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  • 1
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    Protective monotherapy against lethal Ebola virus infection by a potently neutralizing antibody (2016)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2016-02-27
    Description: Ebola virus disease in humans is highly lethal, with case fatality rates ranging from 25 to 90%. There is no licensed treatment or vaccine against the virus, underscoring the need for efficacious countermeasures. We ascertained that a human survivor of the 1995 Kikwit Ebola virus disease outbreak maintained circulating antibodies against the Ebola virus surface glycoprotein for more than a decade after infection. From this survivor we isolated monoclonal antibodies (mAbs) that neutralize recent and previous outbreak variants of Ebola virus and mediate antibody-dependent cell-mediated cytotoxicity in vitro. Strikingly, monotherapy with mAb114 protected macaques when given as late as 5 days after challenge. Treatment with a single human mAb suggests that a simplified therapeutic strategy for human Ebola infection may be possible.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Corti, Davide -- Misasi, John -- Mulangu, Sabue -- Stanley, Daphne A -- Kanekiyo, Masaru -- Wollen, Suzanne -- Ploquin, Aurelie -- Doria-Rose, Nicole A -- Staupe, Ryan P -- Bailey, Michael -- Shi, Wei -- Choe, Misook -- Marcus, Hadar -- Thompson, Emily A -- Cagigi, Alberto -- Silacci, Chiara -- Fernandez-Rodriguez, Blanca -- Perez, Laurent -- Sallusto, Federica -- Vanzetta, Fabrizia -- Agatic, Gloria -- Cameroni, Elisabetta -- Kisalu, Neville -- Gordon, Ingelise -- Ledgerwood, Julie E -- Mascola, John R -- Graham, Barney S -- Muyembe-Tamfun, Jean-Jacques -- Trefry, John C -- Lanzavecchia, Antonio -- Sullivan, Nancy J -- Intramural NIH HHS/ -- New York, N.Y. -- Science. 2016 Mar 18;351(6279):1339-42. doi: 10.1126/science.aad5224. Epub 2016 Feb 25.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Institute for Research in Biomedicine, Universita della Svizzera Italiana, CH-6500 Bellinzona, Switzerland. Humabs BioMed SA, 6500 Bellinzona, Switzerland. ; Vaccine Research Center, National Institute of Allergy and Infectious Diseases, Bethesda, MD 20892, USA. ; U.S. Army Medical Research Institute of Infectious Diseases, Fort Detrick, MD 21702, USA. ; Institute for Research in Biomedicine, Universita della Svizzera Italiana, CH-6500 Bellinzona, Switzerland. ; Humabs BioMed SA, 6500 Bellinzona, Switzerland. ; National Institute for Biomedical Research, National Laboratory of Public Health, Kinshasa B.P. 1197, Democratic Republic of the Congo. ; Institute for Research in Biomedicine, Universita della Svizzera Italiana, CH-6500 Bellinzona, Switzerland. Institute of Microbiology, ETH Zurich, CH-8093 Zurich, Switzerland. ; Vaccine Research Center, National Institute of Allergy and Infectious Diseases, Bethesda, MD 20892, USA. njsull@mail.nih.gov.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26917593" target="_blank"〉PubMed〈/a〉
    Keywords: Adult ; Animals ; Antibodies, Monoclonal/*administration & dosage/immunology/isolation & ; purification ; Antibodies, Neutralizing/*administration & dosage/immunology/isolation & ; purification ; Antibodies, Viral/*administration & dosage/immunology/isolation & purification ; Clinical Trials as Topic ; Disease Outbreaks ; Ebolavirus/*immunology ; Female ; Hemorrhagic Fever, Ebola/epidemiology/*prevention & control ; Humans ; Macaca ; Male ; Molecular Sequence Data ; Survivors
    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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  • 2
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    Structure and organization of heteromeric AMPA-type glutamate receptors (2016)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2016-03-12
    Description: AMPA-type glutamate receptors (AMPARs), which are central mediators of rapid neurotransmission and synaptic plasticity, predominantly exist as heteromers of the subunits GluA1 to GluA4. Here we report the first AMPAR heteromer structures, which deviate substantially from existing GluA2 homomer structures. Crystal structures of the GluA2/3 and GluA2/4 N-terminal domains reveal a novel compact conformation with an alternating arrangement of the four subunits around a central axis. This organization is confirmed by cysteine cross-linking in full-length receptors, and it permitted us to determine the structure of an intact GluA2/3 receptor by cryogenic electron microscopy. Two models in the ligand-free state, at resolutions of 8.25 and 10.3 angstroms, exhibit substantial vertical compression and close associations between domain layers, reminiscent of N-methyl-D-aspartate receptors. Model 1 resembles a resting state and model 2 a desensitized state, thus providing snapshots of gating transitions in the nominal absence of ligand. Our data reveal organizational features of heteromeric AMPARs and provide a framework to decipher AMPAR architecture and signaling.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4852135/" 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/PMC4852135/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Herguedas, Beatriz -- Garcia-Nafria, Javier -- Cais, Ondrej -- Fernandez-Leiro, Rafael -- Krieger, James -- Ho, Hinze -- Greger, Ingo H -- MC_U105174197/Medical Research Council/United Kingdom -- New York, N.Y. -- Science. 2016 Apr 29;352(6285):aad3873. doi: 10.1126/science.aad3873. Epub 2016 Mar 10.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Neurobiology Division, Medical Research Council (MRC) Laboratory of Molecular Biology, Cambridge, UK. ; Structural Studies Division, MRC Laboratory of Molecular Biology, Cambridge, UK.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/26966189" target="_blank"〉PubMed〈/a〉
    Keywords: Brain/metabolism ; Cryoelectron Microscopy ; Crystallography, X-Ray ; HEK293 Cells ; Humans ; Ligands ; Models, Molecular ; *Protein Multimerization ; Protein Structure, Tertiary ; Receptors, AMPA/*chemistry/ultrastructure
    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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  • 3
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    A long noncoding RNA associated with susceptibility to celiac disease (2016)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2016-04-02
    Description: Recent studies have implicated long noncoding RNAs (lncRNAs) as regulators of many important biological processes. Here we report on the identification and characterization of a lncRNA, lnc13, that harbors a celiac disease-associated haplotype block and represses expression of certain inflammatory genes under homeostatic conditions. Lnc13 regulates gene expression by binding to hnRNPD, a member of a family of ubiquitously expressed heterogeneous nuclear ribonucleoproteins (hnRNPs). Upon stimulation, lnc13 levels are reduced, thereby allowing increased expression of the repressed genes. Lnc13 levels are significantly decreased in small intestinal biopsy samples from patients with celiac disease, which suggests that down-regulation of lnc13 may contribute to the inflammation seen in this disease. Furthermore, the lnc13 disease-associated variant binds hnRNPD less efficiently than its wild-type counterpart, thus helping to explain how these single-nucleotide polymorphisms contribute to celiac disease.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Castellanos-Rubio, Ainara -- Fernandez-Jimenez, Nora -- Kratchmarov, Radomir -- Luo, Xiaobing -- Bhagat, Govind -- Green, Peter H R -- Schneider, Robert -- Kiledjian, Megerditch -- Bilbao, Jose Ramon -- Ghosh, Sankar -- R01-AI093985/AI/NIAID NIH HHS/ -- R01-DK102180/DK/NIDDK NIH HHS/ -- R01-GM067005/GM/NIGMS NIH HHS/ -- R37-AI33443/AI/NIAID NIH HHS/ -- New York, N.Y. -- Science. 2016 Apr 1;352(6281):91-5. doi: 10.1126/science.aad0467.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Microbiology and Immunology, Columbia University, College of Physicians and Surgeons, New York, NY 10032, USA. ; Department of Genetics, Physical Anthropology, and Animal Physiology, University of the Basque Country (UPV-EHU), BioCruces Research Institute, Leioa 48940, Basque Country, Spain. ; Department of Pathology and Cell Biology, Columbia University, College of Physicians and Surgeons, New York, NY 10032, USA. ; Center for Celiac Disease, Department of Medicine, Columbia University, College of Physicians and Surgeons, New York, NY 10032, USA. Alexandria Center for Life Sciences, New York University School of Medicine, New York, NY 10016, USA. ; Alexandria Center for Life Sciences, New York University School of Medicine, New York, NY 10016, USA. ; Department of Cell Biology and Neuroscience, Rutgers, The State University of New Jersey, Piscataway, NJ 08854, USA. ; Department of Microbiology and Immunology, Columbia University, College of Physicians and Surgeons, New York, NY 10032, USA. sg2715@columbia.edu.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/27034373" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Base Sequence ; Celiac Disease/*genetics/pathology ; Down-Regulation ; Gene Expression Regulation ; *Genetic Predisposition to Disease ; Haplotypes ; Heterogeneous-Nuclear Ribonucleoproteins/genetics ; Humans ; Inflammation/*genetics ; Mice ; Molecular Sequence Data ; Polymorphism, Single Nucleotide ; RNA, Long Noncoding/*genetics
    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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