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Aliberti R, Ambrosino F, Ammendola R, Angelucci B, Antonelli A, Anzivino G, Arcidiacono R, Bache T, Baeva A, Baigarashev D, Barbanera M, Bernhard J, Biagioni A, Bician L, Biino C, Bizzeti A, Blazek T, Bloch-Devaux B, Bonaiuto V, Boretto M, Bragadireanu AM, Britton D, Brizioli F, Brunetti MB, Bryman D, Bucci F, Capussela T, Carmignani J, Ceccucci A, Cenci P, Cerny V, Cerri C, Checcucci B, Conovaloff A, Cooper P, Cortina Gil E, Corvino M, Costantini F, Cotta Ramusino A, Coward D, D'Agostini G, Dainton JB, Dalpiaz P, Danielsson H, De Simone N, Di Filippo D, Di Lella L, Doble N, Duk V, Duval F, Döbrich B, Emelyanov D, Engelfried J, Enik T, Estrada-Tristan N, Falaleev V, Fantechi R, Fascianelli V, Federici L, Fedotov S, Filippi A, Fiorini M, Fry JR, Fu J, Fucci A, Fulton L, Gamberini E, Gatignon L, Georgiev G, Ghinescu SA, Gianoli A, Giorgi M, Giudici S, Gonnella F, Goudzovski E, Graham C, Guida R, Gushchin E, Hahn F, Heath H, Henshaw J, Holzer EB, Husek T, Hutanu OE, Hutchcroft D, Iacobuzio L, Iacopini E, Imbergamo E, Jenninger B, Jerhot J, Jones RWL, Kampf K, Kekelidze V, Kholodenko S, Khoriauli G, Khotyantsev A, Kleimenova A, Korotkova A, Koval M, Kozhuharov V, Kucerova Z, Kudenko Y, Kunze J, Kurochka V, Kurshetsov V, Lamanna G, Lanfranchi G, Lari E, Latino G, Laycock P, Lazzeroni C, Lehmann Miotto G, Lenti M, Leonardi E, Lichard P, Litov L, Lollini R, Lomidze D, Lonardo A, Lubrano P, Lupi M, Lurkin N, Madigozhin D, Mannelli I, Mapelli A, Marchetto F, Marchevski R, Martellotti S, Massarotti P, Massri K, Maurice E, Medvedeva M, Mefodev A, Menichetti E, Migliore E, Minucci E, Mirra M, Misheva M, Molokanova N, Moulson M, Movchan S, Napolitano M, Neri I, Newson F, Norton A, Noy M, Numao T, Obraztsov V, Ostankov A, Padolski S, Page R, Palladino V, Parenti A, Parkinson C, Pedreschi E, Pepe M, Perrin-Terrin M, Peruzzo L, Petrov P, Petrov Y, Petrucci F, Piandani R, Piccini M, Pinzino J, Polenkevich I, Pontisso L, Potrebenikov Y, Protopopescu D, Raggi M, Romano A, Rubin P, Ruggiero G, Ryjov V, Salamon A, Santoni C, Saracino G, Sargeni F, Schuchmann S, Semenov V, Sergi A, Shaikhiev A, Shkarovskiy S, Soldi D, Sozzi M, Spadaro T, Spinella F, Sturgess A, Sugonyaev V, Swallow J, Trilov S, Valente P, Velghe B, Venditti S, Vicini P, Volpe R, Vormstein M, Wahl H, Wanke R, Wrona B, Yushchenko O, Zamkovsky M, Zinchenko A. Search for Lepton Number and Flavor Violation in K^{+} and π^{0} Decays. Phys Rev Lett 2021; 127:131802. [PMID: 34623867 DOI: 10.1103/physrevlett.127.131802] [Citation(s) in RCA: 1] [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: 05/17/2021] [Accepted: 07/22/2021] [Indexed: 06/13/2023]
Abstract
Searches for the lepton number violating K^{+}→π^{-}μ^{+}e^{+} decay and the lepton flavor violating K^{+}→π^{+}μ^{-}e^{+} and π^{0}→μ^{-}e^{+} decays are reported using data collected by the NA62 experiment at CERN in 2017-2018. No evidence for these decays is found and upper limits of the branching ratios are obtained at 90% confidence level: B(K^{+}→π^{-}μ^{+}e^{+})<4.2×10^{-11}, B(K^{+}→π^{+}μ^{-}e^{+})<6.6×10^{-11} and B(π^{0}→μ^{-}e^{+})<3.2×10^{-10}. These results improve by 1 order of magnitude over previous results for these decay modes.
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Affiliation(s)
- R Aliberti
- Institut für Physik and PRISMA Cluster of Excellence, Universität Mainz, D-55099 Mainz, Germany
| | - F Ambrosino
- Dipartimento di Fisica "Ettore Pancini" e INFN, Sezione di Napoli, I-80126 Napoli, Italy
| | - R Ammendola
- INFN, Sezione di Roma Tor Vergata, I-00133 Roma, Italy
| | - B Angelucci
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - A Antonelli
- Laboratori Nazionali di Frascati, I-00044 Frascati, Italy
| | - G Anzivino
- Dipartimento di Fisica e Geologia dell'Università e INFN, Sezione di Perugia, I-06100 Perugia, Italy
| | - R Arcidiacono
- Dipartimento di Fisica dell'Università e INFN, Sezione di Torino, I-10125 Torino, Italy
| | - T Bache
- University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - A Baeva
- Joint Institute for Nuclear Research, 141980 Dubna (MO), Russia
| | - D Baigarashev
- Joint Institute for Nuclear Research, 141980 Dubna (MO), Russia
| | - M Barbanera
- INFN, Sezione di Perugia, I-06100 Perugia, Italy
| | - J Bernhard
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - A Biagioni
- INFN, Sezione di Roma I, I-00185 Roma, Italy
| | - L Bician
- Faculty of Mathematics, Physics and Informatics, Comenius University, 842 48 Bratislava, Slovakia
| | - C Biino
- INFN, Sezione di Torino, I-10125 Torino, Italy
| | - A Bizzeti
- INFN, Sezione di Firenze, I-50019 Sesto Fiorentino, Italy
| | - T Blazek
- Faculty of Mathematics, Physics and Informatics, Comenius University, 842 48 Bratislava, Slovakia
| | - B Bloch-Devaux
- Dipartimento di Fisica dell'Università e INFN, Sezione di Torino, I-10125 Torino, Italy
| | - V Bonaiuto
- INFN, Sezione di Roma Tor Vergata, I-00133 Roma, Italy
| | - M Boretto
- Dipartimento di Fisica dell'Università e INFN, Sezione di Torino, I-10125 Torino, Italy
| | - A M Bragadireanu
- Horia Hulubei National Institute of Physics for R&D in Physics and Nuclear Engineering, 077125 Bucharest-Magurele, Romania
| | - D Britton
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - F Brizioli
- Dipartimento di Fisica e Geologia dell'Università e INFN, Sezione di Perugia, I-06100 Perugia, Italy
| | - M B Brunetti
- University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - D Bryman
- University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - F Bucci
- INFN, Sezione di Firenze, I-50019 Sesto Fiorentino, Italy
| | - T Capussela
- Dipartimento di Fisica "Ettore Pancini" e INFN, Sezione di Napoli, I-80126 Napoli, Italy
| | - J Carmignani
- University of Lancaster, Lancaster LA1 4YW, United Kingdom
| | - A Ceccucci
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - P Cenci
- INFN, Sezione di Perugia, I-06100 Perugia, Italy
| | - V Cerny
- Faculty of Mathematics, Physics and Informatics, Comenius University, 842 48 Bratislava, Slovakia
| | - C Cerri
- INFN, Sezione di Pisa, I-56100 Pisa, Italy
| | - B Checcucci
- INFN, Sezione di Perugia, I-06100 Perugia, Italy
| | - A Conovaloff
- George Mason University, Fairfax, Virginia 22030, USA
| | - P Cooper
- George Mason University, Fairfax, Virginia 22030, USA
| | - E Cortina Gil
- Université Catholique de Louvain, B-1348 Louvain-La-Neuve, Belgium
| | - M Corvino
- Dipartimento di Fisica "Ettore Pancini" e INFN, Sezione di Napoli, I-80126 Napoli, Italy
| | - F Costantini
- Dipartimento di Fisica dell'Università e INFN, Sezione di Pisa, I-56100 Pisa, Italy
| | | | - D Coward
- George Mason University, Fairfax, Virginia 22030, USA
| | - G D'Agostini
- Dipartimento di Fisica, Sapienza Università di Roma e INFN, Sezione di Roma I, I-00185 Roma, Italy
| | - J B Dainton
- University of Lancaster, Lancaster LA1 4YW, United Kingdom
| | - P Dalpiaz
- Dipartimento di Fisica e Scienze della Terra dell'Università e INFN, Sezione di Ferrara, I-44122 Ferrara, Italy
| | - H Danielsson
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - N De Simone
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - D Di Filippo
- Dipartimento di Fisica "Ettore Pancini" e INFN, Sezione di Napoli, I-80126 Napoli, Italy
| | - L Di Lella
- Dipartimento di Fisica dell'Università e INFN, Sezione di Pisa, I-56100 Pisa, Italy
| | - N Doble
- Dipartimento di Fisica dell'Università e INFN, Sezione di Pisa, I-56100 Pisa, Italy
| | - V Duk
- University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - F Duval
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - B Döbrich
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - D Emelyanov
- Joint Institute for Nuclear Research, 141980 Dubna (MO), Russia
| | - J Engelfried
- Instituto de Física, Universidad Autónoma de San Luis Potosí, 78240 San Luis Potosí, Mexico
| | - T Enik
- Joint Institute for Nuclear Research, 141980 Dubna (MO), Russia
| | - N Estrada-Tristan
- Instituto de Física, Universidad Autónoma de San Luis Potosí, 78240 San Luis Potosí, Mexico
| | - V Falaleev
- Joint Institute for Nuclear Research, 141980 Dubna (MO), Russia
| | - R Fantechi
- INFN, Sezione di Pisa, I-56100 Pisa, Italy
| | - V Fascianelli
- University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - L Federici
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - S Fedotov
- Institute for Nuclear Research of the Russian Academy of Sciences, 117312 Moscow, Russia
| | - A Filippi
- INFN, Sezione di Torino, I-10125 Torino, Italy
| | - M Fiorini
- Dipartimento di Fisica e Scienze della Terra dell'Università e INFN, Sezione di Ferrara, I-44122 Ferrara, Italy
| | - J R Fry
- University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - J Fu
- University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada
| | - A Fucci
- INFN, Sezione di Roma Tor Vergata, I-00133 Roma, Italy
| | - L Fulton
- University of Liverpool, Liverpool L69 7ZE, United Kingdom
| | - E Gamberini
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - L Gatignon
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - G Georgiev
- Laboratori Nazionali di Frascati, I-00044 Frascati, Italy
| | - S A Ghinescu
- Horia Hulubei National Institute of Physics for R&D in Physics and Nuclear Engineering, 077125 Bucharest-Magurele, Romania
| | - A Gianoli
- INFN, Sezione di Ferrara, I-44122 Ferrara, Italy
| | - M Giorgi
- Dipartimento di Fisica dell'Università e INFN, Sezione di Pisa, I-56100 Pisa, Italy
| | - S Giudici
- Dipartimento di Fisica dell'Università e INFN, Sezione di Pisa, I-56100 Pisa, Italy
| | - F Gonnella
- University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - E Goudzovski
- University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - C Graham
- University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - R Guida
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - E Gushchin
- Institute for Nuclear Research of the Russian Academy of Sciences, 117312 Moscow, Russia
| | - F Hahn
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - H Heath
- University of Bristol, Bristol BS8 1TH, United Kingdom
| | - J Henshaw
- University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - E B Holzer
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - T Husek
- Charles University, 116 36 Prague 1, Czech Republic
| | - O E Hutanu
- Horia Hulubei National Institute of Physics for R&D in Physics and Nuclear Engineering, 077125 Bucharest-Magurele, Romania
| | - D Hutchcroft
- University of Liverpool, Liverpool L69 7ZE, United Kingdom
| | - L Iacobuzio
- University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - E Iacopini
- Dipartimento di Fisica e Astronomia dell'Università e INFN, Sezione di Firenze, I-50019 Sesto Fiorentino, Italy
| | - E Imbergamo
- Dipartimento di Fisica e Geologia dell'Università e INFN, Sezione di Perugia, I-06100 Perugia, Italy
| | - B Jenninger
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - J Jerhot
- Charles University, 116 36 Prague 1, Czech Republic
| | - R W L Jones
- University of Lancaster, Lancaster LA1 4YW, United Kingdom
| | - K Kampf
- Charles University, 116 36 Prague 1, Czech Republic
| | - V Kekelidze
- Joint Institute for Nuclear Research, 141980 Dubna (MO), Russia
| | - S Kholodenko
- Institute for High Energy Physics-State Research Center of Russian Federation, 142281 Protvino (MO), Russia
| | - G Khoriauli
- Institut für Physik and PRISMA Cluster of Excellence, Universität Mainz, D-55099 Mainz, Germany
| | - A Khotyantsev
- Institute for Nuclear Research of the Russian Academy of Sciences, 117312 Moscow, Russia
| | - A Kleimenova
- Université Catholique de Louvain, B-1348 Louvain-La-Neuve, Belgium
| | - A Korotkova
- Joint Institute for Nuclear Research, 141980 Dubna (MO), Russia
| | - M Koval
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - V Kozhuharov
- Laboratori Nazionali di Frascati, I-00044 Frascati, Italy
| | - Z Kucerova
- Faculty of Mathematics, Physics and Informatics, Comenius University, 842 48 Bratislava, Slovakia
| | - Y Kudenko
- Institute for Nuclear Research of the Russian Academy of Sciences, 117312 Moscow, Russia
| | - J Kunze
- Institut für Physik and PRISMA Cluster of Excellence, Universität Mainz, D-55099 Mainz, Germany
| | - V Kurochka
- Institute for Nuclear Research of the Russian Academy of Sciences, 117312 Moscow, Russia
| | - V Kurshetsov
- Institute for High Energy Physics-State Research Center of Russian Federation, 142281 Protvino (MO), Russia
| | - G Lamanna
- Dipartimento di Fisica dell'Università e INFN, Sezione di Pisa, I-56100 Pisa, Italy
| | - G Lanfranchi
- Laboratori Nazionali di Frascati, I-00044 Frascati, Italy
| | - E Lari
- Dipartimento di Fisica dell'Università e INFN, Sezione di Pisa, I-56100 Pisa, Italy
| | - G Latino
- Dipartimento di Fisica e Astronomia dell'Università e INFN, Sezione di Firenze, I-50019 Sesto Fiorentino, Italy
| | - P Laycock
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - C Lazzeroni
- University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - G Lehmann Miotto
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - M Lenti
- Dipartimento di Fisica e Astronomia dell'Università e INFN, Sezione di Firenze, I-50019 Sesto Fiorentino, Italy
| | - E Leonardi
- INFN, Sezione di Roma I, I-00185 Roma, Italy
| | - P Lichard
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - L Litov
- Joint Institute for Nuclear Research, 141980 Dubna (MO), Russia
| | - R Lollini
- Dipartimento di Fisica e Geologia dell'Università e INFN, Sezione di Perugia, I-06100 Perugia, Italy
| | - D Lomidze
- Institut für Physik and PRISMA Cluster of Excellence, Universität Mainz, D-55099 Mainz, Germany
| | - A Lonardo
- INFN, Sezione di Roma I, I-00185 Roma, Italy
| | - P Lubrano
- INFN, Sezione di Perugia, I-06100 Perugia, Italy
| | - M Lupi
- INFN, Sezione di Perugia, I-06100 Perugia, Italy
| | - N Lurkin
- University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - D Madigozhin
- Joint Institute for Nuclear Research, 141980 Dubna (MO), Russia
| | - I Mannelli
- Scuola Normale Superiore e INFN, Sezione di Pisa, I-56100 Pisa, Italy
| | - A Mapelli
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - F Marchetto
- INFN, Sezione di Torino, I-10125 Torino, Italy
| | - R Marchevski
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - S Martellotti
- Laboratori Nazionali di Frascati, I-00044 Frascati, Italy
| | - P Massarotti
- Dipartimento di Fisica "Ettore Pancini" e INFN, Sezione di Napoli, I-80126 Napoli, Italy
| | - K Massri
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - E Maurice
- University of Liverpool, Liverpool L69 7ZE, United Kingdom
| | - M Medvedeva
- Institute for Nuclear Research of the Russian Academy of Sciences, 117312 Moscow, Russia
| | - A Mefodev
- Institute for Nuclear Research of the Russian Academy of Sciences, 117312 Moscow, Russia
| | - E Menichetti
- Dipartimento di Fisica dell'Università e INFN, Sezione di Torino, I-10125 Torino, Italy
| | - E Migliore
- Dipartimento di Fisica dell'Università e INFN, Sezione di Torino, I-10125 Torino, Italy
| | - E Minucci
- Université Catholique de Louvain, B-1348 Louvain-La-Neuve, Belgium
| | - M Mirra
- Dipartimento di Fisica "Ettore Pancini" e INFN, Sezione di Napoli, I-80126 Napoli, Italy
| | - M Misheva
- Joint Institute for Nuclear Research, 141980 Dubna (MO), Russia
| | - N Molokanova
- Joint Institute for Nuclear Research, 141980 Dubna (MO), Russia
| | - M Moulson
- Laboratori Nazionali di Frascati, I-00044 Frascati, Italy
| | - S Movchan
- Joint Institute for Nuclear Research, 141980 Dubna (MO), Russia
| | - M Napolitano
- Dipartimento di Fisica "Ettore Pancini" e INFN, Sezione di Napoli, I-80126 Napoli, Italy
| | - I Neri
- Dipartimento di Fisica e Scienze della Terra dell'Università e INFN, Sezione di Ferrara, I-44122 Ferrara, Italy
| | - F Newson
- University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - A Norton
- Dipartimento di Fisica e Scienze della Terra dell'Università e INFN, Sezione di Ferrara, I-44122 Ferrara, Italy
| | - M Noy
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - T Numao
- TRIUMF, Vancouver, British Columbia V6T 2A3, Canada
| | - V Obraztsov
- Institute for High Energy Physics-State Research Center of Russian Federation, 142281 Protvino (MO), Russia
| | - A Ostankov
- Institute for High Energy Physics-State Research Center of Russian Federation, 142281 Protvino (MO), Russia
| | - S Padolski
- Université Catholique de Louvain, B-1348 Louvain-La-Neuve, Belgium
| | - R Page
- University of Bristol, Bristol BS8 1TH, United Kingdom
| | - V Palladino
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - A Parenti
- Dipartimento di Fisica e Astronomia dell'Università e INFN, Sezione di Firenze, I-50019 Sesto Fiorentino, Italy
| | - C Parkinson
- University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - E Pedreschi
- Dipartimento di Fisica dell'Università e INFN, Sezione di Pisa, I-56100 Pisa, Italy
| | - M Pepe
- INFN, Sezione di Perugia, I-06100 Perugia, Italy
| | - M Perrin-Terrin
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - L Peruzzo
- Institut für Physik and PRISMA Cluster of Excellence, Universität Mainz, D-55099 Mainz, Germany
| | - P Petrov
- Université Catholique de Louvain, B-1348 Louvain-La-Neuve, Belgium
| | - Y Petrov
- TRIUMF, Vancouver, British Columbia V6T 2A3, Canada
| | - F Petrucci
- Dipartimento di Fisica e Scienze della Terra dell'Università e INFN, Sezione di Ferrara, I-44122 Ferrara, Italy
| | - R Piandani
- Dipartimento di Fisica e Geologia dell'Università e INFN, Sezione di Perugia, I-06100 Perugia, Italy
| | - M Piccini
- INFN, Sezione di Perugia, I-06100 Perugia, Italy
| | - J Pinzino
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - I Polenkevich
- Joint Institute for Nuclear Research, 141980 Dubna (MO), Russia
| | - L Pontisso
- INFN, Sezione di Pisa, I-56100 Pisa, Italy
| | - Yu Potrebenikov
- Joint Institute for Nuclear Research, 141980 Dubna (MO), Russia
| | | | - M Raggi
- Dipartimento di Fisica, Sapienza Università di Roma e INFN, Sezione di Roma I, I-00185 Roma, Italy
| | - A Romano
- University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - P Rubin
- George Mason University, Fairfax, Virginia 22030, USA
| | - G Ruggiero
- University of Lancaster, Lancaster LA1 4YW, United Kingdom
| | - V Ryjov
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - A Salamon
- INFN, Sezione di Roma Tor Vergata, I-00133 Roma, Italy
| | - C Santoni
- Dipartimento di Fisica e Geologia dell'Università e INFN, Sezione di Perugia, I-06100 Perugia, Italy
| | - G Saracino
- Dipartimento di Fisica "Ettore Pancini" e INFN, Sezione di Napoli, I-80126 Napoli, Italy
| | - F Sargeni
- INFN, Sezione di Roma Tor Vergata, I-00133 Roma, Italy
| | - S Schuchmann
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - V Semenov
- Institute for High Energy Physics-State Research Center of Russian Federation, 142281 Protvino (MO), Russia
| | - A Sergi
- University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - A Shaikhiev
- Université Catholique de Louvain, B-1348 Louvain-La-Neuve, Belgium
| | - S Shkarovskiy
- Joint Institute for Nuclear Research, 141980 Dubna (MO), Russia
| | - D Soldi
- Dipartimento di Fisica dell'Università e INFN, Sezione di Torino, I-10125 Torino, Italy
| | - M Sozzi
- Dipartimento di Fisica dell'Università e INFN, Sezione di Pisa, I-56100 Pisa, Italy
| | - T Spadaro
- Laboratori Nazionali di Frascati, I-00044 Frascati, Italy
| | - F Spinella
- INFN, Sezione di Pisa, I-56100 Pisa, Italy
| | - A Sturgess
- University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - V Sugonyaev
- Institute for High Energy Physics-State Research Center of Russian Federation, 142281 Protvino (MO), Russia
| | - J Swallow
- University of Birmingham, Edgbaston, Birmingham B15 2TT, United Kingdom
| | - S Trilov
- University of Bristol, Bristol BS8 1TH, United Kingdom
| | - P Valente
- INFN, Sezione di Roma I, I-00185 Roma, Italy
| | - B Velghe
- TRIUMF, Vancouver, British Columbia V6T 2A3, Canada
| | - S Venditti
- CERN, European Organization for Nuclear Research, CH-1211 Geneva 23, Switzerland
| | - P Vicini
- INFN, Sezione di Roma I, I-00185 Roma, Italy
| | - R Volpe
- Université Catholique de Louvain, B-1348 Louvain-La-Neuve, Belgium
| | - M Vormstein
- Institut für Physik and PRISMA Cluster of Excellence, Universität Mainz, D-55099 Mainz, Germany
| | - H Wahl
- Dipartimento di Fisica e Scienze della Terra dell'Università e INFN, Sezione di Ferrara, I-44122 Ferrara, Italy
| | - R Wanke
- Institut für Physik and PRISMA Cluster of Excellence, Universität Mainz, D-55099 Mainz, Germany
| | - B Wrona
- University of Liverpool, Liverpool L69 7ZE, United Kingdom
| | - O Yushchenko
- Institute for High Energy Physics-State Research Center of Russian Federation, 142281 Protvino (MO), Russia
| | - M Zamkovsky
- Charles University, 116 36 Prague 1, Czech Republic
| | - A Zinchenko
- Joint Institute for Nuclear Research, 141980 Dubna (MO), Russia
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Aguilar-Arevalo A, Aoki M, Blecher M, Britton D, vom Bruch D, Bryman D, Chen S, Comfort J, Cuen-Rochin S, Doria L, Gumplinger P, Hussein A, Igarashi Y, Ito S, Kettell S, Kurchaninov L, Littenberg L, Malbrunot C, Mischke R, Numao T, Protopopescu D, Sher A, Sullivan T, Vavilov D. Search for three body pion decays
π+→l+νX. Int J Clin Exp Med 2021. [DOI: 10.1103/physrevd.103.052006] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Aguilar-Arevalo A, Aoki M, Blecher M, Britton D, vom Bruch D, Bryman D, Chen S, Comfort J, Cuen-Rochin S, Doria L, Gumplinger P, Hussein A, Igarashi Y, Ito S, Kettell S, Kurchaninov L, Littenberg L, Malbrunot C, Mischke R, Numao T, Protopopescu D, Sher A, Sullivan T, Vavilov D. Improved search for heavy neutrinos in the decay
π→eν. Int J Clin Exp Med 2018. [DOI: 10.1103/physrevd.97.072012] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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4
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Lamanna G, Aliberti R, Ambrosino F, Ammendola R, Angelucci B, Antonelli A, Anzivino G, Arcidiacono R, Barbanera M, Biagioni A, Bician L, Biino C, Bizzeti A, Blazek T, Bloch-Devaux B, Bonaiuto V, Boretto M, Bragadireanu M, Britton D, Brizioli F, Brunetti M, Bryman D, Bucci F, Capussela T, Ceccucci A, Cenci P, Cerny V, Cerri C, Checcucci B, Conovaloff A, Cooper P, Cortina Gil E, Corvino M, Costantini F, Cotta Ramusino A, Coward D, D’Agostini G, Dainton J, Dalpiaz P, Danielsson H, De Simone N, Di Filippo D, Di Lella L, Doble N, Dobrich B, Duval F, Duk V, Engelfried J, Enik T, Estrada-Tristan N, Falaleev V, Fantechi R, Fascianelli V, Federici L, Fedotov S, Filippi A, Fiorini M, Fry J, Fu J, Fucci A, Fulton L, Gamberini E, Gatignon L, Georgiev G, Ghinescu S, Gianoli A, Giorgi M, Giudici S, Gonnella F, Goudzovski E, Graham C, Guida R, Gushchin E, Hahn F, Heath H, Husek T, Hutanu O, Hutchcroft D, Iacobuzio L, Iacopini E, Imbergamo E, Jenninger B, Kampf K, Kekelidze V, Kholodenko S, Khoriauli G, Khotyantsev A, Kleimenova A, Korotkova A, Koval M, Kozhuharov V, Kucerova Z, Kudenko Y, Kunze J, Kurochka V, Kurshetsov V, Lanfranchi G, Lamanna G, Latino G, Laycock P, Lazzeroni C, Lenti M, Lehmann Miotto G, Leonardi E, Lichard P, Litov L, Lollini R, Lomidze D, Lonardo A, Lubrano P, Lupi M, Lurkin N, Madigozhin D, Mannelli I, Mannocchi G, Mapelli A, Marchetto F, Marchevski R, Martellotti S, Massarotti P, Massri K, Maurice E, Medvedeva M, Mefodev A, Menichetti E, Migliore E, Minucci E, Mirra M, Misheva M, Molokanova N, Moulson M, Movchan S, Napolitano M, Neri I, Newson F, Norton A, Noy M, Numao T, Obraztsov V, Ostankov A, Padolski S, Page R, Palladino V, Parkinson C, Pedreschi E, Pepe M, Perrin-Terrin M, Peruzzo L, Petrov P, Petrucci F, Piandani R, Piccini M, Pinzino J, Polenkevich I, Pontisso L, Potrebenikov Y, Protopopescu D, Raggi M, Romano A, Rubin P, Ruggiero G, Ryjov V, Salamon A, Santoni C, Saracino G, Sargeni F, Semenov V, Sergi A, Shaikhiev A, Shkarovskiy S, Soldi D, Sougonyaev V, Sozzi M, Spadaro T, Spinella F, Sturgess A, Swallow J, Trilov S, Valente P, Velghe B, Venditti S, Vicini P, Volpe R, Vormstein M, Wahl H, Wanke R, Wrona B, Yushchenko O, Zamkovsky M, Zinchenko A. NA62 and NA48/2 results on search for Heavy Neutral Leptons. EPJ Web Conf 2018. [DOI: 10.1051/epjconf/201817901009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
In this paper we present new results on upper limits for the search of Heavy Neutral Leptons (HNL) with data collected by NA48/2 (2003-2004), NA62-RK (2007) and NA62 (2015) CERN experiments. The data collected with different trigger configuration allow to search for both long and short living heavy neutrinos in the mass range below the kaon mass. In addition the status of the search for K+ → π+vv with the NA62 detector will be briefly presented.
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5
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Aguilar-Arevalo A, Aoki M, Blecher M, Britton DI, Bryman DA, Vom Bruch D, Chen S, Comfort J, Ding M, Doria L, Cuen-Rochin S, Gumplinger P, Hussein A, Igarashi Y, Ito S, Kettell SH, Kurchaninov L, Littenberg LS, Malbrunot C, Mischke RE, Numao T, Protopopescu D, Sher A, Sullivan T, Vavilov D, Yamada K. Improved Measurement of the π→eν Branching Ratio. Phys Rev Lett 2015; 115:071801. [PMID: 26317713 DOI: 10.1103/physrevlett.115.071801] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Indexed: 06/04/2023]
Abstract
A new measurement of the branching ratio R_{e/μ}=Γ(π^{+}→e^{+}ν+π^{+}→e^{+}νγ)/Γ(π^{+}→μ^{+}ν+π^{+}→μ^{+}νγ) resulted in R_{e/μ}^{exp}=[1.2344±0.0023(stat)±0.0019(syst)]×10^{-4}. This is in agreement with the standard model prediction and improves the test of electron-muon universality to the level of 0.1%.
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Affiliation(s)
- A Aguilar-Arevalo
- Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de Mexico, Distrito Federal 04510 México
| | - M Aoki
- Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - M Blecher
- Physics Department, Virginia Tech, Blacksburg, Virginia 24061, USA
| | - D I Britton
- Physics Department, University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - D A Bryman
- Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - D Vom Bruch
- Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - S Chen
- Department of Engineering Physics, Tsinghua University, Beijing 100084, People's Republic of China
| | - J Comfort
- Physics Department, Arizona State University, Tempe, Arizona 85287, USA
| | - M Ding
- Department of Engineering Physics, Tsinghua University, Beijing 100084, People's Republic of China
| | - L Doria
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - S Cuen-Rochin
- Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - P Gumplinger
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - A Hussein
- University of Northern British Columbia, Prince George, British Columbia V2N 4Z9, Canada
| | - Y Igarashi
- KEK, 1-1 Oho, Tsukuba-shi, Ibaraki 305-0801, Japan
| | - S Ito
- Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
| | - S H Kettell
- Brookhaven National Laboratory, Upton, New York 11973-5000, USA
| | - L Kurchaninov
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - L S Littenberg
- Brookhaven National Laboratory, Upton, New York 11973-5000, USA
| | - C Malbrunot
- Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - R E Mischke
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - T Numao
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - D Protopopescu
- Physics Department, University of Glasgow, Glasgow G12 8QQ, United Kingdom
| | - A Sher
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - T Sullivan
- Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - D Vavilov
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - K Yamada
- Graduate School of Science, Osaka University, Toyonaka, Osaka 560-0043, Japan
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6
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Artamonov A, Bassalleck B, Bhuyan B, Blackmore E, Bryman D, Chen S, Chiang IH, Christidi IA, Cooper P, Diwan M, Frank J, Fujiwara T, Hu J, Ives J, Izmaylov A, Jaffe D, Kabe S, Kettell S, Khabibullin M, Khotjantsev A, Kitching P, Kobayashi M, Komatsubara T, Konaka A, Kudenko Y, Landsberg L, Lewis B, Li K, Littenberg L, Macdonald J, Mildenberger J, Mineev O, Miyajima M, Mizouchi K, Muramatsu N, Nakano T, Nomachi M, Nomura T, Numao T, Obraztsov V, Omata K, Patalakha D, Poutissou R, Redlinger G, Sato T, Sekiguchi T, Shaikhiev A, Shinkawa T, Strand R, Sugimoto S, Tamagawa Y, Tschirhart R, Tsunemi T, Vavilov D, Viren B, Wang Z, Wei H, Yershov N, Yoshimura Y, Yoshioka T. Search for heavy neutrinos in K+→μ+νHdecays. Int J Clin Exp Med 2015. [DOI: 10.1103/physrevd.91.052001 10.1103/physrevd.91.059903] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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7
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Adler S, Bazarko AO, Bergbusch PC, Blackmore EW, Bryman DA, Chen S, Chiang IH, Diwan MV, Frank JS, Fujiwara T, Haggerty JS, Hu J, Inagaki T, Ito MM, Jaffe DE, Jain V, Kabe S, Kettell SH, Kitching P, Kobayashi M, Komatsubara TK, Konaka A, Kuno Y, Kuriki M, Li KK, Littenberg LS, Macdonald JA, Meyers PD, Mildenberger J, Miyajima M, Muramatsu N, Nakano T, Ng C, Ng S, Nomura T, Numao T, Poutissou JM, Poutissou R, Redlinger G, Sato T, Shimada K, Shimoyama T, Shinkawa T, Shoemaker FC, Stone JR, Strand RC, Sugimoto S, Tamagawa Y, Tsunemi T, Witzig C, Yoshimura Y. Measurement of theK+→π0μ+νμγbranching ratio. Int J Clin Exp Med 2010. [DOI: 10.1103/physrevd.81.092001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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8
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Artamonov AV, Bassalleck B, Bhuyan B, Blackmore EW, Bryman DA, Chen S, Chiang IH, Christidi IA, Cooper PS, Diwan MV, Frank JS, Fujiwara T, Hu J, Ives J, Jaffe DE, Kabe S, Kettell SH, Khabibullin MM, Khotjantsev AN, Kitching P, Kobayashi M, Komatsubara TK, Konaka A, Kozhevnikov AP, Kudenko YG, Kushnirenko A, Landsberg LG, Lewis B, Li KK, Littenberg LS, Macdonald JA, Mildenberger J, Mineev OV, Miyajima M, Mizouchi K, Mukhin VA, Muramatsu N, Nakano T, Nomachi M, Nomura T, Numao T, Obraztsov VF, Omata K, Patalakha DI, Petrenko SV, Poutissou R, Ramberg EJ, Redlinger G, Sato T, Sekiguchi T, Shinkawa T, Strand RC, Sugimoto S, Tamagawa Y, Tschirhart R, Tsunemi T, Vavilov DV, Viren B, Wang Z, Yershov NV, Yoshimura Y, Yoshioka T. New measurement of the K+-->pi+ nunu branching ratio. Phys Rev Lett 2008; 101:191802. [PMID: 19113260 DOI: 10.1103/physrevlett.101.191802] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/18/2008] [Indexed: 05/27/2023]
Abstract
Three events for the decay K+-->pi+ nunu have been observed in the pion momentum region below the K+-->pi+pi0 peak, 140 < Ppi < 199 MeV/c, with an estimated background of 0.93+/-0.17(stat.) -0.24+0.32(syst.) events. Combining this observation with previously reported results yields a branching ratio of B(K+-->pi+ nunu) = (1.73(-1.05)+1.15) x 10(-10) consistent with the standard model prediction.
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Affiliation(s)
- A V Artamonov
- Institute for High Energy Physics, Protvino, Moscow Region, 142 280, Russia
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9
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Numao T, Davydov YI, Poutissou JM, Awes TC, Cianciolo V, Berridge S, Bugg W, Efremenko Y, Gearhart R, Ovchinnikov S. Search for free decay of negative pions in water and light materials. Int J Clin Exp Med 2006. [DOI: 10.1103/physrevd.73.092004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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10
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Anisimovsky VV, Artamonov AV, Bassalleck B, Bhuyan B, Blackmore EW, Bryman DA, Chen S, Chiang IH, Christidi IA, Cooper PS, Diwan MV, Frank JS, Fujiwara T, Hu J, Ivashkin AP, Jaffe DE, Kabe S, Kettell SH, Khabibullin MM, Khotjantsev AN, Kitching P, Kobayashi M, Komatsubara TK, Konaka A, Kozhevnikov AP, Kudenko YG, Kushnirenko A, Landsberg LG, Lewis B, Li KK, Littenberg LS, Macdonald JA, Mildenberger J, Mineev OV, Miyajima M, Mizouchi K, Mukhin VA, Muramatsu N, Nakano T, Nomachi M, Nomura T, Numao T, Obraztsov VF, Omata K, Patalakha DI, Petrenko SV, Poutissou R, Ramberg EJ, Redlinger G, Sato T, Sekiguchi T, Shinkawa T, Strand RC, Sugimoto S, Tamagawa Y, Tschirhart R, Tsunemi T, Vavilov DV, Viren B, Yershov NV, Yoshimura Y, Yoshioka T. Improved measurement of the K+-->pi+nunu; branching ratio. Phys Rev Lett 2004; 93:031801. [PMID: 15323812 DOI: 10.1103/physrevlett.93.031801] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2004] [Indexed: 05/24/2023]
Abstract
An additional event near the upper kinematic limit for K+-->pi(+)nunu; has been observed by experiment E949 at Brookhaven National Laboratory. Combining previously reported and new data, the branching ratio is B(K+-->pi(+)nunu;)=(1.47(+1.30)(-0.89))x10(-10) based on three events observed in the pion momentum region 211<P<229 MeV/c. At the measured central value of the branching ratio, the additional event had a signal-to-background ratio of 0.9.
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Affiliation(s)
- V V Anisimovsky
- Institute for Nuclear Research RAS, 60 October Revolution Prospect 7a, 117312 Moscow, Russia
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11
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Adler S, Aoki M, Ardebili M, Atiya MS, Bazarko AO, Bergbusch PC, Blackmore EW, Bryman DA, Chiang IH, Convery MR, Diwan MV, Frank JS, Haggerty JS, Inagaki T, Ito MM, Jain V, Kabe S, Kazumori M, Kettell SH, Kitching P, Kobayashi M, Komatsubara TK, Konaka A, Kuno Y, Kuriki M, Kycia TF, Li KK, Littenberg LS, Macdonald JA, McPherson RA, Meyers PD, Mildenberger J, Miyajima M, Muramatsu N, Nakano T, Ng C, Nishide J, Numao T, Otomo A, Poutissou JM, Poutissou R, Redlinger G, Sasaki T, Sato T, Shinkawa T, Shoemaker FC, Soluk R, Stone JR, Strand RC, Sugimoto S, Tamagawa Y, Witzig C, Yoshimura Y. Search for the rare decayK+→π+γ. Int J Clin Exp Med 2002. [DOI: 10.1103/physrevd.65.052009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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12
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Adler S, Bazarko AO, Bergbusch PC, Blackmore EW, Bryman DA, Chen S, Chiang IH, Diwan MV, Frank JS, Haggerty JS, Hu J, Inagaki T, Ito M, Jain V, Kabe S, Kettell SH, Kitching P, Kobayashi M, Komatsubara TK, Konaka A, Kuno Y, Kuriki M, Li KK, Littenberg LS, Macdonald JA, Meyers PD, Mildenberger J, Miyajima M, Muramatsu N, Nakano T, Ng C, Ng S, Numao T, Poutissou JM, Poutissou R, Redlinger G, Sato T, Shimada K, Shimoyama T, Shinkawa T, Shoemaker FC, Stone JR, Strand RC, Sugimoto S, Tamagawa Y, Witzig C, Yoshimura Y. Further evidence for the decay K+ -->pi+nu(nu). Phys Rev Lett 2002; 88:041803. [PMID: 11801107 DOI: 10.1103/physrevlett.88.041803] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/02/2001] [Indexed: 05/23/2023]
Abstract
Additional evidence for the rare kaon decay K+-->pi+nu(nu) has been found in a new data set with comparable sensitivity to the previously reported result. One new event was observed in the pion momentum region examined, 211<P<229 MeV/c, bringing the total for the combined data set to two. Including all data taken, the backgrounds were estimated to contribute 0.15+/-0.05 events. The branching ratio is B(K+-->pi+nu(nu)) = 1.57(+1.75)(-0.82)x10(-10).
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Affiliation(s)
- S Adler
- Brookhaven National Laboratory, Upton, New York 11973
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13
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Numao T, Fukuda T. [Japanese guideline for the diagnosis and management of bronchial asthma (1998)--its results and reversion]. Nihon Rinsho 2001; 59:1871-7. [PMID: 11676124] [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] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
Japanese guideline for the diagnosis and management of bronchial asthma was initially reported in 1998 and revised in 2000. This guideline was based on two former guidelines which were made by Japanese Allergology Society in 1993 and NIH.NHLBI in 1995 (GINA). New version of this guideline in 2000 pointed that the efficacy and adverse reaction of leukotriene receptor antagonists, the effectiveness of new inhaled corticosteroid (fluticasone propionate), and transdermal administration of beta-2 stimulant (tulobuterol hydrochloride). The precise evaluation of this guideline in terms of propriety, reliability, applicability and so on was not performed.
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Affiliation(s)
- T Numao
- Department of Pulmonary Medicine and Clinical Immunology, Dokkyo University School of Medicine
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14
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Cheng G, Ueda T, Numao T, Kuroki Y, Nakajima H, Fukushima Y, Motojima S, Fukuda T. Increased levels of surfactant protein A and D in bronchoalveolar lavage fluids in patients with bronchial asthma. Eur Respir J 2000; 16:831-5. [PMID: 11153579 DOI: 10.1183/09031936.00.16583100] [Citation(s) in RCA: 85] [Impact Index Per Article: 3.5] [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: 11/05/2022]
Abstract
Surfactant proteins (SP)-A and SP-D are collagen-like glycoproteins belonging to the "collectin" class of C-type lectins, which are primarily synthesized in type II cells. Recent studies reported the possibility of local production of SP-A and SP-D in the airways, but the amounts of surfactant proteins in patients with bronchial asthma have not been studied. The composition of surfactant proteins in mild, stable asthmatics in the first lavage as bronchial lavage (BL) and the second and third lavages consecutively as alveolar lavages (AL) were therefore, analysed separately. The co-relationships in the BL between the amounts of surfactant proteins and those of fucose, which is one of the markers of submucosal secretion were also analysed. Increased amounts of SP-A in BL and AL of in asthmatics were found as compared with those in controls. A high concentration of SP-D in the AL asthma patients was also found. The levels of SP-A correlated with those of fucose in patients with bronchial asthma (r=0.849, p<0.01). The observations in the present study suggested that surfactant protein A may be secreted from the airways with allergic inflammation in a different manner from the alveoli. The increased levels of surfactant proteins A and D may play a protective role in an allergic inflammation in the pathogenesis of bronchial asthma.
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Affiliation(s)
- G Cheng
- Dept of Internal Medicine and Clinical Immunology, Dokkyo University School of Medicine, Tochigi, Japan
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15
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Stafforini DM, Numao T, Tsodikov A, Vaitkus D, Fukuda T, Watanabe N, Fueki N, McIntyre TM, Zimmerman GA, Makino S, Prescott SM. Deficiency of platelet-activating factor acetylhydrolase is a severity factor for asthma. J Clin Invest 1999; 103:989-97. [PMID: 10194471 PMCID: PMC408260 DOI: 10.1172/jci5574] [Citation(s) in RCA: 103] [Impact Index Per Article: 4.1] [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: 10/21/1998] [Accepted: 02/17/1999] [Indexed: 01/07/2023] Open
Abstract
Asthma, a family of airway disorders characterized by airway inflammation, has an increasing incidence worldwide. Platelet-activating factor (PAF) may play a role in the pathophysiology of asthma. Its proinflammatory actions are antagonized by PAF acetylhydrolase. A missense mutation (V279F) in the PAF acetylhydrolase gene results in the complete loss of activity, which occurs in 4% of the Japanese population. We asked if PAF acetylhydrolase deficiency correlates with the incidence and severity of asthma in Japan. We found that the prevalence of PAF acetylhydrolase deficiency is higher in Japanese asthmatics than healthy subjects and that the severity of this syndrome is highest in homozygous-deficient subjects. We conclude that the PAF acetylhydrolase gene is a modulating locus for the severity of asthma.
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Affiliation(s)
- D M Stafforini
- Huntsman Cancer Institute, Program in Human Molecular Biology and Genetics, Eccles Institute of Human Genetics, University of Utah, Salt Lake City, Utah 84112-5332, USA.
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16
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Numao T, Ogawa K, Fujinuma H, Furuya N. [Pulsatile diameter change of coronary artery lumen estimated by intravascular ultrasound]. J Cardiol 1997; 30:1-8. [PMID: 9253689] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
To analyze the pulsatile movement of coronary arterial walls, intravascular ultrasound was used to measure the diameter changes in the arterial lumen of 32 patients with coronary artery disease (CAD group) and five patients with chest pain but no CAD (control group). Measurements were performed on segments of the proximal left anterior descending coronary artery that were angiographically nonstenotic. Following identification of the peak systolic and end-diastolic phases using intra-coronary pressure tracings, the luminal diameters were measured around the center at 4 degrees intervals using a computer-assisted image analyzer. The pulsatile diameter change (dD) and end-diastolic diameter (DD) at each interval were analyzed and compared between the CAD and control groups. Mean DD did not differ significantly between the CAD group (4.53 +/- 0.69 mm) and the control group (4.52 +/- 0.51 mm). In contrast, the mean dD in the CAD group (0.05 +/- 0.18 mm) was significantly lower than that of the control group (0.13 +/- 0.12 mm). The mean maximum and minimum standardized percentage pulsatile diameter changes were -10.6 +/- 6.2% and 16.2 +/- 5.9%, respectively, in the CAD group, and -2.7 +/- 4.6% and 11.7 +/- 1.3%, respectively, in the control group. The mean standard deviation of dD was significantly greater in the CAD group (0.182 +/- 0.05 mm) than in the control group (0.116 +/- 0.04 mm), which indicated dD in CAD patients varied to a greater degree than in control patients. The ratio dD/dP (dP : pulse pressure) was used as an index of vascular compliance at the site of measurement. The mean dD/dP was significantly smaller in the CAD group (1.1 +/- 2.5 x 10(-3) mm/mmHg) than in the control group (4.0 +/- 3.3 x 10(-3) mm/mmHg). Aniso-diametric wall movement in the coronary artery (as indicated by a negative dD during systolic expansion) was enhanced in the CAD group compared to the control group. This was probably caused by the early stages of the arterial sclerotic process as it progressed heterogeneously along the vessel wall. Thus, aniso-diametric movement, which is a functional abnormality of the coronary arterial wall, appears to antedate detectable morphological changes.
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Affiliation(s)
- T Numao
- First Department of Internal Medicine, Dokkyo University School of Medicine, Tochigi
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17
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Sugiyama K, Numao T, Motojima S, Mori K, Ohsako K, Ohshima F, Saotome K, Fukuda T. [A case with systemic lupus erythematosus complicated with tuberculosis sacroiliac arthritis]. Ryumachi 1997; 37:36-41. [PMID: 9128422] [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] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
A 26-year-old woman was admitted to our hospital because of fever of unknown origin. She had been treated with prednisolone, elcatonin and alfacalcidol under the diagnosis of systemic lupus erythematosus (SLE) and aseptic necrosis of femoral bone head. Six months ago she began to have a fever and subsequently left low back pain, for which extensive examinations were performed in other hospital but their causes remained unclear. She was referred to our hospital for further evaluation and therapy in October 1995. Bacteriological, immunological or serological examinations did not reveal the origin of fever. CT and ultrasonic examination did not show any abnormality. However, MRI, which was taken for the evaluation of aseptic necrosis of femoral bone head, showed the abscess shadow in sacroiliac joint. Open biopsy was performed and Mycobacterium tuberculosis bacilli were detected from the abscess. To our best knowledge, this is the first report of SEE with tuberculosis sacroiliac arthritis.
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Affiliation(s)
- K Sugiyama
- Department of Medicine and Clinical Immunology, Dokkyo University School of Medicine, Tochigi
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18
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Ogawa K, Numao T, Iizuka M, Yanagisawa A, Yoshino H, Ishikawa K, Miyake F, Matsumoto N, Murayama M, Hasegawa N, Kobayashi A, Kikawada R, Kinoshita S, Muramatsu T, Matsuo H, Isshiki T, Ochiai M, Miyashita H. Angiographic and coronary risk factor analyses of Japanese patients with ischemic heart disease before age 40--a multicenter cooperative study. Jpn Circ J 1996; 60:822-30. [PMID: 8958190 DOI: 10.1253/jcj.60.822] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
Coronary angiographic and risk factor (RF) characteristics were analyzed in 133 Japanese patients with ischemic heart disease (IHD) who were less than 40 years old and who had undergone coronary angiography (CAG) during the past 10 years at six university hospitals in the Tokyo area. We compared the coronary angiographic characteristics of the subject group with those of 216 controls with coronary sclerosis detected by CAG who were more than 40 years old (older control group) and the RF characteristics with those of 133 sex- and age-matched volunteers (younger control group). Sixty seven percent of the subjects (89 cases) were diagnosed as having myocardial infarction (MI) and 33% (44 cases) had angina pectoris (AP). Coronary artery disorders in this group consisted of 103 (77%) cases of coronary sclerosis, 20 (15%) cases of coronary spasm and 10 (8%) cases of miscellaneous diseases, eg, possible vasculitis with connective tissue disease, congenital anomalies, etc. The incidences of significant (> or = 75%) sclerotic narrowing in 0 vessels (31%) and 1 vessel (49%) in the subject group were significantly (p < 0.01) higher than those in the older control group, while the incidence of multivessel disease was significantly (p < 0.05) less in the subject group than in the older control group. The incidences of the following coronary risk factors were significantly (p < 0.05) higher in the subjects than in the younger controls: smoking (83% vs 35%), hypercholesteremia (44% vs 10%), obesity (31% vs 9%), hypertension (29% vs 3%), familial IHD (28% vs 7%) and diabetes mellitus (19% vs 2%). Thus, zero- or single-vessel disease predominated in the younger subject group and the prevalence of coronary risk factors was significantly higher in the subject.
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Affiliation(s)
- K Ogawa
- 1st Department of Medicine, Dokkyo University School of Medicine, Tochigi, Japan
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19
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Adler S, Atiya MS, Chiang IH, Frank JS, Haggerty JS, Kycia TF, Li KK, Littenberg LS, Sambamurti A, Stevens A, Strand RC, Witzig C, Louis WC, Akerib DS, Ardebili M, Convery MR, Ito MM, Marlow DR, McPherson RA, Meyers PD, Selen MA, Shoemaker FC, Smith AJ, Blackmore EW, Bryman DA, Felawka L, Kitching P, Konaka A, Kujala VA, Kuno Y, Macdonald JA, Nakano T, Numao T, Padley P, Poutissou JM, Poutissou R, Roy J, Soluk R, Turcot AS. Search for the decay K+--> pi + nu nu -bar. Phys Rev Lett 1996; 76:1421-1424. [PMID: 10061719 DOI: 10.1103/physrevlett.76.1421] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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20
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Bryman DA, Numao T. Search for massive neutrinos in pi +--> micro+ nu decay. Phys Rev D Part Fields 1996; 53:558-559. [PMID: 10019815 DOI: 10.1103/physrevd.53.558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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21
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Fukuda T, Fukushima Y, Numao T, Ando N, Arima M, Nakajima H, Sagara H, Adachi T, Motojima S, Makino S. Role of interleukin-4 and vascular cell adhesion molecule-1 in selective eosinophil migration into the airways in allergic asthma. Am J Respir Cell Mol Biol 1996; 14:84-94. [PMID: 8534490 DOI: 10.1165/ajrcmb.14.1.8534490] [Citation(s) in RCA: 92] [Impact Index Per Article: 3.3] [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: 01/31/2023] Open
Abstract
Recent in vitro studies have suggested that interleukin-4 (IL-4) may be involved in the preferential migration of eosinophils into the airways in allergic asthma through its capacity to selectively increase vascular cell adhesion molecule-1 (VCAM-1) expression on vessels. To test this hypothesis, we studied the expression of VCAM-1, E-selectin, and intercellular adhesion molecule-1 (ICAM-1) on vascular endothelium in bronchial mucosal biopsies from 20 allergic asthmatics using an immunohistochemistry technique and related the observations to IL-4 levels in bronchoalveolar lavage (BAL) fluid simultaneously obtained and to eosinophil infiltration in the bronchial mucosa. IL-4 was detectable in BAL fluid from nine subjects (range, 15.1 to 110 pg/ml in 20-fold concentrated BAL fluid) (IL-4-positive asthmatics) but unmeasurable in the remaining 11 subjects (IL-4-negative asthmatics). The IL-4-positive asthmatics showed a significantly increased expression of VCAM-1 but not E-selectin and ICAM-1 on vessels as compared with both IL-4-negative asthmatics (P < 0.001) and diseased control subjects (P < 0.001). In asthmatics, VCAM-1 expression was positively correlated with BAL IL-4 levels (rs = 0.89; P < 0.0001). Moreover, there was a significant correlation between the endothelial expression of VCAM-1 and the number of eosinophils, but not neutrophils, in the bronchial submucosa (r2 = 0.76; P < 0.001). A significant correlation was also found between BAL IL-4 levels and the number of eosinophils. These results suggest that IL-4 is a VCAM-1-selective activator also in human airways and the VCAM-1-dependent pathways play a role in selective migration of eosinophils into the airways in allergic asthma, and support the hypothesis described above.
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Affiliation(s)
- T Fukuda
- Department of Internal Medicine and Clinical Immunology, Dokkyo University School of Medicine, Tochigi, Japan
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22
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Fukuda T, Numao T, Akutsu I, Toda M, Motojima S, Makino S. Inhibition of leukotriene C4 and B4 release by human eosinophils with the new 5-lipoxygenase inhibitor 6-hydroxy-2(4-sulfamoylbenzylamino)-4,5,7-trimethylbenzothiazo le hydrochloride. Arzneimittelforschung 1995; 45:1002-4. [PMID: 7488299] [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] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Eosinophils generate and release leukotrienes C4 and B4 (LTC4, LTB4) and platelet activating factor (PAF), all of which have the capacity to cause inflammation and tissue injury in the airways. This study has examined the effects of a new 5-lipoxygenase inhibitor, 6-hydroxy-2-(4-sulfamoylbenzylamino)-4,5,7-trimethylbenzothiazo le hydrochloride (CAS 120164-49-0, E6080) on the release of LTC4, LTB4 and PAF by human eosinophils, Eosinophils stimulated by 1 mumol/l calcium ionophore A23187 for 15 min released 37.5 +/- 2.2 ng, 2.3 +/- 0.3 ng and 4.0 +/- 0.3 pmol per 10(6) cells of immunoreactive LTC4, LTB4 and PAF, respectively (mean +/- SEM, n = 4). LTC4 and LTB4 releases were inhibited dose-dependently by the addition of E6080 to the cell suspension. The IC50 values were 0.26 mumol/l for LTC4 and 0.23 mumol/l for LTB4. PAF release was not inhibited. These results suggest that E6080 is a potent inhibitor of LTC4 and LTB4 release from eosinophils and may provide a protective effect against bronchoconstriction during late-phase asthmatic responses.
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Affiliation(s)
- T Fukuda
- Department of Internal Medicine and Clinical Immunology, Dokkyo University School of Medicine, Tochigi, Japan
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24
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Abstract
We measured the serum concentration of soluble interleukin-2 receptor (sIL-2R) in asthma patients and healthy controls to evaluate T-lymphocyte activation in this disease. The SIL-2R concentrations in patients with asthma irrespective of presence of acute attacks were significantly higher than those of the controls (p < 0.001). Although the sIL-2R concentrations were similar in the patients with acute asthma and those in remission, levels in patients with moderate and severe asthma attacks were significantly higher than levels for patients in remission (p < 0.001). These results suggest that T-lymphocyte activation occurs in asthma patients and becomes more prominent during moderate and severe acute attacks.
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Affiliation(s)
- S Motojima
- Department of Medicine and Clinical Immunology, Dokkyo University School of Medicine, Tochigi, Japan
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Numao T, Fukuda T, Fukushima Y, Makino S. The role of cytokines for recruitment of eosinophils in bronchial asthma. Pathophysiology 1994. [DOI: 10.1016/0928-4680(94)90517-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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26
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Fukuda T, Nakajima H, Fukushima Y, Akutsu I, Numao T, Majima K, Motojima S, Sato Y, Takatsu K, Makino S. Detection of interleukin-5 messenger RNA and interleukin-5 protein in bronchial biopsies from asthma by nonradioactive in situ hybridization and immunohistochemistry. J Allergy Clin Immunol 1994; 94:584-93. [PMID: 8083466 DOI: 10.1016/0091-6749(94)90134-1] [Citation(s) in RCA: 12] [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: 01/28/2023]
Abstract
Recently direct evidence for the role of interleukin-5 (IL-5) in eosinophilic inflammation in the airways of persons with asthma has been provided by an in situ hybridization study that used radioisotope-labeled IL-5 complementary RNA probes. Radioisotope-labeled probes, although sensitive, require autoradiographic detection, which is time-consuming. In the most recent study we attempted to detect IL-5 messenger RNA in the bronchial biopsy specimens from patients with asthma using nonradioactive in situ hybridization, which gives rapid results. Bronchial biopsy specimens were obtained from eight patients with asthma and seven diseased control subjects. IL-5 complementary DNA probes were labeled with digoxigenin-deoxyuridine triphosphate and hybridized to permeabilized sections. Hybridization signals were visualized by an immunohistochemistry technique. Positive hybridization signals were observed in six of the eight biopsy specimens from patients with asthma. Pretreatment with ribonuclease or hybridization with an unrelated probe produced negative results. Immunohistochemical staining of serial sections with a monoclonal antibody to IL-5 revealed that a few cells within the mucosa positively stained, suggesting active synthesis of IL-5. Biopsy results from the seven diseased control subjects did not show any hybridization signal. These results confirm and extend previous observations of IL-5 messenger RNA expression in the airways of patients with asthma, and suggest that digoxigenin-labeled IL-5 complementary DNA probes would be a powerful research tool.
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Affiliation(s)
- T Fukuda
- Department of Internal Medicine and Clinical Immunology, Dokkyo University School of Medicine, Tochigi-ken, Japan
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Britton DI, Ahmad S, Bryman DA, Burnham RA, Clifford ET, Kitching P, Kuno Y, Macdonald JA, Numao T, Olin A, Poutissou JM, Dixit MS. Measurement of the pi +-->e+ nu branching ratio. Phys Rev D Part Fields 1994; 49:28-39. [PMID: 10016742 DOI: 10.1103/physrevd.49.28] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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28
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Numao T, Fukuda T, Akutsu I, Nakajima H, Makino S, Sato Y. [Detection of IL-5 mRNA in bronchial biopsies from asthmatics by non-radioactive in situ hybridization]. Nihon Kyobu Shikkan Gakkai Zasshi 1993; 31 Suppl:132-8. [PMID: 8007456] [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] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
To determine whether IL-5 is locally produced in the bronchial mucosa of asthmatics, and to ascertain the precise cell type producing this cytokine, we examined bronchial biopsies by non-radioactive in situ hybridization and immunohistochemistry. IL-5 cDNA probes were labeled with digoxigenin-dUTP and hybridized to frozen or paraffin tissue sections. Hybridization signals were visualized by an immunohistochemistry technique. An IL-5-producing T cell clone derived from a patient with adult T cell leukemia was used as a positive control. Specific hybridization signals for IL-5 mRNA were observed in the bronchial mucosa of symptomatic asthmatics. No hybridization signal was detected in the control subject in whom no underlying disease was found. Immunohistochemical staining of serial sections using a panel of monoclonal antibodies directed against lymphocyte subsets strongly suggested that cells expressing mRAN for IL-5 were T cells. These results suggest that a cell-cell interaction between T cells and eosinophils through IL-5 may play an important role in the airway inflammation in asthma.
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Affiliation(s)
- T Numao
- Department of Internal Medicine and Clinical Immunology, Dokkyo University School of Medicine
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29
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Suzuki Y, Kasai K, Takekoshi K, Oka M, Banba N, Numao T, Sugimura H, Iizuka M, Shimoda S. Effects of pituitary adenylate cyclase activating polypeptide (PACAP) on the cardiovascular system. Regul Pept 1993; 47:213-20. [PMID: 7901874 DOI: 10.1016/0167-0115(93)90426-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The effects of pituitary adenylate cyclase activating polypeptide (PACAP) on the cardiovascular system were examined. When PACAP-38 (270 or 420 pmol/kg body weight) was administered intravenously to the anesthetized dogs, both mean arterial pressure and left ventricular systolic pressure increased within 2 min after a temporal depression. Pulmonary arterial systolic pressure increased promptly. These hemodynamic values and heart rates (HR) 5 min after injection were significantly higher than the corresponding values in physiological saline injected dogs, and some effects were still sustained over 15 min. Cardiac output and stroke volume also increased and the values at 5 min were significantly higher than those in controls. The high dose of PACAP-38 (420 pmol/kg) evoked greater responses than those induced by the low dose (270 pmol/kg). Plasma adrenaline, but neither noradrenaline nor dopamine concentration significantly increased 15 min after injection of 420 pmol/kg PACAP-38. Moreover, PACAP-38 clearly stimulated cyclic AMP production in rat cardiac myocytes with EC50 of 1.5 x 10(-9) M and plasma cAMP levels significantly and dose-dependently increased in dogs 5 min after administration. These results first demonstrated that PACAP has inotropic and chronotropic actions on the heart possibly by a direct stimulation of adenylate cyclase in cardiac myocytes and also that the cardiovascular functions may be possibly modified by an evoked adrenaline secretion in vivo.
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Affiliation(s)
- Y Suzuki
- Department of Endocrinology, Internal Medicine, Dokkyo University School of Medicine, Tochigi, Japan
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30
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Atiya MS, Chiang IH, Frank JS, Haggerty JS, Ito MM, Kycia TF, Li KK, Littenberg LS, Sambamurti A, Stevens A, Strand RC, Louis WC, Akerib DS, Marlow DR, Meyers PD, Selen MA, Shoemaker FC, Smith AJ, Blackmore EW, Bryman DA, Felawka L, Kitching P, Konaka A, Kuno Y, Macdonald JA, Numao T, Padley P, Poutissou J, Poutissou R, Roy J, Soluk R, Turcot AS. Search for the decays K+--> pi + nu nu -bar and K+--> pi +X0 for 150<MX0<250 MeV/c2. Phys Rev D Part Fields 1993; 48:R1-R4. [PMID: 10016100 DOI: 10.1103/physrevd.48.r1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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31
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Atiya MS, Chiang IH, Frank JS, Haggerty JS, Ito MM, Kycia TF, Li KK, Littenberg LS, Sambamurti A, Stevens A, Strand RC, Louis WC, Akerib DS, Marlow DR, Meyers PD, Selen MA, Shoemaker FC, Smith AJ, Blackmore EW, Bryman DA, Felawka L, Kitching P, Konaka A, Kuno Y, Macdonald JA, Numao T, Padley P, Poutissou JM, Poutissou R, Roy J, Soluk R, Turcot AS. Search for the decay K+--> pi + nu nu -bar. Phys Rev Lett 1993; 70:2521-2524. [PMID: 10053584 DOI: 10.1103/physrevlett.70.2521] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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32
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Nagata M, Fukuda T, Numao T, Makino S, Dohi Y. Tumor necrosis factor alpha induces migration of human eosinophils. Arerugi 1993; 42:549-55. [PMID: 8323453] [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] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
In order to evaluate the role of tumor necrosis factor alpha (TNF alpha) in the recruitment of eosinophils and neutrophils into the tissues, we studied the effect of TNF alpha on the migration of those cells in vitro, employing a modified Boyden's chamber technique. TNF alpha induced a significant migration of human eosinophils in a dose-dependent manner, and the preincubation of eosinophils with TNF alpha enhanced platelet activating factor (PAF)-induced eosinophil migration. Checkerboard analysis revealed that the eosinophil migration induced by TNF alpha was mainly due to chemokinesis. On the other hand, TNF alpha induced neither neutrophil migration nor enhancement of PAF-induced neutrophil migration. These results indicate that TNF alpha possesses a chemokinetic effect on human eosinophils and that TNF alpha augments the migration of eosinophils by PAF.
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Affiliation(s)
- M Nagata
- Department of Medicine and Clinical Immunology, Dokkyo University School of Medicine
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33
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Iwahisa Y, Fukuda T, Numao T, Terasawa M, Makino S. [Advance in eosinophil chemotaxis assay method--automatic count of migrated cells by the image analyzing system in the Boyden method]. Nihon Rinsho 1993; 51:718-23. [PMID: 8492448] [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] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Eosinophils, which are prominent inflammatory cells in the asthmatic airway, are attracted to the airway by several chemoattractants. At present, eosinophil chemotaxis is studied employing the Boyden Millipore chamber system in vitro. In the Boyden method, the number of migrated cells are evaluated by direct microscopic observation of individual cells. This microscopic procedure usually requires much time and it is difficult to obtain objective results. Therefore, we have developed a new fractional measurement technique, using the image analyzing system connected with a color video camera and a computer for counting the eosinophils which have migrated into a filter. Using this system with the Boyden method, migrated cells were observed more objectively and quickly. Therefore, this image analyzing system with the Boyden method, may be a useful technique for the fractional measurement of migrated eosinophils in a sample mixture of eosinophils and neutrophils.
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Affiliation(s)
- Y Iwahisa
- Research Laboratories, Yoshitomi Pharmaceutical Industries, Ltd
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34
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Numao T, Agrawal DK. Neuropeptides modulate human eosinophil chemotaxis. J Immunol 1992; 149:3309-15. [PMID: 1385521] [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] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
To investigate the role of neuropeptides in allergic inflammation, we examined the effect of peptides on eosinophil chemotaxis. Eosinophils were purified from the blood of allergic and normal subjects using a discontinuous Percoll density gradients. Chemotaxis was induced by platelet-activating factor (PAF) and leukotriene B4, and was assayed by a modified Boyden's chamber technique. Four neuropeptides were examined in this study: substance P (SP), neurokinin A, calcitonin gene-related peptide (CGRP), and cholecystokinin octapeptide. Peptides alone (10 nM to 10 microM) were not chemotactic for eosinophils. However, when eosinophils were pre-treated with peptides (100 nM) at 37 degrees C for 30 min, chemotactic response to PAF (10 nM) was significantly enhanced (p < 0.01) in allergic subjects; % control by SP, neurokinin A, CGRP and cholecystokinin octapeptide was 269 +/- 42, 243 +/- 32, 227 +/- 21, and 251 +/- 42, respectively (n = 8). Similar results were obtained in leukotriene B4-induced eosinophil chemotaxis. In contrast, no enhancement was observed in normal subjects. Potentiating effect of SP and CGRP on PAF-induced eosinophil chemotaxis in allergic subjects was significantly attenuated by SP antagonist [D-Pro2,D-Trp7,9]-SP and human CGRP (8-37) receptor antagonist, respectively. Neutral endopeptidase inhibitors (phosphoramidon, leupeptin, and bestatin) failed to significantly augment the PAF-induced eosinophil chemotaxis when the cells were pretreated with various peptides and neutral endopeptidase inhibitors. The C-terminal fragment of SP (SP6-11) had an effect similar to that of the intact SP molecule, whereas no potentiating effect by the N-terminal of SP (SP1-9) was observed. These results suggest that neuropeptides may play a significant role in eosinophil infiltration by priming cells in allergic inflammation.
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Affiliation(s)
- T Numao
- Allergic Disease Center, Creighton University School of Medicine, Omaha, NE 68178
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35
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Numao T, Agrawal DK. Neuropeptides modulate human eosinophil chemotaxis. The Journal of Immunology 1992. [DOI: 10.4049/jimmunol.149.10.3309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Abstract
To investigate the role of neuropeptides in allergic inflammation, we examined the effect of peptides on eosinophil chemotaxis. Eosinophils were purified from the blood of allergic and normal subjects using a discontinuous Percoll density gradients. Chemotaxis was induced by platelet-activating factor (PAF) and leukotriene B4, and was assayed by a modified Boyden's chamber technique. Four neuropeptides were examined in this study: substance P (SP), neurokinin A, calcitonin gene-related peptide (CGRP), and cholecystokinin octapeptide. Peptides alone (10 nM to 10 microM) were not chemotactic for eosinophils. However, when eosinophils were pre-treated with peptides (100 nM) at 37 degrees C for 30 min, chemotactic response to PAF (10 nM) was significantly enhanced (p < 0.01) in allergic subjects; % control by SP, neurokinin A, CGRP and cholecystokinin octapeptide was 269 +/- 42, 243 +/- 32, 227 +/- 21, and 251 +/- 42, respectively (n = 8). Similar results were obtained in leukotriene B4-induced eosinophil chemotaxis. In contrast, no enhancement was observed in normal subjects. Potentiating effect of SP and CGRP on PAF-induced eosinophil chemotaxis in allergic subjects was significantly attenuated by SP antagonist [D-Pro2,D-Trp7,9]-SP and human CGRP (8-37) receptor antagonist, respectively. Neutral endopeptidase inhibitors (phosphoramidon, leupeptin, and bestatin) failed to significantly augment the PAF-induced eosinophil chemotaxis when the cells were pretreated with various peptides and neutral endopeptidase inhibitors. The C-terminal fragment of SP (SP6-11) had an effect similar to that of the intact SP molecule, whereas no potentiating effect by the N-terminal of SP (SP1-9) was observed. These results suggest that neuropeptides may play a significant role in eosinophil infiltration by priming cells in allergic inflammation.
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Affiliation(s)
- T Numao
- Allergic Disease Center, Creighton University School of Medicine, Omaha, NE 68178
| | - D K Agrawal
- Allergic Disease Center, Creighton University School of Medicine, Omaha, NE 68178
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36
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Atiya MS, Chiang IH, Frank JS, Haggerty JS, Ito MM, Kycia TF, Li KK, Littenberg LS, Stevens AJ, Sambamurti A, Strand RC, Louis WC, Akerib DS, Marlow DR, Meyers PD, Selen MA, Shoemaker FC, Smith AJ, Blackmore EW, Bryman DA, Felawka L, Kitching P, Konaka A, Kuno Y, Macdonald JA, Numao T, Padley P, Poutissou JM, Poutissou R, Roy J, Turcot AS. Search for the decay pi 0--> gamma +X. Phys Rev Lett 1992; 69:733-736. [PMID: 10047019 DOI: 10.1103/physrevlett.69.733] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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37
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Britton DI, Ahmad S, Bryman DA, Burnham RA, Clifford ET, Kitching P, Kuno Y, Macdonald JA, Numao T, Olin A, Poutissou JM, Dixit MS. Improved search for massive neutrinos in pi +-->e+ nu decay. Phys Rev D Part Fields 1992; 46:R885-R887. [PMID: 10015041 DOI: 10.1103/physrevd.46.r885] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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38
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Fukuda T, Numao T, Akutsu I, Makino S. Platelet-activating factor (PAF)-induced chemotaxis and PAF binding to human eosinophils. J Lipid Mediat 1992; 5:145-9. [PMID: 1525356] [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] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Compared to PAF-induced platelet aggregation, the chemotactic response to PAF of human eosinophils requires higher PAF concentrations, suggesting a lower binding affinity of PAF for the eosinophil. To test this possibility, we examined the binding of PAF by human eosinophils. The dose range of unlabeled PAF required to produce inhibition of [3H]PAF binding was roughly the same as that for induction of chemotaxis, and was much higher than that in platelets as reported in the literature. These results indicate that the affinity of PAF for the eosinophil is considerably less than that for the platelet, and may explain the higher EC50 for eosinophil chemotaxis.
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Affiliation(s)
- T Fukuda
- Department of Medicine and Clinical Immunology, Dokkyo University School of Medicine, Tochigi, Japan
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39
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Agrawal DK, Ali N, Numao T. PAF receptors and G-proteins in human blood eosinophils and neutrophils. J Lipid Mediat 1992; 5:101-4. [PMID: 1326343] [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] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Identification of G-proteins and coupling of PAF receptors to G-proteins have been examined in the membranes of human blood eosinophils and neutrophils. Heterotrimeric G-proteins, Gi and GS, were present in both cell types, as demonstrated by immunoblotting and ADP-ribosylation with pertussis toxin. In addition, a group of low molecular mass (18-28 kDa) monomeric G-proteins was also identified. Pertussis toxin and GTP gamma S attenuated the specific binding of [3H]PAF, suggesting the occurrence of coupling between pertussis toxin-sensitive Gi protein and PAF receptors in eosinophils and neutrophils.
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Affiliation(s)
- D K Agrawal
- Allergic Disease Center, Creighton University School of Medicine, Omaha, NE 68178
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40
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Britton DI, Ahmad S, Bryman DA, Burnham RA, Clifford ET, Kitching P, Kuno Y, Macdonald JA, Numao T, Olin A, Poutissou JM, Dixit MS. Measurement of the pi +-->e+ nu branching ratio. Phys Rev Lett 1992; 68:3000-3003. [PMID: 10045582 DOI: 10.1103/physrevlett.68.3000] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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41
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Nakamura SN, Iwasaki M, Outa H, Hayano RS, Watanabe Y, Nagae T, Yamazaki T, Tada H, Numao T, Kuno Y, Kadono R. Negative-pion trapping by a metastable state in liquid helium. Phys Rev A 1992; 45:6202-6208. [PMID: 9907739 DOI: 10.1103/physreva.45.6202] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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42
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Atiya MS, Chiang IH, Frank JS, Haggerty JS, Ito MM, Kycia TF, Li KK, Littenberg LS, Stevens A, Strand RC, Louis WC, Akerib DS, Marlow DR, Meyers PD, Selen MA, Shoemaker FC, Smith AJ, Azuelos G, Blackmore EW, Bryman DA, Felawka L, Kitching P, Kuno Y, Macdonald JA, Numao T, Padley P, Poutissou JM, Poutissou R, Roy J. Upper limit on the branching ratio for the decay pi 0--> nu nu -bar. Phys Rev Lett 1991; 66:2189-2192. [PMID: 10043419 DOI: 10.1103/physrevlett.66.2189] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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43
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Armstrong DS, Ahmad S, Burnham RA, Gorringe TP, Hasinoff MD, Larabee AJ, Waltham CE, Azuelos G, Macdonald JA, Numao T, Poutissou JM, Blecher M, Wright DH, Clifford ET, Summhammer J, Depommier P, Poutissou R, Mes H, Robertson BC. Radiative muon capture on carbon, oxygen, and calcium. Phys Rev C Nucl Phys 1991; 43:1425-1447. [PMID: 9967183 DOI: 10.1103/physrevc.43.1425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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44
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Numao T, Fukuda T, Hirata A, Sagara H, Majima K, Nakajima H, Akutsu I, Ando N, Makino S. [Eosinophil cationic protein in patients with bronchial asthma]. Arerugi 1991; 40:93-9. [PMID: 1712583] [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] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
To evaluate the role of eosinophils in the pathogenesis of bronchial asthma, we measured eosinophil cationic protein (ECP), one of the eosinophil granule proteins. Serum ECP levels were measured by radioimmunoassay in asthmatic (n = 59) and non-asthmatic (n = 47) patients. Preliminary study showed that ECP levels were time-dependently increased in the blood samples until 3 hr. Based on the findings, we determined to measure serum ECP levels at 30 min after blood sampling. Serum ECP levels and blood eosinophil counts in asthmatic patients were significantly higher than those in non-asthmatic patients (p less than 0.01). There was also a positive correlation between serum ECP levels and blood eosinophil counts in patients with asthma (r = 0.46, p less than 0.001). No significant difference was observed in either serum ECP levels or blood eosinophil counts in asthmatic patients classified by clinical type and severity. Blood eosinophil counts in patients with asthma attacks were significantly greater than in those in remission (p less than 0.05), but no significant difference was observed in serum ECP levels between these groups, suggesting an enhanced elimination of ECP during attack. Serum alpha-2 macroglobulins, which bind to ECP and may function as scavengers for ECP, were not significantly different in these group. These results suggest that serum ECP levels may not be a direct indicator of eosinophil activation or degranulation in the pathogenesis of asthma.
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Affiliation(s)
- T Numao
- Department of Medicine and Clinical Immunology, Dokkyo University School of Medicine
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45
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Numao T, Fukuda T, Akutsu I, Makino S. [Effects of anti-asthmatic drugs on human eosinophil chemotaxis]. Nihon Kyobu Shikkan Gakkai Zasshi 1991; 29:65-71. [PMID: 1645817] [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] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
To evaluate the acute effects of anti-asthmatic drugs in vitro, we examined the modulation of various anti-asthmatic drugs in therapeutic concentrations on PAF-induced human eosinophil chemotaxis. Aminophylline (20 micrograms/ml) and Isoproterenol (10 nM) inhibited PAF (3 X 10(-8) M)-induced eosinophil chemotaxis nearly 30%, whereas no inhibitory effects were observed by Dexamethasone (0.1 microM), Tranilast, Ketotifen or Azelastine. Aminophylline (20 micrograms/ml) also inhibited LTB4 (3 X 10(-8) M)-induced eosinophil chemotaxis nearly 30%, whereas it did not inhibit chemotaxis induced by zymosan (5 mg/ml)-activated serum. These results indicate that anti-asthmatic drugs except for aminophylline and isoproterenol, when used acutely in therapeutic concentrations, have no striking inhibitory effects on PAF-induced eosinophil chemotaxis. These results further suggest the possibility that there are different mechanisms in eosinophil chemotaxis induced by PAF, LTB4 or by C5a.
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Affiliation(s)
- T Numao
- Department of Medicine and Clinical Immunology, Dokkyo University School of Medicine, Tochigi, Japan
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46
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Fukuda T, Akutsu I, Nakajima K, Fukushima Y, Numao T, Ando N, Motojima S, Makino S. [The role of eosinophils, neutrophils and lymphocytes for the development of bronchial hyperresponsiveness in a guinea pig model of asthma]. Nihon Kyobu Shikkan Gakkai Zasshi 1990; 28:1288-93. [PMID: 2273656] [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] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
To elucidate the role of eosinophils, neutrophils and lymphocytes for the development of bronchial hyperresponsiveness (BHR) following antigen exposure, we have developed a guinea pig model of BHR. Guinea pigs immunized by repeated exposure to aerosolized ovalbumin (OA) were intravenously given metopirone, a cortisol synthesis inhibitor, 24 hrs before and 30 min before antigen challenge, and to prevent death from immediate severe bronchoconstriction, chlorpheniramine maleate was also injected. After antigen challenge with high dose of OA, LAR occurred in twelve of fifteen animals (80%) and the bronchial responsiveness to acetylcholine (Ach) was significantly increased. Histologic examination at 72 h showed a significant increase in the number of eosinophils but not neutrophils within the tracheal walls. However, there was no significant correlation between the change in bronchial responsiveness to Ach at 24 h and the number of eosinophil in the tracheal wall at 72 h. When guinea pigs were treated with Cyclosporin A or FK506, T-lymphocyte selective immunosuppressive agents, from the beginning of immunization period, both eosinophil infiltration and an increase in bronchial responsiveness were inhibited. These results suggest that eosinophils and T-lymphocytes may play an important role in the development of bronchial hyperresponsiveness.
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Affiliation(s)
- T Fukuda
- Department of Medicine and Clinical Immunology, Dokkyo University School of Medicine, Tochigi, Japan
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47
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Atiya MS, Chiang IH, Frank JS, Haggerty JS, Ito MM, Kycia TF, Li KK, Littenberg LS, Stevens AJ, Strand RC, Louis WC, Akerib DS, Marlow DR, Meyers PD, Selen MA, Shoemaker FC, Smith AJ, Azuelos G, Blackmore EW, Bryman DA, Felawka L, Kitching P, Kuno Y, Macdonald JA, Numao T, Padley P, Poutissou JM, Poutissou R, Roy J. Search for the decay K+--> pi + gamma gamma. Phys Rev Lett 1990; 65:1188-1191. [PMID: 10042197 DOI: 10.1103/physrevlett.65.1188] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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48
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Akutsu I, Fukuda T, Numao T, Makino S. [Inhibitory effect of FK-506 on the development of late asthmatic response and on the increased bronchial responsiveness]. Arerugi 1990; 39:605-9. [PMID: 1705791] [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] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
We examined the effects of FK-506, a potent immunosuppressive agent, on the development of late asthmatic response (LAR) and on the increased bronchial responsiveness to acetylcholine following LAR in guinea pig model of asthma. Guinea pigs sensitized by repeated inhalation of ovalbumin (OA) were intravenously given metopiron 24 hours before and 30 minutes before antigen challenge and to prevent death from immediate severe bronchoconstriction, chlorpheniramine maleate was also injected. When we defined LAR as the responses with a two-fold increase in respiratory resistance during the late phase of antigen challenge, twelve out of fifteen control animals demonstrated apparent LAR. However, when guinea pigs were treated with FK-506 from the beginning of immunization period, the development of LAR was completely inhibited, although similar magnitude of immediate bronchoconstriction was observed, and a subsequent increase in bronchial responsiveness was significantly blocked. We also measured bronchial responsiveness to acetylcholine before, 24 and 72 hours after antigen challenge. FK-506-treated animals inhibited an increase in bronchial responsiveness to acetylcholine. These results suggest that the involvement of cell-mediated immunity may be important in the development of LAR and an increase in bronchial responsiveness.
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Affiliation(s)
- I Akutsu
- Department of Medicine and Clinical Immunology, Dokkyo University School of Medicine
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Fukuda T, Akutsu I, Amagai M, Numao T, Motojima S, Makino S. [Antigen-induced biphasic eosinophil infiltration in the airways of actively sensitized guinea pigs and its inhibition by PAF antagonist and cyclosporin A]. Arerugi 1990; 39:548-52. [PMID: 2222197] [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] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Bronchial eosinophilia is a characteristic of asthma. To elucidate the mechanisms of eosinophil accumulation in the airways, the time course of eosinophil infiltration in the airway mucosa after antigen inhalation was examined in actively sensitized and passively sensitized guinea pig models of asthma. The lungs and tracheae were removed at intervals after antigen challenge, fixed and stained. The eosinophil infiltration was quantitated in the tracheal walls by counting the number of cells per square millimeter. Guinea pigs sensitized by intraperitoneal injection of ovalbumin (OA) responded to a single exposure to aerosolized OA with biphasic infiltration of eosinophils in the tracheal walls; a striking early-phase which peaked at 6 hr and a delayed-phase which peaked at 24 hr and persisted for as long as 5 days. These kinetics were different from those observed with passively sensitized animals which showed only early-phase infiltration. Administration of CV-6209, a specific PAF antagonist, before and 12 hrs after antigen challenge significantly (p less than 0.01) inhibited the early-phase but not the delayed-phase eosinophil infiltration in actively sensitized animals. In contrast, when guinea pigs were treated with Cyclosporin A, a T lymphocyte-selective immunosuppressive agent, throughout the immunization period, the delayed-phase but not the early-phase infiltration was significantly (p less than 0.01) inhibited. These results suggest that PAF may contribute to early-phase and T cell factor(s) may contribute to delayed-phase eosinophil infiltration of the airways.
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Affiliation(s)
- T Fukuda
- Department of Medicine and Clinical Immunology, Dokkyo University School of Medicine
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50
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Fukuda T, Akutsu I, Numao T, Makino S. [Inhibition of antigen-induced late asthmatic response and bronchial hyperresponsiveness by cyclosporin A]. Arerugi 1990; 39:483-7. [PMID: 2393354] [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] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
We have previously demonstrated that Cyclosporin A (CyA), a T lymphocyte-selective immunosuppressive agent, reduced the delayed-phase bronchial eosinophil infiltration after antigen challenge in a guinea pig model of asthma. In the present study, we studied the effects of CyA on antigen-induced late asthmatic response (LAR) and bronchial hyperresponsiveness following LAR. Guinea pigs immunized by repeated exposure to aerosolized ovalbumin (OA) were intravenously given metopirone, a cortisol synthesis inhibitor, 24 hours before and 30 minutes before antigen challenge, and to prevent death from immediate severe bronchoconstriction, chlorpheniramine maleate was also injected. After antigen challenge with high dose of OA, LAR occurred in twelve of fifteen animals (80%) and the bronchial responsiveness to acetylcholine was significantly increased. However, when guinea pigs were treated with CyA from the beginning of immunization period, the development of LAR was completely inhibited, although similar magnitude of immediate bronchoconstriction was observed, and a subsequent increase in bronchial responsiveness was partially but significantly blocked. Since CyA has been shown to suppress activation of guinea pig T lymphocytes and their production of lymphokines, these results suggest that T cell factor(s) may be important for the elicitation of LAR and the antigen-induced bronchial hyperresponsiveness.
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Affiliation(s)
- T Fukuda
- Department of Medicine and Clinical Immunology, Dokkyo University School of Medicine
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