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Holzapfel WB, Klotz S. Thermophysical properties of H2O and D2O ice Ih with contributions from proton disorder, quenching, relaxation, and extended defects: A model case for solids with quenching and relaxation. J Chem Phys 2024; 160:154508. [PMID: 38634494 DOI: 10.1063/5.0203614] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2024] [Accepted: 04/01/2024] [Indexed: 04/19/2024] Open
Abstract
Application of the coherent thermodynamic model [W. Holzapfel and S. Klotz, J. Chem. Phys. 155, 024506 (2021)] for H2O ice Ih to the more detailed data for D2O ice Ih provides better insight into the contributions from quenched proton disorder and offers a new basis for understanding the apparent differences between the data for thermal expansion measured with neutron diffraction on polycrystalline samples [A. Fortes, Acta Crystallogr., Sect. B: Struct. Sci., Cryst. Eng. Mater. 74, 196 (2018) and A. Fortes, Phys. Chem. Chem. Phys 21, 8264 (2019)] and macroscopic dilatation measurements on single crystals [D. Buckingham et al., Phys. Rev. Lett. 121, 185505 (2018)]. The comparison points to contributions from defects effecting the two techniques in different ways. The uncertainties in thermodynamic data due to the contributions from proton disorder and additional defects are compared with the "reference data" [R. Feistel and W. Wagner, J. Phys. Chem. Ref. Data 35, 1021 (2006)] for H2O ice Ih.
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Affiliation(s)
- W B Holzapfel
- Department Physik, Universität Paderborn, Paderborn D-33095, Germany
| | - S Klotz
- IMPMC, CNRS UMR 7590, Sorbonne Université, 4 Place Jussieu, Paris F-75252, France
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2
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Radtke G, Klotz S, Lazzeri M, Loubeyre P, Krisch M, Bossak A. Phonon Dispersion and Proton Disorder of Ice VII and VIII. Phys Rev Lett 2024; 132:056102. [PMID: 38364173 DOI: 10.1103/physrevlett.132.056102] [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: 03/21/2023] [Revised: 09/29/2023] [Accepted: 11/16/2023] [Indexed: 02/18/2024]
Abstract
The phonon dispersion of ice VII and that of its proton-ordered analog ice VIII are investigated through a combination of inelastic x-ray scattering (IXS) measurements and first-principles calculations of the oxygen sublattice dynamic structure factor. Particular attention is devoted to hydrogen-disorder in ice VII, addressed theoretically through a statistical ensemble of fictitious ordered supercell configurations. Similar phonon densities of states are found in both phases but are significantly less structured in the case of ice VII. Our data further show that, despite a full proton disorder, the acoustic phonon branches in this phase clearly inherit the periodicity of its body-centered cubic oxygen lattice. The calculations predict, however, the presence of gap openings in the one-atom phonon dispersion. These predictions are supported by revisiting the analysis of previous single-crystal IXS measurements along the longitudinal [111] branch of ice VII.
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Affiliation(s)
- G Radtke
- Sorbonne Université, CNRS UMR 7590, MNHN, IRD, Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), 4 place Jussieu, CEDEX 05, 75252 Paris, France
| | - S Klotz
- Sorbonne Université, CNRS UMR 7590, MNHN, IRD, Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), 4 place Jussieu, CEDEX 05, 75252 Paris, France
| | - M Lazzeri
- Sorbonne Université, CNRS UMR 7590, MNHN, IRD, Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), 4 place Jussieu, CEDEX 05, 75252 Paris, France
| | - P Loubeyre
- CEA, DAM, DIF, 91297 Arpajon Cedex, France and Université Paris-Saclay, CEA, Laboratoire Matière en Conditions Extrêmes, 91680 Bruyères le Châtel, France
| | - M Krisch
- European Synchrotron Radiation Facility (ESRF), 71 Avenue des Martyrs, 38000 Grenoble, France
| | - A Bossak
- European Synchrotron Radiation Facility (ESRF), 71 Avenue des Martyrs, 38000 Grenoble, France
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3
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Zhang H, Datchi F, Andriambariarijaona L, Rescigno M, Bove LE, Klotz S, Ninet S. Observation of a Plastic Crystal in Water-Ammonia Mixtures under High Pressure and Temperature. J Phys Chem Lett 2023; 14:2301-2307. [PMID: 36847363 DOI: 10.1021/acs.jpclett.3c00092] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Solid mixtures of ammonia and water, the so-called ammonia hydrates, are thought to be major components of solar and extra-solar icy planets. We present here a thorough characterization of the recently reported high pressure (P)-temperature (T) phase VII of ammonia monohydrate (AMH) using Raman spectroscopy, X-ray diffraction, and quasi-elastic neutron scattering (QENS) experiments in the ranges 4-10 GPa, 450-600 K. Our results show that AMH-VII exhibits common structural features with the disordered ionico-molecular alloy (DIMA) phase, stable above 7.5 GPa at 300 K: both present a substitutional disorder of water and ammonia over the sites of a body-centered cubic lattice and are partially ionic. The two phases however markedly differ in their hydrogen dynamics, and QENS measurements show that AMH-VII is characterized by free molecular rotations around the lattice positions which are quenched in the DIMA phase. AMH-VII is thus a peculiar crystalline solid in that it combines three types of disorder: substitutional, compositional, and rotational.
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Affiliation(s)
- H Zhang
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Sorbonne Université, CNRS UMR 7590, MNHN, 4, place Jussieu, Paris 75005, France
- Shandong Key Laboratory of Optical Communication Science and Technology, School of Physics Science and Information Technology, Liaocheng University, Liaocheng 252059, China
| | - F Datchi
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Sorbonne Université, CNRS UMR 7590, MNHN, 4, place Jussieu, Paris 75005, France
| | - L Andriambariarijaona
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Sorbonne Université, CNRS UMR 7590, MNHN, 4, place Jussieu, Paris 75005, France
| | - M Rescigno
- Dipartimento di Fisica, Universita di Roma La Sapienza, Piazzale Aldo Moro 5, 00185 Roma, Italy
| | - L E Bove
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Sorbonne Université, CNRS UMR 7590, MNHN, 4, place Jussieu, Paris 75005, France
- Dipartimento di Fisica, Universita di Roma La Sapienza, Piazzale Aldo Moro 5, 00185 Roma, Italy
- LQM, Institute of Physics, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - S Klotz
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Sorbonne Université, CNRS UMR 7590, MNHN, 4, place Jussieu, Paris 75005, France
| | - S Ninet
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Sorbonne Université, CNRS UMR 7590, MNHN, 4, place Jussieu, Paris 75005, France
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Greutter L, Miller-Michlits Y, Klotz S, Miller-Michlits A, Roetzer-Pejrimovsky T, Baumann B, Kiesel B, Kovacs GG, Stepper P, Woehrer A. OS02.5.A Alzheimer-type neuropathological changes in glioblastoma-adjacent cortex. Neuro Oncol 2022. [DOI: 10.1093/neuonc/noac174.033] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Glioblastoma (GBM) is an aggressive type of brain cancer that is prevalent and fatal in the elderly. Age is not only the most common risk factor for brain cancer but also for neurodegenerative diseases, and previous studies have indicated an excess risk of co-occurrence of both diseases. Here, we aim to map Alzheimer (AD)-related pathology in GBM-adjacent cortex.
Material and Methods
To this end, we have screened a cohort of 99 individuals with 200 tissue samples comprising tumor and adjacent cortex, including longitudinal samples in 13 patients. The samples were provided by the Division of Neuropathology and Neurochemistry, Medical University of Vienna from 2002 to 2021. Age and tumor location were abstracted from clinical data where available. All samples were stained for A-beta, tau-AT8 and NeuN using immunohistochemistry. Whole slide scans were segmented and protein deposits were quantified with QuPath. Further statistical analyses were conducted with R. Tau pathology was recorded as neurofibrillary tangles, neuropil threads, and astroglial pathology. Likewise, amyloid pathology was assessed as plaques and/or cerebral amyloid angiopathy (CAA). For both proteins, deposits were grouped into: absent, mild, moderate, and severe.
Results
In the total cohort, median age was 67.5 ys (range 20-92 ys), the female-to-male ratio 0.68. Overall 44.4 % (n=44/99) showed any type of A-beta and/or taupathology, which was strongly correlated with age (R=0.26, p= 0.001). Among them, 38.6 % (n=17/44) had combined pathology, while 36.4 % (n=16/44) displayed pure amyloid-beta, and 25 % (n=11/44) only tau pathology. A-beta pathology comprised plaques in 74.4 % (n=29/39) and CAA in 28.2 % (n=11/29). Consistent with the spatiotemporal evolution of AD, neurofibrillary tangle load was highest in the temporal lobe (42.9 % n=21/49), while plaque load was most prevalent in the occipital lobe (62.5 % n=5/8). This pattern was accentuated in patients above age 65, while it deviated in those below age 65. Over time, the AD-type pathology increased in 38.4 % (n=5/13) and remained stable in 53.8 % (n=7/13) of recurrent tumors. Total cell densities in tumor-infiltrated cortex ranged from 474 to 7,540 cells/mm2, being similar across all lobes. Higher cell density correlated with decreased neuronal counts (R= -0.46, p<0.0001) and decreased AD-load (R= -0.25, p= 0.002).
Conclusion
Collectively, our results establish frequent co-occurrence of Alzheimer disease neuropathological changes in the GBM-adjacent cortex. They prompt further investigation of shared pathogenic mechanisms and seek to raise awareness for synergistic effects on cognitive decline.
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Affiliation(s)
- L Greutter
- Medical University of Vienna , Vienna , Austria
| | | | - S Klotz
- Medical University of Vienna , Vienna , Austria
| | | | | | - B Baumann
- Medical University of Vienna , Vienna , Austria
| | - B Kiesel
- Medical University of Vienna , Vienna , Austria
| | - G G Kovacs
- University of Toronto, Toronto, ON , Canada
| | - P Stepper
- Research Center for Molecular Medicine of the Austrian Academy of Science CEMM , Vienna , Austria
| | - A Woehrer
- Medical University of Vienna , Vienna , Austria
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Klotz S, Baptiste B, Hattori T, Feng S, Jin C, Béneut K, Guigner J, Estève I. High-pressure polymerisation of CS 2: 'Bridgman's black' revisited. Acta Cryst Sect A 2022. [DOI: 10.1107/s2053273322091161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/19/2023]
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Kofler J, Beltran-Quintero ML, Rugari A, Zuccoli G, Klotz S, Escolar ML. Improved Brain Pathology and Progressive Peripheral Neuropathy in a 15 Year Old Survivor of Infantile Krabbe Disease Treated With Umbilical Cord Transplantation. Front Mol Neurosci 2022; 15:888231. [PMID: 35966016 PMCID: PMC9368320 DOI: 10.3389/fnmol.2022.888231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Accepted: 06/16/2022] [Indexed: 12/05/2022] Open
Abstract
Objective Krabbe disease is a fatal leukodystrophy caused by deficiency in galactocerebrosidase enzyme activity. The only currently available therapy is hematopoietic stem cell transplantation with bone marrow or umbilical cord blood (UCBT), which leads to increased lifespan and functional abilities when performed in the preclinical stage. While stabilization of white matter disease has been seen on serial MRI studies, neuropathological changes following transplantation have not been documented so far. Materials and Methods We report the first postmortem examination of a 15-year-old female patient with infantile Krabbe disease after UCBT in infancy. Results In contrast to an untreated Krabbe disease brain, which showed severe myelin and oligodendrocyte loss with occasional globoid cells, the transplanted brain displayed markedly improved myelin preservation, but not reaching normal myelination levels. Consistent with the transplanted patient’s clinical presentation of pronounced deficits in gross motor skills, corticospinal tracts were most severely affected. No globoid cells or evidence of active demyelination were observed in the central nervous system, indicative of at least partially successful functional restoration. This was corroborated by the identification of male donor-derived cells in the brain by in situ hybridization. Unlike the observed disease stabilization in the central nervous system, the patient experienced progressive peripheral neuropathy. While diminished macrophage infiltration was seen postmortem, peripheral nerves exhibited edema, myelin and axon loss and persistent Schwann cell ultrastructural inclusions. Conclusion Umbilical cord blood transplantation was able to alter the natural disease progression in the central but less so in the peripheral nervous system, possibly due to limited cross-correction of Schwann cells.
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Affiliation(s)
- Julia Kofler
- Division of Neuropathology, Department of Pathology, University of Pittsburgh, Pittsburgh, PA, United States
| | - Maria L. Beltran-Quintero
- Program for the Study of Neurodevelopment in Rare Disorders, UPMC Children’s Hospital of Pittsburgh, University of Pittsburgh Medical Center, Pittsburgh, PA, United States
| | - Anne Rugari
- Partners for Krabbe Research, Cincinnati, OH, United States
| | - Giulio Zuccoli
- Program for the Study of Neurodevelopment in Rare Disorders, UPMC Children’s Hospital of Pittsburgh, University of Pittsburgh Medical Center, Pittsburgh, PA, United States
| | - Sarah Klotz
- Program for the Study of Neurodevelopment in Rare Disorders, UPMC Children’s Hospital of Pittsburgh, University of Pittsburgh Medical Center, Pittsburgh, PA, United States
| | - Maria L. Escolar
- Program for the Study of Neurodevelopment in Rare Disorders, UPMC Children’s Hospital of Pittsburgh, University of Pittsburgh Medical Center, Pittsburgh, PA, United States
- *Correspondence: Maria L. Escolar,
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Queyroux JA, Hernandez JA, Weck G, Ninet S, Plisson T, Klotz S, Garbarino G, Guignot N, Mezouar M, Hanfland M, Itié JP, Datchi F. Melting Curve and Isostructural Solid Transition in Superionic Ice. Phys Rev Lett 2020; 125:195501. [PMID: 33216588 DOI: 10.1103/physrevlett.125.195501] [Citation(s) in RCA: 6] [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] [Received: 07/22/2020] [Accepted: 09/28/2020] [Indexed: 06/11/2023]
Abstract
The phase diagram and melting curve of water ice is investigated up to 45 GPa and 1600 K by synchrotron x-ray diffraction in the resistively and laser heated diamond anvil cell. Our melting data evidence a triple point at 14.6 GPa, 850 K. The latter is shown to be related to a first-order solid transition from the dynamically disordered form of ice VII, denoted ice VII^{'}, toward a high-temperature phase with the same bcc oxygen lattice but larger volume and higher entropy. Our experiments are compared to ab initio molecular dynamics simulations, enabling us to identify the high-temperature bcc phase with the predicted superionic ice VII^{''} phase [J.-A. Hernandez and R. Caracas, Phys. Rev. Lett. 117, 135503 (2016).PRLTAO0031-900710.1103/PhysRevLett.117.135503].
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Affiliation(s)
- J-A Queyroux
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Sorbonne Université, CNRS UMR 7590, Muséum National d'Histoire Naturelle, 4 place Jussieu, F-75005 Paris, France
- Commissariat à l'Energie Atomique (CEA), Direction des Applications Militaires (DAM), DAM Ile-de-France (DIF), F-91297 Arpajon, France
| | - J-A Hernandez
- Centre for Earth Evolution and Dynamics, University of Oslo, 1028 Blindern, N-0315 Oslo, Norway
| | - G Weck
- Commissariat à l'Energie Atomique (CEA), Direction des Applications Militaires (DAM), DAM Ile-de-France (DIF), F-91297 Arpajon, France
| | - S Ninet
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Sorbonne Université, CNRS UMR 7590, Muséum National d'Histoire Naturelle, 4 place Jussieu, F-75005 Paris, France
| | - T Plisson
- Commissariat à l'Energie Atomique (CEA), Direction des Applications Militaires (DAM), DAM Ile-de-France (DIF), F-91297 Arpajon, France
| | - S Klotz
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Sorbonne Université, CNRS UMR 7590, Muséum National d'Histoire Naturelle, 4 place Jussieu, F-75005 Paris, France
| | - G Garbarino
- European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble Cedex, France
| | - N Guignot
- Synchrotron Soleil, L'Orme des Merisiers, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette Cedex, France
| | - M Mezouar
- European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble Cedex, France
| | - M Hanfland
- European Synchrotron Radiation Facility, BP 220, F-38043 Grenoble Cedex, France
| | - J-P Itié
- Synchrotron Soleil, L'Orme des Merisiers, Saint-Aubin, BP 48, 91192 Gif-sur-Yvette Cedex, France
| | - F Datchi
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie (IMPMC), Sorbonne Université, CNRS UMR 7590, Muséum National d'Histoire Naturelle, 4 place Jussieu, F-75005 Paris, France
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Wurm R, Klotz S, Rahimi J, Katzenschlager R, Lindeck-Pozza E, Regelsberger G, Danics K, Kapas I, Bíró ZA, Stögmann E, Gelpi E, Kovacs GG. Argyrophilic grain disease in individuals younger than 75 years: clinical variability in an under-recognized limbic tauopathy. Eur J Neurol 2020; 27:1856-1866. [PMID: 32402145 DOI: 10.1111/ene.14321] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [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: 03/17/2020] [Accepted: 05/07/2020] [Indexed: 12/14/2022]
Abstract
BACKGROUND AND PURPOSE Argyrophilic grain disease (AGD) is a limbic-predominant 4R-tauopathy. AGD is thought to be an age-related disorder and is frequently detected as a concomitant pathology with other neurodegenerative conditions. There is a paucity of data on the clinical phenotype of pure AGD. In elderly patients, however, AGD pathology frequently associates with cognitive decline, personality changes, urine incontinence and cachexia. In this study, clinicopathological findings were analysed in individuals younger than 75. METHODS Patients were identified retrospectively based on neuropathological examinations during 2006-2017 and selected when AGD was the primary and dominant pathological finding. Clinical data were obtained retrospectively through medical records. RESULTS In all, 55 patients (2% of all examinations performed during that period) with AGD were identified. In seven cases (13%) AGD was the primary neuropathological diagnosis without significant concomitant pathologies. Two patients were female, median age at the time of death was 64 years (range 51-74) and the median duration of disease was 3 months (range 0.5-36). The most frequent symptoms were progressive cognitive decline, urinary incontinence, seizures and psychiatric symptoms. Brain magnetic resonance imaging revealed mild temporal atrophy. CONCLUSIONS Argyrophilic grain disease is a rarely recognized limbic tauopathy in younger individuals. Widening the clinicopathological spectrum of tauopathies may allow identification of further patients who could benefit from tau-based therapeutic strategies.
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Affiliation(s)
- R Wurm
- Department of Neurology, Medical University of Vienna, Vienna, Austria
| | - S Klotz
- Department of Neurology, Medical University of Vienna, Vienna, Austria.,Department of Neurology, Division of Neuropathology and Neurochemistry, Medical University of Vienna, Vienna, Austria
| | - J Rahimi
- Department of Neurology and Karl Landsteiner Institute for Neuroimmunological and Neurodegenerative Disorders, Danube Hospital, Vienna, Austria
| | - R Katzenschlager
- Department of Neurology and Karl Landsteiner Institute for Neuroimmunological and Neurodegenerative Disorders, Danube Hospital, Vienna, Austria
| | - E Lindeck-Pozza
- Department of Neurology, Sozialmedizinisches Zentrum Süd Kaiser-Franz-Josef-Spital, Vienna, Austria
| | - G Regelsberger
- Department of Neurology, Division of Neuropathology and Neurochemistry, Medical University of Vienna, Vienna, Austria
| | - K Danics
- Neuropathology and Prion Disease Reference Center, Department of Forensic and Insurance Medicine, Semmelweis University, Budapest, Hungary
| | - I Kapas
- Neurology and Stroke Department, Szt. Janos Hospital, Budapest, Hungary
| | - Z A Bíró
- Department of Neurology, Pest County Flor Ferenc Hospital, Kistarcsa, Hungary
| | - E Stögmann
- Department of Neurology, Medical University of Vienna, Vienna, Austria
| | - E Gelpi
- Department of Neurology, Sozialmedizinisches Zentrum Süd Kaiser-Franz-Josef-Spital, Vienna, Austria
| | - G G Kovacs
- Department of Neurology, Medical University of Vienna, Vienna, Austria.,Department of Neurology, Division of Neuropathology and Neurochemistry, Medical University of Vienna, Vienna, Austria.,Department of Laboratory Medicine and Pathobiology and Tanz Centre for Research in Neurodegenerative Disease, University of Toronto, Toronto, ON, Canada.,Laboratory Medicine Program and Krembil Brain Institute, University Health Network, Toronto, ON, Canada
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Gasser C, Delazer I, Neuner E, Pascher K, Brillet K, Klotz S, Trixl L, Himmelstoß M, Ennifar E, Rieder D, Lusser A, Micura R. Thioguanosine Conversion Enables mRNA‐Lifetime Evaluation by RNA Sequencing Using Double Metabolic Labeling (TUC‐seq DUAL). Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201916272] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Catherina Gasser
- Institute of Organic Chemistry and Center for Molecular BiosciencesLeopold-Franzens University Innrain 80 6020 Innsbruck Austria
| | - Isabel Delazer
- Institute of Molecular BiologyBiocenterMedical University of Innsbruck Innrain 82 6020 Innsbruck Austria
| | - Eva Neuner
- Institute of Organic Chemistry and Center for Molecular BiosciencesLeopold-Franzens University Innrain 80 6020 Innsbruck Austria
| | - Katharina Pascher
- Institute of Molecular BiologyBiocenterMedical University of Innsbruck Innrain 82 6020 Innsbruck Austria
| | - Karl Brillet
- Université de StrasbourgArchitecture et Réactivité de l'ARN—CNRS UPR 9002Institut de Biologie Moléculaire et Cellulaire 67000 Strasbourg France
| | - Sarah Klotz
- Institute of Organic Chemistry and Center for Molecular BiosciencesLeopold-Franzens University Innrain 80 6020 Innsbruck Austria
| | - Lukas Trixl
- Institute of Molecular BiologyBiocenterMedical University of Innsbruck Innrain 82 6020 Innsbruck Austria
| | - Maximilian Himmelstoß
- Institute of Organic Chemistry and Center for Molecular BiosciencesLeopold-Franzens University Innrain 80 6020 Innsbruck Austria
| | - Eric Ennifar
- Université de StrasbourgArchitecture et Réactivité de l'ARN—CNRS UPR 9002Institut de Biologie Moléculaire et Cellulaire 67000 Strasbourg France
| | - Dietmar Rieder
- Institute of BioinformaticsBiocenterMedical University of Innsbruck Innrain 82 6020 Innsbruck Austria
| | - Alexandra Lusser
- Institute of Molecular BiologyBiocenterMedical University of Innsbruck Innrain 82 6020 Innsbruck Austria
| | - Ronald Micura
- Institute of Organic Chemistry and Center for Molecular BiosciencesLeopold-Franzens University Innrain 80 6020 Innsbruck Austria
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10
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Gasser C, Delazer I, Neuner E, Pascher K, Brillet K, Klotz S, Trixl L, Himmelstoß M, Ennifar E, Rieder D, Lusser A, Micura R. Thioguanosine Conversion Enables mRNA-Lifetime Evaluation by RNA Sequencing Using Double Metabolic Labeling (TUC-seq DUAL). Angew Chem Int Ed Engl 2020; 59:6881-6886. [PMID: 31999864 PMCID: PMC7186826 DOI: 10.1002/anie.201916272] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Indexed: 12/24/2022]
Abstract
Temporal information about cellular RNA populations is essential to understand the functional roles of RNA. We have developed the hydrazine/NH4 Cl/OsO4 -based conversion of 6-thioguanosine (6sG) into A', where A' constitutes a 6-hydrazino purine derivative. A' retains the Watson-Crick base-pair mode and is efficiently decoded as adenosine in primer extension assays and in RNA sequencing. Because 6sG is applicable to metabolic labeling of freshly synthesized RNA and because the conversion chemistry is fully compatible with the conversion of the frequently used metabolic label 4-thiouridine (4sU) into C, the combination of both modified nucleosides in dual-labeling setups enables high accuracy measurements of RNA decay. This approach, termed TUC-seq DUAL, uses the two modified nucleosides in subsequent pulses and their simultaneous detection, enabling mRNA-lifetime evaluation with unprecedented precision.
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Affiliation(s)
- Catherina Gasser
- Institute of Organic Chemistry and Center for Molecular Biosciences, Leopold-Franzens University, Innrain 80, 6020, Innsbruck, Austria
| | - Isabel Delazer
- Institute of Molecular Biology, Biocenter, Medical University of Innsbruck, Innrain 82, 6020, Innsbruck, Austria
| | - Eva Neuner
- Institute of Organic Chemistry and Center for Molecular Biosciences, Leopold-Franzens University, Innrain 80, 6020, Innsbruck, Austria
| | - Katharina Pascher
- Institute of Molecular Biology, Biocenter, Medical University of Innsbruck, Innrain 82, 6020, Innsbruck, Austria
| | - Karl Brillet
- Université de Strasbourg, Architecture et Réactivité de l'ARN-CNRS UPR 9002, Institut de Biologie Moléculaire et Cellulaire, 67000, Strasbourg, France
| | - Sarah Klotz
- Institute of Organic Chemistry and Center for Molecular Biosciences, Leopold-Franzens University, Innrain 80, 6020, Innsbruck, Austria
| | - Lukas Trixl
- Institute of Molecular Biology, Biocenter, Medical University of Innsbruck, Innrain 82, 6020, Innsbruck, Austria
| | - Maximilian Himmelstoß
- Institute of Organic Chemistry and Center for Molecular Biosciences, Leopold-Franzens University, Innrain 80, 6020, Innsbruck, Austria
| | - Eric Ennifar
- Université de Strasbourg, Architecture et Réactivité de l'ARN-CNRS UPR 9002, Institut de Biologie Moléculaire et Cellulaire, 67000, Strasbourg, France
| | - Dietmar Rieder
- Institute of Bioinformatics, Biocenter, Medical University of Innsbruck, Innrain 82, 6020, Innsbruck, Austria
| | - Alexandra Lusser
- Institute of Molecular Biology, Biocenter, Medical University of Innsbruck, Innrain 82, 6020, Innsbruck, Austria
| | - Ronald Micura
- Institute of Organic Chemistry and Center for Molecular Biosciences, Leopold-Franzens University, Innrain 80, 6020, Innsbruck, Austria
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11
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Kibble M, Laliena V, Goodway C, Lelièvre-Berna E, Kamenev K, Klotz S, Kirichek O. Low-background materials for high pressure cells used in inelastic neutron scattering experiments. JNR 2020. [DOI: 10.3233/jnr-190115] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- M.G. Kibble
- ISIS Facility, STFC, Rutherford Appleton Laboratory, Harwell, Didcot, UK. E-mails: , ,
| | - V. Laliena
- Instituto de Ciencia de Materiales de Aragón (ICMA), Univ. de Zaragoza-CSIC, Zaragoza, Spain. E-mail:
| | - C.M. Goodway
- ISIS Facility, STFC, Rutherford Appleton Laboratory, Harwell, Didcot, UK. E-mails: , ,
| | | | - K.V. Kamenev
- Centre for Science at Extreme Conditions, University of Edinburgh, Edinburgh, UK. E-mail:
| | - S. Klotz
- Sorbonne Université, CNRS UMR 7590, IMPMC, Paris, France. E-mail:
| | - O. Kirichek
- ISIS Facility, STFC, Rutherford Appleton Laboratory, Harwell, Didcot, UK. E-mails: , ,
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12
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Klotz S, Hansen T, Lelièvre-Berna E, Amand L, Maurice J, Payre C. Advances in the use of Paris-Edinburgh presses for high pressure neutron scattering. JNR 2020. [DOI: 10.3233/jnr-190120] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- S. Klotz
- Sorbonne Université, IMPMC, UMR 7590, 4 Place Jussieu, 75252 Paris, France. E-mails: ,
| | - Th. Hansen
- Institut Laue-Langevin (ILL), 71 Avenue des Martyrs, 38042 Grenoble, France. E-mails: , , ,
| | - E. Lelièvre-Berna
- Institut Laue-Langevin (ILL), 71 Avenue des Martyrs, 38042 Grenoble, France. E-mails: , , ,
| | - L. Amand
- Sorbonne Université, IMPMC, UMR 7590, 4 Place Jussieu, 75252 Paris, France. E-mails: ,
| | - J. Maurice
- Institut Laue-Langevin (ILL), 71 Avenue des Martyrs, 38042 Grenoble, France. E-mails: , , ,
| | - C. Payre
- Institut Laue-Langevin (ILL), 71 Avenue des Martyrs, 38042 Grenoble, France. E-mails: , , ,
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13
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Klotz S, Boeken U. Zur „S3-Leitlinie Invasive Beatmung und Einsatz extrakorporaler Verfahren bei akuter respiratorischer Insuffizienz“. Z Herz- Thorax- Gefäßchir 2019. [DOI: 10.1007/s00398-018-0256-4] [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: 01/28/2023]
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14
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Schmitto J, Dogan G, Hanke S, Riebandt J, Ozbaran M, Engin C, Kervan U, Paç M, Horvath V, Klotz S, Wagner F, Roussel C, Shrestha M, Feldmann C, Chatterjee A, Martens A, Zimpfer D. A Multicenter Analysis of Implantation via a Thoracotomy Approach of a Left Ventricular Assist System for the Treatment of Advanced Heart Failure. Thorac Cardiovasc Surg 2019. [DOI: 10.1055/s-0039-1678824] [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: 10/27/2022]
Affiliation(s)
- J. Schmitto
- Department of Cardiothoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - G. Dogan
- Department of Cardiothoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - S. Hanke
- Department of Cardiothoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - J. Riebandt
- Division of Cardiac Surgery, Department of Surgery, Medical University of Vienna, Vienna, Austria
| | - M. Ozbaran
- Department of Cardiovasculary Surgery, Ege University School of Medicine, Izmir, Turkey
| | - C. Engin
- Department of Cardiovasculary Surgery, Ege University School of Medicine, Izmir, Turkey
| | - U. Kervan
- Department of Heart Transplantation, Turkiye Yuksek Ihtisas Training and Research Hospital, Ankara, Turkey
| | - M. Paç
- Department of Heart Transplantation, Turkiye Yuksek Ihtisas Training and Research Hospital, Ankara, Turkey
| | - V. Horvath
- Center of Cardiovascular and Transplant Surgery, Brno, Czech Republic
| | - S. Klotz
- Department of Cardiac and Thoracic Vascular Surgery, University Hospital of Luebeck, Luebeck, Germany
| | - F. Wagner
- Department of Cardiac Surgery, Asklepios Clinic St. Georg, Hamburg, Germany
| | - C. Roussel
- Department of Thoracic and CardioVascular Surgery, Nantes Hospital University, Saint-Herblain, France
| | - M. Shrestha
- Department of Cardiothoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - C. Feldmann
- Department of Cardiothoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - A. Chatterjee
- Department of Cardiothoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - A. Martens
- Department of Cardiothoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - D. Zimpfer
- Division of Cardiac Surgery, Department of Surgery, Medical University of Vienna, Vienna, Austria
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15
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Schmitto D, Dogan G, Hanke S, Riebandt J, Ozbaran M, Engin C, Kervan U, Paç M, Horvath V, Klotz S, Wagner F, Roussel C, Shrestha M, Feldmann C, Chatterjee A, Martens A, Zimpfer D. Alternative Outflow Graft Placement during Thoracotomy Implant of the HVAD System for the Treatment of Advanced Heart Failure. Thorac Cardiovasc Surg 2019. [DOI: 10.1055/s-0039-1679026] [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: 10/27/2022]
Affiliation(s)
- D. Schmitto
- Department of Cardiothoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - G. Dogan
- Department of Cardiothoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - S. Hanke
- Department of Cardiothoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - J. Riebandt
- Division of Cardiac Surgery, Department of Surgery, Medical University of Vienna, Vienna, Austria
| | - M. Ozbaran
- Department of Cardiovascular Surgery, Ege University School of Medicine, Izmir, Turkey
| | - C. Engin
- Department of Cardiovascular Surgery, Ege University School of Medicine, Izmir, Turkey
| | - U. Kervan
- Department of Heart Transplantation, Turkiye Yuksek Ihtisas Training and Research Hospital, Ankara, Turkey
| | - M. Paç
- Department of Heart Transplantation, Turkiye Yuksek Ihtisas Training and Research Hospital, Ankara, Turkey
| | - V. Horvath
- Center of Cardiovascular and Transplant Surgery, Brno, Czech Republic
| | - S. Klotz
- Department of Cardiac and Thoracic Vascular Surgery, University Hospital of Luebeck, Lübeck, Germany
| | - F. Wagner
- Department of Cardiac Surgery, Asklepios Clinic St. Georg, Hamburg, Germany
| | - C. Roussel
- Department of Thoracic and Cardiovascular Surgery, Nantes Hospital University, Saint-Herblain, France
| | - M. Shrestha
- Department of Cardiothoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - C. Feldmann
- Department of Cardiothoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - A. Chatterjee
- Department of Cardiothoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - A. Martens
- Department of Cardiothoracic, Transplantation and Vascular Surgery, Hannover Medical School, Hannover, Germany
| | - D. Zimpfer
- Division of Cardiac Surgery, Department of Surgery, Medical University of Vienna, Vienna, Austria
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16
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Pallavi P, Pretze M, Caballero J, Li Y, Hofmann BB, Stamellou E, Klotz S, Wängler C, Wängler B, Loesel R, Roth S, Theisinger B, Moerz H, Binzen U, Greffrath W, Treede RD, Harmsen MC, Krämer BK, Hafner M, Yard BA, Kälsch AI. Analyses of Synthetic N-Acyl Dopamine Derivatives Revealing Different Structural Requirements for Their Anti-inflammatory and Transient-Receptor-Potential-Channel-of-the-Vanilloid-Receptor-Subfamily-Subtype-1 (TRPV1)-Activating Properties. J Med Chem 2018. [PMID: 29543451 DOI: 10.1021/acs.jmedchem.8b00156] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
We studied the chemical entities within N-octanoyl dopamine (NOD) responsible for the activation of transient-receptor-potential channels of the vanilloid-receptor subtype 1 (TRPV1) and inhibition of inflammation. The potency of NOD in activating TRPV1 was significantly higher compared with those of variants in which the ortho-dihydroxy groups were acetylated, one of the hydroxy groups was omitted ( N-octanoyl tyramine), or the ester functionality consisted of a bulky fatty acid ( N-pivaloyl dopamine). Shortening of the amide linker (ΔNOD) slightly increased its potency, which was further increased when the carbonyl and amide groups (ΔNODR) were interchanged. With the exception of ΔNOD, the presence of an intact catechol structure was obligatory for the inhibition of VCAM-1 and the induction of HO-1 expression. Because TRPV1 activation and the inhibition of inflammation by N-acyl dopamines require different structural entities, our findings provide a framework for the rational design of TRPV1 agonists with improved anti-inflammatory properties.
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Affiliation(s)
- Prama Pallavi
- Institute for Molecular and Cellular Biology , Mannheim University of Applied Sciences , Mannheim 68163 , Germany
| | | | - Julio Caballero
- Center for Bioinformatics and Molecular Simulations, Faculty of Engineering in Bioinformatics , Universidad de Talca , Talca 3460000 , Chile
| | | | | | | | | | | | | | - Ralf Loesel
- Department of Applied Chemistry , Technical University of Applied Sciences , Nuremberg 90489 , Germany
| | - Steffen Roth
- Department of Applied Chemistry , Technical University of Applied Sciences , Nuremberg 90489 , Germany
| | | | | | | | | | | | - Martin C Harmsen
- Department of Pathology and Medical Biology, University Medical Centre Groningen , University of Groningen , Groningen 9713 , The Netherlands
| | | | - Mathias Hafner
- Institute for Molecular and Cellular Biology , Mannheim University of Applied Sciences , Mannheim 68163 , Germany
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17
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Zimpfer D, Schmitto J, Horvath V, Klotz S, Kervan U, Pac M, Roussel J. Alternative Outflow Graft Placement During Thoracotomy Implant of the HVAD System for the Treatment of Advanced Heart Failure. J Heart Lung Transplant 2018. [DOI: 10.1016/j.healun.2018.01.354] [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: 11/25/2022] Open
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18
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Klotz S, Desch S, Karluss A, Stock S, Sievers H. Outflow Graft Occlusion with Vascular Plug as Interventional Alternative for LVAD Discontinuation. Thorac Cardiovasc Surg 2018. [DOI: 10.1055/s-0038-1628078] [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. Klotz
- Klinik für Herz- und thorakale Gefäßchirurgie, Universitätsklinikum Schleswig-Holstein, Campus Lübeck, Lübeck, Germany
| | - S. Desch
- Klinik für Kardiologie, Angiologie und Intensivmedizin, Universitätsklinikum Schleswig-Holstein, Campus Lübeck, Lübeck, Germany
| | - A. Karluss
- Klinik für Herz- und thorakale Gefäßchirurgie, Universitätsklinikum Schleswig-Holstein, Campus Lübeck, Lübeck, Germany
| | - S. Stock
- Klinik für Herz- und thorakale Gefäßchirurgie, Universitätsklinikum Schleswig-Holstein, Campus Lübeck, Lübeck, Germany
| | - H. Sievers
- Klinik für Herz- und thorakale Gefäßchirurgie, Universitätsklinikum Schleswig-Holstein, Campus Lübeck, Lübeck, Germany
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19
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Klotz S, Petersen M, Bucsky B, Stock S, Sievers H. Outcome of Valve-sparing vs Bentall Procedure in Acute Type A Aortic Dissection. Thorac Cardiovasc Surg 2018. [DOI: 10.1055/s-0038-1627851] [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. Klotz
- Campus Lübeck, Klinik für Herz- und thorakale Gefäßchirurgie, Universitätsklinikum Schleswig-Holstein, Lübeck, Germany
| | - M. Petersen
- Campus Lübeck, Klinik für Herz- und thorakale Gefäßchirurgie, Universitätsklinikum Schleswig-Holstein, Lübeck, Germany
| | - B. Bucsky
- Campus Lübeck, Klinik für Herz- und thorakale Gefäßchirurgie, Universitätsklinikum Schleswig-Holstein, Lübeck, Germany
| | - S. Stock
- Campus Lübeck, Klinik für Herz- und thorakale Gefäßchirurgie, Universitätsklinikum Schleswig-Holstein, Lübeck, Germany
| | - H. Sievers
- Campus Lübeck, Klinik für Herz- und thorakale Gefäßchirurgie, Universitätsklinikum Schleswig-Holstein, Lübeck, Germany
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20
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Stock S, Sievers H, Bucsky B, Richardt D, Klotz S. Minimally Invasive Aortic Valve Replacement: Is It Safe in Surgical Training? Thorac Cardiovasc Surg 2018. [DOI: 10.1055/s-0038-1628018] [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. Stock
- Department of Cardiac and Thoacic Vascular Surgery, University of Luebeck, Luebeck, Germany
| | - H. Sievers
- Department of Cardiac and Thoacic Vascular Surgery, University of Luebeck, Luebeck, Germany
| | - B. Bucsky
- Department of Cardiac and Thoacic Vascular Surgery, University of Luebeck, Luebeck, Germany
| | - D. Richardt
- Department of Cardiac and Thoacic Vascular Surgery, University of Luebeck, Luebeck, Germany
| | - S. Klotz
- Department of Cardiac and Thoacic Vascular Surgery, University of Luebeck, Luebeck, Germany
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21
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Charitos E, Stock S, Stierle U, Klotz S, Diwoky M, Richardt D, Sievers H. Factors Influencing the Decision Process to Replace the Ascending Aorta in Patients with Bicuspid Aortic Valves: Insights from 1693 Patients. Thorac Cardiovasc Surg 2018. [DOI: 10.1055/s-0038-1627852] [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)
- E. Charitos
- Klinik für Herzchirurgie, UK Halle, Halle (Saale), Germany
| | - S. Stock
- Klinik für Herzchirurgie, Lübeck, Germany
| | - U. Stierle
- Klinik für Herzchirurgie, Lübeck, Germany
| | - S. Klotz
- Klinik für Herzchirurgie, Lübeck, Germany
| | - M. Diwoky
- Klinik für Herzchirurgie, Lübeck, Germany
| | | | - H. Sievers
- Klinik für Herzchirurgie, Lübeck, Germany
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22
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Pipolo S, Salanne M, Ferlat G, Klotz S, Saitta AM, Pietrucci F. Navigating at Will on the Water Phase Diagram. Phys Rev Lett 2017; 119:245701. [PMID: 29286747 DOI: 10.1103/physrevlett.119.245701] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Indexed: 06/07/2023]
Abstract
Despite the simplicity of its molecular unit, water is a challenging system because of its uniquely rich polymorphism and predicted but yet unconfirmed features. Introducing a novel space of generalized coordinates that capture changes in the topology of the interatomic network, we are able to systematically track transitions among liquid, amorphous, and crystalline forms throughout the whole phase diagram of water, including the nucleation of crystals above and below the melting point. Our approach, based on molecular dynamics and enhanced sampling or free energy calculation techniques, is not specific to water and could be applied to very different structural phase transitions, paving the way towards the prediction of kinetic routes connecting polymorphic structures in a range of materials.
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Affiliation(s)
- S Pipolo
- Sorbonne Universités, UPMC Université Paris 06, CNRS UMR 7590, IRD UMR 206, MNHN, IMPMC, F-75005 Paris, France
| | - M Salanne
- Sorbonne Universités, UPMC Université Paris 06, CNRS, Laboratoire PHENIX, F-75005 Paris, France
| | - G Ferlat
- Sorbonne Universités, UPMC Université Paris 06, CNRS UMR 7590, IRD UMR 206, MNHN, IMPMC, F-75005 Paris, France
| | - S Klotz
- Sorbonne Universités, UPMC Université Paris 06, CNRS UMR 7590, IRD UMR 206, MNHN, IMPMC, F-75005 Paris, France
| | - A M Saitta
- Sorbonne Universités, UPMC Université Paris 06, CNRS UMR 7590, IRD UMR 206, MNHN, IMPMC, F-75005 Paris, France
| | - F Pietrucci
- Sorbonne Universités, UPMC Université Paris 06, CNRS UMR 7590, IRD UMR 206, MNHN, IMPMC, F-75005 Paris, France
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23
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Jobs A, Stiermaier T, Klotz S, Eitel I. [Antiplatelet or anticoagulative strategies after surgical/interventional valve treatment]. Herz 2017; 43:26-33. [PMID: 29147971 DOI: 10.1007/s00059-017-4646-2] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
At the end of August 2017 the European Society of Cardiology (ESC) and the European Association for Cardio-Thoracic Surgery (EACTS) published new joint guidelines for the treatment of valvular heart disease. These guidelines incorporate the scientific progress since the last version of the guidelines published in 2012. This article reviews current guideline recommendations for antiplatelet and anticoagulative therapy after surgical/interventional treatment of the aortic and mitral valves and discusses the underlying scientific evidence.
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Affiliation(s)
- A Jobs
- Medizinische Klinik II, Universitäres Herzzentrum Lübeck, Universitätsklinikum Schleswig-Holstein, Ratzeburger Allee 160, 23538, Lübeck, Deutschland
| | - T Stiermaier
- Medizinische Klinik II, Universitäres Herzzentrum Lübeck, Universitätsklinikum Schleswig-Holstein, Ratzeburger Allee 160, 23538, Lübeck, Deutschland
| | - S Klotz
- Klinik für Herz- und thorakale Gefäßchirurgie, Universitäres Herzzentrum Lübeck, Universitätsklinikum Schleswig-Holstein, Lübeck, Deutschland
| | - I Eitel
- Medizinische Klinik II, Universitäres Herzzentrum Lübeck, Universitätsklinikum Schleswig-Holstein, Ratzeburger Allee 160, 23538, Lübeck, Deutschland.
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24
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Zimmer F, Klotz S, Hoeger S, Yard BA, Krämer BK, Schad LR, Zöllner FG. Quantitative arterial spin labelling perfusion measurements in rat models of renal transplantation and acute kidney injury at 3T. Z Med Phys 2017; 27:39-48. [DOI: 10.1016/j.zemedi.2016.02.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Revised: 02/11/2016] [Accepted: 02/22/2016] [Indexed: 10/22/2022]
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25
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Klotz S, Bucsky S, Radzewitz S, Karluss A, Sievers H. Minimal-Invasive versus Sternotomy for LVAD Destination Therapy in Elective Patients. Thorac Cardiovasc Surg 2017. [DOI: 10.1055/s-0037-1598829] [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)
- S. Klotz
- Universitätsklinikum Schleswig-Holstein, Campus Lübeck, Klinik für Herz- und thorakale Gefäßchirurgie, Lübeck, Germany
| | - S. Bucsky
- Universitätsklinikum Schleswig-Holstein, Campus Lübeck, Klinik für Herz- und thorakale Gefäßchirurgie, Lübeck, Germany
| | - S. Radzewitz
- Universitätsklinikum Schleswig-Holstein, Campus Lübeck, Klinik für Herz- und thorakale Gefäßchirurgie, Lübeck, Germany
| | - A. Karluss
- Universitätsklinikum Schleswig-Holstein, Campus Lübeck, Klinik für Herz- und thorakale Gefäßchirurgie, Lübeck, Germany
| | - H.H. Sievers
- Universitätsklinikum Schleswig-Holstein, Campus Lübeck, Klinik für Herz- und thorakale Gefäßchirurgie, Lübeck, Germany
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26
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Klotz S, Kurz T, Richardt D, Thiele H, Sievers H. Transcatheter Aortic Valve Implantation (TAVI) in Left Ventricular Assist Device (LVAD) Patients with Aortic Valve Insufficiency: A Word of Caution. Thorac Cardiovasc Surg 2017. [DOI: 10.1055/s-0037-1598949] [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)
- S. Klotz
- Universitätsklinikum Schleswig-Holstein, Campus Lübeck, Klinik für Herz- und thorakale Gefäßchirurgie, Lübeck, Germany
| | - T. Kurz
- Universitätsklinikum Schleswig-Holstein, Campus Lübeck, Med. Klinik II, Lübeck, Germany
| | - D. Richardt
- Universitätsklinikum Schleswig-Holstein, Campus Lübeck, Klinik für Herz- und thorakale Gefäßchirurgie, Lübeck, Germany
| | - H. Thiele
- Universitätsklinikum Schleswig-Holstein, Campus Lübeck, Med. Klinik II, Lübeck, Germany
| | - H.H. Sievers
- Universitätsklinikum Schleswig-Holstein, Campus Lübeck, Klinik für Herz- und thorakale Gefäßchirurgie, Lübeck, Germany
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27
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Ludl AA, Bove LE, Corradini D, Saitta AM, Salanne M, Bull CL, Klotz S. Probing ice VII crystallization from amorphous NaCl–D2O solutions at gigapascal pressures. Phys Chem Chem Phys 2017; 19:1875-1883. [DOI: 10.1039/c6cp07340a] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The high density amorphous solution NaCl·10.2D2O crystallises at 260 K as almost pure ice VII during annealing at gigapascal pressures.
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Affiliation(s)
- A.-A. Ludl
- Sorbonne Universités, UPMC Univ. Paris 06
- Paris
- France
- Departament d'FMC
- Universitat de Barcelona
| | - L. E. Bove
- Sorbonne Universités, UPMC Univ. Paris 06
- Paris
- France
- EPSL
- Institute of Condensed Matter Physics
| | - D. Corradini
- Sorbonne Universités
- UPMC Univ. Paris 06
- CNRS UMR 8234
- Paris
- France
| | - A. M. Saitta
- Sorbonne Universités, UPMC Univ. Paris 06
- Paris
- France
| | - M. Salanne
- Sorbonne Universités
- UPMC Univ. Paris 06
- CNRS UMR 8234
- Paris
- France
| | - C. L. Bull
- ISIS Facility
- STFC Rutherford Appleton Laboratory
- Harwell Science & Innovation Campus, Harwell Oxford
- Oxon, OX11 0QX
- UK
| | - S. Klotz
- Sorbonne Universités, UPMC Univ. Paris 06
- Paris
- France
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28
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Pretze M, Pallavi P, Roscher M, Klotz S, Caballero J, Binzen U, Greffrath W, Treede RD, Harmsen MC, Hafner M, Yard B, Wängler C, Wängler B. Radiofluorinated N-Octanoyl Dopamine ([ 18F]F-NOD) as a Tool To Study Tissue Distribution and Elimination of NOD in Vitro and in Vivo. J Med Chem 2016; 59:9855-9865. [PMID: 27731639 DOI: 10.1021/acs.jmedchem.6b01191] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
To mitigate pretransplantation injury in organs of potential donors, N-octanoyl dopamine (NOD) treatment might be considered as it does not affect hemodynamic parameters in braindead (BD) donors. To better assess optimal NOD concentrations for donor treatment, we report on the fast and facile radiofluorination of the NOD-derivative [18F]F-NOD [18F]5 for in vivo assessment of NOD's elimination kinetics by means of PET imaging. [18F]5 was synthesized in reproducibly high radiochemical yields and purity (>98%) as well as high specific activities (>20 GBq/μmol). Stability tests showed no decomposition of [18F]5 over a period of 120 min in rat plasma. In vitro, low cell association was found for [18F]5, indicating no active transport mechanism into cells. In vivo, [18F]5 exhibited a fast blood clearance and a predominant hepatobiliary elimination. As these data suggest that also NOD might be cleared fast, further pharmacokinetic evaluation is warranted.
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Affiliation(s)
| | - Prama Pallavi
- Institute for Molecular and Cellular Biology, Mannheim University of Applied Sciences , Mannheim 68163, Germany
| | | | | | - Julio Caballero
- Center for Bioinformatics and Molecular Simulations, Faculty of Engineering in Bioinformatics, Universidad de Talca , Talca 07101, Chile
| | | | | | | | - Martin C Harmsen
- University of Groningen , University Medical Center Groningen, Department of Pathology and Medical Biology, Groningen 9713 GZ, The Netherlands
| | - Mathias Hafner
- Institute for Molecular and Cellular Biology, Mannheim University of Applied Sciences , Mannheim 68163, Germany
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Klotz S, Komatsu K, Pietrucci F, Kagi H, Ludl AA, Machida S, Hattori T, Sano-Furukawa A, Bove LE. Ice VII from aqueous salt solutions: From a glass to a crystal with broken H-bonds. Sci Rep 2016; 6:32040. [PMID: 27562476 PMCID: PMC5000010 DOI: 10.1038/srep32040] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2016] [Accepted: 07/26/2016] [Indexed: 11/16/2022] Open
Abstract
It has been known for decades that certain aqueous salt solutions of LiCl and LiBr readily form glasses when cooled to below ≈160 K. This fact has recently been exploited to produce a « salty » high-pressure ice form: When the glass is compressed at low temperatures to pressures higher than 4 GPa and subsequently warmed, it crystallizes into ice VII with the ionic species trapped inside the ice lattice. Here we report the extreme limit of salt incorporation into ice VII, using high pressure neutron diffraction and molecular dynamics simulations. We show that high-pressure crystallisation of aqueous solutions of LiCl∙RH2O and LiBr∙RH2O with R = 5.6 leads to solids with strongly expanded volume, a destruction of the hydrogen-bond network with an isotropic distribution of water-dipole moments, as well as a crystal-to-amorphous transition on decompression. This highly unusual behaviour constitutes an interesting pathway from a glass to a crystal where translational periodicity is restored but the rotational degrees of freedom remaining completely random.
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Affiliation(s)
- S Klotz
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, CNRS UMR 7590, Université Pierre-et-Marie-Curie, F-75252 Paris, France
| | - K Komatsu
- Geochemical Research Center, Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
| | - F Pietrucci
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, CNRS UMR 7590, Université Pierre-et-Marie-Curie, F-75252 Paris, France
| | - H Kagi
- Geochemical Research Center, Graduate School of Science, The University of Tokyo, Tokyo 113-0033, Japan
| | - A-A Ludl
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, CNRS UMR 7590, Université Pierre-et-Marie-Curie, F-75252 Paris, France
| | - S Machida
- CROSS-Tokai, Research Centre for Neutron Science and Technology, 162-1 Shirakata, Tokai, Ibaraki 319-1106, Japan
| | - T Hattori
- J-PARC Center, Japan Atomic Energy Agency, Tokai, Naka, Ibaraki 319-1195, Japan
| | - A Sano-Furukawa
- J-PARC Center, Japan Atomic Energy Agency, Tokai, Naka, Ibaraki 319-1195, Japan
| | - L E Bove
- Institut de Minéralogie, de Physique des Matériaux et de Cosmochimie, CNRS UMR 7590, Université Pierre-et-Marie-Curie, F-75252 Paris, France.,Institute of Condensed Matter Physics, Ecole Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
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Richardt D, Klotz S, Petersen M, Bucsky B, Hanke T, Stierle U, Sievers HH. Long Term Survival after Aortic Valve-sparing (David and Yacoub) Operation. Thorac Cardiovasc Surg 2016. [DOI: 10.1055/s-0036-1571612] [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: 10/22/2022]
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Sendek A, Herz K, Auge H, Hensen I, Klotz S. Performance and responses to competition in two congeneric annual species: does seed heteromorphism matter? Plant Biol (Stuttg) 2015. [PMID: 26206119 DOI: 10.1111/plb.12372] [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] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
Variations in seed characteristics observed in heteromorphic species may affect various stages of their life cycles, e.g. seed dormancy, germination characteristics or even adult plant performance. Highly specialised seed morphs - described as colonisers and maintainers - exhibit a trade-off between colonisation capacity and competitive traits. The performance of distinct seed morph progeny under competitive conditions, and especially in multi-species arrangements, had previously not been given much attention. In this study, we compared performance and response to competition among distinct seed morph progenies in two congeneric, co-occurring species: the invasive Bidens frondosa and the non-invasive Bidens tripartita. We hypothesised that maintainer seed morphs of both species would perform better under increased plant densities and within inter-morphic mixtures, while coloniser morphs would show stronger responses to increased densities and perform relatively poorly in inter-morphic mixtures. We conducted a growth trial and a greenhouse experiment, which revealed that seed morph progeny differed significantly in plant height when grown without competition, while under competitive conditions such differences became less apparent. The observed pattern was more strongly pronounced in B. frondosa, which showed a general predominance in stature and biomass over its non-invasive congener. Although seed morphs performed equally well under competitive conditions, increased plant height and more rapid germination can favour the maintainer seed morph on sites where vegetation is already present.
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Affiliation(s)
- A Sendek
- Department of Community Ecology, UFZ- Helmholtz Centre for Environmental Research, Halle, Germany
- Institute of Biology/Geobotany and Botanical Garden, Martin Luther University Halle-Wittenberg, Halle, Germany
| | - K Herz
- Institute of Biology/Geobotany and Botanical Garden, Martin Luther University Halle-Wittenberg, Halle, Germany
| | - H Auge
- Department of Community Ecology, UFZ- Helmholtz Centre for Environmental Research, Halle, Germany
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
| | - I Hensen
- Institute of Biology/Geobotany and Botanical Garden, Martin Luther University Halle-Wittenberg, Halle, Germany
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
| | - S Klotz
- Department of Community Ecology, UFZ- Helmholtz Centre for Environmental Research, Halle, Germany
- German Centre for Integrative Biodiversity Research (iDiv) Halle-Jena-Leipzig, Leipzig, Germany
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Klotz S, Pallavi P, Tsagogiorgas C, Zimmer F, Zöllner FG, Binzen U, Greffrath W, Treede RD, Walter J, Harmsen MC, Krämer BK, Hafner M, Yard BA, Hoeger S. N-octanoyl dopamine treatment exerts renoprotective properties in acute kidney injury but not in renal allograft recipients. Nephrol Dial Transplant 2015; 31:564-73. [DOI: 10.1093/ndt/gfv363] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Accepted: 09/17/2015] [Indexed: 12/26/2022] Open
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Abstract
Urea, like many network forming compounds, has long been known to form inclusion (guest-host) compounds. Unlike other network formers like water, urea is not known to form such inclusion compounds with simple molecules like hydrogen. Such compounds if they existed would be of interest both for the fundamental insight they provide into molecular bonding and as potential gas storage systems. Urea has been proposed as a potential hydrogen storage material [T. A. Strobel et al., Chem. Phys. Lett. 478, 97 (2009)]. Here, we report the results of high-pressure neutron diffraction studies of urea and D2 mixtures that indicate no inclusion compound forms up to 3.7 GPa.
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Affiliation(s)
- M Donnelly
- Centre for Science at Extreme Conditions and School of Physics and Astronomy, The University of Edinburgh, Erskine Williamson Building, Peter Guthrie Tait Road, The King's Buildings, Edinburgh EH9 3FD, United Kingdom
| | - C L Bull
- ISIS, Rutherford Appleton Laboratory, Oxford Harwell, Didcot OX11 0QX, United Kingdom
| | - R J Husband
- Centre for Science at Extreme Conditions and School of Physics and Astronomy, The University of Edinburgh, Erskine Williamson Building, Peter Guthrie Tait Road, The King's Buildings, Edinburgh EH9 3FD, United Kingdom
| | - A D Frantzana
- Centre for Science at Extreme Conditions and School of Physics and Astronomy, The University of Edinburgh, Erskine Williamson Building, Peter Guthrie Tait Road, The King's Buildings, Edinburgh EH9 3FD, United Kingdom
| | - S Klotz
- IMPMC, CNRS UMR 7590, Université P & M Curie, 4 Place Jussieu, 75252 Paris, France
| | - J S Loveday
- Centre for Science at Extreme Conditions and School of Physics and Astronomy, The University of Edinburgh, Erskine Williamson Building, Peter Guthrie Tait Road, The King's Buildings, Edinburgh EH9 3FD, United Kingdom
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Ludl AA, Bove LE, Saitta AM, Salanne M, Hansen TC, Bull CL, Gaal R, Klotz S. Structural characterization of eutectic aqueous NaCl solutions under variable temperature and pressure conditions. Phys Chem Chem Phys 2015; 17:14054-63. [PMID: 25955540 DOI: 10.1039/c5cp00224a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The structure of amorphous NaCl solutions produced by fast quenching is studied as a function of pressure, up to 4 GPa, by combined neutron diffraction experiments and classical molecular dynamics simulations. Similarly to LiCl solutions the system amorphizes at ambient pressure in a dense phase structurally similar to the e-HDA phase in pure water. The measurement of the static structure factor as a function of pressure allowed us to validate a new polarizable force field developed by Tazi et al., 2012, never tested under non-ambient conditions. We infer from simulations that the hydration shells of Na(+) cations form well defined octahedra composed of both H2O molecules and Cl(-) anions at low pressure. These octahedra are gradually broken by the seventh neighbour moving into the shell of first neighbours yielding an irregular geometry. In contrast to LiCl solutions and pure water, the system does not show a polyamorphic transition under pressure. This confirms that the existence of polyamorphism relies on the tetrahedral structure of water molecules, which is broken here.
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Affiliation(s)
- A-A Ludl
- Sorbonne Universités, UPMC Univ Paris 06, CNRS, UMR 7590, IMPMC, F-75005, Paris, France.
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Charitos E, Stierle U, Klotz S, Hanke T, Sievers HH. A Decision Tree for the Replacement of the Ascending Aorta in Patients Undergoing Aortic Valve Surgery: A Single Center Experience in 1362 Patients. Thorac Cardiovasc Surg 2015. [DOI: 10.1055/s-0035-1544423] [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: 10/20/2022]
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Klotz S, Meyer-Saraei R, Frydrychowicz A, Scharfschwerdt M, Sievers H. A New Method to Replace the Left Ventricle with an Assist Device - 4-Dimensional Flow Visualization -. Thorac Cardiovasc Surg 2015. [DOI: 10.1055/s-0035-1544269] [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: 10/24/2022]
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Klotz S, Tsvelodub S, Hanke T, Petersen M, Stiele U, Sievers H. Outcome of Mitral Valve Surgery in Patients with Chronic Mitral Regurgitation and Low Ejection Fraction: Repair or Replacement? Thorac Cardiovasc Surg 2015. [DOI: 10.1055/s-0035-1544319] [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: 10/24/2022]
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38
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Klotz S, Eggers S, Sievers H. Measurement of Quality of Life with LVAD Destination Therapy. Thorac Cardiovasc Surg 2015. [DOI: 10.1055/s-0035-1544433] [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: 10/20/2022]
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39
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Klotz S, Hanke T, Petersen M, Sievers H. 292 * PERIPHERAL OR CENTRAL CANNULATION IN ACUTE TYPE A DISSECTION: DOES IT REALLY MATTER? Interact Cardiovasc Thorac Surg 2014. [DOI: 10.1093/icvts/ivu276.292] [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: 11/13/2022] Open
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40
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Klotz S, Charitos E, Stierle U, Sievers H. Hospital Readmission with LVAD Destination Therapy. J Heart Lung Transplant 2014. [DOI: 10.1016/j.healun.2014.01.541] [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] Open
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41
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Gottardi W, Klotz S, Nagl M. Superior bactericidal activity of N-bromine compounds compared to their N-chlorine analogues can be reversed under protein load. J Appl Microbiol 2014; 116:1427-37. [PMID: 24905215 DOI: 10.1111/jam.12474] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [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: 11/13/2013] [Revised: 01/08/2014] [Accepted: 02/11/2014] [Indexed: 12/01/2022]
Abstract
AIMS To investigate and compare the bactericidal activity (BA) of active bromine and chlorine compounds in the absence and presence of protein load. METHODS AND RESULTS Quantitative killing tests against Escherichia coli and Staphylococcus aureus were performed both in the absence and in the presence of peptone with pairs of isosteric active chlorine and bromine compounds: hypochlorous and hypobromous acid (HOCl and HOBr), dichloro- and dibromoisocyanuric acid, chlorantine and bromantine (1,3-dibromo- and 1,3 dichloro-5,5-dimethylhydantoine), chloramine T and bromamine T (N-chloro- and N-bromo-4-methylbenzenesulphonamide sodium), and N-chloro- and N-bromotaurine sodium. To classify the bactericidal activities on a quantitative basis, an empirical coefficient named specific bactericidal activity (SBA), founded on the parameters of killing curves, was defined: SBA= mean log reductions/(mean exposure times x concentration) [mmol 1(-1) min (-1)]. In the absence of peptone, tests with washed micro-organisms revealed a throughout higher BA of bromine compounds with only slight differences between single substances. This was in contrast to chlorine compounds, whose killing times differed by a factor of more than four decimal powers. As a consequence, also the isosteric pairs showed according differences. In the presence of peptone, however, bromine compounds showed an increased loss of BA, which partly caused a reversal of efficacy within isosteric pairs. CONCLUSIONS In medical practice, weakly oxidizing active chlorine compounds like chloramines have the highest potential as topical anti-infectives in the presence of proteinaceous material (mucous membranes, open wounds). Active bromine compounds, on the other hand, have their chance at insensitive body regions with low organic matter, for example skin surfaces. SIGNIFICANCE AND IMPACT OF THE STUDY The expected protein load is one of the most important parameters for selection of a suited active halogen compound.
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Affiliation(s)
- W Gottardi
- Division of Hygiene and Medical Microbiology, Department of Hygiene, Microbiology and Social Medicine, Innsbruck Medical University, Innsbruck, Austria
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Zöllner FG, Zimmer F, Klotz S, Hoeger S, Schad LR. Functional imaging of acute kidney injury at 3 Tesla: investigating multiple parameters using DCE-MRI and a two-compartment filtration model. Z Med Phys 2014; 25:58-65. [PMID: 24629306 DOI: 10.1016/j.zemedi.2014.01.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [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: 09/11/2013] [Revised: 01/10/2014] [Accepted: 01/10/2014] [Indexed: 11/28/2022]
Abstract
OBJECT To investigate how MR-based parameters reflect functional changes in kidneys with acute kidney injury (AKI) using dynamic contrast enhanced MRI and a two-compartment renal filtration model. MATERIALS AND METHODS MRI data of eight male Lewis rats were analyzed retrospectively. Five animals were subjected to AKI, three native rats served as control. All animals underwent perfusion imaging by dynamic contrast-enhanced MRI. Renal blood volume, glomerular filtration rate (GFR) as well as plasma and tubular mean transit times were estimated from regions-of-interest drawn in the renal cortex. Differences between healthy kidneys and kidneys subjected to AKI were analyzed using a paired t-test. RESULTS Significant differences between ischemic and healthy kidneys could only be detected for the glomerular filtration rate. For all other calculated parameters, differences were present, however not significant. In rats with AKI, average single kidney GFR was 0.66 ± 0.37 ml/min for contralateral and 0.26 ± 0.12 ml/ min for diseased kidneys (P = 0.0254). For the healthy control group, the average GFR was 0.39 ± 0.06 ml/min and 0.41 ± 0.11 ml/min, respectively. Differences between diseased kidneys of AKI rats and ipsilateral kidneys of the healthy control group were significant (P = 0.0381). CONCLUSION Significant differences of functional parameters reflecting damage of the renal tissue of kidneys with AKI compared to the contralateral, healthy kidneys could only be detected by GFR. GFR might be a useful parameter that allows for a spatially resolved detection of abnormal changes of renal tissue by AKI.
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Affiliation(s)
- Frank G Zöllner
- Computer Assisted Clinical Medicine, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany.
| | - Fabian Zimmer
- Computer Assisted Clinical Medicine, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
| | - Sarah Klotz
- Department of Medicine V, University Medical Centre Mannheim, Heidelberg University, Mannheim, Germany
| | - Simone Hoeger
- Department of Medicine V, University Medical Centre Mannheim, Heidelberg University, Mannheim, Germany
| | - Lothar R Schad
- Computer Assisted Clinical Medicine, Medical Faculty Mannheim, Heidelberg University, Mannheim, Germany
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Charitos E, Ziegler P, Stierle U, Graf B, Klotz S, Sievers HH, Hanke T. Atrial fibrillation burden estimates derived from intermittent rhythm monitoring should not be used for patient follow-up or as endpoints in clinical trials. Thorac Cardiovasc Surg 2014. [DOI: 10.1055/s-0034-1367170] [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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Charitos E, Stierle U, Karluß A, Misfeld M, Hanke T, Klotz S, Sievers HH. Aortic leaflet interventions for aortic valve repair: How much is too much? Thorac Cardiovasc Surg 2014. [DOI: 10.1055/s-0034-1367235] [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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Welp HA, Gottschalk A, Ellger B, Scherer M, Martens S, Eckardt L, Klotz S, Mönnig G. Driving with a drive-line: an evidence based approach of driving restriction after implantation of left ventricular assist device in end stage heart failure. Thorac Cardiovasc Surg 2014. [DOI: 10.1055/s-0034-1367101] [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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Sievers HH, Stierle U, Hanke T, Klotz S, Schmidtke C, Charitos E. Phenotype of bicuspid aortic valve and management of the ascending aorta in 1362 patients. Thorac Cardiovasc Surg 2014. [DOI: 10.1055/s-0034-1367233] [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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Bove LE, Klotz S, Strässle T, Koza M, Teixeira J, Saitta AM. Translational and rotational diffusion in water in the Gigapascal range. Phys Rev Lett 2013; 111:185901. [PMID: 24237539 DOI: 10.1103/physrevlett.111.185901] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Indexed: 06/02/2023]
Abstract
First measurements of the self-dynamics of liquid water in the GPa range are reported. The GPa range has here become accessible through a new setup for the Paris-Edinburgh press specially conceived for quasielastic neutron scattering studies. A direct measurement of both the translational and rotational diffusion coefficients of water along the 400 K isotherm up to 3 GPa, corresponding to the melting point of ice VII, is provided and compared with molecular dynamics simulations. The translational diffusion is observed to strongly decrease with pressure, though its variation slows down for pressures higher than 1 GPa and decouples from that of the shear viscosity. The rotational diffusion turns out to be insensitive to pressure. Through comparison with structural data and molecular dynamics simulations, we show that this is a consequence of the rigidity of the first neighbors shell and of the invariance of the number of hydrogen bonds of a water molecule under high pressure. These results show the inadequacy of the Stokes-Einstein-Debye equations to predict the self-diffusive behavior of water at high temperature and high pressure, and challenge the usual description of hot dense water behaving as a simple liquid.
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Affiliation(s)
- L E Bove
- IMPMC, CNRS-UMR 7590, Université Pierre & Marie Curie, 75252 Paris, France and Ecole Polytech Fed Lausanne, Inst Condensed Matter Phys, EPSL, CH-1015 Lausanne, Switzerland
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Charitos E, Stierle U, Hanke T, Klotz S, Sievers H. 222 * THE FATE OF BICUSPID VALVE AORTOPATHY AFTER AORTIC VALVE REPLACEMENT. Interact Cardiovasc Thorac Surg 2013. [DOI: 10.1093/icvts/ivt372.222] [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: 11/13/2022] Open
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49
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Pawlus S, Klotz S, Paluch M. Effect of compression on the relationship between viscosity and dielectric relaxation time in hydrogen-bonded primary alcohols. Phys Rev Lett 2013; 110:173004. [PMID: 23679720 DOI: 10.1103/physrevlett.110.173004] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2012] [Indexed: 06/02/2023]
Abstract
High pressure viscosity and dielectric measurements were carried out on two monohydroxy alcohols, 2-ethyl-1-hexanol and 5-methyl-2-hexanol, at room temperature. Analysis of the dielectric relaxation times versus viscosity revealed the breakdown of the Einstein-Debye relation above some characteristic pressure. The failure of the Einstein-Debye relation is a manifestation of pressure induced changes of supramolecular hydrogen bonded structures which occur in these liquids.
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Affiliation(s)
- S Pawlus
- Institute of Physics, University of Silesia, Uniwersytecka 4, 40-007 Katowice, Poland
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Klotz S, Putman L, Sievers HH. Easy and fast sternal closure system for severe adipositas. Thorac Cardiovasc Surg 2013. [DOI: 10.1055/s-0032-1332483] [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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