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Brown WC, McElwain TF, Hötzel I, Ruef BJ, Rice-Ficht AC, Stich RW, Suarez CE, Estes DM, Palmer GH. Immunodominant T-cell antigens and epitopes ofBabesia bovisandBabesia bigemina. Annals of Tropical Medicine & Parasitology 2016. [DOI: 10.1080/00034983.1998.11813305] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Aab A, Abreu P, Aglietta M, Ahn EJ, Samarai IA, Albuquerque IFM, Allekotte I, Allen J, Allison P, Almela A, Castillo JA, Alvarez-Muñiz J, Batista RA, Ambrosio M, Aminaei A, Anchordoqui L, Andringa S, Aramo C, Aranda VM, Arqueros F, Asorey H, Assis P, Aublin J, Ave M, Avenier M, Avila G, Awal N, Badescu AM, Barber KB, Bäuml J, Baus C, Beatty JJ, Becker KH, Bellido JA, Berat C, Bertaina ME, Bertou X, Biermann PL, Billoir P, Blaess S, Blanco M, Bleve C, Blümer H, Boháčová M, Boncioli D, Bonifazi C, Bonino R, Borodai N, Brack J, Brancus I, Bridgeman A, Brogueira P, Brown WC, Buchholz P, Bueno A, Buitink S, Buscemi M, Caballero-Mora KS, Caccianiga B, Caccianiga L, Candusso M, Caramete L, Caruso R, Castellina A, Cataldi G, Cazon L, Cester R, Chavez AG, Chiavassa A, Chinellato JA, Chudoba J, Cilmo M, Clay RW, Cocciolo G, Colalillo R, Coleman A, Collica L, Coluccia MR, Conceição R, Contreras F, Cooper MJ, Cordier A, Coutu S, Covault CE, Cronin J, Curutiu A, Dallier R, Daniel B, Dasso S, Daumiller K, Dawson BR, Almeida RMD, Domenico MD, Jong SJD, Neto JRTDM, Mitri ID, Oliveira JD, Souza VD, Peral LD, Deligny O, Dembinski H, Dhital N, Giulio CD, Matteo AD, Diaz JC, Castro MLD, Diogo F, Dobrigkeit C, Docters W, D’Olivo JC, Dorofeev A, Hasankiadeh QD, Dova MT, Ebr J, Engel R, Erdmann M, Erfani M, Escobar CO, Espadanal J, Etchegoyen A, Luis PFS, Falcke H, Fang K, Farrar G, Fauth AC, Fazzini N, Ferguson AP, Fernandes M, Fick B, Figueira JM, Filevich A, Filipčič A, Fox BD, Fratu O, Fröhlich U, Fuchs B, Fujii T, Gaior R, García B, Roca STG, Garcia-Gamez D, Garcia-Pinto D, Garilli G, Bravo AG, Gate F, Gemmeke H, Ghia PL, Giaccari U, Giammarchi M, Giller M, Glaser C, Glass H, Berisso MG, Vitale PFG, Gonçalves P, Gonzalez JG, González N, Gookin B, Gordon J, Gorgi A, Gorham P, Gouffon P, Grebe S, Griffith N, Grillo AF, Grubb TD, Guarino F, Guedes GP, Hampel MR, Hansen P, Harari D, Harrison TA, Hartmann S, Harton JL, Haungs A, Hebbeker T, Heck D, Heimann P, Herve AE, Hill GC, Hojvat C, Hollon N, Holt E, Homola P, Hörandel JR, Horvath P, Hrabovský M, Huber D, Huege T, Insolia A, Isar PG, Jandt I, Jansen S, Jarne C, Josebachuili M, Kääpä A, Kambeitz O, Kampert KH, Kasper P, Katkov I, Kégl B, Keilhauer B, Keivani A, Kemp E, Kieckhafer RM, Klages HO, Kleifges M, Kleinfeller J, Krause R, Krohm N, Krömer O, Kruppke-Hansen D, Kuempel D, Kunka N, LaHurd D, Latronico L, Lauer R, Lauscher M, Lautridou P, Coz SL, Leão MSAB, Lebrun D, Lebrun P, Oliveira MALD, Letessier-Selvon A, Lhenry-Yvon I, Link K, López R, Agüera AL, Louedec K, Bahilo JL, Lu L, Lucero A, Ludwig M, Malacari M, Maldera S, Mallamaci M, Maller J, Mandat D, Mantsch P, Mariazzi AG, Marin V, Mariş IC, Marsella G, Martello D, Martin L, Martinez H, Bravo OM, Martraire D, Meza JJM, Mathes HJ, Mathys S, Matthews J, Matthews JAJ, Matthiae G, Maurel D, Maurizio D, Mayotte E, Mazur PO, Medina C, Medina-Tanco G, Meissner R, Melissas M, Melo D, Menshikov A, Messina S, Meyhandan R, Mićanović S, Micheletti MI, Middendorf L, Minaya IA, Miramonti L, Mitrica B, Molina-Bueno L, Mollerach S, Monasor M, Ragaigne DM, Montanet F, Morello C, Mostafá M, Moura CA, Muller MA, Müller G, Müller S, Münchmeyer M, Mussa R, Navarra G, Navas S, Necesal P, Nellen L, Nelles A, Neuser J, Nguyen P, Niechciol M, Niemietz L, Niggemann T, Nitz D, Nosek D, Novotny V, Nožka L, Ochilo L, Olinto A, Oliveira M, Pacheco N, Selmi-Dei DP, Palatka M, Pallotta J, Palmieri N, Papenbreer P, Parente G, Parra A, Paul T, Pech M, Pȩkala J, Pelayo R, Pepe IM, Perrone L, Petermann E, Peters C, Petrera S, Petrov Y, Phuntsok J, Piegaia R, Pierog T, Pieroni P, Pimenta M, Pirronello V, Platino M, Plum M, Porcelli A, Porowski C, Prado RR, Privitera P, Prouza M, Purrello V, Quel EJ, Querchfeld S, Quinn S, Rautenberg J, Ravel O, Ravignani D, Revenu B, Ridky J, Riggi S, Risse M, Ristori P, Rizi V, Carvalho WRD, Cabo IR, Fernandez GR, Rojo JR, Rodríguez-Frías MD, Rogozin D, Ros G, Rosado J, Rossler T, Roth M, Roulet E, Rovero AC, Saffi SJ, Saftoiu A, Salamida F, Salazar H, Saleh A, Greus FS, Salina G, Sánchez F, Sanchez-Lucas P, Santo CE, Santos E, Santos EM, Sarazin F, Sarkar B, Sarmento R, Sato R, Scharf N, Scherini V, Schieler H, Schiffer P, Schmidt D, Schröder FG, Scholten O, Schoorlemmer H, Schovánek P, Schulz A, Schulz J, Schumacher J, Sciutto SJ, Segreto A, Settimo M, Shadkam A, Shellard RC, Sidelnik I, Sigl G, Sima O, kowski AŚ, Šmída R, Snow GR, Sommers P, Sorokin J, Squartini R, Srivastava YN, Stanič S, Stapleton J, Stasielak J, Stephan M, Stutz A, Suarez F, Suomijärvi T, Supanitsky AD, Sutherland MS, Swain J, Szadkowski Z, Szuba M, Taborda OA, Tapia A, Tartare M, Tepe A, Theodoro VM, Timmermans C, Peixoto CJT, Toma G, Tomankova L, Tomé B, Tonachini A, Elipe GT, Machado DT, Travnicek P, Trovato E, Tueros M, Ulrich R, Unger M, Urban M, Galicia JFV, Valiño I, Valore L, Aar GV, Bodegom PV, Berg AMVD, Velzen SV, Vliet AV, Varela E, Vargas Cárdenas B, Varner G, Vázquez JR, Vázquez RA, Veberič D, Verzi V, Vicha J, Videla M, Villaseñor L, Vlcek B, Vorobiov S, Wahlberg H, Wainberg O, Walz D, Watson AA, Weber M, Weidenhaupt K, Weindl A, Werner F, Widom A, Wiencke L, Wilczyńska B, Wilczyński H, Will M, Williams C, Winchen T, Wittkowski D, Wundheiler B, Wykes S, Yamamoto T, Yapici T, Yuan G, Yushkov A, Zamorano B, Zas E, Zavrtanik D, Zavrtanik M, Zaw I, Zepeda A, Zhou J, Zhu Y, Silva MZ, Ziolkowski M, Zuccarello F. Search for patterns by combining cosmic-ray energy and arrival directions at the Pierre Auger Observatory. Eur Phys J C Part Fields 2015; 75:269. [PMID: 26120280 PMCID: PMC4477714 DOI: 10.1140/epjc/s10052-015-3471-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/03/2014] [Accepted: 05/20/2015] [Indexed: 06/04/2023]
Abstract
Energy-dependent patterns in the arrival directions of cosmic rays are searched for using data of the Pierre Auger Observatory. We investigate local regions around the highest-energy cosmic rays with [Formula: see text] eV by analyzing cosmic rays with energies above [Formula: see text] eV arriving within an angular separation of approximately 15[Formula: see text]. We characterize the energy distributions inside these regions by two independent methods, one searching for angular dependence of energy-energy correlations and one searching for collimation of energy along the local system of principal axes of the energy distribution. No significant patterns are found with this analysis. The comparison of these measurements with astrophysical scenarios can therefore be used to obtain constraints on related model parameters such as strength of cosmic-ray deflection and density of point sources.
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Affiliation(s)
- A. Aab
- />Universität Siegen, Siegen, Germany
| | - P. Abreu
- />Laboratório de Instrumentação e Física Experimental de Partículas - LIP and Instituto Superior Técnico - IST, Universidade de Lisboa - UL, Lisbon, Portugal
| | - M. Aglietta
- />Osservatorio Astrofisico di Torino (INAF), Università di Torino and Sezione INFN, Torino, Italy
| | | | - I. Al Samarai
- />Institut de Physique Nucléaire d’Orsay (IPNO), Université Paris 11, CNRS-IN2P3, Orsay, France
| | | | - I. Allekotte
- />Centro Atómico Bariloche and Instituto Balseiro (CNEA-UNCuyo-CONICET), San Carlos de Bariloche, Argentina
| | - J. Allen
- />New York University, New York, NY USA
| | - P. Allison
- />Ohio State University, Columbus, OH USA
| | - A. Almela
- />Instituto de Tecnologías en Detección y Astropartículas (CNEA, CONICET, UNSAM), Buenos Aires, Argentina
- />Universidad Tecnológica Nacional - Facultad Regional Buenos Aires, Buenos Aires, Argentina
| | | | - J. Alvarez-Muñiz
- />Universidad de Santiago de Compostela, Santiago de Compostela, Spain
| | | | - M. Ambrosio
- />Università di Napoli “Federico II” and Sezione INFN, Napoli, Italy
| | - A. Aminaei
- />IMAPP, Radboud University Nijmegen, Nijmegen, Netherlands
| | - L. Anchordoqui
- />Department of Physics and Astronomy, City University of New York, New York, USA
| | - S. Andringa
- />Laboratório de Instrumentação e Física Experimental de Partículas - LIP and Instituto Superior Técnico - IST, Universidade de Lisboa - UL, Lisbon, Portugal
| | - C. Aramo
- />Università di Napoli “Federico II” and Sezione INFN, Napoli, Italy
| | - V. M. Aranda
- />Universidad Complutense de Madrid, Madrid, Spain
| | - F. Arqueros
- />Universidad Complutense de Madrid, Madrid, Spain
| | - H. Asorey
- />Centro Atómico Bariloche and Instituto Balseiro (CNEA-UNCuyo-CONICET), San Carlos de Bariloche, Argentina
| | - P. Assis
- />Laboratório de Instrumentação e Física Experimental de Partículas - LIP and Instituto Superior Técnico - IST, Universidade de Lisboa - UL, Lisbon, Portugal
| | - J. Aublin
- />Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), Universités Paris 6 et Paris 7, CNRS-IN2P3, Paris, France
| | - M. Ave
- />Universidad de Santiago de Compostela, Santiago de Compostela, Spain
| | - M. Avenier
- />Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Grenoble-Alpes, CNRS/IN2P3, Grenoble, France
| | - G. Avila
- />Observatorio Pierre Auger and Comisión Nacional de Energía Atómica, Malargüe, Argentina
| | - N. Awal
- />New York University, New York, NY USA
| | - A. M. Badescu
- />University Politehnica of Bucharest, Bucharest, Romania
| | - K. B. Barber
- />University of Adelaide, Adelaide, SA Australia
| | - J. Bäuml
- />Karlsruhe Institute of Technology - Campus South - Institut für Experimentelle, Kernphysik (IEKP), Karlsruhe, Germany
| | - C. Baus
- />Karlsruhe Institute of Technology - Campus South - Institut für Experimentelle, Kernphysik (IEKP), Karlsruhe, Germany
| | | | - K. H. Becker
- />Bergische Universität Wuppertal, Wuppertal, Germany
| | | | - C. Berat
- />Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Grenoble-Alpes, CNRS/IN2P3, Grenoble, France
| | - M. E. Bertaina
- />Osservatorio Astrofisico di Torino (INAF), Università di Torino and Sezione INFN, Torino, Italy
| | - X. Bertou
- />Centro Atómico Bariloche and Instituto Balseiro (CNEA-UNCuyo-CONICET), San Carlos de Bariloche, Argentina
| | - P. L. Biermann
- />Max-Planck-Institut für Radioastronomie, Bonn, Germany
| | - P. Billoir
- />Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), Universités Paris 6 et Paris 7, CNRS-IN2P3, Paris, France
| | - S. Blaess
- />University of Adelaide, Adelaide, SA Australia
| | - M. Blanco
- />Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), Universités Paris 6 et Paris 7, CNRS-IN2P3, Paris, France
| | - C. Bleve
- />Dipartimento di Matematica e Fisica “E. De Giorgi” dell’Università del Salento and Sezione INFN, Lecce, Italy
| | - H. Blümer
- />Karlsruhe Institute of Technology - Campus South - Institut für Experimentelle, Kernphysik (IEKP), Karlsruhe, Germany
- />Karlsruhe Institute of Technology - Campus North - Institut für Kernphysik, Karlsruhe, Germany
| | - M. Boháčová
- />Institute of Physics of the Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - D. Boncioli
- />INFN, Laboratori Nazionali del Gran Sasso, Assergi, L’Aquila Italy
| | - C. Bonifazi
- />Instituto de Física, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ Brazil
| | - R. Bonino
- />Osservatorio Astrofisico di Torino (INAF), Università di Torino and Sezione INFN, Torino, Italy
| | - N. Borodai
- />Institute of Nuclear Physics PAN, Krakow, Poland
| | - J. Brack
- />Colorado State University, Fort Collins, CO USA
| | - I. Brancus
- />’Horia Hulubei’ National Institute for Physics and Nuclear Engineering, Bucharest-Magurele, Romania
| | - A. Bridgeman
- />Karlsruhe Institute of Technology - Campus North - Institut für Kernphysik, Karlsruhe, Germany
| | - P. Brogueira
- />Laboratório de Instrumentação e Física Experimental de Partículas - LIP and Instituto Superior Técnico - IST, Universidade de Lisboa - UL, Lisbon, Portugal
| | | | | | - A. Bueno
- />Universidad de Granada and C.A.F.P.E., Granada, Spain
| | - S. Buitink
- />IMAPP, Radboud University Nijmegen, Nijmegen, Netherlands
| | - M. Buscemi
- />Università di Napoli “Federico II” and Sezione INFN, Napoli, Italy
| | - K. S. Caballero-Mora
- />Centro de Investigación y de Estudios Avanzados del IPN (CINVESTAV), Mexico, Mexico
| | - B. Caccianiga
- />Università di Milano and Sezione INFN, Milan, Italy
| | - L. Caccianiga
- />Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), Universités Paris 6 et Paris 7, CNRS-IN2P3, Paris, France
| | - M. Candusso
- />Università di Roma II “Tor Vergata” and Sezione INFN, Roma, Italy
| | - L. Caramete
- />Max-Planck-Institut für Radioastronomie, Bonn, Germany
| | - R. Caruso
- />Università di Catania and Sezione INFN, Catania, Italy
| | - A. Castellina
- />Osservatorio Astrofisico di Torino (INAF), Università di Torino and Sezione INFN, Torino, Italy
| | - G. Cataldi
- />Dipartimento di Matematica e Fisica “E. De Giorgi” dell’Università del Salento and Sezione INFN, Lecce, Italy
| | - L. Cazon
- />Laboratório de Instrumentação e Física Experimental de Partículas - LIP and Instituto Superior Técnico - IST, Universidade de Lisboa - UL, Lisbon, Portugal
| | - R. Cester
- />Università di Torino and Sezione INFN, Torino, Italy
| | - A. G. Chavez
- />Universidad Michoacana de San Nicolas de Hidalgo, Morelia, Michoacan Mexico
| | - A. Chiavassa
- />Osservatorio Astrofisico di Torino (INAF), Università di Torino and Sezione INFN, Torino, Italy
| | | | - J. Chudoba
- />Institute of Physics of the Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - M. Cilmo
- />Università di Napoli “Federico II” and Sezione INFN, Napoli, Italy
| | - R. W. Clay
- />University of Adelaide, Adelaide, SA Australia
| | - G. Cocciolo
- />Dipartimento di Matematica e Fisica “E. De Giorgi” dell’Università del Salento and Sezione INFN, Lecce, Italy
| | - R. Colalillo
- />Università di Napoli “Federico II” and Sezione INFN, Napoli, Italy
| | - A. Coleman
- />Pennsylvania State University, University Park, PA USA
| | - L. Collica
- />Università di Milano and Sezione INFN, Milan, Italy
| | - M. R. Coluccia
- />Dipartimento di Matematica e Fisica “E. De Giorgi” dell’Università del Salento and Sezione INFN, Lecce, Italy
| | - R. Conceição
- />Laboratório de Instrumentação e Física Experimental de Partículas - LIP and Instituto Superior Técnico - IST, Universidade de Lisboa - UL, Lisbon, Portugal
| | - F. Contreras
- />Observatorio Pierre Auger, Malargüe, Argentina
| | - M. J. Cooper
- />University of Adelaide, Adelaide, SA Australia
| | - A. Cordier
- />Laboratoire de l’Accélérateur Linéaire (LAL), Université Paris 11, CNRS-IN2P3, Orsay, France
| | - S. Coutu
- />Pennsylvania State University, University Park, PA USA
| | - C. E. Covault
- />Case Western Reserve University, Cleveland, OH USA
| | - J. Cronin
- />Enrico Fermi Institute, University of Chicago, Chicago, IL USA
| | - A. Curutiu
- />Max-Planck-Institut für Radioastronomie, Bonn, Germany
| | - R. Dallier
- />Station de Radioastronomie de Nançay, Observatoire de Paris, CNRS/INSU, Nançay, France
- />SUBATECH, École des Mines de Nantes, CNRS-IN2P3, Université de Nantes, Nantes, France
| | - B. Daniel
- />Universidade Estadual de Campinas, IFGW, Campinas, SP Brazil
| | - S. Dasso
- />Departamento de Física, FCEyN Universidad de Buenos Aires y CONICET, Buenos Aires, Argentina
- />Instituto de Astronomía y Física del Espacio (CONICET-UBA), Buenos Aires, Argentina
| | - K. Daumiller
- />Karlsruhe Institute of Technology - Campus North - Institut für Kernphysik, Karlsruhe, Germany
| | - B. R. Dawson
- />University of Adelaide, Adelaide, SA Australia
| | - R. M. de Almeida
- />Universidade Federal Fluminense, EEIMVR, Volta Redonda, RJ Brazil
| | - M. De Domenico
- />Università di Catania and Sezione INFN, Catania, Italy
| | - S. J. de Jong
- />IMAPP, Radboud University Nijmegen, Nijmegen, Netherlands
- />Nikhef, Science Park, Amsterdam, Netherlands
| | - J. R. T. de Mello Neto
- />Instituto de Física, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ Brazil
| | - I. De Mitri
- />Dipartimento di Matematica e Fisica “E. De Giorgi” dell’Università del Salento and Sezione INFN, Lecce, Italy
| | - J. de Oliveira
- />Universidade Federal Fluminense, EEIMVR, Volta Redonda, RJ Brazil
| | - V. de Souza
- />Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos, SP Brazil
| | - L. del Peral
- />Universidad de Alcalá, Alcalá de Henares, Madrid Spain
| | - O. Deligny
- />Institut de Physique Nucléaire d’Orsay (IPNO), Université Paris 11, CNRS-IN2P3, Orsay, France
| | - H. Dembinski
- />Karlsruhe Institute of Technology - Campus North - Institut für Kernphysik, Karlsruhe, Germany
| | - N. Dhital
- />Michigan Technological University, Houghton, MI USA
| | - C. Di Giulio
- />Università di Roma II “Tor Vergata” and Sezione INFN, Roma, Italy
| | - A. Di Matteo
- />Dipartimento di Scienze Fisiche e Chimiche dell’Università dell’Aquila and INFN, L’Aquila, Italy
| | - J. C. Diaz
- />Michigan Technological University, Houghton, MI USA
| | | | - F. Diogo
- />Laboratório de Instrumentação e Física Experimental de Partículas - LIP and Instituto Superior Técnico - IST, Universidade de Lisboa - UL, Lisbon, Portugal
| | - C. Dobrigkeit
- />Universidade Estadual de Campinas, IFGW, Campinas, SP Brazil
| | - W. Docters
- />KVI - Center for Advanced Radiation Technology, University of Groningen, Groningen, Netherlands
| | - J. C. D’Olivo
- />Universidad Nacional Autonoma de Mexico, Mexico, D.F., Mexico
| | - A. Dorofeev
- />Colorado State University, Fort Collins, CO USA
| | - Q. Dorosti Hasankiadeh
- />Karlsruhe Institute of Technology - Campus North - Institut für Kernphysik, Karlsruhe, Germany
| | - M. T. Dova
- />IFLP, Universidad Nacional de La Plata and CONICET, La Plata, Argentina
| | - J. Ebr
- />Institute of Physics of the Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - R. Engel
- />Karlsruhe Institute of Technology - Campus North - Institut für Kernphysik, Karlsruhe, Germany
| | - M. Erdmann
- />RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany
| | - M. Erfani
- />Universität Siegen, Siegen, Germany
| | - C. O. Escobar
- />Universidade Estadual de Campinas, IFGW, Campinas, SP Brazil
- />Fermilab, Batavia, IL USA
| | - J. Espadanal
- />Laboratório de Instrumentação e Física Experimental de Partículas - LIP and Instituto Superior Técnico - IST, Universidade de Lisboa - UL, Lisbon, Portugal
| | - A. Etchegoyen
- />Instituto de Tecnologías en Detección y Astropartículas (CNEA, CONICET, UNSAM), Buenos Aires, Argentina
- />Universidad Tecnológica Nacional - Facultad Regional Buenos Aires, Buenos Aires, Argentina
| | | | - H. Falcke
- />IMAPP, Radboud University Nijmegen, Nijmegen, Netherlands
- />Nikhef, Science Park, Amsterdam, Netherlands
- />ASTRON, Dwingeloo, Netherlands
| | - K. Fang
- />Enrico Fermi Institute, University of Chicago, Chicago, IL USA
| | - G. Farrar
- />New York University, New York, NY USA
| | - A. C. Fauth
- />Universidade Estadual de Campinas, IFGW, Campinas, SP Brazil
| | | | | | - M. Fernandes
- />Instituto de Física, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ Brazil
| | - B. Fick
- />Michigan Technological University, Houghton, MI USA
| | - J. M. Figueira
- />Instituto de Tecnologías en Detección y Astropartículas (CNEA, CONICET, UNSAM), Buenos Aires, Argentina
| | - A. Filevich
- />Instituto de Tecnologías en Detección y Astropartículas (CNEA, CONICET, UNSAM), Buenos Aires, Argentina
| | - A. Filipčič
- />Experimental Particle Physics Department, J. Stefan Institute, Ljubljana, Slovenia
- />Laboratory for Astroparticle Physics, University of Nova Gorica, Nova Gorica, Slovenia
| | - B. D. Fox
- />University of Hawaii, Honolulu, HI USA
| | - O. Fratu
- />University Politehnica of Bucharest, Bucharest, Romania
| | | | - B. Fuchs
- />Karlsruhe Institute of Technology - Campus South - Institut für Experimentelle, Kernphysik (IEKP), Karlsruhe, Germany
| | - T. Fujii
- />Enrico Fermi Institute, University of Chicago, Chicago, IL USA
| | - R. Gaior
- />Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), Universités Paris 6 et Paris 7, CNRS-IN2P3, Paris, France
| | - B. García
- />Instituto de Tecnologías en Detección y Astropartículas (CNEA, CONICET, UNSAM) and National Technological University, Faculty Mendoza (CONICET/CNEA), Mendoza, Argentina
| | - S. T. Garcia Roca
- />Universidad de Santiago de Compostela, Santiago de Compostela, Spain
| | - D. Garcia-Gamez
- />Laboratoire de l’Accélérateur Linéaire (LAL), Université Paris 11, CNRS-IN2P3, Orsay, France
| | | | - G. Garilli
- />Università di Catania and Sezione INFN, Catania, Italy
| | | | - F. Gate
- />SUBATECH, École des Mines de Nantes, CNRS-IN2P3, Université de Nantes, Nantes, France
| | - H. Gemmeke
- />Karlsruhe Institute of Technology - Campus North - Institut für Prozessdatenverarbeitung und Elektronik, Karlsruhe, Germany
| | - P. L. Ghia
- />Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), Universités Paris 6 et Paris 7, CNRS-IN2P3, Paris, France
| | - U. Giaccari
- />Instituto de Física, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ Brazil
| | - M. Giammarchi
- />Università di Milano and Sezione INFN, Milan, Italy
| | | | - C. Glaser
- />RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany
| | | | - M. Gómez Berisso
- />Centro Atómico Bariloche and Instituto Balseiro (CNEA-UNCuyo-CONICET), San Carlos de Bariloche, Argentina
| | - P. F. Gómez Vitale
- />Observatorio Pierre Auger and Comisión Nacional de Energía Atómica, Malargüe, Argentina
| | - P. Gonçalves
- />Laboratório de Instrumentação e Física Experimental de Partículas - LIP and Instituto Superior Técnico - IST, Universidade de Lisboa - UL, Lisbon, Portugal
| | - J. G. Gonzalez
- />Karlsruhe Institute of Technology - Campus South - Institut für Experimentelle, Kernphysik (IEKP), Karlsruhe, Germany
| | - N. González
- />Instituto de Tecnologías en Detección y Astropartículas (CNEA, CONICET, UNSAM), Buenos Aires, Argentina
| | - B. Gookin
- />Colorado State University, Fort Collins, CO USA
| | - J. Gordon
- />Ohio State University, Columbus, OH USA
| | - A. Gorgi
- />Osservatorio Astrofisico di Torino (INAF), Università di Torino and Sezione INFN, Torino, Italy
| | - P. Gorham
- />University of Hawaii, Honolulu, HI USA
| | - P. Gouffon
- />Instituto de Física, Universidade de São Paulo, São Paulo, SP Brazil
| | - S. Grebe
- />IMAPP, Radboud University Nijmegen, Nijmegen, Netherlands
- />Nikhef, Science Park, Amsterdam, Netherlands
| | | | - A. F. Grillo
- />INFN, Laboratori Nazionali del Gran Sasso, Assergi, L’Aquila Italy
| | - T. D. Grubb
- />University of Adelaide, Adelaide, SA Australia
| | - F. Guarino
- />Università di Napoli “Federico II” and Sezione INFN, Napoli, Italy
| | - G. P. Guedes
- />Universidade Estadual de Feira de Santana, Feira de Santana, Brazil
| | - M. R. Hampel
- />Instituto de Tecnologías en Detección y Astropartículas (CNEA, CONICET, UNSAM), Buenos Aires, Argentina
| | - P. Hansen
- />IFLP, Universidad Nacional de La Plata and CONICET, La Plata, Argentina
| | - D. Harari
- />Centro Atómico Bariloche and Instituto Balseiro (CNEA-UNCuyo-CONICET), San Carlos de Bariloche, Argentina
| | | | - S. Hartmann
- />RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany
| | - J. L. Harton
- />Colorado State University, Fort Collins, CO USA
| | - A. Haungs
- />Karlsruhe Institute of Technology - Campus North - Institut für Kernphysik, Karlsruhe, Germany
| | - T. Hebbeker
- />RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany
| | - D. Heck
- />Karlsruhe Institute of Technology - Campus North - Institut für Kernphysik, Karlsruhe, Germany
| | | | - A. E. Herve
- />Karlsruhe Institute of Technology - Campus North - Institut für Kernphysik, Karlsruhe, Germany
| | - G. C. Hill
- />University of Adelaide, Adelaide, SA Australia
| | | | - N. Hollon
- />Enrico Fermi Institute, University of Chicago, Chicago, IL USA
| | - E. Holt
- />Karlsruhe Institute of Technology - Campus North - Institut für Kernphysik, Karlsruhe, Germany
| | - P. Homola
- />Bergische Universität Wuppertal, Wuppertal, Germany
| | - J. R. Hörandel
- />IMAPP, Radboud University Nijmegen, Nijmegen, Netherlands
- />Nikhef, Science Park, Amsterdam, Netherlands
| | - P. Horvath
- />Palacky University, RCPTM, Olomouc, Czech Republic
| | - M. Hrabovský
- />Institute of Physics of the Academy of Sciences of the Czech Republic, Prague, Czech Republic
- />Palacky University, RCPTM, Olomouc, Czech Republic
| | - D. Huber
- />Karlsruhe Institute of Technology - Campus South - Institut für Experimentelle, Kernphysik (IEKP), Karlsruhe, Germany
| | - T. Huege
- />Karlsruhe Institute of Technology - Campus North - Institut für Kernphysik, Karlsruhe, Germany
| | - A. Insolia
- />Università di Catania and Sezione INFN, Catania, Italy
| | - P. G. Isar
- />Institute of Space Sciences, Bucharest-Magurele, Romania
| | - I. Jandt
- />Bergische Universität Wuppertal, Wuppertal, Germany
| | - S. Jansen
- />IMAPP, Radboud University Nijmegen, Nijmegen, Netherlands
- />Nikhef, Science Park, Amsterdam, Netherlands
| | - C. Jarne
- />IFLP, Universidad Nacional de La Plata and CONICET, La Plata, Argentina
| | - M. Josebachuili
- />Instituto de Tecnologías en Detección y Astropartículas (CNEA, CONICET, UNSAM), Buenos Aires, Argentina
| | - A. Kääpä
- />Bergische Universität Wuppertal, Wuppertal, Germany
| | - O. Kambeitz
- />Karlsruhe Institute of Technology - Campus South - Institut für Experimentelle, Kernphysik (IEKP), Karlsruhe, Germany
| | - K. H. Kampert
- />Bergische Universität Wuppertal, Wuppertal, Germany
| | | | - I. Katkov
- />Karlsruhe Institute of Technology - Campus South - Institut für Experimentelle, Kernphysik (IEKP), Karlsruhe, Germany
| | - B. Kégl
- />Laboratoire de l’Accélérateur Linéaire (LAL), Université Paris 11, CNRS-IN2P3, Orsay, France
| | - B. Keilhauer
- />Karlsruhe Institute of Technology - Campus North - Institut für Kernphysik, Karlsruhe, Germany
| | - A. Keivani
- />Pennsylvania State University, University Park, PA USA
| | - E. Kemp
- />Universidade Estadual de Campinas, IFGW, Campinas, SP Brazil
| | | | - H. O. Klages
- />Karlsruhe Institute of Technology - Campus North - Institut für Kernphysik, Karlsruhe, Germany
| | - M. Kleifges
- />Karlsruhe Institute of Technology - Campus North - Institut für Prozessdatenverarbeitung und Elektronik, Karlsruhe, Germany
| | | | - R. Krause
- />RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany
| | - N. Krohm
- />Bergische Universität Wuppertal, Wuppertal, Germany
| | - O. Krömer
- />Karlsruhe Institute of Technology - Campus North - Institut für Prozessdatenverarbeitung und Elektronik, Karlsruhe, Germany
| | | | - D. Kuempel
- />RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany
| | - N. Kunka
- />Karlsruhe Institute of Technology - Campus North - Institut für Prozessdatenverarbeitung und Elektronik, Karlsruhe, Germany
| | - D. LaHurd
- />Case Western Reserve University, Cleveland, OH USA
| | - L. Latronico
- />Osservatorio Astrofisico di Torino (INAF), Università di Torino and Sezione INFN, Torino, Italy
| | - R. Lauer
- />University of New Mexico, Albuquerque, NM USA
| | - M. Lauscher
- />RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany
| | - P. Lautridou
- />SUBATECH, École des Mines de Nantes, CNRS-IN2P3, Université de Nantes, Nantes, France
| | - S. Le Coz
- />Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Grenoble-Alpes, CNRS/IN2P3, Grenoble, France
| | - M. S. A. B. Leão
- />Faculdade Independente do Nordeste, Vitória da Conquista, Brazil
| | - D. Lebrun
- />Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Grenoble-Alpes, CNRS/IN2P3, Grenoble, France
| | | | | | - A. Letessier-Selvon
- />Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), Universités Paris 6 et Paris 7, CNRS-IN2P3, Paris, France
| | - I. Lhenry-Yvon
- />Institut de Physique Nucléaire d’Orsay (IPNO), Université Paris 11, CNRS-IN2P3, Orsay, France
| | - K. Link
- />Karlsruhe Institute of Technology - Campus South - Institut für Experimentelle, Kernphysik (IEKP), Karlsruhe, Germany
| | - R. López
- />Benemérita Universidad Autónoma de Puebla, Puebla, Mexico
| | - A. Lopez Agüera
- />Universidad de Santiago de Compostela, Santiago de Compostela, Spain
| | - K. Louedec
- />Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Grenoble-Alpes, CNRS/IN2P3, Grenoble, France
| | | | - L. Lu
- />Bergische Universität Wuppertal, Wuppertal, Germany
- />School of Physics and Astronomy, University of Leeds, Leeds, UK
| | - A. Lucero
- />Instituto de Tecnologías en Detección y Astropartículas (CNEA, CONICET, UNSAM), Buenos Aires, Argentina
| | - M. Ludwig
- />Karlsruhe Institute of Technology - Campus South - Institut für Experimentelle, Kernphysik (IEKP), Karlsruhe, Germany
| | - M. Malacari
- />University of Adelaide, Adelaide, SA Australia
| | - S. Maldera
- />Osservatorio Astrofisico di Torino (INAF), Università di Torino and Sezione INFN, Torino, Italy
| | - M. Mallamaci
- />Università di Milano and Sezione INFN, Milan, Italy
| | - J. Maller
- />SUBATECH, École des Mines de Nantes, CNRS-IN2P3, Université de Nantes, Nantes, France
| | - D. Mandat
- />Institute of Physics of the Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | | | - A. G. Mariazzi
- />IFLP, Universidad Nacional de La Plata and CONICET, La Plata, Argentina
| | - V. Marin
- />SUBATECH, École des Mines de Nantes, CNRS-IN2P3, Université de Nantes, Nantes, France
| | - I. C. Mariş
- />Universidad de Granada and C.A.F.P.E., Granada, Spain
| | - G. Marsella
- />Dipartimento di Matematica e Fisica “E. De Giorgi” dell’Università del Salento and Sezione INFN, Lecce, Italy
| | - D. Martello
- />Dipartimento di Matematica e Fisica “E. De Giorgi” dell’Università del Salento and Sezione INFN, Lecce, Italy
| | - L. Martin
- />Station de Radioastronomie de Nançay, Observatoire de Paris, CNRS/INSU, Nançay, France
- />SUBATECH, École des Mines de Nantes, CNRS-IN2P3, Université de Nantes, Nantes, France
| | - H. Martinez
- />Centro de Investigación y de Estudios Avanzados del IPN (CINVESTAV), Mexico, Mexico
| | | | - D. Martraire
- />Institut de Physique Nucléaire d’Orsay (IPNO), Université Paris 11, CNRS-IN2P3, Orsay, France
| | - J. J. Masías Meza
- />Departamento de Física, FCEyN Universidad de Buenos Aires y CONICET, Buenos Aires, Argentina
| | - H. J. Mathes
- />Karlsruhe Institute of Technology - Campus North - Institut für Kernphysik, Karlsruhe, Germany
| | - S. Mathys
- />Bergische Universität Wuppertal, Wuppertal, Germany
| | - J. Matthews
- />Louisiana State University, Baton Rouge, LA USA
| | | | - G. Matthiae
- />Università di Roma II “Tor Vergata” and Sezione INFN, Roma, Italy
| | - D. Maurel
- />Karlsruhe Institute of Technology - Campus South - Institut für Experimentelle, Kernphysik (IEKP), Karlsruhe, Germany
| | - D. Maurizio
- />Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, RJ Brazil
| | - E. Mayotte
- />Colorado School of Mines, Golden, CO USA
| | | | - C. Medina
- />Colorado School of Mines, Golden, CO USA
| | - G. Medina-Tanco
- />Universidad Nacional Autonoma de Mexico, Mexico, D.F., Mexico
| | - R. Meissner
- />RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany
| | - M. Melissas
- />Karlsruhe Institute of Technology - Campus South - Institut für Experimentelle, Kernphysik (IEKP), Karlsruhe, Germany
| | - D. Melo
- />Instituto de Tecnologías en Detección y Astropartículas (CNEA, CONICET, UNSAM), Buenos Aires, Argentina
| | - A. Menshikov
- />Karlsruhe Institute of Technology - Campus North - Institut für Prozessdatenverarbeitung und Elektronik, Karlsruhe, Germany
| | - S. Messina
- />KVI - Center for Advanced Radiation Technology, University of Groningen, Groningen, Netherlands
| | | | - S. Mićanović
- />Rudjer Bošković Institute, 10000 Zagreb, Croatia
| | - M. I. Micheletti
- />Instituto de Física de Rosario (IFIR), CONICET/U.N.R. and Facultad de Ciencias Bioquímicas y Farmacéuticas U.N.R., Rosario, Argentina
| | - L. Middendorf
- />RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany
| | - I. A. Minaya
- />Universidad Complutense de Madrid, Madrid, Spain
| | - L. Miramonti
- />Università di Milano and Sezione INFN, Milan, Italy
| | - B. Mitrica
- />’Horia Hulubei’ National Institute for Physics and Nuclear Engineering, Bucharest-Magurele, Romania
| | | | - S. Mollerach
- />Centro Atómico Bariloche and Instituto Balseiro (CNEA-UNCuyo-CONICET), San Carlos de Bariloche, Argentina
| | - M. Monasor
- />Enrico Fermi Institute, University of Chicago, Chicago, IL USA
| | - D. Monnier Ragaigne
- />Laboratoire de l’Accélérateur Linéaire (LAL), Université Paris 11, CNRS-IN2P3, Orsay, France
| | - F. Montanet
- />Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Grenoble-Alpes, CNRS/IN2P3, Grenoble, France
| | - C. Morello
- />Osservatorio Astrofisico di Torino (INAF), Università di Torino and Sezione INFN, Torino, Italy
| | - M. Mostafá
- />Pennsylvania State University, University Park, PA USA
| | - C. A. Moura
- />Universidade Federal do ABC, Santo André, SP Brazil
| | - M. A. Muller
- />Universidade Estadual de Campinas, IFGW, Campinas, SP Brazil
- />Universidade Federal de Pelotas, Pelotas, RS Brazil
| | - G. Müller
- />RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany
| | - S. Müller
- />Karlsruhe Institute of Technology - Campus North - Institut für Kernphysik, Karlsruhe, Germany
| | - M. Münchmeyer
- />Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), Universités Paris 6 et Paris 7, CNRS-IN2P3, Paris, France
| | - R. Mussa
- />Università di Torino and Sezione INFN, Torino, Italy
| | - G. Navarra
- />Osservatorio Astrofisico di Torino (INAF), Università di Torino and Sezione INFN, Torino, Italy
| | - S. Navas
- />Universidad de Granada and C.A.F.P.E., Granada, Spain
| | - P. Necesal
- />Institute of Physics of the Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - L. Nellen
- />Universidad Nacional Autonoma de Mexico, Mexico, D.F., Mexico
| | - A. Nelles
- />IMAPP, Radboud University Nijmegen, Nijmegen, Netherlands
- />Nikhef, Science Park, Amsterdam, Netherlands
| | - J. Neuser
- />Bergische Universität Wuppertal, Wuppertal, Germany
| | - P. Nguyen
- />University of Adelaide, Adelaide, SA Australia
| | | | - L. Niemietz
- />Bergische Universität Wuppertal, Wuppertal, Germany
| | - T. Niggemann
- />RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany
| | - D. Nitz
- />Michigan Technological University, Houghton, MI USA
| | - D. Nosek
- />Faculty of Mathematics and Physics, Institute of Particle and Nuclear Physics, Charles University, Prague, Czech Republic
| | - V. Novotny
- />Faculty of Mathematics and Physics, Institute of Particle and Nuclear Physics, Charles University, Prague, Czech Republic
| | - L. Nožka
- />Palacky University, RCPTM, Olomouc, Czech Republic
| | - L. Ochilo
- />Universität Siegen, Siegen, Germany
| | - A. Olinto
- />Enrico Fermi Institute, University of Chicago, Chicago, IL USA
| | - M. Oliveira
- />Laboratório de Instrumentação e Física Experimental de Partículas - LIP and Instituto Superior Técnico - IST, Universidade de Lisboa - UL, Lisbon, Portugal
| | - N. Pacheco
- />Universidad de Alcalá, Alcalá de Henares, Madrid Spain
| | | | - M. Palatka
- />Institute of Physics of the Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - J. Pallotta
- />Centro de Investigaciones en Láseres y Aplicaciones, CITEDEF and CONICET, Villa Martelli, Buenos Aires, Argentina
| | - N. Palmieri
- />Karlsruhe Institute of Technology - Campus South - Institut für Experimentelle, Kernphysik (IEKP), Karlsruhe, Germany
| | - P. Papenbreer
- />Bergische Universität Wuppertal, Wuppertal, Germany
| | - G. Parente
- />Universidad de Santiago de Compostela, Santiago de Compostela, Spain
| | - A. Parra
- />Universidad de Santiago de Compostela, Santiago de Compostela, Spain
| | - T. Paul
- />Department of Physics and Astronomy, City University of New York, New York, USA
- />Northeastern University, Boston, MA USA
| | - M. Pech
- />Institute of Physics of the Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - J. Pȩkala
- />Institute of Nuclear Physics PAN, Krakow, Poland
| | - R. Pelayo
- />Benemérita Universidad Autónoma de Puebla, Puebla, Mexico
| | - I. M. Pepe
- />Universidade Federal da Bahia, Salvador, BA Brazil
| | - L. Perrone
- />Dipartimento di Matematica e Fisica “E. De Giorgi” dell’Università del Salento and Sezione INFN, Lecce, Italy
| | | | - C. Peters
- />RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany
| | - S. Petrera
- />Dipartimento di Scienze Fisiche e Chimiche dell’Università dell’Aquila and INFN, L’Aquila, Italy
- />Gran Sasso Science Institute (INFN), L’Aquila, Italy
| | - Y. Petrov
- />Colorado State University, Fort Collins, CO USA
| | - J. Phuntsok
- />Pennsylvania State University, University Park, PA USA
| | - R. Piegaia
- />Departamento de Física, FCEyN Universidad de Buenos Aires y CONICET, Buenos Aires, Argentina
| | - T. Pierog
- />Karlsruhe Institute of Technology - Campus North - Institut für Kernphysik, Karlsruhe, Germany
| | - P. Pieroni
- />Departamento de Física, FCEyN Universidad de Buenos Aires y CONICET, Buenos Aires, Argentina
| | - M. Pimenta
- />Laboratório de Instrumentação e Física Experimental de Partículas - LIP and Instituto Superior Técnico - IST, Universidade de Lisboa - UL, Lisbon, Portugal
| | - V. Pirronello
- />Università di Catania and Sezione INFN, Catania, Italy
| | - M. Platino
- />Instituto de Tecnologías en Detección y Astropartículas (CNEA, CONICET, UNSAM), Buenos Aires, Argentina
| | - M. Plum
- />RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany
| | - A. Porcelli
- />Karlsruhe Institute of Technology - Campus North - Institut für Kernphysik, Karlsruhe, Germany
| | - C. Porowski
- />Institute of Nuclear Physics PAN, Krakow, Poland
| | - R. R. Prado
- />Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos, SP Brazil
| | - P. Privitera
- />Enrico Fermi Institute, University of Chicago, Chicago, IL USA
| | - M. Prouza
- />Institute of Physics of the Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - V. Purrello
- />Centro Atómico Bariloche and Instituto Balseiro (CNEA-UNCuyo-CONICET), San Carlos de Bariloche, Argentina
| | - E. J. Quel
- />Centro de Investigaciones en Láseres y Aplicaciones, CITEDEF and CONICET, Villa Martelli, Buenos Aires, Argentina
| | - S. Querchfeld
- />Bergische Universität Wuppertal, Wuppertal, Germany
| | - S. Quinn
- />Case Western Reserve University, Cleveland, OH USA
| | - J. Rautenberg
- />Bergische Universität Wuppertal, Wuppertal, Germany
| | - O. Ravel
- />SUBATECH, École des Mines de Nantes, CNRS-IN2P3, Université de Nantes, Nantes, France
| | - D. Ravignani
- />Instituto de Tecnologías en Detección y Astropartículas (CNEA, CONICET, UNSAM), Buenos Aires, Argentina
| | - B. Revenu
- />SUBATECH, École des Mines de Nantes, CNRS-IN2P3, Université de Nantes, Nantes, France
| | - J. Ridky
- />Institute of Physics of the Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - S. Riggi
- />Istituto di Astrofisica Spaziale e Fisica Cosmica di Palermo (INAF), Palermo, Italy
- />Universidad de Santiago de Compostela, Santiago de Compostela, Spain
| | - M. Risse
- />Universität Siegen, Siegen, Germany
| | - P. Ristori
- />Centro de Investigaciones en Láseres y Aplicaciones, CITEDEF and CONICET, Villa Martelli, Buenos Aires, Argentina
| | - V. Rizi
- />Dipartimento di Scienze Fisiche e Chimiche dell’Università dell’Aquila and INFN, L’Aquila, Italy
| | | | - I. Rodriguez Cabo
- />Universidad de Santiago de Compostela, Santiago de Compostela, Spain
| | - G. Rodriguez Fernandez
- />Università di Roma II “Tor Vergata” and Sezione INFN, Roma, Italy
- />Universidad de Santiago de Compostela, Santiago de Compostela, Spain
| | | | | | - D. Rogozin
- />Karlsruhe Institute of Technology - Campus North - Institut für Kernphysik, Karlsruhe, Germany
| | - G. Ros
- />Universidad de Alcalá, Alcalá de Henares, Madrid Spain
| | - J. Rosado
- />Universidad Complutense de Madrid, Madrid, Spain
| | - T. Rossler
- />Palacky University, RCPTM, Olomouc, Czech Republic
| | - M. Roth
- />Karlsruhe Institute of Technology - Campus North - Institut für Kernphysik, Karlsruhe, Germany
| | - E. Roulet
- />Centro Atómico Bariloche and Instituto Balseiro (CNEA-UNCuyo-CONICET), San Carlos de Bariloche, Argentina
| | - A. C. Rovero
- />Instituto de Astronomía y Física del Espacio (CONICET-UBA), Buenos Aires, Argentina
| | - S. J. Saffi
- />University of Adelaide, Adelaide, SA Australia
| | - A. Saftoiu
- />’Horia Hulubei’ National Institute for Physics and Nuclear Engineering, Bucharest-Magurele, Romania
| | - F. Salamida
- />Institut de Physique Nucléaire d’Orsay (IPNO), Université Paris 11, CNRS-IN2P3, Orsay, France
| | - H. Salazar
- />Benemérita Universidad Autónoma de Puebla, Puebla, Mexico
| | - A. Saleh
- />Laboratory for Astroparticle Physics, University of Nova Gorica, Nova Gorica, Slovenia
| | | | - G. Salina
- />Università di Roma II “Tor Vergata” and Sezione INFN, Roma, Italy
| | - F. Sánchez
- />Instituto de Tecnologías en Detección y Astropartículas (CNEA, CONICET, UNSAM), Buenos Aires, Argentina
| | | | - C. E. Santo
- />Laboratório de Instrumentação e Física Experimental de Partículas - LIP and Instituto Superior Técnico - IST, Universidade de Lisboa - UL, Lisbon, Portugal
| | - E. Santos
- />Universidade Estadual de Campinas, IFGW, Campinas, SP Brazil
| | - E. M. Santos
- />Instituto de Física, Universidade de São Paulo, São Paulo, SP Brazil
| | - F. Sarazin
- />Colorado School of Mines, Golden, CO USA
| | - B. Sarkar
- />Bergische Universität Wuppertal, Wuppertal, Germany
| | - R. Sarmento
- />Laboratório de Instrumentação e Física Experimental de Partículas - LIP and Instituto Superior Técnico - IST, Universidade de Lisboa - UL, Lisbon, Portugal
| | - R. Sato
- />Observatorio Pierre Auger, Malargüe, Argentina
| | - N. Scharf
- />RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany
| | - V. Scherini
- />Dipartimento di Matematica e Fisica “E. De Giorgi” dell’Università del Salento and Sezione INFN, Lecce, Italy
| | - H. Schieler
- />Karlsruhe Institute of Technology - Campus North - Institut für Kernphysik, Karlsruhe, Germany
| | | | - D. Schmidt
- />Karlsruhe Institute of Technology - Campus North - Institut für Kernphysik, Karlsruhe, Germany
| | - F. G. Schröder
- />Karlsruhe Institute of Technology - Campus North - Institut für Kernphysik, Karlsruhe, Germany
| | - O. Scholten
- />KVI - Center for Advanced Radiation Technology, University of Groningen, Groningen, Netherlands
| | - H. Schoorlemmer
- />IMAPP, Radboud University Nijmegen, Nijmegen, Netherlands
- />Nikhef, Science Park, Amsterdam, Netherlands
- />University of Hawaii, Honolulu, HI USA
| | - P. Schovánek
- />Institute of Physics of the Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - A. Schulz
- />Karlsruhe Institute of Technology - Campus North - Institut für Kernphysik, Karlsruhe, Germany
| | - J. Schulz
- />IMAPP, Radboud University Nijmegen, Nijmegen, Netherlands
| | - J. Schumacher
- />RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany
| | - S. J. Sciutto
- />IFLP, Universidad Nacional de La Plata and CONICET, La Plata, Argentina
| | - A. Segreto
- />Istituto di Astrofisica Spaziale e Fisica Cosmica di Palermo (INAF), Palermo, Italy
| | - M. Settimo
- />Laboratoire de Physique Nucléaire et de Hautes Energies (LPNHE), Universités Paris 6 et Paris 7, CNRS-IN2P3, Paris, France
| | - A. Shadkam
- />Louisiana State University, Baton Rouge, LA USA
| | - R. C. Shellard
- />Centro Brasileiro de Pesquisas Fisicas, Rio de Janeiro, RJ Brazil
| | - I. Sidelnik
- />Centro Atómico Bariloche and Instituto Balseiro (CNEA-UNCuyo-CONICET), San Carlos de Bariloche, Argentina
| | - G. Sigl
- />Universität Hamburg, Hamburg, Germany
| | - O. Sima
- />Physics Department, University of Bucharest, Bucharest, Romania
| | | | - R. Šmída
- />Karlsruhe Institute of Technology - Campus North - Institut für Kernphysik, Karlsruhe, Germany
| | - G. R. Snow
- />University of Nebraska, Lincoln, NE USA
| | - P. Sommers
- />Pennsylvania State University, University Park, PA USA
| | - J. Sorokin
- />University of Adelaide, Adelaide, SA Australia
| | - R. Squartini
- />Observatorio Pierre Auger, Malargüe, Argentina
| | | | - S. Stanič
- />Laboratory for Astroparticle Physics, University of Nova Gorica, Nova Gorica, Slovenia
| | | | - J. Stasielak
- />Institute of Nuclear Physics PAN, Krakow, Poland
| | - M. Stephan
- />RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany
| | - A. Stutz
- />Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Grenoble-Alpes, CNRS/IN2P3, Grenoble, France
| | - F. Suarez
- />Instituto de Tecnologías en Detección y Astropartículas (CNEA, CONICET, UNSAM), Buenos Aires, Argentina
| | - T. Suomijärvi
- />Institut de Physique Nucléaire d’Orsay (IPNO), Université Paris 11, CNRS-IN2P3, Orsay, France
| | - A. D. Supanitsky
- />Instituto de Astronomía y Física del Espacio (CONICET-UBA), Buenos Aires, Argentina
| | | | - J. Swain
- />Northeastern University, Boston, MA USA
| | | | - M. Szuba
- />Karlsruhe Institute of Technology - Campus North - Institut für Kernphysik, Karlsruhe, Germany
| | - O. A. Taborda
- />Centro Atómico Bariloche and Instituto Balseiro (CNEA-UNCuyo-CONICET), San Carlos de Bariloche, Argentina
| | - A. Tapia
- />Instituto de Tecnologías en Detección y Astropartículas (CNEA, CONICET, UNSAM), Buenos Aires, Argentina
| | - M. Tartare
- />Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Grenoble-Alpes, CNRS/IN2P3, Grenoble, France
| | - A. Tepe
- />Universität Siegen, Siegen, Germany
| | - V. M. Theodoro
- />Universidade Estadual de Campinas, IFGW, Campinas, SP Brazil
| | - C. Timmermans
- />IMAPP, Radboud University Nijmegen, Nijmegen, Netherlands
- />Nikhef, Science Park, Amsterdam, Netherlands
| | | | - G. Toma
- />’Horia Hulubei’ National Institute for Physics and Nuclear Engineering, Bucharest-Magurele, Romania
| | - L. Tomankova
- />Karlsruhe Institute of Technology - Campus North - Institut für Kernphysik, Karlsruhe, Germany
| | - B. Tomé
- />Laboratório de Instrumentação e Física Experimental de Partículas - LIP and Instituto Superior Técnico - IST, Universidade de Lisboa - UL, Lisbon, Portugal
| | - A. Tonachini
- />Università di Torino and Sezione INFN, Torino, Italy
| | - G. Torralba Elipe
- />Universidad de Santiago de Compostela, Santiago de Compostela, Spain
| | - D. Torres Machado
- />Instituto de Física, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ Brazil
| | - P. Travnicek
- />Institute of Physics of the Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - E. Trovato
- />Università di Catania and Sezione INFN, Catania, Italy
| | - M. Tueros
- />Universidad de Santiago de Compostela, Santiago de Compostela, Spain
| | - R. Ulrich
- />Karlsruhe Institute of Technology - Campus North - Institut für Kernphysik, Karlsruhe, Germany
| | - M. Unger
- />Karlsruhe Institute of Technology - Campus North - Institut für Kernphysik, Karlsruhe, Germany
| | - M. Urban
- />RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany
| | | | - I. Valiño
- />Universidad de Santiago de Compostela, Santiago de Compostela, Spain
| | - L. Valore
- />Università di Napoli “Federico II” and Sezione INFN, Napoli, Italy
| | - G. van Aar
- />IMAPP, Radboud University Nijmegen, Nijmegen, Netherlands
| | | | - A. M. van den Berg
- />KVI - Center for Advanced Radiation Technology, University of Groningen, Groningen, Netherlands
| | - S. van Velzen
- />IMAPP, Radboud University Nijmegen, Nijmegen, Netherlands
| | | | - E. Varela
- />Benemérita Universidad Autónoma de Puebla, Puebla, Mexico
| | | | - G. Varner
- />University of Hawaii, Honolulu, HI USA
| | | | - R. A. Vázquez
- />Universidad de Santiago de Compostela, Santiago de Compostela, Spain
| | - D. Veberič
- />Laboratoire de l’Accélérateur Linéaire (LAL), Université Paris 11, CNRS-IN2P3, Orsay, France
| | - V. Verzi
- />Università di Roma II “Tor Vergata” and Sezione INFN, Roma, Italy
| | - J. Vicha
- />Institute of Physics of the Academy of Sciences of the Czech Republic, Prague, Czech Republic
| | - M. Videla
- />Instituto de Tecnologías en Detección y Astropartículas (CNEA, CONICET, UNSAM), Buenos Aires, Argentina
| | - L. Villaseñor
- />Universidad Michoacana de San Nicolas de Hidalgo, Morelia, Michoacan Mexico
| | - B. Vlcek
- />Universidad de Alcalá, Alcalá de Henares, Madrid Spain
| | - S. Vorobiov
- />Laboratory for Astroparticle Physics, University of Nova Gorica, Nova Gorica, Slovenia
| | - H. Wahlberg
- />IFLP, Universidad Nacional de La Plata and CONICET, La Plata, Argentina
| | - O. Wainberg
- />Instituto de Tecnologías en Detección y Astropartículas (CNEA, CONICET, UNSAM), Buenos Aires, Argentina
- />Universidad Tecnológica Nacional - Facultad Regional Buenos Aires, Buenos Aires, Argentina
| | - D. Walz
- />RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany
| | - A. A. Watson
- />School of Physics and Astronomy, University of Leeds, Leeds, UK
| | - M. Weber
- />Karlsruhe Institute of Technology - Campus North - Institut für Prozessdatenverarbeitung und Elektronik, Karlsruhe, Germany
| | - K. Weidenhaupt
- />RWTH Aachen University, III. Physikalisches Institut A, Aachen, Germany
| | - A. Weindl
- />Karlsruhe Institute of Technology - Campus North - Institut für Kernphysik, Karlsruhe, Germany
| | - F. Werner
- />Karlsruhe Institute of Technology - Campus South - Institut für Experimentelle, Kernphysik (IEKP), Karlsruhe, Germany
| | - A. Widom
- />Northeastern University, Boston, MA USA
| | - L. Wiencke
- />Colorado School of Mines, Golden, CO USA
| | | | | | - M. Will
- />Karlsruhe Institute of Technology - Campus North - Institut für Kernphysik, Karlsruhe, Germany
| | - C. Williams
- />Enrico Fermi Institute, University of Chicago, Chicago, IL USA
| | - T. Winchen
- />Bergische Universität Wuppertal, Wuppertal, Germany
| | - D. Wittkowski
- />Bergische Universität Wuppertal, Wuppertal, Germany
| | - B. Wundheiler
- />Instituto de Tecnologías en Detección y Astropartículas (CNEA, CONICET, UNSAM), Buenos Aires, Argentina
| | - S. Wykes
- />IMAPP, Radboud University Nijmegen, Nijmegen, Netherlands
| | - T. Yamamoto
- />Enrico Fermi Institute, University of Chicago, Chicago, IL USA
| | - T. Yapici
- />Michigan Technological University, Houghton, MI USA
| | - G. Yuan
- />Louisiana State University, Baton Rouge, LA USA
| | | | - B. Zamorano
- />Universidad de Granada and C.A.F.P.E., Granada, Spain
| | - E. Zas
- />Universidad de Santiago de Compostela, Santiago de Compostela, Spain
| | - D. Zavrtanik
- />Experimental Particle Physics Department, J. Stefan Institute, Ljubljana, Slovenia
- />Laboratory for Astroparticle Physics, University of Nova Gorica, Nova Gorica, Slovenia
| | - M. Zavrtanik
- />Experimental Particle Physics Department, J. Stefan Institute, Ljubljana, Slovenia
- />Laboratory for Astroparticle Physics, University of Nova Gorica, Nova Gorica, Slovenia
| | - I. Zaw
- />New York University, New York, NY USA
| | - A. Zepeda
- />Centro de Investigación y de Estudios Avanzados del IPN (CINVESTAV), Mexico, Mexico
| | - J. Zhou
- />Enrico Fermi Institute, University of Chicago, Chicago, IL USA
| | - Y. Zhu
- />Karlsruhe Institute of Technology - Campus North - Institut für Prozessdatenverarbeitung und Elektronik, Karlsruhe, Germany
| | | | | | - F. Zuccarello
- />Università di Catania and Sezione INFN, Catania, Italy
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Abreu P, Aglietta M, Ahn EJ, Albuquerque IFM, Allard D, Allekotte I, Allen J, Allison P, Almeda A, Alvarez Castillo J, Alvarez-Muñiz J, Ambrosio M, Aminaei A, Anchordoqui L, Andringa S, Antičić T, Aramo C, Arganda E, Arqueros F, Asorey H, Assis P, Aublin J, Ave M, Avenier M, Avila G, Bäcker T, Balzer M, Barber KB, Barbosa AF, Bardenet R, Barroso SLC, Baughman B, Bäuml J, Beatty JJ, Becker BR, Becker KH, Bellétoile A, Bellido JA, Benzvi S, Berat C, Bertou X, Biermann PL, Billoir P, Blanco F, Blanco M, Bleve C, Blümer H, Boháčová M, Boncioli D, Bonifazi C, Bonino R, Borodai N, Brack J, Brogueira P, Brown WC, Bruijn R, Buchholz P, Bueno A, Burton RE, Caballero-Mora KS, Caramete L, Caruso R, Castellina A, Catalano O, Cataldi G, Cazon L, Cester R, Chauvin J, Cheng SH, Chiavassa A, Chinellato JA, Chirinos Diaz J, Chudoba J, Clay RW, Coluccia MR, Conceição R, Contreras F, Cook H, Cooper MJ, Coppens J, Cordier A, Coutu S, Covault CE, Creusot A, Criss A, Cronin J, Curutiu A, Dagoret-Campagne S, Dallier R, Dasso S, Daumiller K, Dawson BR, de Almeida RM, De Domenico M, De Donato C, de Jong SJ, De La Vega G, de Mello Junior WJM, de Mello Neto JRT, De Mitri I, de Souza V, de Vries KD, Decerprit G, del Peral L, del Río M, Deligny O, Dembinski H, Dhital N, Di Giulio C, Díaz Castro ML, Diep PN, Dobrigkeit C, Docters W, D'Olivo JC, Dong PN, Dorofeev A, dos Anjos JC, Dova MT, D'Urso D, Dutan I, Ebr J, Engel R, Erdmann M, Escobar CO, Espadanal J, Etchegoyen A, Facal San Luis P, Fajardo Tapia I, Falcke H, Farrar G, Fauth AC, Fazzini N, Ferguson AP, Ferrero A, Fick B, Filevich A, Filipčič A, Fliescher S, Fracchiolla CE, Fraenkel ED, Fröhlich U, Fuchs B, Gaior R, Gamarra RF, Gambetta S, García B, Garcia-Gamez D, Garcia-Pinto D, Gascon A, Gemmeke H, Gesterling K, Ghia PL, Giaccari U, Giller M, Glass H, Gold MS, Golup G, Gomez Albarracin F, Gómez Berisso M, Gonçalves P, Gonzalez D, Gonzalez JG, Gookin B, Góra D, Gorgi A, Gouffon P, Gozzini SR, Grashorn E, Grebe S, Griffith N, Grigat M, Grillo AF, Guardincerri Y, Guarino F, Guedes GP, Guzman A, Hague JD, Hansen P, Harari D, Harmsma S, Harrison TA, Harton JL, Haungs A, Hebbeker T, Heck D, Herve AE, Hojvat C, Hollon N, Holmes VC, Homola P, Hörandel JR, Horneffer A, Horvath P, Hrabovský M, Huege T, Insolia A, Ionita F, Italiano A, Jarne C, Jiraskova S, Josebachuili M, Kadija K, Kampert KH, Karhan P, Kasper P, Kégl B, Keilhauer B, Keivani A, Kelley JL, Kemp E, Kieckhafer RM, Klages HO, Kleifges M, Kleinfeller J, Knapp J, Koang DH, Kotera K, Krohm N, Krömer O, Kruppke-Hansen D, Kuehn F, Kuempel D, Kulbartz JK, Kunka N, La Rosa G, Lachaud C, Lauer R, Lautridou P, Le Coz S, Leão MSAB, Lebrun D, Lebrun P, Leigui de Oliveira MA, Lemiere A, Letessier-Selvon A, Lhenry-Yvon I, Link K, López R, Lopez Agüera A, Louedec K, Lozano Bahilo J, Lu L, Lucero A, Ludwig M, Lyberis H, Macolino C, Maldera S, Mandat D, Mantsch P, Mariazzi AG, Marin J, Marin V, Maris IC, Marquez Falcon HR, Marsella G, Martello D, Martin L, Martinez H, Martínez Bravo O, Mathes HJ, Matthews J, Matthews JAJ, Matthiae G, Maurizio D, Mazur PO, Medina-Tanco G, Melissas M, Melo D, Menichetti E, Menshikov A, Mertsch P, Meurer C, Mićanović S, Micheletti MI, Miller W, Miramonti L, Molina-Bueno L, Mollerach S, Monasor M, Monnier Ragaigne D, Montanet F, Morales B, Morello C, Moreno E, Moreno JC, Morris C, Mostafá M, Moura CA, Mueller S, Muller MA, Müller G, Münchmeyer M, Mussa R, Navarra G, Navarro JL, Navas S, Necesal P, Nellen L, Nelles A, Neuser J, Nhung PT, Niemietz L, Nierstenhoefer N, Nitz D, Nosek D, Nožka L, Nyklicek M, Oehlschläger J, Olinto A, Olmos-Gilbaja VM, Ortiz M, Pacheco N, Pakk Selmi-Dei D, Palatka M, Pallotta J, Palmieri N, Parente G, Parizot E, Parra A, Parsons RD, Pastor S, Paul T, Pech M, Pekala J, Pelayo R, Pepe IM, Perrone L, Pesce R, Petermann E, Petrera S, Petrinca P, Petrolini A, Petrov Y, Petrovic J, Pfendner C, Phan N, Piegaia R, Pierog T, Pieroni P, Pimenta M, Pirronello V, Platino M, Ponce VH, Pontz M, Privitera P, Prouza M, Quel EJ, Querchfeld S, Rautenberg J, Ravel O, Ravignani D, Revenu B, Ridky J, Riggi S, Risse M, Ristori P, Rivera H, Rizi V, Roberts J, Robledo C, Rodrigues de Carvalho W, Rodriguez G, Rodriguez Martino J, Rodriguez Rojo J, Rodriguez-Cabo I, Rodríguez-Frías MD, Ros G, Rosado J, Rossler T, Roth M, Rouillé-d'Orfeuil B, Roulet E, Rovero AC, Rühle C, Salamida F, Salazar H, Salesa Greus F, Salina G, Sánchez F, Santo CE, Santos E, Santos EM, Sarazin F, Sarkar B, Sarkar S, Sato R, Scharf N, Scherini V, Schieler H, Schiffer P, Schmidt A, Scholten O, Schoorlemmer H, Schovancova J, Schovánek P, Schröder F, Schulte S, Schuster D, Sciutto SJ, Scuderi M, Segreto A, Settimo M, Shadkam A, Shellard RC, Sidelnik I, Sigl G, Silva Lopez HH, Smiałkowski A, Smída R, Snow GR, Sommers P, Sorokin J, Spinka H, Squartini R, Stanic S, Stapleton J, Stasielak J, Stephan M, Stutz A, Suarez F, Suomijärvi T, Supanitsky AD, Suša T, Sutherland MS, Swain J, Szadkowski Z, Szuba M, Tamashiro A, Tapia A, Tartare M, Taşcău O, Tavera Ruiz CG, Tcaciuc R, Tegolo D, Thao NT, Thomas D, Tiffenberg J, Timmermans C, Tiwari DK, Tkaczyk W, Todero Peixoto CJ, Tomé B, Tonachini A, Travnicek P, Tridapalli DB, Tristram G, Trovato E, Tueros M, Ulrich R, Unger M, Urban M, Valdés Galicia JF, Valiño I, Valore L, van den Berg AM, Varela E, Vargas Cárdenas B, Vázquez JR, Vázquez RA, Veberič D, Verzi V, Vicha J, Videla M, Villaseñor L, Wahlberg H, Wahrlich P, Wainberg O, Walz D, Warner D, Watson AA, Weber M, Weidenhaupt K, Weindl A, Westerhoff S, Whelan BJ, Wieczorek G, Wiencke L, Wilczyńska B, Wilczyński H, Will M, Williams C, Winchen T, Winnick MG, Wommer M, Wundheiler B, Yamamoto T, Yapici T, Younk P, Yuan G, Yushkov A, Zamorano B, Zas E, Zavrtanik D, Zavrtanik M, Zaw I, Zepeda A, Zhu Y, Zimbres Silva M, Ziolkowski M. Measurement of the proton-air cross section at √s=57 TeV with the Pierre Auger Observatory. Phys Rev Lett 2012; 109:062002. [PMID: 23006259 DOI: 10.1103/physrevlett.109.062002] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2011] [Indexed: 06/01/2023]
Abstract
We report a measurement of the proton-air cross section for particle production at the center-of-mass energy per nucleon of 57 TeV. This is derived from the distribution of the depths of shower maxima observed with the Pierre Auger Observatory: systematic uncertainties are studied in detail. Analyzing the tail of the distribution of the shower maxima, a proton-air cross section of [505±22(stat)(-36)(+28)(syst)] mb is found.
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Affiliation(s)
- P Abreu
- LIP and Instituto Superior Técnico, Technical University of Lisbon, Lisbon, Portugal
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Goff WL, Bastos RG, Brown WC, Johnson WC, Schneider DA. The bovine spleen: interactions among splenic cell populations in the innate immunologic control of hemoparasitic infections. Vet Immunol Immunopathol 2010; 138:1-14. [PMID: 20692048 DOI: 10.1016/j.vetimm.2010.07.006] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2010] [Revised: 07/08/2010] [Accepted: 07/12/2010] [Indexed: 11/17/2022]
Abstract
Over the past several years, innate immunity has been recognized as having an important role as a front-line defense mechanism and as an integral part of the adaptive immune response. Innate immunity in cattle exposed to hemoparasites is spleen-dependent and age-related. In this review, we discuss general aspects of innate immunity and the cells involved in this aspect of the response to infection. We also provide examples of specific splenic regulatory and effector mechanisms involved in the response to Babesia bovis, an important tick-borne hemoparasitic disease of cattle. Evidence for the regulatory and effector role of bovine splenic monocytes and DC both in directing a type-1 response through interaction with splenic NK cells and γδT-cells will be presented.
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Affiliation(s)
- W L Goff
- Animal Disease Research Unit, USDA-ARS, 3003 ADBF/WSU, Pullman, WA 99164-6630, USA
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6
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Abraham J, Abreu P, Aglietta M, Ahn EJ, Allard D, Allekotte I, Allen J, Alvarez-Muñiz J, Ambrosio M, Anchordoqui L, Andringa S, Anticić T, Anzalone A, Aramo C, Arganda E, Arisaka K, Arqueros F, Asorey H, Assis P, Aublin J, Ave M, Avila G, Bäcker T, Badagnani D, Balzer M, Barber KB, Barbosa AF, Barroso SLC, Baughman B, Bauleo P, Beatty JJ, Becker BR, Becker KH, Bellétoile A, Bellido JA, Benzvi S, Berat C, Bergmann T, Bertou X, Biermann PL, Billoir P, Blanch-Bigas O, Blanco F, Blanco M, Bleve C, Blümer H, Bohácová M, Boncioli D, Bonifazi C, Bonino R, Borodai N, Brack J, Brogueira P, Brown WC, Bruijn R, Buchholz P, Bueno A, Burton RE, Busca NG, Caballero-Mora KS, Caramete L, Caruso R, Castellina A, Catalano O, Cataldi G, Cazon L, Cester R, Chauvin J, Chiavassa A, Chinellato JA, Chou A, Chudoba J, Clay RW, Colombo E, Coluccia MR, Conceição R, Contreras F, Cook H, Cooper MJ, Coppens J, Cordier A, Cotti U, Coutu S, Covault CE, Creusot A, Criss A, Cronin J, Curutiu A, Dagoret-Campagne S, Dallier R, Daumiller K, Dawson BR, de Almeida RM, De Domenico M, De Donato C, de Jong SJ, De La Vega G, de Mello Junior WJM, de Mello Neto JRT, De Mitri I, de Souza V, de Vries KD, Decerprit G, Del Peral L, Deligny O, Della Selva A, Delle Fratte C, Dembinski H, Di Giulio C, Diaz JC, Díaz Castro ML, Diep PN, Dobrigkeit C, D'Olivo JC, Dong PN, Dorofeev A, Dos Anjos JC, Dova MT, D'Urso D, Dutan I, Duvernois MA, Ebr J, Engel R, Erdmann M, Escobar CO, Etchegoyen A, Facal San Luis P, Falcke H, Farrar G, Fauth AC, Fazzini N, Ferrero A, Fick B, Filevich A, Filipcic A, Fleck I, Fliescher S, Fracchiolla CE, Fraenkel ED, Fröhlich U, Fulgione W, Gamarra RF, Gambetta S, García B, García Gámez D, Garcia-Pinto D, Garrido X, Gelmini G, Gemmeke H, Ghia PL, Giaccari U, Giller M, Glass H, Goggin LM, Gold MS, Golup G, Gomez Albarracin F, Gómez Berisso M, Gonçalves P, Gonzalez D, Gonzalez JG, Góra D, Gorgi A, Gouffon P, Gozzini SR, Grashorn E, Grebe S, Grigat M, Grillo AF, Guardincerri Y, Guarino F, Guedes GP, Hague JD, Halenka V, Hansen P, Harari D, Harmsma S, Harton JL, Haungs A, Hebbeker T, Heck D, Herve AE, Hojvat C, Holmes VC, Homola P, Hörandel JR, Horneffer A, Hrabovský M, Huege T, Hussain M, Iarlori M, Insolia A, Ionita F, Italiano A, Jiraskova S, Kadija K, Kaducak M, Kampert KH, Karova T, Kasper P, Kégl B, Keilhauer B, Keivani A, Kelley J, Kemp E, Kieckhafer RM, Klages HO, Kleifges M, Kleinfeller J, Knapik R, Knapp J, Koang DH, Krieger A, Krömer O, Kruppke-Hansen D, Kuehn F, Kuempel D, Kulbartz K, Kunka N, Kusenko A, La Rosa G, Lachaud C, Lago BL, Lautridou P, Leão MSAB, Lebrun D, Lebrun P, Lee J, Leigui de Oliveira MA, Lemiere A, Letessier-Selvon A, Lhenry-Yvon I, López R, Lopez Agüera A, Louedec K, Lozano Bahilo J, Lucero A, Ludwig M, Lyberis H, Maccarone MC, Macolino C, Maldera S, Mandat D, Mantsch P, Mariazzi AG, Marin V, Maris IC, Marquez Falcon HR, Marsella G, Martello D, Martínez Bravo O, Mathes HJ, Matthews J, Matthews JAJ, Matthiae G, Maurizio D, Mazur PO, McEwen M, Medina-Tanco G, Melissas M, Melo D, Menichetti E, Menshikov A, Meurer C, Micanović S, Micheletti MI, Miller W, Miramonti L, Mollerach S, Monasor M, Monnier Ragaigne D, Montanet F, Morales B, Morello C, Moreno E, Moreno JC, Morris C, Mostafá M, Mueller S, Muller MA, Mussa R, Navarra G, Navarro JL, Navas S, Necesal P, Nellen L, Nhung PT, Nierstenhoefer N, Nitz D, Nosek D, Nozka L, Nyklicek M, Oehlschläger J, Olinto A, Oliva P, Olmos-Gilbaja VM, Ortiz M, Pacheco N, Pakk Selmi-Dei D, Palatka M, Pallotta J, Palmieri N, Parente G, Parizot E, Parlati S, Parra A, Parrisius J, Parsons RD, Pastor S, Paul T, Pavlidou V, Payet K, Pech M, Pekala J, Pelayo R, Pepe IM, Perrone L, Pesce R, Petermann E, Petrera S, Petrinca P, Petrolini A, Petrov Y, Petrovic J, Pfendner C, Piegaia R, Pierog T, Pimenta M, Pirronello V, Platino M, Ponce VH, Pontz M, Privitera P, Prouza M, Quel EJ, Rautenberg J, Ravel O, Ravignani D, Redondo A, Revenu B, Rezende FAS, Ridky J, Riggi S, Risse M, Ristori P, Rivière C, Rizi V, Robledo C, Rodriguez G, Rodriguez Martino J, Rodriguez Rojo J, Rodriguez-Cabo I, Rodríguez-Frías MD, Ros G, Rosado J, Rossler T, Roth M, Rouillé-d'Orfeuil B, Roulet E, Rovero AC, Salamida F, Salazar H, Salina G, Sánchez F, Santander M, Santo CE, Santos E, Santos EM, Sarazin F, Sarkar S, Sato R, Scharf N, Scherini V, Schieler H, Schiffer P, Schmidt A, Schmidt F, Schmidt T, Scholten O, Schoorlemmer H, Schovancova J, Schovánek P, Schroeder F, Schulte S, Schüssler F, Schuster D, Sciutto SJ, Scuderi M, Segreto A, Semikoz D, Settimo M, Shadkam A, Shellard RC, Sidelnik I, Siffert BB, Sigl G, Smiałkowski A, Smída R, Snow GR, Sommers P, Sorokin J, Spinka H, Squartini R, Stasielak J, Stephan M, Strazzeri E, Stutz A, Suarez F, Suomijärvi T, Supanitsky AD, Susa T, Sutherland MS, Swain J, Szadkowski Z, Tamashiro A, Tamburro A, Tapia A, Tarutina T, Taşcău O, Tcaciuc R, Tcherniakhovski D, Tegolo D, Thao NT, Thomas D, Tiffenberg J, Timmermans C, Tkaczyk W, Todero Peixoto CJ, Tomé B, Tonachini A, Travnicek P, Tridapalli DB, Tristram G, Trovato E, Tueros M, Ulrich R, Unger M, Urban M, Valdés Galicia JF, Valiño I, Valore L, van den Berg AM, Vázquez JR, Vázquez RA, Veberic D, Venters T, Verzi V, Videla M, Villaseñor L, Vorobiov S, Voyvodic L, Wahlberg H, Wahrlich P, Wainberg O, Warner D, Watson AA, Westerhoff S, Whelan BJ, Wieczorek G, Wiencke L, Wilczyńska B, Wilczyński H, Williams C, Winchen T, Winnick MG, Wundheiler B, Yamamoto T, Younk P, Yuan G, Yushkov A, Zas E, Zavrtanik D, Zavrtanik M, Zaw I, Zepeda A, Ziolkowski M. Measurement of the depth of maximum of extensive air showers above 10{18} eV. Phys Rev Lett 2010; 104:091101. [PMID: 20366976 DOI: 10.1103/physrevlett.104.091101] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2009] [Indexed: 05/29/2023]
Abstract
We describe the measurement of the depth of maximum, X{max}, of the longitudinal development of air showers induced by cosmic rays. Almost 4000 events above 10;{18} eV observed by the fluorescence detector of the Pierre Auger Observatory in coincidence with at least one surface detector station are selected for the analysis. The average shower maximum was found to evolve with energy at a rate of (106{-21}{+35}) g/cm{2}/decade below 10{18.24+/-0.05} eV, and (24+/-3) g/cm{2}/decade above this energy. The measured shower-to-shower fluctuations decrease from about 55 to 26 g/cm{2}. The interpretation of these results in terms of the cosmic ray mass composition is briefly discussed.
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Affiliation(s)
- J Abraham
- National Technological University, Faculty Mendoza (CONICET/CNEA), Mendoza, Argentina
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Howard CJ, Morrison WI, Brown WC, Naessens J, Sopp P. Demonstration of two allelic forms of the bovine T cell antigen Bo5 (CD5) and studies of their inheritance. Anim Genet 2009; 20:351-9. [PMID: 2515774 DOI: 10.1111/j.1365-2052.1989.tb00891.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Two monoclonal antibodies (mAbs), CC17 and IL-A67, which are specific for the bovine equivalent of the CD5 antigen, Bo5, were each found to react with the cells of some animals but not others. The cattle tested were all positive for one or both of the mAbs, but the level of expression on cells expressing both determinants was slightly lower than that on cells expressing either of the determinants on their own. Both mAbs precipitated an antigen of 67 kD. However, sequential immunoprecipitation experiments with cells that reacted with both mAbs demonstrated that the determinants are present on two different sets of molecules. These findings suggested that the mAbs recognize two co-dominantly expressed allelic forms of Bo5. This was confirmed in family studies, with groups of full- and half-sibling offspring of sires and dams of defined phenotypes. These experiments also showed that the gene encoding the Bo5 antigen is not linked to the major histocompatibility complex (MHC). The frequencies of the two alleles, which have been designated Bo5.1 and Bo5.2, in the cattle populations tested were 100% and 0%, respectively, in Bos taurus, and 10% and 90%, respectively, in Bos indicus.
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Affiliation(s)
- C J Howard
- AFRC Institute for Animal Health, Compton Laboratory, Newbury, Berkshire, UK
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Chen C, Bouman TJ, Beare PA, Mertens K, Zhang GQ, Russell-Lodrigue KE, Hogaboam JP, Peters B, Felgner PL, Brown WC, Heinzen RA, Hendrix LR, Samuel JE. A systematic approach to evaluate humoral and cellular immune responses to Coxiella burnetii immunoreactive antigens. Clin Microbiol Infect 2009; 15 Suppl 2:156-7. [PMID: 19281461 DOI: 10.1111/j.1469-0691.2008.02206.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- C Chen
- Department of Microbial and Molecular Pathogenesis, Texas A&M Health Science Center, College Station, TX 77843-1114, USA
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Abraham J, Abreu P, Aglietta M, Aguirre C, Allard D, Allekotte I, Allen J, Allison P, Alvarez-Muñiz J, Ambrosio M, Anchordoqui L, Andringa S, Anzalone A, Aramo C, Argirò S, Arisaka K, Armengaud E, Arneodo F, Arqueros F, Asch T, Asorey H, Assis P, Atulugama BS, Aublin J, Ave M, Avila G, Bäcker T, Badagnani D, Barbosa AF, Barnhill D, Barroso SLC, Baughman B, Bauleo P, Beatty JJ, Beau T, Becker BR, Becker KH, Bellido JA, Benzvi S, Berat C, Bergmann T, Bernardini P, Bertou X, Biermann PL, Billoir P, Blanch-Bigas O, Blanco F, Blasi P, Bleve C, Blümer H, Bohácová M, Bonifazi C, Bonino R, Brack J, Brogueira P, Brown WC, Buchholz P, Bueno A, Burton RE, Busca NG, Caballero-Mora KS, Cai B, Camin DV, Caramete L, Caruso R, Carvalho W, Castellina A, Catalano O, Cataldi G, Cazon L, Cester R, Chauvin J, Chiavassa A, Chinellato JA, Chou A, Chudoba J, Chye J, Clark PDJ, Clay RW, Colombo E, Conceição R, Connolly B, Contreras F, Coppens J, Cordier A, Cotti U, Coutu S, Covault CE, Creusot A, Criss A, Cronin J, Curutiu A, Dagoret-Campagne S, Daumiller K, Dawson BR, de Almeida RM, De Donato C, de Jong SJ, De La Vega G, Junior WJMDM, Neto JRTDM, De Mitri I, de Souza V, Del Peral L, Deligny O, Della Selva A, Fratte CD, Dembinski H, Di Giulio C, Diaz JC, Diep PN, Dobrigkeit C, D'Olivo JC, Dong PN, Dornic D, Dorofeev A, Dos Anjos JC, Dova MT, D'Urso D, Dutan I, Duvernois MA, Engel R, Epele L, Erdmann M, Escobar CO, Etchegoyen A, Luis PFS, Falcke H, Farrar G, Fauth AC, Fazzini N, Ferrer F, Ferrero A, Fick B, Filevich A, Filipcic A, Fleck I, Fracchiolla CE, Fulgione W, García B, Gámez DG, Garcia-Pinto D, Garrido X, Geenen H, Gelmini G, Gemmeke H, Ghia PL, Giller M, Glass H, Gold MS, Golup G, Albarracin FG, Berisso MG, Gonçalves P, do Amaral MG, Gonzalez D, Gonzalez JG, González M, Góra D, Gorgi A, Gouffon P, Grassi V, Grillo AF, Grunfeld C, Guardincerri Y, Guarino F, Guedes GP, Gutiérrez J, Hague JD, Halenka V, Hamilton JC, Hansen P, Harari D, Harmsma S, Harton JL, Haungs A, Hauschildt T, Healy MD, Hebbeker T, Hebrero G, Heck D, Hojvat C, Holmes VC, Homola P, Hörandel JR, Horneffer A, Hrabovský M, Huege T, Hussain M, Iarlori M, Insolia A, Ionita F, Italiano A, Kaducak M, Kampert KH, Karova T, Kasper P, Kégl B, Keilhauer B, Kemp E, Kieckhafer RM, Klages HO, Kleifges M, Kleinfeller J, Knapik R, Knapp J, Koang DH, Krieger A, Krömer O, Kuempel D, Kunka N, Kusenko A, La Rosa G, Lachaud C, Lago BL, Lebrun D, Lebrun P, Lee J, de Oliveira MAL, Letessier-Selvon A, Leuthold M, Lhenry-Yvon I, López R, Agüera AL, Bahilo JL, Lucero A, García RL, Maccarone MC, Macolino C, Maldera S, Mancarella G, Manceñido ME, Mandat D, Mantsch P, Mariazzi AG, Maris IC, Falcon HRM, Martello D, Martínez J, Bravo OM, Mathes HJ, Matthews J, Matthews JAJ, Matthiae G, Maurizio D, Mazur PO, McCauley T, McEwen M, McNeil RR, Medina MC, Medina-Tanco G, Melo D, Menichetti E, Menschikov A, Meurer C, Meyhandan R, Micheletti MI, Miele G, Miller W, Mollerach S, Monasor M, Ragaigne DM, Montanet F, Morales B, Morello C, Moreno JC, Morris C, Mostafá M, Muller MA, Mussa R, Navarra G, Navarro JL, Navas S, Necesal P, Nellen L, Newman-Holmes C, Newton D, Nhung PT, Nierstenhoefer N, Nitz D, Nosek D, Nozka L, Oehlschläger J, Ohnuki T, Olinto A, Olmos-Gilbaja VM, Ortiz M, Ortolani F, Ostapchenko S, Otero L, Pacheco N, Selmi-Dei DP, Palatka M, Pallotta J, Parente G, Parizot E, Parlati S, Pastor S, Patel M, Paul T, Pavlidou V, Payet K, Pech M, Pekala J, Pelayo R, Pepe IM, Perrone L, Pesce R, Petrera S, Petrinca P, Petrov Y, Pichel A, Piegaia R, Pierog T, Pimenta M, Pinto T, Pirronello V, Pisanti O, Platino M, Pochon J, Privitera P, Prouza M, Quel EJ, Rautenberg J, Redondo A, Reucroft S, Revenu B, Rezende FAS, Ridky J, Riggi S, Risse M, Rivière C, Rizi V, Roberts M, Robledo C, Rodriguez G, Martino JR, Rojo JR, Rodriguez-Cabo I, Rodríguez-Frías MD, Ros G, Rosado J, Roth M, Rouillé-d'Orfeuil B, Roulet E, Rovero AC, Salamida F, Salazar H, Salina G, Sánchez F, Santander M, Santo CE, Santos EM, Sarazin F, Sarkar S, Sato R, Scherini V, Schieler H, Schmidt A, Schmidt F, Schmidt T, Scholten O, Schovánek P, Schroeder F, Schulte S, Schüssler F, Sciutto SJ, Scuderi M, Segreto A, Semikoz D, Settimo M, Shellard RC, Sidelnik I, Siffert BB, Sigl G, Grande NSD, Smiałkowski A, Smída R, Smith AGK, Smith BE, Snow GR, Sokolsky P, Sommers P, Sorokin J, Spinka H, Squartini R, Strazzeri E, Stutz A, Suarez F, Suomijärvi T, Supanitsky AD, Sutherland MS, Swain J, Szadkowski Z, Takahashi J, Tamashiro A, Tamburro A, Tarutina T, Taşcău O, Tcaciuc R, Thao NT, Thomas D, Ticona R, Tiffenberg J, Timmermans C, Tkaczyk W, Peixoto CJT, Tomé B, Tonachini A, Torres I, Travnicek P, Tripathi A, Tristram G, Tscherniakhovski D, Tuci V, Tueros M, Tunnicliffe V, Ulrich R, Unger M, Urban M, Galicia JFV, Valiño I, Valore L, van den Berg AM, van Elewyck V, Vázquez RA, Veberic D, Veiga A, Velarde A, Venters T, Verzi V, Videla M, Villaseñor L, Vorobiov S, Voyvodic L, Wahlberg H, Wahrlich P, Wainberg O, Walker P, Warner D, Watson AA, Westerhoff S, Wieczorek G, Wiencke L, Wilczyńska B, Wilczyński H, Wileman C, Winnick MG, Wu H, Wundheiler B, Yamamoto T, Younk P, Zas E, Zavrtanik D, Zavrtanik M, Zaw I, Zepeda A, Ziolkowski M. Observation of the suppression of the flux of cosmic rays above 4 x 10 (19) eV. Phys Rev Lett 2008; 101:061101. [PMID: 18764444 DOI: 10.1103/physrevlett.101.061101] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2008] [Indexed: 05/26/2023]
Abstract
The energy spectrum of cosmic rays above 2.5 x 10;{18} eV, derived from 20,000 events recorded at the Pierre Auger Observatory, is described. The spectral index gamma of the particle flux, J proportional, variantE;{-gamma}, at energies between 4 x 10;{18} eV and 4 x 10;{19} eV is 2.69+/-0.02(stat)+/-0.06(syst), steepening to 4.2+/-0.4(stat)+/-0.06(syst) at higher energies. The hypothesis of a single power law is rejected with a significance greater than 6 standard deviations. The data are consistent with the prediction by Greisen and by Zatsepin and Kuz'min.
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Affiliation(s)
- J Abraham
- Universidad Tecnológica Nacional, FR-Mendoza, Argentina
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Abraham J, Abreu P, Aglietta M, Aguirre C, Allard D, Allekotte I, Allen J, Allison P, Alvarez-Muñiz J, Ambrosio M, Anchordoqui L, Andringa S, Anzalone A, Aramo C, Argirò S, Arisaka K, Armengaud E, Arneodo F, Arqueros F, Asch T, Asorey H, Assis P, Atulugama BS, Aublin J, Ave M, Avila G, Bäcker T, Badagnani D, Barbosa AF, Barnhill D, Barroso SLC, Bauleo P, Beatty JJ, Beau T, Becker BR, Becker KH, Bellido JA, BenZvi S, Berat C, Bergmann T, Bernardini P, Bertou X, Biermann PL, Billoir P, Blanch-Bigas O, Blanco F, Blasi P, Bleve C, Blümer H, Bohácová M, Bonifazi C, Bonino R, Boratav M, Brack J, Brogueira P, Brown WC, Buchholz P, Bueno A, Burton RE, Busca NG, Caballero-Mora KS, Cai B, Camin DV, Caramete L, Caruso R, Carvalho W, Castellina A, Catalano O, Cataldi G, Cazon L, Cester R, Chauvin J, Chiavassa A, Chinellato JA, Chou A, Chye J, Clark PDJ, Clay RW, Colombo E, Conceição R, Connolly B, Contreras F, Coppens J, Cordier A, Cotti U, Coutu S, Covault CE, Creusot A, Criss A, Cronin J, Curutiu A, Dagoret-Campagne S, Daumiller K, Dawson BR, de Almeida RM, De Donato C, de Jong SJ, De La Vega G, de Mello Junior WJM, de Mello Neto JRT, DeMitri I, de Souza V, del Peral L, Deligny O, Della Selva A, Delle Fratte C, Dembinski H, Di Giulio C, Diaz JC, Dobrigkeit C, D'Olivo JC, Dornic D, Dorofeev A, dos Anjos JC, Dova MT, D'Urso D, Dutan I, DuVernois MA, Engel R, Epele L, Erdmann M, Escobar CO, Etchegoyen A, Facal San Luis P, Falcke H, Farrar G, Fauth AC, Fazzini N, Ferrer F, Ferry S, Fick B, Filevich A, Filipcic A, Fleck I, Fonte R, Fracchiolla CE, Fulgione W, García B, García Gámez D, Garcia-Pinto D, Garrido X, Geenen H, Gelmini G, Gemmeke H, Ghia PL, Giller M, Glass H, Gold MS, Golup G, Gomez Albarracin F, Gómez Berisso M, Gómez Herrero R, Gonçalves P, Gonçalves do Amaral M, Gonzalez D, Gonzalez JG, González M, Góra D, Gorgi A, Gouffon P, Grassi V, Grillo AF, Grunfeld C, Guardincerri Y, Guarino F, Guedes GP, Gutiérrez J, Hague JD, Hamilton JC, Hansen P, Harari D, Harmsma S, Harton JL, Haungs A, Hauschildt T, Healy MD, Hebbeker T, Hebrero G, Heck D, Hojvat C, Holmes VC, Homola P, Hörandel J, Horneffer A, Horvat M, Hrabovský M, Huege T, Hussain M, Iarlori M, Insolia A, Ionita F, Italiano A, Kaducak M, Kampert KH, Karova T, Kégl B, Keilhauer B, Kemp E, Kieckhafer RM, Klages HO, Kleifges M, Kleinfeller J, Knapik R, Knapp J, Koang DH, Krieger A, Krömer O, Kuempel D, Kunka N, Kusenko A, La Rosa G, Lachaud C, Lago BL, Lebrun D, Lebrun P, Lee J, Leigui de Oliveira MA, Letessier-Selvon A, Leuthold M, Lhenry-Yvon I, López R, Lopez Agüera A, Lozano Bahilo J, Luna García R, Maccarone MC, Macolino C, Maldera S, Mancarella G, Manceñido ME, Mandat D, Mantsch P, Mariazzi AG, Maris IC, Marquez Falcon HR, Martello D, Martínez J, Martínez Bravo O, Mathes HJ, Matthews J, Matthews JAJ, Matthiae G, Maurizio D, Mazur PO, McCauley T, McEwen M, McNeil RR, Medina MC, Medina-Tanco G, Meli A, Melo D, Menichetti E, Menschikov A, Meurer C, Meyhandan R, Micheletti MI, Miele G, Miller W, Mollerach S, Monasor M, Monnier Ragaigne D, Montanet F, Morales B, Morello C, Moreno JC, Morris C, Mostafá M, Muller MA, Mussa R, Navarra G, Navarro JL, Navas S, Necesal P, Nellen L, Newman-Holmes C, Newton D, Nguyen Thi T, Nierstenhoefer N, Nitz D, Nosek D, Nozka L, Oehlschläger J, Ohnuki T, Olinto A, Olmos-Gilbaja VM, Ortiz M, Ortolani F, Ostapchenko S, Otero L, Pacheco N, Pakk Selmi-Dei D, Palatka M, Pallotta J, Parente G, Parizot E, Parlati S, Pastor S, Patel M, Paul T, Pavlidou V, Payet K, Pech M, Pekala J, Pelayo R, Pepe IM, Perrone L, Petrera S, Petrinca P, Petrov Y, Pham Ngoc D, Pham Ngoc D, Pham Thi TN, Pichel A, Piegaia R, Pierog T, Pimenta M, Pinto T, Pirronello V, Pisanti O, Platino M, Pochon J, Privitera P, Prouza M, Quel EJ, Rautenberg J, Redondo A, Reucroft S, Revenu B, Rezende FAS, Ridky J, Riggi S, Risse M, Rivière C, Rizi V, Roberts M, Robledo C, Rodriguez G, Rodríguez Frías D, Rodriguez Martino J, Rodriguez Rojo J, Rodriguez-Cabo I, Ros G, Rosado J, Roth M, Rouillé-d'Orfeuil B, Roulet E, Rovero AC, Salamida F, Salazar H, Salina G, Sánchez F, Santander M, Santo CE, Santos EM, Sarazin F, Sarkar S, Sato R, Scherini V, Schieler H, Schmidt A, Schmidt F, Schmidt T, Scholten O, Schovánek P, Schüssler F, Sciutto SJ, Scuderi M, Segreto A, Semikoz D, Settimo M, Shellard RC, Sidelnik I, Siffert BB, Sigl G, Smetniansky De Grande N, Smiałkowski A, Smída R, Smith AGK, Smith BE, Snow GR, Sokolsky P, Sommers P, Sorokin J, Spinka H, Squartini R, Strazzeri E, Stutz A, Suarez F, Suomijärvi T, Supanitsky AD, Sutherland MS, Swain J, Szadkowski Z, Takahashi J, Tamashiro A, Tamburro A, Taşcău O, Tcaciuc R, Thomas D, Ticona R, Tiffenberg J, Timmermans C, Tkaczyk W, Todero Peixoto CJ, Tomé B, Tonachini A, Torres I, Torresi D, Travnicek P, Tripathi A, Tristram G, Tscherniakhovski D, Tueros M, Tunnicliffe V, Ulrich R, Unger M, Urban M, Valdés Galicia JF, Valiño I, Valore L, van den Berg AM, van Elewyck V, Vázquez RA, Veberic D, Veiga A, Velarde A, Venters T, Verzi V, Videla M, Villaseñor L, Vorobiov S, Voyvodic L, Wahlberg H, Wainberg O, Walker P, Warner D, Watson AA, Westerhoff S, Wieczorek G, Wiencke L, Wilczyńska B, Wilczyński H, Wileman C, Winnick MG, Wu H, Wundheiler B, Yamamoto T, Younk P, Zas E, Zavrtanik D, Zavrtanik M, Zech A, Zepeda A, Ziolkowski M. Upper limit on the diffuse flux of ultrahigh energy tau neutrinos from the Pierre Auger Observatory. Phys Rev Lett 2008; 100:211101. [PMID: 18518595 DOI: 10.1103/physrevlett.100.211101] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2007] [Indexed: 05/26/2023]
Abstract
The surface detector array of the Pierre Auger Observatory is sensitive to Earth-skimming tau neutrinos that interact in Earth's crust. Tau leptons from nu(tau) charged-current interactions can emerge and decay in the atmosphere to produce a nearly horizontal shower with a significant electromagnetic component. The data collected between 1 January 2004 and 31 August 2007 are used to place an upper limit on the diffuse flux of nu(tau) at EeV energies. Assuming an E(nu)(-2) differential energy spectrum the limit set at 90% C.L. is E(nu)(2)dN(nu)(tau)/dE(nu)<1.3 x 10(-7) GeV cm(-2) s(-1) sr(-1) in the energy range 2 x 10(17) eV< E(nu)< 2 x 10(19) eV.
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Affiliation(s)
- J Abraham
- Centro de Investigaciones en Laseres y Aplicaciones, CITEFA and CONICET, Argentina
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Abraham J, Abreu P, Aglietta M, Aguirre C, Allard D, Allekotte I, Allen J, Allison P, Alvarez C, Alvarez-Muñiz J, Ambrosio M, Anchordoqui L, Andringa S, Anzalone A, Aramo C, Argirò S, Arisaka K, Armengaud E, Arneodo F, Arqueros F, Asch T, Asorey H, Assis P, Atulugama BS, Aublin J, Ave M, Avila G, Bäcker T, Badagnani D, Barbosa AF, Barnhill D, Barroso SLC, Bauleo P, Beatty J, Beau T, Becker BR, Becker KH, Bellido JA, BenZvi S, Berat C, Bergmann T, Bernardini P, Bertou X, Biermann PL, Billoir P, Blanch-Bigas O, Blanco F, Blasi P, Bleve C, Blümer H, Boháčová M, Bonifazi C, Bonino R, Boratav M, Brack J, Brogueira P, Brown WC, Buchholz P, Bueno A, Busca NG, Caballero-Mora KS, Cai B, Camin DV, Caruso R, Carvalho W, Castellina A, Catalano O, Cataldi G, Cazón-Boado L, Cester R, Chauvin J, Chiavassa A, Chinellato JA, Chou A, Chye J, Clark PDJ, Clay RW, Colombo E, Conceição R, Connolly B, Contreras F, Coppens J, Cordier A, Cotti U, Coutu S, Covault CE, Creusot A, Cronin J, Dagoret-Campagne S, Daumiller K, Dawson BR, de Almeida RM, De Donato C, de Jong SJ, De La Vega G, de Mello Junior WJM, de Mello Neto JRT, De Mitri I, de Souza V, del Peral L, Deligny O, Selva AD, Fratte CD, Dembinski H, Di Giulio C, Diaz JC, Dobrigkeit C, D'Olivo JC, Dornic D, Dorofeev A, Anjos JCD, Dova MT, D'Urso D, DuVernois MA, Engel R, Epele L, Erdmann M, Escobar CO, Etchegoyen A, Luis PFS, Falcke H, Farrar G, Fauth AC, Fazzini N, Fernández A, Ferrer F, Ferry S, Fick B, Filevich A, Filipčič A, Fleck I, Fonte R, Fracchiolla CE, Fulgione W, García B, García Gámez D, Garcia-Pinto D, Garrido X, Geenen H, Gelmini G, Gemmeke H, Ghia PL, Giller M, Glass H, Gold MS, Golup G, Albarracin FG, Berisso MG, Herrero RG, Gonçalves P, do Amaral MG, Gonzalez D, Gonzalez JG, González M, Góra D, Gorgi A, Gouffon P, Grassi V, Grillo A, Grunfeld C, Guardincerri Y, Guarino F, Guedes GP, Gutiérrez J, Hague JD, Hamilton JC, Hansen P, Harari D, Harmsma S, Harton JL, Haungs A, Hauschildt T, Healy MD, Hebbeker T, Heck D, Hojvat C, Holmes VC, Homola P, Hörandel J, Horneffer A, Horvat M, Hrabovský M, Huege T, Iarlori M, Insolia A, Ionita F, Italiano A, Kaducak M, Kampert KH, Keilhauer B, Kemp E, Kieckhafer RM, Klages HO, Kleifges M, Kleinfeller J, Knapik R, Knapp J, Koang DH, Kopmann A, Krieger A, Krömer O, Kümpel D, Kunka N, Kusenko A, La Rosa G, Lachaud C, Lago BL, Lebrun D, LeBrun P, Lee J, de Oliveira MAL, Letessier-Selvon A, Leuthold M, Lhenry-Yvon I, López R, Lopez Agüera A, Bahilo JL, Maccarone MC, Macolino C, Maldera S, Malek M, Mancarella G, Manceñido ME, Mandat D, Mantsch P, Mariazzi AG, Maris IC, Martello D, Martínez J, Bravo OM, Mathes HJ, Matthews J, Matthews JAJ, Matthiae G, Maurizio D, Mazur PO, McCauley T, McEwen M, McNeil RR, Medina MC, Medina-Tanco G, Meli A, Melo D, Menichetti E, Menschikov A, Meurer C, Meyhandan R, Micheletti MI, Miele G, Miller W, Mollerach S, Monasor M, Ragaigne DM, Montanet F, Morales B, Morello C, Moreno E, Moreno JC, Morris C, Mostafá M, Muller MA, Mussa R, Navarra G, Navarro JL, Navas S, Nellen L, Newman-Holmes C, Newton D, Thi TN, Nierstenhöfer N, Nitz D, Nosek D, Nožka L, Oehlschläger J, Ohnuki T, Olinto A, Olmos-Gilbaja VM, Ortiz M, Ostapchenko S, Otero L, Selmi-Dei DP, Palatka M, Pallotta J, Parente G, Parizot E, Parlati S, Pastor S, Patel M, Paul T, Pavlidou V, Payet K, Pech M, Pȩkala J, Pelayo R, Pepe IM, Perrone L, Petrera S, Petrinca P, Petrov Y, Ngoc D, Ngoc D, Thi TNP, Pichel A, Piegaia R, Pierog T, Pimenta M, Pinto T, Pirronello V, Pisanti O, Platino M, Pochon J, Porter TA, Privitera P, Prouza M, Quel EJ, Rautenberg J, Reucroft S, Revenu B, Rezende FAS, Řídký J, Riggi S, Risse M, Rivière C, Rizi V, Roberts M, Robledo C, Rodriguez G, Frías DR, Martino JR, Rojo JR, Rodriguez-Cabo I, Ros G, Rosado J, Roth M, Rouillé-d'Orfeuil B, Roulet E, Rovero AC, Salamida F, Salazar H, Salina G, Sánchez F, Santander M, Santo CE, Santos EM, Sarazin F, Sarkar S, Sato R, Scherini V, Schieler H, Schmidt F, Schmidt T, Scholten O, Schovánek P, Schüssler F, Sciutto SJ, Scuderi M, Segreto A, Semikoz D, Settimo M, Shellard RC, Sidelnik I, Siffert BB, Sigl G, De Grande NS, Smiałkowski A, šmída R, Smith AGK, Smith BE, Snow GR, Sokolsky P, Sommers P, Sorokin J, Spinka H, Squartini R, Strazzeri E, Stutz A, Suarez F, Suomijärvi T, Supanitsky AD, Sutherland MS, Swain J, Szadkowski Z, Takahashi J, Tamashiro A, Tamburro A, Taşcău O, Tcaciuc R, Thomas D, Ticona R, Tiffenberg J, Timmermans C, Tkaczyk W, Peixoto CJT, Tomé B, Tonachini A, Torresi D, Travnicek P, Tripathi A, Tristram G, Tscherniakhovski D, Tueros M, Tunnicliffe V, Ulrich R, Unger M, Urban M, Galicia JFV, Valiño I, Valore L, van den Berg AM, van Elewyck V, Vázquez RA, Veberič D, Veiga A, Velarde A, Venters T, Verzi V, Videla M, Villaseñor L, Vorobiov S, Voyvodic L, Wahlberg H, Wainberg O, Waldenmaier T, Walker P, Warner D, Watson AA, Westerhoff S, Wieczorek G, Wiencke L, Wilczyńska B, Wilczyński H, Wileman C, Winnick MG, Wu H, Wundheiler B, Xu J, Yamamoto T, Younk P, Zas E, Zavrtanik D, Zavrtanik M, Zech A, Zepeda A, Ziolkowski M. Correlation of the Highest-Energy Cosmic Rays with Nearby Extragalactic Objects. Science 2007; 318:938-43. [DOI: 10.1126/science.1151124] [Citation(s) in RCA: 560] [Impact Index Per Article: 32.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Morris JD, Voskoboynik D, Brown WC, Czarnecki S, Morris CL. Monitoring plasma voriconazole levels may prevent subtheraputic dosing in pediatric stem cell transplant (SCT) patients. J Clin Oncol 2007. [DOI: 10.1200/jco.2007.25.18_suppl.7105] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
7105 Background: Voriconazole is frequently used for prophylaxis and treatment of fungal infections during hematopoeitic stem cell transplant (SCT). Clinical studies demonstrate a poorer outcome when voriconazole concentrations are ≤0.5mcg/ml. Pediatric dosing schedules to achieve trough concentrations >0.5mcg/ml are not established. Methods: Retrospective analysis of voriconazole levels in 16 pediatric allogeneic SCT patients recieving fungal prophylaxis with oral or iv voriconazole. Ages ranged from 0.5 to 16 years, median 8 years. Serum levels were measured by high-performance liquid chromatography. Samples were obtained 5 to 7 days after start or change of voriconazole therapy. Ninety-eight total levels were evaluated. Results: Eight patients (50%) achieved a trough level > 0.5mcg/ml on the majority of samples tested at doses ranging from 3.5 to 10 mg/kg po q 12 hours. At constant dose there was a significant intra-patient variability in trough levels over time. Most patients failing to achieve adequate trough levels were below the median age (see table ). Changing to iv therapy in 3 patients with low trough levels after oral therapy did not improve the trough levels. Multi-time point measurements were > 0.5mcg/ml at 2 to 6 hours after oral dose, but fell to < 0.2mcg/ml by 12 hours in 3 patients tested. Of 98 voriconazole levels, 52 were ≤ 0.5mcg/ml and 74 were < 1.0 mcg/ml. Conclusions: Unlike reports in adult patients, we found that frequent monitoring of voriconazole levels was necessary in pediatric SCT patients due to intra-patient variability. Younger pediatric SCT patients may require more frequent dosing schedules to achieve trough levels. No significant financial relationships to disclose. [Table: see text]
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Affiliation(s)
- J. D. Morris
- Loma Linda University Medical Center, Loma Linda, CA
| | | | - W. C. Brown
- Loma Linda University Medical Center, Loma Linda, CA
| | - S. Czarnecki
- Loma Linda University Medical Center, Loma Linda, CA
| | - C. L. Morris
- Loma Linda University Medical Center, Loma Linda, CA
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Abstract
We sought to identify antigens from Haemonchus contortus, an abomasal nematode of small ruminants, that stimulate local (abomasal lymph node, ALN) CD4+ T lymphocyte responses during a primary infection. Results led to a focus on antigens from the parasite intestine. The H. contortus intestine proved to be a major source of antigens that stimulated ALN CD4+, CD25+ T lymphocyte responses during infections in lambs. When stimulated by intestinal antigens, ALN lymphocytes from these lambs expressed IL-4 and IL-13 transcripts, and, more variably, IFN-gamma. An immunoaffinity-purified fraction, enriched for H. contortus apical intestinal membrane proteins, stimulated similar ALN responses. On further fractionation, antigens from six size classes (ranging from 30 to 200 kDa) also stimulated proliferation of ALN lymphocytes. Mass spectrometry analysis of these size classes identified several known apical intestinal membrane proteins from H. contortus. The results show that H. contortus intestinal antigens warrant investigation in strategies to induce mucosal immunity against this parasite. The specific proteins identified have value for this purpose. The results are in contrast with the now generalized idea that H. contortus intestinal antigens are 'hidden' from the host immune system, and this issue is discussed. The approach also has potential application to other gastrointestinal nematode parasites.
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Affiliation(s)
- D P Jasmer
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA 99164-7040, USA.
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Bastos RG, Johnson WC, Brown WC, Goff WL. Differential response of splenic monocytes and DC from cattle to microbial stimulation with Mycobacterium bovis BCG and Babesia bovis merozoites. Vet Immunol Immunopathol 2007; 115:334-45. [PMID: 17161869 DOI: 10.1016/j.vetimm.2006.11.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2006] [Revised: 10/25/2006] [Accepted: 11/02/2006] [Indexed: 10/23/2022]
Abstract
Both bovine peripheral blood monocyte-derived dendritic cells (DC) and myeloid DC from afferent lymph have been described, but resident DC from other bovine tissues have not been fully characterized. The spleen as a secondary lymphoid organ is central to the innate and acquired immune response to various diseases particularly hemoprotozoan infections like babesiosis. Therefore, we developed methods to demonstrate the presence of myeloid DC from the spleen of cattle and have partially characterized a DC population as well as another myeloid cell population with monocyte characteristics. The phenotypic profile of each population was CD13+CD172a+/-CD14-CD11a-CD11b+/-CD11c+ and CD172a+CD13+/-CD14+CD11a-CD11b+/-CD11c+, respectively. The CD13+ population was found exclusively in the spleen whereas the CD172a+ population was present at the same percentage in the spleen and peripheral blood. CD13+ cells developed a typical veiled appearance when in culture for 96 h. The two cell populations differed in their ability to produce nitric oxide and had a different pattern of cytokine mRNA when stimulated with Mycobacterium bovis BCG or Babesia bovis merozoites. The data demonstrate the presence of a myeloid splenic DC with attributes consistent with an immature status.
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Affiliation(s)
- R G Bastos
- Animal Disease Research Unit, USDA-ARS, Washington State University, 3003 ADBF, P.O. Box 646630, Pullman, WA 99164-6630, USA
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Abstract
Babesial parasites infect cattle in tropical and temperate regions of the world and cause significant morbidity and mortality. Discovery of protective antigens that could be used in a killed vaccine has been slow and to date there are few promising vaccine candidates for cattle Babesia. This review describes mechanisms of protective innate and adaptive immune responses to babesial parasites and different strategies to identify potentially protective protein antigens of B. bovis, B. bigemina, and B. divergens. Successful parasites often cause persistent infection, and this paper also discusses how B. bovis evades and regulates the immune response to promote survival of parasite and host. Development of successful non-living recombinant vaccines will depend on increased understanding of protective immune mechanisms and availability of parasite genomes.
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Affiliation(s)
- W C Brown
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA 99164-7040, USA.
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Hope JC, Kwong LS, Thom M, Sopp P, Mwangi W, Brown WC, Palmer GH, Wattegedera S, Entrican G, Howard CJ. Development of detection methods for ruminant interleukin (IL)-4. J Immunol Methods 2005; 301:114-23. [PMID: 15979636 DOI: 10.1016/j.jim.2005.04.010] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2004] [Revised: 03/10/2005] [Accepted: 04/06/2005] [Indexed: 10/25/2022]
Abstract
Recombinant bovine IL-4 (rbo IL-4) was transiently expressed in COS-7 cells. Mice were immunised with a plasmid encoding rbo IL-4 and boosted with rbo IL-4. A number of monoclonal antibodies (mAb) were generated that reacted with rbo IL-4 in an ELISA and these cloned hybridomas were termed CC311, CC312, CC313 and CC314. A pair of mAb (CC313 and CC314) was identified that together could be used to detect both recombinant and native bovine IL-4 by ELISA and a luminometric detection method was applied to the ELISA. Using this method native bovine IL-4 was detected in supernatants of PBMC stimulated with mitogens. In addition, high level secretion of IL-4 by Fasciola hepatica specific Th2 clones, but not by a Babesia bovis specific Th1 clone, was confirmed. The ELISA was also able to detect recombinant ovine IL-4. The pair of mAb used for ELISA could also be used for the detection of IL-4 spot forming cells by ELISPOT. In addition intracytoplasmic expression of IL-4 could be detected. The ability to detect ruminant IL-4 by three methods: ELISA, ELISPOT and by flow cytometric analysis of intracytoplasmic expression will permit studies of the role of this important cytokine in the immunology and pathogenesis of animal diseases.
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Affiliation(s)
- J C Hope
- Institute for Animal Health, Compton, Near Newbury, RG20 7NN, UK.
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Abstract
Babesia bovis is an economically important hemoprotozoon parasite o f cattle that is prevalent in many, tropical and subtropical regions o f the world. Effective vaccines against this tick-transmitted parasite consist o f live organisms attenuated by passage through splenectomized calves. However, the nature o f acquired resistance to challenge infection with heterologous isolates of this parasite has not been clearly defined. Unsuccessful attempts to select protective antigens have relied upon the use of antibodies to identify immunodominant proteins. In this review, Wendy Brown and Allison Rice-Ficht discuss the limitations of this approach and the rationale behind using helper T cells to select potential vaccine antigens.
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Affiliation(s)
- W C Brown
- Department of Veterinary Pathobiology, College of Veterinary Medicine, Texas A & M University, College Station, TX 77843, USA
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Van Kleef M, Macmillan H, Gunter NJ, Zweygarth E, Allsopp BA, Shkap V, Du Plessis DH, Brown WC. Low molecular weight proteins of Cowdria ruminantium (Welgevonden isolate) induce bovine CD4+-enriched T-cells to proliferate and produce interferon-gamma. Vet Microbiol 2002; 85:259-73. [PMID: 11852193 DOI: 10.1016/s0378-1135(01)00516-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
An important objective in vaccination strategies is to activate lymphocytes with particular effector functions. Cellular immunity and the type I cytokine IFN-gamma have been implicated in protective immunity to heartwater. Furthermore, low molecular weight proteins of Cowdria ruminantium have been shown to induce peripheral blood mononuclear cells to proliferate. To determine which lymphocyte subset responds when stimulated with fractionated C. ruminantium proteins, specific short-term lymphocyte cultures were established from cattle immunized with the Welgevonden isolate. Four cattle were immunized, two by infection and treatment and two with inactivated organisms. Cell surface phenotypic analysis of the cultures indicated that CD4+ lymphocytes were enriched over time. This coincided with increased antigen-specific proliferation and IFN-gamma production. Proteins of molecular weights 13-18kDa induced the CD4+-enriched T-cell cultures, derived from each of the animals, to proliferate and produce IFN-gamma. Although the two groups of cattle were immunized differently, their lymphocytes responded similarly. These results extend previous findings by identifying the responder cells as being predominantly IFN-gamma producing CD4+ lymphocytes. This cytokine has been implicated in immunity to the parasite. The low molecular weight proteins that induced CD4+ lymphocytes to proliferate and produce IFN-gamma are therefore likely to be important in protection against heartwater and may have a role in vaccine development.
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Affiliation(s)
- M Van Kleef
- Immunology Division, Onderstepoort Veterinary Institute, Private Bag X5, 0110, Onderstepoort, South Africa.
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Brown WC. Molecular approaches to elucidating innate and acquired immune responses to Babesia bovis, a protozoan parasite that causes persistent infection. Vet Parasitol 2001; 101:233-48. [PMID: 11707299 DOI: 10.1016/s0304-4017(01)00569-6] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
For many vector-transmitted protozoal parasites, immunological control of acute infection leads to a state of persistent infection during which parasitemias may cycle unnoticed in infected but otherwise clinically healthy animals. Achieving persistent infection is a strategy that favors parasitism, since both host and, therefore, parasite survive, and endemically infected animal populations provide a reservoir of parasites continually available for subsequent transmission. Examples of the major economically important protozoan pathogens that cause persistent infection in mammals include the related Theileria and Babesia parasites as well as Trypanosoma species. Control of acute infection and maintenance of clinical immunity against subsequent infection are determined by the interplay of innate and acquired immune responses. This review will focus on approaches taken to gain an understanding of the molecular basis for innate and acquired immunity against the hemoprotozoan parasite of cattle, Babesia bovis. Knowledge of mechanisms used by the parasite to survive within infected cattle from acute to persistent infection combined with definition of the correlates of protective immunity in cattle should be applicable to designing effective vaccines.
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Affiliation(s)
- W C Brown
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, WA 99164-7040, USA.
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Brown WC, Ruef BJ, Norimine J, Kegerreis KA, Suarez CE, Conley PG, Stich RW, Carson KH, Rice-Ficht AC. A novel 20-kilodalton protein conserved in Babesia bovis and B. bigemina stimulates memory CD4(+) T lymphocyte responses in B. bovis-immune cattle. Mol Biochem Parasitol 2001; 118:97-109. [PMID: 11704278 DOI: 10.1016/s0166-6851(01)00375-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Acquired immunity against the hemoprotozoan parasite Babesia bovis is believed to depend on activation of antigen-specific CD4(+) T lymphocytes and IFN-gamma production. A strategy was employed to identify potentially protective antigens from B. bovis based on memory CD4(+) T lymphocyte recognition of fractionated merozoite proteins. Fractions of merozoites separated by continuous flow electrophoresis (CFE) that contained proteins of approximately 20 kDa were shown previously to stimulate memory CD4(+) lymphocyte responses in B. bovis-immune cattle with different MHC class II haplotypes. Expression library screening with rabbit antiserum raised against an immunostimulatory 20-kDa CFE fraction identified a 20-kDa protein (Bbo20) that contains a B lymphocyte epitope conserved in geographically distant B. bovis strains. An homologous 20-kDa protein that has 86.4% identity with Bbo20 and contains the conserved B cell epitope was identified in B. bigemina (Bbg20). Southern blot analysis indicated that both Babesia proteins are encoded by a single gene. Antibody against recombinant Bbo20 protein identified the antigen in CFE fractions shown previously to stimulate memory T lymphocyte responses in immune cattle. To verify Bbo20 as an immunostimulatory T lymphocyte antigen, CD4(+) T cell lines were propagated from B. bovis-immune cattle with merozoite antigen and shown to proliferate significantly against recombinant Bbo20 protein. Furthermore, Bbo20-specific CD4(+) T cell clones proliferated in response to several B. bovis strains and produced IFN-gamma. BLAST analysis revealed significant similarity of the Bbo20 and Bbg20 amino acid sequences with the hsp20/alpha-crystallin family.
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Affiliation(s)
- W C Brown
- Program in Vector-Borne Diseases, Department of Veterinary Microbiology and Pathology, Washington State University, PO Box 647040, Pullman, WA 99164-7040, USA.
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Brown WC, Palmer GH, Lewin HA, McGuire TC. CD4(+) T lymphocytes from calves immunized with Anaplasma marginale major surface protein 1 (MSP1), a heteromeric complex of MSP1a and MSP1b, preferentially recognize the MSP1a carboxyl terminus that is conserved among strains. Infect Immun 2001; 69:6853-62. [PMID: 11598059 PMCID: PMC100064 DOI: 10.1128/iai.69.11.6853-6862.2001] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2001] [Accepted: 07/29/2001] [Indexed: 11/20/2022] Open
Abstract
Native major surface protein 1 (MSP1) of the ehrlichial pathogen Anaplasma marginale induces protective immunity in calves challenged with homologous and heterologous strains. MSP1 is a heteromeric complex of a single MSP1a protein covalently associated with MSP1b polypeptides, of which at least two (designated MSP1F1 and MSP1F3) in the Florida strain are expressed. Immunization with recombinant MSP1a and MSP1b alone or in combination fails to provide protection. The protective immunity in calves immunized with native MSP1 is associated with the development of opsonizing and neutralizing antibodies, but CD4(+) T-lymphocyte responses have not been evaluated. CD4(+) T lymphocytes participate in protective immunity to ehrlichial pathogens through production of gamma interferon (IFN-gamma), which promotes switching to high-affinity immunoglobulin G (IgG) and activation of phagocytic cells to produce nitric oxide. Thus, an effective vaccine for A. marginale and related organisms should contain both T- and B-lymphocyte epitopes that induce a strong memory response that can be recalled upon challenge with homologous and heterologous strains. This study was designed to determine the relative contributions of MSP1a and MSP1b proteins, which contain both variant and conserved amino acid sequences, in stimulating memory CD4(+) T-lymphocyte responses in calves immunized with native MSP1. Peripheral blood mononuclear cells and CD4(+) T-cell lines from MSP1-immunized calves proliferated vigorously in response to the immunizing strain (Florida) and heterologous strains of A. marginale. The conserved MSP1-specific response was preferentially directed to the carboxyl-terminal region of MSP1a, which stimulated high levels of IFN-gamma production by CD4(+) T cells. In contrast, there was either weak or no recognition of MSP1b proteins. Paradoxically, all calves developed high titers of IgG antibodies to both MSP1a and MSP1b polypeptides. These findings suggest that in calves immunized with MSP1 heteromeric complex, MSP1a-specific T lymphocytes may provide help to MSP1b-specific B lymphocytes. The data provide a basis for determining whether selected MSP1a CD4(+) T-lymphocyte epitopes and selected MSP1a and MSP1b B-lymphocyte epitopes presented on the same molecule can stimulate a protective immune response.
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Affiliation(s)
- W C Brown
- Program in Vector-Borne Diseases, Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, Washington 99164, USA.
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Zhang Y, Shoda LK, Brayton KA, Estes DM, Palmer GH, Brown WC. Induction of interleukin-6 and interleukin-12 in bovine B lymphocytes, monocytes, and macrophages by a CpG oligodeoxynucleotide (ODN 2059) containing the GTCGTT motif. J Interferon Cytokine Res 2001; 21:871-81. [PMID: 11711000 DOI: 10.1089/107999001753238123] [Citation(s) in RCA: 42] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Bacterial DNA and synthetic oligodeoxynucleotides (ODN) that contain unmethylated CpG dinucleotides flanked by certain bases (CpG ODN) have been shown to activate murine and human B cells and to induce proinflammatory cytokines by monocytes/macrophages and dendritic cells (DC). However, the CpG ODN sequences optimal for mice and humans are different. In the current study, the effects of CpG ODN, which were defined to stimulate strong responses in either mouse or human leukocytes, were compared for stimulation of bovine B lymphocyte proliferation and macrophage cytokine mRNA expression. The optimal CpG ODN was then tested for induction of cytokines in peripheral blood mononuclear cells (PBMC) and purified B lymphocytes, monocytes, and macrophages. At a high ODN concentration (40 microM), all but two CpG ODN tested stimulated B cell proliferation, which was dependent on unmethylated CpG motifs. CpG ODN 2059 containing the GTCGTT motif shown to activate human leukocytes also promoted the highest level of bovine B cell proliferation at a lower concentration (10 microM) when compared with CpG ODN containing AACGTT or GACGTT motifs active for murine leukocytes. Furthermore, ODN 2059 induced interleukin-6 (IL-6) production by B lymphocytes and IL-6 and IL-12 production by PBMC, monocytes, and macrophages. In contrast, IL-1beta and tumor necrosis factor-alpha (TNF-alpha) production was either very low or undetectable. Consistent with increased IL-12 production, ODN 2059 also stimulated interferon-gamma (IFN-gamma) production by PBMC. Importantly, the levels of cytokines induced by ODN 2059 were comparable to those generated in response to Escherichia coli DNA. The weak TNF-alpha response combined with the vigorous IL-6 and IL-12 response to ODN 2059 indicate the potential use of this CpG ODN as an adjuvant to enhance both antibody-mediated and IFN-gamma-mediated macrophage activation, which are important for protection against disease caused by intracellular pathogens of cattle.
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Affiliation(s)
- Y Zhang
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, WA 99164, USA
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Florin-Christensen J, Suarez CE, Florin-Christensen M, Wainszelbaum M, Brown WC, McElwain TF, Palmer GH. A unique phospholipid organization in bovine erythrocyte membranes. Proc Natl Acad Sci U S A 2001; 98:7736-41. [PMID: 11427712 PMCID: PMC35411 DOI: 10.1073/pnas.131580998] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Ruminant erythrocytes are remarkable for their choline-phospholipid anomalies; namely, low or absent phosphatidylcholine (PC) along with high sphingomyelin levels. Here, we report another anomaly in bovine erythrocytes that affects aminophospholipids: phosphatidylethanolamine (PE) shows an extreme asymmetry, with only 2% of the total present in the outer leaflet. Furthermore, we found that phospholipase A(2), an enzyme located on the external surface of the erythrocytes, shows higher activity against PC than against PE. In addition, we observed that acylation of PE is by far the most important biosynthetic event in this system. We propose that deacylation of PE and PC by phospholipase A(2) to generate lysocompounds, followed by selective reacylation of lyso-PE in the inner leaflet, can account for the compositional and architectural peculiarities of bovine erythrocyte membranes.
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Affiliation(s)
- J Florin-Christensen
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA 99164-7040, USA
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Shoda LK, Kegerreis KA, Suarez CE, Mwangi W, Knowles DP, Brown WC. Immunostimulatory CpG-modified plasmid DNA enhances IL-12, TNF-alpha, and NO production by bovine macrophages. J Leukoc Biol 2001; 70:103-12. [PMID: 11435492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2023] Open
Abstract
The immunogenicity of DNA vaccines is partially attributable to the adjuvant properties of bacterial plasmid DNA (pDNA) for B lymphocytes and professional antigen-presenting cells. In mice, modification of immunostimulatory sequences (ISSs), including CpG motifs, in pDNA vectors or oligodeoxynucleotides can increase or decrease their adjuvant properties. ISSs that stimulate optimal responses reportedly differ for murine and human leukocytes. We have previously characterized the mitogenic properties of oligodeoxynucleotides containing one AACGTT motif for bovine B lymphocytes. We now define cytokine responses by macrophages stimulated with pDNA engineered to contain an ISS comprising two AACGTT motifs. Macrophages activated with CpG-modified pDNA secreted significantly more interleukin-12, tumor necrosis factor-alpha, and nitric oxide than macrophages stimulated with unmodified pDNA or modified pDNA that contained nucleotides scrambled to remove CpG motifs. Engineered CpG-pDNA or CpG-oligodeoxynucleotides should be useful as vaccines or adjuvants to promote the enhanced type 1 responses important for protection against intracellular pathogens.
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Affiliation(s)
- L K Shoda
- Program in Vector-Borne Diseases, Department of Veterinary Microbiology and Pathology, United States Department of Agriculture, Agricultural Research Service, Washington State University, Pullman, Washington 99164-7040, USA
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Shoda LK, Kegerreis KA, Suarez CE, Roditi I, Corral RS, Bertot GM, Norimine J, Brown WC. DNA from protozoan parasites Babesia bovis, Trypanosoma cruzi, and T. brucei is mitogenic for B lymphocytes and stimulates macrophage expression of interleukin-12, tumor necrosis factor alpha, and nitric oxide. Infect Immun 2001; 69:2162-71. [PMID: 11254571 PMCID: PMC98143 DOI: 10.1128/iai.69.4.2162-2171.2001] [Citation(s) in RCA: 118] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2000] [Accepted: 01/05/2001] [Indexed: 01/29/2023] Open
Abstract
The activation of innate immune responses by genomic DNA from bacteria and several nonvertebrate organisms represents a novel mechanism of pathogen recognition. We recently demonstrated the CpG-dependent mitogenic activity of DNA from the protozoan parasite Babesia bovis for bovine B lymphocytes (W. C. Brown, D. M. Estes, S. E. Chantler, K. A. Kegerreis, and C. E. Suarez, Infect. Immun. 66:5423-5432, 1998). However, activation of macrophages by DNA from protozoan parasites has not been demonstrated. The present study was therefore conducted to determine whether DNA from the protozan parasites B. bovis, Trypanosoma cruzi, and T. brucei activates macrophages to secrete inflammatory mediators associated with protective immunity. DNA from Escherichia coli and all three parasites stimulated B-lymphocyte proliferation and increased macrophage production of interleukin-12 (IL-12), tumor necrosis factor alpha (TNF-alpha), and nitric oxide (NO). Regulation of IL-12 and NO production occurred at the level of transcription. The amounts of IL-12, TNF-alpha, and NO induced by E. coli and protozoal DNA were strongly correlated (r2 > 0.9) with the frequency of CG dinucleotides in the genome, and immunostimulation by DNA occurred in the order E. coli > or = T. cruzi > T. brucei > B. bovis. Induction of inflammatory mediators by E. coli, T. brucei, and B. bovis DNA was dependent on the presence of unmethylated CpG dinucleotides. However, at high concentrations, E. coli and T. cruzi DNA-mediated macrophage activation was not inhibited following methylation. The recognition of protozoal DNA by B lymphocytes and macrophages may provide an important innate defense mechanism to control parasite replication and promote persistent infection.
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Affiliation(s)
- L K Shoda
- Program in Vector-Borne Diseases, Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, Washington 99164, USA
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Valdez RA, McGuire TC, Brown WC, Davis WC, Knowles DP. Long-term in vivo depletion of functional CD4+ T lymphocytes from calves requires both thymectomy and anti-CD4 monoclonal antibody treatment. Immunology 2001; 102:426-33. [PMID: 11328376 PMCID: PMC1783208 DOI: 10.1046/j.1365-2567.2001.01211.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In vivo depletion of lymphocyte subsets is a direct approach used for dissection of the mechanisms of protective immunity. Long-term in vivo depletion of bovine T lymphocyte subpopulations with monoclonal antibody (mAb) treatment alone has been difficult to achieve. The objective of this study was to determine whether both thymectomy and anti-CD4 mAb treatment would optimize long-term in vivo depletion of functional bovine CD4+ T lymphocytes. Calves were thymectomized and treated with high doses of anti-CD4 mAb (approximately 5 mg/kg) over 4 days followed by subsequent lower doses (approximately 0.3 mg/kg) administered twice weekly for an additional 7 weeks. Depletion of CD4+ T lymphocytes from blood, spleen and peripheral lymph nodes was significantly improved in thymectomized calves compared to thymus-intact anti-CD4 mAb-treated calves. Significant differences in percentages of CD4+ T lymphocytes between thymectomized and thymus-intact calves were sustained for the duration of the 8-week study. Depletion of CD4+ T lymphocytes from thymectomized calves resulted in complete abrogation of lymphoproliferative responses to ovalbumin. In addition, thymectomized calves treated with anti-CD4 mAb had significantly reduced immunoglobulin G1 and no detectable immunoglobulin G2 ovalbumin-specific antibody responses compared to thymus-intact anti-CD4 mAb-treated calves. The results of this study demonstrate that both thymectomy and treatment with anti-CD4 mAb are required for long-term in vivo depletion of functional bovine CD4+ T lymphocytes.
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Affiliation(s)
- R A Valdez
- United States Department of Agriculture, Agricultural Research Service, Animal Disease Research Unit, Pullman, WA 99164-6630, USA.
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27
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Brown WC. A journey from capitation to loss. J Indiana Dent Assoc 2001; 75:46-7. [PMID: 9518758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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Valdez RA, McGuire TC, Brown WC, Davis WC, Knowles DP. An in vivo model to investigate lymphocyte-mediated immunity during acute hemoparasitic infections. Use of a monoclonal antibody to selectively deplete CD4+ T lymphocytes from thymectomized calves. Ann N Y Acad Sci 2001; 916:233-6. [PMID: 11193625 DOI: 10.1111/j.1749-6632.2000.tb05294.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Thymectomized calves were selectively depleted of CD4+ T lymphocytes with a monoclonal antibody (mAb) specific for the bovine CD4 monomer (ILA-11). Calves were treated with high loading doses of ILA-11 during the first week of the study then treated with subsequent lower maintenance doses. Depletion of CD4+ T lymphocytes was assessed weekly by flow cytometric analysis of PBMC and mononuclear cells from lymph node and spleen biopsies. Treatment with high doses of ILA-11 resulted in rapid and marked depletion of CD4+ T lymphocytes from the peripheral blood, peripheral lymph nodes, and spleen. Although CD4+ T lymphocytes slowly returned to the peripheral blood, peripheral lymph nodes, and spleen by day 21 post-treatment, the numbers of CD4+ T lymphocytes in depleted calves remained below pre-depletion levels for the duration of the study. CD4+ T lymphocytes failed to be effectively depleted from a non-thymectomized calf treated with the mAb ILA-11. Development of a T lymphocyte depletion model in thymectomized calves will permit testing of the hypothesis that CD4+ T lymphocytes and IFN-gamma are required in cattle for control of acute anaplasmosis. In subsequent planned studies, thymectomized calves depleted of CD4+ T lymphocytes will be experimentally infected with A. marginale and parameters of disease compared between depleted and non-depleted calves.
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Affiliation(s)
- R A Valdez
- United States Department of Agriculture, Agricultural Research Service, Animal Disease Research Unit, P.O. Box 646630, Pullman, WA 99164-6630, USA.
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Brown WC, McGuire TC, Zhu D, Lewin HA, Sosnow J, Palmer GH. Highly conserved regions of the immunodominant major surface protein 2 of the genogroup II ehrlichial pathogen Anaplasma marginale are rich in naturally derived CD4+ T lymphocyte epitopes that elicit strong recall responses. J Immunol 2001; 166:1114-24. [PMID: 11145692 DOI: 10.4049/jimmunol.166.2.1114] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Genogroup II ehrlichia, including the agent of human granulocytic ehrlichiosis, Ehrlichia phagocytophila, and the bovine pathogen Anaplasma marginale, express a markedly immunodominant outer membrane protein designated major surface protein 2 (MSP2). MSP2 is encoded by a multigene family, resulting in the expression of variant B cell epitopes. MSP2 variants are sequentially expressed in the repeated cycles of rickettsemia that characterize persistent A. marginale infection and control of each rickettsemic cycle is associated with development of a variant-specific IgG response. Importantly, these persistent rickettsemic cycles are controlled at levels 100-1000 times lower than those responsible for clinical disease during acute infection. Control of rickettsemia during persistence could result from an anamnestic Th lymphocyte response to conserved regions of MSP2 that enhances the primary Ab response against newly emergent variants. Comparison of MSP2 variants reveals conserved N and C termini flanking the central, surface-exposed hypervariable region that represents the variant B lymphocyte epitopes. We demonstrate MSP2-specific CD4(+) T lymphocyte recognition of epitopes common to several strains of A. marginale and the related pathogen A. ovis. Furthermore, T lymphocyte lines from three individuals identified six to nine overlapping peptides representing a minimum of four to seven dominant or subdominant epitopes in these conserved N and C termini. Immunodominant peptides induced high levels of IFN-gamma, a cytokine associated with protection against ehrlichia and needed for rapid generation of variant-specific IgG2. The presented data support the potential importance of a strong Th lymphocyte response to invariant MSP2 epitopes in controlling rickettsemia during persistent infection to subclinical levels.
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Affiliation(s)
- W C Brown
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA 99164, USA.
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Mwangi W, Brown WC, Palmer GH. Identification of fetal liver tyrosine kinase 3 (flt3) ligand domain required for receptor binding and function using naturally occurring ligand isoforms. J Immunol 2000; 165:6966-74. [PMID: 11120823 DOI: 10.4049/jimmunol.165.12.6966] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
We used a comparative approach to identify the fetal liver tyrosine kinase 3 (flt3) ligand structure required for binding and function. Two conserved bovine flt3 ligand isoforms, which differ in a defined region within the extracellular domain, were identified and shown to be uniformly transcribed in individuals with diverse MHC haplotypes. Notably, at the amino acid level, the extracellular domain of the bovine flt3 ligand isoform 1 is 81 and 72% identical with the extracellular domains of the human and murine flt3 ligands, respectively, whereas isoform-2 has a deletion within this domain. Bovine flt3 ligand isoform 1, but not 2, bound the human flt3 receptor and stimulated murine pro B cells transfected with the murine flt3 receptor. This retention of binding and function allowed definition of key residues by identifying sequences conserved among species. We have shown that a highly conserved, 18 aa sequence within the flt3 ligand extracellular domain is required for flt3 receptor binding and function. However, a peptide representing this sequence is insufficient for receptor binding as demonstrated by its failure to inhibit the bovine flt3 ligand isoform 1 binding to the human flt3 receptor. The requirement for flanking structure was confirmed by testing bovine flt3 ligand isoform 1 constructs truncated at specific residues outside the 18 aa sequence. Overall, the flt3 ligand structure required for function is markedly similar to that of the related hemopoietic growth factors, CSF-1 and steel factor. This definition of the required flt3 ligand structure will facilitate development of agonists to enhance dendritic cell recruitment for vaccines and immunotherapy.
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Affiliation(s)
- W Mwangi
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, WA 99164, USA.
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31
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Suarez CE, Florin-Christensen M, Hines SA, Palmer GH, Brown WC, McElwain TF. Characterization of allelic variation in the Babesia bovis merozoite surface antigen 1 (MSA-1) locus and identification of a cross-reactive inhibition-sensitive MSA-1 epitope. Infect Immun 2000; 68:6865-70. [PMID: 11083806 PMCID: PMC97791 DOI: 10.1128/iai.68.12.6865-6870.2000] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The Babesia bovis merozoite surface antigen 1 (MSA-1), a member of the variable merozoite surface antigen (VMSA) family, is an immunodominant glycoprotein which elicits antibodies that inhibit erythrocyte invasion. While antigenic polymorphism is a general feature of vmsa genes, the molecular basis and extent of msa-1 sequence polymorphism have not been well characterized. In this study we defined the msa-1 locus in the biologically cloned Mexico Mo7 strain of B. bovis and identified the sequence differences between MSA-1 antigenically dissimilar strains. We then determined whether sequences conserved between distinct msa-1 alleles would induce cross-reactive CD4(+) T lymphocytes or inhibitory antibodies. The msa-1 locus in Mo7 contains a single msa-1 gene flanked by transcribed genes with no sequence homology to members of the VMSA gene family. Argentina B. bovis strains R1A and S2P have msa-1 genes with amino acid sequences that are 98.8% identical to each other, and antibodies against S2P MSA-1 cross-react with native R1A MSA-1. In contrast, identity between the Argentina and Mexico Mo7 msa-1 alleles is only 52%, with no continuous stretch of identity longer than 16 amino acids. Despite limited sequence conservation, antibodies against R1A MSA-1 were able to inhibit invasion of erythrocytes by Mo7 merozoites. The results indicate that inhibition-sensitive epitopes are conserved despite significant sequence divergence between Mexico and Argentina strain alleles and support a conserved functional role for polymorphic MSA-1 in erythrocyte invasion.
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Affiliation(s)
- C E Suarez
- Program in Vector-Borne Diseases, Animal Disease Research Unit, Agricultural Research Service, U.S. Department of Agriculture, Washington 99164, USA.
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Shoda LK, Palmer GH, Florin-Christensen J, Florin-Christensen M, Godson DL, Brown WC. Babesia bovis-stimulated macrophages express interleukin-1beta, interleukin-12, tumor necrosis factor alpha, and nitric oxide and inhibit parasite replication in vitro. Infect Immun 2000; 68:5139-45. [PMID: 10948137 PMCID: PMC101760 DOI: 10.1128/iai.68.9.5139-5145.2000] [Citation(s) in RCA: 86] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The tick-transmitted hemoparasite Babesia bovis causes an acute infection that results in persistence and immunity against challenge infection in cattle that control the initial parasitemia. Resolution of acute infection with this protozoal pathogen is believed to be dependent on products of activated macrophages (Mphi), including inflammatory cytokines and nitric oxide (NO) and its derivatives. B. bovis stimulates inducible nitric oxide synthase (iNOS) and production of NO in bovine Mphi, and chemical donors of NO inhibit the growth of B. bovis in vitro. However, the induction of inflammatory cytokines in Mphi by babesial parasites has not been described, and the antiparasitic activity of NO produced by B. bovis-stimulated Mphi has not been definitively demonstrated. We report that monocyte-derived Mphi activated by B. bovis expressed enhanced levels of inflammatory cytokines interleukin-1beta (IL-1beta), IL-12, and tumor necrosis factor alpha that are important for stimulating innate and acquired immunity against protozoal pathogens. Furthermore, a lipid fraction of B. bovis-infected erythrocytes stimulated iNOS expression and NO production by Mphi. Cocultures of Mphi and B. bovis-infected erythrocytes either in contact or physically separated resulted in reduced parasite viability. However, NO produced by bovine Mphi in response to B. bovis-infected erythrocytes was only partially responsible for parasite growth inhibition, suggesting that additional factors contribute to the inhibition of B. bovis replication. These findings demonstrate that B. bovis induces an innate immune response that is capable of controlling parasite replication and that could potentially result in host survival and parasite persistence.
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Affiliation(s)
- L K Shoda
- Program in Vector-Borne Diseases, Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, Washington 99164-7040, USA
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Ruef BJ, Ward TJ, Oxner CR, Conley PG, Brown WC, Rice-Ficht AC. Phylogenetic analysis with newly characterized Babesia bovis hsp70 and hsp90 provides strong support for paraphyly within the piroplasms. Mol Biochem Parasitol 2000; 109:67-72. [PMID: 10924758 DOI: 10.1016/s0166-6851(00)00230-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- B J Ruef
- Department oe Medical Biochemistry and Genetics, Texas A&M University, College Station 77843-1114, USA.
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Camacho-Nuez M, de Lourdes Muñoz M, Suarez CE, McGuire TC, Brown WC, Palmer GH. Expression of polymorphic msp1beta genes during acute anaplasma Marginale rickettsemia. Infect Immun 2000; 68:1946-52. [PMID: 10722587 PMCID: PMC97371 DOI: 10.1128/iai.68.4.1946-1952.2000] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Immunization of cattle with native MSP1 induces protection against Anaplasma marginale. The native immunogen is composed of a single MSP1a protein and multiple, undefined MSP1b polypeptides. In addition to the originally sequenced gene, designated msp1beta(F1), we identified three complete msp1beta genes in the Florida strain: msp1beta(F2), msp1beta(F3), and msp1beta(F4). Each of these polymorphic genes encodes a structurally unique MSP1b protein, and unique transcripts can be identified during acute A. marginale rickettsemia. The structural polymorphism is clustered in discrete variable regions, and each MSP1b protein results from a unique mosaic of five variable regions. Although each of the MSP1b proteins in the Florida strain contains epitopes recognized by serum antibody induced by protective immunization with the native MSP1 complex, the variable regions also include epitopes expressed by some but not all of the MSP1b proteins. These data support testing recombinant vaccines composed of the multiple antigenically and structurally unique MSP1b proteins combined with MSP1a in order to mimic the efficacy of native MSP1 immunization.
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Affiliation(s)
- M Camacho-Nuez
- Departamento de Genética y Biología Molecular, CINVESTAV-IPN, D.F. 07000, Mexico
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Abstract
Tick-borne transmission of ehrlichial pathogens requires rickettsemic reservoir hosts to maintain a population of infected vectors. Persistence in their respective mammalian hosts appears to be a common feature of the tick-transmitted ehrlichiae. How infection persists in immunocompetent hosts is unknown. In this review, we describe studies on Anaplasma marginale, an ehrlichial pathogen of cattle, that support antigenic variation as a primary mechanism of persistence.
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Affiliation(s)
- G H Palmer
- Program in Vector-Borne Diseases, Washington State University, Pullman, WA 99164-7040, USA
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Van Kleef M, Gunter NJ, Macmillan H, Allsopp BA, Shkap V, Brown WC. Identification of Cowdria ruminantium antigens that stimulate proliferation of lymphocytes from cattle immunized by infection and treatment or with inactivated organisms. Infect Immun 2000; 68:603-14. [PMID: 10639423 PMCID: PMC97182 DOI: 10.1128/iai.68.2.603-614.2000] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Cowdria ruminantium is an obligate intracellular pathogen that causes heartwater in ruminants. Several findings suggest that T cells play an important role in protection against the disease. In order to identify which proteins are involved in T-cell immunity, C. ruminantium proteins were fractionated by continuous-flow electrophoresis and tested for their ability to stimulate lymphocyte proliferation in vitro. C. ruminantium-infected endothelial cell lysates were fractionated at between 11 and 38 kDa and 50 and 168 kDa on 15 and 7% acrylamide gels, respectively. In an attempt to stimulate the natural infective process, peripheral blood mononuclear cells (PBMC) were obtained from two cattle rendered immune by infection and treatment and assayed in proliferation assays with fractionated proteins. In a parallel study, four cattle were immunized with inactivated C. ruminantium to determine whether their lymphocytes also responded to fractionated proteins. Proliferation assays after immunization by infection and treatment detected no C. ruminantium-specific proliferation in vitro after one vaccination. Proliferation was observed, however, between 1 and 4 weeks after challenge. This was followed by a period of no detectable response, after which the response reappeared. PBMC from animals immunized with inactivated organisms proliferated specifically in response to antigen soon after the first immunization. Only C. ruminantium proteins with low molecular masses of 11, 12, 14 to 17, and 19 to 23 kDa induced proliferative responses by lymphocytes from all six animals. These protein fractions may have potential as vaccine antigens.
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Affiliation(s)
- M Van Kleef
- Department of Immunology, Onderstepoort Veterinary Institute, Onderstepoort, Republic of South Africa.
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37
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Ruef BJ, Dowling SC, Conley PG, Perryman LE, Brown WC, Jasmer DP, Rice-Ficht AC. A unique Babesia bovis spherical body protein is conserved among geographic isolates and localizes to the infected erythrocyte membrane. Mol Biochem Parasitol 2000; 105:1-12. [PMID: 10613694 DOI: 10.1016/s0166-6851(99)00167-x] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Using monoclonal antibody (mAb) 70/52.9, generated from a Babesia bovis fraction enriched for spherical body organelles, we have identified a 135-kDa protein containing an epitope conserved in B. bovis strains from Texas, Mexico, and Australia. The protein was localized to the spherical bodies of the babesial apical complex and was designated spherical body protein 3 (SBP3), according to the established nomenclature. Immunofluorescence studies showed binding of the 70/52.9 mAb to the infected-erythrocyte membrane region but not to their uninfected counterparts, demonstrating a host-cell association shared with the previously isolated B. bovis spherical body proteins, SBP1 and SBP2. Using mAb 70/52.9, the full-length cDNA encoding SBP3 was isolated from an expression library, sequenced, and oligonucleotide primers synthesized to amplify the genomic copy by polymerase chain reaction. The genomic copy contained no introns and was identical to the cDNA sequence with each containing a single, large open reading frame encoding a protein of 1089 residues. Analysis of the SBP3 amino acid sequence revealed no significant amino acid identity to SBP1 and SBP2 and a lack of repeated epitopes, a notable feature of the other two spherical body proteins. Labeled probes derived from the coding region of SBP3 hybridized to single fragments on Southern blots containing B. bovis genomic DNA indicating a single copy gene. With the identification of this third spherical body protein, which associates with the cytoplasmic face of the infected-erythrocyte membrane, a complement of distinct B. bovis proteins have been identified that are likely to contribute to intracellular survival, growth, and development for this parasite. The encoded protein should be valuable for functional investigations and evaluation of potential targets for host immunity.
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Affiliation(s)
- B J Ruef
- Department of Medical Biochemistry and Genetics, Texas A&M University, System Health Science Center, College Station 77843-1114, USA
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Allred DR, Carlton JM, Satcher RL, Long JA, Brown WC, Patterson PE, O'Connor RM, Stroup SE. The ves multigene family of B. bovis encodes components of rapid antigenic variation at the infected erythrocyte surface. Mol Cell 2000; 5:153-62. [PMID: 10678177 DOI: 10.1016/s1097-2765(00)80411-6] [Citation(s) in RCA: 77] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
B. bovis, an intraerythrocytic protozoal parasite, establishes chronic infections in cattle in part through rapid variation of the polymorphic, heterodimeric VESA1 protein on the infected erythrocyte surface and sequestration of mature parasites. We describe the characterization of the ves1 alpha gene encoding the VESA1a subunit, thus providing a description of a gene whose product is involved in rapid antigenic variation in a babesial parasite. This three-exon gene, a member of a multigene family (ves), encodes a polypeptide with no cleavable signal sequence, a single predicted transmembrane segment, and a cysteine/lysine-rich domain. Variation appears to involve creation and modification or loss of a novel, transcribed copy of the gene.
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Affiliation(s)
- D R Allred
- Department of Pathobiology, University of Florida, Gainesville 32611, USA.
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Tuo W, Palmer GH, McGuire TC, Zhu D, Brown WC. Interleukin-12 as an adjuvant promotes immunoglobulin G and type 1 cytokine recall responses to major surface protein 2 of the ehrlichial pathogen Anaplasma marginale. Infect Immun 2000; 68:270-80. [PMID: 10603398 PMCID: PMC97131 DOI: 10.1128/iai.68.1.270-280.2000] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Anaplasma marginale is a tick-transmitted pathogen of cattle closely related to the human ehrlichiae, Ehrlichia chaffeensis and the agent of human granulocytic ehrlichiosis (HGE). These pathogens have in common a structurally conserved outer membrane protein (OMP) designated the major surface protein 2 (MSP-2) in A. marginale and HGE and OMP-1 in E. chaffeensis. Protective immunity against ehrlichial pathogens is believed to require induction of gamma interferon (IFN-gamma) and opsonizing immunoglobulin (Ig) subclasses directed against OMP epitopes that, in concert, activate macrophages for phagocytosis and killing. Because interleukin-12 (IL-12) acts as an adjuvant for protein immunization to induce IFN-gamma and protective immunity against intracellular pathogens, we hypothesized that as an adjuvant with MSP-2, IL-12 would augment type 1 recall responses to A. marginale. IL-12 was coadsorbed with MSP-2 to alum and shown to significantly enhance IFN-gamma production by lymph node cells (LNC) and LNC-derived CD4(+) T-cell lines from immunized calves following recall stimulation with A. marginale. LNC proliferation and IL-2 production were also enhanced in IL-12-treated calves. Elevated recall proliferative responses by peripheral blood mononuclear cells were still evident 9 months after immunization. Serum IgG levels were consistently increased in IL-12 immunized calves, predominantly due to higher IgG1 responses. The results support the use of IL-12 coadsorbed with OMP of ehrlichial pathogens in alum to amplify both antibody and type-1 cytokine responses important for protective immunity.
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Affiliation(s)
- W Tuo
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman, Washington 99164-7040, USA
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40
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Abstract
IL-4 and IL-13 share a wide range of activities on monocytes, epithelial cells and B cells and thus play an important role in host defense. Many of these activities are not conserved among species as human, but not murine, B cells are thought to be responsive to IL-13. We previously demonstrated that human IL-13 is highly conserved at the nucleic acid level with a candidate bovine IL-13 cDNA homologue. Moreover, recombinant human IL-13 stimulates Ig secretion by appropriately activated bovine B cells. These studies have been extended to examining Ig class switching at both the protein and mRNA levels in addition to examining other markers of cellular activation. Our results suggest that IL-13 influences B cell differentiation by enhancing IgM, IgG1, and IgE production. IL-13 stimulation alone increases MHC class II expression and progression through cell cycle, although at lower levels in comparison to rboIL-4. The biology of the receptors for IL-4 and IL-13 is complex and raises several key questions with regard to IL-4-dependent and -independent mechanisms of host immunomodulation. Recent studies suggest that at least four chains are involved. These include the p140 IL-4 binding chain (IL-4Ralpha), the common gamma chain (gammac chain), IL-13 receptor alpha- chain (IL-13Ralpha-1) and the IL-13 receptor alpha-2 chain (IL-13Ralpha-2). We have recently cloned cDNAs for the bovine homologues of the IL-13Ralpha-1 and IL-4Ralpha chains and evaluated mRNA expression for a variety of cell types following stimulation. The expression patterns and their implications for receptor chain utilization in signaling via these key TH2 signature cytokines will be discussed.
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Affiliation(s)
- W L Trigona
- University of Missouri, College of Veterinary Medicine, Department of Veterinary Pathobiology, Columbia 65211, USA
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41
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Abstract
The pathology caused by acute Babesia bovis infection is similar to that seen in severe human malaria caused by Plasmodium falciparum infection, which is related to dysregulated production of inflammatory cytokines and nitric oxide (NO). We have observed induction of NO, inducible nitric oxide synthase (iNOS) and inflammatory cytokines in macrophages by B. bovis. Furthermore, proliferation of lymphocytes from individuals never exposed to certain protozoal pathogens can be induced by crude protozoal parasite extracts. We have repeatedly observed stimulation of naive PBMC from cattle to antigenic extracts of Babesia bovis. Based on recent studies demonstrating the mitogenicity of bacterial and other non-vertebrate DNAs for murine B cells and macrophages, the mitogenic properties of B. bovis DNA were examined. B. bovis and E. coli DNAs induced proliferation of PBMC and purified B cells from non-exposed cattle. Stimulatory activity was reduced by DNase treatment and methylation with CpG methylase, indicating the presence of stimulatory non-methylated CpG motifs in the B. bovis genome. B. bovis and E. coli DNAs enhanced IgG secretion by cultured B cells, stimulating IgG1 and more strongly, IgG2. Several hexameric CpG immunostimulatory sequences (ISS) active for murine B cells were identified in an 11 kb fragment of B. bovis DNA. An oligodeoxyribonucleotide containing one of these (AACGTT), located in the rhoptry associated protein-1 (rap-1) open reading frame, stimulated B cell proliferation. These studies identify a potential mechanism by which protozoal parasites may modulate host immune responses, leading to consequences such as hypergammaglobulinemia and splenomegaly. These results also support the use of ISS as vaccine adjuvants to enhance Type 1 immune responses in cattle.
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Affiliation(s)
- W C Brown
- Washington State University, Department of Veterinary Microbiology and Pathology, Pullman 99164-7040, USA.
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42
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Abstract
Interleukin-13 (IL-13) is produced predominantly by helper T lymphocytes of the Th2 phenotype and mediates its effects on several immune cells, including B lymphocytes and macrophages, stimulating their proliferation, differentiation, and effector functions. IL-13 activates human B cells but has no detectable activity on murine B lymphocytes, suggesting that the activity of IL-13 varies among species. Our studies show that IL-13 enhances proliferation and differentiation of bovine B cells and upregulates cell surface major histocompatibility complex (MHC) class II expression. We examined mRNA expression of the putative signaling component of the bovine IL-13Ralpha1 homolog in several peripheral blood populations. After stimulation with calcium ionophore and phorbol ester, IL-13Ralpha1 mRNA levels appeared to be downmodulated in T cells, upregulated in macrophages and B cells, and unchanged in neutrophils. Together, these studies begin to provide insight into the relative importance of IL-13 in immunoregulation in cattle.
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Affiliation(s)
- W L Trigona
- University of Missouri-Columbia, Department of Veterinary Pathobiology, 65211, USA
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Abstract
Anaplasma marginale is an ehrlichial pathogen of cattle, in the order Rickettsiales, that establishes persistent cyclic rickettsemia in the infected host. Within each rickettsemic cycle, A. marginale expressing antigenically variant major surface protein 2 (MSP2) emerge. By cloning 17 full-length msp2 transcripts expressed during cyclic rickettsemia, we determined that emergent variants have a single, central hypervariable region encoding variant B-cell epitopes. The N- and C-terminal regions are highly conserved among the expressed A. marginale variants, and similar sequences define the MSP2 homologues in the agent of human granulocytic ehrlichiosis (HGE). This is in contrast to the MSP2 homologues in ehrlichial genogroup I pathogens, Ehrlichia chaffeensis, Ehrlichia canis, and Cowdria ruminantium, that have multiple hypervariable regions. By defining the variable and conserved regions, we were able to show that the single hypervariable region of A. marginale MSP2 encodes epitopes that are immunogenic and induce variant-specific antibody responses during persistent infection. These findings demonstrate that the MSP2 structural variants that emerge during each cycle of persistent rickettsemia are true antigenic variants, consistent with MSP2 antigenic variation as a mechanism of A. marginale persistence.
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Affiliation(s)
- D M French
- Program in Vector-Borne Diseases, Department of Veterinary Microbiology, Washington State University, Pullman, Washington 99164-7040, USA
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Shoda LK, Zarlenga DS, Hirano A, Brown WC. Cloning of a cDNA encoding bovine interleukin-18 and analysis of IL-18 expression in macrophages and its IFN-gamma-inducing activity. J Interferon Cytokine Res 1999; 19:1169-77. [PMID: 10547157 DOI: 10.1089/107999099313118] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Interleukin-18 (IL-18) is a recently described cytokine that enhances interferon-gamma (IFN-gamma) production, either independently or synergistically with IL-12. These properties identify IL-18 as an immunoregulatory cytokine that may be pivotal in host defense against intracellular pathogens. We have isolated and sequenced a cDNA encoding bovine IL-18. The open reading frame (ORF) is 582 bp in length, encoding a predicted 192 amino acid (aa) precursor protein. Multiple sequence alignment demonstrated that bovine IL-18 has 65% and 78% identity with the predicted amino acid sequences of murine and human IL-18, respectively. IL-18 mRNA was constitutively present in bovine peripheral blood monocyte-derived macrophages (MDM), with no upregulation on stimulation with lipopolysaccharide (LPS). IL-18 transcripts were weakly detected in B lymphocytes but inducible in the B cell line BL-3. Human recombinant IL-18 (rHuIL-18) induced IFN-gamma production by PHA-stimulated peripheral blood mononuclear cells (PBMC), which was potentiated by rHuIL-12. Further, rHuIL-12 and rHuIL-18 enhanced proliferation of untreated PBMC. Antigen-specific T cell lines demonstrated IL-18-dependent enhancement of IFN-gamma production, indicating that bovine T cells are one of the leukocyte subsets that respond to IL-18. Analysis of IL-18 expression and its ability to induce IFN-gamma production by bovine lymphocytes are important considerations for understanding mechanisms of protective immunity and designing vaccines for intracellular pathogens.
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Affiliation(s)
- L K Shoda
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman 99164-7040, USA
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Abstract
The tick-transmitted apicomplexan parasites Babesia bovis and B. bigemina cause significant disease in cattle in many tropical and temperate areas of the world. These parasites present a challenge for vaccine development, and yet provide a system for studying the pathogenesis, mechanisms of protective immunity and regulation of host immune responses associated with intraerythrocytic protozoan parasites in a non-rodent species. In this article, Wendy Brown and Guy Palmer review strategies for identifying candidate vaccine antigens of B. bovis and B. bigemina and for priming immune responses to evoke strain crossprotective immunity.
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Affiliation(s)
- W C Brown
- Program in Vector-borne Diseases, Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, WA 99164, USA.
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Arulkanthan A, Brown WC, McGuire TC, Knowles DP. Biased immunoglobulin G1 isotype responses induced in cattle with DNA expressing msp1a of Anaplasma marginale. Infect Immun 1999; 67:3481-7. [PMID: 10377129 PMCID: PMC116534 DOI: 10.1128/iai.67.7.3481-3487.1999] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Immunization with the native major surface protein 1 (MSP1) (a heterodimer containing disulfide and noncovalently bonded polypeptides designated MSP1a and MSP1b) of the erythrocytic stage of Anaplasma marginale conferred protection against homologous challenge (G. H. Palmer, A. F. Barbet, W. C. Davis, and T. C. McGuire, Science 231:1299-1302, 1986). The MSP1a polypeptide possesses a conserved neutralization-sensitive epitope. In the present study, the immune response to DNA-mediated immunization using msp1a was studied. The plasmid pVCL/MSP1a, which encodes the complete msp1a gene of A. marginale under the control of human cytomegalovirus immediate-early enhancer/promoter and intron A, was constructed. The immune responses elicited by immunization with pVCL/MSP1a into cardiotoxin-induced regenerating muscle were evaluated in mice and cattle. Antibody reactive with native MSP1a was detected in pooled sera of immunized BALB/c mice 3 weeks following primary immunization. Two calves seronegative for A. marginale were immunized four times, at weeks 0, 3, 7, and 13, with pVCL/MSP1a. By 8 weeks, both calves responded to MSP1a with an antibody titer of 1:100, which peaked at 1:1,600 and 1:800 by 16 weeks after the initial immunization. Interestingly, immunoblotting with anti-immunoglobulin G1 (anti-IgG1) and anti-IgG2 specific monoclonal antibodies revealed a restricted IgG1 anti-MSP1a response in both animals. T-lymphocyte lines, established after the fourth immunization, proliferated specifically against A. marginale homogenate and purified MSP1 in a dose-dependent manner. These data provide a basis for an immunization strategy to direct bovine immune responses by using DNA vaccine vectors containing single or multiple genes encoding major surface proteins of A. marginale.
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Affiliation(s)
- A Arulkanthan
- Program in Vector-Borne Diseases, Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman, Washington 99164, USA
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47
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Tuo W, Estes DM, Brown WC. Comparative effects of interleukin-12 and interleukin-4 on cytokine responses by antigen-stimulated memory CD4+ T cells of cattle: IL-12 enhances IFN-gamma production, whereas IL-4 has marginal effects on cytokine expression. J Interferon Cytokine Res 1999; 19:741-9. [PMID: 10454344 DOI: 10.1089/107999099313587] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Interleukin-12 (IL-12) and IL-4 are important immunoregulatory cytokines that determine the fate of naive T cells during antigen priming in mice and also influence cytokine synthesis by differentiated murine and human T cells. The roles of these cytokines in regulating the differentiation and effector function of bovine T cells are less well studied. We investigated the ability of human IL-12 and bovine IL-4 to modify cytokine expression by antigen-stimulated T cells from cattle immune to the protozoal parasites Babesia bovis and Babesia bigemina or reactive with Mycobacterium bovis purified protein derivative. Peripheral blood mononuclear cells (PBMC) were cultured with specific antigen and IL-4 or IL-12 for 1 week. Then viable lymphoblasts consisting of predominantly CD4+ T cells were restimulated with antigen and antigen-presenting cells (APC) with or without cytokine. Cell lines were cultured for several weeks, and following restimulation with antigen and APC in the absence of exogenous cytokine, the cell lines were analyzed for proliferation, interferon-gamma (IFN-gamma) production, and expression of IL-2, IL4-, IL-10, or IFN-gamma transcript levels using a quantitative competitive RT-PCR. IL-12 and IL-4 had no effect on the composition of CD4, CD8, or gammadelta T cells in the cell lines or on the level of antigen-induced proliferation. IL-12 stimulated enhanced levels of IFN-gamma protein and transcript expression in all cell lines, with no consistent effects on IL-2 or IL-4 expression. In two B. bovis-specific cell lines, IL-12 suppressed IL-10 expression. IL-4 had no consistent effect on expression of any cytokine. These results indicate the use of IL-12 as an adjuvant to enhance type 1 cytokine responses in cattle during antigen priming.
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Affiliation(s)
- W Tuo
- Department of Veterinary Microbiology and Pathology, College of Veterinary Medicine, Washington State University, Pullman 99164, USA
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48
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Palmer GH, Rurangirwa FR, Kocan KM, Brown WC. Molecular basis for vaccine development against the ehrlichial pathogen Anaplasma marginale. Parasitol Today 1999; 15:281-6. [PMID: 10377531 DOI: 10.1016/s0169-4758(99)01469-6] [Citation(s) in RCA: 94] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Anaplasma marginale is a tick-transmitted ehrlichial pathogen causing severe morbidity and mortality in livestock on six continents. Development of safe effective vaccines would be greatly facilitated by identification of the protective immune mechanisms and by understanding how the pathogen evades immune effectors to establish persistent infection. In this article, Guy Palmer and colleagues review recent progress in identifying how defined epitopes induce protective immunity and the role of antigenic variation in these epitopes as a mechanism of persistence.
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Affiliation(s)
- G H Palmer
- Program in Vector-borne Diseases, Washington State University, Pullman, WA 99164-7040, USA.
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49
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Abstract
Fasciolosis is an economically significant disease of ruminants, caused by infection with the digenetic trematodes, Fasciola hepatica and F. gigantica. Some vaccination trials using irradiated metacercariae or isolated proteins have been shown to afford significant protection. However, the mechanisms of specific immunity against this pathogen have not been elucidated. We have identified thioredoxin, a tegument antigen of F. hepatica, among several proteins that are common to both the juvenile and adult fluke within the mammalian host and have undertaken studies to characterize bovine T cell responses to recombinant thioredoxin protein (FH 2020). Peripheral blood mononuclear cells from immune cattle proliferated specifically to crude F. hepatica antigenic extract but not to FH 2020. However, after repeated stimulation of lymphocytes by alternating crude extract and FH 2020, FH 2020-specific proliferation by T cell lines was observed. T cell clones were subsequently generated and found to respond specifically but weakly to both crude antigen and FH 2020. Thioredoxin appears to be only weakly antigenic for bovine T cells and is, therefore, an unpromising candidate for inducing resistance to F. hepatica.
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Affiliation(s)
- L K Shoda
- Department of Veterinary Microbiology and Pathology, Washington State University, Pullman 99164-7040, USA
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Tuo W, MacMillan H, Günter N, Bazer FW, Brown WC. Upregulation of interleukin-4 and IFN-gamma expression by IFN-tau, a member of the type I IFN family. J Interferon Cytokine Res 1999; 19:179-87. [PMID: 10090403 DOI: 10.1089/107999099314324] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Trophoblast interferon-tau (IFN-tau) is a new member of the type I IFN family that is produced in large quantities by the ruminant conceptus. Like other type I IFN, IFN-tau inhibits viral replication and activates natural killer (NK)-mediated cytotoxicity. In mice and humans, type I IFN enhances type 1 T helper (Th) cell responses, but the effects of type I IFN, including IFN-tau, on cytokine expression by bovine Th cells have not been described. The present study determined the effects of IFN-tau on interleukin-4 (IL-4), IFN-gamma, and IL-10 expression by antigen-specific, CD4+ T cell lines derived from cattle immune to either Babesia bovis, Babesia bigemina rhoptry-associated protein-1, or Anaplasma marginale. IFN-tau upregulated IFN-gamma secretion and steady-state levels of IFN-gamma and IL-4 mRNA by cell lines cultured for 3-6 weeks. In contrast, the steady-state levels of IL-10 mRNA were either not changed or inhibited at these times. Similar effects were obtained with human IFN-alpha. Comparison of the quantities of IFN-gamma, IL-4, and IL-10 transcripts in IFN-tau-treated or IFN-alpha-treated cultures revealed that even though IFN-gamma was the predominant cytokine expressed by all T cell lines, both IFN-gamma and IL-4 steady-state transcript levels were upregulated by a comparable degree. Thus, these studies demonstrate that IFN-tau is an immunomodulatory cytokine that promotes enhanced IL-4 and IFN-gamma responses by effector T cells but not, strictly speaking, Thl-biased responses in cattle. These results indicate the potential use of this cytokine as an adjuvant in ruminants to boost cell-mediated immune responses.
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Affiliation(s)
- W Tuo
- Department of Veterinary Pathology and Microbiology, Washington State University, Pullman 99164, USA
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