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Štepánková K, Chudíčková M, Šimková Z, Martinez-Varea N, Kubinová Š, Urdzíková LM, Jendelová P, Kwok JCF. Author Correction: Low oral dose of 4-methylumbelliferone reduces glial scar but is insufficient to induce functional recovery after spinal cord injury. Sci Rep 2024; 14:785. [PMID: 38191890 PMCID: PMC10774398 DOI: 10.1038/s41598-023-50043-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2024] Open
Affiliation(s)
- Kateřina Štepánková
- Institute of Experimental Medicine, Czech Academy of Sciences, Vídeňská, 1083, Prague, Czech Republic.
- Department of Neuroscience, Charles University, Second Faculty of Medicine, 15006, Prague, Czech Republic.
| | - Milada Chudíčková
- Institute of Experimental Medicine, Czech Academy of Sciences, Vídeňská, 1083, Prague, Czech Republic
| | - Zuzana Šimková
- Institute of Experimental Medicine, Czech Academy of Sciences, Vídeňská, 1083, Prague, Czech Republic
| | - Noelia Martinez-Varea
- Institute of Experimental Medicine, Czech Academy of Sciences, Vídeňská, 1083, Prague, Czech Republic
- Department of Neuroscience, Charles University, Second Faculty of Medicine, 15006, Prague, Czech Republic
| | - Šárka Kubinová
- Institute of Experimental Medicine, Czech Academy of Sciences, Vídeňská, 1083, Prague, Czech Republic
- Institute of Physics, Czech Academy of Sciences, 182 21, Prague, Czech Republic
| | - Lucia Machová Urdzíková
- Institute of Experimental Medicine, Czech Academy of Sciences, Vídeňská, 1083, Prague, Czech Republic.
- Department of Neuroscience, Charles University, Second Faculty of Medicine, 15006, Prague, Czech Republic.
| | - Pavla Jendelová
- Institute of Experimental Medicine, Czech Academy of Sciences, Vídeňská, 1083, Prague, Czech Republic.
- Department of Neuroscience, Charles University, Second Faculty of Medicine, 15006, Prague, Czech Republic.
| | - Jessica C F Kwok
- Institute of Experimental Medicine, Czech Academy of Sciences, Vídeňská, 1083, Prague, Czech Republic.
- Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, UK.
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Štepánková K, Chudíčková M, Šimková Z, Martinez-Varea N, Kubinová Š, Urdzíková LM, Jendelová P, Kwok JCF. Low oral dose of 4-methylumbelliferone reduces glial scar but is insufficient to induce functional recovery after spinal cord injury. Sci Rep 2023; 13:19183. [PMID: 37932336 PMCID: PMC10628150 DOI: 10.1038/s41598-023-46539-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2023] [Accepted: 11/02/2023] [Indexed: 11/08/2023] Open
Abstract
Spinal cord injury (SCI) induces the upregulation of chondroitin sulfate proteoglycans (CSPGs) at the glial scar and inhibits neuroregeneration. Under normal physiological condition, CSPGs interact with hyaluronan (HA) and other extracellular matrix on the neuronal surface forming a macromolecular structure called perineuronal nets (PNNs) which regulate neuroplasticity. 4-methylumbelliferone (4-MU) is a known inhibitor for HA synthesis but has not been tested in SCI. We first tested the effect of 4-MU in HA reduction in uninjured rats. After 8 weeks of 4-MU administration at a dose of 1.2 g/kg/day, we have not only observed a reduction of HA in the uninjured spinal cords but also a down-regulation of CS glycosaminoglycans (CS-GAGs). In order to assess the effect of 4-MU in chronic SCI, six weeks after Th8 spinal contusion injury, rats were fed with 4-MU or placebo for 8 weeks in combination with daily treadmill rehabilitation for 16 weeks to promote neuroplasticity. 4-MU treatment reduced the HA synthesis by astrocytes around the lesion site and increased sprouting of 5-hydroxytryptamine fibres into ventral horns. However, the current dose was not sufficient to suppress CS-GAG up-regulation induced by SCI. Further adjustment on the dosage will be required to benefit functional recovery after SCI.
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Affiliation(s)
- Kateřina Štepánková
- Institute of Experimental Medicine, Czech Academy of Sciences, Vídeňská, 1083, Prague, Czech Republic.
- Department of Neuroscience, Charles University, Second Faculty of Medicine, 15006, Prague, Czech Republic.
| | - Milada Chudíčková
- Institute of Experimental Medicine, Czech Academy of Sciences, Vídeňská, 1083, Prague, Czech Republic
| | - Zuzana Šimková
- Institute of Experimental Medicine, Czech Academy of Sciences, Vídeňská, 1083, Prague, Czech Republic
| | - Noelia Martinez-Varea
- Institute of Experimental Medicine, Czech Academy of Sciences, Vídeňská, 1083, Prague, Czech Republic
- Department of Neuroscience, Charles University, Second Faculty of Medicine, 15006, Prague, Czech Republic
| | - Šárka Kubinová
- Institute of Experimental Medicine, Czech Academy of Sciences, Vídeňská, 1083, Prague, Czech Republic
- Institute of Physics, Czech Academy of Sciences, 182 21, Prague, Czech Republic
| | - Lucia Machová Urdzíková
- Institute of Experimental Medicine, Czech Academy of Sciences, Vídeňská, 1083, Prague, Czech Republic.
- Department of Neuroscience, Charles University, Second Faculty of Medicine, 15006, Prague, Czech Republic.
| | - Pavla Jendelová
- Institute of Experimental Medicine, Czech Academy of Sciences, Vídeňská, 1083, Prague, Czech Republic.
- Department of Neuroscience, Charles University, Second Faculty of Medicine, 15006, Prague, Czech Republic.
| | - Jessica C F Kwok
- Institute of Experimental Medicine, Czech Academy of Sciences, Vídeňská, 1083, Prague, Czech Republic.
- Faculty of Biological Sciences, University of Leeds, Leeds, LS2 9JT, UK.
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Veselská T, Skelton J, Kostovčík M, Hulcr J, Baldrian P, Chudíčková M, Cajthaml T, Vojtová T, Garcia-Fraile P, Kolařík M. Adaptive traits of bark and ambrosia beetle-associated fungi. FUNGAL ECOL 2019. [DOI: 10.1016/j.funeco.2019.06.005] [Citation(s) in RCA: 6] [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: 10/26/2022]
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Jiráková K, Moskvin M, Machová Urdzíková L, Rössner P, Elzeinová F, Chudíčková M, Jirák D, Ziolkowska N, Horák D, Kubinová Š, Jendelová P. The negative effect of magnetic nanoparticles with ascorbic acid on peritoneal macrophages. Neurochem Res 2019; 45:159-170. [PMID: 30945145 DOI: 10.1007/s11064-019-02790-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Revised: 03/26/2019] [Accepted: 03/28/2019] [Indexed: 12/14/2022]
Abstract
Superparamagnetic iron oxide nanoparticles (SPIOn) are widely used as a contrast agent for cell labeling. Macrophages are the first line of defense of organisms in contact with nanoparticles after their administration. In this study we investigated the effect of silica-coated nanoparticles (γ-Fe2O3-SiO2) with or without modification by an ascorbic acid (γ-Fe2O3-SiO2-ASA), which is meant to act as an antioxidative agent on rat peritoneal macrophages. Both types of nanoparticles were phagocytosed by macrophages in large amounts as confirmed by transmission electron microscopy and Prusian blue staining, however they did not substantially affect the viability of exposed cells in monitored intervals. We further explored cytotoxic effects related to oxidative stress, which is frequently documented in cells exposed to nanoparticles. Our analysis of double strand breaks (DSBs) marker γH2AX showed an increased number of DSBs in cells treated with nanoparticles. Nanoparticle exposure further revealed only slight changes in the expression of genes involved in oxidative stress response. Lipid peroxidation, another marker of oxidative stress, was not significantly affirmed after nanoparticle exposure. Our data indicate that the effect of both types of nanoparticles on cell viability, or biomolecules such as DNA or lipids, was similar; however the presence of ascorbic acid, either bound to the nanoparticles or added to the cultivation medium, worsened the negative effect of nanoparticles in various tests performed. The attachment of ascorbic acid on the surface of nanoparticles did not have a protective effect against induced cytotoxicity, as expected.
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Affiliation(s)
- Klára Jiráková
- Department of Neuroregeneration, Institute of Experimental Medicine, Czech Academy of Sciences, Vídeňská 1083, 142 20, Prague 4, Czech Republic
| | - Maksym Moskvin
- Department of Polymer Particles, Institute of Macromolecular Chemistry, Czech Academy of Sciences, Prague, Czech Republic
| | - Lucia Machová Urdzíková
- Department of Neuroregeneration, Institute of Experimental Medicine, Czech Academy of Sciences, Vídeňská 1083, 142 20, Prague 4, Czech Republic
| | - Pavel Rössner
- Department of Genetic Toxicology and Nanotoxicology, Institute of Experimental Medicine, Czech Academy of Sciences, Prague, Czech Republic
| | - Fatima Elzeinová
- Department of Genetic Toxicology and Nanotoxicology, Institute of Experimental Medicine, Czech Academy of Sciences, Prague, Czech Republic
| | - Milada Chudíčková
- Department of Biomaterials and Biophysical Methods, Institute of Experimental Medicine, Czech Academy of Sciences, Prague, Czech Republic
| | - Daniel Jirák
- MR-Unit, Radiodiagnostic and Interventional Radiology Department, Institute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Natalia Ziolkowska
- MR-Unit, Radiodiagnostic and Interventional Radiology Department, Institute for Clinical and Experimental Medicine, Prague, Czech Republic
| | - Daniel Horák
- Department of Polymer Particles, Institute of Macromolecular Chemistry, Czech Academy of Sciences, Prague, Czech Republic
| | - Šárka Kubinová
- Department of Biomaterials and Biophysical Methods, Institute of Experimental Medicine, Czech Academy of Sciences, Prague, Czech Republic
| | - Pavla Jendelová
- Department of Neuroregeneration, Institute of Experimental Medicine, Czech Academy of Sciences, Vídeňská 1083, 142 20, Prague 4, Czech Republic. .,Department of Neuroscience, Second Faculty of Medicine, Charles University, Prague, Czech Republic.
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Píchová K, Pažoutová S, Kostovčík M, Chudíčková M, Stodůlková E, Novák P, Flieger M, van der Linde E, Kolařík M. Evolutionary history of ergot with a new infrageneric classification (Hypocreales: Clavicipitaceae: Claviceps). Mol Phylogenet Evol 2018; 123:73-87. [PMID: 29481949 DOI: 10.1016/j.ympev.2018.02.013] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [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: 06/01/2017] [Revised: 12/12/2017] [Accepted: 02/14/2018] [Indexed: 12/11/2022]
Abstract
The ergot, genus Claviceps, comprises approximately 60 species of specialised ovarial grass parasites famous for the production of food toxins and pharmaceutics. Although the ergot has been known for centuries, its evolution have not been resolved yet. Our approach combining multilocus phylogeny, molecular dating and the study of ecological, morphological and metabolic features shows that Claviceps originated in South America in the Palaeocene on a common ancestor of BEP (subfamilies Bambusoideae, Ehrhartoideae, Pooideae) and PACMAD (subfamilies Panicoideae, Aristidoideae, Chloridoideae, Micrairoideae, Arundinoideae, Danthonioideae) grasses. Four clades described here as sections diverged during the Paleocene and Eocene. Since Claviceps are parasitic fungi with a close relationship with their host plants, their evolution is influenced by interactions with the new hosts, either by the spread to a new continent or the radiation of the host plants. Three of the sections possess very narrow host ranges and biogeographical distributions and have relatively low toxicity. On the contrary, the section Claviceps, comprising the rye ergot, C. purpurea, is unique in all aspects. Fungi in this section of North American origin have spread all over the world and infect grasses in all subfamilies as well as sedges, and it is the only section synthesising toxic ergopeptines and secalonic acids. The evolutionary success of the Claviceps section members can be explained by high toxin presence, serving as feeding deterrents and playing a role in their protective mutualism with host plants. Closely related taxa Neoclaviceps monostipa and Cepsiclava phalaridis were combined into the genus Aciculosporium.
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Affiliation(s)
- Kamila Píchová
- Laboratory of Fungal Genetics and Metabolism, Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, CZ-14220 Prague, Czech Republic; Department of Botany, Faculty of Science, Charles University, Benátská 2, CZ-12801 Prague, Czech Republic
| | - Sylvie Pažoutová
- Laboratory of Fungal Genetics and Metabolism, Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, CZ-14220 Prague, Czech Republic
| | - Martin Kostovčík
- Laboratory of Fungal Genetics and Metabolism, Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, CZ-14220 Prague, Czech Republic
| | - Milada Chudíčková
- Laboratory of Fungal Genetics and Metabolism, Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, CZ-14220 Prague, Czech Republic
| | - Eva Stodůlková
- Laboratory of Fungal Genetics and Metabolism, Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, CZ-14220 Prague, Czech Republic
| | - Petr Novák
- Laboratory of Structural Biology and Cell Signalling, Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, CZ-14220 Prague, Czech Republic
| | - Miroslav Flieger
- Laboratory of Fungal Genetics and Metabolism, Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, CZ-14220 Prague, Czech Republic
| | - Elna van der Linde
- Biosystematics Division, Plant Protection Research Institute, Agricultural Research Council, Private Bag X134, Pretoria 0121, South Africa
| | - Miroslav Kolařík
- Laboratory of Fungal Genetics and Metabolism, Institute of Microbiology of the Czech Academy of Sciences, Vídeňská 1083, CZ-14220 Prague, Czech Republic.
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Hujslová M, Kubátová A, Bukovská P, Chudíčková M, Kolařík M. Extremely Acidic Soils are Dominated by Species-Poor and Highly Specific Fungal Communities. Microb Ecol 2017; 73:321-337. [PMID: 27687871 DOI: 10.1007/s00248-016-0860-3] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Accepted: 09/13/2016] [Indexed: 06/06/2023]
Abstract
Highly acidic soils (pH < 3) represent an environment which might potentially offer new biotechnologically interesting fungi. Nevertheless, only little data on fungal communities in highly acidic habitats are available. Here, we focused on the diversity of cultivable filamentous microfungi in highly acidic soils (pH < 3) in the Czech Republic. Altogether, 16 soil samples were collected from four sampling sites and were processed by various approaches. In total, 54 fungal taxa were isolated and identified using classical as well as molecular markers. All dominant species were found both as living mycelia and as resistant stages. Numerous recently described or unknown taxa were isolated. The core of the fungal assemblage under study consisted of phylogenetically unrelated and often globally distributed fungi exclusively inhabiting highly acidic habitats like Acidiella bohemica, Acidomyces acidophilus, and unidentified helotialean fungus, as well as taxa known from less acidic and often extreme environments like Acidea extrema, Penicillium simplicissimum s.l., and Penicillium spinulosum. The large number of identified specialized species indicates that highly acidic environments provide suitable conditions for the evolution of specialist species. The occurrence of ubiquitous fungi in highly acidic substrates points to the principal role of competition in the colonization of such environments. The detected taxa did not require low pH to survive, because they can grow in a broad range of pH.
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Affiliation(s)
- Martina Hujslová
- Department of Botany, Faculty of Science, Charles University in Prague, Benátská 2, 128 01, Prague 2, Czech Republic.
- Institute of Microbiology, Academy of Sciences of the Czech Republic, v.v.i., Vídeňská 1083, 142 20, Prague 4, Czech Republic.
| | - Alena Kubátová
- Department of Botany, Faculty of Science, Charles University in Prague, Benátská 2, 128 01, Prague 2, Czech Republic
| | - Petra Bukovská
- Institute of Microbiology, Academy of Sciences of the Czech Republic, v.v.i., Vídeňská 1083, 142 20, Prague 4, Czech Republic
| | - Milada Chudíčková
- Institute of Microbiology, Academy of Sciences of the Czech Republic, v.v.i., Vídeňská 1083, 142 20, Prague 4, Czech Republic
| | - Miroslav Kolařík
- Department of Botany, Faculty of Science, Charles University in Prague, Benátská 2, 128 01, Prague 2, Czech Republic
- Institute of Microbiology, Academy of Sciences of the Czech Republic, v.v.i., Vídeňská 1083, 142 20, Prague 4, Czech Republic
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Bílková B, Albrecht T, Chudíčková M, Holáň V, Piálek J, Vinkler M. Application of Concanavalin A during immune responsiveness skin-swelling tests facilitates measurement interpretation in mammalian ecology. Ecol Evol 2016; 6:4551-64. [PMID: 27386096 PMCID: PMC4931001 DOI: 10.1002/ece3.2211] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [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: 12/08/2015] [Revised: 04/20/2016] [Accepted: 05/05/2016] [Indexed: 12/02/2022] Open
Abstract
The skin‐swelling test is a simple and widespread method used in field ecological research to estimate cellular immune responsiveness in animals. This immunoecological test is based on measuring the magnitude of tissue swelling response at specific times following subcutaneous application of an experimental pro‐inflammatory stimulant. In the vast majority of studies across vertebrate taxa, phytohemagglutinin (PHA) is used as a universal stimulant. Given the complexity of immune response activation pathways of PHA, however, interpretation of test results can be ambiguous. Goal of this study was to improve methodology of the skin‐swelling test to decrease this ambiguity. Here, we present an alternative protocol aimed at facilitating interpretation of skin‐swelling data for mammals. Based on previous evidence suggesting that mammalian T cells are readily activated by Concanavalin A (ConA) in vitro, we compared cellular immune responses in vivo to PHA and ConA as an alternative pro‐inflammatory stimulant in mice. We measured magnitude of tissue swelling and compared it with intensity of blood cell infiltration into tissue over a 72‐hour interval. Our results corroborate that PHA and ConA show important differences in both dynamics and response amplitude in rodents. ConA induces stronger swelling with a distinct leukocyte activity pattern and higher pro‐inflammatory cytokine (interleukin 6 [IL‐6] and interferon gamma[IFN‐γ]) expression than PHA during peak response (24‐h post‐treatment). Furthermore, unlike PHA, magnitude of swelling was positively associated with cellular activity (number of neutrophils infiltrating tissue) following ConA injection. We conclude that ConA is the more suitable stimulant for skin‐swelling tests in mammals. This is because of the molecular binding specificity in the two lectins, that is, ConA specifically activates T cells while PHA also triggers erythroagglutination. We propose that ConA be used in all future ecological testing in mammals as it exhibits better performance and its application facilitates immunological interpretation of skin‐swelling test results.
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Affiliation(s)
- Barbora Bílková
- Department of Zoology Faculty of Science Charles University in Prague Viničná 7 128 44 Praha Czech Republic, EU
| | - Tomáš Albrecht
- Department of Zoology Faculty of Science Charles University in Prague Viničná 7128 44 Praha Czech Republic, EU; Research Facility Studenec Institute of Vertebrate Biology Czech Academy of Sciences Květná 8603 65 Brno Czech Republic, EU
| | - Milada Chudíčková
- Institute of Experimental Medicine Czech Academy of Sciences Vídeňská 1083 142 20 Praha 4 Czech Republic, EU
| | - Vladimír Holáň
- Institute of Experimental Medicine Czech Academy of Sciences Vídeňská 1083 142 20 Praha 4 Czech Republic, EU
| | - Jaroslav Piálek
- Research Facility Studenec Institute of Vertebrate Biology Czech Academy of Sciences Květná 8 603 65 Brno Czech Republic, EU
| | - Michal Vinkler
- Department of Zoology Faculty of Science Charles University in Prague Viničná 7 128 44 Praha Czech Republic, EU
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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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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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Pažoutová S, Pešicová K, Chudíčková M, Šrůtka P, Kolařík M. Delimitation of cryptic species inside Claviceps purpurea. Fungal Biol 2014; 119:7-26. [PMID: 25601146 DOI: 10.1016/j.funbio.2014.10.003] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [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: 06/09/2014] [Revised: 10/07/2014] [Accepted: 10/13/2014] [Indexed: 10/24/2022]
Abstract
Claviceps purpurea is an ovarian parasite infecting grasses (Poaceae) including cereals and forage plants. This fungus produces toxic alkaloids and consumption of contaminated grains can cause ergotism in humans and other mammals. Recent molecular genetics studies have indicated that it included three cryptic species (G1, G2, G3). In this study, reproductive isolation amongst these groups and among material from Phragmites and Molinia was tested using gene flow statistics for five polymorphic loci, and to support these data, phylogenetic affiliations based on gene trees and a multigene phylogeny were used. The four recognized species are characterized based on morphology and host spectrum and formal taxonomic names are proposed. Claviceps purpurea sensu stricto (G1 group) represents a typical rye ergot, but infects various other grasses. Typical hosts of Claviceps humidiphila (new name for G2 species), like Phalaris arundinacea, belong to grasses preferring humid locations. Claviceps spartinae (G3) is specific to chloridoid grasses from salt barches. The material from Phragmites and Molinia can be authenticated with the species Claviceps microcephala for which the new name Claviceps arundinis is proposed here. The divergence time between species was estimated and the tools for species identification are discussed.
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Affiliation(s)
- Sylvie Pažoutová
- Institute of Microbiology of the ASCR, v.v.i., Vídeňská 1083, 142 20 Prague 4, Czech Republic
| | - Kamila Pešicová
- Institute of Microbiology of the ASCR, v.v.i., Vídeňská 1083, 142 20 Prague 4, Czech Republic; Department of Botany, Faculty of Science, Charles University in Prague, Benátská 2, 128 01 Prague 2, Czech Republic
| | - Milada Chudíčková
- Institute of Microbiology of the ASCR, v.v.i., Vídeňská 1083, 142 20 Prague 4, Czech Republic
| | - Petr Šrůtka
- Faculty of Forestry and Wood Sciences, Czech University of Life Sciences, Kamýcká 129, 165 21 Prague 6, Czech Republic
| | - Miroslav Kolařík
- Institute of Microbiology of the ASCR, v.v.i., Vídeňská 1083, 142 20 Prague 4, Czech Republic.
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García-Fraile P, Chudíčková M, Benada O, Pikula J, Kolařík M. Serratia myotis sp. nov. and Serratia vespertilionis sp. nov., isolated from bats hibernating in caves. Int J Syst Evol Microbiol 2014; 65:90-94. [PMID: 25281728 DOI: 10.1099/ijs.0.066407-0] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
During the study of bacteria associated with bats affected by white-nose syndrome hibernating in caves in the Czech Republic, we isolated two facultatively anaerobic, Gram-stain-negative bacteria, designated strains 12(T) and 52(T). Strains 12(T) and 52(T) were motile, rod-like bacteria (0.5-0.6 µm in diameter; 1-1.3 µm long), with optimal growth at 20-35 °C and pH 6-8. On the basis of the almost complete sequence of their 16S rRNA genes they should be classified within the genus Serratia; the closest relatives to strains 12(T) and 52(T) were Serratia quinivorans DSM 4597(T) (99.5 % similarity in 16S rRNA gene sequences) and Serratia ficaria DSM 4569(T) (99.5% similarity in 16S rRNA gene sequences), respectively. DNA-DNA relatedness between strain 12(T) and S. quinivorans DSM 4597(T) was only 37.1% and between strain 52(T) and S. ficaria DSM 4569(T) was only 56.2%. Both values are far below the 70% threshold value for species delineation. In view of these data, we propose the inclusion of the two isolates in the genus Serratia as representatives of Serratia myotis sp. nov. (type strain 12(T) =CECT 8594(T) =DSM 28726(T)) and Serratia vespertilionis sp. nov. (type strain 52(T) =CECT 8595(T) =DSM 28727(T)).
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Affiliation(s)
- P García-Fraile
- Institute of Microbiology ASCR, Laboratory of Fungal Genetics and Metabolism, Videnska 1083, 142 20 Prague 4, Czech Republic
| | - M Chudíčková
- Institute of Microbiology ASCR, Laboratory of Fungal Genetics and Metabolism, Videnska 1083, 142 20 Prague 4, Czech Republic
| | - O Benada
- Laboratory of Molecular Structure Characterization, Institute of Microbiology Academy of Sciences of the Czech Republic, Videnska 1083, 142 20 Prague 4, Czech Republic
| | - J Pikula
- University of Veterinary and Pharmaceutical Sciences Brno, Department of Ecology and Diseases of Game, Fish and Bees, Palackeho 1 - 3, 612 42 Brno, Czech Republic
| | - M Kolařík
- Institute of Microbiology ASCR, Laboratory of Fungal Genetics and Metabolism, Videnska 1083, 142 20 Prague 4, Czech Republic
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12
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Kočí Z, Turnovcová K, Dubský M, Baranovičová L, Holáň V, Chudíčková M, Syková E, Kubinová S. Characterization of human adipose tissue-derived stromal cells isolated from diabetic patient's distal limbs with critical ischemia. Cell Biochem Funct 2014; 32:597-604. [PMID: 25251698 DOI: 10.1002/cbf.3056] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2014] [Revised: 07/30/2014] [Accepted: 07/31/2014] [Indexed: 12/16/2022]
Abstract
Adipose tissue is an abundant source of autologous adult stem cells that may bring new therapeutic perspectives on the treatment of diabetes and its complications. It is unclear whether adipose tissue-derived stromal cells (ASCs) of diabetic patients, constantly influenced by hyperglycaemia, have the same properties as non-diabetic controls. As an alternative source of ASCs, adipose tissue from distal limbs of diabetic patients with critical ischemia was isolated. ASCs were characterized in terms of cell surface markers, multilineage differentiation and the expression of vascular endothelial growth factor (VEGFA), chemokine-related genes and compared with non-diabetic controls. Flow cytometry analysis confirmed mesenchymal phenotypes in both diabetic and non-diabetic ASCs. Nevertheless, 40% of diabetic and 20% of non-diabetic ASC samples displayed high expressions of fibroblast marker, which inversely correlated with the expression of CD105. In diabetic patients, significantly decreased expression of VEGFA and chemokine receptor CXCR4 was found in fibroblast-positive ASCs, compared with their fibroblast-negative counterparts. Reduced osteogenic differentiation and the downregulation of chemokine CXCL12 were found in fibroblast-negative diabetic ASCs. Both diabetic and non-diabetic ASCs were differentiated into adipocytes and chondrocytes and did not reveal islet-like cell differentiation. According to this study, adipose tissue from distal limbs of diabetic patients is not satisfactory as an autologous ASC source. Hyperglycaemic milieu as well as other metabolic disorders linked to diabetes may have an influence on endogenous stem cell properties. The present study investigated the feasibility of autologous stem cell therapy in diabetic patients. ASCs isolated from the ischemic limb of diabetic patients were found to be less potent when compared phenotypically and functionally to control non-diabetic counterparts with no signs of limb ischemia. High expression of fibroblast markers associated with reduced expression of VEGFA as well as reduced osteogenic differentiation may have an impact on the effectiveness of autologous cell therapies in diabetic patients.
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Affiliation(s)
- Zuzana Kočí
- Department of Neuroscience, Institute of Experimental Medicine, Academy of Science, Prague, Czech Republic; Department of Neuroscience, 2nd Faculty of Medicine, Charles University, Prague, Czech Republic
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13
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Zajícová A, Javorková E, Trošan P, Chudíčková M, Krulová M, Holáň V. A low-molecular-weight dialysable leukocyte extract selectively enhances development of CD4⁺RORγt⁺ T cells and IL-17 production. Folia Biol (Praha) 2014; 60:253-260. [PMID: 25629265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A low-molecular-weight (under 10 kDa) dialysable leukocyte extract (called transfer factor, TF) has been shown to be a prospective substance to improve or modulate immune response in autoimmunity, inflammation, infectious diseases or cancers. However, the use of TF has been limited by the absence of any data on the mechanism of its action. Here we show that TF prepared from peripheral blood leukocytes of healthy human donors displays multiple regulatory effects on individual parameters of the immune system. TF decreases proliferation of T and B lymphocytes and partially alters the production of cytokines and nitric oxide by activated macrophages. TF also inhibits production of T helper 1 (Th1) cytokines interleukin 2 (IL-2) and interferon γ, slightly stimulates production of Th2 cytokine IL-10 and considerably enhances the secretion of IL-17 by activated mouse spleen T cells. At the molecular level, TF enhances expression of genes for transcription factor RORγt and for IL-17. The enhanced expression of the RORgt gene corresponds with an increase in the number of RORγt⁺CD4⁺ Th17 cells and with enhanced IL-17 production. In contrast, the expression of the Foxp3 gene and the proportion of CD4⁺CD25⁺Foxp3⁺ regulatory T cells are not significantly changed in the presence of TF. These results suggest that the activation of pro-inflammatory Th17 cells, which have multiple immunoregulatory properties, could be the main mechanism of the immunomodulatory action of a low-molecular-weight leukocyte extract.
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MESH Headings
- Adjuvants, Immunologic/pharmacology
- Animals
- B-Lymphocytes/drug effects
- CD4-Positive T-Lymphocytes/drug effects
- CD4-Positive T-Lymphocytes/metabolism
- Cell Division/drug effects
- Cells, Cultured
- Concanavalin A/pharmacology
- Drug Evaluation, Preclinical
- Forkhead Transcription Factors/biosynthesis
- Forkhead Transcription Factors/genetics
- Gene Expression Regulation/drug effects
- Interferon-gamma/biosynthesis
- Interferon-gamma/genetics
- Interleukin-17/biosynthesis
- Interleukin-17/genetics
- Interleukins/biosynthesis
- Interleukins/genetics
- Lymphocyte Activation/drug effects
- Lymphocyte Subsets/drug effects
- Lymphocyte Subsets/metabolism
- Macrophages, Peritoneal/drug effects
- Macrophages, Peritoneal/metabolism
- Mice
- Mice, Inbred BALB C
- Molecular Weight
- Nitric Oxide/biosynthesis
- Nuclear Receptor Subfamily 1, Group F, Member 3/analysis
- Nuclear Receptor Subfamily 1, Group F, Member 3/biosynthesis
- Nuclear Receptor Subfamily 1, Group F, Member 3/genetics
- Real-Time Polymerase Chain Reaction
- Spleen/cytology
- Transfer Factor/pharmacology
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Affiliation(s)
- A Zajícová
- Department of Transplantation Immunology, Institute of Experimental Medicine, AS CR, v. v. i., Prague, Czech Republic
| | - E Javorková
- Department of Transplantation Immunology, Institute of Experimental Medicine, AS CR, v. v. i., Prague, Czech Republic
| | - P Trošan
- Department of Transplantation Immunology, Institute of Experimental Medicine, AS CR, v. v. i., Prague, Czech Republic
| | - M Chudíčková
- Department of Transplantation Immunology, Institute of Experimental Medicine, AS CR, v. v. i., Prague, Czech Republic
| | - M Krulová
- Department of Transplantation Immunology, Institute of Experimental Medicine, AS CR, v. v. i., Prague, Czech Republic
| | - V Holáň
- Department of Transplantation Immunology, Institute of Experimental Medicine, AS CR, v. v. i., Prague, Czech Republic
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14
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Stodůlková E, Kuzma M, Hench IB, Cerný J, Králová J, Novák P, Chudíčková M, Savic M, Djokic L, Vasiljevic B, Flieger M. New polyene macrolide family produced by submerged culture of Streptomyces durmitorensis. J Antibiot (Tokyo) 2011; 64:717-22. [PMID: 21915134 DOI: 10.1038/ja.2011.81] [Citation(s) in RCA: 14] [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: 11/09/2022]
Abstract
A new polyene macrolide family, closely related to the pentaene macrolide antibiotic roflamycoin, was isolated from the both fermentation broth and biomass of Streptomyces durmitorensis wild-type strain MS405. The main compound was identified by NMR and Fourier transform ion cyclotron resonance mass spectrometry as 32,33-didehydroroflamycoin (1; DDHR). Additional four structurally related compounds were determined solely by MS analysis. DDHR induces cell death by apoptosis in various cancer cell lines as demonstrated by DNA fragmentation. Striking feature of DDHR is its internal fluorescence allowing visualization of labeled plasma membranes and internal membrane structures.
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Affiliation(s)
- Eva Stodůlková
- Institute of Microbiology, Academy of Sciences of the Czech Republic v.v.i., Prague, Czech Republic
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15
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16
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Pažoutová S, Šrůtka P, Holuša J, Chudíčková M, Kolařík M. Diversity of xylariaceous symbionts in Xiphydria woodwasps: role of vector and a host tree. FUNGAL ECOL 2010. [DOI: 10.1016/j.funeco.2010.07.002] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [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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17
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Hujslová M, Kubátová A, Chudíčková M, Kolařík M. Diversity of fungal communities in saline and acidic soils in the Soos National Natural Reserve, Czech Republic. Mycol Prog 2009. [DOI: 10.1007/s11557-009-0611-7] [Citation(s) in RCA: 35] [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: 11/24/2022]
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