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  • 1
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    Protection against malaria by intravenous immunization with a nonreplicating sporozoite vaccine (2013)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 2013-08-10
    Description: Consistent, high-level, vaccine-induced protection against human malaria has only been achieved by inoculation of Plasmodium falciparum (Pf) sporozoites (SPZ) by mosquito bites. We report that the PfSPZ Vaccine--composed of attenuated, aseptic, purified, cryopreserved PfSPZ--was safe and well tolerated when administered four to six times intravenously (IV) to 40 adults. Zero of six subjects receiving five doses and three of nine subjects receiving four doses of 1.35 x 10(5) PfSPZ Vaccine and five of six nonvaccinated controls developed malaria after controlled human malaria infection (P = 0.015 in the five-dose group and P = 0.028 for overall, both versus controls). PfSPZ-specific antibody and T cell responses were dose-dependent. These data indicate that there is a dose-dependent immunological threshold for establishing high-level protection against malaria that can be achieved with IV administration of a vaccine that is safe and meets regulatory standards.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Seder, Robert A -- Chang, Lee-Jah -- Enama, Mary E -- Zephir, Kathryn L -- Sarwar, Uzma N -- Gordon, Ingelise J -- Holman, LaSonji A -- James, Eric R -- Billingsley, Peter F -- Gunasekera, Anusha -- Richman, Adam -- Chakravarty, Sumana -- Manoj, Anita -- Velmurugan, Soundarapandian -- Li, MingLin -- Ruben, Adam J -- Li, Tao -- Eappen, Abraham G -- Stafford, Richard E -- Plummer, Sarah H -- Hendel, Cynthia S -- Novik, Laura -- Costner, Pamela J M -- Mendoza, Floreliz H -- Saunders, Jamie G -- Nason, Martha C -- Richardson, Jason H -- Murphy, Jittawadee -- Davidson, Silas A -- Richie, Thomas L -- Sedegah, Martha -- Sutamihardja, Awalludin -- Fahle, Gary A -- Lyke, Kirsten E -- Laurens, Matthew B -- Roederer, Mario -- Tewari, Kavita -- Epstein, Judith E -- Sim, B Kim Lee -- Ledgerwood, Julie E -- Graham, Barney S -- Hoffman, Stephen L -- VRC 312 Study Team -- 3R44AI055229-06S1/AI/NIAID NIH HHS/ -- 4R44AI055229-08/AI/NIAID NIH HHS/ -- 5R44AI058499-05/AI/NIAID NIH HHS/ -- N01-AI-40096/AI/NIAID NIH HHS/ -- Intramural NIH HHS/ -- Howard Hughes Medical Institute/ -- New York, N.Y. -- Science. 2013 Sep 20;341(6152):1359-65. doi: 10.1126/science.1241800. Epub 2013 Aug 8.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20852, USA. rseder@mail.nih.gov〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23929949" target="_blank"〉PubMed〈/a〉
    Keywords: Administration, Intravenous ; Adult ; Animals ; Cytokines/immunology ; Female ; Humans ; Immunity, Cellular ; Malaria Vaccines/*administration & dosage/adverse effects/*immunology ; Malaria, Falciparum/*prevention & control ; Male ; Mice ; Plasmodium falciparum/*immunology ; Sporozoites/immunology ; T-Lymphocytes/immunology ; Vaccination/adverse effects/methods
    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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    Isolation and characterization of a bat SARS-like coronavirus that uses the ACE2 receptor (2013)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2013-11-01
    Description: The 2002-3 pandemic caused by severe acute respiratory syndrome coronavirus (SARS-CoV) was one of the most significant public health events in recent history. An ongoing outbreak of Middle East respiratory syndrome coronavirus suggests that this group of viruses remains a key threat and that their distribution is wider than previously recognized. Although bats have been suggested to be the natural reservoirs of both viruses, attempts to isolate the progenitor virus of SARS-CoV from bats have been unsuccessful. Diverse SARS-like coronaviruses (SL-CoVs) have now been reported from bats in China, Europe and Africa, but none is considered a direct progenitor of SARS-CoV because of their phylogenetic disparity from this virus and the inability of their spike proteins to use the SARS-CoV cellular receptor molecule, the human angiotensin converting enzyme II (ACE2). Here we report whole-genome sequences of two novel bat coronaviruses from Chinese horseshoe bats (family: Rhinolophidae) in Yunnan, China: RsSHC014 and Rs3367. These viruses are far more closely related to SARS-CoV than any previously identified bat coronaviruses, particularly in the receptor binding domain of the spike protein. Most importantly, we report the first recorded isolation of a live SL-CoV (bat SL-CoV-WIV1) from bat faecal samples in Vero E6 cells, which has typical coronavirus morphology, 99.9% sequence identity to Rs3367 and uses ACE2 from humans, civets and Chinese horseshoe bats for cell entry. Preliminary in vitro testing indicates that WIV1 also has a broad species tropism. Our results provide the strongest evidence to date that Chinese horseshoe bats are natural reservoirs of SARS-CoV, and that intermediate hosts may not be necessary for direct human infection by some bat SL-CoVs. They also highlight the importance of pathogen-discovery programs targeting high-risk wildlife groups in emerging disease hotspots as a strategy for pandemic preparedness.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Ge, Xing-Yi -- Li, Jia-Lu -- Yang, Xing-Lou -- Chmura, Aleksei A -- Zhu, Guangjian -- Epstein, Jonathan H -- Mazet, Jonna K -- Hu, Ben -- Zhang, Wei -- Peng, Cheng -- Zhang, Yu-Ji -- Luo, Chu-Ming -- Tan, Bing -- Wang, Ning -- Zhu, Yan -- Crameri, Gary -- Zhang, Shu-Yi -- Wang, Lin-Fa -- Daszak, Peter -- Shi, Zheng-Li -- R01AI079231/AI/NIAID NIH HHS/ -- R01TW005869/TW/FIC NIH HHS/ -- R56TW009502/TW/FIC NIH HHS/ -- England -- Nature. 2013 Nov 28;503(7477):535-8. doi: 10.1038/nature12711. Epub 2013 Oct 30.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉1] Center for Emerging Infectious Diseases, State Key Laboratory of Virology, Wuhan Institute of Virology of the Chinese Academy of Sciences, Wuhan 430071, China [2].〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/24172901" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Cercopithecus aethiops ; China ; Chiroptera/*virology ; Disease Reservoirs/virology ; Feces/virology ; Fluorescent Antibody Technique ; Genome, Viral/genetics ; Host Specificity ; Humans ; Molecular Sequence Data ; Pandemics/prevention & control/veterinary ; Peptidyl-Dipeptidase A/genetics/*metabolism ; Real-Time Polymerase Chain Reaction ; Receptors, Virus/genetics/metabolism ; SARS Virus/genetics/*isolation & purification/*metabolism/ultrastructure ; Severe Acute Respiratory Syndrome/prevention & ; control/transmission/veterinary/virology ; Species Specificity ; Spike Glycoprotein, Coronavirus/chemistry/metabolism ; Vero Cells ; Virion/isolation & purification/ultrastructure ; Virus Internalization ; Viverridae/metabolism
    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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