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Brenner D, Sieverding K, Srinidhi J, Zellner S, Secker C, Yilmaz R, Dyckow J, Amr S, Ponomarenko A, Tunaboylu E, Douahem Y, Schlag JS, Rodríguez Martínez L, Kislinger G, Niemann C, Nalbach K, Ruf WP, Uhl J, Hollenbeck J, Schirmer L, Catanese A, Lobsiger CS, Danzer KM, Yilmazer-Hanke D, Münch C, Koch P, Freischmidt A, Fetting M, Behrends C, Parlato R, Weishaupt JH. A TBK1 variant causes autophagolysosomal and motoneuron pathology without neuroinflammation in mice. J Exp Med 2024; 221:e20221190. [PMID: 38517332 PMCID: PMC10959724 DOI: 10.1084/jem.20221190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Revised: 05/05/2023] [Accepted: 02/16/2024] [Indexed: 03/23/2024] Open
Abstract
Heterozygous mutations in the TBK1 gene can cause amyotrophic lateral sclerosis (ALS) and frontotemporal dementia (FTD). The majority of TBK1-ALS/FTD patients carry deleterious loss-of-expression mutations, and it is still unclear which TBK1 function leads to neurodegeneration. We investigated the impact of the pathogenic TBK1 missense variant p.E696K, which does not abolish protein expression, but leads to a selective loss of TBK1 binding to the autophagy adaptor protein and TBK1 substrate optineurin. Using organelle-specific proteomics, we found that in a knock-in mouse model and human iPSC-derived motor neurons, the p.E696K mutation causes presymptomatic onset of autophagolysosomal dysfunction in neurons precipitating the accumulation of damaged lysosomes. This is followed by a progressive, age-dependent motor neuron disease. Contrary to the phenotype of mice with full Tbk1 knock-out, RIPK/TNF-α-dependent hepatic, neuronal necroptosis, and overt autoinflammation were not detected. Our in vivo results indicate autophagolysosomal dysfunction as a trigger for neurodegeneration and a promising therapeutic target in TBK1-ALS/FTD.
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Affiliation(s)
- David Brenner
- Division of Neurodegeneration, Department of Neurology, Medical Faculty Mannheim, Mannheim Center for Translational Neurosciences, Heidelberg University, Mannheim, Germany
- Department of Neurology, University of Ulm, Ulm, Germany
| | | | - Jahnavi Srinidhi
- Division of Neurodegeneration, Department of Neurology, Medical Faculty Mannheim, Mannheim Center for Translational Neurosciences, Heidelberg University, Mannheim, Germany
| | - Susanne Zellner
- Medical Faculty, Munich Cluster for Systems Neurology (SyNergy), Ludwig-Maximilians-University München, Munich, Germany
| | - Christopher Secker
- Neuroproteomics, Max Delbrück Center for Molecular Medicine, Berlin, Germany
- Department of Neurology and Experimental Neurology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Rüstem Yilmaz
- Division of Neurodegeneration, Department of Neurology, Medical Faculty Mannheim, Mannheim Center for Translational Neurosciences, Heidelberg University, Mannheim, Germany
| | - Julia Dyckow
- Division of Neuroimmunology, Department of Neurology, Medical Faculty Mannheim, Mannheim Center for Translational Neurosciences, Heidelberg University, Mannheim, Germany
| | - Shady Amr
- Faculty of Medicine, Institute of Biochemistry II, Goethe University Frankfurt, Frankfurt, Germany
| | - Anna Ponomarenko
- Department of Neurology, University of Ulm, Ulm, Germany
- Institute of Anatomy and Cell Biology, Ulm University School of Medicine, Ulm, Germany
| | - Esra Tunaboylu
- Department of Neurology, University of Ulm, Ulm, Germany
| | - Yasmin Douahem
- Division of Neurodegeneration, Department of Neurology, Medical Faculty Mannheim, Mannheim Center for Translational Neurosciences, Heidelberg University, Mannheim, Germany
| | - Joana S. Schlag
- Division of Neurodegeneration, Department of Neurology, Medical Faculty Mannheim, Mannheim Center for Translational Neurosciences, Heidelberg University, Mannheim, Germany
| | - Lucía Rodríguez Martínez
- Institute of Neuronal Cell Biology, Technical University Munich, Munich, Germany
- German Center for Neurodegenerative Diseases, Munich, Germany
| | - Georg Kislinger
- Electron Microscopy Hub, German Center for Neurodegenerative Diseases, Munich, Germany
| | - Cornelia Niemann
- Electron Microscopy Hub, German Center for Neurodegenerative Diseases, Munich, Germany
| | - Karsten Nalbach
- Medical Faculty, Munich Cluster for Systems Neurology (SyNergy), Ludwig-Maximilians-University München, Munich, Germany
| | | | - Jonathan Uhl
- Division of Neurodegeneration, Department of Neurology, Medical Faculty Mannheim, Mannheim Center for Translational Neurosciences, Heidelberg University, Mannheim, Germany
| | - Johanna Hollenbeck
- Division of Neurodegeneration, Department of Neurology, Medical Faculty Mannheim, Mannheim Center for Translational Neurosciences, Heidelberg University, Mannheim, Germany
| | - Lucas Schirmer
- Division of Neuroimmunology, Department of Neurology, Medical Faculty Mannheim, Mannheim Center for Translational Neurosciences, Heidelberg University, Mannheim, Germany
| | - Alberto Catanese
- Institute of Anatomy and Cell Biology, Ulm University School of Medicine, Ulm, Germany
| | - Christian S. Lobsiger
- Institut du Cerveau—Paris Brain Institute—Institut du Cerveau et de la Moelle épinière, Inserm, Centre National de la Recherche Scientifique, Assistance Publique–Hôpitaux de Paris, Hôpital de la Pitié-Salpêtrière, Sorbonne Université, Paris, France
| | - Karin M. Danzer
- Department of Neurology, University of Ulm, Ulm, Germany
- German Center for Neurodegenerative Diseases, Ulm, Germany
| | - Deniz Yilmazer-Hanke
- Department of Neurology, Clinical Neuroanatomy Unit, University of Ulm, Ulm, Germany
| | - Christian Münch
- Institute of Anatomy and Cell Biology, Ulm University School of Medicine, Ulm, Germany
| | - Philipp Koch
- University of Heidelberg/Medical Faculty Mannheim, Central Institute of Mental Health, Mannheim, Germany
- Hector Institute for Translational Brain Research, Mannheim, Germany
- German Cancer Research Center, Heidelberg, Germany
| | | | - Martina Fetting
- Medical Faculty, Munich Cluster for Systems Neurology (SyNergy), Ludwig-Maximilians-University München, Munich, Germany
- Electron Microscopy Hub, German Center for Neurodegenerative Diseases, Munich, Germany
| | - Christian Behrends
- Medical Faculty, Munich Cluster for Systems Neurology (SyNergy), Ludwig-Maximilians-University München, Munich, Germany
| | - Rosanna Parlato
- Division of Neurodegeneration, Department of Neurology, Medical Faculty Mannheim, Mannheim Center for Translational Neurosciences, Heidelberg University, Mannheim, Germany
| | - Jochen H. Weishaupt
- Division of Neurodegeneration, Department of Neurology, Medical Faculty Mannheim, Mannheim Center for Translational Neurosciences, Heidelberg University, Mannheim, Germany
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Bolgova L, Shypko A, Tuganova T, Alekseenko O, Smolanka I, Ponomarenko A, Bilko N. NEW DATA ON HISTOGENESIS AND HISTOLOGICAL STRUCTURE OF LUNG CANCER. Exp Oncol 2023; 45:62-69. [PMID: 37417281 DOI: 10.15407/exp-oncology.2023.01.062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Indexed: 07/08/2023]
Abstract
BACKGROUND Lung cancer (LC) is one of the most common malignant neoplasms in men around the world, which poses a number of important challenges for scientists. AIM To analyze the histogenesis, features of the histological structure, and growth of LC. MATERIALS AND METHODS The surgical material of 81 patients with LC was studied. Histological preparations were stained with hematoxylin and eosin (H&E) using the Papanicolaou method. Immunohistochemical reactions with monoclonals (Ki67, PCNA) were conducted. RESULTS In histological preparations of all LC types (squamous, adenocarcinoma, and small cell), along with solid growth, tumor growth in the alveoli was determined, which started from the basal membrane and grew toward the alveolus center, as evidenced by the morphological features of growth, tumor spread, and development of necrosis in the center. CONCLUSION In all the studied histological preparations of LC, tumor growth in the alveoli is noted, which is confirmed by structural and cellular signs and the nature of tumor decay in the alveolus center, which corresponds to the general patterns of development of malignant epithelial tumors.
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Affiliation(s)
- L Bolgova
- National Cancer Institute of the Ministry of Health of Ukraine, Kyiv 03022, Ukraine
| | - A Shypko
- National Cancer Institute of the Ministry of Health of Ukraine, Kyiv 03022, Ukraine
| | - T Tuganova
- National Cancer Institute of the Ministry of Health of Ukraine, Kyiv 03022, Ukraine
| | - O Alekseenko
- National Cancer Institute of the Ministry of Health of Ukraine, Kyiv 03022, Ukraine
| | - I Smolanka
- National Cancer Institute of the Ministry of Health of Ukraine, Kyiv 03022, Ukraine
| | - A Ponomarenko
- National University of "Kyiv-Mohyla Academy", Kyiv 04655, Ukraine
| | - N Bilko
- National University of "Kyiv-Mohyla Academy", Kyiv 04655, Ukraine
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Ponomarenko A, Yashin A, Kurskiev G, Minaev V, Petrov A, Petrov Y, Sakharov N, Zhiltsov N. First Results of the Implementation of the Doppler Backscattering Diagnostic for the Investigation of the Transition to H-Mode in the Spherical Tokamak Globus-M2. Sensors (Basel) 2023; 23:830. [PMID: 36679625 PMCID: PMC9865327 DOI: 10.3390/s23020830] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 12/24/2022] [Accepted: 01/09/2023] [Indexed: 06/17/2023]
Abstract
This paper presents the first results of a study of the LH transition on the new spherical Globus-M2 tokamak using the Doppler backscattering (DBS) diagnostic. New data characterizing the H-mode of discharges with higher values of the plasma parameters, such as magnetic field Bt up to 0.9 T and plasma current Ip up to 450 kA, were collected and analyzed. An upgraded neutral beam injection (NBI) system was used to initiate the LH transition. DBS allows the measurement of the poloidal rotation velocity and the turbulence amplitude of the plasma. The multi-frequency DBS system installed on Globus-M2 can simultaneously collect data in different areas spanning from the separatrix to the plasma core. This allowed for the radial profiles of the rotation velocity and electric field to be calculated before and after the LH transition. In addition, the values and temporal evolution of the velocity shear were obtained. The associated turbulence suppression after the transition to the H-mode was investigated using DBS.
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Affiliation(s)
- Anna Ponomarenko
- Plasma Physics Department, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia
| | - Alexander Yashin
- Plasma Physics Department, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia
- Plasma Research Laboratory, Ioffe Institute, 195251 St. Petersburg, Russia
| | - Gleb Kurskiev
- Plasma Research Laboratory, Ioffe Institute, 195251 St. Petersburg, Russia
| | - Vladimir Minaev
- Plasma Research Laboratory, Ioffe Institute, 195251 St. Petersburg, Russia
| | - Alexander Petrov
- Plasma Physics Department, Peter the Great St. Petersburg Polytechnic University, 195251 St. Petersburg, Russia
| | - Yuri Petrov
- Plasma Research Laboratory, Ioffe Institute, 195251 St. Petersburg, Russia
| | - Nikolay Sakharov
- Plasma Research Laboratory, Ioffe Institute, 195251 St. Petersburg, Russia
| | - Nikita Zhiltsov
- Plasma Research Laboratory, Ioffe Institute, 195251 St. Petersburg, Russia
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Yashin A, Teplova N, Zadvitskiy G, Ponomarenko A. Modelling of Backscattering off Filaments Using the Code IPF-FD3D for the Interpretation of Doppler Backscattering Data. Sensors (Basel) 2022; 22:9441. [PMID: 36502138 PMCID: PMC9735465 DOI: 10.3390/s22239441] [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] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Revised: 11/26/2022] [Accepted: 11/30/2022] [Indexed: 06/17/2023]
Abstract
Filaments or blobs are well known to strongly contribute to particle and energy losses both in L- and H-mode, making them an important plasma characteristic to investigate. They are plasma structures narrowly localized across a magnetic field and stretched along magnetic field lines. In toroidal devices, their development is observed to take place in the peripheral plasma. Filament characteristics have been studied extensively over the years using various diagnostic techniques. One such diagnostic is the Doppler backscattering (DBS) method employed at the spherical tokamak Globus-M/M2. It has been observed that the DBS signal reacts to the backscattering from filaments. However, the DBS data have proven difficult to analyze, which is why modelling was undertaken using the code IPF-FD3D to understand what kind of information can be extrapolated from the signals. A circular filament was thoroughly investigated in slab geometry with a variety of characteristics studied. Apart from that, the motion of the filaments in the poloidal and radial directions was analyzed. Additionally, other shapes of filaments were presented in this work. Modelling for the real geometry of the Globus-M/M2 tokamak was performed.
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Affiliation(s)
- Alexander Yashin
- Plasma Physics Department, Peter the Great Saint Petersburg Polytechnic University, 195251 Saint Petersburg, Russia
- Plasma Research Laboratory, Ioffe Institute, 195251 Saint Petersburg, Russia
| | - Natalia Teplova
- Plasma Physics Department, Peter the Great Saint Petersburg Polytechnic University, 195251 Saint Petersburg, Russia
- Plasma Research Laboratory, Ioffe Institute, 195251 Saint Petersburg, Russia
| | | | - Anna Ponomarenko
- Plasma Physics Department, Peter the Great Saint Petersburg Polytechnic University, 195251 Saint Petersburg, Russia
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Benimetskaya K, Mikheenko I, Ponomarenko A, Krivosheev Y, Ponomarev D, Losik D. A new clinical decision support system based on personalized evidence-based medicine in lipid lowering therapies. Atherosclerosis 2022. [DOI: 10.1016/j.atherosclerosis.2022.06.852] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Ponomarenko A, Korotieieva H, Anriichuk О. EVOLUTIONARY RELATIONSHIP OF UKRAINIAN ISOLATE OF ODONTOGLOSSUM RINGSPOT VIRUS. BTSNUKSB 2022. [DOI: 10.17721/1728.2748.2022.89.19-22] [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] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Odontoglossum ringspot virus (ORSV) is one of the most dangerous viruses of decorative orchids. Infection caused by this virus can reduce the phenotypic differences of orchids in collections, and as a result lead to their total exhaustion. In this study, the possible origin of the Ukrainian isolate of ORSV from the collection of O.V. Fomin Botanical Garden of the Taras Shevchenko National University of Kyiv was investigated. The properties of nucleotide sequences of the RNA-depended RNA-polymerase (RdRp) and coat protein gene of ORSV were examined. RNAs of ORSV isolated from leaves of Cymbidium hybridum from O.V. Fomin Botanical Garden’s collection were amplified through RT-PCR and sequenced. Obtained sequences were compared at the nucleotide level with ORSV isolates accessible within the GenBank. Phylogenetic examination appeared that the studied ORSV isolate may have a common root with a few South Korean isolates.
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Pokushalov E, Losik D, Kozlova S, Konradi A, Sekacheva M, Ponomarenko A, Krivosheev Y, Mikheenko I, Kretov E, Steinberg J. Association between personalized evidence-based anticoagulation therapy and outcomes at 1-year follow-up in patients with atrial fibrillation: an analysis from the Atrial Fibrillation registry. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.0550] [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: 11/13/2022] Open
Abstract
Abstract
Background
The guideline treatments based on a relatively broad set of enrollment criteria inhibits the personalized evidence-based approach. Personalized evidence-based medicine (EBM) involves the ability to classify individuals into subpopulations that differ in their susceptibility to a particular disease or their response to a specific treatment.
Objective
We report the 1-year follow-up data of the Atrial Fibrillation Registry, focusing on the relationship between personalized EBM and guideline-adherent anticoagulation therapy use and the occurrence of major clinical adverse events.
Methods
2683 patients at high risk for stroke and 1-year follow-up were enrolled in study. The primary endpoint was the percentage of guideline-based and personalized EBM recommendations acted on by clinicians. Secondary endpoints include the following: outcomes for all-cause mortality, thromboembolism (TE), bleeding, and the composite endpoints.
Results
From 2683 patients, 1971 (73.5%) EMR were guideline adherent and only 824 (30.7%) of them were personalized EBM anticoagulation therapy adherent, whilst 712 (26.5%) were non-guideline adherent and 1147 (42.8%) were guideline adherent but non-personalized EBM adherent.
The composite endpoint of cardiovascular death, any TE or bleeding was significantly lower in personalized EBM adherent patients during 1-year follow-up (P=0.02). The endpoint of all cause death and any TE is increased by >20% by guideline adherent but non-personalized EBM adherent treatment [hazard ratio (HR) 1.254 (95% CI 0.931; 1.689)] and >80% non-guideline adherent and non-personalized EBM adherent treatment [HR 1.892 (95% CI 1.359; 2.635)]. For the composite endpoint of cardiovascular death, any TE or bleeding, guideline adherent but non-personalized EBM adherent treatment increased risk by >40% [HR 1.454 (95% CI 1.037; 2.040)], and non-guideline adherent and non-personalized EBM adherent treatment by >110% [HR 2.113 (95% CI 1.453; 3.074)].
Conclusion
Personalized EBM anticoagulation management is associated with significantly better outcomes, including those related to the composite endpoint of cardiovascular death, any TE or bleeding in high-risk patients.
Funding Acknowledgement
Type of funding sources: None.
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Affiliation(s)
- E Pokushalov
- New medical technologies center, Novosibirsk, Russian Federation
| | - D Losik
- New medical technologies center, Novosibirsk, Russian Federation
| | - S Kozlova
- Almazov National Medical Research Centre, St Petersburg, Russian Federation
| | - A Konradi
- Almazov National Medical Research Centre, St Petersburg, Russian Federation
| | - M Sekacheva
- Sechenov University, Moscow, Russian Federation
| | - A Ponomarenko
- New medical technologies center, Novosibirsk, Russian Federation
| | - Y Krivosheev
- New medical technologies center, Novosibirsk, Russian Federation
| | - I Mikheenko
- New medical technologies center, Novosibirsk, Russian Federation
| | - E Kretov
- New medical technologies center, Novosibirsk, Russian Federation
| | - J.S Steinberg
- University of Rochester School of Medicine and Dentistry; The Valley Health System, New York, United States of America
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Romanov A, Chernyavskiy A, Lomivorotov V, Ponomarev D, Murtazin V, Orlov K, Kliver E, Shabanov V, Losik D, Mikheenko I, Ponomarenko A, Steinberg J. Temporary spinal cord stimulation to prevent postoperative atrial fibrillation after coronary surgery. First results of the feasibility study. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.0622] [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: 11/12/2022] Open
Abstract
Abstract
Background
Atrial fibrillation (AF) is the most common arrhythmia after cardiac surgery with typical appearance at early days after operation and leads to increase morbidity and mortality in the short and long term follow up. Spinal cord stimulation (SCS) was proven to be effective in chronic pain and intractable angina pectoris treatment. Recently, animal studies demonstrated that spinal cord stimulation could suppress AF and reduce AF burden.
Aim
To test safety and efficacy of the temporary SCS in early postoperative period in patients undergoing coronary artery bypass grafting
Methods
Fifteen patients (10 men, mean age 61±7.5 years) with indications for coronary artery bypass grafting (CABG) and history of paroxysmal AF underwent percutaneous lead placement for temporary SCS. Under local anesthesia and fluoroscopic guidance, the leads were placed at C7-Th4 level according to patient's sense of paresthesia and connected with spinal cord stimulator externally fixed on patient's chest. Temporary SCS was performed 3 days before CABG and turned off during surgery. At the end of CABG, the SCS was turned on in the intensive care unit and continued for 7 days. After that the temporary leads were removed. The primary safety objective was to test safety of the temporary SCS in early postoperative period, including 30 days occurrence of MACE (Death, stroke or TIA, myocardial infarction), acute spinal cord and kidney injury. The efficacy endpoint included occurrence of AF or any atrial tachyarrhythmias lasting ≥30 seconds during 30 days after surgery. All patients had continuous external ECG monitoring for 30 days after surgery.
Results
In all (100%) patients temporary leads for SCS were implanted successfully and standard on-pump elective CABG was performed thereafter. There were no any adverse events related to temporary SCS in either patient till the end of follow up. There were no significant differences in CK-MB and creatinine levels as compared with baseline data (p=0.2 and 0.3, respectively). No patients developed AF or atrial tachyarrhythmias during follow up according 30-days ECG monitoring.
Conclusions
The first results of the temporary spinal cord stimulation to prevent AF after coronary surgery demonstrated safety and efficacy of this therapy. The parallel group randomizes study is under way (NCT 03539354)
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- A Romanov
- E. Meshalkin National Medical Research Center of the Ministry of Health, Novosibirsk, Russian Federation
| | - A Chernyavskiy
- E. Meshalkin National Medical Research Center of the Ministry of Health, Novosibirsk, Russian Federation
| | - V Lomivorotov
- E. Meshalkin National Medical Research Center of the Ministry of Health, Novosibirsk, Russian Federation
| | - D Ponomarev
- E. Meshalkin National Medical Research Center of the Ministry of Health, Novosibirsk, Russian Federation
| | - V Murtazin
- E. Meshalkin National Medical Research Center of the Ministry of Health, Novosibirsk, Russian Federation
| | - K Orlov
- E. Meshalkin National Medical Research Center of the Ministry of Health, Novosibirsk, Russian Federation
| | - E Kliver
- E. Meshalkin National Medical Research Center of the Ministry of Health, Novosibirsk, Russian Federation
| | - V Shabanov
- E. Meshalkin National Medical Research Center of the Ministry of Health, Novosibirsk, Russian Federation
| | - D Losik
- E. Meshalkin National Medical Research Center of the Ministry of Health, Novosibirsk, Russian Federation
| | - I Mikheenko
- E. Meshalkin National Medical Research Center of the Ministry of Health, Novosibirsk, Russian Federation
| | - A Ponomarenko
- E. Meshalkin National Medical Research Center of the Ministry of Health, Novosibirsk, Russian Federation
| | - J.S Steinberg
- Heart Research Follow-up Program, University of Rochester School of Medicine & Dentistry, Rochester, United States of America
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Zayats Y, Ponomarenko A, Zaitsev S, Korneyko M, Lyakhova I, Khotimchenko Y, Bryukhovetskiy I. Migration of normal stem CD34 + cells to the brain in experimental models of ischemic stroke and glioblastoma. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx513.010] [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: 11/14/2022] Open
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Virot E, Ponomarenko A, Dehandschoewercker É, Quéré D, Clanet C. Reply to "Comment on 'Critical wind speed at which trees break' ". Phys Rev E 2016; 94:067002. [PMID: 28085428 DOI: 10.1103/physreve.94.067002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2016] [Indexed: 06/06/2023]
Abstract
In the preceding comment [A. Albrecht et al., Phys. Rev. E 94, 067001 (2016)10.1103/PhysRevE.94.067001], Albrecht et al. argue that important biomechanical ingredients are missing in our model about the wind speed at which trees break [Phys. Rev. E 93, 023001 (2016)10.1103/PhysRevE.93.023001]. Here we wish to emphasize that our model is an idealization, which primarily aims at evidencing the dominant ingredients of the problem. Since it captures both observed trends and orders of magnitude, we believe that the essential parameters in tree breakage have been identified, a useful step to make further progress and more detailed descriptions.
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Affiliation(s)
- E Virot
- LadHyX, CNRS UMR 7646, École Polytechnique, 91128 Palaiseau, France
| | - A Ponomarenko
- LadHyX, CNRS UMR 7646, École Polytechnique, 91128 Palaiseau, France
- PMMH, CNRS UMR 7636, ESPCI-Paris, 10 rue Vauquelin, 75005 Paris, France
| | - É Dehandschoewercker
- LadHyX, CNRS UMR 7646, École Polytechnique, 91128 Palaiseau, France
- PMMH, CNRS UMR 7636, ESPCI-Paris, 10 rue Vauquelin, 75005 Paris, France
| | - D Quéré
- LadHyX, CNRS UMR 7646, École Polytechnique, 91128 Palaiseau, France
- PMMH, CNRS UMR 7636, ESPCI-Paris, 10 rue Vauquelin, 75005 Paris, France
| | - C Clanet
- LadHyX, CNRS UMR 7646, École Polytechnique, 91128 Palaiseau, France
- PMMH, CNRS UMR 7636, ESPCI-Paris, 10 rue Vauquelin, 75005 Paris, France
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Virot E, Ponomarenko A, Dehandschoewercker É, Quéré D, Clanet C. Publisher's Note: Critical wind speed at which trees break [Phys. Rev. E 93, 023001 (2016)]. Phys Rev E 2016; 94:059907. [PMID: 27967117 DOI: 10.1103/physreve.94.059907] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Indexed: 11/07/2022]
Abstract
This corrects the article DOI: 10.1103/PhysRevE.93.023001.
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Abstract
Data from storms suggest that the critical wind speed at which trees break is constant (≃42m/s), regardless of tree characteristics. We question the physical origin of this observation both experimentally and theoretically. By combining Hooke's law, Griffith's criterion, and tree allometry, we show that the critical wind speed indeed hardly depends on the height, diameter, and elastic properties of trees.
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Affiliation(s)
- E Virot
- LadHyX, CNRS UMR 7646, École Polytechnique, 91128 Palaiseau, France
| | - A Ponomarenko
- LadHyX, CNRS UMR 7646, École Polytechnique, 91128 Palaiseau, France.,PMMH, CNRS UMR 7636, ESPCI, 10 rue Vauquelin, 75005 Paris, France
| | - É Dehandschoewercker
- LadHyX, CNRS UMR 7646, École Polytechnique, 91128 Palaiseau, France.,PMMH, CNRS UMR 7636, ESPCI, 10 rue Vauquelin, 75005 Paris, France
| | - D Quéré
- LadHyX, CNRS UMR 7646, École Polytechnique, 91128 Palaiseau, France.,PMMH, CNRS UMR 7636, ESPCI, 10 rue Vauquelin, 75005 Paris, France
| | - C Clanet
- LadHyX, CNRS UMR 7646, École Polytechnique, 91128 Palaiseau, France.,PMMH, CNRS UMR 7636, ESPCI, 10 rue Vauquelin, 75005 Paris, France
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Ponomarenko A, Vincent O, Pietriga A, Cochard H, Badel É, Marmottant P. Ultrasonic emissions reveal individual cavitation bubbles in water-stressed wood. J R Soc Interface 2015; 11:rsif.2014.0480. [PMID: 25056212 DOI: 10.1098/rsif.2014.0480] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Under drought conditions, the xylem of trees that conducts ascending sap produces ultrasonic emissions whose exact origin is not clear. We introduce a new method to record simultaneously both acoustic events and optical observation of the xylem conduits within slices of wood that were embedded in a transparent material setting a hydric stress. In this article, we resolved the rapid development of all cavitation bubbles and demonstrated that each ultrasound emission was linked to the nucleation of one single bubble, whose acoustic energy is an increasing function of the size of the conduit where nucleation occurred and also of the hydric stress. We modelled these observations by the fact that water columns in conduits store elastic energy and release it into acoustic waves when they are broken by cavitation bubbles. Water columns are thus elastic, and not rigid, 'wires of water' set under tension by hydric stresses. Cavitation bubbles are at the origin of an embolism, whose development was followed in our experiments. Such an embolism of sap circulation can result in a fatal condition for living trees. These findings provide new insights for the non-destructive monitoring of embolisms within trees, and suggest a new approach to study porous media under hydric stress.
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Affiliation(s)
- A Ponomarenko
- Laboratoire Interdisciplinaire de Physique, LIPhy, CNRS et Université de Grenoble, Grenoble Cedex, France
| | - O Vincent
- Laboratoire Interdisciplinaire de Physique, LIPhy, CNRS et Université de Grenoble, Grenoble Cedex, France
| | - A Pietriga
- Laboratoire Interdisciplinaire de Physique, LIPhy, CNRS et Université de Grenoble, Grenoble Cedex, France
| | - H Cochard
- INRA, UMR 547 PIAF, 63100 Clermont-Ferrand, France Clermont Université, Université Blaise Pascal, UMR 547 PIAF, 63177, Aubière, France
| | - É Badel
- INRA, UMR 547 PIAF, 63100 Clermont-Ferrand, France Clermont Université, Université Blaise Pascal, UMR 547 PIAF, 63177, Aubière, France
| | - P Marmottant
- Laboratoire Interdisciplinaire de Physique, LIPhy, CNRS et Université de Grenoble, Grenoble Cedex, France
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Ponomarenko A, Brylev V, Nozhevnikova E, Korshun V. Recent Advances in Self-Assembled Fluorescent DNA Structures and Probes. Curr Top Med Chem 2015; 15:1162-78. [DOI: 10.2174/1568026615666150330110131] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Revised: 12/12/2014] [Accepted: 12/31/2014] [Indexed: 11/22/2022]
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Knoche A, Yokoyama H, Ponomarenko A, Frisch C, Huston J, Haas HL. High-frequency oscillation in the hippocampus of the behaving rat and its modulation by the histaminergic system. Hippocampus 2003; 13:273-80. [PMID: 12699334 DOI: 10.1002/hipo.10057] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The histaminergic neurons located in the posterior hypothalamus modulate whole brain activity in a manner dependent on behavioral state. We have investigated their influence on high-frequency oscillation (200-Hz ripples) in the hippocampal CA1 region of freely moving rats. The occurrence of these ripples, assumed to be involved in memory trace formation, was markedly enhanced after injection of the H1-antagonists pyrilamine and ketotifen in a lateral ventricle, indicating a tonic activity of the histaminergic system. The H2- and H3-antagonists cimetidine and thioperamide were ineffective. We suggest a mediation of these effects through blocking the known histaminergic excitation of septal neurons. Histamine administered by the intracerebroventricular route had an inhibitory action on ripples. H1-receptor activation, which has been shown to inhibit learning and memory, thus shifts hippocampal activity away from high-frequency oscillation toward theta activity.
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Affiliation(s)
- A Knoche
- Heinrich Heine University, Düsseldorf, Germany
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Ponomarenko A. The practical value of the antiinfluenza antibodies electrokinetic potential determination. Immunol Lett 1997. [DOI: 10.1016/s0165-2478(97)88067-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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