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  • 1
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    Anti-inflammatory activity of human IgG4 antibodies by dynamic Fab arm exchange (2007)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2007-09-18
    Description: Antibodies play a central role in immunity by forming an interface with the innate immune system and, typically, mediate proinflammatory activity. We describe a novel posttranslational modification that leads to anti-inflammatory activity of antibodies of immunoglobulin G, isotype 4 (IgG4). IgG4 antibodies are dynamic molecules that exchange Fab arms by swapping a heavy chain and attached light chain (half-molecule) with a heavy-light chain pair from another molecule, which results in bispecific antibodies. Mutagenesis studies revealed that the third constant domain is critical for this activity. The impact of IgG4 Fab arm exchange was confirmed in vivo in a rhesus monkey model with experimental autoimmune myasthenia gravis. IgG4 Fab arm exchange is suggested to be an important biological mechanism that provides the basis for the anti-inflammatory activity attributed to IgG4 antibodies.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉van der Neut Kolfschoten, Marijn -- Schuurman, Janine -- Losen, Mario -- Bleeker, Wim K -- Martinez-Martinez, Pilar -- Vermeulen, Ellen -- den Bleker, Tamara H -- Wiegman, Luus -- Vink, Tom -- Aarden, Lucien A -- De Baets, Marc H -- van de Winkel, Jan G J -- Aalberse, Rob C -- Parren, Paul W H I -- New York, N.Y. -- Science. 2007 Sep 14;317(5844):1554-7.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Sanquin Research-AMC Landsteiner Laboratory, Department of Immunopathology, Plesmanlaan 125, 1066 CX Amsterdam, the Netherlands.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17872445" target="_blank"〉PubMed〈/a〉
    Keywords: Allergens/immunology ; Animals ; Antibodies, Bispecific/immunology ; Antibodies, Monoclonal/immunology ; Antigens, CD20/immunology ; Antigens, Plant ; Autoantibodies/immunology ; Glycoproteins/immunology ; Humans ; Immunoglobulin Constant Regions/chemistry ; Immunoglobulin Fab Fragments/*chemistry/*immunology/metabolism ; Immunoglobulin G/*chemistry/*immunology/metabolism ; Immunoglobulin Heavy Chains ; Macaca mulatta ; Mice ; Mutation ; Myasthenia Gravis, Autoimmune, Experimental/immunology/prevention & control ; Protein Processing, Post-Translational ; Receptor, Epidermal Growth Factor/immunology ; Receptors, Cholinergic/immunology
    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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  • 2
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    Neutralizing antibodies derived from the B cells of 1918 influenza pandemic survivors (2008)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2008-08-22
    Description: Investigation of the human antibody response to influenza virus infection has been largely limited to serology, with relatively little analysis at the molecular level. The 1918 H1N1 influenza virus pandemic was the most severe of the modern era. Recent work has recovered the gene sequences of this unusual strain, so that the 1918 pandemic virus could be reconstituted to display its unique virulence phenotypes. However, little is known about adaptive immunity to this virus. We took advantage of the 1918 virus sequencing and the resultant production of recombinant 1918 haemagglutinin (HA) protein antigen to characterize at the clonal level neutralizing antibodies induced by natural exposure of survivors to the 1918 pandemic virus. Here we show that of the 32 individuals tested that were born in or before 1915, each showed seroreactivity with the 1918 virus, nearly 90 years after the pandemic. Seven of the eight donor samples tested had circulating B cells that secreted antibodies that bound the 1918 HA. We isolated B cells from subjects and generated five monoclonal antibodies that showed potent neutralizing activity against 1918 virus from three separate donors. These antibodies also cross-reacted with the genetically similar HA of a 1930 swine H1N1 influenza strain, but did not cross-react with HAs of more contemporary human influenza viruses. The antibody genes had an unusually high degree of somatic mutation. The antibodies bound to the 1918 HA protein with high affinity, had exceptional virus-neutralizing potency and protected mice from lethal infection. Isolation of viruses that escaped inhibition suggested that the antibodies recognize classical antigenic sites on the HA surface. Thus, these studies demonstrate that survivors of the 1918 influenza pandemic possess highly functional, virus-neutralizing antibodies to this uniquely virulent virus, and that humans can sustain circulating B memory cells to viruses for many decades after exposure-well into the tenth decade of life.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2848880/" 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/PMC2848880/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yu, Xiaocong -- Tsibane, Tshidi -- McGraw, Patricia A -- House, Frances S -- Keefer, Christopher J -- Hicar, Mark D -- Tumpey, Terrence M -- Pappas, Claudia -- Perrone, Lucy A -- Martinez, Osvaldo -- Stevens, James -- Wilson, Ian A -- Aguilar, Patricia V -- Altschuler, Eric L -- Basler, Christopher F -- Crowe, James E Jr -- AI057158/AI/NIAID NIH HHS/ -- AI42266/AI/NIAID NIH HHS/ -- CA55896/CA/NCI NIH HHS/ -- P01 AI058113/AI/NIAID NIH HHS/ -- R01 AI048677/AI/NIAID NIH HHS/ -- R01 AI048677-04/AI/NIAID NIH HHS/ -- U19 AI057229/AI/NIAID NIH HHS/ -- U19 AI62623/AI/NIAID NIH HHS/ -- U54 AI057157/AI/NIAID NIH HHS/ -- U54 AI057157-019002/AI/NIAID NIH HHS/ -- U54 AI57158/AI/NIAID NIH HHS/ -- England -- Nature. 2008 Sep 25;455(7212):532-6. doi: 10.1038/nature07231. Epub 2008 Aug 17.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Departments of Pediatrics, Vanderbilt University Medical Center, Nashville, Tennessee 37232, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18716625" target="_blank"〉PubMed〈/a〉
    Keywords: Aged, 80 and over ; Animals ; Antibodies, Monoclonal/genetics/immunology/isolation & purification ; Antibodies, Viral/genetics/*immunology/*isolation & purification ; B-Lymphocytes/*immunology ; Cell Line ; Cross Reactions/immunology ; *Disease Outbreaks/history ; Dogs ; Female ; History, 20th Century ; Humans ; Influenza A Virus, H1N1 Subtype/genetics/*immunology/physiology ; Influenza, Human/*immunology/virology ; Kinetics ; Mice ; Mice, Inbred BALB C ; Molecular Sequence Data ; Neutralization Tests ; *Survival
    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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    Identification of a dendritic cell receptor that couples sensing of necrosis to immunity (2009)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2009-02-17
    Description: Injury or impaired clearance of apoptotic cells leads to the pathological accumulation of necrotic corpses, which induce an inflammatory response that initiates tissue repair. In addition, antigens present in necrotic cells can sometimes provoke a specific immune response and it has been argued that necrosis could explain adaptive immunity in seemingly infection-free situations, such as after allograft transplantation or in spontaneous and therapy-induced tumour rejection. In the mouse, the CD8alpha+ subset of dendritic cells phagocytoses dead cell remnants and cross-primes CD8+ T cells against cell-associated antigens. Here we show that CD8alpha+ dendritic cells use CLEC9A (also known as DNGR-1), a recently-characterized C-type lectin, to recognize a preformed signal that is exposed on necrotic cells. Loss or blockade of CLEC9A does not impair the uptake of necrotic cell material by CD8+ dendritic cells, but specifically reduces cross-presentation of dead-cell-associated antigens in vitro and decreases the immunogenicity of necrotic cells in vivo. The function of CLEC9A requires a key tyrosine residue in its intracellular tail that allows the recruitment and activation of the tyrosine kinase SYK, which is also essential for cross-presentation of dead-cell-associated antigens. Thus, CLEC9A functions as a SYK-coupled C-type lectin receptor to mediate sensing of necrosis by the principal dendritic-cell subset involved in regulating cross-priming to cell-associated antigens.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2671489/" 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/PMC2671489/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sancho, David -- Joffre, Olivier P -- Keller, Anna M -- Rogers, Neil C -- Martinez, Dolores -- Hernanz-Falcon, Patricia -- Rosewell, Ian -- Reis e Sousa, Caetano -- A3598/Cancer Research UK/United Kingdom -- Cancer Research UK/United Kingdom -- England -- Nature. 2009 Apr 16;458(7240):899-903. doi: 10.1038/nature07750.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Immunobiology Laboratory, London Research Institute, Lincoln's Inn Fields Laboratories, 44 Lincoln's Inn Fields, London WC2A 3PX, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19219027" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antigens, CD8/metabolism ; CD8-Positive T-Lymphocytes/immunology ; Cells, Cultured ; Cross-Priming/immunology ; Dendritic Cells/*immunology/*metabolism ; Humans ; Lectins, C-Type/deficiency/genetics/*metabolism ; Ligands ; Mice ; Necrosis/*immunology/*metabolism ; Phagocytosis ; Receptors, Immunologic/deficiency/genetics/*metabolism ; Receptors, Mitogen/genetics/*metabolism ; 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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  • 4
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    Impact of genome reduction on bacterial metabolism and its regulation (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-12-08
    Description: To understand basic principles of bacterial metabolism organization and regulation, but also the impact of genome size, we systematically studied one of the smallest bacteria, Mycoplasma pneumoniae. A manually curated metabolic network of 189 reactions catalyzed by 129 enzymes allowed the design of a defined, minimal medium with 19 essential nutrients. More than 1300 growth curves were recorded in the presence of various nutrient concentrations. Measurements of biomass indicators, metabolites, and 13C-glucose experiments provided information on directionality, fluxes, and energetics; integration with transcription profiling enabled the global analysis of metabolic regulation. Compared with more complex bacteria, the M. pneumoniae metabolic network has a more linear topology and contains a higher fraction of multifunctional enzymes; general features such as metabolite concentrations, cellular energetics, adaptability, and global gene expression responses are similar, however.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Yus, Eva -- Maier, Tobias -- Michalodimitrakis, Konstantinos -- van Noort, Vera -- Yamada, Takuji -- Chen, Wei-Hua -- Wodke, Judith A H -- Guell, Marc -- Martinez, Sira -- Bourgeois, Ronan -- Kuhner, Sebastian -- Raineri, Emanuele -- Letunic, Ivica -- Kalinina, Olga V -- Rode, Michaela -- Herrmann, Richard -- Gutierrez-Gallego, Ricardo -- Russell, Robert B -- Gavin, Anne-Claude -- Bork, Peer -- Serrano, Luis -- New York, N.Y. -- Science. 2009 Nov 27;326(5957):1263-8. doi: 10.1126/science.1177263.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Centre for Genomic Regulation (CRG) and Universitat Pompeu Fabra, Avenida Dr. Aiguader 88, 08003 Barcelona, Spain.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19965476" target="_blank"〉PubMed〈/a〉
    Keywords: Adenosine Triphosphate/metabolism ; Bacterial Proteins/*metabolism ; Culture Media ; Energy Metabolism ; Enzymes/genetics/metabolism ; Gene Expression Profiling ; *Gene Expression Regulation, Bacterial ; *Genome, Bacterial ; Glycolysis ; *Metabolic Networks and Pathways ; Mycoplasma pneumoniae/*genetics/growth & development/*metabolism ; RNA, Bacterial/genetics/metabolism ; Signal Transduction ; Systems Biology ; Transcription, Genetic ; rRNA Operon
    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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  • 5
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    The genome of the sea urchin Strongylocentrotus purpuratus (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-11-11
    Description: We report the sequence and analysis of the 814-megabase genome of the sea urchin Strongylocentrotus purpuratus, a model for developmental and systems biology. The sequencing strategy combined whole-genome shotgun and bacterial artificial chromosome (BAC) sequences. This use of BAC clones, aided by a pooling strategy, overcame difficulties associated with high heterozygosity of the genome. The genome encodes about 23,300 genes, including many previously thought to be vertebrate innovations or known only outside the deuterostomes. This echinoderm genome provides an evolutionary outgroup for the chordates and yields insights into the evolution of deuterostomes.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3159423/" 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/PMC3159423/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Sea Urchin Genome Sequencing Consortium -- Sodergren, Erica -- Weinstock, George M -- Davidson, Eric H -- Cameron, R Andrew -- Gibbs, Richard A -- Angerer, Robert C -- Angerer, Lynne M -- Arnone, Maria Ina -- Burgess, David R -- Burke, Robert D -- Coffman, James A -- Dean, Michael -- Elphick, Maurice R -- Ettensohn, Charles A -- Foltz, Kathy R -- Hamdoun, Amro -- Hynes, Richard O -- Klein, William H -- Marzluff, William -- McClay, David R -- Morris, Robert L -- Mushegian, Arcady -- Rast, Jonathan P -- Smith, L Courtney -- Thorndyke, Michael C -- Vacquier, Victor D -- Wessel, Gary M -- Wray, Greg -- Zhang, Lan -- Elsik, Christine G -- Ermolaeva, Olga -- Hlavina, Wratko -- Hofmann, Gretchen -- Kitts, Paul -- Landrum, Melissa J -- Mackey, Aaron J -- Maglott, Donna -- Panopoulou, Georgia -- Poustka, Albert J -- Pruitt, Kim -- Sapojnikov, Victor -- Song, Xingzhi -- Souvorov, Alexandre -- Solovyev, Victor -- Wei, Zheng -- Whittaker, Charles A -- Worley, Kim -- Durbin, K James -- Shen, Yufeng -- Fedrigo, Olivier -- Garfield, David -- Haygood, Ralph -- Primus, Alexander -- Satija, Rahul -- Severson, Tonya -- Gonzalez-Garay, Manuel L -- Jackson, Andrew R -- Milosavljevic, Aleksandar -- Tong, Mark -- Killian, Christopher E -- Livingston, Brian T -- Wilt, Fred H -- Adams, Nikki -- Belle, Robert -- Carbonneau, Seth -- Cheung, Rocky -- Cormier, Patrick -- Cosson, Bertrand -- Croce, Jenifer -- Fernandez-Guerra, Antonio -- Geneviere, Anne-Marie -- Goel, Manisha -- Kelkar, Hemant -- Morales, Julia -- Mulner-Lorillon, Odile -- Robertson, Anthony J -- Goldstone, Jared V -- Cole, Bryan -- Epel, David -- Gold, Bert -- Hahn, Mark E -- Howard-Ashby, Meredith -- Scally, Mark -- Stegeman, John J -- Allgood, Erin L -- Cool, Jonah -- Judkins, Kyle M -- McCafferty, Shawn S -- Musante, Ashlan M -- Obar, Robert A -- Rawson, Amanda P -- Rossetti, Blair J -- Gibbons, Ian R -- Hoffman, Matthew P -- Leone, Andrew -- Istrail, Sorin -- Materna, Stefan C -- Samanta, Manoj P -- Stolc, Viktor -- Tongprasit, Waraporn -- Tu, Qiang -- Bergeron, Karl-Frederik -- Brandhorst, Bruce P -- Whittle, James -- Berney, Kevin -- Bottjer, David J -- Calestani, Cristina -- Peterson, Kevin -- Chow, Elly -- Yuan, Qiu Autumn -- Elhaik, Eran -- Graur, Dan -- Reese, Justin T -- Bosdet, Ian -- Heesun, Shin -- Marra, Marco A -- Schein, Jacqueline -- Anderson, Michele K -- Brockton, Virginia -- Buckley, Katherine M -- Cohen, Avis H -- Fugmann, Sebastian D -- Hibino, Taku -- Loza-Coll, Mariano -- Majeske, Audrey J -- Messier, Cynthia -- Nair, Sham V -- Pancer, Zeev -- Terwilliger, David P -- Agca, Cavit -- Arboleda, Enrique -- Chen, Nansheng -- Churcher, Allison M -- Hallbook, F -- Humphrey, Glen W -- Idris, Mohammed M -- Kiyama, Takae -- Liang, Shuguang -- Mellott, Dan -- Mu, Xiuqian -- Murray, Greg -- Olinski, Robert P -- Raible, Florian -- Rowe, Matthew -- Taylor, John S -- Tessmar-Raible, Kristin -- Wang, D -- Wilson, Karen H -- Yaguchi, Shunsuke -- Gaasterland, Terry -- Galindo, Blanca E -- Gunaratne, Herath J -- Juliano, Celina -- Kinukawa, Masashi -- Moy, Gary W -- Neill, Anna T -- Nomura, Mamoru -- Raisch, Michael -- Reade, Anna -- Roux, Michelle M -- Song, Jia L -- Su, Yi-Hsien -- Townley, Ian K -- Voronina, Ekaterina -- Wong, Julian L -- Amore, Gabriele -- Branno, Margherita -- Brown, Euan R -- Cavalieri, Vincenzo -- Duboc, Veronique -- Duloquin, Louise -- Flytzanis, Constantin -- Gache, Christian -- Lapraz, Francois -- Lepage, Thierry -- Locascio, Annamaria -- Martinez, Pedro -- Matassi, Giorgio -- Matranga, Valeria -- Range, Ryan -- Rizzo, Francesca -- Rottinger, Eric -- Beane, Wendy -- Bradham, Cynthia -- Byrum, Christine -- Glenn, Tom -- Hussain, Sofia -- Manning, Gerard -- Miranda, Esther -- Thomason, Rebecca -- Walton, Katherine -- Wikramanayke, Athula -- Wu, Shu-Yu -- Xu, Ronghui -- Brown, C Titus -- Chen, Lili -- Gray, Rachel F -- Lee, Pei Yun -- Nam, Jongmin -- Oliveri, Paola -- Smith, Joel -- Muzny, Donna -- Bell, Stephanie -- Chacko, Joseph -- Cree, Andrew -- Curry, Stacey -- Davis, Clay -- Dinh, Huyen -- Dugan-Rocha, Shannon -- Fowler, Jerry -- Gill, Rachel -- Hamilton, Cerrissa -- Hernandez, Judith -- Hines, Sandra -- Hume, Jennifer -- Jackson, Laronda -- Jolivet, Angela -- Kovar, Christie -- Lee, Sandra -- Lewis, Lora -- Miner, George -- Morgan, Margaret -- Nazareth, Lynne V -- Okwuonu, Geoffrey -- Parker, David -- Pu, Ling-Ling -- Thorn, Rachel -- Wright, Rita -- 2P42 ESO7381/PHS HHS/ -- 5 U54 HG003273/HG/NHGRI NIH HHS/ -- EY11930/EY/NEI NIH HHS/ -- F32 ESO12794/PHS HHS/ -- F32 HD047136/HD/NICHD NIH HHS/ -- F32 HD047136-02/HD/NICHD NIH HHS/ -- F32 HD047136-03/HD/NICHD NIH HHS/ -- F32-HD47136/HD/NICHD NIH HHS/ -- GM058231/GM/NIGMS NIH HHS/ -- GM070840/GM/NIGMS NIH HHS/ -- GM61005/GM/NIGMS NIH HHS/ -- GM61464/GM/NIGMS NIH HHS/ -- HD-37105/HD/NICHD NIH HHS/ -- HD039948/HD/NICHD NIH HHS/ -- HD14483/HD/NICHD NIH HHS/ -- HD66219/HD/NICHD NIH HHS/ -- P30-CA14051/CA/NCI NIH HHS/ -- R01 ES006272/ES/NIEHS NIH HHS/ -- R01 ES006272-13/ES/NIEHS NIH HHS/ -- R01 GM070840/GM/NIGMS NIH HHS/ -- R01 HD028152/HD/NICHD NIH HHS/ -- R01ES006272/ES/NIEHS NIH HHS/ -- R37-HD12896/HD/NICHD NIH HHS/ -- RR-15044/RR/NCRR NIH HHS/ -- S19916/Biotechnology and Biological Sciences Research Council/United Kingdom -- T32 GM007601/GM/NIGMS NIH HHS/ -- U54 HG003273/HG/NHGRI NIH HHS/ -- New York, N.Y. -- Science. 2006 Nov 10;314(5801):941-52.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17095691" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Calcification, Physiologic ; Cell Adhesion Molecules/genetics/physiology ; Complement Activation/genetics ; Computational Biology ; Embryonic Development/genetics ; Evolution, Molecular ; Gene Expression Regulation, Developmental ; Genes ; *Genome ; Immunity, Innate/genetics ; Immunologic Factors/genetics/physiology ; Male ; Nervous System Physiological Phenomena ; Proteins/genetics/physiology ; *Sequence Analysis, DNA ; Signal Transduction ; Strongylocentrotus purpuratus/embryology/*genetics/immunology/physiology ; Transcription Factors/genetics
    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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  • 6
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    Optical detection of DNA conformational polymorphism on single-walled carbon nanotubes (2006)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2006-01-28
    Description: The transition of DNA secondary structure from an analogous B to Z conformation modulates the dielectric environment of the single-walled carbon nanotube (SWNT) around which it is adsorbed. The SWNT band-gap fluorescence undergoes a red shift when an encapsulating 30-nucleotide oligomer is exposed to counter ions that screen the charged backbone. The transition is thermodynamically identical for DNA on and off the nanotube, except that the propagation length of the former is shorter by five-sixths. The magnitude of the energy shift is described by using an effective medium model and the DNA geometry on the nanotube sidewall. We demonstrate the detection of the B-Z change in whole blood, tissue, and from within living mammalian cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Heller, Daniel A -- Jeng, Esther S -- Yeung, Tsun-Kwan -- Martinez, Brittany M -- Moll, Anthonie E -- Gastala, Joseph B -- Strano, Michael S -- New York, N.Y. -- Science. 2006 Jan 27;311(5760):508-11.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Chemistry, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/16439657" target="_blank"〉PubMed〈/a〉
    Keywords: 3T3 Cells ; Absorption ; Adsorption ; Animals ; Cations, Divalent/chemistry ; Chickens ; Circular Dichroism ; DNA/blood/*chemistry ; DNA, Z-Form/blood/*chemistry ; Fluorescence ; Mathematics ; Mercury/analysis ; Mice ; Models, Molecular ; Muscle, Skeletal/chemistry ; *Nanotubes, Carbon ; *Nucleic Acid Conformation ; Oligodeoxyribonucleotides/chemistry ; Spectrometry, Fluorescence ; Thermodynamics
    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
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    Ethylene modulates stem cell division in the Arabidopsis thaliana root (2007)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2007-07-28
    Description: The construction of multicellular organisms depends on stem cells-cells that can both regenerate and produce daughter cells that undergo differentiation. Here, we show that the gaseous messenger ethylene modulates cell division in the cells of the quiescent center, which act as a source of stem cells in the seedling root. The cells formed through these ethylene-induced divisions express quiescent center-specific genes and can repress differentiation of surrounding initial cells, showing that quiescence is not required for these cells to signal to adjacent stem cells. We propose that ethylene is part of a signaling pathway that modulates cell division in the quiescent center in the stem cell niche during the postembryonic development of the root system.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ortega-Martinez, Olga -- Pernas, Monica -- Carol, Rachel J -- Dolan, Liam -- BBS/E/J/00000168/Biotechnology and Biological Sciences Research Council/United Kingdom -- New York, N.Y. -- Science. 2007 Jul 27;317(5837):507-10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Cell and Developmental Biology, John Innes Centre, Norwich NR4 7UH, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/17656722" target="_blank"〉PubMed〈/a〉
    Keywords: Amino Acids, Cyclic/metabolism/pharmacology ; Arabidopsis/*cytology/genetics/growth & development/metabolism ; Arabidopsis Proteins/genetics/metabolism ; Cell Differentiation ; *Cell Division ; Ethylenes/biosynthesis/*metabolism ; Gene Expression ; Genes, Plant ; Glycine/analogs & derivatives/pharmacology ; Indoleacetic Acids/metabolism ; Mutation ; Naphthaleneacetic Acids/pharmacology ; Plant Roots/*cytology/growth & development/metabolism ; Protein Kinases/genetics/metabolism ; Signal Transduction ; Stem Cells/*cytology
    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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  • 8
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    The cell and molecular basis of mechanical, cold, and inflammatory pain (2008)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2008-08-02
    Description: Peripheral pain pathways are activated by a range of stimuli. We used diphtheria toxin to kill all mouse postmitotic sensory neurons expressing the sodium channel Nav1.8. Mice showed normal motor activity and low-threshold mechanical and acute noxious heat responses but did not respond to noxious mechanical pressure or cold. They also showed a loss of enhanced pain responses and spontaneous pain behavior upon treatment with inflammatory insults. In contrast, nerve injury led to heightened pain sensitivity to thermal and mechanical stimuli indistinguishable from that seen with normal littermates. Pain behavior correlates well with central input from sensory neurons measured electrophysiologically in vivo. These data demonstrate that Na(v)1.8-expressing neurons are essential for mechanical, cold, and inflammatory pain but not for neuropathic pain or heat sensing.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Abrahamsen, Bjarke -- Zhao, Jing -- Asante, Curtis O -- Cendan, Cruz Miguel -- Marsh, Steve -- Martinez-Barbera, Juan Pedro -- Nassar, Mohammed A -- Dickenson, Anthony H -- Wood, John N -- BB/F000227/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- G9717869/Medical Research Council/United Kingdom -- Biotechnology and Biological Sciences Research Council/United Kingdom -- Medical Research Council/United Kingdom -- Wellcome Trust/United Kingdom -- New York, N.Y. -- Science. 2008 Aug 1;321(5889):702-5. doi: 10.1126/science.1156916.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Molecular Nociception Group, University College London (UCL), Gower Street, London, WC1E 6BT, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/18669863" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; *Cold Temperature ; Electrophysiology ; Freund's Adjuvant ; Hot Temperature ; Inflammation/*physiopathology ; Mice ; Mice, Knockout ; NAV1.8 Voltage-Gated Sodium Channel ; Neurons, Afferent/*physiology ; Nociceptors/physiology ; Pain/*physiopathology ; Pain Measurement ; Pain Threshold ; Pressure ; Sodium Channels/genetics/*metabolism ; TRPV Cation Channels/genetics/metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 9
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    Bcl6 mediates the development of T follicular helper cells (2009)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2009-07-25
    Description: A fundamental function of CD4+ helper T (T(H)) cells is the regulation of B cell-mediated humoral immunity. Development of T follicular helper (T(FH)) cells that provide help to B cells is mediated by the cytokines interleukin-6 and interleukin-21 but is independent of TH1, TH2, and TH17 effector cell lineages. Here, we characterize the function of Bcl6, a transcription factor selectively expressed in T(FH) cells. Bcl6 expression is regulated by interleukin-6 and interleukin-21. Bcl6 overexpression induced T(FH)-related gene expression and inhibited other T(H) lineage cell differentiation in a DNA binding-dependent manner. Moreover, Bcl6 deficiency in T cells resulted in impaired T(FH) cell development and germinal center reactions, and altered production of other effector T cell subsets. Our data thus illustrate that Bcl6 is required for programming of T(FH) cell generation.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2857334/" 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/PMC2857334/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Nurieva, Roza I -- Chung, Yeonseok -- Martinez, Gustavo J -- Yang, Xuexian O -- Tanaka, Shinya -- Matskevitch, Tatyana D -- Wang, Yi-Hong -- Dong, Chen -- R01 AI050746/AI/NIAID NIH HHS/ -- R01 AI050746-05/AI/NIAID NIH HHS/ -- R01 AI050761/AI/NIAID NIH HHS/ -- R01 AI050761-05/AI/NIAID NIH HHS/ -- R01 AI050761-06/AI/NIAID NIH HHS/ -- R01 AI050761-07A1/AI/NIAID NIH HHS/ -- R01 AI083761/AI/NIAID NIH HHS/ -- R01 AR050772/AR/NIAMS NIH HHS/ -- R01 AR050772-07/AR/NIAMS NIH HHS/ -- R01 AR050772-08/AR/NIAMS NIH HHS/ -- New York, N.Y. -- Science. 2009 Aug 21;325(5943):1001-5. doi: 10.1126/science.1176676. Epub 2009 Jul 23.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Immunology, M. D. Anderson Cancer Center, Houston, TX 77030, USA. rnurieva@mdanderson.org〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/19628815" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Antibody Formation ; B-Lymphocytes/immunology ; Cell Differentiation ; Cell Lineage ; Cytokines/immunology/metabolism ; DNA-Binding Proteins/deficiency/genetics/*metabolism ; Germinal Center/cytology/*immunology ; Immunoglobulins/biosynthesis ; Interleukin-6/immunology/metabolism ; Interleukins/immunology/metabolism ; Lymphocyte Activation ; Mice ; Mice, Inbred C57BL ; Mice, Transgenic ; Mutation ; RNA, Messenger/genetics/metabolism ; T-Lymphocyte Subsets/cytology/*immunology ; T-Lymphocytes, Helper-Inducer/cytology/*immunology ; Transcription Factors/genetics/*metabolism
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 10
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    Calidad ambiental de la zona costera del Golfo de Batabanó, Cuba (2008)
    CONyMA
    Details
    Publication Date: 2021-05-19
    Description: The anthropogenic affectation was evaluated on the coast N of the Gulf of Batabanó in May 2003 (corresponding to the provinces of Matanzas and Havana), in areas located in the line of the coast. The results were compared with the historical information of the sector. In the coast N and the Ensenada of the Broa, the parameters oxygen saturation, DBO5 and DQO showed characteristic high values of eutrofication. The biggest contribution in the Cianoficies was in the near coastal areas to sources of organic contamination. In the case of the nutrients they show specific data of mesothrofic waters with tendency to the eutrofization and the silts presented a high affectation for toxic metals. The area near to Guanímar is distinguished to present conditions of organic contamination that favor heterothrofic conditions, corroborated by a prevalence of the processes of mineralization of the organic matter over primary production and lows values of fitoplankton concentration. On the contrary, in the region of Surgidero of Batabanó, the processes of synthesis of organic matter prevail suggested by a high primary production, and concentration of fitoplankton, with low breathing levels and mineralization of the organic matter, that indicates that the system is behaving autothrofically. In a general way, this sector is very affected by the anthropogenic impact. The information obtained is of great importance for the development of the fishing and tourist industries in the area.
    Description: Published
    Keywords: Phytoplankton ; Water quality ; Primary production ; Chemistry ; Environmental monitoring ; Phytoplankton ; Water quality ; Primary production ; Chemistry ; Environmental monitoring
    Repository Name: AquaDocs
    Type: Proceedings Paper
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