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Brunner S, Varga D, Bozó R, Polanek R, Tőkés T, Szabó ER, Molnár R, Gémes N, Szebeni GJ, Puskás LG, Erdélyi M, Hideghéty K. Analysis of Ionizing Radiation Induced DNA Damage by Superresolution dSTORM Microscopy. Pathol Oncol Res 2022; 27:1609971. [PMID: 35370480 PMCID: PMC8966514 DOI: 10.3389/pore.2021.1609971] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Accepted: 10/12/2021] [Indexed: 11/17/2022]
Abstract
The quantitative detection of radiation caused DNA double-strand breaks (DSB) by immunostained γ-H2AX foci using direct stochastic optical reconstruction microscopy (dSTORM) provides a deeper insight into the DNA repair process at nanoscale in a time-dependent manner. Glioblastoma (U251) cells were irradiated with 250 keV X-ray at 0, 2, 5, 8 Gy dose levels. Cell cycle phase distribution and apoptosis of U251 cells upon irradiation was assayed by flow cytometry. We studied the density, topology and volume of the γ-H2AX foci with 3D confocal microscopy and the dSTORM superresolution method. A pronounced increase in γ-H2AX foci and cluster density was detected by 3D confocal microscopy after 2 Gy, at 30 min postirradiation, but both returned to the control level at 24 h. Meanwhile, at 24 h a considerable amount of residual foci could be measured from 5 Gy, which returned to the normal level 48 h later. The dSTORM based γ-H2AX analysis revealed that the micron-sized γ-H2AX foci are composed of distinct smaller units with a few tens of nanometers. The density of these clusters, the epitope number and the dynamics of γ-H2AX foci loss could be analyzed. Our findings suggest a discrete level of repair enzyme capacity and the restart of the repair process for the residual DSBs, even beyond 24 h. The dSTORM superresolution technique provides a higher precision over 3D confocal microscopy to study radiation induced γ-H2AX foci and molecular rearrangements during the repair process, opening a novel perspective for radiation research.
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Affiliation(s)
- Szilvia Brunner
- Biomedical Applications Group, ELI-ALPS Research Institute, ELI-HU Non-Profit Ltd., Szeged, Hungary
| | - Dániel Varga
- Department of Optics and Quantum Electronics, University of Szeged, Szeged, Hungary
| | - Renáta Bozó
- Department of Dermatology and Allergology, University of Szeged, Szeged, Hungary
| | - Róbert Polanek
- Biomedical Applications Group, ELI-ALPS Research Institute, ELI-HU Non-Profit Ltd., Szeged, Hungary.,Department of Oncotherapy, University of Szeged, Szeged, Hungary
| | - Tünde Tőkés
- Biomedical Applications Group, ELI-ALPS Research Institute, ELI-HU Non-Profit Ltd., Szeged, Hungary.,Department of Oncotherapy, University of Szeged, Szeged, Hungary
| | - Emília Rita Szabó
- Biomedical Applications Group, ELI-ALPS Research Institute, ELI-HU Non-Profit Ltd., Szeged, Hungary.,Department of Oncotherapy, University of Szeged, Szeged, Hungary
| | - Réka Molnár
- Biomedical Applications Group, ELI-ALPS Research Institute, ELI-HU Non-Profit Ltd., Szeged, Hungary.,Department of Oncotherapy, University of Szeged, Szeged, Hungary
| | - Nikolett Gémes
- Laboratory of Functional Genomics, Biological Research Centre, Szeged, Hungary
| | - Gábor J Szebeni
- Laboratory of Functional Genomics, Biological Research Centre, Szeged, Hungary
| | - László G Puskás
- Laboratory of Functional Genomics, Biological Research Centre, Szeged, Hungary
| | - Miklós Erdélyi
- Department of Optics and Quantum Electronics, University of Szeged, Szeged, Hungary
| | - Katalin Hideghéty
- Biomedical Applications Group, ELI-ALPS Research Institute, ELI-HU Non-Profit Ltd., Szeged, Hungary.,Department of Oncotherapy, University of Szeged, Szeged, Hungary
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Polanek R, Varga Z, Fodor E, Brunner S, Szabó E, Tőkés T, Hideghéty K. Improved FBX chemical dosimeter system with enhanced radiochemical yield for reference dosimetry in radiobiology and radiotherapy research. Radiat Phys Chem Oxf Engl 1993 2020. [DOI: 10.1016/j.radphyschem.2020.108899] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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3
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Rösch TF, Szabó Z, Haffa D, Bin J, Brunner S, Englbrecht FS, Friedl AA, Gao Y, Hartmann J, Hilz P, Kreuzer C, Lindner FH, Ostermayr TM, Polanek R, Speicher M, Szabó ER, Taray D, Tőkés T, Würl M, Parodi K, Hideghéty K, Schreiber J. A feasibility study of zebrafish embryo irradiation with laser-accelerated protons. Rev Sci Instrum 2020; 91:063303. [PMID: 32611048 DOI: 10.1063/5.0008512] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Accepted: 05/24/2020] [Indexed: 06/11/2023]
Abstract
The development from single shot basic laser plasma interaction research toward experiments in which repetition rated laser-driven ion sources can be applied requires technological improvements. For example, in the case of radio-biological experiments, irradiation duration and reproducible controlled conditions are important for performing studies with a large number of samples. We present important technological advancements of recent years at the ATLAS 300 laser in Garching near Munich since our last radiation biology experiment. Improvements range from target positioning over proton transport and diagnostics to specimen handling. Exemplarily, we show the current capabilities by performing an application oriented experiment employing the zebrafish embryo model as a living vertebrate organism for laser-driven proton irradiation. The size, intensity, and energy of the laser-driven proton bunches resulted in evaluable partial body changes in the small (<1 mm) embryos, confirming the feasibility of the experimental system. The outcomes of this first study show both the appropriateness of the current capabilities and the required improvements of our laser-driven proton source for in vivo biological experiments, in particular the need for accurate, spatially resolved single bunch dosimetry and image guidance.
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Affiliation(s)
- Thomas F Rösch
- Department of Medical Physics, Faculty of Physics, Ludwig-Maximilians-Universität München, 85748 Garching bei München, Germany
| | - Zoltán Szabó
- ELI-ALPS, ELI-HU Non-Profit Ltd., Wolfgang Sandner utca 3., Szeged H-6728, Hungary
| | - Daniel Haffa
- Department of Medical Physics, Faculty of Physics, Ludwig-Maximilians-Universität München, 85748 Garching bei München, Germany
| | - Jianhui Bin
- Accelerator Technology and Applied Physics Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Szilvia Brunner
- ELI-ALPS, ELI-HU Non-Profit Ltd., Wolfgang Sandner utca 3., Szeged H-6728, Hungary
| | - Franz S Englbrecht
- Department of Medical Physics, Faculty of Physics, Ludwig-Maximilians-Universität München, 85748 Garching bei München, Germany
| | - Anna A Friedl
- Department of Radiation Oncology, University Hospital, LMU München, 80337 München, Germany
| | - Ying Gao
- Department of Medical Physics, Faculty of Physics, Ludwig-Maximilians-Universität München, 85748 Garching bei München, Germany
| | - Jens Hartmann
- Department of Medical Physics, Faculty of Physics, Ludwig-Maximilians-Universität München, 85748 Garching bei München, Germany
| | - Peter Hilz
- Department of Medical Physics, Faculty of Physics, Ludwig-Maximilians-Universität München, 85748 Garching bei München, Germany
| | - Christian Kreuzer
- Department of Medical Physics, Faculty of Physics, Ludwig-Maximilians-Universität München, 85748 Garching bei München, Germany
| | - Florian H Lindner
- Department of Medical Physics, Faculty of Physics, Ludwig-Maximilians-Universität München, 85748 Garching bei München, Germany
| | - Tobias M Ostermayr
- Accelerator Technology and Applied Physics Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - Róbert Polanek
- ELI-ALPS, ELI-HU Non-Profit Ltd., Wolfgang Sandner utca 3., Szeged H-6728, Hungary
| | - Martin Speicher
- Department of Medical Physics, Faculty of Physics, Ludwig-Maximilians-Universität München, 85748 Garching bei München, Germany
| | - Emília R Szabó
- ELI-ALPS, ELI-HU Non-Profit Ltd., Wolfgang Sandner utca 3., Szeged H-6728, Hungary
| | - Derya Taray
- Department of Medical Physics, Faculty of Physics, Ludwig-Maximilians-Universität München, 85748 Garching bei München, Germany
| | - Tünde Tőkés
- ELI-ALPS, ELI-HU Non-Profit Ltd., Wolfgang Sandner utca 3., Szeged H-6728, Hungary
| | - Matthias Würl
- Department of Medical Physics, Faculty of Physics, Ludwig-Maximilians-Universität München, 85748 Garching bei München, Germany
| | - Katia Parodi
- Department of Medical Physics, Faculty of Physics, Ludwig-Maximilians-Universität München, 85748 Garching bei München, Germany
| | - Katalin Hideghéty
- ELI-ALPS, ELI-HU Non-Profit Ltd., Wolfgang Sandner utca 3., Szeged H-6728, Hungary
| | - Jörg Schreiber
- Department of Medical Physics, Faculty of Physics, Ludwig-Maximilians-Universität München, 85748 Garching bei München, Germany
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Hideghéty K, Brunner S, Cheesman A, Szabó ER, Polanek R, Margarone D, Tőkés T, Mogyorósi K. 11Boron Delivery Agents for Boron Proton-capture Enhanced Proton Therapy. Anticancer Res 2019; 39:2265-2276. [PMID: 31092418 DOI: 10.21873/anticanres.13343] [Citation(s) in RCA: 9] [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] [Received: 02/04/2019] [Revised: 04/22/2019] [Accepted: 04/23/2019] [Indexed: 11/10/2022]
Abstract
The aim of this review was to define appropriate 11B delivery agents for boron proton-capture enhanced proton therapy (BPCEPT) taking into account the accumulated knowledge on boron compounds used for boron neutron capture therapy (BNCT). BPCEPT is a promising treatment approach which uses a high linear energy transfer (LET) dose component in conjunction with conventional proton therapy to increase the relative biological effectiveness of highly-selective charged particle therapy. Boron proton fusion reactions occur with highest cross section at certain proton energy level and thus can be tailored to the target volume with careful treatment planning that defines the 675 MeV proton distribution with high accuracy. Appropriate 11B compounds are required in order to achieve relevant high LET dose contribution from the boron proton-capture reaction. Previous scientific results and experiences with BNCT provide background knowledge and information regarding the optimization of boronated compound development, their characterization, measurement and imaging. However, there are substantial differences between BNCT and BPCEPT, which in turn places special unique chemical, physical and biological demands on 11B-carrier compounds for BPCEPT. In this review, we evaluate well-known and recently developed boron compounds for BPCEPT.
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Affiliation(s)
- Katalin Hideghéty
- ELI-ALPS, ELI-HU Non-Profit Ltd., Szeged, Hungary.,University of Szeged, Faculty of Medicine, Department of Oncotherapy, Szeged, Hungary
| | | | | | | | | | - Daniele Margarone
- ELI-Beamlines, Institute of Physics of the Czech Academy of Sciences, Prague, Czech Republic
| | - Tünde Tőkés
- ELI-ALPS, ELI-HU Non-Profit Ltd., Szeged, Hungary
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Szabó ER, Reisz Z, Polanek R, Tőkés T, Czifrus S, Pesznyák C, Biró B, Fenyvesi A, Király B, Molnár J, Brunner S, Daroczi B, Varga Z, Hideghéty K. A novel vertebrate system for the examination and direct comparison of the relative biological effectiveness for different radiation qualities and sources. Int J Radiat Biol 2018; 94:985-995. [PMID: 30332320 DOI: 10.1080/09553002.2018.1511928] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [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: 10/28/2022]
Abstract
PURPOSE The recent rapid increase of hadron therapy applications requires the development of high performance, reliable in vivo models for preclinical research on the biological effects of high linear energy transfer (LET) particle radiation. AIM The aim of this paper was to test the relative biological effectiveness (RBE) of the zebrafish embryo system at two neutron facilities. MATERIAL AND METHODS Series of viable zebrafish embryos at 24-hour post-fertilization (hpf) were exposed to single fraction, whole-body, photon and neutron (reactor fission neutrons (<En = 1 MeV>) and (p (18 MeV)+Be, <En> = 3.5 MeV) fast neutron) irradiation. The survival and morphologic abnormalities of each embryo were assessed at 24-hour intervals from the point of fertilization up to 192 hpf and then compared to conventional 6 MV photon beam irradiation results. RESULTS The higher energy of the fast neutron beams represents lower RBE (ref. source LINAC 6 MV photon). The lethality rate in the zebrafish embryo model was 10 times higher for 1 MeV fission neutrons and 2.5 times greater for p (18 MeV)+Be cyclotron generated fast neutron beam when compared to photon irradiation results. Dose-dependent organ perturbations (shortening of the body length, spine curvature, microcephaly, micro-ophthalmia, pericardial edema and inhibition of yolk sac resorption) and microscopic (marked cellular changes in eyes, brain, liver, muscle and the gastrointestinal system) changes scale together with the dose response. CONCLUSION The zebrafish embryo system is a powerful and versatile model for assessing the effect of ionizing radiation with different LET values on viability, organ and tissue development.
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Affiliation(s)
- E R Szabó
- a Extreme Light Infrastructure - Attosecond Light Pulse Source, ELI-HU Non-Profit Ltd , Szeged , Hungary
| | - Z Reisz
- b Department of Pathology , University of Szeged , Szeged , Hungary
| | - R Polanek
- a Extreme Light Infrastructure - Attosecond Light Pulse Source, ELI-HU Non-Profit Ltd , Szeged , Hungary
| | - T Tőkés
- a Extreme Light Infrastructure - Attosecond Light Pulse Source, ELI-HU Non-Profit Ltd , Szeged , Hungary
| | - Sz Czifrus
- c Budapest University of Technology and Economics Institute of Nuclear Techniques , Budapest , Hungary
| | - Cs Pesznyák
- c Budapest University of Technology and Economics Institute of Nuclear Techniques , Budapest , Hungary
| | - B Biró
- d Hungarian Academy of Sciences Institute for Nuclear Research (MTA Atomki) , Debrecen , Hungary
| | - A Fenyvesi
- d Hungarian Academy of Sciences Institute for Nuclear Research (MTA Atomki) , Debrecen , Hungary
| | - B Király
- d Hungarian Academy of Sciences Institute for Nuclear Research (MTA Atomki) , Debrecen , Hungary
| | - J Molnár
- d Hungarian Academy of Sciences Institute for Nuclear Research (MTA Atomki) , Debrecen , Hungary
| | - Sz Brunner
- a Extreme Light Infrastructure - Attosecond Light Pulse Source, ELI-HU Non-Profit Ltd , Szeged , Hungary
| | - B Daroczi
- e Department of Internal Medicine, Division of Geriatrics , University of Debrecen , Debrecen , Hungary
| | - Z Varga
- f Department of Oncotherapy , University of Szeged , Szeged , Hungary
| | - K Hideghéty
- a Extreme Light Infrastructure - Attosecond Light Pulse Source, ELI-HU Non-Profit Ltd , Szeged , Hungary.,f Department of Oncotherapy , University of Szeged , Szeged , Hungary
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Tuboly E, Futakuchi M, Varga G, Érces D, Tőkés T, Mészáros A, Kaszaki J, Suzui M, Imai M, Okada A, Okada N, Boros M, Okada H. C5a inhibitor protects against ischemia/reperfusion injury in rat small intestine. Microbiol Immunol 2016; 60:35-46. [PMID: 26576826 PMCID: PMC4819679 DOI: 10.1111/1348-0421.12338] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Accepted: 11/11/2015] [Indexed: 11/28/2022]
Abstract
Acute mesenteric ischemia (AMI) is caused by considerable intestinal injury, which is associated with intestinal ischemia followed by reperfusion. To elucidate the mechanisms of ischemia/reperfusion injuries, a C5a inhibitory peptide termed AcPepA was used to examine the role of C5a anaphylatoxin, induction of inflammatory cells, and cell proliferation of the intestinal epithelial cells in an experimental AMI model. In this rat model, the superior mesenteric artery was occluded and subsequently reperfused (Induce‐I/R). Other groups were treated with AcPepA before ischemia or reperfusion. Induce‐I/R induced injuries in the intestine and AcPepA significantly decreased the proportion of severely injured villi. Induce‐I/R induced secondary receptor for C5a‐positive polymorphonuclear leukocytes in the vessels and CD204‐positive macrophages near the injured site; this was correlated with hypoxia‐induced factor 1‐alpha‐positive cells. Induction of these inflammatory cells was attenuated by AcPepA. In addition, AcPepA increased proliferation of epithelial cells in the villi, possibly preventing further damage. Therefore, Induce‐I/R activates C5a followed by the accumulation of polymorphonuclear leukocyte and hypoxia‐induced factor 1‐alpha‐producing macrophages, leading to villus injury. AcPepA, a C5a inhibitory peptide, blocks the deleterious effects of C5a, indicating it has a therapeutic effect on the inflammatory consequences of experimental AMI.
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Affiliation(s)
- Eszter Tuboly
- Institute of Surgical Research, Faculty of Medicine, University of Szeged, 6 Szőkefalvi-Nagy Béla Street, Szeged, 6720, Hungary
| | | | - Gabriella Varga
- Institute of Surgical Research, Faculty of Medicine, University of Szeged, 6 Szőkefalvi-Nagy Béla Street, Szeged, 6720, Hungary
| | - Daniel Érces
- Institute of Surgical Research, Faculty of Medicine, University of Szeged, 6 Szőkefalvi-Nagy Béla Street, Szeged, 6720, Hungary
| | - Tünde Tőkés
- Institute of Surgical Research, Faculty of Medicine, University of Szeged, 6 Szőkefalvi-Nagy Béla Street, Szeged, 6720, Hungary
| | - Andras Mészáros
- Institute of Surgical Research, Faculty of Medicine, University of Szeged, 6 Szőkefalvi-Nagy Béla Street, Szeged, 6720, Hungary
| | - József Kaszaki
- Institute of Surgical Research, Faculty of Medicine, University of Szeged, 6 Szőkefalvi-Nagy Béla Street, Szeged, 6720, Hungary
| | | | - Masaki Imai
- Department of Immunology, Graduate School of Medical Sciences, Nagoya City University, 1-Kawasumi, Mizuho-cho, Mizuho-ku, Nagoya, 467-8601
| | - Alan Okada
- Research Institute for Protein Science, 2-18 Nakayama-cho, Mizuho-ku, Nagoya, 467-0803, Japan
| | | | - Mihály Boros
- Institute of Surgical Research, Faculty of Medicine, University of Szeged, 6 Szőkefalvi-Nagy Béla Street, Szeged, 6720, Hungary
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Szabó ER, Plangár I, Tőkés T, Mán I, Polanek R, Kovács R, Fekete G, Szabó Z, Csenki Z, Baska F, Hideghéty K. l-Alpha Glycerylphosphorylcholine as a Potential Radioprotective Agent in Zebrafish Embryo Model. Zebrafish 2016; 13:481-488. [PMID: 27486826 DOI: 10.1089/zeb.2016.1269] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Abstract
This work establishes the zebrafish embryo model for ionizing radiation (IR) modifier research and also evaluates the protective effect of l-alpha glycerylphosphorylcholine (GPC). Embryos were exposed to a single-fraction whole-body gamma irradiation (5, 10, 15, and 20 Gy) at different postfertilization time points and were serially assessed for viability and macro- and micromorphologic abnormalities. After toxicity evaluation, 194 μM of GPC was added for certain groups with 3-h incubation before the radiation. Nuclear factor kappa B (NF-κB) and interleukin-1β (IL-1β) expression changes were measured using quantitative real-time polymerase chain reaction. A higher sensitivity could be observed at earlier stages of the embryogenesis. The lethal dose (LD50) for 6 hours postfertilization (hpf) embryos was 15 Gy and for 24 hpf was 20 Gy on day 7, respectively. GPC administration resulted in a significant improvement in both the distortion rate and survival of the 24 hpf embryos. Qualitative evaluation of the histological changes confirmed the protective effect of GPC. IL-1β and NF-κB overexpression due to 10 Gy irradiation was also reduced by GPC. GPC exhibited promising radioprotective effects in our zebrafish embryo model, decreasing the irradiation-induced morphological damage and lethality with significant reduction of IR-caused pro-inflammatory activation.
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Affiliation(s)
- Emília Rita Szabó
- 1 Attosecond Light Pulse Source, ELI-HU Nonprofit Ltd., Szeged, Hungary
| | - Imola Plangár
- 2 MTA-SE NAP B Cognitive Translational Behavioural Pharmacology Group, Department of Pharmacology and Pharmacotherapy, Semmelweis University , Budapest, Hungary
| | - Tünde Tőkés
- 1 Attosecond Light Pulse Source, ELI-HU Nonprofit Ltd., Szeged, Hungary .,3 Institute of Surgical Research, University of Szeged , Szeged, Hungary
| | - Imola Mán
- 4 Department of Oncotherapy, University of Szeged , Szeged, Hungary
| | - Róbert Polanek
- 1 Attosecond Light Pulse Source, ELI-HU Nonprofit Ltd., Szeged, Hungary
| | - Róbert Kovács
- 5 Institute of Aquaculture and Environmental Safety, Szent István University of Gödöllő , Gödöllő, Hungary
| | - Gábor Fekete
- 4 Department of Oncotherapy, University of Szeged , Szeged, Hungary
| | - Zoltán Szabó
- 1 Attosecond Light Pulse Source, ELI-HU Nonprofit Ltd., Szeged, Hungary .,4 Department of Oncotherapy, University of Szeged , Szeged, Hungary
| | - Zsolt Csenki
- 5 Institute of Aquaculture and Environmental Safety, Szent István University of Gödöllő , Gödöllő, Hungary
| | - Ferenc Baska
- 6 Department of Pathology and Forensic Veterinary Medicine, Szent István University , Budapest, Hungary
| | - Katalin Hideghéty
- 1 Attosecond Light Pulse Source, ELI-HU Nonprofit Ltd., Szeged, Hungary .,4 Department of Oncotherapy, University of Szeged , Szeged, Hungary
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Tőkés T, Tuboly E, Varga G, Major L, Ghyczy M, Kaszaki J, Boros M. Protective effects of L-alpha-glycerylphosphorylcholine on ischaemia-reperfusion-induced inflammatory reactions. Eur J Nutr 2014; 54:109-18. [PMID: 24682350 DOI: 10.1007/s00394-014-0691-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2013] [Accepted: 03/20/2014] [Indexed: 02/07/2023]
Abstract
PURPOSE Choline-containing dietary phospholipids, including phosphatidylcholine (PC), may function as anti-inflammatory substances, but the mechanism remains largely unknown. We investigated the effects of L-alpha-glycerylphosphorylcholine (GPC), a deacylated PC derivative, in a rodent model of small intestinal ischaemia-reperfusion (IR) injury. METHODS Anaesthetized Sprague-Dawley rats were divided into control, mesenteric IR (45 min mesenteric artery occlusion, followed by 180 min reperfusion), IR with GPC pretreatment (16.56 mg kg⁻¹ GPC i.v., 5 min prior to ischaemia) or IR with GPC post-treatment (16.56 mg kg⁻¹ GPC i.v., 5 min prior to reperfusion) groups. Macrohaemodynamics and microhaemodynamic parameters were measured; intestinal inflammatory markers (xanthine oxidoreductase activity, superoxide and nitrotyrosine levels) and liver ATP contents were determined. RESULTS The IR challenge reduced the intestinal intramural red blood cell velocity, increased the mesenteric vascular resistance, the tissue xanthine oxidoreductase activity, the superoxide production, and the nitrotyrosine levels, and the ATP content of the liver was decreased. Exogenous GPC attenuated the macro- and microcirculatory dysfunction and provided significant protection against the radical production resulting from the IR stress. The GPC pretreatment alleviated the hepatic ATP depletion, the reductions in the mean arterial pressure and superior mesenteric artery flow, and similarly to the post-treatments with GPC, also decreased the xanthine oxidoreductase activity, the intestinal superoxide production, the nitrotyrosine level, and normalized the microcirculatory dysfunction. CONCLUSIONS These data demonstrate the effectiveness of GPC therapies and provide indirect evidence that the anti-inflammatory effects of PC could be linked to a reaction involving the polar part of the molecule.
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Affiliation(s)
- Tünde Tőkés
- Institute of Surgical Research, University of Szeged, Pécsi u. 6., Szeged, 6720, Hungary
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Plangár I, Tőkés T, Mán I, Szabó E, Vécsei L, Hideghéty K. Radio-neuroprotective effect of a phosphatidylcholine derivative in a rat model of irradiation. J Neurol Sci 2013. [DOI: 10.1016/j.jns.2013.07.2363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Tőkés T, Varga G, Garab D, Nagy Z, Fekete G, Tuboly E, Plangár I, Mán I, Szabó RE, Szabó Z, Volford G, Ghyczy M, Kaszaki J, Boros M, Hideghéty K. Peripheral inflammatory activation after hippocampus irradiation in the rat. Int J Radiat Biol 2013; 90:1-6. [DOI: 10.3109/09553002.2013.836617] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Hideghéty K, Plangár I, Mán I, Fekete G, Nagy Z, Volford G, Tőkés T, Szabó E, Szabó Z, Brinyiczki K, Mózes P, Németh I. Development of a small-animal focal brain irradiation model to study radiation injury and radiation-injury modifiers. Int J Radiat Biol 2013; 89:645-55. [DOI: 10.3109/09553002.2013.784424] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Kovács T, Varga G, Erces D, Tőkés T, Tiszlavicz L, Ghyczy M, Vécsei L, Boros M, Kaszaki J. [Comparative study of novel therapeutic possibilities in animal experimental model of inflammatory bowel disease]. Magy Seb 2012; 65:191-7. [PMID: 22940387 DOI: 10.1556/maseb.65.2012.4.4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
INTRODUCTION The consequence of inflammatory bowel diseases (IBD) is cytokine-mediated severe local tissue damage. Our aim was to determine the extent of inflammatory response and to influence the morphologic changes during the subacute phase of trinitro-benzene sulfonic acid (TNBS)-induced experimental colitis by oral phosphatidylcholine (PC) and N-methyl-D-aspartate (NMDA) receptor antagonist kynurenic acid therapy. METHODS Sprague-Dawley rats were randomized to control, untreated colitis (ic TNBS), colitis fed with 2% PC-containing diet (3 days pre-treatment +3 days treatment after TNBS induction), colitis with kynurenic acid treatment (on day 6, n = 7) groups. The colitis was characterized by tissue myeloperoxidase and plasma TNF-alpha levels, the extent of tissue damage, structural changes in microvasculature (FITC-dextran staining) and mucosal injury (acridine orange staining) were determined by in vivo confocal laser scanning endomicroscopy (Optiscan Five1, Australia) and conventional histology (hematoxyilin-eosin staining). RESULTS Significant elevation in myeloperoxidase and TNF-alpha levels with remarkable damage in epithelial structure was detected in the colitis group. Both treatment regimens significantly decreased the level of inflammatory activation but only PC pretreatment could preserve the number of goblet cells and the epithelial structure. Treatment with kynurenic acid did not alter the morphology changes. CONCLUSION Oral PC pretreatment is a promising possibility in the therapy of IBDs through decreasing inflammatory reaction and increasing the number of goblet cells.
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Affiliation(s)
- Tamás Kovács
- Szegedi Tudományegyetem, Általános Orvostudományi Kar Gyermekklinika, Gyermeksebészeti Osztály Szeged
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Érces D, Varga G, Fazekas B, Kovács T, Tőkés T, Tiszlavicz L, Fülöp F, Vécsei L, Boros M, Kaszaki J. N-methyl-d-aspartate receptor antagonist therapy suppresses colon motility and inflammatory activation six days after the onset of experimental colitis in rats. Eur J Pharmacol 2012; 691:225-34. [DOI: 10.1016/j.ejphar.2012.06.044] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2011] [Revised: 06/25/2012] [Accepted: 06/27/2012] [Indexed: 12/21/2022]
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