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Hejníková M, Tomčala A, Černý J, Kodrík D. Melittin-The principal toxin of honeybee venom-Is also produced in the honeybee fat body. Comp Biochem Physiol C Toxicol Pharmacol 2024; 281:109928. [PMID: 38649084 DOI: 10.1016/j.cbpc.2024.109928] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Revised: 04/08/2024] [Accepted: 04/19/2024] [Indexed: 04/25/2024]
Abstract
Melittin is a powerful toxin present in honeybee venom that is active in a wide range of animals, from insects to humans. Melittin exerts numerous biological, toxicological, and pharmacological effects, the most important of which is destruction of the cell membrane. The phospholipase activity of melittin and its ability to activate phospholipases in the venom contribute to these actions. Using analytical methods, we discovered that the honeybee Apis mellifera produces melittin not only in the venom gland but also in its fat body cells, which remain resistant to this toxin's effects. We suggest that melittin acts as an anti-bacterial agent, since its gene expression is significantly upregulated when honeybees are infected with Escherichia coli and Listeria monocytogenes bacteria; additionally, melittin effectively kills these bacteria in the disc diffusion test. We hypothesize that the chemical and physicochemical properties of the melittin molecule (hydrophilicity, lipophilicity, and capacity to form tetramers) in combination with reactive conditions (melittin concentration, salt concentration, pH, and temperature) are responsible for the targeted destruction of bacterial cells and apparent tolerance towards own tissue cells. Considering that melittin is an important current and, importantly, potential broad-spectrum medication, a thorough understanding of the observed phenomena may significantly increase its use in clinical practice.
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Affiliation(s)
- Markéta Hejníková
- Institute of Entomology, Biology Centre, CAS, Branišovská 31, 370 05 České Budějovice, Czech Republic
| | - Aleš Tomčala
- University of South Bohemia, Faculty of Fisheries and Protection of Water, CENAKVA, Institute of Aquaculture and Protection of Waters, Na Sádkách 1780, 370 05 České Budějovice, Czech Republic
| | - Jan Černý
- Institute of Entomology, Biology Centre, CAS, Branišovská 31, 370 05 České Budějovice, Czech Republic; University of South Bohemia, Faculty of Science, Branišovská 31, 370 05 České Budějovice, Czech Republic
| | - Dalibor Kodrík
- Institute of Entomology, Biology Centre, CAS, Branišovská 31, 370 05 České Budějovice, Czech Republic; University of South Bohemia, Faculty of Science, Branišovská 31, 370 05 České Budějovice, Czech Republic.
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Pačes J, Grobárová V, Zadražil Z, Knížková K, Malinská N, Tušková L, Boes M, Černý J. Correction: MHC II-EGFP Knock-in Mouse Model. Curr Protoc 2024; 4:e1050. [PMID: 38651667 DOI: 10.1002/cpz1.1050] [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: 04/25/2024]
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Gebauer T, Gebauer R, Císař P, Černý J, Roy DR, Zare M, Verleih M, Stejskal V, Rebl A. Are bold-shy personalities of European perch (Perca fluviatilis) linked to stress tolerance and immunity? A scope of harnessing fish behavior in aquaculture. Fish Shellfish Immunol 2023; 143:109190. [PMID: 37890737 DOI: 10.1016/j.fsi.2023.109190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 10/20/2023] [Accepted: 10/24/2023] [Indexed: 10/29/2023]
Abstract
The sensitivity to stress and its impact on immunity are supposedly related to a fish's personality. In the present study, European perch (Perca fluviatilis) were exposed to an open-field and a novel-object test to identify distinctive shy and bold individuals. This series of cognitive tests revealed clear differences between proactive individuals with pronounced exploration behavior (bold personality) and reactive individuals that took a freeze-hide position (shy personality). A cohort of shy and bold perch was then exposed to elevated stocking density. Frozen activity and lower explorative behavior were related to higher basal and stocking-induced cortisol levels compared to proactive individuals. Since cortisol is a well-known modulator of immune-gene expression, we used multiplex real-time PCR to profile the differential immune responses to the intraperitoneal injection of Aeromonas hydrophila in the head kidney and peritoneal cells of bold and shy perch individuals. These expression differences between stimulated bold and shy perch were generally modest, except for the genes encoding the complement component c3 and the matrix metallopeptidase mmp9. The strong differential expression of these two bactericidal and inflammatory genes in the context of the modestly regulated features suggests that a fish's personality is linked to a particular immune-defense strategy. In conclusion, our approach, based on behavioral video observations, phagocytosis and enzyme assays, immunogene-expression profiling, and quantification of stress-relevant metabolites, revealed indications for divergent coping styles in cohorts of bold or shy European perch. This divergence could be exploited in future selective breeding programs.
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Affiliation(s)
- Tatyana Gebauer
- University of South Bohemia in České Budějovice, Faculty of Fisheries and Protection of Waters, South Bohemian Research Centre of Aquaculture and Biodiversity of Hydrocenoses, Institute of Aquaculture and Protection of Waters, 370 05, České Budějovice, Czech Republic.
| | - Radek Gebauer
- University of South Bohemia in České Budějovice, Faculty of Fisheries and Protection of Waters, South Bohemian Research Centre of Aquaculture and Biodiversity of Hydrocenoses, Institute of Aquaculture and Protection of Waters, 370 05, České Budějovice, Czech Republic
| | - Petr Císař
- University of South Bohemia in České Budějovice, Faculty of Fisheries and Protection of Waters, CENAKVA, Institute of Complex Systems, Laboratory of Signal and Image Processing, 373 33, Nové Hrady, Czech Republic
| | - Jan Černý
- University of South Bohemia in České Budějovice, Faculty of Fisheries and Protection of Waters, South Bohemian Research Centre of Aquaculture and Biodiversity of Hydrocenoses, Institute of Aquaculture and Protection of Waters, 370 05, České Budějovice, Czech Republic
| | - Deepali Rahi Roy
- University of South Bohemia in České Budějovice, Faculty of Fisheries and Protection of Waters, South Bohemian Research Centre of Aquaculture and Biodiversity of Hydrocenoses, Institute of Aquaculture and Protection of Waters, 370 05, České Budějovice, Czech Republic
| | - Mahyar Zare
- University of South Bohemia in České Budějovice, Faculty of Fisheries and Protection of Waters, South Bohemian Research Centre of Aquaculture and Biodiversity of Hydrocenoses, Institute of Aquaculture and Protection of Waters, 370 05, České Budějovice, Czech Republic
| | - Marieke Verleih
- Research Institute for Farm Animal Biology (FBN), Institute of Genome Biology, Fish Genetics Unit, 18196, Dummerstorf, Germany
| | - Vlastimil Stejskal
- University of South Bohemia in České Budějovice, Faculty of Fisheries and Protection of Waters, South Bohemian Research Centre of Aquaculture and Biodiversity of Hydrocenoses, Institute of Aquaculture and Protection of Waters, 370 05, České Budějovice, Czech Republic
| | - Alexander Rebl
- Research Institute for Farm Animal Biology (FBN), Institute of Genome Biology, Fish Genetics Unit, 18196, Dummerstorf, Germany.
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Pačes J, Grobárová V, Zadražil Z, Knížková K, Malinská N, Tušková L, Boes M, Černý J. MHC II-EGFP Knock-in Mouse Model. Curr Protoc 2023; 3:e925. [PMID: 37934124 DOI: 10.1002/cpz1.925] [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] [Indexed: 11/08/2023]
Abstract
The MHC II-EGFP knock-in mouse model enables us to visualize and track MHC-II-expressing cells in vivo by expressing enhanced green fluorescent protein (EGFP) fused to the MHC class II molecule under the MHC II beta chain promoter. Using this model, we can easily identify MHC-II-expressing cells, including dendritic cells, B cells, macrophages, and ILC3s, which play a key role as antigen-presenting cells (APCs) for CD4+ T cells. In addition, we can also precisely identify and analyze APC-containing tissues and organs. Even after fixation, EGFP retains its fluorescence, so this model is suitable for immunofluorescence studies, facilitating an unbiased characterization of the histological context, especially with techniques such as light-sheet fluorescence microscopy. Furthermore, the MHC II-EGFP knock-in mouse model is valuable for studying the molecular mechanisms of MHC II gene regulation and expression by making it possible to correlate MHC II expression (MHC II-EGFP) with surface fraction through antibody detection, thereby shedding light on the intricate regulation of MHC II expression. Overall, this model is an essential asset for quantitative and systems immunological research, providing insights into immune cell dynamics and localization, with a tool for precise cell identification and with the ability to study MHC II gene regulation, thus furthering the understanding of immune responses and underlying mechanisms © 2023 The Authors. Current Protocols published by Wiley Periodicals LLC. Basic Protocol 1: Characterization of antigen-specific MHC II loading compartment tubulation toward the immunological synapse Basic Protocol 2: Characterization of overall versus surface MHC II expression Basic Protocol 3: Identification and preparation of the lymphoid organs Basic Protocol 4: Quantification of APC content in lymphoid organs by fluorescence stereomicroscopy Basic Protocol 5: Quantification and measurement of intestinal lymphoid tissue by light-sheet fluorescence stereomicroscopy Basic Protocol 6: Visualization of corneal APCs Basic Protocol 7: Quantification of MHC II+ cells in maternal milk by flow cytometry Support Protocol 1: Cell surface staining and flow cytometry analysis of spleen mononuclear cells.
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Affiliation(s)
- Jan Pačes
- Laboratory of Cell Immunology, Department of Cell Biology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Valéria Grobárová
- Laboratory of Cell Immunology, Department of Cell Biology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Zdeněk Zadražil
- Laboratory of Cell Immunology, Department of Cell Biology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Karolina Knížková
- Laboratory of Cell Immunology, Department of Cell Biology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Nikola Malinská
- Laboratory of Cell Immunology, Department of Cell Biology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Liliana Tušková
- Laboratory of Cell Immunology, Department of Cell Biology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Marianne Boes
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Jan Černý
- Laboratory of Cell Immunology, Department of Cell Biology, Faculty of Science, Charles University, Prague, Czech Republic
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Mareček L, Melichar R, Černý J, Schnabl P, Hrdličková K, Buriánek D. Non-coaxial deformation of foreland basement involved in a fold-and-thrust belt: a strain partitioning approach to the Eastern Variscan orogen. Sci Rep 2023; 13:8143. [PMID: 37208470 DOI: 10.1038/s41598-023-35400-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Accepted: 05/17/2023] [Indexed: 05/21/2023] Open
Abstract
The general SW-NE course of the Variscan orogen in Europe is abruptly bent to the N-S course at its eastern margin, where an oblique convergence occurred. The main suture in this part of the Variscan orogenic belt is called the Moldanubian Thrust, characterized by a dominant dextral strike-slip kinematics and a minor thrust component. The deep level of erosion and the good exposure of this structure allowed us to study the mechanisms of oblique convergence and the incorporation of the foreland basement into the orogenic belt. The combination of small-scale structures with the anisotropy of magnetic susceptibility studies allowed the recognition of two deformations in the studied rocks: dextral simple shearing and drag folding. Due to oblique convergence, the deformations induced by this mechanism were non-coaxial; therefore, their contributions can be easily distinguished. Finally, an overturned, almost recumbent large-scale synformal fold structure in the footwall and an antiformal structure in the hanging wall of the Moldanubian Thrust were formed. These two folds can be interpreted as structures formed by dragging along the Moldanubian Thrust. The previously described sinistral simple shearing in the upper limb of the synform resulted from the original dextral strike-slip shearing, which was overturned during progressive deformation.
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Affiliation(s)
- L Mareček
- Department of Geological Sciences, Faculty of Science, Masaryk University, Brno, Czech Republic.
| | - R Melichar
- Department of Geological Sciences, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - J Černý
- Department of Geological Sciences, Faculty of Science, Masaryk University, Brno, Czech Republic
- Institute of Geology of the Czech Academy of Sciences, Rozvojová 269, 165 00, Prague-Lysolaje, Czech Republic
- Helmholtz-Zentrum Dresden-Rossendorf, Helmholtz-Institute Freiberg for Resource Technology, Freiberg, Germany
| | - P Schnabl
- Institute of Geology of the Czech Academy of Sciences, Rozvojová 269, 165 00, Prague-Lysolaje, Czech Republic
| | - K Hrdličková
- Czech Geological Survey, Klárov 3, 118 21, Prague 1, Czech Republic
| | - D Buriánek
- Czech Geological Survey, Klárov 3, 118 21, Prague 1, Czech Republic
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Brejcha M, Prušáková D, Sábová M, Peska V, Černý J, Kodrík D, Konopová B, Čapková Frydrychová R. Seasonal changes in ultrastructure and gene expression in the fat body of worker honey bees. J Insect Physiol 2023; 146:104504. [PMID: 36935036 DOI: 10.1016/j.jinsphys.2023.104504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 01/19/2023] [Accepted: 03/14/2023] [Indexed: 06/18/2023]
Abstract
The anatomical, physiological, and behavioral characteristics of honey bees are affected by the season as well as division of labor. In this study, we examined the structure, ultrastructure, and gene expression of fat body cells in both long-lived winter and short-lived summer worker bees (the youngest stage of hive bees and forager bees). In contrast to hive bees, foragers and winter bees have a higher metabolism due to intensive muscle activity during their flight (foragers) or endothermic heat production (winter bees). These workers differ from hive bees in the biology of their mitochondria, peroxisomes, and lysosomes as well as in the expression of the genes involved in lipid, carbohydrate, amino acid metabolism, insulin, and TGF- β signaling. Additionally, the expression of genes related to phospholipid metabolism was higher in the hive bees. However, we found no differences between workers in the expression of genes controlling cell organelles, such as the Golgi apparatus, endoplasmic reticulum, ribosomes, nucleus, and vacuoles, as well as genes for DNA replication, cell cycle control, and autophagy. Furthermore, lysosomes, autophagic processes and lipofuscin particles were more frequently observed in winter bees using electron microscopy.
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Affiliation(s)
- Miloslav Brejcha
- Biology Centre of the Czech Academy of Sciences, Institute of Entomology, Branišovská 31, 370 05 České Budějovice, Czech Republic; Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05 České Budějovice, Czech Republic
| | - Daniela Prušáková
- Biology Centre of the Czech Academy of Sciences, Institute of Entomology, Branišovská 31, 370 05 České Budějovice, Czech Republic; Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05 České Budějovice, Czech Republic
| | - Michala Sábová
- Biology Centre of the Czech Academy of Sciences, Institute of Entomology, Branišovská 31, 370 05 České Budějovice, Czech Republic
| | - Vratislav Peska
- Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, 612 65 Brno, Czech Republic
| | - Jan Černý
- Biology Centre of the Czech Academy of Sciences, Institute of Entomology, Branišovská 31, 370 05 České Budějovice, Czech Republic; Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05 České Budějovice, Czech Republic
| | - Dalibor Kodrík
- Biology Centre of the Czech Academy of Sciences, Institute of Entomology, Branišovská 31, 370 05 České Budějovice, Czech Republic; Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05 České Budějovice, Czech Republic
| | - Barbora Konopová
- Biology Centre of the Czech Academy of Sciences, Institute of Entomology, Branišovská 31, 370 05 České Budějovice, Czech Republic; Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05 České Budějovice, Czech Republic
| | - Radmila Čapková Frydrychová
- Biology Centre of the Czech Academy of Sciences, Institute of Entomology, Branišovská 31, 370 05 České Budějovice, Czech Republic; Faculty of Science, University of South Bohemia, Branišovská 1760, 370 05 České Budějovice, Czech Republic.
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Soukup J, Černý J, Novotný T. [Acute Traumatic Intervertebral Disc Herniation]. Acta Chir Orthop Traumatol Cech 2023; 90:283-287. [PMID: 37690042] [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: 09/12/2023]
Abstract
Acute traumatic intervertebral disc herniation of the thoracic spine is a rather rare injury with only a few reported cases to date. In this manuscript, we present a case of a 58-year-old male patient who sustained a car accident-related high-energy trauma, resulting in a disc herniation of the thoracic spine. Furthermore, we also discuss the possible implications of late diagnosis of such condition. The patient was initially referred from the Emergency Department as a case of head contusion with a left upper limb paresis. Due to only minimal bony trauma visible on the initial spine CT scan, the neurological deficit was attributed to the cranial trauma. The diagnosis of a traumatic disc herniation was therefore established only after the rapid onset of paraparesis, which gradually progressed into paraplegia, and a following spine MRI scan. Despite the subsequent urgent spinal decompression, the neurological functions of the lower limbs were not restored. This manuscript addresses the indications for performing MRI scans in polytrauma patients with a CT-verified spine trauma. Although it may be complicated to perform routine MRI scans in all such patients in daily practice, it can certainly help diagnose such injuries earlier and thus prevent potential permanent neurological damage to the patients. Key word: spine injury, traumatic disc herniation, thoracic spine, spine surgery.
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Affiliation(s)
- J Soukup
- Ortopedická klinika Fakulty zdravotnických studií Univerzity J. E. Purkyně v Ústí nad Labem a Krajské zdravotní, a.s. - Masarykovy nemocnice v Ústí nad Labem, o.z
- Klinika rehabilitace a tělovýchovného lékařství 2. lékařské fakulty Univerzity Karlovy a Fakultní nemocnice v Motole, Praha
| | - J Černý
- Ortopedická klinika Fakulty zdravotnických studií Univerzity J. E. Purkyně v Ústí nad Labem a Krajské zdravotní, a.s. - Masarykovy nemocnice v Ústí nad Labem, o.z
| | - T Novotný
- Ortopedická klinika Fakulty zdravotnických studií Univerzity J. E. Purkyně v Ústí nad Labem a Krajské zdravotní, a.s. - Masarykovy nemocnice v Ústí nad Labem, o.z
- Ortopedická klinika Lékařské fakulty Univerzity Karlovy a Fakultní nemocnice Hradec Králové
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Pačes J, Knížková K, Tušková L, Grobárová V, Zadražil Z, Boes M, Černý J. MHC II - EGFP knock-in mouse model is a suitable tool for systems and quantitative immunology. Immunol Lett 2022; 251-252:75-85. [PMID: 36332824 DOI: 10.1016/j.imlet.2022.10.007] [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: 06/30/2022] [Revised: 10/27/2022] [Accepted: 10/28/2022] [Indexed: 11/09/2022]
Abstract
Immunology is a rapidly evolving field of research with sophisticated models and methods. However, detailed data on total immune cell counts and population distributions remain surprisingly scarce. Nevertheless, recently established quantitative approaches could help us understand the overall complexity of the immune system. Here, we studied a major histocompatibility complexclass II - enhanced green fluorescent protein knock-in mouse model to precisely identify and manipulate lymphoid structures. By combining flow cytometry with light sheet microscopy, we quantified MHC II+ populations of the small intestine and associated individual mesenteric lymph nodes, with 36.7 × 106 cells in lamina propria, 3.0 × 105 cells in scattered lymphoid tissue and 1.1 × 106 cells in Peyer's patches. In addition to these whole-organ cell counts, we assessed approximately 1 × 106 total villi in the small intestine and 450 scattered lymphoid tissue follicles. By direct noninvasive microscopic observation of a naturally fully translucent mouse organ, the cornea, we quantified 12 ± 4 and 35 ± 7 cells/mm2 Langerhans- and macrophage-like populations, respectively. Ultimately, our findings show that flow cytometry with quantitative imaging data analysis enables us to avoid methodological discrepancies while gaining new insights into the relevance of organ-specific quantitative approaches for immunology.
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Affiliation(s)
- Jan Pačes
- Laboratory of Cell Immunology, Department of Cell Biology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Karolina Knížková
- Laboratory of Cell Immunology, Department of Cell Biology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Liliana Tušková
- Laboratory of Cell Immunology, Department of Cell Biology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Valéria Grobárová
- Laboratory of Cell Immunology, Department of Cell Biology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Zdeněk Zadražil
- Laboratory of Cell Immunology, Department of Cell Biology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Marianne Boes
- Center for Translational Immunology, University Medical Center Utrecht, Utrecht, the Netherlands
| | - Jan Černý
- Laboratory of Cell Immunology, Department of Cell Biology, Faculty of Science, Charles University, Prague, Czech Republic.
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Štěpánek O, Čmoková A, Procházková E, Grobárová V, Černý J, Sklapničková M, Zíková AP, Kolařík M, Baszczynski O. Piperazine‐modified ketoconazole derivatives show increased activity against fungal and trypanosomatid pathogens. ChemMedChem 2022; 17:e202200385. [DOI: 10.1002/cmdc.202200385] [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: 07/15/2022] [Revised: 09/14/2022] [Indexed: 11/06/2022]
Affiliation(s)
- Ondřej Štěpánek
- Charles University: Univerzita Karlova Department of Organic Chemistry CZECH REPUBLIC
| | - Adéla Čmoková
- Institute of Microbiology Mikrobiologický ústav AV ČR, v.v.i. CZECH REPUBLIC
| | - Eliška Procházková
- IOCB CAS: Ustav organicke chemie a biochemie Akademie ved Ceske republiky NMR department CZECH REPUBLIC
| | - Valéria Grobárová
- Charles University: Univerzita Karlova Department of Cell Biology CZECH REPUBLIC
| | - Jan Černý
- Charles University: Univerzita Karlova Department of Cell Biology CZECH REPUBLIC
| | - Martina Sklapničková
- Institute of Parasitology Czech Academy of Sciences: Biologicke centrum Akademie ved Ceske republiky Parazitologicky ustav Parazitologicky ustav CZECH REPUBLIC
| | - Alena Panicucci Zíková
- Institute of Parasitology Czech Academy of Sciences: Biologicke centrum Akademie ved Ceske republiky Parazitologicky ustav Parazitologicky ustav CZECH REPUBLIC
| | - Miroslav Kolařík
- Institute of Microbiology Czech Academy of Sciences: Mikrobiologicky ustav Akademie ved Ceske republiky Mikrobiologicky ustav CZECH REPUBLIC
| | - Ondrej Baszczynski
- Univerzita Karlova Prirodovedecka fakulta Department of Organic Chemistry Hlavova 8/2030 12800 Prague CZECH REPUBLIC
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Černý J, Weyda F, Perlík M, Kodrík D. Functional Ultrastructure of Hymenopteran Stingers: Devastating Spear or Delicate Syringe. Microsc Microanal 2022; 28:1-11. [PMID: 35616227 DOI: 10.1017/s1431927622000800] [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] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
In this study, we tested the hypothesis that a micro-serrated edge on the honey bee Apis mellifera stinger tip serves as a tool for more intensive crushing of cell membranes in the victim's tissues. This could have mechanical consequences as well as initiate metabolic pathways linked to cell membrane breakdown (e.g., production of biogenic amines). Accordingly, we found that hymenopteran species that use their stingers as an offensive or defensive weapon to do as much damage to the victim's body as possible had this cuticular microstructure. In parasitic hymenopterans, on the other hand, this structure was missing, as stingers are solely used to delicately transport venom to the victim's body in order to do little mechanical harm. We also demonstrated that the stinger lancets of the honey bee A. mellifera are living organs with sensilla innervated by sensory neurons and containing other essential tissues, rather than mere cuticular structures.
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Affiliation(s)
- Jan Černý
- Institute of Entomology, Biology Centre, CAS, Branišovská 31, 370 05 České Budějovice, Czech Republic
- Faculty of Science, University of South Bohemia, Branišovská 31, 370 05 České Budějovice, Czech Republic
| | - František Weyda
- Faculty of Science, University of South Bohemia, Branišovská 31, 370 05 České Budějovice, Czech Republic
| | - Michal Perlík
- Institute of Entomology, Biology Centre, CAS, Branišovská 31, 370 05 České Budějovice, Czech Republic
- Faculty of Science, University of South Bohemia, Branišovská 31, 370 05 České Budějovice, Czech Republic
| | - Dalibor Kodrík
- Institute of Entomology, Biology Centre, CAS, Branišovská 31, 370 05 České Budějovice, Czech Republic
- Faculty of Science, University of South Bohemia, Branišovská 31, 370 05 České Budějovice, Czech Republic
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Bodláková K, Černý J, Štěrbová H, Guráň R, Zítka O, Kodrík D. Insect Body Defence Reactions against Bee Venom: Do Adipokinetic Hormones Play a Role? Toxins (Basel) 2021; 14:toxins14010011. [PMID: 35050987 PMCID: PMC8780464 DOI: 10.3390/toxins14010011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 12/17/2021] [Accepted: 12/20/2021] [Indexed: 11/30/2022] Open
Abstract
Bees originally developed their stinging apparatus and venom against members of their own species from other hives or against predatory insects. Nevertheless, the biological and biochemical response of arthropods to bee venom is not well studied. Thus, in this study, the physiological responses of a model insect species (American cockroach, Periplaneta americana) to honeybee venom were investigated. Bee venom toxins elicited severe stress (LD50 = 1.063 uL venom) resulting in a significant increase in adipokinetic hormones (AKHs) in the cockroach central nervous system and haemolymph. Venom treatment induced a large destruction of muscle cell ultrastructure, especially myofibrils and sarcomeres. Interestingly, co-application of venom with cockroach Peram-CAH-II AKH eliminated this effect. Envenomation modulated the levels of carbohydrates, lipids, and proteins in the haemolymph and the activity of digestive amylases, lipases, and proteases in the midgut. Bee venom significantly reduced vitellogenin levels in females. Dopamine and glutathione (GSH and GSSG) insignificantly increased after venom treatment. However, dopamine levels significantly increased after Peram-CAH-II application and after co-application with bee venom, while GSH and GSSG levels immediately increased after co-application. The results suggest a general reaction of the cockroach body to bee venom and at least a partial involvement of AKHs.
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Affiliation(s)
- Karolina Bodláková
- Biology Centre, Institute of Entomology, CAS, Branišovská 31, 370 05 Ceske Budejovice, Czech Republic; (K.B.); (J.Č.); (H.Š.)
- Faculty of Science, University of South Bohemia, Branišovská 31a, 370 05 Ceske Budejovice, Czech Republic
| | - Jan Černý
- Biology Centre, Institute of Entomology, CAS, Branišovská 31, 370 05 Ceske Budejovice, Czech Republic; (K.B.); (J.Č.); (H.Š.)
- Faculty of Science, University of South Bohemia, Branišovská 31a, 370 05 Ceske Budejovice, Czech Republic
| | - Helena Štěrbová
- Biology Centre, Institute of Entomology, CAS, Branišovská 31, 370 05 Ceske Budejovice, Czech Republic; (K.B.); (J.Č.); (H.Š.)
| | - Roman Guráň
- Department of Chemistry and Biochemistry, Faculty of AgriSciences, Mendel University in Brno, Zemědělská 1665/1, 613 00 Brno, Czech Republic; (R.G.); (O.Z.)
- Central European Institute of Technology, Brno University of Technology, Purkyňova 656/123, 612 00 Brno, Czech Republic
| | - Ondřej Zítka
- Department of Chemistry and Biochemistry, Faculty of AgriSciences, Mendel University in Brno, Zemědělská 1665/1, 613 00 Brno, Czech Republic; (R.G.); (O.Z.)
- Central European Institute of Technology, Brno University of Technology, Purkyňova 656/123, 612 00 Brno, Czech Republic
| | - Dalibor Kodrík
- Biology Centre, Institute of Entomology, CAS, Branišovská 31, 370 05 Ceske Budejovice, Czech Republic; (K.B.); (J.Č.); (H.Š.)
- Faculty of Science, University of South Bohemia, Branišovská 31a, 370 05 Ceske Budejovice, Czech Republic
- Correspondence:
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Černý J, Potančok M, Castro Hernandez E. Toward a typology of weak-signal early alert systems: functional early warning systems in the post-COVID age. OIR 2021. [DOI: 10.1108/oir-11-2020-0513] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
PurposeThe study aims to expand on the concept of an early warning system (EWS) by introducing weak-signal detection, human-in-the-loop (HIL) verification and response tuning as integral parts of an EWS's design.Design/methodology/approachThe authors bibliographically highlight the evolution of EWS over the last 30+ years, discuss instances of EWSs in various types of organizations and industries and highlight limitations of current systems.FindingsProposed system to be used in the transforming of weak signals to early warnings and associated weak/strong responses.Originality/valueThe authors contribute to existing literature by presenting (1) novel approaches to dealing with some of the well-known issues associated with contemporary EWS and (2) an event-agnostic heuristic for dealing with weak signals.Peer reviewThe peer review history for this article is available at: https://publons.com/publon/10.1108/OIR-11-2020-0513.
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Nebeská D, Pidlisnyuk V, Stefanovska T, Trögl J, Shapoval P, Popelka J, Černý J, Medkow A, Kvak V, Malinská H. Impact of plant growth regulators and soil properties on Miscanthus x giganteus biomass parameters and uptake of metals in military soils. Rev Environ Health 2019; 34:283-291. [PMID: 31318698 DOI: 10.1515/reveh-2018-0088] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [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: 12/09/2018] [Accepted: 05/20/2019] [Indexed: 06/10/2023]
Abstract
The impact of plant growth regulators (PGRs) "Stimpo" and "Regoplant" on Miscanthus x giganteus (Mxg) biomass parameters was investigated when the plant was grown in military soils with different properties from Dolyna, Ukraine and Hradcany, Czech Republic. The results showed that PGRs positively influenced the biomass parameters when the plant was grown in soil in Dolyna with good agricultural characteristics, the influence of "Regoplant" was higher and the best results were obtained with combined treatment: application to rhizomes before planting and spraying on the biomass during vegetation. Using of PGRs did not improve the biomass parameters when the plant was grown in poor soil in Hradcany. In parallel the peculiarities of the metals uptake process were studied for the following metals: chromium (Cr), manganese (Mn), nickel (Ni), copper (Cu), zinc (Zn), strontium (Sr) and lead (Pb). The uptake behavior of the monitored elements differed based on the soil quality. According to the bioconcentration factor uptake of the abiogenic elements, Cr and Pb, was dominant in the plant roots in both soils, whereas Ni was not detected in any plant tissues. The behavior of biogenic elements (Mn, Cu, Zn) and their analogs (Sr) was different. Those elements were more intensively taken up in shoot tissues in low-nutrient sandy Hradcany soils, while they were mainly taken up in plant roots in fertile Dolyna soils. The unusual behavior of biogenic elements in the low-nutrient soils may be explained by the effect of stress. However, more research is needed focused mainly on soil properties and nutrient availability in order to confirm or disprove this hypothesis and to explore the cause of the stress. The summarized results here show that soil properties influenced Mxg biomass parameters, affected the uptake behavior of metals significantly and tested PGRs cannot be utilized universally in the production of Mxg in the poor military soils.
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Affiliation(s)
- Diana Nebeská
- Faculty of Environment, Jan Evangelista Purkyně University in Ústí nad Labem, Ústí nad Labem, Czech Republic
| | - Valentina Pidlisnyuk
- Faculty of Environment, Jan Evangelista Purkyně University in Ústí nad Labem, Ústí nad Labem, Czech Republic
| | - Tatyana Stefanovska
- Faculty of Plant Protection, Biotechnology and Ecology, National University of Life and Environmental Sciences, Kiev, Ukraine
| | - Josef Trögl
- Faculty of Environment, Jan Evangelista Purkyně University in Ústí nad Labem, Ústí nad Labem, Czech Republic
| | - Pavlo Shapoval
- Institute of Chemistry and Chemical Technologies, Lviv Polytechnic National University, Lviv, Ukraine
| | - Jan Popelka
- Faculty of Environment, Jan Evangelista Purkyně University in Ústí nad Labem, Ústí nad Labem, Czech Republic
| | - Jan Černý
- Faculty of Social and Economic Studies, Jan Evangelista Purkyně University in Ústí nad Labem, Ústí nad Labem, Czech Republic
| | - Artem Medkow
- Faculty of Plant Protection, Biotechnology and Ecology, National University of Life and Environmental Sciences, Kiev, Ukraine
| | - Volodymyr Kvak
- Faculty of Plant Protection, Biotechnology and Ecology, National University of Life and Environmental Sciences, Kiev, Ukraine
- Institute of Energy Crops and Sugar Beets, National Academy of Agrarian Science, Kiev, Ukraine
| | - Hana Malinská
- Faculty of Science, Jan Evangelista Purkyně University in Ústí nad Labem, Ústí nad Labem, Czech Republic
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Hernychová L, Rosůlek M, Kádek A, Mareška V, Chmelík J, Adámková L, Grobárová V, Šebesta O, Kukačka Z, Skála K, Spiwok V, Černý J, Novák P. The C-type lectin-like receptor Nkrp1b: Structural proteomics reveals features affecting protein conformation and interactions. J Proteomics 2019; 196:162-172. [DOI: 10.1016/j.jprot.2018.11.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2018] [Revised: 10/31/2018] [Accepted: 11/05/2018] [Indexed: 11/24/2022]
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Vašků JAR, Vašků J, Černý J, Dostál M, Doležel S, Vašků A, Guba P, Urbánek P, Petržilka J, Šotolová O, Bednařík B, Nečas J. Therapy of Venous Hypertension in Calves with Total Artificial Heart (TAH). Int J Artif Organs 2018. [DOI: 10.1177/039139888901200407] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Vasomotor disregulation, preponderantly expressed by a pathological increase of central venous pressure (CVP) in calves with total artificial heart (TAH), starts to be evident from about the 50th day of pumping. The main cause of this state is an imbalance in cardiac receptor areas. Ventricular vasodepressor mechanisms are eliminated with the ventricular tissue, which is replaced by the artificial blood pump. In the stumps of both atria, which remain in situ, all neural elements disappear immediately after TAH implantation, but within two months they are fully regenerated. Regenerated atrial receptors are the starting points of afferent neural stimuli, which in the vasomotor center of the brainstem, increase the activity of the vasoconstricting functional component. A general tendency to vasoconstriction, now not well counterbalanced, increases, and the progressive venous hypertension causes loss of liver function and morphology. Two therapeutic approaches were tried: afferent therapy by atrial electrical stimulation, and efferent therapy by the administration of antihypertensives. Both kinds of this therapy were sufficiently effective in reducing CVP, protecting the liver, and prolonging average survival.
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Affiliation(s)
- JAR. Vašků
- Institute of Pathophysiology, Faculty of Medicine, J.E. Purkyně University and Research Centre “Artificial heart” of the Regional Institute of National Health (RINH), Brno - ČSSR
| | - J. Vašků
- Institute of Pathophysiology, Faculty of Medicine, J.E. Purkyně University and Research Centre “Artificial heart” of the Regional Institute of National Health (RINH), Brno - ČSSR
| | - J. Černý
- Institute of Pathophysiology, Faculty of Medicine, J.E. Purkyně University and Research Centre “Artificial heart” of the Regional Institute of National Health (RINH), Brno - ČSSR
| | - M. Dostál
- Institute of Pathophysiology, Faculty of Medicine, J.E. Purkyně University and Research Centre “Artificial heart” of the Regional Institute of National Health (RINH), Brno - ČSSR
| | - S. Doležel
- Institute of Pathophysiology, Faculty of Medicine, J.E. Purkyně University and Research Centre “Artificial heart” of the Regional Institute of National Health (RINH), Brno - ČSSR
| | - A. Vašků
- Institute of Pathophysiology, Faculty of Medicine, J.E. Purkyně University and Research Centre “Artificial heart” of the Regional Institute of National Health (RINH), Brno - ČSSR
| | - P. Guba
- Institute of Pathophysiology, Faculty of Medicine, J.E. Purkyně University and Research Centre “Artificial heart” of the Regional Institute of National Health (RINH), Brno - ČSSR
| | - P. Urbánek
- Institute of Pathophysiology, Faculty of Medicine, J.E. Purkyně University and Research Centre “Artificial heart” of the Regional Institute of National Health (RINH), Brno - ČSSR
| | - J. Petržilka
- Institute of Pathophysiology, Faculty of Medicine, J.E. Purkyně University and Research Centre “Artificial heart” of the Regional Institute of National Health (RINH), Brno - ČSSR
| | - O. Šotolová
- Institute of Pathophysiology, Faculty of Medicine, J.E. Purkyně University and Research Centre “Artificial heart” of the Regional Institute of National Health (RINH), Brno - ČSSR
| | - B. Bednařík
- Institute of Pathophysiology, Faculty of Medicine, J.E. Purkyně University and Research Centre “Artificial heart” of the Regional Institute of National Health (RINH), Brno - ČSSR
| | - J. Nečas
- Institute of Pathophysiology, Faculty of Medicine, J.E. Purkyně University and Research Centre “Artificial heart” of the Regional Institute of National Health (RINH), Brno - ČSSR
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Trbušek V, Fiala V, Vrbová M, Urbánek P, Vašků J, Urbánek E, Pavlíček V, Šotolová O, Dostál M, Sládek T, Černý J, Guba P. The Heart Prosthesis - Biocompatibility with Living Tissue. Int J Artif Organs 2018. [DOI: 10.1177/039139888400700312] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- V. Trbušek
- Regional Institute of National Health and Institute of Pathological Physiology Medical Faculty UJEP, Brno, ČSSR
| | - V. Fiala
- Regional Institute of National Health and Institute of Pathological Physiology Medical Faculty UJEP, Brno, ČSSR
| | - M. Vrbová
- Regional Institute of National Health and Institute of Pathological Physiology Medical Faculty UJEP, Brno, ČSSR
| | - P. Urbánek
- Regional Institute of National Health and Institute of Pathological Physiology Medical Faculty UJEP, Brno, ČSSR
| | - Jar Vašků
- Regional Institute of National Health and Institute of Pathological Physiology Medical Faculty UJEP, Brno, ČSSR
| | - E. Urbánek
- Regional Institute of National Health and Institute of Pathological Physiology Medical Faculty UJEP, Brno, ČSSR
| | - V. Pavlíček
- Regional Institute of National Health and Institute of Pathological Physiology Medical Faculty UJEP, Brno, ČSSR
| | - O. Šotolová
- Regional Institute of National Health and Institute of Pathological Physiology Medical Faculty UJEP, Brno, ČSSR
| | - M. Dostál
- Regional Institute of National Health and Institute of Pathological Physiology Medical Faculty UJEP, Brno, ČSSR
| | - T. Sládek
- Regional Institute of National Health and Institute of Pathological Physiology Medical Faculty UJEP, Brno, ČSSR
| | - J. Černý
- Regional Institute of National Health and Institute of Pathological Physiology Medical Faculty UJEP, Brno, ČSSR
| | - P. Guba
- Regional Institute of National Health and Institute of Pathological Physiology Medical Faculty UJEP, Brno, ČSSR
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Dostál M, Vašků J, Černý J, Šotolová O, Guba P, Vašků J, Urbánek P, Pavlíček V, Vašků A, Nečas J, Sládek T, Trbušek V, Bednařík B. Hematological and Biochemical Studies in Calves Living over 100 Days with the Polymethylmethacrylate Total Artificial Heart TNS Brno II. Int J Artif Organs 2018. [DOI: 10.1177/039139888600900110] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- M. Dostál
- Institute of Pathological Physiology Medical Faculty, Research Centre of the RINH (KúNZ) and 2nd Surgical Clinic, Faculty of Medicine Brno, Czechoslovakia
| | - J. Vašků
- Institute of Pathological Physiology Medical Faculty, Research Centre of the RINH (KúNZ) and 2nd Surgical Clinic, Faculty of Medicine Brno, Czechoslovakia
| | - J. Černý
- Institute of Pathological Physiology Medical Faculty, Research Centre of the RINH (KúNZ) and 2nd Surgical Clinic, Faculty of Medicine Brno, Czechoslovakia
| | - O. Šotolová
- Institute of Pathological Physiology Medical Faculty, Research Centre of the RINH (KúNZ) and 2nd Surgical Clinic, Faculty of Medicine Brno, Czechoslovakia
| | - P. Guba
- Institute of Pathological Physiology Medical Faculty, Research Centre of the RINH (KúNZ) and 2nd Surgical Clinic, Faculty of Medicine Brno, Czechoslovakia
| | - Jan Vašků
- Institute of Pathological Physiology Medical Faculty, Research Centre of the RINH (KúNZ) and 2nd Surgical Clinic, Faculty of Medicine Brno, Czechoslovakia
| | - P. Urbánek
- Institute of Pathological Physiology Medical Faculty, Research Centre of the RINH (KúNZ) and 2nd Surgical Clinic, Faculty of Medicine Brno, Czechoslovakia
| | - V. Pavlíček
- Institute of Pathological Physiology Medical Faculty, Research Centre of the RINH (KúNZ) and 2nd Surgical Clinic, Faculty of Medicine Brno, Czechoslovakia
| | - A. Vašků
- Institute of Pathological Physiology Medical Faculty, Research Centre of the RINH (KúNZ) and 2nd Surgical Clinic, Faculty of Medicine Brno, Czechoslovakia
| | - J. Nečas
- Institute of Pathological Physiology Medical Faculty, Research Centre of the RINH (KúNZ) and 2nd Surgical Clinic, Faculty of Medicine Brno, Czechoslovakia
| | - T. Sládek
- Institute of Pathological Physiology Medical Faculty, Research Centre of the RINH (KúNZ) and 2nd Surgical Clinic, Faculty of Medicine Brno, Czechoslovakia
| | - V. Trbušek
- Institute of Pathological Physiology Medical Faculty, Research Centre of the RINH (KúNZ) and 2nd Surgical Clinic, Faculty of Medicine Brno, Czechoslovakia
| | - B. Bednařík
- Institute of Pathological Physiology Medical Faculty, Research Centre of the RINH (KúNZ) and 2nd Surgical Clinic, Faculty of Medicine Brno, Czechoslovakia
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Pazourek L, Tomáš T, Mahdal M, Janíček P, Černý J, Ondrůšek Š. [Use of Solid Intercalary Allografts for Reconstruction Following the Resection of Primary Bone Tumors]. Acta Chir Orthop Traumatol Cech 2018; 85:171-178. [PMID: 30257775] [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: 06/08/2023]
Abstract
PURPOSE OF THE STUDY There are several treatment options for bone tumors at diaphyseal/metadiaphyseal sites of long bones (with joint preservation) including massive intercalary allografts, autografts (vascularized or non-vascularized fibular autograft, devitalised tumor bearing bone), endoprosthetic replacement (intercalary spacer), cementoplasty with ostheosynthesis and distraction osteogenesis. Reconstruction using massive intercalary bone allografts is for us the method of choice in case of curable primary bone tumors at the diaphyseal/metadiaphyseal region. The purpose of this study is to evaluate our results and complications. MATERIAL AND METHODS Our retrospective study reviewed 41 patients after intercalary allograft reconstruction following the resection of primary bone tumors in the years 2000 - 2014. The group consists of 27 men and 14 women with the mean age at the time of diagnosis 27 years and the mean follow-up (from primary surgery) was 7 years. The patients were diagnosed with the Ewing sarcoma (14), chondrosarcoma (9), osteosarcoma (8), adamantinoma (6), OFD-like adamantinoma (2) and aneurysmatic bone cyst (2). The site of tumor were tibia (18), femur (16), humerus (5), radius (1) and ulna (1). We retrospectively evaluated the results of this intercallary allograft reconstructions, the incidence of failures and complications as well as the role of risk factors. RESULTS 14 patients (34.1%) successfully healed without complications. In the same number of patients (14 patients, 34.1%) the allograft reconstruction failed. 7 of these patients underwent amputation (17.1%), 6 of whom for oncological complications (local recurrence) and only 1 for complications of the reconstruction (infection). Other 7 patients with an allograft-related failure were successfully treated with a limb salvage procedure and underwent a new reconstruction. The remaining 13 patients (31.7%) suffered from complications that did not result in a failure of the reconstruction. The major complications of the reconstruction were the non-union (53.7%), fractures and allograft resorption (14.6%) and infection (7.3%). By statistical evaluation of common risk factors a statistically significant relationship was found between uncomplicated healing and stable bridging osteosynthesis (p = 0.014), between allograft fractures/resorptions and non-bridging osteosynthesis (p = 0.018), and the lowest reoperation rate was connected with plate osteosynthesis (0.037). DISCUSSION AND CONCLUSIONS The intercalary allograft reconstruction is an important biological method in orthopaedic tumor surgery. Even though it is connected with a high rate of complications (non-union, fracture and resorption, infection), in the vast majority of cases they can be solved, while achieving limb-salvage and good function of extremity. The essential prerequisite for successful uncomplicated healing of reconstruction is the stable bridging osteosynthesis, preferably with a plate. In high risk patients with a combination of recognized important risk factors described in literature (adult patients, large resection (more than 15 cm), femoral location and aggressive oncological treatment) we nowadays try to reduce the complication rate with a primary combination of an allograft with vascularized fibular autograft. Key words:biological bone reconstruction, massive intercallary allograft, stable bridging osteosynthesis, primary bone tumors.
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Affiliation(s)
- L Pazourek
- I. ortopedická klinika Fakultní nemocnice U sv. Anny v Brně, Lékařská fakulta Masarykovy univerzity Brno
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Vališ K, Grobárová V, Hernychová L, Bugáňová M, Kavan D, Kalous M, Černý J, Stodůlková E, Kuzma M, Flieger M, Černý J, Novák P. Reprogramming of leukemic cell metabolism through the naphthoquinonic compound Quambalarine B. Oncotarget 2017; 8:103137-103153. [PMID: 29262552 PMCID: PMC5732718 DOI: 10.18632/oncotarget.21663] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [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: 07/14/2017] [Accepted: 09/21/2017] [Indexed: 12/31/2022] Open
Abstract
Abnormalities in cancer metabolism represent potential targets for cancer therapy. We have recently identified a natural compound Quambalarine B (QB), which inhibits proliferation of several leukemic cell lines followed by cell death. We have predicted ubiquinone binding sites of mitochondrial respiratory complexes as potential molecular targets of QB in leukemia cells. Hence, we tracked the effect of QB on leukemia metabolism by applying several omics and biochemical techniques. We have confirmed the inhibition of respiratory complexes by QB and found an increase in the intracellular AMP levels together with respiratory substrates. Inhibition of mitochondrial respiration by QB triggered reprogramming of leukemic cell metabolism involving disproportions in glycolytic flux, inhibition of proteins O-glycosylation, stimulation of glycine synthesis pathway, and pyruvate kinase activity, followed by an increase in pyruvate and a decrease in lactate levels. Inhibition of mitochondrial complex I by QB suppressed folate metabolism as determined by a decrease in formate production. We have also observed an increase in cellular levels of several amino acids except for aspartate, indicating the dependence of Jurkat (T-ALL) cells on aspartate synthesis. These results indicate blockade of mitochondrial complex I and II activity by QB and reduction in aspartate and folate metabolism as therapeutic targets in T-ALL cells. Anti-cancer activity of QB was also confirmed during in vivo studies, suggesting the therapeutic potential of this natural compound.
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Affiliation(s)
- Karel Vališ
- BIOCEV, Institute of Microbiology, v.v.i., The Czech Academy of Sciences, Vestec, Czech Republic.,Department of Biochemistry, Faculty of Science, Charles University, Prague, Czech Republic
| | - Valéria Grobárová
- Department of Cell Biology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Lucie Hernychová
- BIOCEV, Institute of Microbiology, v.v.i., The Czech Academy of Sciences, Vestec, Czech Republic.,Department of Cell Biology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Martina Bugáňová
- Institute of Microbiology, v.v.i., The Czech Academy of Sciences, Prague, Czech Republic.,Faculty of Chemical Technology, University of Chemistry and Technology, Prague, Czech Republic
| | - Daniel Kavan
- Department of Biochemistry, Faculty of Science, Charles University, Prague, Czech Republic.,Institute of Microbiology, v.v.i., The Czech Academy of Sciences, Prague, Czech Republic
| | - Martin Kalous
- Department of Cell Biology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Jiří Černý
- BIOCEV, Institute of Biotechnology, v.v.i., The Czech Academy of Sciences, Vestec, Czech Republic
| | - Eva Stodůlková
- Institute of Microbiology, v.v.i., The Czech Academy of Sciences, Prague, Czech Republic
| | - Marek Kuzma
- Institute of Microbiology, v.v.i., The Czech Academy of Sciences, Prague, Czech Republic
| | - Miroslav Flieger
- Institute of Microbiology, v.v.i., The Czech Academy of Sciences, Prague, Czech Republic
| | - Jan Černý
- Department of Cell Biology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Petr Novák
- BIOCEV, Institute of Microbiology, v.v.i., The Czech Academy of Sciences, Vestec, Czech Republic.,Department of Biochemistry, Faculty of Science, Charles University, Prague, Czech Republic
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Ničovský J, Ondrášek J, Černý J, Žáková D, Němec P. [Surgical treatment of aortic root aneurysm: comparison of Bentall procedure and David reimplantation of aortic valve]. Vnitr Lek 2017; 63:640-645. [PMID: 29127746] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
INTRODUCTION The aortic root aneurysm is associated with a more frequent occurrence of aortic dissection and development of aortic regurgitation. The aim of this study was to compare outcomes of composite graft replacement and valve sparing root replacement in treating aortic root aneurysms. METHODS From January 2006 to December 2015 a total of 137 patients (mean age 46.3 ± 14.5, range 16-65) underwent elective surgery for aortic root aneurysm without valvular structural defects. Replacement by mechanical composite graft (Bentall procedure) has been performed in 46 patients while 91 patients underwent valve sparing root replacement (David procedure). The mean length of follow-up has been 77 months. RESULTS There was no operative death. Overall 9 patients died during follow-up. Five patients were after Bentall procedure and 4 were after reimplantation of aortic valve. Thromboembolic and bleeding complications were observed in 7 patients, 5 of them were after Bentall surgery and 2 after reimplantation of the aortic valve. Five patients after reimplantation of aortic valve underwent reoperation. Four of these patients had aortic valve replacement and in 1 case aortic homograft was implanted. CONCLUSION Bentall procedure used to be the standard treatment for patients with aortic root aneurysms. During the past two decades, aortic valve sparing procedure has gained widespread use to reduce thromboembolic and bleeding complications.Key words: aortic root aneurysm - composite graft replacement - valve-sparing root replacement.
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Grobárová V, Vališ K, Talacko P, Pavlů B, Hernychová L, Nováková J, Stodůlková E, Flieger M, Novák P, Černý J. Quambalarine B, a Secondary Metabolite from Quambalaria cyanescens with Potential Anticancer Properties. J Nat Prod 2016; 79:2304-2314. [PMID: 27571379 DOI: 10.1021/acs.jnatprod.6b00362] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Quambalarine B (QB) is a secondary metabolite produced by the basidiomycete Quambalaria cyanescens with potential anticancer activity. Here we report that QB at low micromolar concentration inhibits proliferation of several model leukemic cell lines (Jurkat, NALM6, and REH), whereas higher concentrations induce cell death. By contrast, the effect of QB on primary leukocytes (peripheral blood mononuclear cells) is significantly milder with lower toxicity and cytostatic activity. Moreover, QB inhibited expression of the C-MYC oncoprotein and mRNA expression of its target genes, LDHA, PKM2, and GLS. Finally, QB blocked the phosphorylation of P70S6K, a downstream effector kinase in mTOR signaling that regulates translation of C-MYC. This observation could explain the molecular mechanism behind the antiproliferative and cytotoxic effects of QB on leukemic cells. Altogether, our results establish QB as a promising molecule in anticancer treatment.
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Affiliation(s)
- Valéria Grobárová
- Department of Cell Biology, Faculty of Science, Charles University , Viničná 7, 128 43 Prague 2, Czech Republic
| | - Karel Vališ
- Institute of Microbiology, v.v.i., The Czech Academy of Sciences , Vídeňská 1083, 142 20 Prague 4, Czech Republic
- Department of Biochemistry, Faculty of Science, Charles University , Hlavova 8, 128 43 Prague 2, Czech Republic
| | - Pavel Talacko
- Institute of Microbiology, v.v.i., The Czech Academy of Sciences , Vídeňská 1083, 142 20 Prague 4, Czech Republic
- Department of Biochemistry, Faculty of Science, Charles University , Hlavova 8, 128 43 Prague 2, Czech Republic
| | - Barbora Pavlů
- Department of Cell Biology, Faculty of Science, Charles University , Viničná 7, 128 43 Prague 2, Czech Republic
| | - Lucie Hernychová
- Department of Cell Biology, Faculty of Science, Charles University , Viničná 7, 128 43 Prague 2, Czech Republic
- Institute of Microbiology, v.v.i., The Czech Academy of Sciences , Vídeňská 1083, 142 20 Prague 4, Czech Republic
| | - Jana Nováková
- Institute of Microbiology, v.v.i., The Czech Academy of Sciences , Vídeňská 1083, 142 20 Prague 4, Czech Republic
| | - Eva Stodůlková
- Institute of Microbiology, v.v.i., The Czech Academy of Sciences , Vídeňská 1083, 142 20 Prague 4, Czech Republic
| | - Miroslav Flieger
- Institute of Microbiology, v.v.i., The Czech Academy of Sciences , Vídeňská 1083, 142 20 Prague 4, Czech Republic
| | - Petr Novák
- Institute of Microbiology, v.v.i., The Czech Academy of Sciences , Vídeňská 1083, 142 20 Prague 4, Czech Republic
- Department of Biochemistry, Faculty of Science, Charles University , Hlavova 8, 128 43 Prague 2, Czech Republic
| | - Jan Černý
- Department of Cell Biology, Faculty of Science, Charles University , Viničná 7, 128 43 Prague 2, Czech Republic
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22
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Kačenka M, Kaman O, Kikerlová S, Pavlů B, Jirák Z, Jirák D, Herynek V, Černý J, Chaput F, Laurent S, Lukeš I. Fluorescent magnetic nanoparticles for cell labeling: flux synthesis of manganite particles and novel functionalization of silica shell. J Colloid Interface Sci 2015; 447:97-106. [PMID: 25702866 DOI: 10.1016/j.jcis.2015.01.071] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [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: 12/21/2014] [Revised: 01/24/2015] [Accepted: 01/26/2015] [Indexed: 10/24/2022]
Abstract
Novel synthetic approaches for the development of multimodal imaging agents with high chemical stability are demonstrated. The magnetic cores are based on La0.63Sr0.37MnO3 manganite prepared as individual grains using a flux method followed by additional thermal treatment in a protective silica shell allowing to enhance their magnetic properties. The cores are then isolated and covered de novo with a hybrid silica layer formed through the hydrolysis and polycondensation of tetraethoxysilane and a fluorescent silane synthesized from rhodamine, piperazine spacer, and 3-iodopropyltrimethoxysilane. The aminoalkyltrialkoxysilanes are strictly avoided and the resulting particles are hydrolytically stable and do not release dye. The high colloidal stability of the material and the long durability of the fluorescence are reinforced by an additional silica layer on the surface of the particles. Structural and magnetic studies of the products using XRD, TEM, and SQUID magnetometry confirm the importance of the thermal treatment and demonstrate that no mechanical treatment is required for the flux-synthesized manganite. Detailed cell viability tests show negligible or very low toxicity at concentrations at which excellent labeling is achieved. Predominant localization of nanoparticles in lysosomes is confirmed by immunofluorescence staining. Relaxometric and biological studies suggest that the functionalized nanoparticles are suitable for imaging applications.
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Affiliation(s)
- Michal Kačenka
- Institute of Physics AS CR, Cukrovarnická 10, 162 00 Praha 6, Czech Republic; Department of Inorganic Chemistry, Faculty of Science, Charles University, Albertov 6, 128 43 Praha 2, Czech Republic
| | - Ondřej Kaman
- Institute of Physics AS CR, Cukrovarnická 10, 162 00 Praha 6, Czech Republic; Department of Cell Biology, Faculty of Science, Charles University, Albertov 6, 128 43 Praha 2, Czech Republic.
| | - Soňa Kikerlová
- Department of Cell Biology, Faculty of Science, Charles University, Albertov 6, 128 43 Praha 2, Czech Republic
| | - Barbora Pavlů
- Department of Cell Biology, Faculty of Science, Charles University, Albertov 6, 128 43 Praha 2, Czech Republic
| | - Zdeněk Jirák
- Institute of Physics AS CR, Cukrovarnická 10, 162 00 Praha 6, Czech Republic
| | - Daniel Jirák
- Institute of Clinical and Experimental Medicine, Vídeňská 1958, 140 21 Praha 4, Czech Republic; Institute of Biophysics and Informatics, 1st Faculty of Medicine, Charles University, Kateřinská 32, 121 08 Praha 2, Czech Republic
| | - Vít Herynek
- Institute of Clinical and Experimental Medicine, Vídeňská 1958, 140 21 Praha 4, Czech Republic
| | - Jan Černý
- Department of Cell Biology, Faculty of Science, Charles University, Albertov 6, 128 43 Praha 2, Czech Republic
| | - Frédéric Chaput
- Laboratoire de Chimie, UMR 5182 ENS-CNRS-UCBL, 46 allée d'Italie, 69364 Lyon cedex 07, France
| | - Sophie Laurent
- Department of General, Organic and Biomedicinal Chemistry, NMR and Molecular Imaging Lab, University of Mons, B-7000 Mons, Belgium
| | - Ivan Lukeš
- Department of Inorganic Chemistry, Faculty of Science, Charles University, Albertov 6, 128 43 Praha 2, Czech Republic
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Stodůlková E, Císařová I, Kolařík M, Chudíčková M, Novák P, Man P, Kuzma M, Pavlů B, Černý J, Flieger M. Biologically active metabolites produced by the basidiomycete Quambalaria cyanescens. PLoS One 2015; 10:e0118913. [PMID: 25723150 PMCID: PMC4344228 DOI: 10.1371/journal.pone.0118913] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Accepted: 01/15/2015] [Indexed: 11/18/2022] Open
Abstract
Four strains of the fungus Quambalaria cyanescens (Basidiomycota: Microstromatales), were used for the determination of secondary metabolites production and their antimicrobial and biological activities. A new naphthoquinone named quambalarine A, (S)-(+)-3-(5-ethyl-tetrahydrofuran-2-yliden)-5,7,8-trihydroxy-2-oxo-1,4-naphthoquinone (1), together with two known naphthoquinones, 3-hexanoyl-2,5,7,8-tetrahydroxy-1,4-naphthoquinone (named here as quambalarine B, 2) and mompain, 2,5,7,8-tetrahydroxy-1,4-naphthoquinone (3) were isolated. Their structures were determined by single-crystal X-ray diffraction crystallography, NMR and MS spectrometry. Quambalarine A (1) had a broad antifungal and antibacterial activity and is able inhibit growth of human pathogenic fungus Aspergillus fumigatus and fungi co-occurring with Q. cyanescens in bark beetle galleries including insect pathogenic species Beauveria bassiana. Quambalarine B (2) was active against several fungi and mompain mainly against bacteria. The biological activity against human-derived cell lines was selective towards mitochondria (2 and 3); after long-term incubation with 2, mitochondria were undetectable using a mitochondrial probe. A similar effect on mitochondria was observed also for environmental competitors of Q. cyanescens from the genus Geosmithia.
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Affiliation(s)
- Eva Stodůlková
- Institute of Microbiology of the ASCR, v.v.i., Prague, Czech Republic
| | - Ivana Císařová
- Department of Inorganic Chemistry, Faculty of Science, Charles University, Prague, Czech Republic
| | - Miroslav Kolařík
- Institute of Microbiology of the ASCR, v.v.i., Prague, Czech Republic
| | - Milada Chudíčková
- Institute of Microbiology of the ASCR, v.v.i., Prague, Czech Republic
| | - Petr Novák
- Institute of Microbiology of the ASCR, v.v.i., Prague, Czech Republic
| | - Petr Man
- Institute of Microbiology of the ASCR, v.v.i., Prague, Czech Republic
| | - Marek Kuzma
- Institute of Microbiology of the ASCR, v.v.i., Prague, Czech Republic
| | - Barbora Pavlů
- Department of Cell Biology, Faculty of Science, Charles University, Praha, Czech Republic
| | - Jan Černý
- Department of Cell Biology, Faculty of Science, Charles University, Praha, Czech Republic
| | - Miroslav Flieger
- Institute of Microbiology of the ASCR, v.v.i., Prague, Czech Republic
- * E-mail:
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Rozbeský D, Ivanova L, Hernychová L, Grobárová V, Novák P, Černý J. Nkrp1 family, from lectins to protein interacting molecules. Molecules 2015; 20:3463-78. [PMID: 25690298 PMCID: PMC6272133 DOI: 10.3390/molecules20023463] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2014] [Revised: 02/06/2015] [Accepted: 02/11/2015] [Indexed: 11/25/2022] Open
Abstract
The C-type lectin-like receptors include the Nkrp1 protein family that regulates the activity of natural killer (NK) cells. Rat Nkrp1a was reported to bind monosaccharide moieties in a Ca2+-dependent manner in preference order of GalNac > GlcNAc >> Fuc >> Gal > Man. These findings established for rat Nkrp1a have been extrapolated to all additional Nkrp1 receptors and have been supported by numerous studies over the past two decades. However, since 1996 there has been controversy and another article showed lack of interactions with saccharides in 1999. Nevertheless, several high affinity saccharide ligands were synthesized in order to utilize their potential in antitumor therapy. Subsequently, protein ligands were introduced as specific binders for Nkrp1 proteins and three dimensional models of receptor/protein ligand interaction were derived from crystallographic data. Finally, for at least some members of the NK cell C-type lectin-like proteins, the “sweet story” was impaired by two reports in recent years. It has been shown that the rat Nkrp1a and CD69 do not bind saccharide ligands such as GlcNAc, GalNAc, chitotetraose and saccharide derivatives (GlcNAc-PAMAM) do not directly and specifically influence cytotoxic activity of NK cells as it was previously described.
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MESH Headings
- Animals
- Antigens, CD/chemistry
- Antigens, CD/immunology
- Antigens, CD/metabolism
- Antigens, Differentiation, T-Lymphocyte/chemistry
- Antigens, Differentiation, T-Lymphocyte/immunology
- Antigens, Differentiation, T-Lymphocyte/metabolism
- Humans
- Killer Cells, Natural/chemistry
- Killer Cells, Natural/immunology
- Killer Cells, Natural/metabolism
- Lectins, C-Type/chemistry
- Lectins, C-Type/immunology
- Lectins, C-Type/metabolism
- Male
- NK Cell Lectin-Like Receptor Subfamily B/chemistry
- NK Cell Lectin-Like Receptor Subfamily B/immunology
- NK Cell Lectin-Like Receptor Subfamily B/metabolism
- Oligosaccharides/chemistry
- Oligosaccharides/immunology
- Oligosaccharides/metabolism
- Protein Structure, Tertiary
- Rats
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Affiliation(s)
- Daniel Rozbeský
- Institute of Microbiology, v.v.i., Academy of Sciences of the Czech Republic, Vídeňská 1083, Prague 414220, Czech Republic.
- Department of Biochemistry, Faculty of Science, Charles University, Hlavova 8, Prague 212843, Czech Republic.
| | - Ljubina Ivanova
- Institute of Microbiology, v.v.i., Academy of Sciences of the Czech Republic, Vídeňská 1083, Prague 414220, Czech Republic.
| | - Lucie Hernychová
- Institute of Microbiology, v.v.i., Academy of Sciences of the Czech Republic, Vídeňská 1083, Prague 414220, Czech Republic.
- Department of Cell Biology, Faculty of Science, Charles University, Viničná 7, Prague 212843, Czech Republic.
| | - Valéria Grobárová
- Department of Cell Biology, Faculty of Science, Charles University, Viničná 7, Prague 212843, Czech Republic.
| | - Petr Novák
- Institute of Microbiology, v.v.i., Academy of Sciences of the Czech Republic, Vídeňská 1083, Prague 414220, Czech Republic.
- Department of Biochemistry, Faculty of Science, Charles University, Hlavova 8, Prague 212843, Czech Republic.
| | - Jan Černý
- Department of Cell Biology, Faculty of Science, Charles University, Viničná 7, Prague 212843, Czech Republic.
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25
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Tomek P, Hrouzek P, Kuzma M, Sýkora J, Fišer R, Černý J, Novák P, Bártová S, Šimek P, Hof M, Kavan D, Kopecký J. Cytotoxic Lipopeptide Muscotoxin A, Isolated from Soil Cyanobacterium Desmonostoc muscorum, Permeabilizes Phospholipid Membranes by Reducing Their Fluidity. Chem Res Toxicol 2015; 28:216-24. [DOI: 10.1021/tx500382b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Petr Tomek
- Department
of Phototrophic Microorganisms−Algatech, Institute of Microbiology, Academy of Sciences of the Czech Republic, Opatovický mlýn, 379 81 Třeboň, Czech Republic
- Auckland
Cancer Society Research Centre, Faculty of Medical and Health Sciences, The University of Auckland, 85 Park Road, 1023 Auckland, New Zealand
| | - Pavel Hrouzek
- Department
of Phototrophic Microorganisms−Algatech, Institute of Microbiology, Academy of Sciences of the Czech Republic, Opatovický mlýn, 379 81 Třeboň, Czech Republic
- Faculty
of Science, Institute of Chemistry, University of South Bohemia, Branišovská
1760, 370 05 České
Budějovice, Czech Republic
| | - Marek Kuzma
- Laboratory
of Molecular Structure Characterization, Institute of Microbiology, Academy of Sciences of the Czech Republic, Vídeňská 1083, 142 20 Prague, Czech Republic
| | - Jan Sýkora
- Department
of Biophysical Chemistry, J. Heyrovský Institute of Physical
Chemistry, Academy of Sciences of the Czech Republic, Dolejškova
2155/3, 182 23 Prague
8, Czech Republic
| | - Radovan Fišer
- Department
of Genetics and Microbiology, Faculty of Sciences, Charles University, Viničná 5, 128 44 Prague 2, Czech Republic
| | - Jan Černý
- Department
of Cell Biology, Faculty of Sciences, Charles University, Viničná
7, 128 00 Prague
2, Czech Republic
| | - Petr Novák
- Laboratory
of Molecular Structure Characterization, Institute of Microbiology, Academy of Sciences of the Czech Republic, Vídeňská 1083, 142 20 Prague, Czech Republic
- Department
of Biochemistry, Faculty of Sciences, Charles University, Hlavova 8, 128 40 Prague, Czech Republic
| | - Simona Bártová
- Laboratory
of Molecular Structure Characterization, Institute of Microbiology, Academy of Sciences of the Czech Republic, Vídeňská 1083, 142 20 Prague, Czech Republic
- Department
of Analytical Chemistry, Institute of Chemical Technology, Technická
5, 166 28 Dejvice, Prague, Czech Republic
| | - Petr Šimek
- Institute
of Entomology, Biology Centre, Academy of Sciences of the Czech Republic, v.v.i., 370 05 České Budějovice, Czech Republic
| | - Martin Hof
- Department
of Biophysical Chemistry, J. Heyrovský Institute of Physical
Chemistry, Academy of Sciences of the Czech Republic, Dolejškova
2155/3, 182 23 Prague
8, Czech Republic
| | - Daniel Kavan
- Laboratory
of Molecular Structure Characterization, Institute of Microbiology, Academy of Sciences of the Czech Republic, Vídeňská 1083, 142 20 Prague, Czech Republic
| | - Jiří Kopecký
- Department
of Phototrophic Microorganisms−Algatech, Institute of Microbiology, Academy of Sciences of the Czech Republic, Opatovický mlýn, 379 81 Třeboň, Czech Republic
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26
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Nešpor D, Fila P, Černý J, Němec P. [Overview of primary sternal closure techniques]. Rozhl Chir 2015; 94:48-56. [PMID: 25659253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The aim of the overview study is to describe the currently used methods of primary median sternotomy closure in adult cardiac surgery. In the review of published literature, we draw on the data and focus on the methodology, indications, advantages, limitations, biomechanical and clinical results of the different methods in relation to the incidence of deep sternal wound complications after median sternotomy in adult cardiac surgery.Key words: sternum sternotomy adult cardiac surgery surgical procedures.
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Stodůlková E, Man P, Kuzma M, Černý J, Císařová I, Kubátová A, Chudíčková M, Kolařík M, Flieger M. A highly diverse spectrum of naphthoquinone derivatives produced by the endophytic fungus Biatriospora sp. CCF 4378. Folia Microbiol (Praha) 2014; 60:259-67. [DOI: 10.1007/s12223-014-0366-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2014] [Accepted: 11/14/2014] [Indexed: 11/29/2022]
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28
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Koukalová A, Pokorná Š, Fišer R, Kopecký V, Humpolíčková J, Černý J, Hof M. Membrane activity of the pentaene macrolide didehydroroflamycoin in model lipid bilayers. Biochim Biophys Acta 2014; 1848:444-52. [PMID: 25450349 DOI: 10.1016/j.bbamem.2014.10.038] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2014] [Revised: 10/21/2014] [Accepted: 10/27/2014] [Indexed: 10/24/2022]
Abstract
Didehydroroflamycoin (DDHR), a recently isolated member of the polyene macrolide family, was shown to have antibacterial and antifungal activity. However, its mechanism of action has not been investigated. Antibiotics from this family are amphiphilic; thus, they have membrane activity, their biological action is localized in the membrane, and the membrane composition and physical properties facilitate the recognition of a particular compound by the target organism. In this work, we use model lipid membranes comprised of giant unilamellar vesicles (GUVs) for a systematic study of the action of DDHR. In parallel, experiments are conducted using filipin III and amphotericin B, other members of the family, and the behavior observed for DDHR is described in the context of that of these two heavily studied compounds. The study shows that DDHR disrupts membranes via two different mechanisms and that the involvement of these mechanisms depends on the presence of cholesterol. The leakage assays performed in GUVs and the conductance measurements using black lipid membranes (BLM) reveal that the pores that develop in the absence of cholesterol are transient and their size is dependent on the DDHR concentration. In contrast, cholesterol promotes the formation of more defined structures that are temporally stable.
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Affiliation(s)
- Alena Koukalová
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 2155/3, 182 23 Prague 8, Czech Republic; Faculty of Science, Charles University in Prague, Albertov 6, 128 43 Prague 2, Czech Republic
| | - Šárka Pokorná
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 2155/3, 182 23 Prague 8, Czech Republic
| | - Radovan Fišer
- Faculty of Science, Charles University in Prague, Albertov 6, 128 43 Prague 2, Czech Republic; Institute of Microbiology, Academy of Sciences of the Czech Republic, v.v.i., Vídeňská 1083, 142 20 Praha 4-Krč, Czech Republic
| | - Vladimír Kopecký
- Institute of Physics, Faculty of Mathematics and Physics, Charles University in Prague, Ke Karlovu 5, 121 16 Prague 2, Czech Republic
| | - Jana Humpolíčková
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 2155/3, 182 23 Prague 8, Czech Republic.
| | - Jan Černý
- Faculty of Science, Charles University in Prague, Albertov 6, 128 43 Prague 2, Czech Republic
| | - Martin Hof
- J. Heyrovský Institute of Physical Chemistry, Academy of Sciences of the Czech Republic, v.v.i., Dolejškova 2155/3, 182 23 Prague 8, Czech Republic
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Brož J, Černý J, Doležal Z, Gurevich GM, Kubík P, Lukhanin AA, Lukhanin GA, Švejda J, Wilhelm I, Borisov NS, Kuzmin ES, Matafonov VN, Neganov AB, Pisarev IL, Plis YA, Usov YA. Measurement of spin-dependent total cross-section difference Δσ L in neutron-proton scattering at 16 MeV. ACTA ACUST UNITED AC 2014. [DOI: 10.1007/s002180050362] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [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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30
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31
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Hrouzek P, Kuzma M, Černý J, Novák P, Fišer R, Šimek P, Lukešová A, Kopecký J. The Cyanobacterial Cyclic Lipopeptides Puwainaphycins F/G Are Inducing Necrosis via Cell Membrane Permeabilization and Subsequent Unusual Actin Relocalization. Chem Res Toxicol 2012; 25:1203-11. [DOI: 10.1021/tx300044t] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Pavel Hrouzek
- Institute
of Microbiology, Department of Phototrophic Microorganisms−ALGATECH, Academy of Sciences of the Czech Republic, Opatovický
Mlýn, 379 81 Třeboň, Czech Republic
- Faculty of Sciences, University of South Bohemia, Branišovská
31, 370 05 České Budějovice, Czech Republic
| | - Marek Kuzma
- Institute of Microbiology, Academy of Sciences of the Czech Republic, Laboratory
of Molecular Structure Characterization, Vídeňská
1083, Prague, Czech Republic
| | - Jan Černý
- Department of Cell Biology, Faculty of Sciences, Charles University, Viničná 7, 12800 Praha 2
| | - Petr Novák
- Institute of Microbiology, Academy of Sciences of the Czech Republic, Laboratory
of Molecular Structure Characterization, Vídeňská
1083, Prague, Czech Republic
- Department of Biochemistry,
Faculty of Science, Charles University in Prague, Albertov 6, 128 43 Praha 2
| | - Radovan Fišer
- Department of Genetics and Microbiology, Faculty of Sciences, Charles University, Viničná 7, 12844
Praha 2
| | - Petr Šimek
- Institute of Entomology,
Biology Centre AS CR, v.v.i., 370 05 České Budějovice,
Czech Republic
| | - Alena Lukešová
- Institute
of Soil Biology, Biology Centre AS CR,
v.v.i., Na Sádkách 7, 370 05 České Budějovice,
Czech Republic
| | - Jiří Kopecký
- Institute
of Microbiology, Department of Phototrophic Microorganisms−ALGATECH, Academy of Sciences of the Czech Republic, Opatovický
Mlýn, 379 81 Třeboň, Czech Republic
- Faculty of Sciences, University of South Bohemia, Branišovská
31, 370 05 České Budějovice, Czech Republic
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Kačenka M, Kaman O, Kotek J, Falteisek L, Černý J, Jirák D, Herynek V, Zacharovová K, Berková Z, Jendelová P, Kupčík J, Pollert E, Veverka P, Lukeš I. Dual imaging probes for magnetic resonance imaging and fluorescence microscopy based on perovskite manganite nanoparticles. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm01258k] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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33
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Vaněrková M, Žaloudíková B, Němcová E, Juránková J, Pol J, Černý J, Němec P, Freiberger T. Detection of Cardiobacterium valvarum in a patient with aortic valve infective endocarditis by broad-range PCR. J Med Microbiol 2009; 59:231-234. [PMID: 19797468 DOI: 10.1099/jmm.0.012948-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Cardiobacterium valvarum, a fastidious Gram-negative bacterium, was detected in the aortic valve of a previously healthy 63-year-old man by broad-range PCR and 16S rRNA gene sequencing. In contrast to the patients in five previously published cases, our patient had neither a congenital bicuspid nor a prosthetic aortic valve. Here, we present a case of C. valvarum native tricuspid aortic valve infective endocarditis and a review of the literature.
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Affiliation(s)
- Martina Vaněrková
- Centre for Cardiovascular Surgery and Transplantation Brno, Brno, Czech Republic
| | - Barbora Žaloudíková
- Centre for Cardiovascular Surgery and Transplantation Brno, Brno, Czech Republic
| | - Eva Němcová
- Centre for Cardiovascular Surgery and Transplantation Brno, Brno, Czech Republic
| | - Jana Juránková
- Department of Clinical Microbiology, University Hospital Brno, Brno, Czech Republic
| | - Jiří Pol
- Centre for Cardiovascular Surgery and Transplantation Brno, Brno, Czech Republic
| | - Jan Černý
- Centre for Cardiovascular Surgery and Transplantation Brno, Brno, Czech Republic
| | - Petr Němec
- Centre for Cardiovascular Surgery and Transplantation Brno, Brno, Czech Republic
| | - Tomáš Freiberger
- Institute of Clinical Immunology and Allergology, Faculty of Medicine, Masaryk University, Brno, Czech Republic.,Centre for Cardiovascular Surgery and Transplantation Brno, Brno, Czech Republic
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Zierkiewicz W, Michalska D, Černý J, Hobza P. Cation–π complexes between alkali metal cation andpara-halogenophenols. Structures, binding energies and thermodynamic properties: DFT study and CCSD(T) complete basis set limit calculations. Mol Phys 2006. [DOI: 10.1080/00268970600652839] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Drbal K, Černý J, Hilgert I, Hor̆ejší V. A CD3 antibody distinguishes Vγ9Vδ2-T cells from other T cells. Immunol Lett 1997. [DOI: 10.1016/s0165-2478(97)86578-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Černý J, Fišerová A, Horváth O, Bezouška K, Pospíšil M, Hořejší V. Association of human NK cell surface receptors NKR-P1 and CD94 with Src-family protein kinases. Immunol Lett 1997. [DOI: 10.1016/s0165-2478(97)86399-7] [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: 11/28/2022]
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Pecka J, Černý J. Syntheses with anhydro sugars. XV. Syntheses of 1,6-anhydro-2,3,4-trideoxy-β-D-glycero-hexopyranose and its unsaturated derivatives as model substances for studying optical rotation of sugars. ACTA ACUST UNITED AC 1973. [DOI: 10.1135/cccc19730132] [Citation(s) in RCA: 23] [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: 11/05/2022]
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Sýkora V, Černý J, Herout V, Šorm F. On terpenes. LV. Synthesis of elemane (1-methyl-1-ethyl-2,4-diisopropylcyclohexane). ACTA ACUST UNITED AC 1954. [DOI: 10.1135/cccc19540566] [Citation(s) in RCA: 8] [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: 11/05/2022]
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