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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] [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] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Moll CJ, Meister K, Kirschner J, Bakker HJ. Surface Structure of Solutions of Poly(vinyl alcohol) in Water. J Phys Chem B 2018; 122:10722-10727. [PMID: 30372078 DOI: 10.1021/acs.jpcb.8b08374] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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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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] [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] [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] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Accepted: 03/20/2018] [Indexed: 10/17/2022]
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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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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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] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Chen YJ, Zakeri K, Ernst A, Qin HJ, Meng Y, Kirschner J. Group Velocity Engineering of Confined Ultrafast Magnons. PHYSICAL REVIEW LETTERS 2017; 119:267201. [PMID: 29328716 DOI: 10.1103/physrevlett.119.267201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [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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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] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Li CH, Tusche C, Schumann FO, Kirschner J. Correlated Electron Dynamics at Surfaces Investigated via He^{2+} Ion Neutralization. PHYSICAL REVIEW LETTERS 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] [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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Qin HJ, Zakeri K, Ernst A, Kirschner J. Temperature Dependence of Magnetic Excitations: Terahertz Magnons above the Curie Temperature. PHYSICAL REVIEW LETTERS 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] [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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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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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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] [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] [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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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. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 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] [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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Vasilyev D, Kirschner J. Spin-polarized electron energy loss spectroscopy at high momentum resolution. SURF INTERFACE ANAL 2016. [DOI: 10.1002/sia.6093] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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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] [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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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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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