] Howard Hughes Medical Institute, The Salk Institute for Biological Studies, La Jolla, California 92037, USA [2] The Salk Institute for Biological Studies, Genomic Analysis Laboratory, La Jolla, California 92037, USA. ; The Salk Institute for Biological Studies, Genomic Analysis Laboratory, La Jolla, California 92037, USA. ; The Salk Institute for Biological Studies, Integrated Genomics, La Jolla, California 92037, USA. ; Ludwig Institute for Cancer Research, University of California, San Diego School of Medicine, Department of Cellular and Molecular Medicine, 9500 Gilman Drive, La Jolla, California 92093-0653, USA. ; 1] The Salk Institute for Biological Studies, Gene Expression Laboratory, La Jolla, California 92037, USA [2] Life Science Center, Tsukuba Advanced Research Alliance, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki 305-8577, Japan. ; Grado en Medicina, Universidad Catolica, San Antonio de Murcia, Campus de los Jeronimos, 135, Guadalupe 30107, Spain. ; 1] Grado en Medicina, Universidad Catolica, San Antonio de Murcia, Campus de los Jeronimos, 135, Guadalupe 30107, Spain [2] Fundacion Pedro Guillen, Clinica Cemtro, Avenida Ventisquero de la Condesa, 42, 28035 Madrid, Spain. ; Hospital Clinic of Barcelona, Carrer Villarroel, 170, 08036 Barcelona, Spain. ; University of California, Davis, Davis, California 95616, USA. ; The Salk Institute for Biological Studies, Peptide Biology Laboratory, La Jolla, California 92037, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/25945737" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cell Culture Techniques/methods ; Cell Line ; *Chimera ; Embryonic Stem Cells/cytology ; Female ; Germ Layers/cytology ; Humans ; Induced Pluripotent Stem Cells/cytology ; Male ; Mice ; Pan troglodytes ; Pluripotent Stem Cells/*cytology/metabolism ; Regenerative Medicine ; Species Specificity
    Print ISSN: 0028-0836
    Electronic ISSN: 1476-4687
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
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  • 8
    Publication Date: 2004-12-03
    Description: This section contains a number of special diagnostics that are designed to examine certain mechanisms. Section 1 reports on the method used to test the photochemical partitioning in the models. Sections 2 and 3 represent efforts to examine the model calculated production and removal rates for ozone and how the values are combined with transport rates in the models to produce the simulated ozone distributions. Sections 4 and 5 concentrate on polar processes including the dynamics aspect of vortex confinement and the chemical aspects of chlorine activation.
    Keywords: Geophysics
    Type: Models and Measurements Intercomparison 2; 363-448; NASA/TM-1999-209554
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  • 9
    Publication Date: 2018-06-11
    Description: We present measurements of unusually low mixing ratios of HNO3 in the exceptionally cold Arctic vortex of late-January and early-February 2005. The measurements were obtained by the airborne submillimeter radiometer ASUR during the polar aura validation experiment (PAVE). The distribution of HNO3 inside the vortex reaches minima below 4 ppbv around 22 km altitude and maxima above 13 ppbv around 16 km altitude, with a considerable spatial variability.
    Keywords: Geophysics
    Type: Geophysical Research Letters; Volume 32; L19811
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  • 10
    Publication Date: 2019-07-17
    Description: Photochemical loss of stratospheric ozone occurs primarily by catalytic cycles whose rates are limited by the concentration of OH, HO2, NO2, ClO, and/or BrO as well as the concentration of either atomic oxygen or of ozone itself. Once the concentrations of these gases are established, the photochemical loss rate of O3 depends on the rate coefficient of only a handful of key reactions. We have developed a method for testing our understanding of stratospheric ozone photochemistry by comparing measured and modeled concentrations of reactive hydrogen, nitrogen, chlorine and bromine radicals using a photochemical steady state model constrained by observed concentrations of long-lived precursors (e.g., NO(y), Cl(y), Br(y), O3, H2O, CH4) and environmental parameters such as ozone column, reflectivity, and aerosol surface area. We will show based on analyses of observations obtained by aircraft, balloon, and satellite platforms during the POLARIS campaign that our overall understanding of the processes that regulate these radical species is very good. The most notable current discrepancies are the tendency to underestimate observed NO2 by 15 to 30% for air masses that experience near continuous solar illumination over a 24 hour period and the tendency to underestimate observed OH and H02 by about 10 to 20% during midday and by much larger amounts at high solar zenith angle (SZA 〉 85). Possible resolutions to these discrepancies will be discussed. This study was carried out in close collaboration with many members of the POLARIS science team.
    Keywords: Geophysics
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