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Landfeldt E, Alemán A, Abner S, Zhang R, Werner C, Tomazos I, Ferizovic N, Lochmüller H, Kirschner J. Predictors of Loss of Ambulation in Duchenne Muscular Dystrophy: A Systematic Review and Meta-Analysis. J Neuromuscul Dis 2024; 11:579-612. [PMID: 38669554 DOI: 10.3233/jnd-230220] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/28/2024]
Abstract
Objective The objective of this study was to describe predictors of loss of ambulation in Duchenne muscular dystrophy (DMD). Methods This systematic review and meta-analysis included searches of MEDLINE ALL, Embase, and the Cochrane Database of Systematic Reviews from January 1, 2000, to December 31, 2022, for predictors of loss of ambulation in DMD. Search terms included "Duchenne muscular dystrophy" as a Medical Subject Heading or free text term, in combination with variations of the term "predictor". Risk of bias was assessed using the Newcastle-Ottawa Scale. We performed meta-analysis pooling of hazard ratios of the effects of glucocorticoids (vs. no glucocorticoid therapy) by fitting a common-effect inverse-variance model. Results The bibliographic searches resulted in the inclusion of 45 studies of children and adults with DMD from 17 countries across Europe, Asia, and North America. Glucocorticoid therapy was associated with delayed loss of ambulation (overall meta-analysis HR deflazacort/prednisone/prednisolone: 0.44 [95% CI: 0.40-0.48]) (n = 25 studies). Earlier onset of first signs or symptoms, earlier loss of developmental milestones, lower baseline 6MWT (i.e.,<350 vs. ≥350 metres and <330 vs. ≥330 metres), and lower baseline NSAA were associated with earlier loss of ambulation (n = 5 studies). Deletion of exons 3-7, proximal mutations (upstream intron 44), single exon 45 deletions, and mutations amenable of skipping exon 8, exon 44, and exon 53, were associated with prolonged ambulation; distal mutations (intron 44 and downstream), deletion of exons 49-50, and mutations amenable of skipping exon 45, and exon 51 were associated with earlier loss of ambulation (n = 13 studies). Specific single-nucleotide polymorphisms in CD40 gene rs1883832, LTBP4 gene rs10880, SPP1 gene rs2835709 and rs11730582, and TCTEX1D1 gene rs1060575 (n = 7 studies), as well as race/ethnicity and level of family/patient deprivation (n = 3 studies), were associated with loss of ambulation. Treatment with ataluren (n = 2 studies) and eteplirsen (n = 3 studies) were associated with prolonged ambulation. Magnetic resonance biomarkers (MRI and MRS) were identified as significant predictors of loss of ambulation (n = 6 studies). In total, 33% of studies exhibited some risk of bias. Conclusion Our synthesis of predictors of loss of ambulation in DMD contributes to the understanding the natural history of disease and informs the design of new trials of novel therapies targeting this heavily burdened patient population.
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Affiliation(s)
| | - A Alemán
- Department of Pediatrics, Division of Neurology, Children's Hospital of Eastern Ontario, Research Institute, University of Ottawa, Ottawa, ON, Canada
- Department of Medicine, Division of Neurology, The Ottawa Hospital, Brain and Mind Research Institute, University of Ottawa, Ottawa, Canada
| | | | - R Zhang
- PTC Therapeutics Sweden AB, Askim, Sweden
| | - C Werner
- PTC Therapeutics Germany GmbH, Frankfurt, Germany
| | - I Tomazos
- PTC Therapeutics Inc, South Plainfield, NJ, USA
| | | | - H Lochmüller
- Department of Pediatrics, Division of Neurology, Children's Hospital of Eastern Ontario, Research Institute, University of Ottawa, Ottawa, ON, Canada
- Department of Neuropediatrics and Muscle Disorders, Medical Center, University of Freiburg, Faculty of Medicine, Freiburg, Germany
- Department of Medicine, Division of Neurology, The Ottawa Hospital, Brain and Mind Research Institute, University of Ottawa, Ottawa, Canada
| | - J Kirschner
- Department of Neuropediatrics and Muscle Disorders, Medical Center, University of Freiburg, Faculty of Medicine, Freiburg, Germany
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Chiriboga C, Servais L, Baranello G, Darras B, Day J, Deconinck N, Farrar M, Finkel R, Bertini E, Kirschner J, Masson R, Mazurkiewicz-Bełdzińska M, Vlodavets D, Bader-Weder S, Gorni K, Jaber B, McIver T, Papp G, Scalco R, Mercuri E. P.113 Safety update: Risdiplam clinical trial development program. Neuromuscul Disord 2022. [DOI: 10.1016/j.nmd.2022.07.198] [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: 11/07/2022]
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Kirschner J, Crawford T, Ryan M, Finkel R, Swoboda K, De Vivo D, Bertini E, Hwu H, Sansone V, Pechmann A, Montes J, Krasinski D, Chin R, Berger Z, Zhu C, Raynaud S, Paradis A, Johnson N. VP.51 Impact of nusinersen on caregiver experience and health-related quality of life (HRQoL) when initiated in the presymptomatic stage of SMA in NURTURE. Neuromuscul Disord 2022. [DOI: 10.1016/j.nmd.2022.07.205] [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: 11/05/2022]
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Servais L, Benguerba K, De Vivo D, Kirschner J, Muntoni F, Proud C, Tizzano E, Saito K, Raju D, LaMarca N, Sun R, Anderson F, Faulkner E, Finkel R. P.105 Safety and effectiveness of onasemnogene abeparvovec (OA) alone or with other disease-modifying therapies (DMTs): Findings from RESTORE. Neuromuscul Disord 2022. [DOI: 10.1016/j.nmd.2022.07.190] [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: 11/06/2022]
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Schorling D, Kölbel H, Hentschel A, Pechmann A, Meyer N, Wirth B, Rombo R, Consortium ASMA, Sickmann A, Kirschner J, Schara-Schmidt U, Lochmüller H, Roos A. VP.20 Cathepsin D as biomarker in CSF of nusinersen-treated patients with spinal muscular atrophy. Neuromuscul Disord 2022. [DOI: 10.1016/j.nmd.2022.07.097] [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: 11/07/2022]
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Day J, Deconinck N, Mazzone E, Nascimento A, Oskoui M, Saito K, Vuillerot C, Baranello G, Boespflug-Tanguy O, Goemans N, Kirschner J, Kostera-Pruszczyk A, Servais L, Braid J, Gerber M, Gorni K, Martin C, Scalco R, Yeung W, Mercuri E. P.114 SUNFISH parts 1 and 2: 3-year efficacy and safety of risdiplam in types 2 and 3 spinal muscular atrophy (SMA). Neuromuscul Disord 2022. [DOI: 10.1016/j.nmd.2022.07.199] [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: 11/06/2022]
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Strazdaite S, Roeters SJ, Sakalauskas A, Sneideris T, Kirschner J, Pedersen KB, Schiøtt B, Jensen F, Weidner T, Smirnovas V, Niaura G. Interaction of Amyloid-β-(1-42) Peptide and Its Aggregates with Lipid/Water Interfaces Probed by Vibrational Sum-Frequency Generation Spectroscopy. J Phys Chem B 2021; 125:11208-11218. [PMID: 34597059 DOI: 10.1021/acs.jpcb.1c04882] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In this study, we use surface-sensitive vibrational sum-frequency generation (VSFG) spectroscopy to investigate the interaction between model lipid monolayers and Aβ(1-42) in its monomeric and aggregated states. Combining VSFG with atomic force microscopy (AFM) and thioflavin T (ThT) fluorescence measurements, we found that only small aggregates with probably a β-hairpin-like structure adsorbed to the zwitterionic lipid monolayer (DOPC). In contrast, larger aggregates with an extended β-sheet structure adsorbed to a negatively charged lipid monolayer (DOPG). The adsorption of small, initially formed aggregates strongly destabilized both monolayers, but only the DOPC monolayer was completely disrupted. We showed that the intensity of the amide-II' band in achiral (SSP) and chiral (SPP) polarization combinations increased in time when Aβ(1-42) aggregates accumulated at the DOPG monolayer. Nevertheless, almost no adsorption of preformed mature fibrils to DOPG monolayers was detected. By performing spectral VSFG calculations, we revealed a clear correlation between the amide-II' signal and the degree of amyloid aggregates (e.g., oligomers or (proto)fibrils) of various Aβ(1-42) structures. The calculations showed that only structures with a significant amyloid β-sheet content have a strong amide-II' intensity, in line with previous Raman studies. The combination of the presented results substantiates the amide-II(') band as a legitimate amyloid marker.
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Affiliation(s)
- S Strazdaite
- Department of Organic Chemistry, Center for Physical Sciences and Technology, Sauletekio Ave. 3, Vilnius LT-10257, Lithuania
| | - S J Roeters
- Department of Chemistry, Aarhus University, Langelandsgade 140, 8000 Aarhus C, Denmark
| | - A Sakalauskas
- Institute of Biotechnology, Life Sciences Center, Vilnius University, Sauletekio 7, LT-10257 Vilnius, Lithuania
| | - T Sneideris
- Institute of Biotechnology, Life Sciences Center, Vilnius University, Sauletekio 7, LT-10257 Vilnius, Lithuania
| | - J Kirschner
- Institute of Solid State Physics, TU Wien, Wiedner Hauptstrasse 8-10, 1040 Vienna, Austria
| | - K B Pedersen
- Department of Chemistry, Aarhus University, Langelandsgade 140, 8000 Aarhus C, Denmark
| | - B Schiøtt
- Department of Chemistry, Aarhus University, Langelandsgade 140, 8000 Aarhus C, Denmark
| | - F Jensen
- Department of Chemistry, Aarhus University, Langelandsgade 140, 8000 Aarhus C, Denmark
| | - T Weidner
- Department of Chemistry, Aarhus University, Langelandsgade 140, 8000 Aarhus C, Denmark
| | - V Smirnovas
- Institute of Biotechnology, Life Sciences Center, Vilnius University, Sauletekio 7, LT-10257 Vilnius, Lithuania
| | - G Niaura
- Department of Organic Chemistry, Center for Physical Sciences and Technology, Sauletekio Ave. 3, Vilnius LT-10257, Lithuania
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Chiriboga C, Bruno C, Duong T, Fischer D, Kirschner J, Mercuri E, Gerber M, Gorni K, Kletzl H, Carruthers I, Martin C, Warren F, Scoto M. SMA - TREATMENT. Neuromuscul Disord 2021. [DOI: 10.1016/j.nmd.2021.07.304] [Citation(s) in RCA: 1] [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: 11/26/2022]
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Tulinius M, Buccella F, Desguerre I, Kirschner J, Mercuri E, Muntoni F, Osorio AN, Johnson S, Werner C, Kristensen A, Jiang J, Li J, Trifillis P, Santos C, McDonald C. DMD - TREATMENT. Neuromuscul Disord 2021. [DOI: 10.1016/j.nmd.2021.07.169] [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]
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Servais L, De Vivo D, Kirschner J, Mercuri E, Muntoni F, Tizzano E, Roy S, Saito K, Menier M, LaMarca N, Anderson F, Dabbous O, Finkel R. SMA - TREATMENT. Neuromuscul Disord 2021. [DOI: 10.1016/j.nmd.2021.07.314] [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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Mercuri E, Muntoni F, Buccella F, Desguerre I, Kirschner J, Osorio AN, Tulinius M, Johnson S, Werner C, Kristensen A, Jiang J, Li J, Trifillis P, Santos C, McDonald C. DMD - TREATMENT. Neuromuscul Disord 2021. [DOI: 10.1016/j.nmd.2021.07.167] [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]
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Schorling DC, Müller CK, Pechmann A, Borell S, Rosenfelder S, Kölbel H, Schara U, Zieger B, Kirschner J. Impaired secretion of platelet granules in patients with Duchenne muscular dystrophy - results of a prospective diagnostic study. Neuromuscul Disord 2020; 31:35-43. [PMID: 33309480 DOI: 10.1016/j.nmd.2020.11.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2020] [Revised: 10/29/2020] [Accepted: 11/09/2020] [Indexed: 01/14/2023]
Abstract
A tendency to bleed during scoliosis surgery has been reported repeatedly in Duchenne muscular dystrophy (DMD) and diagnostic studies show a prolonged bleeding time. The pathophysiological background is still not fully understood. The short dystrophin isoform dp71 is expressed in platelets and mediates contractile properties. We performed a bicentric, non-blinded, prospective diagnostic study in 53 patients with confirmed DMD. Extensive laboratory analyses included platelet aggregometry and platelet flow cytometry, as well as routine coagulation analyses. Results of laboratory diagnostics were correlated with clinical data. Patients were subgrouped and analyzed according to ambulatory status and cardiac involvement. Platelet aggregation was reduced after stimulation with ADP (adenosine triphosphate) [60%; reference range 66-84%]. In addition, in the DMD cohort the expression of platelet activation markers CD62 and CD63 (flow cytometry analyses) was significantly lower than in healthy controls, most prominent in non-ambulatory patients with cardiac involvement. There was no clear association with the location of the underlying mutations in the dystrophin gene. No further abnormalities were identified regarding primary or secondary hemostasis. This study shows that platelets of patients with DMD have decreased expression of CD62 and CD63 which are markers for platelet granule release. This may indicate that patients with DMD have an impaired platelet granule secretion which may explain to some extent the increased bleeding, especially in mucocutaneous areas and perioperatively.
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Affiliation(s)
- D C Schorling
- Department of Neuropediatrics and Muscle Disorders, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Mathildenstraße 1, 79106 Freiburg, Germany.
| | - C K Müller
- Department of Neuropediatrics and Muscle Disorders, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Mathildenstraße 1, 79106 Freiburg, Germany
| | - A Pechmann
- Department of Neuropediatrics and Muscle Disorders, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Mathildenstraße 1, 79106 Freiburg, Germany
| | - S Borell
- Department of Neuropediatrics and Muscle Disorders, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Mathildenstraße 1, 79106 Freiburg, Germany
| | - S Rosenfelder
- Division of Pediatric Hematology and Oncology, Department of Pediatrics and Adolescent Medicine - University of Freiburg, Faculty of Medicine, University of Freiburg, Mathildenstraße 1, 79106 Freiburg, Germany
| | - H Kölbel
- Department of Pediatric Neurology, Developmental Neurology and Social Pediatrics, University of Duisburg-Essen, Hufelandstraße 55, 45147 Essen, Germany
| | - U Schara
- Department of Pediatric Neurology, Developmental Neurology and Social Pediatrics, University of Duisburg-Essen, Hufelandstraße 55, 45147 Essen, Germany
| | - B Zieger
- Division of Pediatric Hematology and Oncology, Department of Pediatrics and Adolescent Medicine - University of Freiburg, Faculty of Medicine, University of Freiburg, Mathildenstraße 1, 79106 Freiburg, Germany
| | - J Kirschner
- Department of Neuropediatrics and Muscle Disorders, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Mathildenstraße 1, 79106 Freiburg, Germany; Department of Neuropediatrics, University Hospital Bonn, Venusberg-Campus 1, 53127 Bonn, Germany
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Muntoni F, Mercuri E, Buccella F, Desguerre I, Kirschner J, Osorio AN, Tulinius M, Jiang J, Kristensen A, Johnson S, Able R, Trifillis P, Santos C. DMD & BMD – CLINICAL. Neuromuscul Disord 2020. [DOI: 10.1016/j.nmd.2020.08.057] [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: 10/23/2022]
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Chiriboga C, Bruno C, Duong T, Fischer D, Kirschner J, Mercuri E, Gerber M, Gorni K, Kletzl H, McIver T, Scalco R, Warren F, Scoto M. SMA – THERAPY. Neuromuscul Disord 2020. [DOI: 10.1016/j.nmd.2020.08.272] [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]
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Day J, Baranello G, Boespflug-Tanguy O, Borell S, Goemans N, Kirschner J, Masson R, Pera M, Servais L, Fuhrer S, Gerber M, Gorni K, Kletzl H, Martin C, Scalco R, Staunton H, Yeung W, Mercuri E. SMA – THERAPY. Neuromuscul Disord 2020. [DOI: 10.1016/j.nmd.2020.08.262] [Citation(s) in RCA: 1] [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: 11/25/2022]
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Pechmann A, Bernert G, Hagenacker T, Müller-Felber W, Schara U, Schwersenz I, Walter M, Lochmüller H, Kirschner J. SMA: REGISTRIES, BIOMARKERS & OUTCOME MEASURES. Neuromuscul Disord 2020. [DOI: 10.1016/j.nmd.2020.08.174] [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: 10/23/2022]
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Strazdaite S, Navakauskas E, Kirschner J, Sneideris T, Niaura G. Structure Determination of Hen Egg-White Lysozyme Aggregates Adsorbed to Lipid/Water and Air/Water Interfaces. Langmuir 2020; 36:4766-4775. [PMID: 32251594 DOI: 10.1021/acs.langmuir.9b03826] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
We use vibrational sum-frequency generation (VSFG) spectroscopy to study the structure of hen egg-white lysozyme (HEWL) aggregates adsorbed to DOPG/D2O and air/D2O interfaces. We find that aggregates with a parallel and antiparallel β-sheet structure together with smaller unordered aggregates and a denaturated protein are adsorbed to both interfaces. We demonstrate that to retrieve this information, fitting of the VSFG spectra is essential. The number of bands contributing to the VSFG spectrum might be misinterpreted, due to interference between peaks with opposite orientation and a nonresonant background. Our study identified hydrophobicity as the main driving force for adsorption to the air/D2O interface. Adsorption to the DOPG/D2O interface is also influenced by hydrophobic interaction; however, electrostatic interaction between the charged protein's groups and the lipid's headgroups has the most significant effect on the adsorption. We find that the intensity of the VSFG spectrum at the DOPG/D2O interface is strongly enhanced by varying the pH of the solution. We show that this change is not due to a change of lysozyme's and its aggregates' charge but due to dipole reorientation at the DOPG/D2O interface. This finding suggests that extra care must be taken when interpreting the VSFG spectrum of proteins adsorbed at the lipid/water interface.
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Affiliation(s)
- S Strazdaite
- Department of Organic Chemistry, Center for Physical Sciences and Technology, Sauletekio Ave. 3, Vilnius LT-10257, Lithuania
| | - E Navakauskas
- Department of Organic Chemistry, Center for Physical Sciences and Technology, Sauletekio Ave. 3, Vilnius LT-10257, Lithuania
| | - J Kirschner
- Institute of Solid State Physics, Vienna Technical University, Wiedner Hauptstrasse 8-10, 1040 Vienna, Austria
| | - T Sneideris
- Institute of Biotechnology, Life Sciences Center, Vilnius University, Sauletekio 7, LT-10257 Vilnius, Lithuania
| | - G Niaura
- Department of Organic Chemistry, Center for Physical Sciences and Technology, Sauletekio Ave. 3, Vilnius LT-10257, Lithuania
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Storm Van's Gravesande K, Calabrese P, Blaschek A, Rostásy K, Huppke P, Rothe L, Mall V, Kessler J, Kalbe E, Dornfeld E, Elpers C, Lohmann H, Weddige A, Hagspiel S, Kirschner J, Brehm M, Blank C, Schubert J, Schimmel M, Pacheè S, Mohrbach M, Karenfort M, Kamp G, Lücke T, Neumann H, Lutz S, Gierse A, Sievers S, Schiffmann H, de Soye I, Trollmann R, Candova A, Rosner M, Neu A, Romer G, Seidel U, John R, Hofmann C, Schulz, Kinder S, Bertolatus A, Scheidtmann K, Lasogga R, Leiz S, Alber M, Kranz J, Bajer-Kornek B, Seidl R, Novak A. The Multiple Sclerosis Inventory of Cognition for Adolescents (MUSICADO): A brief screening instrument to assess cognitive dysfunction, fatigue and loss of health-related quality of life in pediatric-onset multiple sclerosis. Eur J Paediatr Neurol 2019; 23:792-800. [PMID: 31551133 DOI: 10.1016/j.ejpn.2019.08.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/09/2019] [Revised: 07/23/2019] [Accepted: 08/22/2019] [Indexed: 10/26/2022]
Abstract
OBJECTIVE Screening for cognitive impairment (CI), fatigue and also Health-related quality of life (HRQoL) in patients with pediatric-onset multiple sclerosis (POMS) is of utmost importance in clinical practice. The aim of this study was to establish a new and validated pediatric screening tool "MUSICADO" that is easy to use and time economical. METHODS 106 patients with POMS aged 12-18 years and 210 healthy controls (HCs) stratified for age and education underwent neuropsychological testing including a screening test "Multiple Sclerosis Inventory of Cognition" for adults and 8 standardized cognitive tests and established scales to assess fatigue and HRQoL. RESULTS The phonemic verbal fluency task (RWT "s-words"), the Trail Making Test A (TMT-A), and the Digit Span Forward discriminated significantly between patients and HCs (p = 0.000, respectively) and showed the highest proportion of test failure in patients (24.5%, 17.9%; 15.1%, respectively). Therefore, they were put together to form the cognitive part of the "MUSICADO". After applying a scoring algorithm with balanced weighting of the subtests and age and education correction and a cut-off score for impairment, 35.8% of patients were categorized to be cognitively impaired (specificity: 88.6%). Fatigue was detected in 37.1% of the patients (specificity: 94.0%) and loss of HRQoL in 41.8% (specificity 95.7%) with the screening version, respectively. CONCLUSION The MUSICADO is a newly designed brief and easy to use screening test to help to early identify CI, fatigue, and loss of HRQoL in patients with POMS as cut scores are provided for all three items. Further studies will have to show its usability in independent samples of patients with POMS.
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Affiliation(s)
- K Storm Van's Gravesande
- Department of Pediatrics, Child and Adolescent Psychosomatics, Technische Universität München, Munich, Heigelhofstr. 63, 81377 München, Germany.
| | - P Calabrese
- Neuropsychology and Behavioral Neurology Unit, Division of Molecular and Cognitive Neuroscience, Department of Psychology, University of Basel, Birmannsgasse 8, 4055 Basel, Switzerland
| | - A Blaschek
- Department of Pediatric Neurology and Developmental Medicine, Dr. von Hauner Children's Hospital, Ludwig-Maximilians-University, Lindwurmstrasse 4, 80337 Munich, Germany
| | - K Rostásy
- Pediatric Neurology, Witten/Herdecke University, Children's Hospital Datteln, Dr. Friedrich Steiner Str. 5, 5711 Datteln, Germany
| | - P Huppke
- Department of Pediatrics and Adolescent Medicine, Division of Pediatric Neurology, University Medical Center Göttingen, Robert-Koch Strasse 40, 37075 Göttingen, Germany
| | - L Rothe
- Department of Neurology, University Hospital Cologne, Kerpenerstr. 62, 50937 Cologne, Germany
| | - V Mall
- Department of Pediatrics, Child and Adolescent Psychosomatics, Technische Universität München, Munich, Heigelhofstr. 63, 81377 München, Germany
| | - J Kessler
- Department of Neurology, University Hospital Cologne, Kerpenerstr. 62, 50937 Cologne, Germany
| | - E Kalbe
- Department of Medical Psychology ǀ, Neuropsychology and Gender Studies & Center for Neuropsychological Diagnostics and Intervention (CeNDI), University Hospital Cologne, Kerpenerstr. 62, 50937 Cologne, Germany
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Tulinius M, Buccella F, Desguerre I, Kirschner J, Mercuri E, Muntoni F, Nascimento Osorio A, Delage A, Zhu J, Kristensen A, Trifillis P, Santos C, McDonald C. P.390Pulmonary function in patients with Duchenne muscular dystrophy from the STRIDE registry and the CINRG natural history study: a matched cohort analysis. Neuromuscul Disord 2019. [DOI: 10.1016/j.nmd.2019.06.552] [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: 10/25/2022]
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Servais L, Day J, De Vivo D, Kirschner J, Mercuri E, Muntoni F, Shieh P, Tizzano E, Droege M, Dabbous O, Khan F, Anderson F, Finkel R. PND18 THE RESTORE REGISTRY: A RESOURCE FOR MEASURING AND IMPROVING SPINAL MUSCULAR ATROPHY OUTCOMES. Value Health Reg Issues 2019. [DOI: 10.1016/j.vhri.2019.08.348] [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: 10/25/2022]
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Kirschner J, Darras B, Farrar M, Mercuri E, Chiriboga C, Kuntz N, Shieh P, Tulinius M, Montes J, Reyna S, Gambino G, Foster R, Bhan I, Wong J, Farwell W. Interim report on the safety and efficacy of longer-term treatment with nusinersen in later-onset spinal muscular atrophy (SMA): Results from the shine study. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.1272] [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: 10/25/2022]
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Pechmann A, Bernert G, Schara U, Schwersenz I, Walter M, Lochmüller H, Kirschner J. P.392SMArtCARE - Real-world-data collection of patients with spinal muscular atrophy. Neuromuscul Disord 2019. [DOI: 10.1016/j.nmd.2019.06.554] [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: 11/15/2022]
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Kirschner J, Darras B, Farrar M, Mercuri E, Chiriboga C, Kuntz N, Shieh P, Tulinius M, Montes J, Reyna S, Gambino G, Foster R, Bhan I, Wong J, Farwell W. P.352Interim report on the safety and efficacy of longer-term treatment with nusinersen in later-onset spinal muscular atrophy (SMA): results from the SHINE study. Neuromuscul Disord 2019. [DOI: 10.1016/j.nmd.2019.06.514] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Walter M, Stauber J, Hiebeler M, Thiele S, Greckl E, Pechmann A, Kirschner J, Schoser B. P.354Treatment effects of nusinersen in longstanding adult 5q-SMA type 3 - a prospective observational study over 10 months. Neuromuscul Disord 2019. [DOI: 10.1016/j.nmd.2019.06.516] [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: 10/25/2022]
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25
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Ryan M, De Vivo D, Bertini E, Hwu W, Crawford T, Swoboda K, Finkel R, Kirschner J, Kuntz N, Parsons J, Butterfield R, Topaloğlu H, Ben Omran T, Sansone V, Jong Y, Shu F, Foster R, Bhan I, Fradette S, Farwell W. P.356Nusinersen in infants who initiate treatment in a presymptomatic stage of spinal muscular atrophy: interim results from the phase 2 NURTURE study. Neuromuscul Disord 2019. [DOI: 10.1016/j.nmd.2019.06.518] [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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26
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Schorling D, Müller C, Pechmann A, Borell S, Langer T, Thiele S, Walter M, Zieger B, Kirschner J. EP.69Disorders of coagulation in Duchenne muscular dystrophy? Results of a registry-based online survey. Neuromuscul Disord 2019. [DOI: 10.1016/j.nmd.2019.06.475] [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: 10/25/2022]
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Ryan M, De Vivo D, Bertini E, Hwu W, Crawford T, Swoboda K, Finkel R, Kirschner J, Kuntz N, Parsons J, Butterfield R, Topaloglu H, Omran TB, Sansone V, Jong Y, Shu F, Foster R, Bhan I, Fradette S, Farwell W. Nusinersen in infants who initiate treatment in a presymptomatic stage of spinal muscular atrophy (SMA): Interim results from the phase 2 nurture study. J Neurol Sci 2019. [DOI: 10.1016/j.jns.2019.10.1276] [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: 10/25/2022]
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Servais L, Day J, De Vivo D, Kirschner J, Mercuri E, Muntoni F, Shieh P, Tizzano E, Droege M, Dabbous O, Khan F, Anderson F, Finkel R. REGISTRIES. Neuromuscul Disord 2019. [DOI: 10.1016/j.nmd.2019.06.550] [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: 11/29/2022]
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Abstract
We use surface-specific heterodyne-detected vibrational sum-frequency generation spectroscopy (HD-VSFG) and surface tension measurements to investigate the molecular structure of the surface of aqueous solutions of poly(vinyl alcohol) (PVA) polymers with average molecular weights of 10000 and 125000 g/mol. We find that the interfacial water molecules have a preferred orientation with their hydrogen-bonded O-H groups pointing away from the bulk, for both PVA10000 and PVA125000. This observation is explained from the ongoing hydrolysis of the acetyl impurities on the PVA polymer chains. This hydrolysis yields negatively charged acetate ions that have a relatively high surface propensity. For both PVA10000 and PVA125000 the strong positive signal vanishes when the pH is decreased, due to the neutralization of the acetate ions. For solutions with a high concentration of PVA10000 the interfacial water signal becomes very small, indicating that the surface gets completely covered with a disordered PVA polymer film. In contrast, for high concentrations of PVA125000, the strong positive water signal persists at high pH, which shows that the water surface does not get completely covered. The HD-VSFG data combined with surface tension data indicate that concentrated PVA125000 solutions form a structured surface layer with pores containing a high density of interfacial water.
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Affiliation(s)
- C J Moll
- AMOLF , Science Park 104 , 1098XG Amsterdam , The Netherlands
| | - K Meister
- AMOLF , Science Park 104 , 1098XG Amsterdam , The Netherlands.,Max-Planck Institute for Polymer Research , Ackermanweg 10 , D-55128 Mainz , Germany
| | | | - H J Bakker
- AMOLF , Science Park 104 , 1098XG Amsterdam , The Netherlands
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Kletzl H, Czech C, Cleary Y, Sturm S, Günther A, Baranello G, Mercuri E, Servais L, Day J, Deconinck N, Klein A, Darras B, Masson R, Kirschner J, Goemans N, Pera M, Chiriboga C, Fischer D, Gorni K, Khwaja O. SMA THERAPIES II AND BIOMARKERS. Neuromuscul Disord 2018. [DOI: 10.1016/j.nmd.2018.06.307] [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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Muntoni F, Desguerre I, Guglieri M, Mercuri E, Nascimento Osorio A, Kirschner J, Tulinius M, Buccello F, Delage A, Elfring G, Werner C, Schilling T, Trifillis P. DMD CLINICAL THERAPIES I. Neuromuscul Disord 2018. [DOI: 10.1016/j.nmd.2018.06.140] [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]
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Mercuri E, Baranello G, Kirschner J, Servais L, Goemans N, Carmela Pera M, Buchbjerg J, Armstrong G, Kletzl H, Gerber M, Czech C, Cleary Y, Gorni K, Khwaja O. SMA THERAPIES II AND BIOMARKERS. Neuromuscul Disord 2018. [DOI: 10.1016/j.nmd.2018.06.303] [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: 10/28/2022]
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Langer T, Pechmann A, Wider S, Kirschner J. Letter to the editor: In reply to Sansone et al. Eur J Paediatr Neurol 2018; 22:732. [PMID: 29628153 DOI: 10.1016/j.ejpn.2018.03.004] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Accepted: 03/20/2018] [Indexed: 10/17/2022]
Affiliation(s)
| | | | | | - J Kirschner
- Medical Center - University of Freiburg, Department of Neuropediatrics and Muscle Disorders, Faculty of Medicine, Mathildenstrasse 1, 79100, Freiburg, Germany.
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Kreuter M, Swigris J, Pittrow D, Geier S, Klotsche J, Prasse A, Wirtz H, Koschel D, Andreas S, Grohe C, Wilkens H, Hagmeyer L, Skowasch D, Meyer FJ, Kirschner J, Gläser S, Herth FJF, Welte T, Neurohr C, Schweiblmair M, Held M, Bahmer T, Frankenberger M, Behr J. Quality of life trajectory in patients with idiopathic pulmonary fibrosis (IPF): longitudinal QoL assessment of the INSIGHTS-IPF registry. Pneumologie 2018. [DOI: 10.1055/s-0037-1619192] [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: 10/28/2022]
Affiliation(s)
- M Kreuter
- Zentrum für Interstitielle und Seltene Lungenerkrankungen, Pneumologie und Beatmungsmedizin, Thoraxklinik; Universitätsklinikum Heidelberg und Translationales Zentrum für Lungenforschung Heidelberg (TLRC); Mitglied des Deutschen Zentrums für Lungenforschung (DZL)
| | - J Swigris
- Interstitial Lung Disease Program, National Jewish Health, Denver, Colorado, USA
| | - D Pittrow
- Institut für Klinische Pharmakologie, Medizinische Fakultät, Technische Universität Dresden
| | - S Geier
- Department Market Access, Boehringer Ingelheim
| | - J Klotsche
- Epidemiologie, Deutsches Rheuma-Forschungsinstitut, Berlin
| | - A Prasse
- Klinik für Pneumologie, Medizinische Hochschule, Hannover
| | - H Wirtz
- Pneumologie, Universitätsklinikum der Universität Leipzig
| | - D Koschel
- Zentrum für Pneumologie-, Thorax- und Gefäßchirurgie, Fachkrankenhaus Coswig
| | - S Andreas
- Kardiologie und Pneumologie, Lungenfachklinik Immenhausen und Universitätsmedizin Göttingen
| | - C Grohe
- Klinik für Pneumologie, ELK, Berlin Buch
| | - H Wilkens
- Pneumologie, Klinik für Innere Medizin V, Universitätsklinikum des Saarlandes, Homburg
| | | | - D Skowasch
- Medical Clinic II, University Hospital Bonn
| | - FJ Meyer
- Lungenzentrum München, LZM Bogenhausen-Harlaching, Städtisches Klinikum München GmbH
| | - J Kirschner
- Center for Internal Medical Studies Cims, Bamberg
| | - S Gläser
- Klinik und Poliklinik für Innere Medizin B, Forschungsbereich Pneumologie und Pneumologische Epidemiologie, Universitätsmedizin Greifswald; Klinik für Innere Medizin – Pneumologie, Greifswald and Vivantes Klinikum Spandau/Berlin
| | - FJF Herth
- Zentrum für Interstitielle und Seltene Lungenerkrankungen, Thoraxklinik, Uniklinikum Heidelberg
| | - T Welte
- Klinik für Pneumologie, Medizinische Hochschule Hannover
| | - C Neurohr
- Comprehensive Pneumology Center, Lungenforschungsambulanz, Klinikum der Universität München
| | | | - M Held
- Abteilung Innere Medizin, Pneumologie, Standort Missioklinik, Klinikum Würzburg Mitte
| | | | - M Frankenberger
- Comprehensive Pneumology Center, Lungenforschungsambulanz, Klinikum der Universität München
| | - J Behr
- Comprehensive Pneumology Center, Lungenforschungsambulanz, Klinikum der Universität München and Asklepios Fachkliniken München-Gauting; Member of the German Center for Lung Research (DZL)
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Prill R, Kirschner J, Michel S, Schulz R, Hommel H. Study Protocol of a Multi-Stage Randomised Controlled Study for the Assessment of Postoperative Therapeutic Procedures after Total Knee Arthroplasty. International Journal of Physiotherapy 2018. [DOI: 10.15621/ijphy/2018/v5i1/167194] [Citation(s) in RCA: 1] [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: 11/05/2022] Open
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Dittrich S, Graf E, Neudorf U, Heilmann A, Schara U, Kirschner J, Stiller B. Effect and Safety of Treatment with ACE-Inhibitor Enalapril and β-Blocker Metoprolol on the Onset of Left Ventricular Dysfunction in Duchenne Muscular Dystrophy: Results from a Six Years, Double-blind, Randomized Placebo-controlled Trial. Thorac Cardiovasc Surg 2018. [DOI: 10.1055/s-0038-1628322] [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: 10/28/2022]
Affiliation(s)
- S. Dittrich
- Pediatric Cardiology, Erlangen University Hospital, Erlangen, Germany
| | - E. Graf
- Clinical Trials Unit of the Medical Center, University of Freiburg, Freiburg, Germany
| | - U. Neudorf
- Clinic for Pediatrics III, University Hospital Essen, Essen, Germany
| | - A. Heilmann
- Department of Pediatrics, University Hospital Carl Gustav Carus, Dresden, Germany
| | - U. Schara
- Pediatric Neurology, University Hospital Essen, Essen, Germany
| | - J. Kirschner
- Department of Neuropaediatrics and Muscle Disorders, University Medical Center, Freiburg, Germany
| | - B. Stiller
- Congenital Heart Defects and Pediatric Cardiology, Heart Center Freiburg University, Freiburg, Germany
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Chen YJ, Zakeri K, Ernst A, Qin HJ, Meng Y, Kirschner J. Group Velocity Engineering of Confined Ultrafast Magnons. Phys Rev Lett 2017; 119:267201. [PMID: 29328716 DOI: 10.1103/physrevlett.119.267201] [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] [Received: 04/20/2017] [Indexed: 06/07/2023]
Abstract
Quantum confinement permits the existence of multiple terahertz magnon modes in atomically engineered ultrathin magnetic films and multilayers. By means of spin-polarized high-resolution electron energy-loss spectroscopy, we report on the direct experimental detection of all exchange-dominated terahertz confined magnon modes in a 3 ML Co film. We demonstrate that, by tuning the structural and magnetic properties of the Co film, through its epitaxial growth on different surfaces, e.g., Ir(001), Cu(001), and Pt(111), one can achieve entirely different in-plane magnon dispersions, characterized by positive and negative group velocities. Our first-principles calculations show that spin-dependent many-body correlation effects in Co films play an important role in the determination of the energies of confined magnon modes. Our results suggest a pathway towards the engineering of the group velocity of confined ultrafast magnons.
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Affiliation(s)
- Y-J Chen
- Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle, Germany
| | - Kh Zakeri
- Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle, Germany
- Heisenberg Spin-dynamics Group, Physikalisches Institut, Karlsruhe Institute of Technology, Wolfgang-Gaede-Strasse 1, D-76131 Karlsruhe, Germany
| | - A Ernst
- Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle, Germany
- Institute for Theroretical Physics, Johannes Kepler University, Altenberger Straße 69, 4040 Linz, Austria
| | - H J Qin
- Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle, Germany
| | - Y Meng
- Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle, Germany
| | - J Kirschner
- Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle, Germany
- Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Von-Seckendorff-Platz 1, 06120 Halle, Germany
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Reghan Foley A, Donkervoort S, Bolduc V, Hu Y, Cummings B, Lek M, Sarkozy A, Jimenez-Mallebrera C, Butterfield R, Lamande S, Kirschner J, Allamand V, Stojkovic T, Quijano-Roy S, Gualandi F, Ferlini A, Bertini E, MacArthur D, Muntoni F, Bönnemann C. A common COL6A1 deep-intronic pseudo-exon inserting mutation causes a distinct phenotype of Ullrich congenital muscular dystrophy. Neuromuscul Disord 2017. [DOI: 10.1016/j.nmd.2017.06.055] [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: 11/30/2022]
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Servais L, Farrar M, Finkel R, Kirschner J, Muntoni F, Sun P, Gheuens S, Schneider E, Farwell W. Nusinersen demonstrates greater efficacy in infants with shorter disease duration: End of study results from the ENDEAR study in infants with spinal muscular atrophy (SMA). Neuromuscul Disord 2017. [DOI: 10.1016/j.nmd.2017.06.421] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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40
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Mercuri E, Kirschner J, Baranello G, Servais L, Goemans N, Pera M, Marquet A, Seabrook T, Sturm S, Armstrong G, Kletzl H, Czech C, Kraus D, Abdallah H, Mueller L, Gorni K, Khwaja O. Clinical studies of RG7916 in patients with spinal muscular atrophy: SUNFISH part 1 study update. Neuromuscul Disord 2017. [DOI: 10.1016/j.nmd.2017.06.415] [Citation(s) in RCA: 9] [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: 11/16/2022]
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41
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Li CH, Tusche C, Schumann FO, Kirschner J. Correlated Electron Dynamics at Surfaces Investigated via He^{2+} Ion Neutralization. Phys Rev Lett 2017; 118:136402. [PMID: 28409992 DOI: 10.1103/physrevlett.118.136402] [Citation(s) in RCA: 2] [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: 10/27/2016] [Indexed: 06/07/2023]
Abstract
The neutralization of a single He^{2+} ion near a Ir surface leads to the emission of an electron pair. Via coincidence spectroscopy we give evidence that a sizable amount of these electron pairs originate from a correlated single step neutralization of the ion involving a total of four electrons from the metal. These correlated electron pairs cannot be explained in the common picture of two consecutive and independent neutralization steps. We infer a characteristic time scale for the correlated electron dynamics in the metal of 40-400 as.
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Affiliation(s)
- C H Li
- Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle, Germany
| | - C Tusche
- Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle, Germany
| | - F O Schumann
- Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle, Germany
| | - J Kirschner
- Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, 06120 Halle, Germany
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42
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Qin HJ, Zakeri K, Ernst A, Kirschner J. Temperature Dependence of Magnetic Excitations: Terahertz Magnons above the Curie Temperature. Phys Rev Lett 2017; 118:127203. [PMID: 28388202 DOI: 10.1103/physrevlett.118.127203] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Indexed: 06/07/2023]
Abstract
When an ordered spin system of a given dimensionality undergoes a second order phase transition, the dependence of the order parameter, i.e., magnetization on temperature, can be well described by thermal excitations of elementary collective spin excitations (magnons). However, the behavior of magnons themselves, as a function of temperature and across the transition temperature T_{C}, is an unknown issue. Utilizing spin-polarized high resolution electron energy loss spectroscopy, we monitor the high-energy (terahertz) magnons, excited in an ultrathin ferromagnet, as a function of temperature. We show that the magnons' energy and lifetime decrease with temperature. The temperature-induced renormalization of the magnons' energy and lifetime depends on the wave vector. We provide quantitative results on the temperature-induced damping and discuss the possible mechanism, e.g., multimagnon scattering. A careful investigation of physical quantities determining the magnons' propagation indicates that terahertz magnons sustain their propagating character even at temperatures far above T_{C}.
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Affiliation(s)
- H J Qin
- Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, D-06120 Halle, Germany
| | - Kh Zakeri
- Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, D-06120 Halle, Germany
- Heisenberg Spin-dynamics Group, Physikalisches Institut, Karlsruhe Institute of Technology, Wolfgang-Gaede-Strasse 1, D-76131 Karlsruhe, Germany
| | - A Ernst
- Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, D-06120 Halle, Germany
| | - J Kirschner
- Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, D-06120 Halle, Germany
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Behr J, Pittrow D, Kreuter M, Prasse A, Klotsche J, Koschel D, Andreas S, Neurohr C, Claussen M, Schwaiblmair M, Grohé C, Wilkens H, Skowasch D, Kirschner J, Meyer FJ, Ewert R, Held M, Huber RM, Bahmer T, Gläser S, Welte T, Randerath WJ, Wirtz H. Klinischer Verlauf von Patienten mit Idiopathischer Lungenfibrose: aktuelle Daten aus dem INSIGHTS-IPF Register. Pneumologie 2017. [DOI: 10.1055/s-0037-1598290] [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]
Affiliation(s)
- J Behr
- Zentrum für Pneumologie und Thoraxchirurgie, Asklepios Fachkliniken München-Gauting; Med. Klinik V, LMU München; Mitglied des Dzl
| | - D Pittrow
- Institut für Klinische Pharmakologie, Med. Fakultät, Technische Universität Dresden
| | - M Kreuter
- Pneumologie und Beatmungsmedizin, Thoraxklinik, Universitätsklinikum Heidelberg und Translationales Zentrum für Lungenforschung Heidelberg (Tlrc); Mitglied des Deutschen Zentrums für Lungenforschung (Dzl)
| | - A Prasse
- Klinik für Pneumologie, Medizinische Hochschule Hannover
| | - J Klotsche
- Epidemiologie, Deutsches Rheuma-Forschungszentrum
| | - D Koschel
- Zentrum für Pneumologie, Thorax- und Gefäßchirurgie, Fachkrankenhaus Coswig GmbH
| | - S Andreas
- Lungenfachklinik Immenhausen, Krs. Kassel; Pneumologische Lehrklinik Univ. Göttingen
| | - C Neurohr
- Medizinische Klinik und Poliklinik V, Klinikum der Universität München, Großhadern
| | - M Claussen
- Zentrum für Pneumologie und Thoraxchirurgie, Lungenclinic Großhansdorf
| | - M Schwaiblmair
- I. Medizinsche Klinik, Funktionsbereich Pneumologie, Klinikum Augsburg
| | - C Grohé
- Klinik für Pneumologie, Evangelische Lungenklinik Berlin
| | - H Wilkens
- Medizinische Klinik V, Universitätsklinikum des Saarlandes
| | - D Skowasch
- Medizinische Klinik II, Kardiologie, Pneumologie, Uniklinikum Bonn
| | | | - FJ Meyer
- Klinik für Pneumologie, Gastroenterologie, Internistische Intensiv- und Beatmungsmedizin, Klinikum München-Harlaching; Städt. Klinikum München GmbH
| | - R Ewert
- Zentrum für Innere Medizin, Klinik für Innere B, Bereich Pneumologie, Universitätsmedizin Greifswald, Körperschaft des Öffentlichen Rechts
| | - M Held
- Abteilung Innere Medizin Pneumologie, Missionsärztliche Klinik, Klinikum Würzburg Mitte
| | - RM Huber
- Sektion Pneumologie Innenstadt und Thorakale Onkologie, Universität München; Thoracic Oncology Centre Munich
| | | | - S Gläser
- Klinik und Poliklinik für Innere Medizin B, Bereich Pneumologie, Universitätsmedizin Greifswald; Klinik für Innere Medizin, Pneumologie, Vivantes Klinikum Spandau
| | - T Welte
- Klinik für Pneumologie, Medizinische Hochschule Hannover
| | - WJ Randerath
- Klinik für Pneumologie und Allergologie, Zentrum für Schlaf- und Beatmungsmedizin, Krankenhaus Bethanien GmbH
| | - H Wirtz
- Abteilung für Pneumologie, Universitätsklinikum Leipzig AöR
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Kreuter M, Wirtz H, Prasse A, Klotsche J, Geier S, Kramps T, Wilkens H, Grohé C, Skowasch D, Huber RM, Neurohr C, Kirschner J, Koschel D, Meyer FJ, Andreas S, Gläser S, Claussen M, Held M, Ewert R, Randerath WJ, Bahmer T, Welte T, Koch A, Herth FJF, Pittrow D, Schwaiblmair M, Behr J. Lebensqualität von Patienten mit idiopathischer Lungenfibrose: Daten aus dem deutschen INSIGHTS-IPF Register. Pneumologie 2017. [DOI: 10.1055/s-0037-1598409] [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]
Affiliation(s)
- M Kreuter
- Pneumologie und Beatmungsmedizin, Thoraxklinik am Universitätsklinikum Heidelberg und Translationales Zentrum für Lungenforschung Heidelberg (Tlrc); Mitglied des Deutschen Zentrums für Lungenforschung (Dzl)
| | - H Wirtz
- Abteilung für Pneumologie, Universitätsklinikum Leipzig AöR
| | - A Prasse
- Klinik für Pneumologie, Medizinische Hochschule
| | - J Klotsche
- Epidemiologie, Deutsches Rheuma-Forschungszentrum
| | - S Geier
- Boehringer Ingelheim Pharma GmbH & Co. KG
| | - T Kramps
- Boehringer Ingelheim Pharma GmbH & Co. KG
| | - H Wilkens
- Medizinische Klinik V, Universitätsklinikum des Saarlandes
| | - C Grohé
- Klinik für Pneumologie, Evangelische Lungenklinik Berlin
| | - D Skowasch
- Medizinische Klinik II, Kardiologie, Pneumologie, Uniklinikum Bonn
| | - RM Huber
- Sektion Pneumologie Innenstadt und Thorakale Onkologie, Universität München
| | - C Neurohr
- Medizinische Klinik und Poliklinik V, Klinikum der Universität München, Großhadern; Schwerpunkt Pneumologie, Klinikum Großhadern der LMU
| | | | - D Koschel
- Zentrum für Pneumologie, Thorax- und Gefäßchirurgie, Fachkrankenhaus Coswig GmbH
| | - FJ Meyer
- Klinik für Pneumologie, Gatsroenterologie, Internistische Intensiv- und Beatmungsmedizin, Klinikum München-Harlaching, Städt. Klinikum München GmbH
| | - S Andreas
- Lungenfachklinik Immenhausen, Krs. Kassel; Pneumologische Lehrklinik Univ. Göttingen
| | - S Gläser
- Pneumologie, Klinik und Poliklinik für Innere Medizin B, Universitätsmedizin Greifswaldstation Mosler
| | - M Claussen
- Zentrum für Pneumologie und Thoraxchirurgie, Lungenclinic Großhansdorf
| | - M Held
- Abteilung Innere Medizin Pneumologie, Klinikum Würzburg Mitte gGmbH
| | - R Ewert
- Zentrum für Innere Medizin, Klinik für Innere B, Bereich Pneumologie, Universitätsmedizin Greifswald Körperschaft des Öffentlichen Rechts
| | - WJ Randerath
- Klinik für Pneumologie und Allergologie, Zentrum für Schlaf- und Beatmungsmedizin, Krankenhaus Bethanien GmbH
| | | | - T Welte
- Klinik für Pneumologie, Medizinische Hochschule Hannover
| | - A Koch
- Medizinische Klinik und Poliklinik V, AG Obstruktive Lungenerkrankungen, Klinikum der LMU München
| | - FJF Herth
- Pneumologie und Beatmungsmedizin, Thoraxklinik am Universitätsklinikum Heidelberg und Translationales Zentrum für Lungenforschung Heidelberg (Tlrc); Mitglied des Deutschen Zentrums für Lungenforschung (Dzl)
| | - D Pittrow
- Medizinische Fakultät, Institut für Klinische Pharmakologie, Technische Universität
| | - M Schwaiblmair
- I. Medizinsche Klinik, Funktionsbereich Pneumologie, Klinikum Augsburg
| | - J Behr
- Zentrum für Pneumologie und Thoraxchirurgie, Med. Klinik V, Asklepios Fachkliniken München-Gauting, LMU; Mitglied des Dzl
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Wedemeyer H, Port K, Deterding K, Wranke A, Kirschner J, Bruno B, Martins B, Glenn J, Kornberg M, Manns M. A phase 2 dose-escalation study of lonafarnib plus ritonavir in patients with chronic hepatitis D: final results from the Lonafarnib with ritonavir in HDV-4 (LOWR HDV-4) study. J Hepatol 2017. [DOI: 10.1016/s0168-8278(17)30310-0] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
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Ofner J, Kirschner J, Eitenberger E, Friedbacher G, Kasper-Giebl A, Lohninger H, Eisenmenger-Sittner C, Lendl B. A novel substrate for multisensor hyperspectral imaging. J Microsc 2016; 265:341-348. [PMID: 27892598 DOI: 10.1111/jmi.12506] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Revised: 10/28/2016] [Accepted: 10/30/2016] [Indexed: 12/28/2022]
Abstract
The quality of chemical imaging, especially multisensor hyperspectral imaging, strongly depends on sample preparation techniques and instrumental infrastructure but also on the choice of an appropriate imaging substrate. To optimize the combined imaging of Raman microspectroscopy, scanning-electron microscopy and energy-dispersive X-ray spectroscopy, a novel substrate was developed based on sputtering of highly purified aluminium onto classical microscope slides. The novel aluminium substrate overcomes several disadvantages of classical substrates like impurities of the substrate material and contamination of the surface as well as surface roughness and homogeneity. Therefore, it provides excellent conditions for various hyperspectral imaging techniques and enables high-quality multisensor hyperspectral chemical imaging at submicron lateral resolutions.
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Affiliation(s)
- J Ofner
- TU Wien, Institute of Chemical Technologies and Analytics, Vienna, Austria
| | - J Kirschner
- TU Wien, Institute of Solide State Physics, Vienna, Austria
| | - E Eitenberger
- TU Wien, Institute of Chemical Technologies and Analytics, Vienna, Austria
| | - G Friedbacher
- TU Wien, Institute of Chemical Technologies and Analytics, Vienna, Austria
| | - A Kasper-Giebl
- TU Wien, Institute of Chemical Technologies and Analytics, Vienna, Austria
| | - H Lohninger
- TU Wien, Institute of Chemical Technologies and Analytics, Vienna, Austria
| | | | - B Lendl
- TU Wien, Institute of Chemical Technologies and Analytics, Vienna, Austria
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Manna S, Przybylski M, Sander D, Kirschner J. The role of electron confinement in Pd films for the oscillatory magnetic anisotropy in an adjacent Co layer. J Phys Condens Matter 2016; 28:456001. [PMID: 27609044 DOI: 10.1088/0953-8984/28/45/456001] [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: 06/06/2023]
Abstract
We demonstrate the interplay between quantum well states in Pd and the magnetic anisotropy in Pd/Co/Cu (0 0 1) by combined scanning tunneling spectroscopy (STS) and magneto optical Kerr effect (MOKE) measurements. Low temperature scanning tunneling spectroscopy reveals occupied and unoccupied quantum well states (QWS) in atomically flat Pd films on Co/Cu (0 0 1). These states give rise to sharp peaks in the differential conductance spectra. A quantitative analysis of the spectra reveals the electronic dispersion of the Pd (0 0 1) d-band ([Formula: see text]-type) along the [Formula: see text]-X direction. In situ MOKE experiments on Pd/Co/Cu (1, 1, 13) uncover a periodic variation of the in-plane uniaxial magnetic anisotropy as a function of Pd thickness with a period of 6 atomic layers Pd. STS shows that QWS in Pd cross the Fermi level with the same periodicity of 6 atomic layers. Backed by previous theoretical work we ascribe the variation of the magnetic anisotropy in Co to QWS in the Pd overlayer. Our results suggest a novel venue towards tailoring uniaxial magnetic anisotropy of ferromagnetic films by exploiting QWS in an adjacent material with large spin-orbit coupling.
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Affiliation(s)
- Sujit Manna
- Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, D-06120 Halle, Germany
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Affiliation(s)
- D. Vasilyev
- Max-Planck Institut für Mikrostrukturphysik; Weinberg 2 06120 Halle Germany
| | - J. Kirschner
- Max-Planck Institut für Mikrostrukturphysik; Weinberg 2 06120 Halle Germany
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Lühl S, Bode H, Schlötzer W, Bartsakoulia M, Horvath R, Abicht A, Stenzel M, Kirschner J, Grünert SC. Novel homozygous RARS2 mutation in two siblings without pontocerebellar hypoplasia - further expansion of the phenotypic spectrum. Orphanet J Rare Dis 2016; 11:140. [PMID: 27769281 PMCID: PMC5073905 DOI: 10.1186/s13023-016-0525-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Accepted: 10/11/2016] [Indexed: 01/01/2023] Open
Abstract
BACKGROUND Pontocerebellar hypoplasia type 6 (PCH6) is a mitochondrial disease caused by mutations in the RARS2 gene. RARS2 encodes mitochondrial arginyl transfer RNA synthetase, an enzyme involved in mitochondrial protein translation. A total of 27 patients from 14 families have been reported so far. Characteristic clinical features comprise neonatal lactic acidosis, severe encephalopathy, intractable seizures, feeding problems and profound developmental delay. Most patients show typical neuroradiologic abnormalities including cerebellar hypoplasia and progressive pontocerebellar atrophy. METHODS We describe the clinical, biochemical and molecular features of 2 siblings with a novel homozygous mutation in RARS2. Both patients presented neonatally with lactic acidosis. While the older sibling had severe neurological symptoms with microcephaly, seizures and developmental delay, the younger patient was still neurologically asymptomatic at the age of 2 months. RESULTS MRI studies in both children lacked pontocerebellar involvement. The expression of the OXPHOS complex proteins was decreased in both patients, whereas oxygen consumption was increased. CONCLUSIONS Characteristic neuroradiological abnormalities of PCH6 such as vermis and cerebellar hypoplasia and progressive pontocerebellar atrophy may be missing in patients with RARS2 mutations. RARS2 testing should therefore also be performed in patients without pontocerebellar hypoplasia but otherwise typical clinical symptoms.
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Affiliation(s)
- S Lühl
- Department of Pediatrics and Adolescent Medicine, University Medical Center, Ulm, Germany
| | - H Bode
- Department of Pediatrics and Adolescent Medicine, University Medical Center, Ulm, Germany
| | - W Schlötzer
- Department of Diagnostic and Interventional Radiology, Section Neuroradiology, University Medical Center, Ulm, Germany
| | - M Bartsakoulia
- John Walton Muscular Dystrophy Research Centre, Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne, UK
| | - R Horvath
- John Walton Muscular Dystrophy Research Centre, Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne, UK
| | - A Abicht
- Medical Genetics Centre, Munich, Germany
| | - M Stenzel
- Department of Pediatric Radiology, Kliniken der Stadt Köln, Köln, Germany
| | - J Kirschner
- Department of Neuropediatrics and Muscle Disorders, Medical Center - University of Freiburg, Faculty of Medicine, Freiburg, Germany
| | - S C Grünert
- Department of General Pediatrics, Adolescent Medicine and Neonatology, Medical Center - University of Freiburg, Faculty of Medicine, Freiburg, Germany.
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Takeuchi F, Komaki H, Rodger S, Kirschner J, Kimura E, Takeda S, Gramsch K, Vry J, Bushby K, Lochmuller H, Wada K, Nakamura H. A comparative study of care and support for young boys with Duchenne muscular dystrophy between Japan and European countries: Implications of early diagnosis. Neuromuscul Disord 2016. [DOI: 10.1016/j.nmd.2016.06.137] [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: 10/21/2022]
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