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Freund A, Boemers T, Klein T, Marathovouniotis N, Demian M. [Monteggia lesions and equivalent lesions in children]. Unfallchirurgie (Heidelb) 2023; 126:880-885. [PMID: 36048176 DOI: 10.1007/s00113-022-01235-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 05/02/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Missed Monteggia lesions results in chronic luxation and deficits in the range of motion. The overall therapeutic goal is a quick and stable anatomical repositioning of the lesion. The prognosis of Monteggia lesions in comparison to its equivalents is better, especially with early diagnosis. OBJECTIVE Comparison of the types of lesion, treatment modalities, hospitalization, immobilization, movement deficits, perioperative complications and outcome. MATERIAL AND METHODS Retrospective study of 62 patients treated with acute Monteggia lesions and its equivalents during the period of 2009-2020. RESULTS 2 patients were treated with cast immobilization only, 11 with repositioning under general anesthesia, 39 with intramedullary nailing and 10 with screw osteosynthesis. The average observation period was 4.1 months. Patients with cast immobilization needed only a short hospitalization (2 days), patients with repositioning or osteosynthesis had longer hospitalization (3.4 or 4.3 days, respectively). Deficits of the range of motion did not appear in simple cast immobilization or intramedullary nailing without reduction; however, patients with closed reduction or screw osteosynthesis showed some degree of deficits (9% and 40%, respectively). Monteggia lesions needed shorter hospitalization than their equivalents (3.7 vs. 4.5 days) and had less deficits in the range of motion (7% vs. 21%). CONCLUSION Most patients were treated with osteosynthesis (79%). Patients with Monteggia lesions had a better outcome than patients with equivalent lesions.
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Affiliation(s)
- A Freund
- Klinik für Kinder- und Jugendchirurgie und Kinderurologie, Kliniken der Stadt Köln gGmbH - Kinderkrankenhaus, Amsterdamer Str. 59, 50735, Köln, Deutschland.
| | - T Boemers
- Klinik für Kinder- und Jugendchirurgie und Kinderurologie, Kliniken der Stadt Köln gGmbH - Kinderkrankenhaus, Amsterdamer Str. 59, 50735, Köln, Deutschland
| | - T Klein
- Klinik für Kinder- und Jugendchirurgie und Kinderurologie, Kliniken der Stadt Köln gGmbH - Kinderkrankenhaus, Amsterdamer Str. 59, 50735, Köln, Deutschland
| | - N Marathovouniotis
- Klinik für Kinder- und Jugendchirurgie und Kinderurologie, Kliniken der Stadt Köln gGmbH - Kinderkrankenhaus, Amsterdamer Str. 59, 50735, Köln, Deutschland
| | - M Demian
- Klinik für Kinder- und Jugendchirurgie und Kinderurologie, Kliniken der Stadt Köln gGmbH - Kinderkrankenhaus, Amsterdamer Str. 59, 50735, Köln, Deutschland
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Petrik P, Petek-Petrik A, Kurjak D, Mukarram M, Klein T, Gömöry D, Střelcová K, Frýdl J, Konôpková A. Interannual adjustments in stomatal and leaf morphological traits of European beech (Fagus sylvatica L.) demonstrate its climate change acclimation potential. Plant Biol (Stuttg) 2022; 24:1287-1296. [PMID: 35238138 DOI: 10.1111/plb.13401] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 01/27/2022] [Indexed: 06/14/2023]
Abstract
The current projections of climate change might exceed the ability of European forest trees to adapt to upcoming environmental conditions. However, stomatal and leaf morphological traits could greatly influence the acclimation potential of forest tree species subjected to global warming, including the single most important forestry species in Europe, European beech. We analysed stomatal (guard cell length, stomatal density and potential conductance index) and leaf (leaf area, leaf dry weight and leaf mass per area) morphological traits of ten provenances from two provenance trials with contrasting climates between 2016 and 2020. The impact of meteorological conditions of the current and preceding year on stomatal and leaf traits was tested by linear and quadratic regressions. Ecodistance was used to capture the impact of adaptation after the transfer of provenances to new environments. Interactions of trial-provenance and trial-year factors were significant for all measured traits. Guard cell length was lowest and stomatal density was highest across beech provenances in the driest year, 2018. Adaptation was also reflected in a significant relationship between aridity ecodistance and measured traits. Moreover, the meteorological conditions of the preceding year affected the interannual variability of stomatal and leaf traits more than the meteorological conditions of the spring of the current year, suggesting the existence of plant stress memory. High intraspecific variability of stomatal and leaf traits controlled by the interaction of adaptation, acclimation and plant memory suggests a high acclimation potential of European beech provenances under future conditions of global climate change.
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Affiliation(s)
- P Petrik
- Global Change Research Institute, Czech Academy of Sciences, Brno, Czech Republic
| | - A Petek-Petrik
- Department of Vegetation Ecology, Institute of Botany CAS, Brno, Czech Republic
| | - D Kurjak
- Faculty of Forestry, Technical University in Zvolen, Zvolen, Slovakia
| | - M Mukarram
- Faculty of Forestry, Technical University in Zvolen, Zvolen, Slovakia
- Advance Plant Physiology Section, Department of Botany, Aligarh Muslim University, Aligarh, India
| | - T Klein
- Department of Plant and Environmental Sciences, Weizmann Institute of Science, Rehovot, Israel
| | - D Gömöry
- Faculty of Forestry, Technical University in Zvolen, Zvolen, Slovakia
| | - K Střelcová
- Faculty of Forestry, Technical University in Zvolen, Zvolen, Slovakia
| | - J Frýdl
- Forestry and Game Management Research Institute, Jíloviště, Czech Republic
| | - A Konôpková
- Faculty of Forestry, Technical University in Zvolen, Zvolen, Slovakia
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Imajo S, Matsuyama N, Nomura T, Kihara T, Nakamura S, Marcenat C, Klein T, Seyfarth G, Zhong C, Kageyama H, Kindo K, Momoi T, Kohama Y. Magnetically Hidden State on the Ground Floor of the Magnetic Devil's Staircase. Phys Rev Lett 2022; 129:147201. [PMID: 36240417 DOI: 10.1103/physrevlett.129.147201] [Citation(s) in RCA: 3] [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: 03/14/2022] [Revised: 06/20/2022] [Accepted: 09/08/2022] [Indexed: 06/16/2023]
Abstract
We investigated the low-temperature and high-field thermodynamic and ultrasonic properties of SrCu_{2}(BO_{3})_{2}, which exhibits various plateaux in its magnetization curve above 27 T, called a magnetic Devil's staircase. The results of the present study confirm that magnetic crystallization, the first step of the staircase, occurs above 27 T as a first-order transition accompanied by a sharp singularity in heat capacity C_{p} and a kink in the elastic constant. In addition, we observe a thermodynamic anomaly at lower fields around 26 T, which has not been previously detected by any magnetic probes. At low temperatures, this magnetically hidden state has a large entropy and does not exhibit Schottky-type gapped behavior, which suggests the existence of low-energy collective excitations. Based on our observations and theoretical predictions, we propose that magnetic quadrupoles form a spin-nematic state around 26 T as a hidden state on the ground floor of the magnetic Devil's staircase.
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Affiliation(s)
- S Imajo
- Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - N Matsuyama
- Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - T Nomura
- Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - T Kihara
- Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
| | - S Nakamura
- Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
| | - C Marcenat
- Université Grenoble Alpes, CEA, Grenoble INP, IRIG, PHELIQS, 38000 Grenoble, France
| | - T Klein
- Université Grenoble Alpes, CNRS, Grenoble INP, Institut Néel, F-38000 Grenoble, France
| | - G Seyfarth
- LNCMI-EMFL, CNRS, Université Grenoble Alpes, INSA-T, UPS, F-38042 Grenoble, France
| | - C Zhong
- Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - H Kageyama
- Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan
| | - K Kindo
- Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
| | - T Momoi
- Condensed Matter Theory Laboratory, RIKEN, Wako, Saitama 351-0198, Japan
- RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan
| | - Y Kohama
- Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581, Japan
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Klein T. Veränderung von Konsummustern – Erfahrungen aus der
Therapie. Suchttherapie 2022. [DOI: 10.1055/s-0042-1756063] [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] [Subscribe] [Scholar Register] [Indexed: 03/22/2023]
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Abeln V, Fomina E, Popova J, Braunsmann L, Koschate J, Möller F, Fedyay SO, Vassilieva GY, Schneider S, Strüder HK, Klein T. Chronic, acute and protocol-dependent effects of exercise on psycho-physiological health during long-term isolation and confinement. BMC Neurosci 2022; 23:41. [PMID: 35773633 PMCID: PMC9244384 DOI: 10.1186/s12868-022-00723-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [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: 03/08/2022] [Accepted: 06/13/2022] [Indexed: 12/27/2022] Open
Abstract
Exercise could prevent physical and psychological deteriorations, especially during pandemic times of lock-down scenarios and social isolation. But to meet both, the common exercise protocols require optimization based on holistic investigations and with respect to underlying processes. This study aimed to explore individual chronic and acute effects of continuous and interval running exercise on physical and cognitive performance, mood, and affect and underlying neurophysiological factors during a terrestrial simulated space mission. Six volunteers (three females) were isolated for 120 days. Accompanying exercise training consisted of a continuous and interval running protocol in a cross-over design. Incremental stage tests on a treadmill were done frequently to test physical performance. Actigraphy was used to monitor physical activity level. Cognitive performance, mood (MoodMeter®), affect (PANAS), brain-derived neurotrophic factor (BDNF), insulin-like growth factor 1 (IGF-1), vascular-endothelial growth factor (VEGF), and saliva cortisol were investigated prior to, four times during, and after isolation, pre- and post-exercise on two separate days, respectively. As a chronic effect, physical performance increased (and IGF-1 tended) in the course of isolation and training until the end of isolation. Subjective mood and affect state, as well as cognitive performance, basal BDNF and VEGF levels, were well-preserved across the intervention. No acute effects of exercise were detected, besides slower reaction time after exercise in two out of nine cognitive tests, testing sensorimotor speed and memory of complex figures. Consistently higher basal IGF-1 concentrations and faster reaction time in the psychomotor vigilance test were found for the continuous compared to the interval running protocol. The results suggest that 120 days of isolation and confinement can be undergone without cognitive and mental deteriorations. Regular, individual aerobic running training supporting physical fitness is hypothesized to play an important role in this regard. Continuous running exercise seems to trigger higher IGF-1 levels and vigilance compared to interval running. Systematic and prolonged investigations and larger sample size are required to follow up on exercise-protocol specific differences in order to optimize the exercise intervention for long-term psycho-physiological health and well-being.
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Affiliation(s)
- V Abeln
- Institute of Movement and Neurosciences, Center for Health and Integrative Physiology in Space (CHIPS), German Sport University Cologne, Am Sportpark Muengersdorf 6, 50933, Cologne, Germany.
| | - E Fomina
- Institute of Biomedical Problems (IBMP), Russian Academy of Sciences, Khoroshevskoye shosse 76A, 123007, Moscow, Russia
| | - J Popova
- Institute of Biomedical Problems (IBMP), Russian Academy of Sciences, Khoroshevskoye shosse 76A, 123007, Moscow, Russia
| | - L Braunsmann
- Institute of Movement and Neurosciences, Center for Health and Integrative Physiology in Space (CHIPS), German Sport University Cologne, Am Sportpark Muengersdorf 6, 50933, Cologne, Germany
| | - J Koschate
- Geriatric Medicine, School of Medicine and Health Sciences, Carl Von Ossietzky University Oldenburg, Ammerlaender Heerstr. 140, 26129, Oldenburg, Germany
| | - F Möller
- Department of Exercise Physiology, German Sport University Cologne, Am Sportpark Muengersdorf 6, 50933, CologneCologne, Germany
| | - S O Fedyay
- Institute of Biomedical Problems (IBMP), Russian Academy of Sciences, Khoroshevskoye shosse 76A, 123007, Moscow, Russia
| | - G Y Vassilieva
- Institute of Biomedical Problems (IBMP), Russian Academy of Sciences, Khoroshevskoye shosse 76A, 123007, Moscow, Russia
| | - S Schneider
- Institute of Movement and Neurosciences, Center for Health and Integrative Physiology in Space (CHIPS), German Sport University Cologne, Am Sportpark Muengersdorf 6, 50933, Cologne, Germany
| | - H K Strüder
- Institute of Movement and Neurosciences, Center for Health and Integrative Physiology in Space (CHIPS), German Sport University Cologne, Am Sportpark Muengersdorf 6, 50933, Cologne, Germany
| | - T Klein
- Institute of Movement and Neurosciences, Center for Health and Integrative Physiology in Space (CHIPS), German Sport University Cologne, Am Sportpark Muengersdorf 6, 50933, Cologne, Germany.,Institute of Sport Science, University of Rostock, 18057, Rostock, Germany
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Juurikka K, Dufour A, Pehkonen K, Mainoli B, Campioni Rodrigues P, Solis N, Klein T, Nyberg P, Overall CM, Salo T, Åström P. MMP8 increases tongue carcinoma cell-cell adhesion and diminishes migration via cleavage of anti-adhesive FXYD5. Oncogenesis 2021; 10:44. [PMID: 34059618 PMCID: PMC8167110 DOI: 10.1038/s41389-021-00334-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [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: 03/17/2021] [Revised: 05/03/2021] [Accepted: 05/14/2021] [Indexed: 12/28/2022] Open
Abstract
Matrix metalloproteinases (MMPs) modify bioactive factors via selective processing or degradation resulting in tumour-promoting or tumour-suppressive effects, such as those by MMP8 in various cancers. We mapped the substrates of MMP8 to elucidate its previously shown tumour-protective role in oral tongue squamous cell carcinoma (OTSCC). MMP8 overexpressing (+) HSC-3 cells, previously demonstrated to have reduced migration and invasion, showed enhanced cell-cell adhesion. By analysing the secretomes of MMP8 + and control cells with terminal amine isotopic labelling of substrates (TAILS) coupled with liquid chromatography and tandem mass spectrometry (LC-MS/MS), we identified 36 potential substrates of MMP8, including FXYD domain-containing ion transport regulator 5 (FXYD5). An anti-adhesive glycoprotein FXYD5 has been previously shown to predict poor survival in OTSCC. Cleavage of FXYD5 by MMP8 was confirmed using recombinant proteins. Furthermore, we detected a loss of FXYD5 levels on cell membrane of MMP8 + cells, which was rescued by inhibition of the proteolytic activity of MMP8. Silencing (si) FXYD5 increased the cell-cell adhesion of control but not that of MMP8 + cells. siFXYD5 diminished the viability and motility of HSC-3 cells independent of MMP8 and similar effects were seen in another tongue cancer cell line, SCC-25. FXYD5 is a novel substrate of MMP8 and reducing FXYD5 levels either with siRNA or cleavage by MMP8 increases cell adhesion leading to reduced motility. FXYD5 being a known prognostic factor in OTSCC, our findings strengthen its potential as a therapeutic target.
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Affiliation(s)
- K Juurikka
- Cancer and Translational Medicine Research Unit, Faculty of Medicine, University of Oulu, Oulu, Finland.,Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
| | - A Dufour
- Department of Physiology & Pharmacology, University of Calgary, Calgary, Canada.,Department of Oral Biological and Medical Sciences, Faculty of Dentistry, Centre for Blood Research, and Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, Canada
| | - K Pehkonen
- Cancer and Translational Medicine Research Unit, Faculty of Medicine, University of Oulu, Oulu, Finland.,Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
| | - B Mainoli
- Department of Physiology & Pharmacology, University of Calgary, Calgary, Canada
| | - P Campioni Rodrigues
- Cancer and Translational Medicine Research Unit, Faculty of Medicine, University of Oulu, Oulu, Finland.,Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland
| | - N Solis
- Department of Oral Biological and Medical Sciences, Faculty of Dentistry, Centre for Blood Research, and Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, Canada
| | - T Klein
- Department of Oral Biological and Medical Sciences, Faculty of Dentistry, Centre for Blood Research, and Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, Canada
| | - P Nyberg
- Cancer and Translational Medicine Research Unit, Faculty of Medicine, University of Oulu, Oulu, Finland.,Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland.,Biobank Borealis of Northern Finland, Oulu University Hospital, Oulu, Finland
| | - C M Overall
- Department of Oral Biological and Medical Sciences, Faculty of Dentistry, Centre for Blood Research, and Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, Canada
| | - T Salo
- Cancer and Translational Medicine Research Unit, Faculty of Medicine, University of Oulu, Oulu, Finland.,Medical Research Center Oulu, Oulu University Hospital and University of Oulu, Oulu, Finland.,Department of Oral and Maxillofacial Diseases, Faculty of Medicine, University of Helsinki, Helsinki, Finland.,Helsinki University Hospital, Helsinki, Finland.,Translational Immunology Research Program (TRIMM), University of Helsinki, Helsinki, Finland
| | - P Åström
- Cancer and Translational Medicine Research Unit, Faculty of Medicine, University of Oulu, Oulu, Finland. .,Department of Oral Biological and Medical Sciences, Faculty of Dentistry, Centre for Blood Research, and Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, Canada. .,Research Unit of Biomedicine, Faculty of Medicine, University of Oulu, Oulu, Finland.
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Pohle R, Marathovouniotis N, Klein T, Boemers TM. Erratum zu: Hepatoomphalozelen – eine interdisziplinäre Herausforderung. Monatsschr Kinderheilkd 2021. [DOI: 10.1007/s00112-021-01152-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Cai Z, Klein T, Geenen L, Tu L, Tian S, Van Den Bosch A, De Rijke Y, Reiss I, Boersma E, Duncker D, Boomars K, Guignabert C, Merkus D. Lower plasma melatonin levels predict worse long-term survival in pulmonary arterial hypertension. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.3815] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Exogenous melatonin has been reported to be beneficial in the treatment of pulmonary hypertension (PH) in animal models. Multiple mechanisms may be involved, with melatonin exerting anti-oxidant and anti-inflammatory effects, as well as inducing vasodilation and cardio-protection. However, endogenous levels of melatonin in treatment-naïve pulmonary arterial hypertension (PAH) patients and their clinical significance are still unknown.
Methods and results
Plasma levels of endogenous melatonin were measured by liquid chromatography-tandem mass spectrometry in treatment-naïve PAH patients (n=43) and healthy controls (n=111). Melatonin levels were higher in PAH patients when compared with controls (Median 118.9 [IQR 109.3–147.7] versus 108.0 [102.3–115.2] pM, P<0.001) (Figure 1A). The overall mortality was 26% (11/43) during a median long-term follow-up of 42 [IQR: 32–58] months. When PAH patients were stratified into 4 groups according to the quartiles of melatonin levels, the mortality from below 1st quartile to above 4th quartile was 55% (6/11), 10% (1/10), 0% (0/12), and 40% (4/10), respectively (Figure 1B). Kaplan-Meier analysis further showed that patients with melatonin levels below the 1st quartile (<109.3 pM) had a worse long-term survival than patients with melatonin levels above the 1st quartile (Mean survival times were 46 [95% CI: 30–65] versus 68 [58–77] months, Log-rank, p=0.026) (Figure 1C).
Conclusion
Endogenous melatonin levels were increased in treatment-naïve PAH patients, and lower levels of melatonin were associated with worse long-term survival in patient with PAH, however, whether exogenous melatonin supplements may be effective as a therapeutic strategy in human PAH remains to be established.
Figure 1
Funding Acknowledgement
Type of funding source: Foundation. Main funding source(s): This work was supported by the China Scholarship Council (201606230252) as well as the Netherlands CardioVascular Research Initiative: an initiative with support of the Dutch Heart Foundation (CVON2014-11, RECONNECT), and German Center for Cardiovascular Research (DZHK81Z0600207). Instrumentation support was received from AB Sciex, ltd. for LC-MS/MS analyses performed in this study.
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Affiliation(s)
- Z Cai
- Erasmus Medical Center, Cardiology, Rotterdam, Netherlands (The)
| | - T Klein
- Erasmus Medical Center, Clinical Chemistry, Rotterdam, Netherlands (The)
| | - L.W Geenen
- Erasmus Medical Center, Cardiology, Rotterdam, Netherlands (The)
| | - L Tu
- INSERM UMR_S 999 Hôpital Marie Lannelongue and Université Paris-Saclay School of Medicine, Paris, France
| | - S Tian
- Erasmus Medical Center, Cardiology, Rotterdam, Netherlands (The)
| | | | - Y.B De Rijke
- Erasmus Medical Center, Clinical Chemistry, Rotterdam, Netherlands (The)
| | - I.K.M Reiss
- Erasmus Medical Center, Pediatrics/Neonatology, Rotterdam, Netherlands (The)
| | - E Boersma
- Erasmus University Medical Centre, Clinical Epidemiology, Rotterdam, Netherlands (The)
| | - D.J Duncker
- Erasmus Medical Center, Cardiology, Rotterdam, Netherlands (The)
| | - K.A Boomars
- Erasmus Medical Center, Pulmonary Medicine, Rotterdam, Netherlands (The)
| | - C Guignabert
- INSERM UMR_S 999 Hôpital Marie Lannelongue and Université Paris-Saclay School of Medicine, Paris, France
| | - D Merkus
- Erasmus Medical Center, Cardiology, Rotterdam, Netherlands (The)
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Cai Z, Klein T, Tu L, Geenen L, Tian S, Van Der Ley C, Van Faassen M, Kema I, Van Den Bosch A, De Rijke J, Reiss I, Duncker D, Boomars K, Guignabert C, Merkus D. Different tryptophan-kynurenine metabolism profiles in human pulmonary arterial hypertension and animal models of pulmonary hypertension. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.3814] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Background
De novo NAD+ synthesis through the tryptophan-kynurenine (TK) metabolism was recognized as an important pathway in improving mitochondrial function and survival of injury or apoptotic cells, which are key processes involved in the pathogenesis of pulmonary arterial hypertension (PAH). Although abnormal TK metabolism has been reported in human PAH, the difference between human and animal models of pulmonary hypertension (PH) are currently unknown.
Objective
Determine and compare TK metabolism profiles in plasma from human PAH and 3 animal models of PH.
Methods
Human plasma was collected from treatment naïve patients with PAH (n=43) and healthy controls (n=111). Animal plasma was collected from 3 animal models of PH and corresponding controls, including monocrotaline (MCT) induced PH in rat (n=7, control n=6), Sugen + hypoxia (SuHx) induced PH in rat (n=5, control n=6), and pulmonary vein banding (PVB) induced PH in swine (n=7, control n=6). TK metabolites were determined using liquid chromatography-tandem mass spectrometry (LC-MS/MS).
Results
TK metabolism was altered in the plasma from of PAH compared to healthy controls (Figure 1A). Lower tryptophan (0.8 fold vs Control, p<0.0001), maintained 3-hydroxyanthranilic acid, and higher kynurenine, 3-hydroxykynurenine, anthranilic acid, and quinolinic acid (1.5, 2.6, 2.0, 2.6 fold vs Control, respectively, p all<0.0001) were seen in the plasma from human PAH. In the rat SuHx-PH model, kynurenine (0.7 fold, p<0.01) and quinolinic acid (0.5 fold, p<0.001) were lower, while 3-hydroxyanthranilic acid (4.3 fold, p<0.001) was higher in PH compared to control (Figure 1B). However, the TK metabolism was unaltered in MCT-PH model in rat (Figure 1C), and PVB-PH model in swine (Figure 1D).
Conclusions
TK metabolism was altered in the plasma from human PAH. The TK metabolism profiles were different among 3 animal models of PH, but did not mimic the profile in human PAH. Further research is required to determine the mechanism(s) behind the abnormal TK metabolism in human PAH as well as whether these mechanisms relate to disease onset or progression.
Figure 1
Funding Acknowledgement
Type of funding source: Foundation. Main funding source(s): This work was supported by the China Scholarship Council (201606230252) as well as the Netherlands CardioVascular Research Initiative: an initiative with support of the Dutch Heart Foundation (CVON2014-11, RECONNECT), and German Center for Cardiovascular Research (DZHK81Z0600207). Instrumentation support was received from AB Sciex, ltd. for LC-MS/MS analyses performed in this study.
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Affiliation(s)
- Z Cai
- Erasmus Medical Center, Cardiology, Rotterdam, Netherlands (The)
| | - T Klein
- Erasmus Medical Center, Clinical Chemistry, Rotterdam, Netherlands (The)
| | - L Tu
- INSERM UMR_S 999 Hôpital Marie Lannelongue and Université Paris-Saclay School of Medicine, Paris, France
| | - L.W Geenen
- Erasmus Medical Center, Cardiology, Rotterdam, Netherlands (The)
| | - S Tian
- Erasmus Medical Center, Cardiology, Rotterdam, Netherlands (The)
| | - C Van Der Ley
- University Medical Center Groningen, Laboratory Medicine, Groningen, Netherlands (The)
| | - M Van Faassen
- University Medical Center Groningen, Laboratory Medicine, Groningen, Netherlands (The)
| | - I Kema
- University Medical Center Groningen, Laboratory Medicine, Groningen, Netherlands (The)
| | | | - J.B De Rijke
- Erasmus Medical Center, Clinical Chemistry, Rotterdam, Netherlands (The)
| | - I.K.M Reiss
- Erasmus Medical Center, Pediatrics/Neonatology, Rotterdam, Netherlands (The)
| | - D.J Duncker
- Erasmus Medical Center, Cardiology, Rotterdam, Netherlands (The)
| | - K.A Boomars
- Erasmus Medical Center, Pulmonary Medicine, Rotterdam, Netherlands (The)
| | - C Guignabert
- INSERM UMR_S 999 Hôpital Marie Lannelongue and Université Paris-Saclay School of Medicine, Paris, France
| | - D Merkus
- Erasmus Medical Center, Cardiology, Rotterdam, Netherlands (The)
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Klein T, Hartung D, Geddes J. Accessing the Oregon Frontier: The Impact of Expanding Authority for Buprenorphine to Nurse Practitioners. Health Serv Res 2020. [DOI: 10.1111/1475-6773.13432] [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: 12/01/2022] Open
Affiliation(s)
- T. Klein
- Washington State University Vancouver WA United States
- Oregon State University/OHSU College of Pharmacy Portland OR United States
| | - D. Hartung
- Oregon State University / Oregon Health & Science University College of Pharmacy Portland OR United States
| | - J. Geddes
- Oregon Health & Science University ‐ Portland State University Portland OR United States
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11
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Klein T, Tiosano S, Chohen A, Amital H. AB0419 THE COEXISTENCE OF FAMILIAL MEDITERRANEAN FEVER (FMF) IN SYSTEMIC LUPUS ERYTHEMATOSUS (SLE) PATIENTS - A CROSS SECTIONAL STUDY. Ann Rheum Dis 2020. [DOI: 10.1136/annrheumdis-2020-eular.2305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Background:Systemic Lupus Erythematosus (SLE) is a chronic autoimmune disease characterized by multisystem inflammatory lesions affecting many organ systems in the body. Familial Mediterranean fever (FMF) is an autosomal recessive disease of chronic autoimmune inflammation characterized by frequently relapsing self-limiting fever and inflammation that may be localized in peritoneum, pleura, joint or skin.1Previous studies have described the similarity of clinical symptoms of FMF among SLE patients. However, the literature on this topic is inconsistent and based mostly on case reports.2-4Objectives:To examine the proportions of coexistence of FMF among SLE patients compared to the general population. We hypothesized that the proportion of FMF among SLE patients is higher than the general population.Methods:This cross-sectional study used the Clalit Health Services database, the largest Health Maintenance Organization in Israel, serving 4,400,000 members. SLE patients were compared to age- and sex-matched controls. Chi- was used for univariate analysis.Results:The study included4886 SLEpatients and 24430 age- and sex-matched controls. The SLE group had a significantly higher proportion of FMF patients compared to non-SLE controls (0.68% and 0.21% respectively; p < 0.001).Table 1. All study populationTable 1.SLE patients and matched controls basic characteristicsNo SLESLEp.overallN=24430N=4886Age51.2±16.551.2±16.51.000Gender: Female20100 (82.3%)4020 (82.3%)1.000FMF52 (0.21%)33 (0.68%)<0.001Table 2. StratificationTable 2.comparison of FMF patients with and without SLEFMF without SLEFMF with SLEp.overallN=52N=33Age44.6±13.750.5±17.70.106Gender: Female45 (86.5%)26 (78.8%)0.523Conclusion:FMF was found to be more common amongst SLE patients compared to matched controls.The current study results suggest that the occurrence of SLE turn patients with an appropriate genetic and environmental setting to develop also FMF. This cross-sectional study sheds light on the coexistence of these two diseases, autoimmune and autoinflammatory.References:[1]Kucuk A, Gezer IA, Ucar R, Karahan AY. Familial mediterranean fever.Acta Medica (Hradec Kralove). 2014;57(3):97-104.[2]Lidar M, Zandman-Goddard G, Shinar Y, Zaks N, Livneh A, Langevitz P. SLE and FMF: A possible negative association between the two disease entities–report of four cases and review of the literature.Lupus. 2008;17(7):663-669.[3]Erten S, Taskaldiran I, Yakut ZI. Are systemic lupus erythematosus patients carrying MEFV gene less prone to renal involvement? report of three cases and review of the literature.Ren Fail. 2013;35(7):1013-1016.[4]Shinar Y, Kosach E, Langevitz P, et al. Familial mediterranean Fever gene (MEFV) mutations as a modifier of systemic lupus erythematosus.Lupus. 2012;21(9):993-998.Disclosure of Interests: :None declared
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Daveson AJM, Popp A, Taavela J, Goldstein KE, Isola J, Truitt KE, Mäki M, Anderson RP, Adams A, Andrews J, Behrend C, Brown G, Chen Yi Mei S, Coates A, Daveson A, DiMarino A, Elliott D, Epstein R, Feyen B, Fogel R, Friedenberg K, Gearry R, Gerdis M, Goldstein M, Gupta V, Holmes R, Holtmann G, Idarraga S, James G, King T, Klein T, Kupfer S, Lebwohl B, Lowe J, Murray J, Newton E, Quinn D, Radin D, Ritter T, Stacey H, Strout C, Stubbs R, Thackwray S, Trivedi V, Tye‐Din J, Weber J, Wilson S. Baseline quantitative histology in therapeutics trials reveals villus atrophy in most patients with coeliac disease who appear well controlled on gluten‐free diet. ACTA ACUST UNITED AC 2020. [DOI: 10.1002/ygh2.380] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
| | - Alina Popp
- Tampere Centre for Child Health Research Faculty of Medicine and Health Technology Tampere University and Tampere University Hospital Tampere Finland
- University of Medicine and Pharmacy "Carol Davila" and National Institute for Mother and Child Health "Alessandrescu‐Rusescu" Bucharest Romania
| | - Juha Taavela
- Tampere Centre for Child Health Research Faculty of Medicine and Health Technology Tampere University and Tampere University Hospital Tampere Finland
- Department of Internal Medicine Central Finland Central Hospital Jyväskylä Finland
| | | | - Jorma Isola
- Laboratory of Cancer Biology Faculty of Medicine and Health Technology Tampere University Tampere Finland
- Jilab Inc. Tampere Finland
| | | | - Markku Mäki
- Tampere Centre for Child Health Research Faculty of Medicine and Health Technology Tampere University and Tampere University Hospital Tampere Finland
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13
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Michon B, Girod C, Badoux S, Kačmarčík J, Ma Q, Dragomir M, Dabkowska HA, Gaulin BD, Zhou JS, Pyon S, Takayama T, Takagi H, Verret S, Doiron-Leyraud N, Marcenat C, Taillefer L, Klein T. Thermodynamic signatures of quantum criticality in cuprate superconductors. Nature 2019; 567:218-222. [PMID: 30760922 DOI: 10.1038/s41586-019-0932-x] [Citation(s) in RCA: 86] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Accepted: 12/17/2018] [Indexed: 11/09/2022]
Abstract
The three central phenomena of cuprate (copper oxide) superconductors are linked by a common doping level p*-at which the enigmatic pseudogap phase ends and the resistivity exhibits an anomalous linear dependence on temperature, and around which the superconducting phase forms a dome-shaped area in the phase diagram1. However, the fundamental nature of p* remains unclear, in particular regarding whether it marks a true quantum phase transition. Here we measure the specific heat C of the cuprates Eu-LSCO and Nd-LSCO at low temperature in magnetic fields large enough to suppress superconductivity, over a wide doping range2 that includes p*. As a function of doping, we find that Cel/T is strongly peaked at p* (where Cel is the electronic contribution to C) and exhibits a log(1/T) dependence as temperature T tends to zero. These are the classic thermodynamic signatures of a quantum critical point3-5, as observed in heavy-fermion6 and iron-based7 superconductors at the point where their antiferromagnetic phase comes to an end. We conclude that the pseudogap phase of cuprates ends at a quantum critical point, the associated fluctuations of which are probably involved in d-wave pairing and the anomalous scattering of charge carriers.
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Affiliation(s)
- B Michon
- Institut Néel, Université Grenoble Alpes, Grenoble, France.,Institut quantique, Département de physique and RQMP, Université de Sherbrooke, Sherbrooke, Québec, Canada.,CNRS, Institut Néel, Grenoble, France
| | - C Girod
- Institut Néel, Université Grenoble Alpes, Grenoble, France.,Institut quantique, Département de physique and RQMP, Université de Sherbrooke, Sherbrooke, Québec, Canada.,CNRS, Institut Néel, Grenoble, France
| | - S Badoux
- Institut quantique, Département de physique and RQMP, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - J Kačmarčík
- Institute of Experimental Physics, Slovak Academy of Sciences, Košice, Slovakia
| | - Q Ma
- Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, Canada
| | - M Dragomir
- Brockhouse Institute for Materials Research, McMaster University, Hamilton, Ontario, Canada
| | - H A Dabkowska
- Brockhouse Institute for Materials Research, McMaster University, Hamilton, Ontario, Canada
| | - B D Gaulin
- Department of Physics and Astronomy, McMaster University, Hamilton, Ontario, Canada.,Brockhouse Institute for Materials Research, McMaster University, Hamilton, Ontario, Canada.,Canadian Institute for Advanced Research, Toronto, Ontario, Canada
| | - J-S Zhou
- Materials Science and Engineering Program, Department of Mechanical Engineering, University of Texas at Austin, Austin, Texas, USA
| | - S Pyon
- Department of Advanced Materials Science, University of Tokyo, Kashiwa, Japan
| | - T Takayama
- Department of Advanced Materials Science, University of Tokyo, Kashiwa, Japan
| | - H Takagi
- Department of Advanced Materials Science, University of Tokyo, Kashiwa, Japan
| | - S Verret
- Institut quantique, Département de physique and RQMP, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - N Doiron-Leyraud
- Institut quantique, Département de physique and RQMP, Université de Sherbrooke, Sherbrooke, Québec, Canada
| | - C Marcenat
- Université Grenoble Alpes, CEA, INAC, PHELIQS, LATEQS, Grenoble, France
| | - L Taillefer
- Institut quantique, Département de physique and RQMP, Université de Sherbrooke, Sherbrooke, Québec, Canada. .,Canadian Institute for Advanced Research, Toronto, Ontario, Canada.
| | - T Klein
- Institut Néel, Université Grenoble Alpes, Grenoble, France. .,CNRS, Institut Néel, Grenoble, France.
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Batenburg SJ, Voigt S, Friedrich O, Osborne AH, Bornemann A, Klein T, Pérez-Díaz L, Frank M. Major intensification of Atlantic overturning circulation at the onset of Paleogene greenhouse warmth. Nat Commun 2018; 9:4954. [PMID: 30470783 PMCID: PMC6251870 DOI: 10.1038/s41467-018-07457-7] [Citation(s) in RCA: 20] [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: 03/08/2018] [Accepted: 11/01/2018] [Indexed: 11/09/2022] Open
Abstract
During the Late Cretaceous and early Cenozoic the Earth experienced prolonged climatic cooling most likely caused by decreasing volcanic activity and atmospheric CO2 levels. However, the causes and mechanisms of subsequent major global warming culminating in the late Paleocene to Eocene greenhouse climate remain enigmatic. We present deep and intermediate water Nd-isotope records from the North and South Atlantic to decipher the control of the opening Atlantic Ocean on ocean circulation and its linkages to the evolution of global climate. The marked convergence of Nd-isotope signatures 59 million years ago indicates a major intensification of deep-water exchange between the North and South Atlantic, which coincided with the turning point of deep-water temperatures towards early Paleogene warming. We propose that this intensification of Atlantic overturning circulation in concert with increased atmospheric CO2 from continental rifting marked a climatic tipping point contributing to a more efficient distribution of heat over the planet.
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Affiliation(s)
- S J Batenburg
- Institut für Geowissenschaften, Goethe-Universität Frankfurt, Altenhöferallee 1, Frankfurt am Main, 60438, Germany. .,Department of Earth Sciences, University of Oxford, South Parks Road, Oxford, OX1 3AN, UK.
| | - S Voigt
- Institut für Geowissenschaften, Goethe-Universität Frankfurt, Altenhöferallee 1, Frankfurt am Main, 60438, Germany
| | - O Friedrich
- Institut für Geowissenschaften, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 234-236, 69120, Heidelberg, Germany
| | - A H Osborne
- GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, Wischhofstr. 1-3, Kiel, 24148, Germany
| | - A Bornemann
- Bundesanstalt für Geowissenschaften und Rohstoffe, Stilleweg 2, 30655, Hannover, Germany
| | - T Klein
- Institut für Geowissenschaften, Goethe-Universität Frankfurt, Altenhöferallee 1, Frankfurt am Main, 60438, Germany
| | - L Pérez-Díaz
- Department of Earth Sciences, Royal Holloway, University of London, Egham, TW20 0EX, UK
| | - M Frank
- GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel, Wischhofstr. 1-3, Kiel, 24148, Germany
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Kačmarčík J, Vinograd I, Michon B, Rydh A, Demuer A, Zhou R, Mayaffre H, Liang R, Hardy WN, Bonn DA, Doiron-Leyraud N, Taillefer L, Julien MH, Marcenat C, Klein T. Unusual Interplay between Superconductivity and Field-Induced Charge Order in YBa_{2}Cu_{3}O_{y}. Phys Rev Lett 2018; 121:167002. [PMID: 30387647 DOI: 10.1103/physrevlett.121.167002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2018] [Indexed: 06/08/2023]
Abstract
We present a detailed study of the temperature (T) and magnetic field (H) dependence of the electronic density of states (DOS) at the Fermi level, as deduced from specific heat and Knight shift measurements in underdoped YBa_{2}Cu_{3}O_{y}. We find that the DOS becomes field independent above a characteristic field H_{DOS}, and that the H_{DOS}(T) line displays an unusual inflection near the onset of the long-range 3D charge-density wave order. The unusual S shape of H_{DOS}(T) is suggestive of two mutually exclusive orders that eventually establish a form of cooperation in order to coexist at low T. On theoretical grounds, such a collaboration could result from the stabilization of a pair-density wave state, which calls for further investigation in this region of the phase diagram.
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Affiliation(s)
- J Kačmarčík
- Université Grenoble Alpes, CNRS, Grenoble INP, Institut Néel, F-38000 Grenoble, France
- Institute of Experimental Physics, Slovak Academy of Sciences, SK-04001 Košice, Slovakia
| | - I Vinograd
- Université Grenoble Alpes, INSA Toulouse, Université Toulouse Paul Sabatier, CNRS, LNCMI, F-38000 Grenoble, France
| | - B Michon
- Université Grenoble Alpes, CNRS, Grenoble INP, Institut Néel, F-38000 Grenoble, France
- Institut quantique, Département de physique & RQMP, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
| | - A Rydh
- Départment of Physics, Stockholm University, AlbaNova University Center, SE-10691 Stockholm, Sweden
| | - A Demuer
- Université Grenoble Alpes, INSA Toulouse, Université Toulouse Paul Sabatier, CNRS, LNCMI, F-38000 Grenoble, France
| | - R Zhou
- Université Grenoble Alpes, INSA Toulouse, Université Toulouse Paul Sabatier, CNRS, LNCMI, F-38000 Grenoble, France
| | - H Mayaffre
- Université Grenoble Alpes, INSA Toulouse, Université Toulouse Paul Sabatier, CNRS, LNCMI, F-38000 Grenoble, France
| | - R Liang
- Department of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
- Canadian Institute for Advanced Research, Toronto, Ontario M5G 1M1, Canada
| | - W N Hardy
- Department of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
- Canadian Institute for Advanced Research, Toronto, Ontario M5G 1M1, Canada
| | - D A Bonn
- Department of Physics and Astronomy, University of British Columbia, Vancouver, BC V6T 1Z1, Canada
- Canadian Institute for Advanced Research, Toronto, Ontario M5G 1M1, Canada
| | - N Doiron-Leyraud
- Institut quantique, Département de physique & RQMP, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
| | - L Taillefer
- Institut quantique, Département de physique & RQMP, Université de Sherbrooke, Sherbrooke, Québec J1K 2R1, Canada
- Canadian Institute for Advanced Research, Toronto, Ontario M5G 1M1, Canada
| | - M-H Julien
- Université Grenoble Alpes, INSA Toulouse, Université Toulouse Paul Sabatier, CNRS, LNCMI, F-38000 Grenoble, France
| | - C Marcenat
- Université Grenoble Alpes, CEA, INAC, PhELIQS, LATEQS, F-38000 Grenoble, France
| | - T Klein
- Université Grenoble Alpes, CNRS, Grenoble INP, Institut Néel, F-38000 Grenoble, France
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16
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Maleeva N, Grünhaupt L, Klein T, Levy-Bertrand F, Dupre O, Calvo M, Valenti F, Winkel P, Friedrich F, Wernsdorfer W, Ustinov AV, Rotzinger H, Monfardini A, Fistul MV, Pop IM. Circuit quantum electrodynamics of granular aluminum resonators. Nat Commun 2018; 9:3889. [PMID: 30250205 PMCID: PMC6155321 DOI: 10.1038/s41467-018-06386-9] [Citation(s) in RCA: 58] [Impact Index Per Article: 9.7] [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: 03/03/2018] [Accepted: 08/31/2018] [Indexed: 11/09/2022] Open
Abstract
Granular aluminum (grAl) is a promising high kinetic inductance material for detectors, amplifiers, and qubits. Here we model the grAl structure, consisting of pure aluminum grains separated by thin aluminum oxide barriers, as a network of Josephson junctions, and we calculate the dispersion relation and nonlinearity (self-Kerr and cross-Kerr coefficients). To experimentally study the electrodynamics of grAl thin films, we measure microwave resonators with open-boundary conditions and test the theoretical predictions in two limits. For low frequencies, we use standard microwave reflection measurements in a low-loss environment. The measured low-frequency modes are in agreement with our dispersion relation model, and we observe self-Kerr coefficients within an order of magnitude from our calculation starting from the grAl microstructure. Using a high-frequency setup, we measure the plasma frequency of the film around 70 GHz, in agreement with the analytical prediction.
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Affiliation(s)
- N Maleeva
- Physikalisches Institut, Karlsruhe Institute of Technology, Wolfgang-Gaede-Str. 1, 76131, Karlsruhe, Germany
| | - L Grünhaupt
- Physikalisches Institut, Karlsruhe Institute of Technology, Wolfgang-Gaede-Str. 1, 76131, Karlsruhe, Germany
| | - T Klein
- Universite Grenoble Alpes, Institut NEEL, 25 rue des Martyrs BP 166, F-3800, Grenoble, France
- CNRS, Institut NEEL, 25 rue des Martyrs BP 166, F-3800, Grenoble, France
| | - F Levy-Bertrand
- Universite Grenoble Alpes, Institut NEEL, 25 rue des Martyrs BP 166, F-3800, Grenoble, France
- CNRS, Institut NEEL, 25 rue des Martyrs BP 166, F-3800, Grenoble, France
| | - O Dupre
- Universite Grenoble Alpes, Institut NEEL, 25 rue des Martyrs BP 166, F-3800, Grenoble, France
- CNRS, Institut NEEL, 25 rue des Martyrs BP 166, F-3800, Grenoble, France
| | - M Calvo
- Universite Grenoble Alpes, Institut NEEL, 25 rue des Martyrs BP 166, F-3800, Grenoble, France
- CNRS, Institut NEEL, 25 rue des Martyrs BP 166, F-3800, Grenoble, France
| | - F Valenti
- Physikalisches Institut, Karlsruhe Institute of Technology, Wolfgang-Gaede-Str. 1, 76131, Karlsruhe, Germany
| | - P Winkel
- Physikalisches Institut, Karlsruhe Institute of Technology, Wolfgang-Gaede-Str. 1, 76131, Karlsruhe, Germany
| | - F Friedrich
- Physikalisches Institut, Karlsruhe Institute of Technology, Wolfgang-Gaede-Str. 1, 76131, Karlsruhe, Germany
| | - W Wernsdorfer
- Physikalisches Institut, Karlsruhe Institute of Technology, Wolfgang-Gaede-Str. 1, 76131, Karlsruhe, Germany
- CNRS, Institut NEEL, 25 rue des Martyrs BP 166, F-3800, Grenoble, France
- Institute of Nanotechnology, Karlsruhe Institute of Technology, 76344, Eggenstein Leopoldshafen, Germany
| | - A V Ustinov
- Physikalisches Institut, Karlsruhe Institute of Technology, Wolfgang-Gaede-Str. 1, 76131, Karlsruhe, Germany
- Russian Quantum Center, National University of Science and Technology MISIS, Leninskiy prsp., 4, 119049, Moscow, Russia
| | - H Rotzinger
- Physikalisches Institut, Karlsruhe Institute of Technology, Wolfgang-Gaede-Str. 1, 76131, Karlsruhe, Germany
| | - A Monfardini
- Universite Grenoble Alpes, Institut NEEL, 25 rue des Martyrs BP 166, F-3800, Grenoble, France
- CNRS, Institut NEEL, 25 rue des Martyrs BP 166, F-3800, Grenoble, France
| | - M V Fistul
- Russian Quantum Center, National University of Science and Technology MISIS, Leninskiy prsp., 4, 119049, Moscow, Russia
- Center for Theoretical Physics of Complex Systems, Institute for Basic Science, Expo-ro 55, Yuseong-gu, 34051, Daejeon, Republic of Korea
| | - I M Pop
- Physikalisches Institut, Karlsruhe Institute of Technology, Wolfgang-Gaede-Str. 1, 76131, Karlsruhe, Germany.
- Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344, Eggenstein Leopoldshafen, Germany.
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Cuijpers I, Carai P, Papageorgiou A, Klein T, Jones E, Hamdani N, Heymans S. P123DPP-4 inhibition by Linagliptin prevents cardiac inflammation, fibrosis, hypertrophy, and stiffness in obese ZSF1 rats. Cardiovasc Res 2018. [DOI: 10.1093/cvr/cvy060.085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
| | - P Carai
- KU Leuven, CMVB, Leuven, Belgium
| | | | - T Klein
- Boehringer Ingelheim Pharma GmbH & Co. KG, Ingelheim am Rhein, Germany
| | - E Jones
- KU Leuven, CMVB, Leuven, Belgium
| | - N Hamdani
- Ruhr University Bochum (RUB), Department of Cardiovascular Physiology, Bochum, Germany
| | - S Heymans
- Maastricht University Medical Centre (MUMC), Cardiology, Maastricht, Netherlands
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Siwy J, Mischak H, Klein T, Eynatten M. Urin-Proteomanalyse als möglicher Indikator für das Behandlungspotential des DPP-4-Inhibitors Linagliptin bei Patienten mit diabetischer Nierenerkrankung. DIABETOL STOFFWECHS 2018. [DOI: 10.1055/s-0038-1641957] [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)
- J Siwy
- Mosaiques-Diagnostics GmbH, Hannover, Germany
| | - H Mischak
- Mosaiques-Diagnostics GmbH, Hannover, Germany
| | - T Klein
- Böhringer Ingelheim Pharma GmbH & Co. KG, Ingelheim, Germany
| | - M Eynatten
- Böhringer Ingelheim Pharma GmbH & Co. KG, Ingelheim, Germany
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KOLB J, Klee J, Klein T, Kufner C, Wieser W, Neubauer A, Huber R. Ultrawidefield OCT. Acta Ophthalmol 2017. [DOI: 10.1111/j.1755-3768.2017.02355] [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: 11/28/2022]
Affiliation(s)
- J.P. KOLB
- University of Lubeck; Institute of Biomedical Optics; Lübeck Germany
| | - J. Klee
- University of Lubeck; Institute of Biomedical Optics; Lübeck Germany
| | | | - C. Kufner
- Ludwig-Maximilians-Universität; Faculty of Physics; Munich Germany
| | | | - A. Neubauer
- Ludwig-Maximilians-Universität, Eye Clinic; Munich Germany
| | - R. Huber
- University of Lubeck; Institute of Biomedical Optics; Lübeck Germany
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Crisan A, Klein T, Rohlsberger R, Burkel E, Crisan O. Alternative Solutions for Data Storage Using Magnetic Films Exchange-Coupled Through Non-Magnetic Layer. IJRS 2017. [DOI: 10.24178/ijrs.2017.3.2.01] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Abstract—We describe an alternative solution to encode information in magnetic films that goes beyond the conventional way of digital magnetic recording. In our approach the information is stored via a continuous variable, namely the remanent coupling angle between two magnetic films that are separated by a nonmagnetic spacer layer. Using the technique of nuclear resonant scattering (NRS) [1, 2] we show with good precision, how this coupling angle can be conveniently adjusted with high degree of remanence by shortly applied external magnetic fields. Moreover this effect is explained using a micromagnetic model [3, 4]. Extremely important for future applications of this concept, we demonstrate, that the remanent coupling angles can be read out via magneto-optical or magneto-resistance effects. In principle, this approach allows to design novel memory cells for advance data storage devices, where multiple states per unit cell can be generated and recorded.
Index Terms—Magnetic films, data storage, FePt
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Kesch C, Radtke JP, Distler F, Boxler S, Klein T, Hüttenbrink C, Hees K, Roth W, Roethke M, Schlemmer HP, Hohenfellner M, Hadaschik BA. [Multiparametric MRI and MRI-TRUS fusion biopsy in patients with prior negative prostate biopsy]. Urologe A 2017; 55:1071-7. [PMID: 27168038 DOI: 10.1007/s00120-016-0093-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [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: 11/24/2022]
Abstract
BACKGROUND Multiparametric MRI (mpMRI) plays an increasingly important role in prostate cancer (PCa) diagnostics and is recommended in men with previously negative TRUS biopsy. The optimal biopsy method after mpMRI is under discussion. OBJECTIVE Prospective, PIRADS- and START-conform analysis of the relevance of mpMRI and MRI-TRUS fusion biopsy in patients with prior negative TRUS biopsy and comparison of the detection rates of fusion-targeted biopsies (tB) and systematic transperineal saturation biopsies (sB). MATERIALS AND METHODS Between 10/2012 and 09/2015, 287 patients with prior negative TRUS biopsy underwent mpMRI and software-assisted, rigid MRI-TRUS fusion biopsy. In addition to and strictly separated from sB (median cores n = 24), tB (median cores per patient n = 4, per lesion n = 3) were performed in case of suspicious MRI lesions (PIRADS ≥ 2). Both biopsy methods were compared by using McNemar's test. RESULTS Of the 287 patients, 148 (52 %) had positive biopsies. Of these, 108/287 (38 %) had significant PCa (Gleason Score [GS] = 3 + 3 and PSA ≥ 10 ng/ml or GS ≥ 3 + 4) and again 43/287 (15 %) had a GS ≥ 4 + 3 PCa. sB failed to diagnose 8/148 PCa (5.4 %) and 6/108 significant PCa (5.5 %), whereas tB failed to diagnose 48 (32.4 %) PCa (p < 0.0001) and 22 (20.4 %) significant PCa (p = 0.0046). Of the PCa missed by tB, 11 had a GS ≥ 3 + 4 and 5 of these a GS = 4 + 3. On a per patient basis, MRI failed to detect 5 significant PCa, whereby 17 of the significant PCa were missed by fusion-targeted cores alone. CONCLUSIONS In men with unsuspicious MRI (PIRADS < 3), there is a 11 % risk of significant PCa. In case of suspicious MRI lesions, the combination of both biopsy approaches offers maximum tumor detection.
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Affiliation(s)
- C Kesch
- Urologische Universitätsklinik Heidelberg, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 110, 69120, Heidelberg, Deutschland.
| | - J P Radtke
- Urologische Universitätsklinik Heidelberg, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 110, 69120, Heidelberg, Deutschland.,Abteilung für Radiologie, Deutsches Krebsforschungszentrum, Heidelberg, Deutschland
| | - F Distler
- Urologische Universitätsklinik Heidelberg, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 110, 69120, Heidelberg, Deutschland
| | - S Boxler
- Universitätsklinik für Urologie, Universität Bern, Bern, Schweiz
| | - T Klein
- Urologische Universitätsklinik Heidelberg, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 110, 69120, Heidelberg, Deutschland
| | - C Hüttenbrink
- Urologische Universitätsklinik Heidelberg, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 110, 69120, Heidelberg, Deutschland
| | - K Hees
- Institut für Medizinische Biometrie und Informatik, Heidelberg, Deutschland
| | - W Roth
- Pathologisches Institut der Universität Heidelberg, Universität Heidelberg, Heidelberg, Deutschland
| | - M Roethke
- Abteilung für Radiologie, Deutsches Krebsforschungszentrum, Heidelberg, Deutschland
| | - H P Schlemmer
- Abteilung für Radiologie, Deutsches Krebsforschungszentrum, Heidelberg, Deutschland
| | - M Hohenfellner
- Urologische Universitätsklinik Heidelberg, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 110, 69120, Heidelberg, Deutschland
| | - B A Hadaschik
- Urologische Universitätsklinik Heidelberg, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 110, 69120, Heidelberg, Deutschland
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Kurilov R, Juraeva D, Weese D, Klein T, Kapushesky M, Brors B. Drug response prediction system for personalized cancer therapy. Eur J Cancer 2016. [DOI: 10.1016/s0959-8049(16)32838-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Henderson SJ, Konkar A, Hornigold DC, Trevaskis JL, Jackson R, Fritsch Fredin M, Jansson‐Löfmark R, Naylor J, Rossi A, Bednarek MA, Bhagroo N, Salari H, Will S, Oldham S, Hansen G, Feigh M, Klein T, Grimsby J, Maguire S, Jermutus L, Rondinone CM, Coghlan MP. Robust anti-obesity and metabolic effects of a dual GLP-1/glucagon receptor peptide agonist in rodents and non-human primates. Diabetes Obes Metab 2016; 18:1176-1190. [PMID: 27377054 PMCID: PMC5129521 DOI: 10.1111/dom.12735] [Citation(s) in RCA: 172] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/29/2015] [Revised: 06/20/2016] [Accepted: 06/29/2016] [Indexed: 01/11/2023]
Abstract
AIMS To characterize the pharmacology of MEDI0382, a peptide dual agonist of glucagon-like peptide-1 (GLP-1) and glucagon receptors. MATERIALS AND METHODS MEDI0382 was evaluated in vitro for its ability to stimulate cAMP accumulation in cell lines expressing transfected recombinant or endogenous GLP-1 or glucagon receptors, to potentiate glucose-stimulated insulin secretion (GSIS) in pancreatic β-cell lines and stimulate hepatic glucose output (HGO) by primary hepatocytes. The ability of MEDI0382 to reduce body weight and improve energy balance (i.e. food intake and energy expenditure), as well as control blood glucose, was evaluated in mouse models of obesity and healthy cynomolgus monkeys following single and repeated daily subcutaneous administration for up to 2 months. RESULTS MEDI0382 potently activated rodent, cynomolgus and human GLP-1 and glucagon receptors and exhibited a fivefold bias for activation of GLP-1 receptor versus the glucagon receptor. MEDI0382 produced superior weight loss and comparable glucose lowering to the GLP-1 peptide analogue liraglutide when administered daily at comparable doses in DIO mice. The additional fat mass reduction elicited by MEDI0382 probably results from a glucagon receptor-mediated increase in energy expenditure, whereas food intake suppression results from activation of the GLP-1 receptor. Notably, the significant weight loss elicited by MEDI0382 in DIO mice was recapitulated in cynomolgus monkeys. CONCLUSIONS Repeated administration of MEDI0382 elicits profound weight loss in DIO mice and non-human primates, produces robust glucose control and reduces hepatic fat content and fasting insulin and glucose levels. The balance of activities at the GLP-1 and glucagon receptors is considered to be optimal for achieving weight and glucose control in overweight or obese Type 2 diabetic patients.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | - S. Will
- MedImmune LLCGaithersburgMDUSA
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Klein T, Cohen S, Paudel I, Preisler Y, Rotenberg E, Yakir D. Diurnal dynamics of water transport, storage and hydraulic conductivity in pine trees under seasonal drought. iForest 2016; 9:710-719. [PMID: 0 DOI: 10.3832/ifor2046-009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
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Honoré C, Rescan C, Hald J, McGrath PS, Petersen MBK, Hansson M, Klein T, Østergaard S, Wells JM, Madsen OD. Revisiting the immunocytochemical detection of Neurogenin 3 expression in mouse and man. Diabetes Obes Metab 2016; 18 Suppl 1:10-22. [PMID: 27615127 DOI: 10.1111/dom.12718] [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] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Accepted: 05/08/2016] [Indexed: 12/13/2022]
Abstract
During embryonic development, endocrine cells of the pancreas are specified from multipotent progenitors. The transcription factor Neurogenin 3 (NEUROG3) is critical for this development and it has been shown that all endocrine cells of the pancreas arise from endocrine progenitors expressing NEUROG3. A thorough understanding of the role of NEUROG3 during development, directed differentiation of pluripotent stem cells and in models of cellular reprogramming, will guide future efforts directed at finding novel sources of β-cells for cell replacement therapies. In this article, we review the expression and function of NEUROG3 in both mouse and human and present the further characterization of a monoclonal antibody directed against NEUROG3. This antibody has been previously been used for detection of both mouse and human NEUROG3. However, our results suggest that the epitope recognized by this antibody is specific to mouse NEUROG3. Thus, we have also generated a monoclonal antibody specifically recognizing human NEUROG3 and present the characterization of this antibody here. Together, these antibodies will provide useful tools for future studies of NEUROG3 expression, and the data presented in this article suggest that recently described expression patterns of NEUROG3 in human foetal and adult pancreas should be re-examined.
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Affiliation(s)
- C Honoré
- Department of Islet and Stem Cell Biology, Novo Nordisk A/S, Måløv, Denmark.
| | - C Rescan
- Department of Islet and Stem Cell Biology, Novo Nordisk A/S, Måløv, Denmark
| | - J Hald
- Department of Islet and Stem Cell Biology, Novo Nordisk A/S, Måløv, Denmark
| | - P S McGrath
- Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - M B K Petersen
- Department of Islet and Stem Cell Biology, Novo Nordisk A/S, Måløv, Denmark
| | - M Hansson
- Department of Islet and Stem Cell Biology, Novo Nordisk A/S, Måløv, Denmark
| | - T Klein
- Gubra Aps, Agern Alle 1, Hørsholm, Denmark
| | - S Østergaard
- Department of Islet and Stem Cell Biology, Novo Nordisk A/S, Måløv, Denmark
| | - J M Wells
- Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
- Division of Endocrinology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - O D Madsen
- Department of Islet and Stem Cell Biology, Novo Nordisk A/S, Måløv, Denmark
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Darsalia V, Larsson M, Lietzau G, Nathanson D, Nyström T, Klein T, Patrone C. Gliptin-mediated neuroprotection against stroke requires chronic pretreatment and is independent of glucagon-like peptide-1 receptor. Diabetes Obes Metab 2016; 18:537-41. [PMID: 26847506 DOI: 10.1111/dom.12641] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Revised: 12/17/2015] [Accepted: 02/02/2016] [Indexed: 01/16/2023]
Abstract
Gliptins are anti-type 2 diabetes (T2D) drugs that regulate glycaemia by preventing endogenous glucagon-like peptide-1 (GLP-1) degradation. Chronically administered gliptins before experimental stroke can also induce neuroprotection, and this effect is potentially relevant for reducing brain damage in patients with T2D and high risk of stroke. It is not known, however, whether acute gliptin treatment after stroke (mimicking a post-hospitalization treatment) is neuroprotective or whether gliptin-mediated neuroprotection occurs via GLP-1-receptor (GLP-1R) activation. To answer these two questions, wild-type and glp-1r(-/-) mice were subjected to transient middle cerebral artery occlusion (MCAO). Linagliptin was administered acutely (50 mg/kg intravenously), at MCAO time or chronically (10 mg/kg orally) for 4 weeks before and 3 weeks after MCAO. Neuroprotection was assessed by stroke volume measurement and quantification of NeuN-positive surviving neurons. Plasma/brain GLP-1 levels and dipeptidyl peptidase-4 activity were also measured. The results show that the linagliptin-mediated neuroprotection against stroke requires chronic pretreatment and does not occur via GLP-1R. The findings provide essential new knowledge with regard to the potential clinical use of gliptins against stroke, as well as a strong impetus to identify gliptin-mediated neuroprotective mechanisms.
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Affiliation(s)
- V Darsalia
- Department of Clinical Science and Education, Södersjukhuset, Internal Medicine, Karolinska Institutet, Stockholm, Sweden
| | - M Larsson
- Department of Clinical Science and Education, Södersjukhuset, Internal Medicine, Karolinska Institutet, Stockholm, Sweden
| | - G Lietzau
- Department of Clinical Science and Education, Södersjukhuset, Internal Medicine, Karolinska Institutet, Stockholm, Sweden
- Department of Anatomy and Neurobiology, Medical University of Gdansk, Gdansk, Poland
| | - D Nathanson
- Department of Clinical Science and Education, Södersjukhuset, Internal Medicine, Karolinska Institutet, Stockholm, Sweden
| | - T Nyström
- Department of Clinical Science and Education, Södersjukhuset, Internal Medicine, Karolinska Institutet, Stockholm, Sweden
| | - T Klein
- Department of CardioMetabolic Diseases Research, Boehringer Ingelheim Pharma GmbH & Co. KG, Biberach, Germany
| | - C Patrone
- Department of Clinical Science and Education, Södersjukhuset, Internal Medicine, Karolinska Institutet, Stockholm, Sweden
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Schlotterer A, Dietrich N, Kolibabka M, Fleming T, Klein T, Nawroth P, Hammes HP. Einfluss reaktiver Metabolite auf Gefäßschaden, Mikroglia-Aktivierung und neuronale Funktion in der diabetischen Retina. DIABETOL STOFFWECHS 2016. [DOI: 10.1055/s-0036-1580826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Acunman K, Dietrich N, Schlotterer A, Kern L, Klein T, Hammes HP. Der Einfluss des Dipeptidyl Peptidase 4 Inhibitors Bl 1356 (Linagliptin) auf die proliferative Retinopathie im Maus-Modell. DIABETOL STOFFWECHS 2016. [DOI: 10.1055/s-0036-1580905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Klein T, Siegwolf RTW, Korner C. Belowground carbon trade among tall trees in a temperate forest. Science 2016; 352:342-4. [DOI: 10.1126/science.aad6188] [Citation(s) in RCA: 141] [Impact Index Per Article: 17.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2015] [Accepted: 03/02/2016] [Indexed: 11/02/2022]
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Wongchai K, Schlotterer A, Lin J, Humpert PM, Klein T, Hammes HP, Morcos M. Protective Effects of Liraglutide and Linagliptin in C. elegans as a New Model for Glucose-Induced Neurodegeneration. Horm Metab Res 2016; 48:70-5. [PMID: 25951323 DOI: 10.1055/s-0035-1549876] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Liraglutide and linagliptin are novel drugs for the treatment of diabetes. Antioxidative and neuroprotective effects have been described for both compounds. However, it is not yet known, whether these mechanisms are also protective against diabetic retinal neurodegeneration. We assessed the antioxidative and neuroprotective capabilities of liraglutide and linagliptin as well as the signaling pathways involved, by using C. elegans as a model for glucose-induced neurodegeneration. C. elegans were cultivated under conditions, which mimic clinical hyperglycemia, and treated with 160 μmol/l liraglutide or 13 μmol/l linagliptin. Oxidative stress was reduced by 29 or 78% and methylglyoxal-derived advanced glycation endproducts (AGEs) by 33 or 22%, respectively. This resulted in an improved neuronal function by 42 or 60% and an extended mean lifespan by 9 or 11%, respectively. Antioxidative and AGE reducing effects of liraglutide and linagliptin were not dependent on v-akt murine thymoma viral oncogene homologue 1/forkhead box O1 (AKT1/FOXO). Neuroprotection by liraglutide was AKT1/FOXO dependent, yet AKT1/FOXO independent upon linagliptin treatment. Both liraglutide and linagliptin exert neuroprotective effects in an experimental model for glucose-induced neurodegeneration, however, the signaling pathways differ in the present study. Further pharmacological intervention with these pathways may help to delay the clinical onset of diabetic retinopathy by preserving neuronal integrity.
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Affiliation(s)
- K Wongchai
- 5th Medical Department, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - A Schlotterer
- 5th Medical Department, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - J Lin
- 5th Medical Department, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - P M Humpert
- Stoffwechselzentrum Rhein-Pfalz, Innere Medizin, Endocrinologie & Diabetologie, Mannheim, Germany
| | - T Klein
- Boehringer Mannheim Pharma GmbH & Co. KG., Metabolic Diseases, Biberach an der Riß, Germany
| | - H-P Hammes
- 5th Medical Department, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - M Morcos
- Stoffwechselzentrum Rhein-Pfalz, Innere Medizin, Endocrinologie & Diabetologie, Mannheim, Germany
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Radtke JP, Schwab C, Wolf MB, Freitag MT, Alt C, Kesch C, Popeneciu IV, Huettenbrink C, Bergstraesser-Gasch C, Klein T, Duensing S, Roth S, Schlemmer HP, Roethke M, Hohenfellner M, Hadaschik B. Multiparametric magnetic resonance tomography and MRI/TRUS-fusion-biopsy for index lesion detection: correlation with radical prostatectomy specimen. Cancer Imaging 2015. [PMCID: PMC4601104 DOI: 10.1186/1470-7330-15-s1-s1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Klein T, Semaan A, Kellner M, Ritgen J, Boemers T, Stressig R. Coincidence of congenital left-sided diaphragmatic hernia and ductus venosus agenesis: Relation between altered hemodynamic flow and lung-to-head-ratio? Journal of Pediatric Surgery Case Reports 2015. [DOI: 10.1016/j.epsc.2015.04.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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Kolb JP, Klein T, Kufner CL, Wieser W, Draxinger W, Huber R. Track B. Biophotonics. BIOMED ENG-BIOMED TE 2015; 60 Suppl 1:s31-4. [DOI: 10.1515/bmt-2015-5001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Abstract
A month-old baby girl with blood type O positive received a donor heart organ from a donor with blood type B. This was the first institutional ABO-incompatible heart transplant. Infants listed for transplantation may be considered for an ABO-incompatible heart transplant based on their antibody levels and age. The United Network of Organ Sharing (UNOS) protocol is infants under 24 months with titers less than or equal to 1:4.(1) This recipient's anti-A and anti-B antibodies were monitored with titer assays to determine their levels; antibody levels less than 1:4 are acceptable pre-transplant in order to proceed with donor and transplant arrangements.1 Immediately prior to initiating cardiopulmonary bypass (CPB), a complete whole body exchange transfusion of at least two-times the patient's circulating blood volume was performed with packed red blood cells (pRBC), fresh frozen plasma (FFP) and 25% albumin. Titer assays were sent two minutes after initiation of full CPB and then hourly until the cross-clamp was removed. Institutionally, reperfusion of the donor heart is not restored until the antibody level from the titer assay is known and reported as less than 1:4; failing to achieve an immulogically tolerant recipient will provide conditions for hyperacute rejection. The blood collected during the transfusion exchange was immediately processed through a cell saver so the pRBC's could be re-infused to the patient during CPB, as necessary. The remainder of the transplant was performed in the same fashion as an ABO-compatible heart transplant. The patient has shown no signs of rejection following transplantation.
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Affiliation(s)
- M Hageman
- Vanderbilt University Medical Center Cardiovascular Perfusion Technology Program, Nashville, Tennessee, USA
| | - N Michaud
- Vanderbilt University Medical Center Cardiovascular Perfusion Technology Program, Nashville, Tennessee, USA
| | - I Chinnappan
- Monroe Carell Jr. Children's Hospital at Vanderbilt, Nashville, Tennessee, USA
| | - T Klein
- Monroe Carell Jr. Children's Hospital at Vanderbilt, Nashville, Tennessee, USA
| | - B Mettler
- Monroe Carell Jr. Children's Hospital at Vanderbilt, Nashville, Tennessee, USA
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von Roth P, Matziolis G, Pfitzner T, Mayr HO, Klein T, Preininger B, Winkler T, Hube R. [Early results of gender-specific posterior stabilized total knee arthroplasty without patella resurfacing]. Orthopade 2014; 42:866-73. [PMID: 23812209 DOI: 10.1007/s00132-013-2139-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
INTRODUCTION To address anatomical gender differences in total knee arthroplasty (TKA) specific total knee prostheses have been developed for women. Potential benefits of these modified prostheses are currently under debate. The present study investigated whether the modified design features bring benefits compared to uni-sex TKA. METHODS A total of 80 prospectively blinded and randomized patients underwent implantation of unilateral TKAs with NexGen LPS Gender Solutions (Zimmer, Warsaw, USA, group gender-specific GS prosthesis, n = 40) or NexGen LPS Flex (Zimmer, Warsaw, USA, control group standard prosthesis ST, n = 40) The follow-up was carried out 10 days and 6 weeks postoperatively. Clinical data and the subjective assessment of quality of life were evaluated using the Knee Society Clinical Rating System (KSS), the short form 36-item health survey (SF-36) and the Western Ontario and McMaster Universities OA Index (WOMAC). RESULTS The two groups showed equal values in KSS, SF-36 and WOMAC preoperatively and ten days postoperatively the GS group reached an average KSS knee score of 62.6 ± 16.1 points (ST group 56.9 ± 14.7, p = 0.184) and a functional score of 28.5 ± 12.1 (ST group 24.3 ± 15.3, p = 0.082). In the overall score the GS group reached 91.1 ± 24.1 points (ST group 81.0 ± 27.1, p = 0.104). The GS group reached a knee score of 85.5 ± 14.4 points (ST group 77.8 ± 16.8, p = 0.03) and a functional score of 68.1 ± 20.7 points (ST group 62.3 ± 18.5, p = 0.185) 6 weeks postoperatively. In the overall score the GS group reached 153.7 ± 30.7 points (ST group 139.6 ± 32.4, p = 0.048). The analysis of SF-36 and WOMAC showed no significant differences at all time points. No evidence of loosening or migration was observed in both groups. CONCLUSIONS Based on the data presented, gender-specific TKA type NexGen LPS Gender Solutions has advantages in terms of early functional outcome. This result is not reflected in the patient satisfaction and is not considered to be clinically relevant.
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Affiliation(s)
- P von Roth
- Centrum für Muskuloskeletale Chirurgie - Klinik für Orthopädie, Charité-Universitätsmedizin Berlin, Berlin, Deutschland,
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Wongchai K, Schlotterer A, Lin J, Morcos M, Klein T, Hammes HP. Effects of linagliptin on glucose-induced neuronal damage on Caenorhabditis elegans. DIABETOL STOFFWECHS 2014. [DOI: 10.1055/s-0034-1375105] [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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Kern M, Klöting N, Grempler R, Mayoux E, Mark M, Klein T, Blüher M. A promising combination for future treatment of type 2 diabetes: Coadministration of empagliflozin (SGLT-2 inhibitor) with linagliptin (DPP-4 inhibitor). DIABETOL STOFFWECHS 2014. [DOI: 10.1055/s-0034-1374910] [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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Relling MV, McDonagh EM, Chang T, Caudle KE, McLeod HL, Haidar CE, Klein T, Luzzatto L. Clinical Pharmacogenetics Implementation Consortium (CPIC) guidelines for rasburicase therapy in the context of G6PD deficiency genotype. Clin Pharmacol Ther 2014; 96:169-74. [PMID: 24787449 DOI: 10.1038/clpt.2014.97] [Citation(s) in RCA: 97] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2014] [Accepted: 04/27/2014] [Indexed: 02/02/2023]
Abstract
Glucose-6-phosphate dehydrogenase (G6PD) deficiency is associated with development of acute hemolytic anemia (AHA) induced by a number of drugs. We provide guidance as to which G6PD genotypes are associated with G6PD deficiency in males and females. Rasburicase is contraindicated in G6PD-deficient patients due to the risk of AHA and possibly methemoglobinemia. Unless preemptive genotyping has established a positive diagnosis of G6PD deficiency, quantitative enzyme assay remains the mainstay of screening prior to rasburicase use. The purpose of this article is to help interpret the results of clinical G6PD genotype tests so that they can guide the use of rasburicase. Detailed guidelines on other aspects of the use of rasburicase, including analyses of cost-effectiveness, are beyond the scope of this document. Clinical Pharmacogenetics Implementation Consortium (CPIC) guidelines are published and updated periodically on https://www.pharmgkb.org/page/cpic to reflect new developments in the field.
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Affiliation(s)
- M V Relling
- Department of Pharmaceutical Sciences, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - E M McDonagh
- Department of Genetics, Stanford University, Stanford, California, USA
| | - T Chang
- Department of Oncology, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - K E Caudle
- Department of Pharmaceutical Sciences, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - H L McLeod
- Personalized Medicine Institute, Moffitt Cancer Center, Tampa, Florida, USA
| | - C E Haidar
- Department of Pharmaceutical Sciences, St. Jude Children's Research Hospital, Memphis, Tennessee, USA
| | - T Klein
- Department of Genetics, Stanford University, Stanford, California, USA
| | - L Luzzatto
- Department of Hematology, Istituto Toscano Tumori, Firenze, Italy
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Pera T, Zuidhof AB, Smit M, Menzen MH, Klein T, Flik G, Zaagsma J, Meurs H, Maarsingh H. Arginase inhibition prevents inflammation and remodeling in a guinea pig model of chronic obstructive pulmonary disease. J Pharmacol Exp Ther 2014; 349:229-38. [PMID: 24563530 DOI: 10.1124/jpet.113.210138] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Airway inflammation and remodeling are major features of chronic obstructive pulmonary disease (COPD), whereas pulmonary hypertension is a common comorbidity associated with a poor disease prognosis. Recent studies in animal models have indicated that increased arginase activity contributes to features of asthma, including allergen-induced airway eosinophilia and mucus hypersecretion. Although cigarette smoke and lipopolysaccharide (LPS), major risk factors for COPD, may increase arginase expression, the role of arginase in COPD is unknown. This study aimed to investigate the role of arginase in pulmonary inflammation and remodeling using an animal model of COPD. Guinea pigs were instilled intranasally with LPS or saline twice weekly for 12 weeks and pretreated by inhalation of the arginase inhibitor 2(S)-amino-6-boronohexanoic acid (ABH) or vehicle. Repeated LPS exposure increased lung arginase activity, resulting in increased l-ornithine/l-arginine and l-ornithine/l-citrulline ratios. Both ratios were reversed by ABH. ABH inhibited the LPS-induced increases in pulmonary IL-8, neutrophils, and goblet cells as well as airway fibrosis. Remarkably, LPS-induced right ventricular hypertrophy, indicative of pulmonary hypertension, was prevented by ABH. Strong correlations were found between arginase activity and inflammation, airway remodeling, and right ventricular hypertrophy. Increased arginase activity contributes to pulmonary inflammation, airway remodeling, and right ventricular hypertrophy in a guinea pig model of COPD, indicating therapeutic potential for arginase inhibitors in this disease.
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Affiliation(s)
- T Pera
- Department of Molecular Pharmacology, University of Groningen, Groningen, The Netherlands (T.P., A.B.Z., M.S., M.H.M., J.Z., H.Me., H.Ma.); and Brains On-Line BV, Groningen, The Netherlands (T.K., G.F.)
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Wang XY, Weng SY, Klein T, Kim YO, Schuppan D. Anti-inflammatory and direct antifibrotic effect of the oral hepatotropic DPP4 inhibitor Linagliptin in model of bilary fibrosis and NASH. Z Gastroenterol 2013. [DOI: 10.1055/s-0033-1352814] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Israeli M, Klein T, Herscovici C, Ram R, Shpilberg O, Sredni B, Yeshurun M. Cellular immune function monitoring after allogeneic haematopoietic cell transplantation: evaluation of a new assay. Clin Exp Immunol 2013; 172:475-82. [PMID: 23600836 DOI: 10.1111/cei.12072] [Citation(s) in RCA: 5] [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] [Accepted: 01/14/2013] [Indexed: 02/06/2023] Open
Abstract
Managing the patient's immune system after haematopoietic cell transplantation (HCT) is a challenge, mainly in the unstable period immediately after the transplant. Currently there is no standardized non-invasive diagnostic tool for the evaluation of immunological complications such as graft-versus-host disease (GVHD) and for managing the cellular immune function of the transplant recipient. The ImmuKnow assay for cellular immune function monitoring has been incorporated successfully into the clinical follow-up routine of solid organ transplant recipients. This study aims to explore the relevance and potential contribution of immune monitoring using the assay in the setting of HCT. We found that ImmuKnow-level measurement can distinguish between states of immune function quiescence and between events of acute GVHD. ImmuKnow levels were significantly higher in patients going through GVHD than the levels measured for the same patients during immunological stability. Moreover, we demonstrate a patient case where longitudinal monitoring using the ImmuKnow assay provided a trustworthy depiction of the patient's cellular immune function post-HCT. In conclusion, we provide evidence for the potential contribution of the ImmuKnow assay for longitudinal individualized cellular immune function monitoring of patients following HCT. Further studies are necessary in order to establish the optimal practice for utilizing the assay for this purpose.
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Affiliation(s)
- M Israeli
- Tissue Typing Laboratory, Rabin Medical Center, Petach-Tikva, Israel.
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Dietrich N, Busch S, Schwarz V, Klein T, Bierhaus A, Hammes HP. Der DPP-4-Inhibitor Linagliptin schützt bei experimentell induzierter diabetischer Retinopathie. DIABETOL STOFFWECHS 2013. [DOI: 10.1055/s-0033-1341908] [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: 10/26/2022]
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Alter ML, Von Websky K, Chaykovska L, Hohmann M, Tsuprykov O, Kutil B, Kraft R, Klein T, Hocher B. Langfristige Kombinationstherapie mit Linagliptin und Telmisartan bei Ratten mit Bluthochdruck: Effekt auf den Blutdruck und oxidativen Stress. DIABETOL STOFFWECHS 2013. [DOI: 10.1055/s-0033-1341876] [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: 10/26/2022]
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Sharkovska Y, Alter M, Reichetzeder C, Tsuprykov O, Klein T, Hocher B. Nierenschützende Effekte des DPP-4-Inhibitors Linagliptin bei db/db-Mäusen. DIABETOL STOFFWECHS 2013. [DOI: 10.1055/s-0033-1341909] [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: 10/26/2022]
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Jelsing J, Vrang N, Mark M, Mayoux E, Klein T. Der Natrium-Glukose-Cotransporter-2 (SGLT-2)-Inhibitor Empagliflozin hat eine dauerhafte Wirkung auf die Wiederherstellung der Glukose-Homöostase durch Erhalt der Beta-Zell-Masse in „Zucker Diabetic Fatty“ (ZDF)-Ratten. DIABETOL STOFFWECHS 2013. [DOI: 10.1055/s-0033-1341820] [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: 10/26/2022]
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Kern M, Klöting N, Mayoux E, Mark M, Klein T, Blüher M. Der Natrium-Glukose-Cotransporter-2 (SGLT-2)-Inhibitor Empagliflozin verbessert dosisabhängig die Insulinsensitivität bei db/db-Mäusen. DIABETOL STOFFWECHS 2013. [DOI: 10.1055/s-0033-1341819] [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: 10/26/2022]
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Darsalia V, Olverling A, Ortsäter H, Klein T, Sjöholm Å, Patrone C. Linagliptin reduces ischemic brain damage following stroke in a high-fat diet mouse model: A comparison to Glimepiride. DIABETOL STOFFWECHS 2013. [DOI: 10.1055/s-0033-1341717] [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: 10/26/2022]
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Klein T, Obrig H, Thöne-Otto A, Villringer A, Frisch S. Modulation aufmerksamkeitsrelatierter EEG Parameter durch Aufmerksamkeitstraining. KLIN NEUROPHYSIOL 2013. [DOI: 10.1055/s-0033-1337239] [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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