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Mouskeftara T, Deda O, Papadopoulos G, Chatzigeorgiou A, Gika H. Lipidomic Analysis of Liver and Adipose Tissue in a High-Fat Diet-Induced Non-Alcoholic Fatty Liver Disease Mice Model Reveals Alterations in Lipid Metabolism by Weight Loss and Aerobic Exercise. Molecules 2024; 29:1494. [PMID: 38611773 PMCID: PMC11013466 DOI: 10.3390/molecules29071494] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 03/11/2024] [Accepted: 03/12/2024] [Indexed: 04/14/2024] Open
Abstract
Detailed investigation of the lipidome remodeling upon normal weight conditions, obesity, or weight loss, as well as the influence of physical activity, can help to understand the mechanisms underlying dyslipidemia in metabolic conditions correlated to the emergence and progression of non-alcoholic fatty liver disease (NAFLD). C57BL/6 male mice were fed a normal diet (ND) or a high-fat diet (HFD) for 20 weeks. Subgroups within the high-fat diet (HFD) group underwent different interventions: some engaged in exercise (HFDex), others were subjected to weight loss (WL) by changing from the HFD to ND, and some underwent a combination of weight loss and exercise (WLex) during the final 8 weeks of the 20-week feeding period. To support our understanding, not only tissue-specific lipid remodeling mechanisms but also the cross-talk between different tissues and their impact on the systemic regulation of lipid metabolism are essential. Exercise and weight loss-induced specific adaptations in the liver and visceral adipose tissue lipidomes of mice were explored by the UPLC-TOF-MS/MS untargeted lipidomics methodology. Lipidomic signatures of ND and HFD-fed mice undergoing weight loss were compared with animals with and without physical exercise. Several lipid classes were identified as contributing factors in the discrimination of the groups by multivariate analysis models, such as glycerolipids, glycerophospholipids, sphingolipids, and fatty acids, with respect to liver samples, whereas triglycerides were the only lipid class identified in visceral adipose tissue. Lipids found to be dysregulated in HFD animals are related to well-established pathways involved in the biosynthesis of PC, PE, and TG metabolism. These show a reversing trend back to basic levels of ND when animals change to a normal diet after 12 weeks, whereas the impact of exercise, though in some cases it slightly enhances the reversing trend, is not clear.
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Affiliation(s)
- Thomai Mouskeftara
- Laboratory of Forensic Medicine & Toxicology, Department of Medicine, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (T.M.); (O.D.)
- Biomic AUTh, Center for Interdisciplinary Research and Innovation (CIRI-AUTH), Balkan Center B1.4, 10th km Thessaloniki-Thermi Rd, P.O. Box 8318, 57001 Thessaloniki, Greece
| | - Olga Deda
- Laboratory of Forensic Medicine & Toxicology, Department of Medicine, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (T.M.); (O.D.)
- Biomic AUTh, Center for Interdisciplinary Research and Innovation (CIRI-AUTH), Balkan Center B1.4, 10th km Thessaloniki-Thermi Rd, P.O. Box 8318, 57001 Thessaloniki, Greece
| | - Grigorios Papadopoulos
- Department of Physiology, Medical School, National and Kapodistrian University of Athens, 75 Mikras Asias Str., 11527 Athens, Greece; (G.P.); (A.C.)
| | - Antonios Chatzigeorgiou
- Department of Physiology, Medical School, National and Kapodistrian University of Athens, 75 Mikras Asias Str., 11527 Athens, Greece; (G.P.); (A.C.)
| | - Helen Gika
- Laboratory of Forensic Medicine & Toxicology, Department of Medicine, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; (T.M.); (O.D.)
- Biomic AUTh, Center for Interdisciplinary Research and Innovation (CIRI-AUTH), Balkan Center B1.4, 10th km Thessaloniki-Thermi Rd, P.O. Box 8318, 57001 Thessaloniki, Greece
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Arnquist I, Avalos N, Baxter D, Bertou X, Castelló-Mor N, Chavarria AE, Cuevas-Zepeda J, Gutiérrez JC, Duarte-Campderros J, Dastgheibi-Fard A, Deligny O, De Dominicis C, Estrada E, Gadola N, Gaïor R, Hossbach T, Iddir L, Khalil L, Kilminster B, Lantero-Barreda A, Lawson I, Lee S, Letessier-Selvon A, Loaiza P, Lopez-Virto A, Matalon A, Munagavalasa S, McGuire KJ, Mitra P, Norcini D, Papadopoulos G, Paul S, Piers A, Privitera P, Ramanathan K, Robmann P, Settimo M, Smida R, Thomas R, Traina M, Vila I, Vilar R, Warot G, Yajur R, Zopounidis JP. First Constraints from DAMIC-M on Sub-GeV Dark-Matter Particles Interacting with Electrons. Phys Rev Lett 2023; 130:171003. [PMID: 37172255 DOI: 10.1103/physrevlett.130.171003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Accepted: 03/21/2023] [Indexed: 05/14/2023]
Abstract
We report constraints on sub-GeV dark matter particles interacting with electrons from the first underground operation of DAMIC-M detectors. The search is performed with an integrated exposure of 85.23 g days, and exploits the subelectron charge resolution and low level of dark current of DAMIC-M charge-coupled devices (CCDs). Dark-matter-induced ionization signals above the detector dark current are searched for in CCD pixels with charge up to 7e^{-}. With this dataset we place limits on dark matter particles of mass between 0.53 and 1000 MeV/c^{2}, excluding unexplored regions of parameter space in the mass ranges [1.6,1000] MeV/c^{2} and [1.5,15.1] MeV/c^{2} for ultralight and heavy mediator interactions, respectively.
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Affiliation(s)
- I Arnquist
- Pacific Northwest National Laboratory (PNNL), Richland, Washington, USA
| | - N Avalos
- Centro Atómico Bariloche and Instituto Balseiro, Comisión Nacional de Energía Atómica (CNEA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional de Cuyo (UNCUYO), San Carlos de Bariloche 8400, Argentina
| | - D Baxter
- Kavli Institute for Cosmological Physics and The Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637, USA
| | - X Bertou
- Centro Atómico Bariloche and Instituto Balseiro, Comisión Nacional de Energía Atómica (CNEA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional de Cuyo (UNCUYO), San Carlos de Bariloche 8400, Argentina
| | - N Castelló-Mor
- Instituto de Física de Cantabria (IFCA), CSIC-Universidad de Cantabria, Santander 39005, Spain
| | - A E Chavarria
- Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA
| | - J Cuevas-Zepeda
- Kavli Institute for Cosmological Physics and The Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637, USA
| | | | - J Duarte-Campderros
- Instituto de Física de Cantabria (IFCA), CSIC-Universidad de Cantabria, Santander 39005, Spain
| | - A Dastgheibi-Fard
- LPSC LSM, CNRS/IN2P3, Université Grenoble-Alpes, Grenoble 38026, France
| | - O Deligny
- CNRS/IN2P3, IJCLab, Université Paris-Saclay, Orsay 91405, France
| | - C De Dominicis
- Laboratoire de physique nucléaire et des hautes énergies (LPNHE), Sorbonne Université, Université Paris Cité, CNRS/IN2P3, Paris 75005, France
- SUBATECH, Nantes Université, IMT Atlantique, CNRS-IN2P3, Nantes 44300, France
| | - E Estrada
- Centro Atómico Bariloche and Instituto Balseiro, Comisión Nacional de Energía Atómica (CNEA), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional de Cuyo (UNCUYO), San Carlos de Bariloche 8400, Argentina
| | - N Gadola
- Universität Zürich Physik Institut, Zürich 8057, Switzerland
| | - R Gaïor
- Laboratoire de physique nucléaire et des hautes énergies (LPNHE), Sorbonne Université, Université Paris Cité, CNRS/IN2P3, Paris 75005, France
| | - T Hossbach
- Pacific Northwest National Laboratory (PNNL), Richland, Washington, USA
| | - L Iddir
- Laboratoire de physique nucléaire et des hautes énergies (LPNHE), Sorbonne Université, Université Paris Cité, CNRS/IN2P3, Paris 75005, France
| | - L Khalil
- Laboratoire de physique nucléaire et des hautes énergies (LPNHE), Sorbonne Université, Université Paris Cité, CNRS/IN2P3, Paris 75005, France
| | - B Kilminster
- Universität Zürich Physik Institut, Zürich 8057, Switzerland
| | - A Lantero-Barreda
- Instituto de Física de Cantabria (IFCA), CSIC-Universidad de Cantabria, Santander 39005, Spain
| | - I Lawson
- SNOLAB, Lively, Ontario P341N2, Canada
| | - S Lee
- Universität Zürich Physik Institut, Zürich 8057, Switzerland
| | - A Letessier-Selvon
- Laboratoire de physique nucléaire et des hautes énergies (LPNHE), Sorbonne Université, Université Paris Cité, CNRS/IN2P3, Paris 75005, France
| | - P Loaiza
- CNRS/IN2P3, IJCLab, Université Paris-Saclay, Orsay 91405, France
| | - A Lopez-Virto
- Instituto de Física de Cantabria (IFCA), CSIC-Universidad de Cantabria, Santander 39005, Spain
| | - A Matalon
- Kavli Institute for Cosmological Physics and The Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637, USA
- Laboratoire de physique nucléaire et des hautes énergies (LPNHE), Sorbonne Université, Université Paris Cité, CNRS/IN2P3, Paris 75005, France
| | - S Munagavalasa
- Kavli Institute for Cosmological Physics and The Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637, USA
| | - K J McGuire
- Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA
| | - P Mitra
- Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA
| | - D Norcini
- Kavli Institute for Cosmological Physics and The Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637, USA
| | - G Papadopoulos
- Laboratoire de physique nucléaire et des hautes énergies (LPNHE), Sorbonne Université, Université Paris Cité, CNRS/IN2P3, Paris 75005, France
| | - S Paul
- Kavli Institute for Cosmological Physics and The Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637, USA
| | - A Piers
- Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA
| | - P Privitera
- Kavli Institute for Cosmological Physics and The Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637, USA
- Laboratoire de physique nucléaire et des hautes énergies (LPNHE), Sorbonne Université, Université Paris Cité, CNRS/IN2P3, Paris 75005, France
| | - K Ramanathan
- Kavli Institute for Cosmological Physics and The Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637, USA
| | - P Robmann
- Universität Zürich Physik Institut, Zürich 8057, Switzerland
| | - M Settimo
- SUBATECH, Nantes Université, IMT Atlantique, CNRS-IN2P3, Nantes 44300, France
| | - R Smida
- Kavli Institute for Cosmological Physics and The Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637, USA
| | - R Thomas
- Kavli Institute for Cosmological Physics and The Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637, USA
| | - M Traina
- Center for Experimental Nuclear Physics and Astrophysics, University of Washington, Seattle, Washington 98195, USA
- Laboratoire de physique nucléaire et des hautes énergies (LPNHE), Sorbonne Université, Université Paris Cité, CNRS/IN2P3, Paris 75005, France
| | - I Vila
- Instituto de Física de Cantabria (IFCA), CSIC-Universidad de Cantabria, Santander 39005, Spain
| | - R Vilar
- Instituto de Física de Cantabria (IFCA), CSIC-Universidad de Cantabria, Santander 39005, Spain
| | - G Warot
- LPSC LSM, CNRS/IN2P3, Université Grenoble-Alpes, Grenoble 38026, France
| | - R Yajur
- Kavli Institute for Cosmological Physics and The Enrico Fermi Institute, The University of Chicago, Chicago, Illinois 60637, USA
| | - J-P Zopounidis
- Laboratoire de physique nucléaire et des hautes énergies (LPNHE), Sorbonne Université, Université Paris Cité, CNRS/IN2P3, Paris 75005, France
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Varvaras D, Frusone F, Sachoulidou A, Tardioli S, D’Onofrio S, Papadopoulos G, Al Lawati T, De Felice V, La Barbera L, Nina H. P242 Use of Acellular Pericardial Biological Mesh for Prepectoral and Dual Plane Prosthetic Breast Reconstruction Following Conservative Mastectomies. Breast 2023. [DOI: 10.1016/s0960-9776(23)00360-0] [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: 03/15/2023] Open
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Varvaras D, Sachoulidou A, De Felice V, Frusone F, Papadopoulos G, Tardioli S, D’Onofrio S, Al Lawati T, Nina H. P241 Skin reducing mastectomy and immediate hybrid breast reconstruction using combination of acellular pericardium matrix and deepithelialized dermal flap in patients with hypertrophic and ptotic breasts. Breast 2023. [DOI: 10.1016/s0960-9776(23)00359-4] [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: 03/16/2023] Open
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Papadopoulos G, Legaki AI, Georgila K, Vorkas P, Giannousi E, Stamatakis G, Moustakas II, Petrocheilou M, Pyrina I, Gercken B, Kassi E, Chavakis T, Pateras IS, Panayotou G, Gika H, Samiotaki M, Eliopoulos AG, Chatzigeorgiou A. Integrated omics analysis for characterization of the contribution of high fructose corn syrup to non-alcoholic fatty liver disease in obesity. Metabolism 2023; 144:155552. [PMID: 36996933 DOI: 10.1016/j.metabol.2023.155552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 03/17/2023] [Accepted: 03/18/2023] [Indexed: 04/01/2023]
Abstract
BACKGROUND High-Fructose Corn Syrup (HFCS), a sweetener rich in glucose and fructose, is nowadays widely used in beverages and processed foods; its consumption has been correlated to the emergence and progression of Non-Alcoholic Fatty Liver Disease (NAFLD). Nevertheless, the molecular mechanisms by which HFCS impacts hepatic metabolism remain scarce, especially in the context of obesity. Besides, the majority of current studies focuses either on the detrimental role of fructose in hepatic steatosis or compare separately the additive impact of fructose versus glucose in high fat diet-induced NAFLD. AIM By engaging combined omics approaches, we sought to characterize the role of HFCS in obesity-associated NAFLD and reveal molecular processes, which mediate the exaggeration of steatosis under these conditions. METHODS Herein, C57BL/6 mice were fed a normal-fat-diet (ND), a high-fat-diet (HFD) or a HFD supplemented with HFCS (HFD-HFCS) and upon examination of their metabolic and NAFLD phenotype, proteomic, lipidomic and metabolomic analyses were conducted to identify HFCS-related molecular alterations of the hepatic metabolic landscape in obesity. RESULTS Although HFD and HFD-HFCS mice displayed comparable obesity, HFD-HFCS mice showed aggravation of hepatic steatosis, as analysis of the lipid droplet area in liver sections revealed (12,15 % of total section area in HFD vs 22,35 % in HFD-HFCS), increased NAFLD activity score (3,29 in HFD vs 4,86 in HFD-HFCS) and deteriorated hepatic insulin resistance, as compared to the HFD mice. Besides, the hepatic proteome of HFD-HFCS mice was characterized by a marked upregulation of 5 core proteins implicated in de novo lipogenesis (DNL), while an increased phosphatidyl-cholines(PC)/phosphatidyl-ethanolamines(PE) ratio (2.01 in HFD vs 3.04 in HFD-HFCS) was observed in the livers of HFD-HFCS versus HFD mice. Integrated analysis of the omics datasets indicated that Tricarboxylic Acid (TCA) cycle overactivation is likely contributing towards the intensification of steatosis during HFD-HFCS-induced NAFLD. CONCLUSION Our results imply that HFCS significantly contributes to steatosis aggravation during obesity-related NAFLD, likely deriving from DNL upregulation, accompanied by TCA cycle overactivation and deteriorated hepatic insulin resistance.
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Affiliation(s)
- Grigorios Papadopoulos
- Department of Physiology, Medical School, National and Kapodistrian University of Athens, 75 Mikras Asias Str., 11527 Athens, Greece
| | - Aigli-Ioanna Legaki
- Department of Physiology, Medical School, National and Kapodistrian University of Athens, 75 Mikras Asias Str., 11527 Athens, Greece
| | - Konstantina Georgila
- Department of Biology, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Panagiotis Vorkas
- Institute of Applied Biosciences, Centre for Research and Technology, 57001, Thermi, Thessaloniki, Greece
| | - Eirini Giannousi
- Department of Physiology, Medical School, National and Kapodistrian University of Athens, 75 Mikras Asias Str., 11527 Athens, Greece
| | - George Stamatakis
- Institute for Bio-innovation, Biomedical Sciences Research Center "Alexander Fleming", Vari 16672, Greece
| | - Ioannis I Moustakas
- Department of Physiology, Medical School, National and Kapodistrian University of Athens, 75 Mikras Asias Str., 11527 Athens, Greece
| | - Maria Petrocheilou
- School of Medicine, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; Biomic AUTh, Center for Interdisciplinary Research and Innovation (CIRI-AUTH), 57001, Thermi, Thessaloniki, Greece
| | - Iryna Pyrina
- Institute for Clinical Chemistry and Laboratory Medicine, University Clinic Carl Gustav Carus, Technische Universität Dresden, Fetscherstrasse 74, 01307 Dresden, Germany
| | - Bettina Gercken
- Institute for Clinical Chemistry and Laboratory Medicine, University Clinic Carl Gustav Carus, Technische Universität Dresden, Fetscherstrasse 74, 01307 Dresden, Germany
| | - Eva Kassi
- Department of Biological Chemistry, Medical School, National and Kapodistrian University of Athens, 75 Mikras Asias Str., 11527 Athens, Greece
| | - Triantafyllos Chavakis
- Institute for Clinical Chemistry and Laboratory Medicine, University Clinic Carl Gustav Carus, Technische Universität Dresden, Fetscherstrasse 74, 01307 Dresden, Germany
| | - Ioannis S Pateras
- 2nd Department of Pathology, "Attikon" University Hospital, Medical School, National and Kapodistrian University of Athens, 12462 Athens, Greece
| | - George Panayotou
- Institute for Bio-innovation, Biomedical Sciences Research Center "Alexander Fleming", Vari 16672, Greece
| | - Helen Gika
- School of Medicine, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece; Biomic AUTh, Center for Interdisciplinary Research and Innovation (CIRI-AUTH), 57001, Thermi, Thessaloniki, Greece
| | - Martina Samiotaki
- Institute for Bio-innovation, Biomedical Sciences Research Center "Alexander Fleming", Vari 16672, Greece
| | - Aristides G Eliopoulos
- Department of Biology, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece; Center of Basic Research, Biomedical Research Foundation of the Academy of Athens, Athens, Greece; Center for New Biotechnologies and Precision Medicine, School of Medicine, National and Kapodistrian University of Athens, Athens, Greece
| | - Antonios Chatzigeorgiou
- Department of Physiology, Medical School, National and Kapodistrian University of Athens, 75 Mikras Asias Str., 11527 Athens, Greece; Institute for Clinical Chemistry and Laboratory Medicine, University Clinic Carl Gustav Carus, Technische Universität Dresden, Fetscherstrasse 74, 01307 Dresden, Germany.
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Fragkoulis C, Fragkiadis E, Sakellakis M, Pinitas A, Tzannis K, Gavalas N, Stamatakos P, Leventi A, Papadopoulos G, Stathouros G, Kostopoulou A, Makrydaki D, Giannopoulou E, Marialena D, Stravodimos K, Choreftaki T, Bamias A, Ntoumas K, Papatsoris A. Intravesical administration of durvalumab to patients with high risk non muscle invasive bladder cancer after BCG failure. A phase II trial by the Hellenic GU Cancer Group. Eur Urol 2023. [DOI: 10.1016/s0302-2838(23)00467-0] [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: 02/12/2023]
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Fragkoulis C, Glykas I, Tzelves L, Stamatakos P, Papadopoulos G, Stathouros G, Dellis A, Ntoumas K, Dimitriadi A, Kostopoulou A, Papatsoris A. Clinical impact of ERG and PTEN alterations in men underwent radical prostatectomy. EUR UROL SUPPL 2022. [DOI: 10.1016/s2666-1683(22)02496-x] [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: 11/11/2022] Open
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Legaki AI, Moustakas II, Sikorska M, Papadopoulos G, Velliou RI, Chatzigeorgiou A. Hepatocyte Mitochondrial Dynamics and Bioenergetics in Obesity-Related Non-Alcoholic Fatty Liver Disease. Curr Obes Rep 2022; 11:126-143. [PMID: 35501558 PMCID: PMC9399061 DOI: 10.1007/s13679-022-00473-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/26/2022] [Indexed: 02/07/2023]
Abstract
PURPOSE OF THE REVIEW Mitochondrial dysfunction has long been proposed to play a crucial role in the pathogenesis of a considerable number of disorders, such as neurodegeneration, cancer, cardiovascular, and metabolic disorders, including obesity-related insulin resistance and non-alcoholic fatty liver disease (NAFLD). Mitochondria are highly dynamic organelles that undergo functional and structural adaptations to meet the metabolic requirements of the cell. Alterations in nutrient availability or cellular energy needs can modify their formation through biogenesis and the opposite processes of fission and fusion, the fragmentation, and connection of mitochondrial network areas respectively. Herein, we review and discuss the current literature on the significance of mitochondrial adaptations in obesity and metabolic dysregulation, emphasizing on the role of hepatocyte mitochondrial flexibility in obesity and NAFLD. RECENT FINDINGS Accumulating evidence suggests the involvement of mitochondrial morphology and bioenergetics dysregulations to the emergence of NAFLD and its progress to non-alcoholic steatohepatitis (NASH). Most relevant data suggests that changes in liver mitochondrial dynamics and bioenergetics hold a key role in the pathogenesis of NAFLD. During obesity and NAFLD, oxidative stress occurs due to the excessive production of ROS, leading to mitochondrial dysfunction. As a result, mitochondria become incompetent and uncoupled from respiratory chain activities, further promoting hepatic fat accumulation, while leading to liver inflammation, insulin resistance, and disease's deterioration. Elucidation of the mechanisms leading to dysfunctional mitochondrial activity of the hepatocytes during NAFLD is of predominant importance for the development of novel therapeutic approaches towards the treatment of this metabolic disorder.
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Affiliation(s)
- Aigli-Ioanna Legaki
- Department of Physiology, Medical School, National and Kapodistrian University of Athens, 75 Mikras Asias Str, 11527 Athens, Greece
| | - Ioannis I. Moustakas
- Department of Physiology, Medical School, National and Kapodistrian University of Athens, 75 Mikras Asias Str, 11527 Athens, Greece
| | - Michalina Sikorska
- Department of Physiology, Medical School, National and Kapodistrian University of Athens, 75 Mikras Asias Str, 11527 Athens, Greece
| | - Grigorios Papadopoulos
- Department of Physiology, Medical School, National and Kapodistrian University of Athens, 75 Mikras Asias Str, 11527 Athens, Greece
| | - Rallia-Iliana Velliou
- Department of Physiology, Medical School, National and Kapodistrian University of Athens, 75 Mikras Asias Str, 11527 Athens, Greece
| | - Antonios Chatzigeorgiou
- Department of Physiology, Medical School, National and Kapodistrian University of Athens, 75 Mikras Asias Str, 11527 Athens, Greece
- Institute for Clinical Chemistry and Laboratory Medicine, University Clinic Carl Gustav Carus, Technische Universität Dresden, Fetscherstrasse 74, 01307 Dresden, Germany
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Moschotzopoulos D, Stamatakos P, Leventi A, Paizis T, Mari V, Kaoullas A, Fragkoulis C, Papadopoulos G, Stathouros G, Ntoumas K. Platelet Rich Plasma (PRP) infusion during nerve-sparing radical prostatectomy: Can it enhance the post-operative sexual potency of the patient? EUR UROL SUPPL 2022. [DOI: 10.1016/s2666-1683(22)00220-8] [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] Open
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Fragkoulis C, Glykas I, Moschotzopoulos D, Lamprou S, Kaoullas A, Leventi A, Gravanis M, Karydas G, Stathouros G, Papadopoulos G, Ntoumas K. Conservative management of grade 4 and 5 renal injuries. Eur Urol 2021. [DOI: 10.1016/s0302-2838(21)01253-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Varvaras D, Lo Schiavo M, De Felice V, Tardioli S, Papadopoulos G, Trobbiani G, Madaio R, Nina H, Al Lawati T. Pre-pectoral breast reconstruction and complete implant coverage with a new bovine acellular pericardium matrix: Breast Center Villa Tiberia Hospital experience. Breast 2021. [DOI: 10.1016/s0960-9776(21)00237-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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Marketou M, Papadopoulos G, Kontopodis N, Patrianakos A, Nakou H, Maragkoudakis S, Plevritaki A, Alevizaki A, Vardas P, Ioannou C, Parthenakis F. Left ventricular global longitudinal peak strain deterioration in patients undergoing endovascular repair of abdominal aortic aneurysms: the effect of arterial stiffness. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.2346] [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
Purpose
Invasive abdominal aortic aneurysm (AAA) replacement with an endograft interposes between the normal arterial tree which may acutely reduce overall systemic compliance and increase the input impedance. We evaluated the impact of aortic reconstruction, using currently available grafts and endografts, on pulse wave velocity (pwv) and its effect on early cardiac systolic function indices in these patients.
Methods
A total of 73 men, mean age 70±8 years, were evaluated. Of these, 61 underwent endovascular repair (EVAR) and 12 open repair (OS). All patients underwent an assessment with a standard conventional transthoracic and a two-dimensional speckle tracking echocardiography at baseline, at 1 and 6 months after the intervention. Carotid - femoral (c-f) artery waveforms were measured and pwv was determined in all participants on each follow up visit.
Results
No significant changes in blood pressure were observed during the study period. Notably, our findings revealed a significant reduction in global longitudinal peak strain (GLPS) during the 6 months follow-up (from −19.7±−5.9% at baseline to −17.1±−5.9% at 6 months, p=0.03). C-r pwv showed a significant increase 6 months after the procedure (from 10.7±−2.9 m/sec at baseline to 13.9±3.3 m/sec at 6 months, p<0.001). A significant time effect was found on cf-pwv, which showed an increase at 1 month and remained thereafter (p=0.007). Additionally, a deterioration in GLS values was revealed, with a significant increase at 1 month that persisted 5 months later (p<0.001). No significant group effect was observed between EVAR and open repair (p=0.98) and there was no significant interaction (p=0.96). Notably, the difference of global longitudinal strain (ΔGLS) between baseline and 6 months significantly correlated with the corresponding changes in cf-pwv (r=0.494, p<0.0001).
Conclusions
AAA repair not only leads to an increase in aortic stiffness, as measured by the increase in pwv, but also reduces cardiac systolic function. Our findings highlight the need a more intense cardiac surveillance program after aortic reconstruction. Further studies are needed to investigate how this may translate into long-term manifestations of cardiovascular complications and symptomatology.
Funding Acknowledgement
Type of funding source: None
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Affiliation(s)
- M Marketou
- Heraklion University Hospital, Heraklion, Greece
| | | | - N Kontopodis
- Heraklion University Hospital, Heraklion, Greece
| | | | - H Nakou
- Barts Health NHS Trust, arts Heart Centre, Barts Health NHS Trust / Institute of Cardiovascular Science, London, United Kingdom
| | | | - A Plevritaki
- Heraklion University Hospital, Heraklion, Greece
| | - A Alevizaki
- Heraklion University Hospital, Heraklion, Greece
| | - P Vardas
- Heraklion University Hospital, Heraklion, Greece
| | - C Ioannou
- Heraklion University Hospital, Heraklion, Greece
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Souglakos J, Boukovinas I, Kakolyris S, Xynogalos S, Ziras N, Athanasiadis A, Androulakis N, Christopoulou A, Vaslamatzis M, Ardavanis A, Emmanouilides C, Bompolaki I, Kourousis C, Makrantonakis P, Christofyllakis C, Athanasiadis E, Kentepozidis N, Karampeazis A, Katopodi U, Anagnosopoulos A, Papadopoulos G, Prinarakis E, Kalisperi A, Mavroudis D, Georgoulias V. Three- versus six-month adjuvant FOLFOX or CAPOX for high-risk stage II and stage III colon cancer patients: the efficacy results of Hellenic Oncology Research Group (HORG) participation to the International Duration Evaluation of Adjuvant Chemotherapy (IDEA) project. Ann Oncol 2020; 30:1304-1310. [PMID: 31228203 DOI: 10.1093/annonc/mdz193] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
BACKGROUND The International Duration Evaluation of Adjuvant Chemotherapy (IDEA) aimed to investigate whether a 3 months (3M) of oxaliplatin/fluoropyrimidine-based adjuvant chemotherapy (CT) is non-inferior to the 6-month (6M) administration in 3-year disease-free survival (3yDFS) in high-risk (HR) stage II or stage III colon cancer (CC). METHODS Hellenic Oncology Research Group (HORG)-IDEA randomized patients between 3M and 6M of CT with FOLFOX4 or CAPOX. RESULTS In total 1115 patients, 413 with HR stage II and 702 with stage III CC, were randomized. The median follow-up was 67.0 (38.3-126.0) months. Overall, 394 DFS events (202 in 3M arm and 192 in 6M arm) where recorded. The 3yDFS rate was 77.2% [95% confidence interval (CI) 72.1% to 82.3%] for 3M and 77.9% (72.6% to 82.5%) for 6M of treatment [hazard ratio (HR) 1.05 (95% CI 0.61-1.55); P = 0.647]. Eighty DFS events (3M N = 41; 6M N = 39) were observed in HR stage II patients for a 3yDFS rate of 82.7% and 83.4%, respectively (HR 1.05; 95% CI 0.68-1.63, P = 0.829). For stage III patients, 314 DFS events (3M N = 161 and 6M N = 153) were observed, for a 3yDFS rate of 72.9% for 3M versus 74.1% for 6M (HR 1.06; 95% CI 0.81-1.42, P = 0.622). For HR stage II patients receiving FOLFOX4, 3yDFS rate was 76.7% for 3M and 79.3% for 6M (HR 1.21; 95% CI 0.54-2.70). For HR stage II patients receiving CAPOX the 3yDFS rate was 85.4% for 3M and 83.8% for 6M (HR 0.99; 95% CI 0.59-1.67). For stage III patients receiving FOLFOX4, the 3yDFS rate was 71.5% for 3M and 77.3% for 6M (HR 1.18; 95% CI 0.74-1.86). For stage III patients receiving CAPOX, the 3yDFS rate was 74.5% for 3M and 74.7% for 6M (HR 0.99; 95% CI 0.70-1.44). CONCLUSIONS The results of the HORG-IDEA study are in line with those of the global IDEA project, indicating that the 3yDFS is dependent on the administered adjuvant regimen and the choice and duration of regimen should be personalized. CLINICALTRIALS.GOV REGISTRATION NUMBER NCT01308086.
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Affiliation(s)
- J Souglakos
- Hellenic Oncology Research Group, Athens, Greece.
| | - I Boukovinas
- Hellenic Oncology Research Group, Athens, Greece
| | - S Kakolyris
- Hellenic Oncology Research Group, Athens, Greece
| | - S Xynogalos
- Hellenic Oncology Research Group, Athens, Greece
| | - N Ziras
- Hellenic Oncology Research Group, Athens, Greece
| | | | | | | | | | - A Ardavanis
- Hellenic Oncology Research Group, Athens, Greece
| | | | - I Bompolaki
- Hellenic Oncology Research Group, Athens, Greece
| | - C Kourousis
- Hellenic Oncology Research Group, Athens, Greece
| | | | | | | | | | | | - U Katopodi
- Hellenic Oncology Research Group, Athens, Greece
| | | | | | - E Prinarakis
- Hellenic Oncology Research Group, Athens, Greece
| | - A Kalisperi
- Hellenic Oncology Research Group, Athens, Greece
| | - D Mavroudis
- Hellenic Oncology Research Group, Athens, Greece
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14
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Kontses A, Ntziachristos L, Zardini AA, Papadopoulos G, Giechaskiel B. Particulate emissions from L-Category vehicles towards Euro 5. Environ Res 2020; 182:109071. [PMID: 31887467 PMCID: PMC7043005 DOI: 10.1016/j.envres.2019.109071] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 12/19/2019] [Accepted: 12/20/2019] [Indexed: 06/10/2023]
Abstract
The current experimental study presents particulate emissions from 30 Euro 1-4 L-category vehicles (i.e. 2-, 3- and 4-wheelers such as mopeds, motorcycles, quads and minicars, registered in Europe between 2009 and 2016) tested on a chassis dynamometer. The objectives were to identify those sub-categories with high emissions, to assess whether the measures prescribed in the Euro 5 legislation will effectively control particulate emissions and finally to investigate the need for additional measures. The results showed that 2-stroke (2S) mopeds and diesel minicars comprised the vehicles with the highest particulate mass (PM) and solid particle number above 23 nm (SPN23) emissions (up to 64 mg/km and 4.5 × 1013 km-1, respectively). It is uncertain whether the installation of diesel particulate filters (DPF) is a cost-effective measure for diesel mini-cars in order to comply with Euro 5 standard, while advanced emission controls will be required for 2S mopeds, if such vehicles remain competitive for Euro 5. Regarding 4-stroke mopeds, motorcycles and quads, PM emissions were one order of magnitude lower than 2S ones and already below the Euro 5 limit. Nevertheless, SPN23 emissions from these sub-categories were up to 5 times higher than the Euro 6 passenger cars limit (6 × 1011 km-1). Even recent Euro 4 motorcycles exceeded this limit by up to 3 times. These results indicate that L-category vehicles are a significant contributor to vehicular particulate emissions and should be further monitored during and after the introduction of the Euro 5 step. Moreover, including SPN in the range 10-23 nm increases emission levels by up to 2.4 times compared to SPN23, while volatile and semi-volatile particle numbers were even higher. Finally, cold engine operation was found to be a significant contributor on SPN23 emissions, especially for vehicles with lower overall emission levels. These results indicate that a specific particle number limit may be required for L-category to align emissions with passenger cars.
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Affiliation(s)
- A Kontses
- Laboratory of Applied Thermodynamics, Aristotle University of Thessaloniki, P.O. Box 458, GR 54124, Thessaloniki, Greece.
| | - L Ntziachristos
- Laboratory of Applied Thermodynamics, Aristotle University of Thessaloniki, P.O. Box 458, GR 54124, Thessaloniki, Greece.
| | - A A Zardini
- European Commission Joint Research Center, Directorate for Energy, Transport and Climate, Sustainable Transport Unit, 21027, Ispra (VA), Italy.
| | - G Papadopoulos
- Emisia S.A., Antoni Tritsi 21, PO Box 8138, GR-57001, Thessaloniki, Greece.
| | - B Giechaskiel
- European Commission Joint Research Center, Directorate for Energy, Transport and Climate, Sustainable Transport Unit, 21027, Ispra (VA), Italy.
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15
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Varvaras D, Nina H, De Felice V, Al-Lawati T, Angeletti M, Tardioli S, Papadopoulos G, Petrella G. Immediate implant-based prepectoral breast reconstruction using acellular dermal matrix. Breast 2019. [DOI: 10.1016/s0960-9776(19)30414-x] [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] Open
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16
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Papadopoulos G, Keymel S, Minol GP, Blehm A, Kruger S, Jung C, Westenfeld R, Lichtenberg A, Kelm M, Zeus T, Veulemans V. P5453Increased perinterventional risk for patients with severe aortic stenosis and coexisting pulmonary hypertension treated by transfemoral aortic valve implantation. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p5453] [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: 11/12/2022] Open
Affiliation(s)
- G Papadopoulos
- University Hospital Dusseldorf, Department of Cardiology, Pneumology and Angiology, Dusseldorf, Germany
| | - S Keymel
- University Hospital Dusseldorf, Department of Cardiology, Pneumology and Angiology, Dusseldorf, Germany
| | - G P Minol
- University Hospital Dusseldorf, Department of Cardiovascular Surgery, Dusseldorf, Germany
| | - A Blehm
- University Hospital Dusseldorf, Department of Cardiovascular Surgery, Dusseldorf, Germany
| | - S Kruger
- University Hospital Dusseldorf, Department of Cardiology, Pneumology and Angiology, Dusseldorf, Germany
| | - C Jung
- University Hospital Dusseldorf, Department of Cardiology, Pneumology and Angiology, Dusseldorf, Germany
| | - R Westenfeld
- University Hospital Dusseldorf, Department of Cardiology, Pneumology and Angiology, Dusseldorf, Germany
| | - A Lichtenberg
- University Hospital Dusseldorf, Department of Cardiovascular Surgery, Dusseldorf, Germany
| | - M Kelm
- University Hospital Dusseldorf, Department of Cardiology, Pneumology and Angiology, Dusseldorf, Germany
| | - T Zeus
- University Hospital Dusseldorf, Department of Cardiology, Pneumology and Angiology, Dusseldorf, Germany
| | - V Veulemans
- University Hospital Dusseldorf, Department of Cardiology, Pneumology and Angiology, Dusseldorf, Germany
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17
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Marketou M, Papadopoulos G, Kontopodis N, Patrianakos A, Nakou H, Maragkoudakis S, Katsouli E, Loulakakis M, Papadopoulos D, Kochiadakis G, Vardas P, Parthenakis F. P5490Changes of left ventricular global longitudinal peak strain in patients undergoing endovascular repair of abdominal aortic aneurysms: the effect of arterial stiffness. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy566.p5490] [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)
- M Marketou
- Heraklion University Hospital, Heraklion, Greece
| | | | - N Kontopodis
- Heraklion University Hospital, Heraklion, Greece
| | | | - H Nakou
- Barts Health NHS Trust, arts Heart Centre, Barts Health NHS Trust / Institute of Cardiovascular Science, London, United Kingdom
| | | | - E Katsouli
- Heraklion University Hospital, Heraklion, Greece
| | - M Loulakakis
- Heraklion University Hospital, Heraklion, Greece
| | | | | | - P Vardas
- Heraklion University Hospital, Heraklion, Greece
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18
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Kontopodis N, Papaioannou A, Tavlas E, Papadopoulos G, Lioudaki S, Tzirakis K, Ioannou CV. The use of local anesthesia to perform lower limb revascularization in the fragile patient with critical limb ischemia. G Chir 2018; 39:77-81. [PMID: 29694305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Patients with critical limb ischemia are usually compromised, frequently making administration of general or regional anesthesia problematic. We treated 3 fragile patients presenting contraindications to undertake traditional anesthetic techniques for lower limb revascularization, in whom local anesthesia with conscious sedation was used to complete the operation. An axillo-bifemoral, a unilateral axillo-femoral and a femoro-femoral bypass were performed. Procedure was uneventful in all three cases despite the coexistence of specific surgical challenges (distal anastomosis at the profunda in two cases, redo surgery and scarred groin in the third). Surgical revascularization under local anesthesia may be considered in selected high risk patients.
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19
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Papadopoulos G, Cools A, Janssens GPJ, Maes D. Postpartum dysgalactia in sows: pathophysiology and risk factors. Tierarztl Prax Ausg G Grosstiere Nutztiere 2018. [DOI: 10.1055/s-0038-1623058] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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20
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Afrantou T, Natsis KS, Papadopoulos G, Lagoudaki R, Poulios C, Mamouli D, Kostopoulos I, Grigoriadis N. A case of CD30+ ALK1- anaplastic large cell lymphoma resembling acute disseminated encephalomyelitis. Mult Scler Relat Disord 2017; 13:119-121. [PMID: 28427693 DOI: 10.1016/j.msard.2017.03.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2016] [Revised: 02/11/2017] [Accepted: 03/05/2017] [Indexed: 10/20/2022]
Abstract
Central nervous system involvement is an uncommon complication of systemic non-Hodgkin lymphomas. The majority of these cases concern B-cell lymphomas. We report a case of systemic T-cell anaplastic large cell lymphoma CD30+ ALK- with CNS involvement at the time of diagnosis and unusual MRI characteristics resembling acute disseminated encephalomyelitis.
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Affiliation(s)
- T Afrantou
- B' Department of Neurology, AHEPA University Hospital, Kyriakidi Str., 54636 Thessaloniki, Greece
| | - K S Natsis
- B' Department of Neurology, AHEPA University Hospital, Kyriakidi Str., 54636 Thessaloniki, Greece.
| | - G Papadopoulos
- B' Department of Neurology, AHEPA University Hospital, Kyriakidi Str., 54636 Thessaloniki, Greece
| | - R Lagoudaki
- B' Department of Neurology, AHEPA University Hospital, Kyriakidi Str., 54636 Thessaloniki, Greece
| | - C Poulios
- Department of Pathology, Aristotle University of Thessaloniki, Greece
| | - D Mamouli
- B' Department of Neurology, AHEPA University Hospital, Kyriakidi Str., 54636 Thessaloniki, Greece
| | - I Kostopoulos
- Department of Pathology, Aristotle University of Thessaloniki, Greece
| | - N Grigoriadis
- B' Department of Neurology, AHEPA University Hospital, Kyriakidi Str., 54636 Thessaloniki, Greece
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21
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Polychroniadou E, Bakirtzis C, Langdon D, Lagoudaki R, Kesidou E, Theotokis P, Tsalikakis D, Poulatsidou K, Kyriazis O, Boziki M, Papadopoulos G, Boura E, Sintila L, Hatzigeorgiou S, Ziamos C, Ioannidis P, Karacostas D, Grigoriadis N. Validation of the Brief International Cognitive Assessment for Multiple Sclerosis (BICAMS) in Greek population with multiple sclerosis. Mult Scler Relat Disord 2016; 9:68-72. [DOI: 10.1016/j.msard.2016.06.011] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Revised: 06/21/2016] [Accepted: 06/25/2016] [Indexed: 10/21/2022]
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22
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Papadopoulos G, Shaik-Dasthagirisaheb YB, Huang N, Viglianti GA, Henderson AJ, Kantarci A, Gibson FC. Immunologic environment influences macrophage response to Porphyromonas gingivalis. Mol Oral Microbiol 2016; 32:250-261. [PMID: 27346827 DOI: 10.1111/omi.12168] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/26/2016] [Indexed: 02/03/2023]
Abstract
Macrophages adapt both phenotypically and functionally to the cytokine balance in host tissue microenvironments. Recent studies established that macrophages contribute an important yet poorly understood role in the development of infection-elicited oral bone loss. We hypothesized that macrophage adaptation to inflammatory signals encountered before pathogen interaction would significantly influence the subsequent immune response of these cells to the keystone oral pathobiont Porphyromonas gingivalis. Employing classically activated (M1) and alternatively activated (M2) murine bone-marrow-derived macrophage (BMDMø), we observed that immunologic activation of macrophages before P. gingivalis challenge dictated phenotype-specific changes in the expression of inflammation-associated molecules important to sensing and tuning host response to bacterial infection including Toll-like receptors 2 and 4, CD14, CD18 and CD11b (together comprising CR3), major histocompatibility complex class II, CD80, and CD86. M2 cells responded to P. gingivalis with higher expression of tumor necrosis factor-α, interleukin-6, monocyte chemoattractant protein-1, macrophage inflammatory protein-1α, regulated on activation normal T cell expressed and secreted, and KC than M1 cells. M1 BMDMø expressed higher levels of interleukin-10 to P. gingivalis than M2 BMDMø. Functionally, we observed that M2 BMDMø bound P. gingivalis more robustly than M1 BMDMø. These data describe an important contribution of macrophage skewing in the subsequent development of the cellular immune response to P. gingivalis.
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Affiliation(s)
- G Papadopoulos
- Section of infectious Diseases, Department of Medicine, Boston University School of Medicine, Boston, MA, USA
| | - Y B Shaik-Dasthagirisaheb
- Section of infectious Diseases, Department of Medicine, Boston University School of Medicine, Boston, MA, USA
| | - N Huang
- Section of infectious Diseases, Department of Medicine, Boston University School of Medicine, Boston, MA, USA
| | - G A Viglianti
- Department of Microbiology, Boston University School of Medicine, Boston, MA, USA
| | - A J Henderson
- Section of infectious Diseases, Department of Medicine, Boston University School of Medicine, Boston, MA, USA
| | - A Kantarci
- Department of Applied Oral Sciences, Forsyth Institute, Cambridge, MA, USA
| | - F C Gibson
- Section of infectious Diseases, Department of Medicine, Boston University School of Medicine, Boston, MA, USA
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Abstract
The aim of this study was to assess the cost-effectiveness of topiramate vs. no preventive treatment in the UK. Model inputs included baseline migraine frequency, treatment discontinuation and response, preventive and acute medical cost per attack [2005 GBP (£)] and gain in health utility. Outcomes included monthly migraines averted, acute and preventive treatment costs and cost per quality-adjusted life year (QALY). Topiramate was associated with 1.8 fewer monthly migraines and a QALY gain of 0.0384. The incremental cost of topiramate vs. no preventive treatment was about £10 per migraine averted and £5700 per QALY. Results are sensitive to baseline monthly migraine frequency, triptan use rate and the gain in utility. Incorporating savings from reduced work loss (about £36 per month) suggests that topiramate would be cost saving compared with no preventive treatment. This analysis suggests that topiramate is a cost-effective treatment for migraine prevention compared with no preventive treatment.
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Affiliation(s)
- J S Brown
- Harvard Medical School/Harvard Pilgrim Health Care, Department of Ambulatory Care & Prevention, Boston, MA, USA
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24
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Mavrogeni S, Smerla R, Grigoriadou G, Servos G, Koutsogeorgopoulou L, Karabela G, Stavropoulos E, Spiliotis G, Kolovou G, Papadopoulos G. Cardiovascular magnetic resonance evaluation of paediatric patients with systemic lupus erythematosus and cardiac symptoms. Lupus 2016; 25:289-295. [DOI: 10.1177/0961203315611496] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023]
Abstract
Objectives To evaluate the cardiovascular magnetic resonance (CMR) findings in a paediatric population with systemic lupus erythematosus (SLE) and cardiac symptoms. Methods Twenty-five SLE children, aged 10.2 ± 2.6 years, with cardiac symptoms and normal routine non-invasive evaluation were examined by CMR, using a 1.5 T system and compared with sex–matched SLE adults. Left ventricular (LV) volumes, ejection fraction, T2 ratio, early (EGE) and late (LGE) gadolinium enhancement were assessed. Acute and chronic lesions were characterised as LGE-positive plus T2 > 2, EGE > 4 or T2 < 2, EGE < 4, respectively. According to LGE, lesions were characterized as: (a) diffuse subendocardial, (b) subepicardial and (c) subendocardial/transmural, due to vasculitis, myocarditis and myocardial infarction, respectively. Results LV ejection fraction (LVEF) was normal in all SLEs. T2 > 2, EGE > 4 and positive epicardial LGE wall was identified in 5/25 children. Diffuse subendocardial fibrosis was documented in 1/25. No evidence of myocardial infarction was identified in any children. In contrast, in SLE adults, LGE indicative of myocardial infarction was identified in 6/25, myocarditis in 3/25, Libman–Sacks endocarditis in 1/25 and diffuse subendocardial fibrosis in 2/25. The incidence of heart disease in SLE children was lower compared to SLE adults ( p < 0.05), with a predominance of myocarditis in children and myocardial infarction in adults. A significant correlation was documented between disease duration and CMR lesions ( p < 0.05). Conclusion CMR identifies a predominance of myocarditis in paediatric SLE with cardiac symptoms and normal routine non-invasive evaluation. However, the incidence of cardiac lesions is lower compared to SLE adults, probably due to shorter disease duration. Significance and Innovation: CMR identifies heart involvement in a significant percentage of SLE children with cardiac symptoms and normal routine noninvasive evaluation. The incidence of heart disease is lower in SLE children compared with SLE adults. Predominance of myocarditis and myocardial infarction is observed in SLE children and SLE adults, respectively.
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Affiliation(s)
- S Mavrogeni
- Onassis Cardiac Surgery Center, Athens, Greece
| | - R Smerla
- Aglaia Kyriakou Children’s Hospital, Athens, Greece
| | | | - G Servos
- Aglaia Kyriakou Children’s Hospital, Athens, Greece
| | | | | | | | | | - G Kolovou
- Onassis Cardiac Surgery Center, Athens, Greece
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Petrou A, Lagos N, Arnaoutoglou E, Tzimas P, Krikonis K, Papadopoulos G. Five classes Euroscore modification improves accuracy of prediction of postoperative mortality and possibly the length of mechanical ventilation of cardiac surgery patients. J Cardiovasc Surg (Torino) 2015; 56:905-912. [PMID: 26509394] [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] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
AIM The additive EuroSCORE system for predicting operative mortality of cardiac patients tends to underestimate the mortality risk of high risk patients and concomitantly to overestimate that of low risk patients. We propose a modification of stratification groups aiming at improving its precision. We also tested its ability to predict the length of postoperative mechanical ventilation of our patients. METHODS The high risk group of the EuroSCORE system (>6 points) was divided into three additional groups (group I: 0-2 points, group II: 3-5 points, group III: 6-8 points, group IV: 9-13 points, group V: >14 points) thus producing a 5 classes system. In a group of 301 cardiac surgery patients operated on in a low volume cardiac center, we calculated the expected mortality rate for each EuroSCORE class, the calibration of the modified scoring system, the ROC and the corresponding AUC values and the relative risk of each predisposing factor used by the original EuroSCORE sytem. RESULTS The proposed modification increased the discrimination ability of EuroSCORE in predicting mortality (Hosmer-Lemeshow P=0.78, ROC size: 0.791) and marginally affected its accuracy in predicting length of postoperative mechanical ventilation (Hosmer-Lemeshow: 0.11, ROC size: 0.711). Combined operations of CABG and valve replacement were shown to exert a statistically significant effect on mortality (odds ratio 3.85, CI: 1.15-12.87, P=0.028). CONCLUSION The proposed modification of additive EuroSCORE can presumably increase its discrimination ability in predicting mortality of cardiac patients handled in a low volume cardiac center. The need for prolonged mechanical ventilation could be predicted with acceptable accuracy, possibly providing support in resource management.
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Affiliation(s)
- A Petrou
- Department of Anesthesia, Medical School University of Ioannina, Ioannina, Greece -
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26
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Mamaloudis I, Zacharoulis D, Samara M, Papadopoulos G, Samara S, Koukoulis G, Chatzitheofilou C, Kollia P. Expression profile of the GA733 gene family in colorectal cancer: correlation with clinicopathological parameters. Genet Mol Res 2015; 14:14772-81. [PMID: 26600538 DOI: 10.4238/2015.november.18.42] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
GA733-1/-2/-3 genes have been detected in various types of cancer, although their role has not been fully clarified. GA733-2 and GA733-1 have been correlated with lymph node metastases in laryngeal cancer and liver metastases, respectively. Only a few studies have elucidated the mechanisms regulating GA733-1/-2 expression and their effect on colorectal cancer. Therefore, the expression pattern and the role of the aforementioned molecules in colorectal carcinogenesis were evaluated in this study. Tissue samples were obtained from 40 patients with colorectal cancer with no liver metastases. GA733-1/-2 mRNA levels were evaluated by quantitative real-time polymerase chain reaction. GA733-1/-2 gene expression in noncancerous/cancerous tissues was also correlated with clinicopathological parameters. The GA733-1 mRNA levels were very low; however, the GA733-1 mRNA transcripts were higher in cancerous tissues than in normal tissues (median ratio, 0.004391/0.00093; range, 0.000001- 0.025139/0.000001-0.007761), respectively (P = 0.012). GA733-2 gene expression was higher in noncancerous tissues than in cancerous tissues (median ratio 273.31/115.64; range, 65.24-1,486.41/11.58-1,189.14; P = 0.0000195). Lower GA733-2 expression in cancer tissues appeared to correlate with lymph node metastases (P < 0.05). GA733-1 gene expression was significantly higher in cancerous samples; conversely, the GA733-2 mRNA levels were higher in noncancerous tissues, and were significantly correlated with lymph node perforation in colorectal cancer (P < 0.05). Therefore, GA733-1/-2 mRNA expression levels appear to be a potential predictive marker of tumorigenesis.
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Affiliation(s)
- I Mamaloudis
- Department of Surgery, University Hospital of Larissa, Larissa, Greece
| | - D Zacharoulis
- Department of Surgery, University Hospital of Larissa, Larissa, Greece
| | - M Samara
- Department of Pathology, School of Medicine, University of Thessaly, Larissa, Greece
| | - G Papadopoulos
- Department of Surgery, University Hospital of Larissa, Larissa, Greece
| | - S Samara
- Department of Genetics and Biotechnology, Faculty of Biology, School of Physical Sciences, University of Athens, Athens, Greece
| | - G Koukoulis
- Department of Pathology, School of Medicine, University of Thessaly, Larissa, Greece
| | - C Chatzitheofilou
- Department of Surgery, University Hospital of Larissa, Larissa, Greece
| | - P Kollia
- Department of Genetics and Biotechnology, Faculty of Biology, School of Physical Sciences, University of Athens, Athens, Greece
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Tzimas P, Petrou A, Laou E, Milionis H, Mikhailidis D, Papadopoulos G. Impact of metabolic syndrome in surgical patients: should we bother? Br J Anaesth 2015; 115:194-202. [DOI: 10.1093/bja/aev199] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
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Ioannou CV, Kontopodis N, Kehagias E, Papaioannou A, Kafetzakis A, Papadopoulos G, Pantidis D, Tsetis D. Endovascular aneurysm repair with the Ovation TriVascular Stent Graft System utilizing a predominantly percutaneous approach under local anaesthesia. Br J Radiol 2015; 88:20140735. [PMID: 25966288 DOI: 10.1259/bjr.20140735] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
OBJECTIVE To present our experience with the Ovation Abdominal Stent Graft System (TriVascular Inc., Santa Rosa, CA) during endovascular aneurysm repair (EVAR) and compare results according to the type of anaesthesia. METHODS We conducted a single-centre retrospective study including patients who underwent EVAR using the Ovation endograft between May 2011 and July 2014. Outcome was evaluated regarding pre-, peri- and immediate postoperative and follow-up measures. Overall results are reported, while additional analysis was performed to compare the outcome between groups of patients undertaking either local or regional/general anaesthesia (LA vs RGA). RESULTS 66 patients were included. Median follow-up was 13 months (range, 1-39 months). Median age was 72 years and median abdominal aortic aneurysm diameter was 58 mm (range, 54-100 mm). Technical success was 63 (95%), while there were 2 (3%) conversions to open surgery. A total percutaneous approach was used in 50/66 (76%) cases. Overall, 9/66 (14%) subjects suffered from any kind of morbidity. Median hospitalization was 3 days (range, 1-16 days). Immediate and midterm mortality rate was 0%. No endoleak Type I, III, IV or stent migration was observed. There were 8 (13%) Type II endoleaks. Overall, additional endovascular procedures were required in 6 (9%), while surgery was performed in 4 (6%) patients. 44 (67%) patients underwent LA and 22 (23%) RGA. Differences between groups were significant for procedural time (85 vs 107 min; p < 0.001), percutaneous access (91% vs 45%; p < 0.001) and systematic complications (2.3% vs 14%; p = 0.05). CONCLUSION EVAR with the use of the Ovation endograft shows promising short-term and midterm results regarding safety and effectiveness. Completion of the procedures under LA using a total percutaneous approach seems advantageous and may be used in routine practice. ADVANCES IN KNOWLEDGE The Ovation Abdominal Stent Graft System is an ultra-low profile stent graft system that allows percutaneous deployment for EVAR and offers excellent overall efficacy and safety. Totally percutaneous EVAR under LA seems advantageous and may be used as a routine with this specific endograft.
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Affiliation(s)
- C V Ioannou
- 1 Vascular Surgery Unit, Department of Cardiothoracic and Vascular Surgery, University of Crete Medical School, Heraklion, Crete, Greece
| | - N Kontopodis
- 1 Vascular Surgery Unit, Department of Cardiothoracic and Vascular Surgery, University of Crete Medical School, Heraklion, Crete, Greece
| | - E Kehagias
- 2 Interventional Radiology Unit, Radiology Department, University of Crete Medical School, Heraklion, Crete, Greece
| | - A Papaioannou
- 3 Anesthesiology Department, University of Crete Medical School, Heraklion, Crete, Greece
| | - A Kafetzakis
- 1 Vascular Surgery Unit, Department of Cardiothoracic and Vascular Surgery, University of Crete Medical School, Heraklion, Crete, Greece
| | - G Papadopoulos
- 1 Vascular Surgery Unit, Department of Cardiothoracic and Vascular Surgery, University of Crete Medical School, Heraklion, Crete, Greece
| | - D Pantidis
- 1 Vascular Surgery Unit, Department of Cardiothoracic and Vascular Surgery, University of Crete Medical School, Heraklion, Crete, Greece
| | - D Tsetis
- 2 Interventional Radiology Unit, Radiology Department, University of Crete Medical School, Heraklion, Crete, Greece
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Katsimpris J, Theoulakis P, Vasilopoulos K, Skourtis G, Papadopoulos G, Petropoulos I. Correlation between Central Corneal Thickness and Intraocular Pressure Measured by Goldmann Applanation Tonometry or Pascal Dynamic Contour Tonometry. Klin Monbl Augenheilkd 2015; 232:414-8. [PMID: 25902089 DOI: 10.1055/s-0035-1545792] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- J. Katsimpris
- Department of Ophthalmology, General Hospital of Patras “Agios Andreas”, Patras, Greece
| | - P. Theoulakis
- Department of Ophthalmology, Royal Free London NHS Foundation Trust, London, United Kingdom
| | - K. Vasilopoulos
- Department of Ophthalmology, General Hospital of Patras “Agios Andreas”, Patras, Greece
| | - G. Skourtis
- Department of Ophthalmology, General Hospital of Patras “Agios Andreas”, Patras, Greece
| | - G. Papadopoulos
- Ophthalmology, Surgical Unit, General Hospital of Aigio, Aigio, Greece
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Souka AP, Papastefanou I, Papadopoulos G, Chrelias C, Kassanos D. Cervical length in late second and third trimesters: a mixture model for predicting delivery. Ultrasound Obstet Gynecol 2015; 45:308-312. [PMID: 24817155 DOI: 10.1002/uog.13407] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [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: 12/17/2013] [Revised: 04/19/2014] [Accepted: 04/25/2014] [Indexed: 06/03/2023]
Abstract
OBJECTIVES To examine the distribution of cervical length (CL) in the late second and third trimesters of pregnancy and construct survival models for spontaneous delivery. METHODS This cross-sectional study included 647 women with a singleton pregnancy who had routine CL measurements taken by transvaginal ultrasonography between 24 and 40 weeks' gestation. Only one measurement per patient was included in the analysis. Exploratory data analysis revealed that the distribution of CL measurements was a mixture of two Gaussian distributions, and subsequently a mixture model was applied to describe the distribution of CL. Changes in CL in relation to gestational age were examined by regression analysis and measurements were converted to Z-scores. Survival analysis was applied to the subgroups identified, to describe the probability of delivery throughout gestation. RESULTS CL was best described by a mixture model of two subgroups with Gaussian distribution, one including women with a long cervix (73.85% of the study population, mean CL of 28.2 ± 4.45 mm) and the other including women with a short cervix (26.15% of the study population, mean CL of 12.3 ± 5.14 mm). CL was dependent on gestational age (GA), therefore conversion to Z-scores was employed in the analysis. Women with a short cervix had a higher probability for spontaneous delivery (hazard ratio (HR), 1.807; P < 0.001) than did women with a long cervix, after adjustment for GA at the time of measurement (GA HR, 1.115; P < 0.001). In both subgroups, the probability of spontaneous delivery was predicted by the GA and CL Z-scores. Survival models for the prediction of spontaneous delivery were constructed separately for the short-cervix subgroup (GA HR, 1.085; P < 0.001 and CL Z-score HR, 0.819; P = 0.003) and the long-cervix subgroup (GA HR, 1.130; P < 0.001 and CL Z-score HR, 0.864; P = 0.005). CONCLUSIONS CL follows a mixture of two Gaussian distributions, one for a short and one for a long cervix. Late second-trimester/third-trimester CL measurement may be of value in estimating the probability for spontaneous delivery at any given gestational age.
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Affiliation(s)
- A P Souka
- Fetal Medicine Unit, 3rd Department of Obstetrics and Gynaecology, University of Athens, 'Attikon' University Hospital, Athens, Greece
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Markowitz JS, Papadopoulos G, Markowitz A. Development of a Longitudinal National Football League Injury and Injury Impacts (L-NFL-III) Database. Value Health 2014; 17:A728. [PMID: 27202598 DOI: 10.1016/j.jval.2014.08.068] [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: 06/05/2023]
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Affiliation(s)
- A Bourdoumis
- Endourology and Stone Services, Royal London Hospital, Barts Health NHS Trust, London, UK.
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33
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Katsimpris J, Theoulakis P, Papadopoulos G, Katsimpris A, Lepidas J, Petropoulos I. Ocular Pulse Amplitude Measurement Using Pascal Dynamic Contour Tonometer in Glaucoma Patients. Klin Monbl Augenheilkd 2014; 231:363-7. [DOI: 10.1055/s-0034-1368220] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- J. Katsimpris
- Department of Ophthalmology, General Hospital of Patras “Agios Andreas”, Patras, Greece (Chairman: Dr. G. Vassilopoulos)
| | - P. Theoulakis
- Department of Ophthalmology, Royal Free London NHS Foundation Trust, London, United Kingdom (Chairman: , S. Althauser)
| | - G. Papadopoulos
- Ophthalmology, Surgical Unit, General Hospital of Aigio, Aigio, Greece (Chairman: Dr. G. E. Papadopoulos)
| | - A. Katsimpris
- Department of Ophthalmology, General Hospital of Patras “Agios Andreas”, Patras, Greece (Chairman: Dr. G. Vassilopoulos)
| | - J. Lepidas
- Department of Ophthalmology, General Hospital of Patras “Agios Andreas”, Patras, Greece (Chairman: Dr. G. Vassilopoulos)
| | - I. Petropoulos
- Ophthalmological Center of Rive, Geneva, Switzerland (Chairmen: Dr. P. M. Desmangles, Dr. M. A. Matter)
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Papadopoulos G, Pouangare M, Papathanakos G, Arnaoutoglou E, Petrou A, Tzimas P. The effect of ondansetron on postoperative delirium and cognitive function in aged orthopedic patients. Minerva Anestesiol 2014; 80:444-451. [PMID: 24193238] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
BACKGROUND Postoperative delirium and cognitive dysfunction are common in hospitalized patients. The aim of this study was to investigate whether postoperative ondansetron administration has a favorable effect on postoperative delirium and 30th day cognitive function and pain in patients undergoing surgery with general anaesthesia due to femoral or hip fracture. METHODS A hundred and six patients aged >40 years old scheduled for a femoral or hip fracture rehabilitation surgery, were randomized on a double-blind protocol to receive postoperatively 4 ml of either ondansetron 8 mg (Group A) or placebo (Group B) daily i.v. for five days. Each patient was evaluated preoperatively and on the 2nd, 3rd, 4th and 5th day postoperatively with Confusion Assessment Method test, and preoperatively and on the 30th day postoperatively using a sensitive battery of neuropsychological, functional and pain tests. RESULTS Patients of both groups did not differ preoperatively significantly in their basic characteristics and predisposing factors associated with postoperative delirium and cognitive dysfunction. The results showed that postoperative administration of ondansetron was followed by a lower incidence and duration of postoperative delirium and improved postoperative neurocognitive function on the 30th postoperative day, regardless of age or history of stroke. This was accompanied by a significant better postoperative functionality and less pain. CONCLUSION The postoperative ondansetron administration seems to protect and might improve the cognitive function in patients undergoing surgery under general anesthesia. Ondansetron also seems to release analgesic effects.
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Affiliation(s)
- G Papadopoulos
- Department of Anesthesiology and Postoperative Intensive Care Unit, Medical School, University of Ioannina, Ioannina, Greece -
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35
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Abstract
Although epidural analgesia is routinely used in many institutions for patients undergoing hepatic resection, there are unresolved issues regarding its safety and efficacy in this setting. We performed a review of papers published in the area of anaesthesia and analgesia for liver resection surgery and selected four areas of current controversy for the focus of this review: the safety of epidural catheters with respect to postoperative coagulopathy, a common feature of this type of surgery; analgesic efficacy; associated peri-operative fluid administration; and the role of epidural analgesia in enhanced recovery protocols. In all four areas, issues are raised that question whether epidural anaesthesia is always the best choice for these patients. Unfortunately, the evidence available is insufficient to provide definitive answers, and it is clear that there are a number of areas of controversy that would benefit from high-quality clinical trials.
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Affiliation(s)
- P Tzimas
- Department of Anaesthesia and Postoperative Intensive care, Medical School, University of Ioannina, Ioannina, Greece.
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36
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Kostopoulou ON, Papadopoulos G, Kouvela EC, Kalpaxis DL. Clindamycin binding to ribosomes revisited: foot printing and computational detection of two binding sites within the peptidyl transferase center. Pharmazie 2013; 68:616-621. [PMID: 23923646] [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] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Clindamycin is a semi-synthetic lincosamide, active against most Gram-positive bacteria and some protozoa. It binds to the 50S ribosomal subunit and inhibits early peptide chain elongation. By kinetic analysis it has been shown that clindamycin (I) competitively interacts with the A-site of translating ribosomes (C) to form the encounter complex CI, which then slowly isomerizes to a tighter complex, termed C*I. As the final complex is capable of synthesizing peptide bonds with decreased velocity, it was assumed that in C*I complex the drug is fixed near the P-site of the ribosome. In the present study, two series of chemical foot printing experiments were carried out. In the first series, clindamycin and ribosomal complex C were incubated for 1 s and then DMS or kethoxal was added (CI probing). In the second series, complex C was preincubated with clindamycin for 1 min before the addition of DMS or kethoxal (C*I probing). It was found that clindamycin in CI complex protects A2451 and A2602 from chemical probing, both located within the A-site of the catalytic center. In contrast, it strongly protects G2505 in C*I complex, which is a discrete foot print of peptidyl-tRNA bound to the P-site. In both CI and C*I complexes, clindamycin also protects nucleotides A2058 and A2059, located next to the entrance of the exit-tunnel where the nascent peptide leaves the ribosome. Polyamines negatively affect the protection of G2505, but favor the protection of A2451 and A2602 nucleotides. Structure modeling confirms the kinetic and chemical foot printing results and suggests that clindamycin mode of action is more complex than a simple competitive inhibition of peptide bond formation.
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Affiliation(s)
- O N Kostopoulou
- Department of Biochemistry, School of Medicine, University of Patras, Greece
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Anagnostou E, Papadopoulos G, Stamboulis E, Kararizou E. Bilateral cerebellar peduncle lesions in JC virus encephalitis. Int J Infect Dis 2013; 17:e1086-7. [PMID: 23773240 DOI: 10.1016/j.ijid.2013.04.016] [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] [Received: 04/03/2013] [Revised: 04/29/2013] [Accepted: 04/30/2013] [Indexed: 10/26/2022] Open
Affiliation(s)
- E Anagnostou
- Department of Neurology, University of Athens, Eginition Hospital, Vas. Sophias Avenue 74, 11528 Athens, Greece.
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Basta M, Anagnostopoulos G, Stefanakis Z, Vassiliadis V, Rigas A, Koutsomitros S, Papadopoulos G, Panierakis C, Vgontzas A. 1133 – Association between seismicity and mental health: Crete, 2008–2010. Eur Psychiatry 2013. [DOI: 10.1016/s0924-9338(13)76232-1] [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: 10/26/2022] Open
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Papadopoulos G, Edwards PJ, Murray AF. Confidence estimation methods for neural networks: a practical comparison. ACTA ACUST UNITED AC 2012; 12:1278-87. [PMID: 18249957 DOI: 10.1109/72.963764] [Citation(s) in RCA: 118] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Feedforward neural networks, particularly multilayer perceptrons, are widely used in regression and classification tasks. A reliable and practical measure of prediction confidence is essential. In this work three alternative approaches to prediction confidence estimation are presented and compared. The three methods are the maximum likelihood, approximate Bayesian, and the bootstrap technique. We consider prediction uncertainty owing to both data noise and model parameter misspecification. The methods are tested on a number of controlled artificial problems and a real, industrial regression application, the prediction of paper "curl". Confidence estimation performance is assessed by calculating the mean and standard deviation of the prediction interval coverage probability. We show that treating data noise variance as a function of the inputs is appropriate for the curl prediction task. Moreover, we show that the mean coverage probability can only gauge confidence estimation performance as an average over the input space, i.e., global performance and that the standard deviation of the coverage is unreliable as a measure of local performance. The approximate Bayesian approach is found to perform better in terms of global performance.
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Affiliation(s)
- G Papadopoulos
- Department of Electronics and Electrical Engineering, University of Edinburgh, Edinburgh EH9 3JL, UK
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40
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Georgakopoulos J, Zygogianni A, Papadopoulos G, Papandreou N, Kouvaris J, Armonis V, Kelekis N, Kouloulias V. Permanent implantation as brachytherapy technique for prostate carcinoma-review of clinical trials and guidelines. Rev Recent Clin Trials 2012; 7:173-180. [PMID: 22789145 DOI: 10.2174/157488712802281268] [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: 10/26/2011] [Revised: 01/13/2012] [Accepted: 01/13/2012] [Indexed: 06/01/2023]
Abstract
Brachytherapy nowadays has become a widely accepted treatment modality in the management of localized prostate cancer. With recent improvements in ultra-sound technology, imaging, treatment planning and post-implant dosimetry, permanent implantation has become minimally invasive, well tolerated, and safe and most importantly has progressed to a treatment modality comparable to external beam radiation therapy (EBRT) and radical prostatectomy. Multiple studies have proven the efficacy of brachytherapy analyzing also its superiority in health related quality of life; especially in potency preservation after treatment.
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Affiliation(s)
- J Georgakopoulos
- Radiation Oncology Unit, ATTIKON University Hospital, Xaidari, Greece.
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Stefos T, Michos GM, Papadopoulos G, Navrozoglou I, Dousias V. Non-Hodgkin lymphoma during the 1st trimester of pregnancy. J OBSTET GYNAECOL 2012; 32:484-5. [PMID: 22663325 DOI: 10.3109/01443615.2012.682744] [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: 11/13/2022]
Affiliation(s)
- T Stefos
- Departments of Obstetrics and Gynaecology, University of Ioannina, N. Papadopoulou 3, 45444, Ioannina, Greece. ,gr
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Siminelakis S, Baikoussis NG, Arnaoutoglou EM, Papadopoulos G, Goudevenos J. Aortic false aneurysm at the distal anastomotic suture line after aortic arch replacement; a case report with review of the literature. Eur Rev Med Pharmacol Sci 2012; 16:835-838. [PMID: 22913218] [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] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Anastomotic pseudoaneurysm remains one of the main life-threatening complications after surgery on the thoracic aorta. We report a case with a history of ascending and aortic arch replacement and a false aneurysm creation at the anastomotic line found at the 2-year follow-up computed tomography. Either, due to incidental and asymptomatic finding and patient negation to any kind of intervention, it has been followed the medical treatment with blood pressure and heart rate control. In this, we discuss also the ways of treatment and the indication of any interventional therapy. Endovascular stent-grafting is a minimal invasive treatment for thoracic aortic aneurysm. However, its clinical usefulness for anastomotic false aneurysm following thoracic aortic surgery is unclear.
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Affiliation(s)
- S Siminelakis
- Department of Cardiac Surgery, University of Ioannina, School of Medicine, Greece
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Papathanakos G, Pouagare M, Tzimas P, Arnaoutoglou E, Papadopoulos G. The impact of ondansetron on postoperative cognitive function in elderly patients undergoing surgery under general anaesthesia due to femoral fracture - preliminary data. Eur J Anaesthesiol 2012. [DOI: 10.1097/00003643-201206001-00095] [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]
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Mavridou P, Dimitriou V, Papadopoulou M, Manataki A, Arnaoutoglou E, Papadopoulos G. Effect of previous anesthesia experience on patients' knowledge and desire for information about anesthesia and the anesthesiologist: a 500 patients' survey from Greece. Acta Anaesthesiol Belg 2012; 63:63-68. [PMID: 23136806] [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] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
BACKGROUND This study aimed at assessing the effect of previous anesthesia experience on patients' knowledge of anesthesia and the role of anesthesiologists, on what they would want to know about anesthesia and the way they would like to be informed. METHODS Questionnaires with fixed questions were distributed to consenting, consecutive surgical patients before the pre-anesthetic visit. Patients were divided into two groups: patients with previous anesthesia experience (Group A) and patients without previous anesthesia experience (Group B). The questionnaires included patients' demographics, questions related to their knowledge about the anesthesiologists' role and about their desire for information. RESULTS 500 questionnaires were analyzed. The majority of patients (94.2%) know that the anesthesiologist is a specialized doctor and 89.2% believe that the anesthesiologist watches over the patient throughout surgery. These results were similar in both groups. The majority of patients (98.2%) also want to meet the anesthesiologist before surgery and 78% want even more information. Only 65.6% want to be aware of all possible complications, in both groups, while 17.6% do not want to know anything about complications. In general, answers to specific questions regarding what the patients want to know about anesthesia did not differ between groups. The vast majority of patients wish to talk with the anesthesiologist before surgery. CONCLUSION Previous anesthesia experience did not seem to influence patients' desire for meeting the anesthesiologist and seeking information. A strong desire to personally meet the anesthesiologist is expressed and patients' desire for even more information is noted.
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Affiliation(s)
- P Mavridou
- Hatzikosta General Hospital, Anesthesiology Department, Ioannina, Greece.
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Volanis D, Papadopoulos G, Doumas K, Gkialas I, Delakas D. Molecular mechanisms in urinary bladder carcinogenesis. J BUON 2011; 16:589-601. [PMID: 22331708] [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] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Urinary bladder cancer accounts for approximately 5% of all newly diagnosed malignancies in the developed world. Smoking, occupational exposure and dietary factors constitute the most important exogenous risk factors for bladder carcinogenesis. Yet, individuals with seemingly equal exposure to environmental carcinogens develop bladder cancer in an unpredictable manner. This is probably attributed to the fact that DNA repair capacity varies in human populations, pointing the role of genetic susceptibility in human cancer. Numerous studies demonstrated that certain genetic and epigenetic alterations are fairly constant. Loss of heterozygosity (LOH) at chromosome 9 is an aberration found in urothelial cell carcinoma (UCC) of all stages and grades as well as in dysplastic urothelium, possibly representing an early event in urinary bladder carcinogenesis. On the contrary, gains of 3p can only be found in tumors demonstrating highly malignant behavior. Microsatellite instability (MSI) is another frequent finding in urinary bladder cancer. This has led many investigator groups to employ the analysis for MSI for early diagnosis of UCC with promising results. The silencing of certain genes such as p16(INK4A) and DAPK by aberrant methylation of their promoter region also represents an important mechanism in carcinogenesis. Similarly, alterations in certain tumor suppressor genes and proto-oncogenes result in uncontrolled cell proliferation, reduced apoptosis and have been associated with more aggressive UCC phenotypes. Undoubtedly, the application of these observations in clinical practice will make a breakthrough in the management of bladder cancer.
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Affiliation(s)
- D Volanis
- Department of Urology, "Asklipieio" General Hospital, Voula, Athens, Greece
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Pavlou A, Papadopoulos G, Katsaropoulou E, Koteli A. OL-063 Antibiotic susceptibility of Serratia spp. isolated from hospitalised patients in a general hospital. Int J Infect Dis 2011. [DOI: 10.1016/s1201-9712(11)60126-4] [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: 10/17/2022] Open
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Panagopoulou V, Tzimas P, Arampatzis P, Aroni F, Papadopoulos G. The effects of physostigmine on recovery from general anesthesia in elderly patients. Minerva Anestesiol 2011; 77:401-407. [PMID: 21483384] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
BACKGROUND Transient cognitive dysfunction after general anesthesia is a frequent finding among elderly patients. The aim of this study was to evaluate whether the use of physostigmine may enhance recovery from general anesthesia in elderly patients. METHODS Eighty American Society of Anesthesiologists (ASA) physical status I-III patients aged >65 years old who were scheduled for a laparoscopic cholecystectomy received either 2 mg physostigmine in 250 mL N/S 0.9% (Physo group) or 250 mL N/S 0.9% placebo (Control group) after induction of anesthesia via slow IV infusion over 45 minutes. This experiment was performed as a prospective, randomized, double-blinded study. Patients were assessed for sedation, orientation, ability to sit, and ability to pass the "picking up matches" test at 15 minutes, 8 hours, and 24 hours postoperatively. Patients were also evaluated for pain using the visual analogue scale (VAS) score both at rest and with movement. RESULTS The time to extubation was significantly shorter in the Physo group than in the control group (8.0±2.7 vs. 9.8±3.6 min, P=0.012). The time required to pass the "picking up matches" test was also shorter for the Physo group at all of the time points postoperatively (15 minutes postoperatively: 18.0±7.1 vs. 24.6±11.6 sec, P=0.003, 8 hours postoperatively: 11.8±3.9 vs. 16.0±6.0 sec, P<0.001, 24 hours postoperatively: 8.8±3.4 vs. 11.2±4.7 sec, P=0.008). Evaluations of patient orientation and sedation were similar between the experimental and control groups. The VAS score and analgesic requirement were decreased in the Physo group compared to the control group during the first postoperative day. The ability to sit after extubation was also increased in the Physo group at both 15 minutes (P=0.001) and 8 hours postoperatively (P<0.001). CONCLUSION The intraoperative infusion of physostigmine enhances alertness, coordination, manual dexterity and mobilization after general anesthesia in elderly patients, but physostigmine administration does not affect orientation or sedation.
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Affiliation(s)
- V Panagopoulou
- Department of Anesthesia and Postoperative Intensive Care, Medical School, University of Ioannina, Greece
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Arnaoutoglou E, Kouvelos G, Milionis H, Mavridis A, Kolaitis N, Papa N, Papadopoulos G, Matsagkas M. Post-implantation syndrome following endovascular abdominal aortic aneurysm repair: preliminary data. Interact Cardiovasc Thorac Surg 2011; 12:609-14. [DOI: 10.1510/icvts.2010.256784] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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Cools A, Maes D, Papadopoulos G, Vandermeiren JA, Meyer E, Demeyere K, De Smet S, Janssens GPJ. Dose-response effect of fish oil substitution in parturition feed on erythrocyte membrane characteristics and sow performance. J Anim Physiol Anim Nutr (Berl) 2010; 95:125-36. [DOI: 10.1111/j.1439-0396.2010.01119.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Papadopoulos G, Grigoroudis AI, Kyriakidis DA. Dimerization of the AtoC response regulator and modelling of its binding to DNA. J Mol Graph Model 2010; 29:565-72. [PMID: 21115262 DOI: 10.1016/j.jmgm.2010.10.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2010] [Revised: 10/12/2010] [Accepted: 10/18/2010] [Indexed: 11/28/2022]
Abstract
Bacterial signal transduction systems can be viewed as an entity of multi-sensory and output domains, whereas the functions of response regulators play a pivotal role in the complex network interactions. One crucial property among response regulators functions is their oligomerization and subsequent binding to DNA. The AtoS-AtoC two component system, functionally modulated by various agents, influences fundamental cellular processes such as short-chain fatty acid catabolism and poly-(R)-3-hydroxybutyrate biosynthesis in Escherichia coli. Among the already reported characteristic properties, AtoC binds to a specific site, a palindromic repeat of 20 nucleotides within the atoDAEB promoter. Since experimental structures of AtoC or its complex with DNA are not yet available, an almost complete homology model of AtoC and of its putative entity as a dimer is constructed for this study, as well as a model of its binding to its target DNA sequence. The latter is associated with large conformational changes, as shown by molecular dynamics simulations. Subsequent biochemical study, including cross-linking via chemical agents, revealed the ability of AtoC to form oligomers in vitro.
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Affiliation(s)
- G Papadopoulos
- Department of Biochemistry & Biotechnology, University of Thessaly Ploutonos 26 & Aeolou, Larisa GR-41221, Greece
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