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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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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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Wagner K, Fittig E, Kunze J. Prävention von Anfang an: Praktische Umsetzung und Wirksamkeit der Mutter-Kind-Behandlung in der Celenus Klinik Carolabad. Geburtshilfe Frauenheilkd 2017. [DOI: 10.1055/s-0037-1598143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Affiliation(s)
- K Wagner
- Medizinisches Rehabilitationszentrum für Psychotherapie, Psychiatrie und Psychosomatik, Celenus Klinik Carolabad Chemnitz
| | - E Fittig
- Medizinisches Rehabilitationszentrum für Psychotherapie, Psychiatrie und Psychosomatik, Celenus Klinik Carolabad Chemnitz
| | - J Kunze
- Medizinisches Rehabilitationszentrum für Psychotherapie, Psychiatrie und Psychosomatik, Celenus Klinik Carolabad Chemnitz
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Galle M, Junge-Hoffmeister J, Kunze J, Croy I, Bittner A, Weidner K. Psychotherapeutische Versorgung von Frauen in Schwangerschaft und Postpartalzeit: Evaluation und Inanspruchnahme. Geburtshilfe Frauenheilkd 2017. [DOI: 10.1055/s-0037-1598142] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Affiliation(s)
- M Galle
- Klinik und Poliklinik für Psychotherapie und Psychosomatik, Medizinische Akademie Carl Gustav Carus, Dresden
| | - J Junge-Hoffmeister
- Klinik und Poliklinik für Psychotherapie und Psychosomatik, Medizinische Akademie Carl Gustav Carus, Dresden
| | - J Kunze
- Medizinisches Rehabilitationszentrum für Psychotherapie, Psychiatrie und Psychosomatik, Celenus Klinik Carolabad, Chemnitz
| | - I Croy
- Klinik und Poliklinik für Psychotherapie und Psychosomatik, Medizinische Akademie Carl Gustav Carus, Dresden
| | - A Bittner
- Klinik und Poliklinik für Psychotherapie und Psychosomatik, Medizinische Akademie Carl Gustav Carus, Dresden
| | - K Weidner
- Klinik und Poliklinik für Psychotherapie und Psychosomatik, Medizinische Akademie Carl Gustav Carus, Dresden
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Abstract
This article summarizes the specific treatment options in the combined mother-child treatment for women with postpartum psychiatric disorders. The incidence of postpartum mental illness is high, especially for postpartum depression that probably occurs in10-15 % of cases. Mental disorders not only have a negative impact on the mental health of the women affected, such as chronification and suicidal tendencies but can also adversely affect the mother-child relationship as well as the emotional and cognitive development of the child. For these reasons it is important, also under the aspects of a primary prevention with respect to the children of mentally ill mothers, to provide a needs-oriented, timely and disorder-specific interactional therapy, which also considers the long-term aspects of treatment. At the Celenus Klinik Carolabad in Chemnitz an integrated treatment model, the "Carola PLUS", could be established that caters for the particularly high demands of combined care and treatment for both mother and child.
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Affiliation(s)
- J Kunze
- Celenus Klinik Carolabad Chemnitz, Medizinisches Rehabilitationszentrum für Psychotherapie, Psychiatrie und Psychosomatik, Riedstraße 32, 09117, Chemnitz, Deutschland.
| | - K Wagner
- Celenus Klinik Carolabad Chemnitz, Medizinisches Rehabilitationszentrum für Psychotherapie, Psychiatrie und Psychosomatik, Riedstraße 32, 09117, Chemnitz, Deutschland
| | - E Fittig
- Celenus Klinik Carolabad Chemnitz, Medizinisches Rehabilitationszentrum für Psychotherapie, Psychiatrie und Psychosomatik, Riedstraße 32, 09117, Chemnitz, Deutschland
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Tripolitsioti D, Santhana Kumar K, Neve A, Pillong M, Kunze J, Schneider G, Shalaby T, Grotzer M, Baumgartner M. Restricting growth and spreading of paediatric medulloblastoma by blocking kinase signalling-dependent brain infiltration. Eur J Cancer 2016. [DOI: 10.1016/s0959-8049(16)61597-6] [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: 11/16/2022]
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Hannemann F, Hartmann A, Schmitt J, Lützner J, Seidler A, Campbell P, Delaunay CP, Drexler H, Ettema HB, García-Cimbrelo E, Huberti H, Knahr K, Kunze J, Langton DJ, Lauer W, Learmonth I, Lohmann CH, Morlock M, Wimmer MA, Zagra L, Günther KP. European multidisciplinary consensus statement on the use and monitoring of metal-on-metal bearings for total hip replacement and hip resurfacing. Orthop Traumatol Surg Res 2013; 99:263-71. [PMID: 23507457 DOI: 10.1016/j.otsr.2013.01.005] [Citation(s) in RCA: 99] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2012] [Revised: 01/21/2013] [Accepted: 01/25/2013] [Indexed: 02/02/2023]
Abstract
INTRODUCTION There is an ongoing debate about the optimal use of metal-on-metal (MoM) bearings in total hip replacement, since there are uncertainties about local and systemic adverse effects due to wear and corrosion of these bearings. Despite various national recommendations, efforts to achieve international harmonization of specific evidence-based recommendations for best practice are still lacking. HYPOTHESIS An international consensus study group should be able to develop recommendations on the use and monitoring of MoM bearings, preferably at the European level, through a multidisciplinary approach, by integrating the perspectives of various stakeholders. MATERIALS AND METHODS Twenty-one experts representing three stakeholder groups and eight countries participated in this European consensus study, which consisted of a consensus meeting, subsequent structured discussion, and consensus voting. RESULTS The current statement defines first of all benefits, local and systemic risks, as well as uncertain issues related to MoM bearings. Safety assessment after implantation of MoM comprises all patients. A closer follow-up is recommended for large head MoM (≥36mm) and resurfacing. In these implants basic follow-up should consist of x-rays and metal ion measurement of cobalt in whole blood, performed with GF-AAS or ICP-MS. Clinical and/or radiographic abnormality as well as elevated ion levels needs additional imaging (ultrasound, CT-scan and/or MARS-MRI). Cobalt values less than 2 μg/L are probably devoid of clinical concern, the threshold value for clinical concern is expected to be within the range of 2-7 μg/L. DISCUSSION This is the first multinational, interdisciplinary, and multiprofessional approach for developing a recommendation for the use and monitoring of MoM bearings in total hip replacement. The current recommendations are in partial agreement with previous statements regarding the extent of follow-up and imaging techniques. They however differ from previous communications regarding measurement of metal ions and especially the investigated medium, technique, and eventual threshold levels. LEVEL OF EVIDENCE Level V, expert opinion/agreement conference.
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Affiliation(s)
- F Hannemann
- University Hospital Carl Gustav Carus Dresden, Orthopaedics, Fetscherstr. 74, 01307 Dresden, Germany
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8
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Koch A, Buendgens L, Dückers H, Bruensing J, Matthes M, Kunze J, Herbers U, Lutz HH, Luedde T, Tischendorf JJW, Trautwein C, Tacke F. [Gastrointestinal bleeding in liver cirrhosis at the ICU]. Z Gastroenterol 2013; 51:19-25. [PMID: 23315647 DOI: 10.1055/s-0032-1330414] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Due to portal hypertension and bleeding disorders, patients with liver cirrhosis are at increased risk for severe gastrointestinal bleedings (GIB), commonly requiring therapy at the intensive care unit (ICU). In order to identify epidemiological and prognostic factors for GIB in cirrhotic patients, we retrospectively analysed patients from our medical ICU from 1999 to 2010. Among 7376 critically ill patients, 650 (8.8 %) were diagnosed with liver cirrhosis. Hepatic cirrhosis was frequently found in ICU patients admitted due to severe GIB (23.2 % of 711 patients had cirrhosis). Moreover, patients with cirrhosis were at increased risk to develop severe GIB during intensive care treatment (40.9 % of 44 patients with GIB during ICU stay had cirrhosis). Besides the high rate of variceal bleedings (64.4 %) in cirrhotic patients, non-variceal haemorrhages were also common (28.5 %). We identified the MELD score and necessity of mechanical ventilation as independent risk factors for mortality in cirrhotic patients with severe GIB. Patients with liver cirrhosis and severe GIB had significantly impaired prognosis (case-related fatality rate of 26.1 % with cirrhosis vs. 6.8 % without cirrhosis), especially in cases of newly developed GIB during ICU therapy. Advanced therapeutic approaches and novel strategies are warranted to improve the critical prognosis of these high-risk patients.
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Affiliation(s)
- A Koch
- Medizinische Klinik III, Universitätsklinikum Aachen
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Kunze J, Ngai V, Koelling S, Jacobs JJ, Wimmer MA. The Use of Europiumstearate to Trace Polyethylene Wear Debris in Joint Fluid after Prosthetic Joint Replacement - A Feasibility Study. Trends Appl Spectrosc 2013; 10:43-48. [PMID: 24920867 PMCID: PMC4049185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Ultra-high molecular weight polyethylene (UHMWPE) is the most common counterface material against metals or ceramics in artificial hip or knee joints. Wear and the resulting particulate debris, however, limit the life span of the implant. In this study, the general feasibility of using Europium (Eu) as tracer material to quantify UHMWPE wear in joint fluid is investigated. Using Inductively Coupled Mass Spectrometry (ICP-MS), recovery experiments of Eu in artificial joint fluid were performed. In order to dope polyethylene with 50 ppm Eu, nascent UHMWPE powder was mixed with a solution of Eu-stearate. The heterogeneity of the mixture was assessed by determining the coefficient of variation (CV) of the Eu content in various weighted samples. After molding of the UHMWPE powder mixture, cylindrical pins of 10 mm diameter were machined and worn against cobalt-chromium metal disks submersed in artificial joint fluid. The Eu-content of fluid samples taken at certain time intervals was measured and compared with UHMWPE weight loss of the pins. A satisfactory homogenization of Eu in the UHMWPE powder was achieved. Tracer-based and weight-loss determined wear rates were highly correlated (Pearson correlation coefficients > 0.991). Also the detection bias was within acceptable limits. Thus both methods demonstrated good agreement.
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Affiliation(s)
- J Kunze
- Department of Orthopedic Surgery, Rush University Medical Center, 1611 West Harrison Street, Chicago, IL 60612, USA ; Central Laboratory of Analytical Chemistry, Hamburg University of Technology, Eißendorfer Strasse 38, D-21073 Hamburg, Germany
| | - V Ngai
- Department of Orthopedic Surgery, Rush University Medical Center, 1611 West Harrison Street, Chicago, IL 60612, USA
| | - S Koelling
- Central Laboratory of Analytical Chemistry, Hamburg University of Technology, Eißendorfer Strasse 38, D-21073 Hamburg, Germany
| | - J J Jacobs
- Department of Orthopedic Surgery, Rush University Medical Center, 1611 West Harrison Street, Chicago, IL 60612, USA
| | - M A Wimmer
- Department of Orthopedic Surgery, Rush University Medical Center, 1611 West Harrison Street, Chicago, IL 60612, USA
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Kunze J, Stillhart A, Sobotta B, Reiber T, Nitschke I. Lehrinhalte in der prägradualen gerostomatologischen Ausbildung in Österreich, Deutschland und der Schweiz. Dtsch Med Wochenschr 2012. [DOI: 10.1055/s-0032-1323353] [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: 10/27/2022]
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Nitschke I, Stillhart A, Kunze J, Sobotta B, Reiber T. Zur mobilen zahnärztlichen Versorgung im Kanton Zürich – Ein Modell für das deutsche Gesundheitssystem? Dtsch Med Wochenschr 2012. [DOI: 10.1055/s-0032-1323401] [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: 10/27/2022]
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Stillhart A, Kunze J, Sobotta B, Reiber T, Nitschke I. Der Zahnarzt als Partner im Versorgungsnetzwerk dementer Senioren. Dtsch Med Wochenschr 2012. [DOI: 10.1055/s-0032-1323489] [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: 10/27/2022]
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Paschos O, Kunze J, Stimming U, Maglia F. A review on phosphate based, solid state, protonic conductors for intermediate temperature fuel cells. J Phys Condens Matter 2011; 23:234110. [PMID: 21613707 DOI: 10.1088/0953-8984/23/23/234110] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
The electrolytes currently used for proton exchange membrane fuel cells are mainly based on polymers such as Nafion which limits the operation regime of the cell to ∼80 °C. Solid oxide fuel cells operate at much elevated temperatures compared to proton exchange membrane fuel cells (∼1000 °C) and employ oxide electrolytes such as yttrium stabilized zirconia and gadolinium doped ceria. So far an intermediate temperature operation regime (300 °C) has not been widely explored which would open new pathways for novel fuel cell systems. In this review we summarize the potential use of phosphate compounds as electrolytes for intermediate temperature fuel cells. Various examples on ammonium polyphosphate, pyrophosphate, cesium phosphate and other phosphate based electrolytes are presented and their preparation methods, conduction mechanism and conductivity values are demonstrated.
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Affiliation(s)
- O Paschos
- Department of Physics E19, Technische Universität München, James-Franck-Strasse 1, D-85748, Garching, Germany.
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Valota A, LeClere D, Skeldon P, Curioni M, Hashimoto T, Berger S, Kunze J, Schmuki P, Thompson G. Influence of water content on nanotubular anodic titania formed in fluoride/glycerol electrolytes. Electrochim Acta 2009. [DOI: 10.1016/j.electacta.2009.02.098] [Citation(s) in RCA: 139] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Abstract
Patients with neurofibromatosis have an increased risk of developing malignant tumors in comparison to the general population. We describe a woman who developed a malignant peripheral nerve sheath tumor in a pre-existing neurofibroma.
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Affiliation(s)
- V Dietrich
- Klinik für Dermatologie, Allergologie und Umweltmedizin, St. Barbara-Hospital, Katholisches Klinikum Duisburg, Barbarastrasse 67, 47167 Duisburg.
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Kontos AG, Kontos AI, Tsoukleris DS, Likodimos V, Kunze J, Schmuki P, Falaras P. Photo-induced effects on self-organized TiO2 nanotube arrays: the influence of surface morphology. Nanotechnology 2009; 20:045603. [PMID: 19417323 DOI: 10.1088/0957-4484/20/4/045603] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Self-organized TiO(2) nanotubes with packed, vertically aligned morphology and different lateral characteristics were grown on Ti metal substrates by controlled electrochemical anodization in phosphate/HF and ethylene glycol/HF electrolytes. The wetting, photo-induced superhydrophilicity, and photocatalytic activity of the nanotubular materials were investigated under ultraviolet irradiation. The photoactivity of the TiO(2) nanotube arrays was analysed in terms of their morphological characteristics that were determined by means of scanning electron microscopy and atomic force microscopy in conjunction with geometrical modelling. The wetting and the UV-induced superhydrophilicity could be accordingly modelled by the Cassie-Baxter mode arising from the large scale roughness of the nanotubular arrays in combination with the Wenzel mode due to the small scale roughness induced by ridges at the outer tube surface. The photocatalytic activity of the TiO(2) nanotube arrays was further found to correlate quantitatively with the variation of the geometric roughness factor, verifying the strong impact of morphology on the photo-induced properties of the vertically oriented TiO(2) tubular architecture.
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Affiliation(s)
- A G Kontos
- Institute of Physical Chemistry, NCSR Demokritos, Athens, Greece.
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Valota A, Leclere DJ, Hashimoto T, Skeldon P, Thompson GE, Berger S, Kunze J, Schmuki P. The efficiency of nanotube formation on titanium anodized under voltage and current control in fluoride/glycerol electrolyte. Nanotechnology 2008; 19:355701. [PMID: 21828855 DOI: 10.1088/0957-4484/19/35/355701] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The formation of nanotubes on titanium is compared for anodizing under controlled voltage and controlled current in a fluoride/glycerol electrolyte. Rutherford backscattering spectroscopy and nuclear reaction analysis are employed to determine the film compositions. Film morphologies are examined by electron microscopy. The findings reveal films of approximate composition TiO(2).0.15TiF(4) that probably also contain derivatives of glycerol. Controlled voltage conditions resulted in more uniform final nanotube dimensions, for a particular charge density, and the highest efficiency of film growth, with the charge of the titanium in the film representing ∼48% of the charge passed during anodizing. Under current control, the efficiency decreased from ∼40% to ∼23% with increase of the current density from 0.1 to 0.5 mA cm(-2). Further, the thickness of the barrier layer was sometimes enhanced under current control, possibly due to a non-uniform current distribution and consequently elevated local temperature.
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Affiliation(s)
- A Valota
- Corrosion and Protection Centre, School of Materials, The University of Manchester, PO Box 88, Manchester M60 1QD, UK
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Stergiopoulos T, Ghicov A, Likodimos V, Tsoukleris DS, Kunze J, Schmuki P, Falaras P. Dye-sensitized solar cells based on thick highly ordered TiO(2) nanotubes produced by controlled anodic oxidation in non-aqueous electrolytic media. Nanotechnology 2008; 19:235602. [PMID: 21825797 DOI: 10.1088/0957-4484/19/23/235602] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Dye-sensitized solar cells (DSSCs) were prepared using TiO(2) nanotubes, grown by controlled Ti anodic oxidation in non-aqueous media. Smooth, vertically oriented TiO(2) nanotube arrays, presenting a high degree of self-organization and a length of 20 µm, have been grown using ethylene glycol electrolyte containing HF. As-grown nanotubes exhibit an amorphous structure, which transforms to the anatase TiO(2) crystalline phase upon post-annealing in air at 450 °C. Atomic force microscopy (AFM) revealed the porous morphology together with high roughness and fractality of the surface. The annealed tubes were sensitized by the standard N719 ruthenium dye and the adsorption was characterized using resonance micro-Raman spectroscopy and adsorption-desorption measurements. The sensitized tubes were further used as active photoelectrodes after incorporation in sandwich-type DSSCs using both liquid and solidified electrolytes. The efficiencies obtained under air mass (AM) 1.5 conditions, using a back-side illumination geometry, were very promising: 0.85% using a composite polymer redox electrolyte, while the efficiency was further increased up to 1.65% using a liquid electrolyte.
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Affiliation(s)
- T Stergiopoulos
- Institute of Physical Chemistry, NCSR 'Demokritos', 15310 Aghia Paraskevi Attikis, Athens, Greece
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Burian B, Wimmer MA, Kunze J, Sprecher CM, Pennekamp PH, von Engelhardt LV, Diedrich O, Kraft CN. In-vivo-Analyse zur systemischen Verteilung von metallischen Abriebpartikeln. ACTA ACUST UNITED AC 2006; 144:539-44. [PMID: 16991074 DOI: 10.1055/s-2006-942168] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
AIM The aim of this study was to elucidate whether there is a systemic spread of wear debris from peripherally applied stainless steel and titanium particles into the blood and subsequently to parenchymatous organs. Furthermore, we report on histological findings at the implantation site. METHOD In Syrian Gold hamsters we implanted 2 mm3 wear debris of stainless steel and titanium into the dorsal skin fold chamber. Over a period of 2 weeks we took blood samples and afterwards explanted the implant area, the heart, lung, liver and spleen. One half of the organs and the implant area were used for histological analysis. The other half of the organs and the blood samples were analysed by optical emission spectrometer with inductively coupled plasma and graphite furnace atomic absorption spectrophotometry for their contents of chromium, nickel and titanium. RESULTS In the group with titanium particles, histological analysis of the implant site showed moderate phagocyted wear in granulocytes but no other pathological findings. Animals treated with stainless steel wear debris had a massive inflammatory reaction, in some cases leading to necrosis. The analysis of the blood and one half of the organs showed increased levels of chromium and, already 24 hours after implantation, raised values for nickel. The result of the hamsters treated with titanium showed significantly elevated levels of titanium ions in the organs, but not in the blood samples. Histology of the organs did not reveal pathological findings. CONCLUSION In this study we could show a massive inflammatory reaction for stainless steel wear debris in contrast to titanium wear debris at the implantation site. The elevated blood levels of chromium and increased values of other metals in the organs suggest the haematogenic distribution of ions from the peripherally implanted wear debris.
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Affiliation(s)
- B Burian
- Klinik und Poliklinik für Orthopädie, Rheinische Friedrich-Wilhelms-Universität Bonn, Germany.
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Zerres K, Senderek J, Rudnik-Schöneborn S, Eggermann T, Kunze J, Mononen T, Kääriäinen H, Kirfel J, Moser M, Buettner R, Bergmann C. New options for prenatal diagnosis in autosomal recessive polycystic kidney disease by mutation analysis of the PKHD1 gene. Clin Genet 2005; 66:53-7. [PMID: 15200508 DOI: 10.1111/j.0009-9163.2004.00259.x] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.5] [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: 11/28/2022]
Abstract
Due to the poor prognosis of severe autosomal recessive polycystic kidney disease (ARPKD), there is a strong demand for prenatal diagnosis (PD). Reliable PD testing is possible by molecular genetic analysis only. Although haplotype-based analysis is feasible in most cases, it is associated with a risk of misdiagnosis in families without pathoanatomically proven diagnosis. Linkage analysis is impossible in families where DNA of the index patient is not available. Direct mutation analysis of the recently identified polycystic kidney and hepatic disease 1 gene opens new options in families to whom a reliable PD cannot be offered on the basis of linkage analysis. We for the first time report two cases with PD based on mutation detection, illustrating the new options for PD in ARPKD.
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Affiliation(s)
- K Zerres
- Institute for Human Genetics, Aachen University of Technology, Aachen, Germany.
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22
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Sauter SM, Engel W, Neumann LM, Kunze J, Neesen J. Novel mutations in the Atlastin gene (SPG3A) in families with autosomal dominant hereditary spastic paraplegia and evidence for late onset forms of HSP linked to the SPG3A locus. Hum Mutat 2004; 23:98. [PMID: 14695538 DOI: 10.1002/humu.9205] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.3] [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: 11/11/2022]
Abstract
Hereditary spastic paraplegias (HSP) comprise a genetically and clinically heterogeneous group of neurodegenerative disorders characterised by progressive spasticity and hyperreflexia of the lower limbs. Autosomal dominant hereditary spastic paraplegia linked to the SPG3A locus on chromosome 14q11-21 accounts for approximately 10% of autosomal dominant hereditary spastic paraplegia (ADHSP). It is caused by mutations in the SPG3A gene encoding the protein atlastin. To date, only five disease-causing mutations in the SPG3A gene have been described. We analysed 13 SPG4-negative families for mutations in the SPG3A gene and identified a mutation in 38% (5/13). Two of the mutations are novel, c.481G>C (p.A161P) and c.740A>C (p.H247P). One of the novel mutations was found both in a family with early onset of symptoms and in a late onset family. Furthermore, we report on numerous polymorphisms detected in the SPG3A gene.
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Affiliation(s)
- S M Sauter
- Institute of Human Genetics, University of Göttingen, Germany.
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Abstract
We report a large inbred kindred from Oman with a distinct type of spondyloepiphyseal dysplasia (SED). We evaluated eight individuals from two consanguineous sibships, one male and seven females between the ages of 2 and 22. The pedigrees strongly suggest autosomal recessive inheritance and both families are likely to be related through distant consanguineous loops. The clinical features include near to normal length at birth, short stature with final height of 110-130 cm, shortening of the upper segment due to severe progressive kyphoscoliosis, severe arthritic changes with joint dislocations, rhizomelic limbs, genu valgum, cubitus valgus, mild brachydactyly, camptodactyly, microdontia, and normal intelligence. Minor radiographic metaphyseal changes were found, but major manifestations were in the spine and the epiphyses. During the first year of life the vertebral bodies are of normal height but the endplates are irregular and intervertebral space is narrow. With age, the vertebral endplates become increasingly irregular, the intervertebral space diminishes further and individual vertebrae start to fuse resulting in a severe short trunk dwarfism with kyphoscoliosis. The epiphysis are small and precocious osteoarthropathy was observed involving small and large joints. The elbow, wrist, and hip joints were affected starting in infancy and showed restricted movement. Osteoarthropathy and spinal involvement resulted in physical handicap in early adulthood. Comparison of these patients with other skeletal dysplasias suggests that they represent a previously undescribed variant of SED.
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Affiliation(s)
- A Rajab
- Genetic Unit, DGHA, Ministry of Health, Muscat, Sultanate of Oman
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24
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Rajab A, Khaburi M, Spranger S, Kunze J, Spranger J. Congenital generalized lipodystrophy, mental retardation, deafness, short stature, and slender bones: a newly recognized syndrome? Am J Med Genet A 2003; 121A:271-6. [PMID: 12923870 DOI: 10.1002/ajmg.a.20245] [Citation(s) in RCA: 15] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
We present three patients with congenital generalized lipodystrophy, sensorineural deafness, low birth weight, short stature, delayed cognitive development, and progressive bone changes characterized by overtubulation and rarefaction of long bones with dense metaphyseal striations occurring in adolescence. Abnormalities of lipid and carbohydrate metabolism, hepatosplenomegaly, acanthosis nigricans, and hirsutism were not found. Comparison of the condition of these patients with known syndromic lipodystrophies suggests that they represent a previously unrecognized genetic disorder. The occurrence in sibs born to consanguineous parents and a third patient from the same tribal unit suggest autosomal recessive inheritance.
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Affiliation(s)
- A Rajab
- Genetic Unit, DGHA, Ministry of Health, Muscat, Sultanate of Oman.
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25
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Becker R, Kunze J, Horn D, Gasiorek-Wiens A, Entezami M, Rossi R, Guschmann M, Sarioglu N. Autosomal recessive type of Adams-Oliver syndrome: prenatal diagnosis. Ultrasound Obstet Gynecol 2002; 20:506-510. [PMID: 12423491 DOI: 10.1046/j.1469-0705.2002.00839.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
We report on three pregnancies complicated by Adams-Oliver syndrome in a consanguineous Turkish couple. Two cases were correctly diagnosed prenatally at 22+3 and 13+0 weeks gestation following the first case of Adams-Oliver syndrome in which severe anomalies of the extremities were observed at 26+5 weeks' gestation. In this first case, the diagnosis of Adams-Oliver syndrome was made following termination of pregnancy at 27+2 weeks' gestation. In all three cases, autopsy was performed. All fetuses showed anomalies of the extremities, aplasia cutis and symmetric defects of the skull, with bone being replaced by collagenous tissue. Although there have been numerous cases of the postnatal diagnosis of Adams-Oliver syndrome following termination of pregnancy, this is the first description of the prenatal diagnosis of this disorder.
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Affiliation(s)
- R Becker
- Department of Obstetrics and Gynaecology, Klinikum Benjamin Franklin, Free University of Berlin, Berlin, Germany.
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Horn D, Delaunoy JP, Kunze J. Prenatal diagnosis in Coffin-Lowry syndrome demonstrates germinal mosaicism confirmed by mutation analysis. Prenat Diagn 2001; 21:881-4. [PMID: 11746134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
Coffin-Lowry syndrome is a rare X-linked, semi-dominant mental retardation syndrome resulting from mutations of the ribosomal S6 kinase 2 (RSK2) gene. In the present report, a male patient affected with Coffin-Lowry syndrome is shown to have a nonsense mutation of the RSK2 gene. His unaffected mother does not have this mutation in her lymphocytes. In her third pregnancy prenatal diagnosis by mutation analysis has detected gonadal mosaicism. As this is the second report of germinal mosaicism in Coffin-Lowry syndrome, the finding has important implication for genetic counselling.
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Affiliation(s)
- D Horn
- Institute of Human Genetics, Charité, Humboldt University, Berlin, Germany.
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Guschmann M, Horn D, Entezami M, Urban M, Hänel S, Kunze J, Vogel M. Mesomelic campomelia, polydactyly and Dandy-Walker cyst in siblings. Prenat Diagn 2001; 21:378-82. [PMID: 11360278 DOI: 10.1002/pd.70] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
The present report describes two fetuses, one female and one male, with thus far undescribed skeletal malformations. The mother was a gravida 2, para 0. Both pregnancies were terminated in the second trimester because of multiple congenital anomalies diagnosed ultrasonographically resembling a short rib-polydactyly syndrome. Both fetuses were found to have postaxial hexadactyly of the hands and feet, marked bilateral campomelia of the forearm and shank bones, and a Dandy-Walker cyst. In addition, the fourth ventricle was dilated in the first sibling and the second sibling had an inverse intestinal malrotation. A literature search failed to reveal similar observations.
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Affiliation(s)
- M Guschmann
- Abteilung für Paidopathologie und Placentologie, Institute für Pathologie, Charité, Campus Virchow-Klinikum, Medizinische Fakultät der Humboldt-Universität zu Berlin, Berlin, Germany.
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30
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Demuth I, Wlodarski M, Tipping AJ, Morgan NV, de Winter JP, Thiel M, Gräsl S, Schindler D, D'Andrea AD, Altay C, Kayserili H, Zatterale A, Kunze J, Ebell W, Mathew CG, Joenje H, Sperling K, Digweed M. Spectrum of mutations in the Fanconi anaemia group G gene, FANCG/XRCC9. Eur J Hum Genet 2000; 8:861-8. [PMID: 11093276 DOI: 10.1038/sj.ejhg.5200552] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.0] [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: 11/09/2022] Open
Abstract
FANCG was the third Faconi anaemia gene identified and proved to be identical to the previously cloned XRCC9 gene. We present the pathogenic mutations and sequence variants we have so far identified in a panel of FA-G patients. Mutation screening was performed by PCR, single strand conformational polymorphism analysis and protein truncation tests. Altogether 18 mutations have been determined in 20 families - 97% of all expected mutant alleles. All mutation types have been found, with the exception of large deletions, the large majority is predicted to lead to shortened proteins. One stop codon mutation, E105X, has been found in several German patients and this founder mutation accounts for 44% of the mutant FANCG alleles in German FA-G patients. Comparison of clinical phenotypes shows that patients homozygous for this mutation have an earlier onset of the haematological disorder than most other FA-G patients. The mouse Fancg sequence was established in order to evaluate missense mutations. A putative missense mutation, L71P, in a possible leucine zipper motif may affect FANCG binding of FANCA and seems to be associated with a milder clinical phenotype.
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Affiliation(s)
- I Demuth
- Institute of Human Genetics, Charité, Campus Virchow, Humboldt University, Berlin, Germany
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Hermes B, Grützkau A, Hausser I, Kunze J, Henz BM. Preclinical diagnosis of pseudoxanthoma elasticum - methodological restrictions and ethical problems. Eur J Dermatol 2000; 10:513-6. [PMID: 11056420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Abstract
Pseudoxanthoma elasticum (PXE) is an inherited connective tissue disease. Only recently, mutations in the MRP6 gene on chromosome 16p13.1 have been identified in PXE families. Up to now, predictive testing has not been available. Since ultrastructural connective tissue alterations in overtly normal skin of predilection sites have supported preclinical diagnosis in children of affected individuals, we have screened the daughters of a PXE patient for these alterations. The patient's biopsy from lesional skin revealed elastin and collagen fibril abnormalities, but biopsies from the clinically inconspicuous daughters showed only ultrastructural alterations of collagen fibrils. These findings are inconclusive regarding the diagnosis of PXE in the daughters. Predictive or preclinical diagnosis of incurable, late-onset disorders creates complex social, ethical, and legal problems which call for special management strategies.
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Affiliation(s)
- B Hermes
- Department of Dermatology, Krankenhaus Neukölln, Rudower Str. 48, D-12351 Berlin, Germany.
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32
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Horn D, Krebsová A, Kunze J, Reis A. Homozygosity mapping in a family with microcephaly, mental retardation, and short stature to a Cohen syndrome region on 8q21.3-8q22.1: redefining a clinical entity. Am J Med Genet 2000; 92:285-92. [PMID: 10842298] [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: 04/14/2023]
Abstract
A syndrome of microcephaly, progressive postnatal growth deficiency, and mental retardation was observed in two brothers and their cousin from a multiply consanguineous kindred of Lebanese descent. Hypotonia, chorioretinal dystrophy, and myopia were also identified. The severity of the condition varied among the closely related patients. Because of absence of a distinctive facial appearance, the degree of mental retardation, and short stature, the initially considered clinical diagnosis of Cohen syndrome was withdrawn and a novel genetic entity was assumed. Homozygosity mapping in this family assigned the gene to a 26.8-cM region on the chromosome band 8q21.3 -22.1, between the microsatellites at D8S270 and D8S514. The maximum two-point LOD score was found for marker at D8S267 (Zmax=3.237 at Omax=0.00). Intriguingly enough, the identified gene region overlaps the refined gene region for Cohen syndrome (COH1) [Kolehmainen et al., 1997: Euro J Hum Genet 5:206-213]. This fact encourages the hypothesis that the described kindred segregates for a variant of Cohen syndrome and suggests a redefinition of its phenotype.
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Affiliation(s)
- D Horn
- Institute of Human Genetics, Charité, Humboldt University, Berlin, Germany
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Abstract
Insect navigation is thought to be based on an egocentric reference system which relates vector information derived from path integration to views of landmarks experienced en route and at the goal. Here we show that honeybees also possess an allocentric form of spatial memory which allows localization of multiple places relative to the intended goal, the hive. The egocentric route memory, which is called the specialized route memory (SRM) here, initially dominates navigation when an animal is first trained to a feeding site and then released at an unexpected site and this is why it is the only reference system detected so far in experiments with bees. However, the SRM can be replaced by an allocentric spatial memory called the general landscape memory (GLM). The GLM is directly accessible to the honeybee (and to the experimenter) if no SRM exists, for example, if bees were not trained along a route before testing. Under these conditions bees return to the hive from all directions around the hive at a speed comparable to that of an equally long flight along a trained route. The flexible use of the GLM indicates that bees may store relational information on places, connections between landmarks and the hive and/or views of landmarks from different directions and, thus, the GLM may have a graph structure, at least with respect to one goal, i.e. the hive.
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Affiliation(s)
- R Menzel
- Institut für Neurobiologie, Freie Universität Berlin, Germany.
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Becker R, Wegner RD, Kunze J, Runkel S, Vogel M, Entezami M. Clinical variability of Larsen syndrome: diagnosis in a father after sonographic detection of a severely affected fetus. Clin Genet 2000; 57:148-50. [PMID: 10735637 DOI: 10.1034/j.1399-0004.2000.570210.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [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: 11/23/2022]
Abstract
Larsen syndrome shows a broad spectrum of clinical manifestation ranging from a lethal form of the disorder to a mild clinical expression with absence of major diagnostic features. Here we show that even intrafamilial manifestation may vary extremely to the point that Larsen syndrome in a father has been diagnosed only by typical sonographic features in an affected fetus.
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Affiliation(s)
- R Becker
- Free University of Berlin, Klinikum Benjamin Franklin, Germany
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35
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Kunze J, Koelling S, Reich M, Wimmer MA. Use of ultrasonic nebulizer with desolvator membrane for the determination of titanium and zirconium in human serum by means of inductively coupled plasma--mass spectroscopy. Fresenius J Anal Chem 2000; 366:165-6. [PMID: 11225920 DOI: 10.1007/s002160050031] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
A technique for the determination of titanium and zirconium in human blood serum, after pressurized digestion utilizing ICP-MS coupled to an ultrasonic nebulizer (USN) and desolvating membrane is described. As no CRM for titanium is available, zirconium has been determined in order to demonstrate the accuracy of the technique, as the limits in blood are well known. Bone cement consists basically of a polymer, namely polymethylmethacrylate (PMMA). For better X-ray contrast some manufacturers use incorporated ZrO2 with a volume fraction of 10 to 15%. Thus, the zirconium present in the PMMA matrix can be used as an indicator for the PMMA particulate debris.
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Affiliation(s)
- J Kunze
- Central Laboratory of Analytical Chemistry, Technical University Hamburg-Harburg, Germany
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36
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Schiller S, Spranger S, Schechinger B, Fukami M, Merker S, Drop SL, Tröger J, Knoblauch H, Kunze J, Seidel J, Rappold GA. Phenotypic variation and genetic heterogeneity in Léri-Weill syndrome. Eur J Hum Genet 2000; 8:54-62. [PMID: 10713888 DOI: 10.1038/sj.ejhg.5200402] [Citation(s) in RCA: 104] [Impact Index Per Article: 4.3] [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: 11/09/2022] Open
Abstract
Léri-Weill syndrome (LWS) or dyschondrosteosis represents a short stature syndrome characterised by the mesomelic shortening of the forearms and lower legs and by bilateral Madelung deformity of the wrists. Recently, mutations in the pseudoautosomal homeobox gene SHOX have been shown to be causative for this disorder. This gene has previously been described as the short stature gene implicated in Turner syndrome (TS). We studied 32 Léri-Weill patients from 18 different German and Dutch families and present clinical, radiological and molecular data. Phenotypic inter- and intrafamilial heterogeneity is a frequent finding in LWS, and phenotypic manifestations are generally more severe in females. In males, muscular hypertrophy is a frequent finding. To test for SHOX mutations we used FISH, Southern blot and SSCP analysis as well as long-range PCR and sequencing. We identified (sub)microscopic deletions encompassing the SHOX gene region in 10 out of 18 families investigated. Deletion sizes varied between 100 kb and 9 Mb and did not correlate with the severity of the phenotype. We did not detect SHOX mutations in almost half (41%) the LWS families studied, which suggests different genetic etiologies.
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Affiliation(s)
- S Schiller
- Institute of Human Genetics, Ruprecht-Karls University, Heidelberg, Germany
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37
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Guschmann M, Horn D, Gasiorek-Wiens A, Urban M, Kunze J, Vogel M. Ellis-van Creveld syndrome: examination at 15 weeks' gestation. Prenat Diagn 1999; 19:879-83. [PMID: 10521851] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023]
Abstract
In 1940, Ellis and van Creveld defined a syndrome they referred to as chondro-ectodermal dysplasia. This autosomal recessive condition, now usually referred to as Ellis-van Creveld syndrome (EVC), comprises bilateral postaxial polydactyly, a chondrodysplasia, characterized by shortness of limbs, and ectodermal dysplasia. Congenital heart defects are also common. There are many reports in medical literature describing affected newborns and even, older children. Here, we report the clinical, radiological and histological findings in a 15-week-old affected fetus. The diagnosis of Ellis-van Creveld syndrome in this fetus is based on a positive family history (an affected sib) and shortness of long bones as well as hexadactyly diagnosed by prenatal ultrasonography. On post-mortem examination, bilateral postaxial hexadactyly and symmetrical shortness of the long bones was noted. Histologically, there was too short a zone of cartilagineous columns in the metaphyses, a reduced number of chondrocytes and an irregularly structured spongiosa within the ossification zone. In addition, the fetus was found to have an atrio-ventricular canal. This heart defect is presumably rare in this syndrome. Other characteristic features such as small and dysplastic nails, sparse hair and abnormalities of the teeth were, of course, not yet present in this early developmental stage. In addition to EVC, the fetus had a 47,XXY chromosome constitution.
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Affiliation(s)
- M Guschmann
- Department of Paidopathology and Placentology, Charité Hospital, Medical Faculty of Humboldt University, Berlin, Germany.
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Kalff-Suske M, Wild A, Topp J, Wessling M, Jacobsen EM, Bornholdt D, Engel H, Heuer H, Aalfs CM, Ausems MG, Barone R, Herzog A, Heutink P, Homfray T, Gillessen-Kaesbach G, König R, Kunze J, Meinecke P, Müller D, Rizzo R, Strenge S, Superti-Furga A, Grzeschik KH. Point mutations throughout the GLI3 gene cause Greig cephalopolysyndactyly syndrome. Hum Mol Genet 1999; 8:1769-77. [PMID: 10441342 DOI: 10.1093/hmg/8.9.1769] [Citation(s) in RCA: 97] [Impact Index Per Article: 3.9] [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: 11/14/2022] Open
Abstract
Greig cephalopolysyndactyly syndrome, characterized by craniofacial and limb anomalies (GCPS; MIM 175700), previously has been demonstrated to be associated with translocations as well as point mutations affecting one allele of the zinc finger gene GLI3. In addition to GCPS, Pallister-Hall syndrome (PHS; MIM 146510) and post-axial polydactyly type A (PAP-A; MIM 174200), two other disorders of human development, are caused by GLI3 mutations. In order to gain more insight into the mutational spectrum associated with a single phenotype, we report here the extension of the GLI3 mutation analysis to 24 new GCPS cases. We report the identification of 15 novel mutations present in one of the patient's GLI3 alleles. The mutations map throughout the coding gene regions. The majority are truncating mutations (nine of 15) that engender prematurely terminated protein products mostly but not exclusively N-terminally to or within the central region encoding the DNA-binding domain. Two missense and two splicing mutations mapping within the zinc finger motifs presumably also interfere with DNA binding. The five mutations identified within the protein regions C-terminal to the zinc fingers putatively affect additional functional properties of GLI3. In cell transfection experiments using fusions of the DNA-binding domain of yeast GAL4 to different segments of GLI3, transactivating capacity was assigned to two adjacent independent domains (TA(1)and TA(2)) in the C-terminal third of GLI3. Since these are the only functional domains affected by three C-terminally truncating mutations, we postulate that GCPS may be due either to haploinsufficiency resulting from the complete loss of one gene copy or to functional haploinsufficiency related to compromised properties of this transcription factor such as DNA binding and transactivation.
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Affiliation(s)
- M Kalff-Suske
- Medizinisches Zentrum für Humangenetik, Philipps-Universität Marburg, D-35037 Marburg, Germany
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Affiliation(s)
- A. Gumbert
- Institutfur Meurobwlogie, Freie Umversitat Berlin, Komgin Luise Strasse 28–30, 14195 Berlin, Germany
| | - J. Kunze
- Institutfur Meurobwlogie, Freie Umversitat Berlin, Komgin Luise Strasse 28–30, 14195 Berlin, Germany
| | - L. Chittka
- Biozentrum, Zoologie II, Am Hubland, 97074 WurZburg, Germany
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Superti-Furga A, Neumann L, Riebel T, Eich G, Steinmann B, Spranger J, Kunze J. Recessively inherited multiple epiphyseal dysplasia with normal stature, club foot, and double layered patella caused by a DTDST mutation. J Med Genet 1999; 36:621-4. [PMID: 10465113 PMCID: PMC1762965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
We have observed over 25 different mutations in the diastrophic dysplasia sulphate transporter gene (DTDST) in association with the recessive disorders achondrogenesis 1B, atelosteogenesis 2, and diastrophic dysplasia. The c862t (R279W) transition is the most common mutation in non-Finnish patients, but in these disorders it is usually combined with other DTDST mutations. We had not seen a case of homozygosity for c862t (R279W) until we analysed DNA from a 36 year old male with tall-normal stature (180 cm) who asked for genetic counselling for suspected multiple epiphyseal dysplasia. He was treated for club foot and hip dysplasia at birth. Skeletal changes consistent with multiple epiphyseal dysplasia, with the peculiar finding of a double layered patella, were recognised during childhood. Cleft palate, swelling of the ear pinna, and hitch hiker thumb were absent. He was found to be homozygous, and both healthy parents heterozygous, for the R279W mutation in DTDST, and his fibroblasts showed a sulphate incorporation defect typical of DTDST disorders. Counselling was given for a recessive disorder, thereby considerably reducing the probability of affected offspring. Multiple epiphyseal dysplasia is more frequently caused by dominant mutations in the COMP (EDM1, McKusick 132400) and COL9A2 genes (EDM2, McKusick 600204). A few other patients and families with features similar to our proband have been described previously and considered to have autosomal recessive MED (EDM4, McKusick 226900). This observation confirms the existence of this entity and assigns it to the phenotypic spectrum associated with mutations at the DTDST locus.
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Affiliation(s)
- A Superti-Furga
- Division of Metabolic and Molecular Diseases, University Children's Hospital, Zurich, Switzerland.
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Abstract
BACKGROUND In the Fontan circulation the vis a tergo for lung perfusion is limited. The hypothesis of this in vitro study was that energy dissipation at the common cavopulmonary connection can be reduced by the addition of caval curvature. METHODS Two Perspex models were analyzed, the commonly used crosslike cavopulmonary connection (model 1) and a modified curved configuration (model 2). Pressures and flows across the connections were measured simultaneously at various caval and pulmonary artery flow splits and resistances. Mixing of inferior and superior caval fluid was evaluated. RESULTS Caval pressure oscillations occurred in model 1 only. Curvature reduced power losses in all settings significantly (alpha = 0.05), most successfully at adult caval flow ratios and at high flow rates. At equal pulmonary resistances pulmonary flow was balanced in both models. The inferior caval fluid is preferably directed to the right lung in model 2 predominantly for caval flow conditions in younger patients. CONCLUSIONS Our data show that the modified curved cavopulmonary connection is hydrodynamically advantageous but might impair caval fluid mixing in younger children.
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Affiliation(s)
- A Gerdes
- Department of Cardiac Surgery, Medical University of Lübeck, Germany
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Abstract
We describe a family with two marriages of first cousins and a total of five children with opsismodysplasia. The diagnosis was based on clinical, radiological, and immunhistochemical findings. Helpful to the diagnosis was the testing with type I collagen antibodies, showing abnormally high levels in the hypertrophic area of growth cartilage. This observation supports the hypothesis of autosomal recessive transmission of opsismodysplasia.
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Affiliation(s)
- K Tyler
- Kinderklinik, Institut für Humangenetik, Humboldt-Universität zu Berlin, Germany
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Mildenberger E, Lennert T, Kunze J, Jandeck C, Waldherr R, Versmold H. Diffuse mesangial sclerosis: association with unreported congenital anomalies and placental enlargement. Acta Paediatr 1998; 87:1301-3. [PMID: 9894834 DOI: 10.1080/080352598750031022] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [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: 09/30/2022]
Abstract
A case of diffuse mesangial sclerosis (DMS) associated with a number of undescribed congenital anomalies is reported. The occurrence of additional anomalies, especially ocular anomalies, is a common finding in DMS. However, neither megalocornea, Dandy-Walker malformation, postaxial hexadactyly, rocker-bottom feet, nor atrial septal defect, as observed in our patient, has been reported previously in association with DMS. This case might be considered an atypical manifestation of the Galloway-Mowat syndrome. In contrast to most cases of DMS, the patient revealed intrauterine proteinuria as the placenta was enlarged to 31% of birth weight. This case demonstrates that the large placenta, >25% of birth weight, is not only pathognomonic of the congenital nephrotic syndrome of the Finnish type but can also occur in DMS.
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Affiliation(s)
- E Mildenberger
- Department of Paediatrics, Universitätsklinikum Benjamin Franklin, Freie Universität, Berlin, Germany
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Abstract
Published cases of familial unilateral terminal transverse defects are scarce. We report on a morphologically similar defect of the hand in a father and his daughter. The hand anomaly is similar in both, but on the opposite side. Thalidomide was taken in the sensitive period of the pregnancy by the father's mother. To our knowledge this is the second description of unilateral terminal aphalangia in successive generations. In order to evaluate the possible genetic basis we analyze epidemiological studies in respect to the recurrence risk of cases with isolated limb reduction defects. We compare reports of familial occurrence concerning the degree of relationship as well as the pattern of malformation. The latter seems to be an important aspect from an evolutionary and a developmental viewpoint. For our observation an autosomal dominant transmission is the most likely although multifactorial determination cannot be excluded.
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Affiliation(s)
- L Neumann
- Institute of Human Genetics and University Children's Hospital, Charité Campus Virchow-Klinikum, Humboldt University of Berlin, Germany
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Kunze J, Wimmer MA, Koelling S, Schneider E. Determination of titanium and zirconium wear debris in blood serum by means of HNO 3 /HF pressurized digestion using ICP - optical emission spectrometry. ACTA ACUST UNITED AC 1998. [DOI: 10.1007/s002160050932] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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48
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Abstract
BACKGROUND In the Fontan circulation, energy consumption at the cavopulmonary connection is crucial. Our hypothesis was that a modification of the standard Norwood variant of cavopulmonary connection with an extended anastomosis would improve hydrodynamics. METHODS The in vitro hydrodynamics of two different Perspex glass models resembling the Norwood variant of cavopulmonary connection (model I) and the modification (model II) were analyzed in a mock circulation at nonpulsatile flows of 2 to 5 L/min to simulate rest and exercise. The pulmonary flow split was varied to imitate varying lung resistances. Inferior-to-superior caval flow ratio and size of models were increased to simulate growth. RESULTS The pulmonary flow was preferentially directed to the left lung in model I and was better balanced in model II. Power losses increased exponentially with total flow in both models and were markedly higher in model I. These differences were attenuated in the larger models. Anastomotic turbulences were larger in model I. Power losses in both models were relatively insensitive to changes in pulmonary flow split. CONCLUSIONS The proposed modification of the Norwood variant of cavopulmonary connection seems to be hydrodynamically advantageous and warrants further evaluation.
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Affiliation(s)
- H H Sievers
- Department of Cardiac Surgery, Medical University of Lübeck, Germany.
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Abstract
Advances in ultrasound technology and sonographer's experience lead to the description of many rare syndromes and malformations through prenatal diagnosis. Diaphragmatic hernia is a rather common malformation but can be an indicator of different syndromes. We report the prenatal diagnosis of lethal multiple pterygium syndrome type II which has been established in the 34th week of pregnancy. The sonographically detectable symptoms consisted of polyhydramnios, hygroma colli, diaphragmatic hernia, scoliosis, short forearms, hypokinesia of the fetus and pterygia over the large joints. Labour was induced in the 34th week of pregnancy; the neonate died shortly after vaginal delivery as a result of the pulmonary hypoplasia. A multidisciplinary approach in prenatal assessment may help to clarify difficult diagnostic problems and may be of direct benefit for the pregnant patient.
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Affiliation(s)
- M Entezami
- Department of Gynecology, University Medical Center Benjamin Franklin, Free University of Berlin, Germany.
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Gieseler F, Nüssler V, Brieden T, Kunze J, Valsamas S. Intracellular pharmacokinetics of anthracyclines in human leukemia cells: correlation of DNA-binding with apoptotic cell death. Int J Clin Pharmacol Ther 1998; 36:25-8. [PMID: 9476145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Anthracyclines are major components of the most therapeutical strategies in hematological oncology. These drugs are not directly cytotoxic but induce apoptosis. Due to their lipophilicity, anthracyclines are rapidly distributed in myeloid and lymphatic leukemia cells. Within 20 min after treatment, daunorubicin and idarubicin are found to intercalate into DNA. Shortly after treatment, DNA damage occurs and increases within 3 hours. Apoptosis can be monitored 12-24 hours after treatment, at this timepoint the majority of DNA strand breaks have already been repaired. A statistically highly significant linear correlation could be established between the DNA binding rate of anthracyclines and the resulting cell death. This indicates that DNA binding is a prerequisite for the induction of apoptosis. With respect to cellular resistance mechanisms, 2 different pharmacodynamic phases can be distinguished: intracellular distribution and cellular reaction. The endpoint of the "distribution phase" is marked by the DNA intercalation of the anthracyclines. Cellular resistance mechanisms which decrease the DNA binding include membrane transport mechanisms and vesicular trapping of the drugs. The "reaction phase" might be disturbed by complex antiapoptotic mechanisms. The assessment of DNA binding in malignant cells during or shortly after treatment with anthracyclines might be a useful tool to distinguish cellular resistance mechanisms.
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Affiliation(s)
- F Gieseler
- University Hospital, Medizinische Poliklinik, Würzburg, Germany
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