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Libánská A, Randárová E, Rubanová D, Skoroplyas S, Bryja J, Kubala L, Konefal R, Navrátilová A, Cerezo LA, Šenolt L, Etrych T. Dexamethasone nanomedicines with optimized drug release kinetics tailored for treatment of site-specific rheumatic musculoskeletal diseases. Int J Pharm 2024; 654:123979. [PMID: 38458405 DOI: 10.1016/j.ijpharm.2024.123979] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Revised: 03/05/2024] [Accepted: 03/05/2024] [Indexed: 03/10/2024]
Abstract
The application of polymer-based drug delivery systems is advantageous for improved pharmacokinetics, controlled drug release, and decreased side effects of therapeutics for inflammatory disease. Herein, we describe the synthesis and characterization of linear N-(2-hydroxypropyl)methacrylamide-based polymer conjugates designed for controlled release of the anti-inflammatory drug dexamethasone through pH-sensitive bonds. The tailored release rates were achieved by modifying DEX with four oxo-acids introducing reactive oxo groups to the DEX derivatives. Refinement of reaction conditions yielded four well-defined polymer conjugates with varied release profiles which were more pronounced at the lower pH in cell lysosomes. In vitro evaluations in murine peritoneal macrophages, human synovial fibroblasts, and human peripheral blood mononuclear cells demonstrated that neither drug derivatization nor polymer conjugation affected cytotoxicity or anti-inflammatory properties. Subsequent in vivo tests using a murine arthritis model validated the superior anti-inflammatory efficacy of the prepared DEX-bearing conjugates with lower release rates. These nanomedicines showed much higher therapeutic activity compared to the faster release systems or DEX itself.
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Affiliation(s)
- Alena Libánská
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Prague, Czech Republic
| | - Eva Randárová
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Prague, Czech Republic
| | - Daniela Rubanová
- Institute of Biophysics of the Czech Academy of Sciences, Czech Republic; Department of Experimental Biology, Faculty of Science, Masaryk University, Czech Republic
| | | | - Josef Bryja
- Institute of Biophysics of the Czech Academy of Sciences, Czech Republic; Department of Experimental Biology, Faculty of Science, Masaryk University, Czech Republic
| | - Lukáš Kubala
- Institute of Biophysics of the Czech Academy of Sciences, Czech Republic; Department of Experimental Biology, Faculty of Science, Masaryk University, Czech Republic
| | - Rafał Konefal
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Prague, Czech Republic
| | - Adéla Navrátilová
- Institute of Rheumatology and Department of Rheumatology, 1st Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Lucie A Cerezo
- Institute of Rheumatology and Department of Rheumatology, 1st Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Ladislav Šenolt
- Institute of Rheumatology and Department of Rheumatology, 1st Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Tomáš Etrych
- Institute of Macromolecular Chemistry, Czech Academy of Sciences, Prague, Czech Republic.
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Rubanová D, Skoroplyas S, Libánská A, Randárová E, Bryja J, Chorvátová M, Etrych T, Kubala L. Therapeutic activity and biodistribution of a nano-sized polymer-dexamethasone conjugate intended for the targeted treatment of rheumatoid arthritis. Nanomedicine 2024; 55:102716. [PMID: 38738529 DOI: 10.1016/j.nano.2023.102716] [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: 03/21/2023] [Revised: 08/02/2023] [Accepted: 10/21/2023] [Indexed: 05/14/2024]
Abstract
Rheumatoid arthritis is a chronic inflammatory autoimmune disease caused by alteration of the immune system. Current therapies have several limitations and the use of nanomedicines represents a promising strategy to overcome them. By employing a mouse model of adjuvant induced arthritis, we aimed to evaluate the biodistribution and therapeutic effects of glucocorticoid dexamethasone conjugated to a nanocarrier based on biocompatible N-(2-hydroxypropyl) methacrylamide copolymers. We observed an increased accumulation of dexamethasone polymer nanomedicines in the arthritic mouse paw using non-invasive fluorescent in vivo imaging and confirmed it by the analysis of tissue homogenates. The dexamethasone conjugate exhibited a dose-dependent healing effect on arthritis and an improved therapeutic outcome compared to free dexamethasone. Particularly, significant reduction of accumulation of RA mediator RANKL was observed. Overall, our data suggest that the conjugation of dexamethasone to a polymer nanocarrier by means of stimuli-sensitive spacer is suitable strategy for improving rheumatoid arthritis therapy.
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Affiliation(s)
- Daniela Rubanová
- Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, 612 00 Brno, Czech Republic; Department of Experimental Biology, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Svitlana Skoroplyas
- Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, 612 00 Brno, Czech Republic; Department of Experimental Biology, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Alena Libánská
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Heyrovského nám. 2, 162 00 Prague, Czech Republic
| | - Eva Randárová
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Heyrovského nám. 2, 162 00 Prague, Czech Republic
| | - Josef Bryja
- Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, 612 00 Brno, Czech Republic; Department of Experimental Biology, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Michaela Chorvátová
- Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, 612 00 Brno, Czech Republic; Department of Experimental Biology, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic
| | - Tomáš Etrych
- Institute of Macromolecular Chemistry of the Czech Academy of Sciences, Heyrovského nám. 2, 162 00 Prague, Czech Republic
| | - Lukáš Kubala
- Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, 612 00 Brno, Czech Republic; International Clinical Research Center, St. Anne's University Hospital, Pekařská 53, 602 00 Brno, Czech Republic.
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3
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Daďová P, Mikulová A, Jaroušek R, Chorvátová M, Uldrijan S, Kubala L. A forskolin-mediated increase in cAMP promotes T helper cell differentiation into the Th1 and Th2 subsets rather than into the Th17 subset. Int Immunopharmacol 2023; 125:111166. [PMID: 37948861 DOI: 10.1016/j.intimp.2023.111166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 10/15/2023] [Accepted: 10/31/2023] [Indexed: 11/12/2023]
Abstract
The adenylyl cyclase (AC) signaling pathway is suggested to be a key regulator of immune system functions. However, specific effects of cyclic adenosine monophosphate (cAMP) on T helper (Th) cell differentiation and functions are unclear. The involvement of cAMP in the Th cell differentiation program, in particular the development of Th1, Th2, and Th17 subsets, was evaluated employing forskolin (FSK), a labdane diterpene well known as an AC activator. FSK mediated an elevation in Th1-specific markers reinforcing the Th1 cell phenotype. The Th2 differentiation was supported by FSK, though cell metabolism was negatively affected. In contrast, the Th17 immunophenotype was severely suppressed leading to the highly specific upregulation of CXCL13. The causality between FSK-elicited cAMP production and the observed reinforcement of Th2 differentiation was established by using AC inhibitor 2',5'-dideoxyadenosine, which reverted the FSK effects. Overall, an FSK-mediated cAMP increase affects Th1, Th2 and Th17 differentiation and can contribute to the identification of novel therapeutic targets for the treatment of Th cell-related pathological processes.
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Affiliation(s)
- Petra Daďová
- Institute of Biophysics of the Czech Academy of Sciences, 612 65 Brno, Czech Republic; Department of Experimental Biology, Faculty of Science, Masaryk University, Brno 625 00, Czech Republic
| | - Antónia Mikulová
- Institute of Biophysics of the Czech Academy of Sciences, 612 65 Brno, Czech Republic; Department of Experimental Biology, Faculty of Science, Masaryk University, Brno 625 00, Czech Republic
| | - Radim Jaroušek
- Institute of Biophysics of the Czech Academy of Sciences, 612 65 Brno, Czech Republic; Department of Experimental Biology, Faculty of Science, Masaryk University, Brno 625 00, Czech Republic
| | - Michaela Chorvátová
- Institute of Biophysics of the Czech Academy of Sciences, 612 65 Brno, Czech Republic; Department of Experimental Biology, Faculty of Science, Masaryk University, Brno 625 00, Czech Republic
| | - Stjepan Uldrijan
- Faculty of Medicine, Department of Biology, Masaryk University, Kamenice 5,625 00 Brno, Czech Republic; International Clinical Research Center, St. Anne's University Hospital, 656 91 Brno, Czech Republic
| | - Lukáš Kubala
- Institute of Biophysics of the Czech Academy of Sciences, 612 65 Brno, Czech Republic; International Clinical Research Center, St. Anne's University Hospital, 656 91 Brno, Czech Republic.
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Lehká K, Starigazdová J, Mrázek J, Nešporová K, Šimek M, Pavlík V, Chmelař J, Čepa M, Barrios-Llerena ME, Kocurková A, Kriváková E, Koukalová L, Kubala L, Velebný V. An in vitro model that mimics the foreign body response in the peritoneum: Study of the bioadhesive properties of HA-based materials. Carbohydr Polym 2023; 310:120701. [PMID: 36925239 DOI: 10.1016/j.carbpol.2023.120701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 02/03/2023] [Accepted: 02/12/2023] [Indexed: 02/19/2023]
Abstract
A cascade of reactions known as the foreign body response (FBR) follows the implantation of biomaterials leading to the formation of a fibrotic capsule around the implant and subsequent health complications. The severity of the FBR is driven mostly by the physicochemical characteristics of implanted material, the method and place of implantation, and the degree of immune system activation. Here we present an in vitro model for assessing new materials with respect to their potential to induce a FBR in the peritoneum. The model is based on evaluating protein sorption and cell adhesion on the implanted material. We tested our model on the free-standing films prepared from hyaluronan derivatives with different hydrophobicity, swelling ratio, and rate of solubilization. The proteomic analysis of films incubated in the mouse peritoneum showed that the presence of fibrinogen was driving the cell adhesion. Neither the film surface hydrophobicity/hydrophilicity nor the quantity of adsorbed proteins were decisive for the induction of the long-term cell adhesion leading to the FBR, while the dissolution rate of the material proved to be a crucial factor. Our model thus helps determine the probability of a FBR to materials implanted in the peritoneum while limiting the need for in vivo animal testing.
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Affiliation(s)
- Kateřina Lehká
- Contipro a.s., Dolní Dobrouč 401, 561 02 Dolní Dobrouč, Czech Republic
| | - Jana Starigazdová
- Contipro a.s., Dolní Dobrouč 401, 561 02 Dolní Dobrouč, Czech Republic
| | - Jiří Mrázek
- Contipro a.s., Dolní Dobrouč 401, 561 02 Dolní Dobrouč, Czech Republic; Department of Medical Biophysics and Medical Informatics, Third Faculty of Medicine, Charles University, Prague, Czech Republic
| | | | - Matěj Šimek
- Contipro a.s., Dolní Dobrouč 401, 561 02 Dolní Dobrouč, Czech Republic
| | - Vojtěch Pavlík
- Contipro a.s., Dolní Dobrouč 401, 561 02 Dolní Dobrouč, Czech Republic
| | - Josef Chmelař
- Contipro a.s., Dolní Dobrouč 401, 561 02 Dolní Dobrouč, Czech Republic
| | - Martin Čepa
- Contipro a.s., Dolní Dobrouč 401, 561 02 Dolní Dobrouč, Czech Republic
| | | | - Anna Kocurková
- Institute of Experimental Biology, Faculty of Science, Masaryk University, Kotlářská 267/2, 611 37 Brno, Czech Republic; Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, 612 65 Brno, Czech Republic; International Clinical Research Center, St. Anne's University Hospital, Pekařská 53, 656 91 Brno, Czech Republic
| | - Eva Kriváková
- Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, 612 65 Brno, Czech Republic
| | - Ludmila Koukalová
- Contipro a.s., Dolní Dobrouč 401, 561 02 Dolní Dobrouč, Czech Republic
| | - Lukáš Kubala
- Institute of Experimental Biology, Faculty of Science, Masaryk University, Kotlářská 267/2, 611 37 Brno, Czech Republic; Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, 612 65 Brno, Czech Republic; International Clinical Research Center, St. Anne's University Hospital, Pekařská 53, 656 91 Brno, Czech Republic
| | - Vladimír Velebný
- Contipro a.s., Dolní Dobrouč 401, 561 02 Dolní Dobrouč, Czech Republic
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5
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Černík M, Poláková K, Kubala L, Vítečková Wünschová A, Mac Gillavry Danylevska A, Pešková M, Víteček J. Luminal Surface Plasma Treatment of Closed Cylindrical Microchannels: A Tool toward the Creation of On-Chip Vascular Endothelium. ACS Biomater Sci Eng 2023; 9:2755-2763. [PMID: 37103011 PMCID: PMC10170472 DOI: 10.1021/acsbiomaterials.2c00887] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/28/2023]
Abstract
On-chip vascular microfluidic models provide a great tool to study aspects of cardiovascular diseases in vitro. To produce such models, polydimethylsiloxane (PDMS) has been the most widely used material. For biological applications, its hydrophobic surface has to be modified. The major approach has been plasma-based surface oxidation, which has been very challenging in the case of channels enclosed within a microfluidic chip. The preparation of the chip combined a 3D-printed mold with soft lithography and commonly available materials. We have introduced the high-frequency low-pressure air-plasma surface modification of seamless channels enclosed within a PDMS microfluidic chip. The plasma treatment modified the luminal surface more uniformly than in previous works. Such a setup enabled a higher degree of design freedom and a possibility of rapid prototyping. Further, plasma treatment in combination with collagen IV coating created a biomimetic surface for efficient adhesion of vascular endothelial cells as well as promoted long-term cell culture stability under flow. The cells within the channels were highly viable and showed physiological behavior, confirming the benefit of the presented surface modification.
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Affiliation(s)
- Marek Černík
- Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, 612 65 Brno, Czech Republic
- Department of Biochemistry, Faculty of Science, Masaryk University Brno, Kamenice 5, 625 00 Brno, Czech Republic
- International Clinical Research Center, St. Anne's University Hospital Brno, Pekařská 53, 656 91 Brno, Czech Republic
| | - Kamila Poláková
- Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, 612 65 Brno, Czech Republic
| | - Lukáš Kubala
- Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, 612 65 Brno, Czech Republic
- International Clinical Research Center, St. Anne's University Hospital Brno, Pekařská 53, 656 91 Brno, Czech Republic
| | - Andrea Vítečková Wünschová
- Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, 612 65 Brno, Czech Republic
- Department of Anatomy, Faculty of Medicine, Masaryk University Brno, Kamenice 5, 625 00 Brno, Czech Republic
| | - Anna Mac Gillavry Danylevska
- International Clinical Research Center, St. Anne's University Hospital Brno, Pekařská 53, 656 91 Brno, Czech Republic
- Department of Histology and Embryology, Faculty of Medicine, Masaryk University Brno, Kamenice 5, 625 00 Brno, Czech Republic
| | - Michaela Pešková
- Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, 612 65 Brno, Czech Republic
- Department of Biochemistry, Faculty of Science, Masaryk University Brno, Kamenice 5, 625 00 Brno, Czech Republic
| | - Jan Víteček
- Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, 612 65 Brno, Czech Republic
- International Clinical Research Center, St. Anne's University Hospital Brno, Pekařská 53, 656 91 Brno, Czech Republic
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6
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Šimek M, Turková K, Schwarzer M, Nešporová K, Kubala L, Hermannová M, Foglová T, Šafránková B, Šindelář M, Šrůtková D, Chatzigeorgiou S, Novotná T, Hudcovic T, Velebný V. Molecular weight and gut microbiota determine the bioavailability of orally administered hyaluronic acid. Carbohydr Polym 2023; 313:120880. [PMID: 37182970 DOI: 10.1016/j.carbpol.2023.120880] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2023] [Revised: 03/09/2023] [Accepted: 03/30/2023] [Indexed: 04/03/2023]
Abstract
The ability of hyaluronan as a dietary supplement to increase skin moisture and relieve knee pain has been demonstrated in several clinical studies. To understand the mechanism of action, determining hyaluronan's bioavailability and in vivo fate is crucial. Here, we used 13C-hyaluronan combined with LC-MS analysis to compare the absorption and metabolism of oral hyaluronan in germ-free and conventional wild-type mice. The presence of Bacteroides spp. in the gut was crucial for hyaluronan absorption. Specific microorganisms cleave hyaluronan into unsaturated oligosaccharides (<3 kDa) which are partially absorbed through the intestinal wall. The remaining hyaluronan fragments are metabolized into short-chain fatty acids, which are only metabolites available to the host. The poor bioavailability (~0.2 %) of oral hyaluronan indicates that the mechanism of action is the result of the systematic regulatory function of hyaluronan or its metabolites rather than the direct effects of hyaluronan at distal sites of action (skin, joints).
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Szczepanik PM, Mikhaylov AA, Hylse O, Kučera R, Daďová P, Nečas M, Kubala L, Paruch K, Švenda J. Convergent Assembly of the Tricyclic Labdane Core Enables Synthesis of Diverse Forskolin-like Molecules. Angew Chem Int Ed Engl 2023; 62:e202213183. [PMID: 36321750 DOI: 10.1002/anie.202213183] [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: 09/06/2022] [Indexed: 11/06/2022]
Abstract
We report a new synthetic strategy for the flexible preparation of forskolin-like molecules. The approach is different from the previously published works and employs a convergent assembly of the tricyclic labdane-type core from pre-functionalized cyclic building blocks. Stereoselective Michael addition enabled the fragment coupling with excellent control over three newly created contiguous stereocenters, all-carbon quaternary centers included. Silyl enol ether-promoted ring-opening metathesis paired with ring closure were the other key steps enabling concise assembly of the tricyclic core. Late-stage functionalization sequences transformed the tricyclic intermediates into a set of different forskolin-like molecules. The modular nature of the synthetic scheme described herein has the potential to become a general platform for the preparation of analogs of forskolin and other complex tricyclic labdanes.
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Affiliation(s)
- Paweł M Szczepanik
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic.,International Clinical Research Center, St. Anne's University Hospital, Pekařská 53, Brno, 656 91, Czech Republic
| | - Andrey A Mikhaylov
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic.,International Clinical Research Center, St. Anne's University Hospital, Pekařská 53, Brno, 656 91, Czech Republic
| | - Ondřej Hylse
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic.,International Clinical Research Center, St. Anne's University Hospital, Pekařská 53, Brno, 656 91, Czech Republic
| | - Roman Kučera
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic
| | - Petra Daďová
- Institute of Biophysics, Academy of Sciences of the Czech Republic, Královopolská 135, Brno, 612 65, Czech Republic.,Department of Experimental Biology, Faculty of Science, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic
| | - Marek Nečas
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic
| | - Lukáš Kubala
- International Clinical Research Center, St. Anne's University Hospital, Pekařská 53, Brno, 656 91, Czech Republic.,Institute of Biophysics, Academy of Sciences of the Czech Republic, Královopolská 135, Brno, 612 65, Czech Republic.,Department of Experimental Biology, Faculty of Science, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic
| | - Kamil Paruch
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic.,International Clinical Research Center, St. Anne's University Hospital, Pekařská 53, Brno, 656 91, Czech Republic
| | - Jakub Švenda
- Department of Chemistry, Faculty of Science, Masaryk University, Kamenice 5, Brno, 625 00, Czech Republic.,International Clinical Research Center, St. Anne's University Hospital, Pekařská 53, Brno, 656 91, Czech Republic
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Brtková B, Hermannová M, Chmelař J, Nešporová K, Kocurková A, Kubala L, Ambrožová G, Velebný V, Šimek M. Intraperitoneally administered native and lauroyl-modified hyaluronan films: Pharmacokinetic and metabolism studies. Carbohydr Polym 2023; 299:120201. [PMID: 36876812 DOI: 10.1016/j.carbpol.2022.120201] [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: 07/15/2022] [Revised: 09/16/2022] [Accepted: 10/05/2022] [Indexed: 11/09/2022]
Abstract
Hyaluronan is being investigated extensively as a biocompatible and biodegradable material for use in biomedical applications. While the derivatization of hyaluronan broadens its potential therapeutic use, the pharmacokinetics and metabolization of the derivatives must be thoroughly investigated. The fate of intraperitoneally-applied native and lauroyl-modified hyaluronan films with varying degrees of substitution was investigated in-vivo employing an exclusive stable isotope-labelling approach and LC-MS analysis. The materials were gradually degraded in peritoneal fluid, lymphatically absorbed, preferentially metabolized in the liver and eliminated without any observable accumulation in the body. Hyaluronan acylation prolongs its presence in the peritoneal cavity depending on the degree of substitution. The safety of acylated hyaluronan derivatives was confirmed via a metabolic study that revealed its degradation into non-toxic metabolites, i.e. native hyaluronan and free fatty acid. Stable isotope-labelling with LC-MS tracking comprises a high-quality procedure for the investigation of the metabolism and biodegradability of hyaluronan-based medical products in-vivo.
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Affiliation(s)
- Barbora Brtková
- Contipro a.s., Dolní Dobrouč 401, 56102 Dolní Dobrouč, Czech Republic; Department of Analytical Chemistry, Faculty of Science, Palacký University, Olomouc, Czech Republic
| | | | - Josef Chmelař
- Contipro a.s., Dolní Dobrouč 401, 56102 Dolní Dobrouč, Czech Republic
| | | | - Anna Kocurková
- International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czech Republic; Institute of Biophysics of the Czech Academy of Sciences, Brno, Czech Republic; Institute of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Lukáš Kubala
- International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czech Republic; Institute of Biophysics of the Czech Academy of Sciences, Brno, Czech Republic; Institute of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Gabriela Ambrožová
- Institute of Biophysics of the Czech Academy of Sciences, Brno, Czech Republic
| | - Vladimír Velebný
- Contipro a.s., Dolní Dobrouč 401, 56102 Dolní Dobrouč, Czech Republic
| | - Matěj Šimek
- Contipro a.s., Dolní Dobrouč 401, 56102 Dolní Dobrouč, Czech Republic.
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Szczepanik PM, Mikhaylov AA, Hylse O, Kučera R, Daďová P, Nečas M, Kubala L, Paruch K, Švenda J. Convergent Assembly of the Tricyclic Labdane Core Enables Synthesis of Diverse Forskolin‐like Molecules. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202213183] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Paweł M. Szczepanik
- Masaryk University: Masarykova Univerzita Department of Chemistry CZECH REPUBLIC
| | - Andrey A. Mikhaylov
- Masaryk University: Masarykova Univerzita Department of Chemistry CZECH REPUBLIC
| | - Ondřej Hylse
- Masaryk University: Masarykova Univerzita Departments of Chemistry CZECH REPUBLIC
| | - Roman Kučera
- Masaryk University: Masarykova Univerzita Department of Chemistry CZECH REPUBLIC
| | - Petra Daďová
- Czech Academy of Sciences: Akademie ved Ceske republiky Institute of Biophysics CZECH REPUBLIC
| | - Marek Nečas
- Masaryk University: Masarykova Univerzita Department of Chemistry CZECH REPUBLIC
| | - Lukáš Kubala
- Czech Academy of Sciences: Akademie ved Ceske republiky Institute of Biophysics CZECH REPUBLIC
| | - Kamil Paruch
- Masaryk University: Masarykova Univerzita Department of Chemistry CZECH REPUBLIC
| | - Jakub Švenda
- Masaryk University Department of Chemistry Kamenice 5 62500 Brno CZECH REPUBLIC
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10
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Jaroušek R, Mikulová A, Daďová P, Tauš P, Kurucová T, Plevová K, Tichý B, Kubala L. Single-cell RNA sequencing analysis of T helper cell differentiation and heterogeneity. Biochim Biophys Acta Mol Cell Res 2022; 1869:119321. [PMID: 35779629 DOI: 10.1016/j.bbamcr.2022.119321] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [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: 01/21/2022] [Revised: 06/02/2022] [Accepted: 06/22/2022] [Indexed: 06/15/2023]
Abstract
Single-cell transcriptomics has emerged as a powerful tool to investigate cells' biological landscape and focus on the expression profile of individual cells. Major advantage of this approach is an analysis of highly complex and heterogeneous cell populations, such as a specific subpopulation of T helper cells that are known to differentiate into distinct subpopulations. The need for distinguishing the specific expression profile is even more important considering the T cell plasticity. However, importantly, the universal pipelines for single-cell analysis are usually not sufficient for every cell type. Here, the aims are to analyze the diversity of T cell phenotypes employing classical in vitro cytokine-mediated differentiation of human T cells isolated from human peripheral blood by single-cell transcriptomic approach with support of labelled antibodies and a comprehensive bioinformatics analysis using combination of Seurat, Nebulosa, GGplot and others. The results showed high expression similarities between Th1 and Th17 phenotype and very distinct Th2 expression profile. In a case of Th2 highly specific marker genes SPINT2, TRIB3 and CST7 were expressed. Overall, our results demonstrate how donor difference, Th plasticity and cell cycle influence the expression profiles of distinct T cell populations. The results could help to better understand the importance of each step of the analysis when working with T cell single-cell data and observe the results in a more practical way by using our analyzed datasets.
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Affiliation(s)
- Radim Jaroušek
- Institute of Biophysics, Czech Academy of Sciences, Brno, Czech Republic; Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Antónia Mikulová
- Institute of Biophysics, Czech Academy of Sciences, Brno, Czech Republic; Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Petra Daďová
- Institute of Biophysics, Czech Academy of Sciences, Brno, Czech Republic; Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Petr Tauš
- Central European Institute of Technology, Masaryk University, Brno, Czech Republic
| | - Terézia Kurucová
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic; Central European Institute of Technology, Masaryk University, Brno, Czech Republic
| | - Karla Plevová
- Central European Institute of Technology, Masaryk University, Brno, Czech Republic; Institute of Medical Genetics and Genomics, University Hospital Brno and Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Boris Tichý
- Central European Institute of Technology, Masaryk University, Brno, Czech Republic
| | - Lukáš Kubala
- Institute of Biophysics, Czech Academy of Sciences, Brno, Czech Republic; Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic.
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11
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Kremserová S, Kocurková A, Chorvátová M, Klinke A, Kubala L. Myeloperoxidase Deficiency Alters the Process of the Regulated Cell Death of Polymorphonuclear Neutrophils. Front Immunol 2022; 13:707085. [PMID: 35211113 PMCID: PMC8860816 DOI: 10.3389/fimmu.2022.707085] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Accepted: 01/18/2022] [Indexed: 01/17/2023] Open
Abstract
Polymorphonuclear neutrophils (PMNs) play a key role in host defense. However, their massive accumulation at the site of inflammation can delay regenerative healing processes and can initiate pathological inflammatory processes. Thus, the efficient clearance of PMNs mediated by the induction of regulated cell death is a key process preventing the development of these pathological conditions. Myeloperoxidase (MPO), a highly abundant enzyme in PMN granules, primarily connected with PMN defense machinery, is suggested to play a role in PMN-regulated cell death. However, the contribution of MPO to the mechanisms of PMN cell death remains incompletely characterized. Herein, the process of the cell death of mouse PMNs induced by three different stimuli – phorbol 12-myristate 13-acetate (PMA), opsonized streptococcus (OST), and N-formyl-met-leu-phe (fMLP) – was investigated. MPO-deficient PMNs revealed a significantly decreased rate of cell death characterized by phosphatidylserine surface exposure and cell membrane permeabilization. An inhibitor of MPO activity, 4-aminobenzoic acid hydrazide, did not exhibit a significant effect on PMA-induced cell death compared to MPO deficiency. Interestingly, only the limited activation of markers related to apoptotic cell death was observed (e.g. caspase 8 activation, Bax expression) and they mostly did not correspond to phosphatidylserine surface exposure. Furthermore, a marker characterizing autophagy, cleavage of LC3 protein, as well as histone H3 citrullination and its surface expression was observed. Collectively, the data show the ability of MPO to modulate the life span of PMNs primarily through the potentiation of cell membrane permeabilization and phosphatidylserine surface exposure.
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Affiliation(s)
- Silvie Kremserová
- Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, Czechia
| | - Anna Kocurková
- Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, Czechia.,Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czechia.,International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czechia
| | - Michaela Chorvátová
- Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, Czechia.,Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czechia
| | - Anna Klinke
- Clinic of General and Interventional Cardiology/Angiology, Agnes Wittenborg Institute of Translational Cardiovascular Research, Herz- und Diabeteszentrum NRW, Ruhr-Universität Bochum, Bad Oeynhausen, Germany
| | - Lukáš Kubala
- Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, Czechia.,Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czechia.,International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czechia
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12
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Pavlík V, Machalová V, Čepa M, Šínová R, Šafránková B, Kulhánek J, Drmota T, Kubala L, Huerta-Ángeles G, Velebný V, Nešporová K. Retinoic Acid Grafted to Hyaluronic Acid Activates Retinoid Gene Expression and Removes Cholesterol from Cellular Membranes. Biomolecules 2022; 12:biom12020200. [PMID: 35204701 PMCID: PMC8961547 DOI: 10.3390/biom12020200] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 01/12/2022] [Accepted: 01/20/2022] [Indexed: 02/05/2023] Open
Abstract
All-trans-retinoic acid (atRA) is a potent ligand that regulates gene expression and is used to treat several skin disorders. Hyaluronic acid (HA) was previously conjugated with atRA (HA-atRA) to obtain a novel amphiphilic compound. HA-atRA forms micelles that incorporate hydrophobic molecules and facilitate their transport through the skin. The aim of this study was to determine the influence of HA-atRA on gene expression in skin cells and to compare it with that of unbound atRA. Gene expression was investigated using microarrays and a luciferase system with a canonical atRA promoter. HA-atRA upregulated gene expression similarly to atRA. However, HA-atRA activated the expression of cholesterol metabolism genes, unlike atRA. Further investigation using HPLC and filipin III staining suggested that the treated cells induced cholesterol synthesis to replenish the cholesterol removed from the cells by HA-atRA. HA modified with oleate (HA-C18:1) removed cholesterol from the cells similarly to HA-atRA, suggesting that the cholesterol removal stemmed from the amphiphilic nature of the two derivatives. HA-atRA induces retinoid signaling. Thus, HA-atRA could be used to treat skin diseases, such as acne and psoriasis, where the combined action of atRA signaling and anti-inflammatory cholesterol removal may be potentially beneficial.
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Affiliation(s)
- Vojtěch Pavlík
- R&D Department, Contipro, a.s., 562 04 Dolní Dobrouč, Czech Republic; (V.M.); (M.Č.); (R.Š.); (B.Š.); (J.K.); (T.D.); (G.H.-Á.); (V.V.); (K.N.)
- Third Faculty of Medicine, Charles University, 100 00 Prague, Czech Republic
- Correspondence:
| | - Veronika Machalová
- R&D Department, Contipro, a.s., 562 04 Dolní Dobrouč, Czech Republic; (V.M.); (M.Č.); (R.Š.); (B.Š.); (J.K.); (T.D.); (G.H.-Á.); (V.V.); (K.N.)
| | - Martin Čepa
- R&D Department, Contipro, a.s., 562 04 Dolní Dobrouč, Czech Republic; (V.M.); (M.Č.); (R.Š.); (B.Š.); (J.K.); (T.D.); (G.H.-Á.); (V.V.); (K.N.)
| | - Romana Šínová
- R&D Department, Contipro, a.s., 562 04 Dolní Dobrouč, Czech Republic; (V.M.); (M.Č.); (R.Š.); (B.Š.); (J.K.); (T.D.); (G.H.-Á.); (V.V.); (K.N.)
- Institute of Experimental Biology, Faculty of Science, Masaryk University, 625 00 Brno, Czech Republic;
| | - Barbora Šafránková
- R&D Department, Contipro, a.s., 562 04 Dolní Dobrouč, Czech Republic; (V.M.); (M.Č.); (R.Š.); (B.Š.); (J.K.); (T.D.); (G.H.-Á.); (V.V.); (K.N.)
| | - Jaromír Kulhánek
- R&D Department, Contipro, a.s., 562 04 Dolní Dobrouč, Czech Republic; (V.M.); (M.Č.); (R.Š.); (B.Š.); (J.K.); (T.D.); (G.H.-Á.); (V.V.); (K.N.)
| | - Tomáš Drmota
- R&D Department, Contipro, a.s., 562 04 Dolní Dobrouč, Czech Republic; (V.M.); (M.Č.); (R.Š.); (B.Š.); (J.K.); (T.D.); (G.H.-Á.); (V.V.); (K.N.)
| | - Lukáš Kubala
- Institute of Experimental Biology, Faculty of Science, Masaryk University, 625 00 Brno, Czech Republic;
- International Clinical Research Center, St. Anne’s University Hospital, 656 91 Brno, Czech Republic
| | - Gloria Huerta-Ángeles
- R&D Department, Contipro, a.s., 562 04 Dolní Dobrouč, Czech Republic; (V.M.); (M.Č.); (R.Š.); (B.Š.); (J.K.); (T.D.); (G.H.-Á.); (V.V.); (K.N.)
| | - Vladimír Velebný
- R&D Department, Contipro, a.s., 562 04 Dolní Dobrouč, Czech Republic; (V.M.); (M.Č.); (R.Š.); (B.Š.); (J.K.); (T.D.); (G.H.-Á.); (V.V.); (K.N.)
| | - Kristina Nešporová
- R&D Department, Contipro, a.s., 562 04 Dolní Dobrouč, Czech Republic; (V.M.); (M.Č.); (R.Š.); (B.Š.); (J.K.); (T.D.); (G.H.-Á.); (V.V.); (K.N.)
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13
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Šafaříková E, Ehlich J, Stříteský S, Vala M, Weiter M, Pacherník J, Kubala L, Víteček J. Conductive Polymer PEDOT:PSS-Based Platform for Embryonic Stem-Cell Differentiation. Int J Mol Sci 2022; 23:ijms23031107. [PMID: 35163031 PMCID: PMC8835127 DOI: 10.3390/ijms23031107] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [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: 12/21/2021] [Revised: 01/13/2022] [Accepted: 01/17/2022] [Indexed: 01/12/2023] Open
Abstract
Organic semiconductors are constantly gaining interest in regenerative medicine. Their tunable physico-chemical properties, including electrical conductivity, are very promising for the control of stem-cell differentiation. However, their use for combined material-based and electrical stimulation remains largely underexplored. Therefore, we carried out a study on whether a platform based on the conductive polymer poly(3,4-ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) can be beneficial to the differentiation of mouse embryonic stem cells (mESCs). The platform was prepared using the layout of a standard 24-well cell-culture plate. Polyethylene naphthalate foil served as the substrate for the preparation of interdigitated gold electrodes by physical vapor deposition. The PEDOT:PSS pattern was fabricated by precise screen printing over the gold electrodes. The PEDOT:PSS platform was able to produce higher electrical current with the pulsed-direct-current (DC) electrostimulation mode (1 Hz, 200 mV/mm, 100 ms pulse duration) compared to plain gold electrodes. There was a dominant capacitive component. In proof-of-concept experiments, mESCs were able to respond to such electrostimulation by membrane depolarization and elevation of cytosolic calcium. Further, the PEDOT:PSS platform was able to upregulate cardiomyogenesis and potentially inhibit early neurogenesis per se with minor contribution of electrostimulation. Hence, the present work highlights the large potential of PEDOT:PSS in regenerative medicine.
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Affiliation(s)
- Eva Šafaříková
- Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, 612 65 Brno, Czech Republic; (E.Š.); (L.K.)
- Department of Experimental Biology, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic;
| | - Jiří Ehlich
- Faculty of Chemistry, Brno University of Technology, Purkyňova 118, 612 00 Brno, Czech Republic; (J.E.); (S.S.); (M.V.); (M.W.)
| | - Stanislav Stříteský
- Faculty of Chemistry, Brno University of Technology, Purkyňova 118, 612 00 Brno, Czech Republic; (J.E.); (S.S.); (M.V.); (M.W.)
| | - Martin Vala
- Faculty of Chemistry, Brno University of Technology, Purkyňova 118, 612 00 Brno, Czech Republic; (J.E.); (S.S.); (M.V.); (M.W.)
| | - Martin Weiter
- Faculty of Chemistry, Brno University of Technology, Purkyňova 118, 612 00 Brno, Czech Republic; (J.E.); (S.S.); (M.V.); (M.W.)
| | - Jiří Pacherník
- Department of Experimental Biology, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic;
| | - Lukáš Kubala
- Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, 612 65 Brno, Czech Republic; (E.Š.); (L.K.)
- Department of Experimental Biology, Faculty of Science, Masaryk University, Kamenice 5, 625 00 Brno, Czech Republic;
- International Clinical Research Center, St. Anne’s University Hospital Brno, Pekařská 53, 656 91 Brno, Czech Republic
| | - Jan Víteček
- Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, 612 65 Brno, Czech Republic; (E.Š.); (L.K.)
- Correspondence: ; Tel./Fax: +420-541-517104; Fax: +420-541-517104
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14
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Mrázek J, Kohout J, Kmječ T, Nešporová K, Chmelař J, Kubala L, Velebný V. Insoluble hyaluronan films obtained by heterogeneous crosslinking with iron(III) as resorbable implants. Int J Biol Macromol 2021; 191:201-210. [PMID: 34543627 DOI: 10.1016/j.ijbiomac.2021.09.059] [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: 04/26/2021] [Revised: 09/08/2021] [Accepted: 09/09/2021] [Indexed: 10/20/2022]
Abstract
We present water-insoluble hyaluronan films crosslinked by trivalent iron developed as potential resorbable implants. The films were crosslinked by sorption of ferric salt into solid HA films in water/2-propanol bath. These heterogeneously crosslinked films (het-FeHA) remained tough and dimensionally stable when rehydrated in saline. In contrast, films prepared by drying the well-known homogeneous ferric hyaluronate gels (hom-FeHA) softened upon rehydration and expanded rapidly. Differences between hom-FeHA and het-FeHA result from polymer network topology (dominant inter- or intra-molecular crosslink, respectively). Moreover, Mössbauer spectroscopy of het-FeHA revealed diiron complexes, while iron in the hom-FeHA was present exclusively as γ-FeOOH nanoparticles or amorphous FeOOH. The biocompatibility tests of het-FeHA did not show any adverse effect and the sample disintegrated within one day when implanted in mice peritoneum. In conclusion, we developed implantable hyaluronan-based free-standing film with minimal swelling that can be resorbed quickly enough to avoid induction of foreign-body reaction.
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Affiliation(s)
- Jiří Mrázek
- Contipro a.s., Dolní Dobrouč 401, 56102 Dolní Dobrouč, Czechia; Department of Medical Biophysics and Medical Informatics, Third Faculty of Medicine, Charles University, Prague, Czechia.
| | - Jaroslav Kohout
- Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, 18000 Prague 8, Czechia
| | - Tomáš Kmječ
- Faculty of Mathematics and Physics, Charles University, V Holešovičkách 2, 18000 Prague 8, Czechia
| | | | - Josef Chmelař
- Contipro a.s., Dolní Dobrouč 401, 56102 Dolní Dobrouč, Czechia
| | - Lukáš Kubala
- Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, 612 65 Brno, Czechia; International Clinical Research Center, St. Anne's University Hospital, Pekařská 53, 656 91 Brno, Czechia
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15
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Mosejová E, Bosnjakovic R, Kubala L, Vašíček O. Pseurotin D Induces Apoptosis through Targeting Redox Sensitive Pathways in Human Lymphoid Leukemia Cells. Antioxidants (Basel) 2021; 10:antiox10101576. [PMID: 34679711 PMCID: PMC8533295 DOI: 10.3390/antiox10101576] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 09/23/2021] [Accepted: 10/01/2021] [Indexed: 01/23/2023] Open
Abstract
Chronic lymphocytic leukemia (CLL) is the most prevalent lymphoid malignancy in many geographical regions of the world. Pseurotin D, a secondary metabolite of fungi, represents a group of bioactive natural products with a newly ascribed range of interesting biological activities. The purpose of this study was to bring new insights into the mechanism behind the effects of pseurotin D on MEC-1 cells as a representative CLL cell line, with a particular focus on selected signaling pathways important in the proliferation of cells and targeting mitochondrial metabolism. Our results showed that pseurotin D was able to significantly inhibit the proliferation of MEC-1 cells and arrested them in the G2/M cell cycle phase. In addition, pseurotin D was able to induce apoptosis. We found that all of these effects were associated with a change in mitochondrial membrane potential and the production of mitochondrial reactive oxygen species (ROS). We showed for the first time that pseurotin D suppresses MEC-1 cell proliferation and induces apoptotic cell death via induction of the collapse of the mitochondria respiratory chain and the ROS-related caspase pathway. Our results show the pseurotins family as promising compounds which could serve as a basis for the development of new compounds in the treatment of lymphoma.
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Affiliation(s)
- Eva Mosejová
- Institute of Biophysics of the Czech Academy of Sciences, 612 65 Brno, Czech Republic; (E.M.); (R.B.); (L.K.)
| | - Rebeka Bosnjakovic
- Institute of Biophysics of the Czech Academy of Sciences, 612 65 Brno, Czech Republic; (E.M.); (R.B.); (L.K.)
| | - Lukáš Kubala
- Institute of Biophysics of the Czech Academy of Sciences, 612 65 Brno, Czech Republic; (E.M.); (R.B.); (L.K.)
- Institute of Experimental Biology, Faculty of Science, Masaryk University, 625 00 Brno, Czech Republic
- International Clinical Research Center, St. Anne’s University Hospital, 656 91 Brno, Czech Republic
| | - Ondřej Vašíček
- Institute of Biophysics of the Czech Academy of Sciences, 612 65 Brno, Czech Republic; (E.M.); (R.B.); (L.K.)
- Institute of Experimental Biology, Faculty of Science, Masaryk University, 625 00 Brno, Czech Republic
- Correspondence: ; Tel.: +420-541-517-207
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16
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Thalerová S, Pešková M, Kittová P, Gulati S, Víteček J, Kubala L, Mikulík R. Effect of Apixaban Pretreatment on Alteplase-Induced Thrombolysis: An In Vitro Study. Front Pharmacol 2021; 12:740930. [PMID: 34603054 PMCID: PMC8479181 DOI: 10.3389/fphar.2021.740930] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Accepted: 08/27/2021] [Indexed: 12/22/2022] Open
Abstract
Benefit of thrombolytic therapy in patients with acute stroke, who are on anticoagulant treatment, is not well addressed. The aim of this study was to investigate whether apixaban can modify the thrombolytic efficacy of alteplase in vitro. Static and flow models and two variants of red blood cell (RBC) dominant clots, with and without apixaban, were used. Clots were prepared from the blood of healthy human donors and subsequently exposed to alteplase treatment. Apixaban and alteplase were used in clinically relevant concentrations. Clot lysis in the static model was determined both by clot weight and spectrophotometric determination of RBC release. Clot lysis in the flow model was determined by measuring recanalization time, clot length and spectrophotometric determination of RBC release. In the static model, clots without apixaban; compared to those with apixaban had alteplase-induced mass loss 54 ± 8% vs. 53 ± 8%, p = 1.00; RBC release 0.14 ± 0.04 vs. 0.12 ± 0.04, p = 0.14, respectively. Very similar results were obtained if plasma was used instead of physiological buffered saline as the incubation medium. In the flow model, clot lysis without apixaban; compared to those with apixaban was as follows: recanalization time 107 ± 46 min vs. 127 ± 31 min, p = 1.00; recanalization frequency 90 ± 22% vs. 90 ± 22%, p = 1.00; clot volume reduction 32 ± 15% vs. 34 ± 10%, p = 1.00; RBC release 0.029 ± 0.007 vs. 0.022 ± 0.007, p = 0.16, respectively. Apixaban had no positive effect on alteplase-induced thrombolysis in both the in vitro static and flow models. Our data support current clinical practice, such that thrombolysis is contraindicated in stroke treatment for patients who have been treated with anticoagulants.
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Affiliation(s)
- Sandra Thalerová
- Neurology Department, International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czechia.,Institute of Biophysics of the Czech Academy of Sciences, Brno, Czechia.,Department of Biochemistry, Faculty of Science, Masaryk University, Brno, Czechia
| | - Michaela Pešková
- Institute of Biophysics of the Czech Academy of Sciences, Brno, Czechia
| | - Patrícia Kittová
- Institute of Biophysics of the Czech Academy of Sciences, Brno, Czechia
| | - Sumeet Gulati
- Neurology Department, International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czechia.,Institute of Biophysics of the Czech Academy of Sciences, Brno, Czechia
| | - Jan Víteček
- Institute of Biophysics of the Czech Academy of Sciences, Brno, Czechia.,Center of Biomolecular and Cell Engineering, International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czechia
| | - Lukáš Kubala
- Institute of Biophysics of the Czech Academy of Sciences, Brno, Czechia.,Center of Biomolecular and Cell Engineering, International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czechia
| | - Robert Mikulík
- Neurology Department, International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czechia
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17
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Šimek M, Nešporová K, Kocurková A, Foglová T, Ambrožová G, Velebný V, Kubala L, Hermannová M. How the molecular weight affects the in vivo fate of exogenous hyaluronan delivered intravenously: A stable-isotope labelling strategy. Carbohydr Polym 2021; 263:117927. [PMID: 33858586 DOI: 10.1016/j.carbpol.2021.117927] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Revised: 02/21/2021] [Accepted: 03/07/2021] [Indexed: 12/15/2022]
Abstract
There is inconsistent information regarding the size effects of exogenously given hyaluronan on its in vivo fate. The data are often biased by the poor quality of hyaluronan and non-ideal labelling strategies used for resolving exogenous/endogenous hyaluronan, which only monitor the label and not hyaluronan itself. To overcome these drawbacks and establish the pharmacokinetics of intravenous hyaluronan in relation to its Mw, 13C-labelled HA of five Mws from 13.6-1562 kDa was prepared and administered to mice at doses 25-50 mg kg-1. The elimination efficiency increased with decreasing Mw. Low Mw hyaluronan was rapidly eliminated as small hyaluronan fragments in urine, while high Mw hyaluronan exhibited saturable kinetics and complete metabolization within 48 h. All tested Mws exhibited a similar uptake by liver cells and metabolization into activated sugars. 13C-labelling combined with LC-MS provides an excellent approach to elucidating in vivo fate and biological activities of hyaluronan.
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Affiliation(s)
- Matěj Šimek
- Contipro a.s., Dolní Dobrouč 401, 56102, Dolní Dobrouč, Czech Republic; Department of Analytical Chemistry, Faculty of Science, Palacký University, Olomouc, Czech Republic
| | | | - Anna Kocurková
- International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czech Republic; Institute of Biophysics of the Czech Academy of Sciences, Brno, Czech Republic; Institute of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Tereza Foglová
- Contipro a.s., Dolní Dobrouč 401, 56102, Dolní Dobrouč, Czech Republic
| | - Gabriela Ambrožová
- International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czech Republic; Institute of Biophysics of the Czech Academy of Sciences, Brno, Czech Republic
| | - Vladimír Velebný
- Contipro a.s., Dolní Dobrouč 401, 56102, Dolní Dobrouč, Czech Republic
| | - Lukáš Kubala
- International Clinical Research Center, St. Anne's University Hospital Brno, Brno, Czech Republic; Institute of Biophysics of the Czech Academy of Sciences, Brno, Czech Republic; Institute of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic.
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18
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Kolářová H, Víteček J, Černá A, Černík M, Přibyl J, Skládal P, Potěšil D, Ihnatová I, Zdráhal Z, Hampl A, Klinke A, Kubala L. Myeloperoxidase mediated alteration of endothelial function is dependent on its cationic charge. Free Radic Biol Med 2021; 162:14-26. [PMID: 33271281 DOI: 10.1016/j.freeradbiomed.2020.11.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [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: 06/02/2020] [Revised: 11/02/2020] [Accepted: 11/10/2020] [Indexed: 12/20/2022]
Abstract
Endothelial cell (EC) glycocalyx (GLX) comprise a multicomponent layer of proteoglycans and glycoproteins. Alteration of its integrity contributes to chronic vascular inflammation and leads to the development of cardiovascular diseases. Myeloperoxidase (MPO), a highly abundant enzyme released by polymorphonuclear neutrophils, binds to the GLX and deleteriously affects vascular EC functions. The focus of this study was to elucidate the mechanisms of MPO-mediated alteration of GLX molecules, and to unravel subsequent changes in endothelial integrity and function. MPO binding to GLX of human ECs and subsequent internalization was mediated by cell surface heparan sulfate chains. Moreover, interaction of MPO, which is carrying a cationic charge, with anionic glycosaminoglycans (GAGs) resulted in reduction of their relative charge. By means of micro-viscometry and atomic force microscopy, we disclosed that MPO can crosslink GAG chains. MPO-dependent modulation of GLX structure was further supported by alteration of wheat germ agglutinin staining. Increased expression of ICAM-1 documented endothelial cell activation by both catalytically active and also inactive MPO. Furthermore, MPO increased vascular permeability connected with reorganization of intracellular junctions, however, this was dependent on MPO's catalytic activity. Novel proteins interacting with MPO during transcytosis were identified by proteomic analysis. Altogether, these findings provide evidence that MPO through interaction with GAGs modulates overall charge of the GLX, causing modification of its structure and thus affecting EC function. Importantly, our results also suggest a number of proteins interacting with MPO that possess a variety of cellular localizations and functions.
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Affiliation(s)
- Hana Kolářová
- Department of Biophysics of Immune System, Institute of Biophysics of the Czech Academy of Sciences, Kralovopolska 135, Brno, Czech Republic
| | - Jan Víteček
- Department of Biophysics of Immune System, Institute of Biophysics of the Czech Academy of Sciences, Kralovopolska 135, Brno, Czech Republic
| | - Anna Černá
- Department of Biophysics of Immune System, Institute of Biophysics of the Czech Academy of Sciences, Kralovopolska 135, Brno, Czech Republic
| | - Marek Černík
- Department of Biophysics of Immune System, Institute of Biophysics of the Czech Academy of Sciences, Kralovopolska 135, Brno, Czech Republic
| | - Jan Přibyl
- Central European Institute for Technology, Masaryk University, Kamenice 5, Brno, Czech Republic
| | - Petr Skládal
- Central European Institute for Technology, Masaryk University, Kamenice 5, Brno, Czech Republic
| | - David Potěšil
- National Centre for Biomolecular Research, Faculty of Science, Masaryk University, Kamenice 5, 62500, Brno, Czech Republic
| | - Ivana Ihnatová
- Institute of Biostatistics and Analyses, Masaryk University, Kamenice 3, Brno, Czech Republic
| | - Zbyněk Zdráhal
- Central European Institute for Technology, Masaryk University, Kamenice 5, Brno, Czech Republic; National Centre for Biomolecular Research, Faculty of Science, Masaryk University, Kamenice 5, 62500, Brno, Czech Republic
| | - Aleš Hampl
- Faculty of Medicine, Department of Histology and Embryology, Masaryk University, Kamenice 3, 625 00, Brno, Czech Republic
| | - Anna Klinke
- Clinic of General and Interventional Cardiology/Angiology, Agnes Wittenborg Institute of Translational Cardiovascular Research, Herz- und Diabeteszentrum NRW, Ruhr-Universität Bochum, Bad Oeynhausen, Germany
| | - Lukáš Kubala
- Department of Biophysics of Immune System, Institute of Biophysics of the Czech Academy of Sciences, Kralovopolska 135, Brno, Czech Republic.
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Radaszkiewicz KA, Beckerová D, Woloszczuková L, Radaszkiewicz TW, Lesáková P, Blanářová OV, Kubala L, Humpolíček P, Pachernik J. 12-O-Tetradecanoylphorbol-13-acetate increases cardiomyogenesis through PKC/ERK signaling. Sci Rep 2020; 10:15922. [PMID: 32985604 PMCID: PMC7522207 DOI: 10.1038/s41598-020-73074-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Accepted: 08/31/2020] [Indexed: 12/21/2022] Open
Abstract
12-O-Tetradecanoylphorbol-13-acetate (TPA) is the most widely used diacylglycerol (DAG) mimetic agent and inducer of protein kinase C (PKC)-mediated cellular response in biomedical studies. TPA has been proposed as a pluripotent cell differentiation factor, but results obtained have been inconsistent. In the present study we show that TPA can be applied as a cardiomyogenesis-promoting factor for the differentiation of mouse embryonic stem (mES) cells in vitro. The mechanism of TPA action is mediated by the induction of extracellular signal-regulated kinase (ERK) activity and the subsequent phosphorylation of GATA4 transcription factor. Interestingly, general mitogens (FGF, EGF, VEGF and serum) or canonical WNT signalling did not mimic the effect of TPA. Moreover, on the basis of our results, we postulate that a TPA-sensitive population of cardiac progenitor cells exists at a certain time point (after days 6–8 of the differentiation protocol) and that the proposed treatment can be used to increase the multiplication of ES cell-derived cardiomyocytes.
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Affiliation(s)
| | - Deborah Beckerová
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Lucie Woloszczuková
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | | | - Petra Lesáková
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Olga Vondálová Blanářová
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Lukáš Kubala
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic.,Department of Free Radical Pathophysiology, Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, Czech Republic
| | - Petr Humpolíček
- Centre of Polymer Systems and Faculty of Technology, Tomas Bata University in Zlin, 760 01, Zlin, Czech Republic
| | - Jiří Pachernik
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic.
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Číž M, Dvořáková A, Skočková V, Kubala L. The Role of Dietary Phenolic Compounds in Epigenetic Modulation Involved in Inflammatory Processes. Antioxidants (Basel) 2020; 9:antiox9080691. [PMID: 32756302 PMCID: PMC7464822 DOI: 10.3390/antiox9080691] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [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: 06/30/2020] [Revised: 07/18/2020] [Accepted: 07/20/2020] [Indexed: 01/09/2023] Open
Abstract
A better understanding of the interactions between dietary phenolic compounds and the epigenetics of inflammation may impact pathological conditions and their treatment. Phenolic compounds are well-known for their antioxidant, anti-inflammatory, anti-angiogenic, and anti-cancer properties, with potential benefits in the treatment of various human diseases. Emerging studies bring evidence that nutrition may play an essential role in immune system modulation also by altering gene expression. This review discusses epigenetic mechanisms such as DNA methylation, post-translational histone modification, and non-coding microRNA activity that regulate the gene expression of molecules involved in inflammatory processes. Special attention is paid to the molecular basis of NF-κB modulation by dietary phenolic compounds. The regulation of histone acetyltransferase and histone deacetylase activity, which all influence NF-κB signaling, seems to be a crucial mechanism of the epigenetic control of inflammation by phenolic compounds. Moreover, chronic inflammatory processes are reported to be closely connected to the major stages of carcinogenesis and other non-communicable diseases. Therefore, dietary phenolic compounds-targeted epigenetics is becoming an attractive approach for disease prevention and intervention.
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Affiliation(s)
- Milan Číž
- Institute of Biophysics of the Czech Academy of Sciences, 612 65 Brno, Czech Republic; (A.D.); (V.S.); (L.K.)
- Correspondence: ; Tel.: +420-541-517-104
| | - Adéla Dvořáková
- Institute of Biophysics of the Czech Academy of Sciences, 612 65 Brno, Czech Republic; (A.D.); (V.S.); (L.K.)
- Department of Experimental Biology, Faculty of Science, Masaryk University, 625 00 Brno, Czech Republic
| | - Veronika Skočková
- Institute of Biophysics of the Czech Academy of Sciences, 612 65 Brno, Czech Republic; (A.D.); (V.S.); (L.K.)
- Department of Experimental Biology, Faculty of Science, Masaryk University, 625 00 Brno, Czech Republic
| | - Lukáš Kubala
- Institute of Biophysics of the Czech Academy of Sciences, 612 65 Brno, Czech Republic; (A.D.); (V.S.); (L.K.)
- Department of Experimental Biology, Faculty of Science, Masaryk University, 625 00 Brno, Czech Republic
- International Clinical Research Center, St. Anne’s University Hospital, 656 91 Brno, Czech Republic
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Vašíček O, Hájek J, Bláhová L, Hrouzek P, Babica P, Kubala L, Šindlerová L. Cyanobacterial lipopeptides puwainaphycins and minutissamides induce disruptive and pro-inflammatory processes in Caco-2 human intestinal barrier model. Harmful Algae 2020; 96:101849. [PMID: 32560836 DOI: 10.1016/j.hal.2020.101849] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [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: 12/18/2019] [Revised: 05/25/2020] [Accepted: 05/27/2020] [Indexed: 05/24/2023]
Abstract
Puwainaphycins (PUW) and minutissamides (MIN) are cyanobacterial lipopeptides found in various cyanobacterial species. The first possible target of human exposure to them is intestinal epithelium but effect of PUW/MIN on enterocytes is not known at all. Using differentiated Caco-2 cells, PUW F was found to be cytotoxic from 5 µM concentration based on lactate dehydrogenase release assay and total protein concentration. However, it is also able to induce production of interleukin 8 in non-cytotoxic concentrations 1 and 2.5 µM detected by ELISA. Effects of MIN A and C were similar but less pronounced compared to PUW F. On the other hand, MIN D was the least toxic compound with no significant pro-inflammatory effects. Surprisingly, pro-inflammatory activation of the cells by PUW F and MIN C resulted in an increase in tight junction (TJ) protein claudin 4 expression determined by western blot analysis and confirmed by confocal microscopy. Furthermore, decrease in expression of zonula occludens 3, another TJ protein, was observed after the exposure to PUW F. Taken together, these cytotoxic lipopeptides, especially PUW F, are to be studied more deeply due to their capability to activate and/or deregulate human enterocytes in low concentrations.
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Affiliation(s)
- Ondřej Vašíček
- Institute of Biophysics of the Czech Academy of Sciences, Kralovopolska 135, Brno 612 65, Czech Republic.
| | - Jan Hájek
- Institute of Microbiology, Centre Algatech, The Czech Academy of Sciences, Novohradska 237, Trebon 379 80, Czech Republic.
| | - Lucie Bláhová
- RECETOX, Faculty of Science, Masaryk University, Kamenice 753/5, Brno 625 00, Czech Republic.
| | - Pavel Hrouzek
- Institute of Microbiology, Centre Algatech, The Czech Academy of Sciences, Novohradska 237, Trebon 379 80, Czech Republic.
| | - Pavel Babica
- RECETOX, Faculty of Science, Masaryk University, Kamenice 753/5, Brno 625 00, Czech Republic; Institute of Botany, The Czech Academy of Sciences, Lidická 25/27, Brno 602 00, Czech Republic.
| | - Lukáš Kubala
- Institute of Biophysics of the Czech Academy of Sciences, Kralovopolska 135, Brno 612 65, Czech Republic.
| | - Lenka Šindlerová
- Institute of Biophysics of the Czech Academy of Sciences, Kralovopolska 135, Brno 612 65, Czech Republic.
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22
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Vašíček O, Fedr R, Skoroplyas S, Chalupa D, Sklenář M, Tharra PR, Švenda J, Kubala L. Natural pseurotins and analogs thereof inhibit activation of B-cells and differentiation into the plasma cells. Phytomedicine 2020; 69:153194. [PMID: 32146299 DOI: 10.1016/j.phymed.2020.153194] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [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: 08/29/2019] [Revised: 01/29/2020] [Accepted: 02/21/2020] [Indexed: 06/10/2023]
Abstract
BACKGROUND The frequency of allergic diseases is constantly rising. Dysregulated production of isotype E immunoglobulins is one of the key factors behind allergic reactions and its modulation is therefore an important target for pharmacological intervention. Natural products of the pseurotin family were reported to be inhibitors of IgE production in B-cells. Mechanistic details underlying these effects are however not well understood. PURPOSE In the present study, we synthesized new analogs of natural pseurotins and extensively investigated their inhibitory effects on activation, proliferation and differentiation of B-cells, as well as on the production of IgE. STUDY DESIGN Effects of two natural pseurotins (pseurotins A and D) and a collection of fully synthetic pseurotin analogs were studied on mouse B-cells stimulated by the combination of IL-4 and E. coli lipopolysaccharide. The IgE production was determined along with cell viability and cell proliferation. The phosphorylation of selected members of the STAT transcription factor family was subsequently investigated. Finally, the in vivo effect of pseurotin D on the ovalbumin-induced delayed type hypersensitivity response was tested in mice. RESULTS We discovered that several fully synthetic pseurotin analogs were able to decrease the production of IgE in stimulated B-cells with potency comparable to that of pseurotins A and D. We found that the two natural pseurotins and the active synthetic analogs inhibited the phosphorylation of STAT3, STAT5 and STAT6 proteins in stimulated B-cells, resulting in the inhibition of B-cell proliferation and differentiation into the plasma cells. In vivo, pseurotin D decreased ovalbumin-induced foot pad edema. CONCLUSION Our results advance the current mechanistic understanding of the pseurotin-induced inhibition of IgE production in B-cells by linking the effect to STAT signaling, and associated modulation of B-cell proliferation and differentiation. Together with our finding that structurally simpler pseurotin analogs were able to reproduce the effects of natural pseurotins, the presented work has implications for the future research on these secondary metabolites in the context of allergic diseases.
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Affiliation(s)
- Ondřej Vašíček
- Institute of Biophysics of the Czech Academy of Sciences, Brno 612 65, Czech Republic; International Clinical Research Center, St. Anne's University Hospital, Brno 656 91, Czech Republic
| | - Radek Fedr
- Institute of Biophysics of the Czech Academy of Sciences, Brno 612 65, Czech Republic; International Clinical Research Center, St. Anne's University Hospital, Brno 656 91, Czech Republic
| | - Svitlana Skoroplyas
- Institute of Biophysics of the Czech Academy of Sciences, Brno 612 65, Czech Republic; Institute of Experimental Biology, Faculty of Science, Masaryk University, Brno 625 00, Czech Republic
| | - David Chalupa
- Department of Chemistry, Faculty of Science, Masaryk University, Brno 625 00, Czech Republic
| | - Matěj Sklenář
- Department of Chemistry, Faculty of Science, Masaryk University, Brno 625 00, Czech Republic
| | - Prabhakara Rao Tharra
- Department of Chemistry, Faculty of Science, Masaryk University, Brno 625 00, Czech Republic
| | - Jakub Švenda
- International Clinical Research Center, St. Anne's University Hospital, Brno 656 91, Czech Republic; Department of Chemistry, Faculty of Science, Masaryk University, Brno 625 00, Czech Republic.
| | - Lukáš Kubala
- Institute of Biophysics of the Czech Academy of Sciences, Brno 612 65, Czech Republic; International Clinical Research Center, St. Anne's University Hospital, Brno 656 91, Czech Republic; Institute of Experimental Biology, Faculty of Science, Masaryk University, Brno 625 00, Czech Republic.
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Chmelař J, Mrázek J, Hermannová M, Kubala L, Ambrožová G, Kocurková A, Drmota T, Nešporová K, Grusová L, Velebný V. Biodegradable free-standing films from lauroyl derivatives of hyaluronan. Carbohydr Polym 2019; 224:115162. [DOI: 10.1016/j.carbpol.2019.115162] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Revised: 07/01/2019] [Accepted: 08/01/2019] [Indexed: 12/15/2022]
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Binó L, Veselá I, Papežíková I, Procházková J, Vašíček O, Štefková K, Kučera J, Hanáčková M, Kubala L, Pacherník J. The depletion of p38alpha kinase upregulates NADPH oxidase 2/NOX2/gp91 expression and the production of superoxide in mouse embryonic stem cells. Arch Biochem Biophys 2019; 671:18-26. [PMID: 31176685 DOI: 10.1016/j.abb.2019.06.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [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: 05/22/2018] [Revised: 05/31/2019] [Accepted: 06/05/2019] [Indexed: 01/04/2023]
Abstract
P38alpha kinase plays an important role in the regulation of both cell stress response and cell fate. In this study, we report that p38alpha kinase-deficient embryonic stem cells exhibit a higher production of reactive oxygen species (ROS) in contrast to their wild-type counterpart. Analysis of the expressions of NADPH oxidases (NOXs) and dual oxidases, crucial enzymes involved in intracellular ROS formation, shows NOX2/gp91phox is over-expressed in p38alpha deficient cells. The particular increase in superoxide formation was confirmed by the specific detection of hydroethidine derivate 2-hydroxyethidium. ROS formation decreased when the level of NOX2 was silenced by siRNA in p38alpha deficient cells. These data suggest the importance of p38alpha kinase in the regulation of ROS metabolism in embryonic stem cells and the significance of the observed phenomena of cancer cell-like phenotypes, which is discussed.
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Affiliation(s)
- Lucia Binó
- Institute of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic; Department of Free Radical Pathophysiology, Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, Czech Republic.
| | - Iva Veselá
- Institute of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic.
| | - Iva Papežíková
- Department of Free Radical Pathophysiology, Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, Czech Republic.
| | - Jiřina Procházková
- Department of Cytokinetics, Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, Czech Republic.
| | - Ondřej Vašíček
- Department of Free Radical Pathophysiology, Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, Czech Republic.
| | - Kateřina Štefková
- Institute of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic.
| | - Jan Kučera
- Institute of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic.
| | - Markéta Hanáčková
- Institute of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic.
| | - Lukáš Kubala
- Department of Free Radical Pathophysiology, Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, Czech Republic.
| | - Jiří Pacherník
- Institute of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic.
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25
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Moosová Z, Šindlerová L, Ambrůzová B, Ambrožová G, Vašíček O, Velki M, Babica P, Kubala L. Lipopolysaccharides from Microcystis Cyanobacteria-Dominated Water Bloom and from Laboratory Cultures Trigger Human Immune Innate Response. Toxins (Basel) 2019; 11:toxins11040218. [PMID: 30978967 PMCID: PMC6520794 DOI: 10.3390/toxins11040218] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [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: 03/12/2019] [Revised: 03/27/2019] [Accepted: 04/09/2019] [Indexed: 12/20/2022] Open
Abstract
Massive toxic blooms of cyanobacteria represent a major threat to water supplies worldwide. Here, the biological activities of lipopolysaccharide (LPS) isolated from Microcystis aeruginosa, the most prominent cyanobacteria in water bloom, were studied. LPS was isolated from complex environmental water bloom samples dominated by M. aeruginosa, and from laboratory cultures of non-axenic as well as axenic M. aeruginosa strains PCC7806 and HAMBI/UHCC130. Employing human blood-based in vitro tests, the LPS isolated from complex water bloom revealed the priming of both major blood phagocyte population monocytes and polymorphonuclear leukocytes documented by the increased surface expression of CD11b and CD66b. This was accompanied by a water bloom LPS-mediated dose-dependent induction of tumor necrosis factor α, interleukin-1β, and interleukin-6 production. In accordance with its priming effects, water bloom LPS induced significant activation of p38 and ERK1/2 kinases, as well as NF-κB phosphorylation, in isolated polymorphonuclear leukocytes. Interestingly, the pro-inflammatory potential of LPS from the axenic strain of M. aeruginosa was not lower compared to that of LPS isolated from non-axenic strains. In contrast to the biological activity, water bloom LPS revealed almost twice higher pyrogenicity levels compared to Escherichia coli LPS, as analyzed by the PyroGene test. Moreover, LPS from the non-axenic culture exhibited higher endotoxin activity in comparison to LPS from axenic strains. Taking the above findings together, M. aeruginosa LPS can contribute to the health risks associated with contamination by complex water bloom mass.
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Affiliation(s)
- Zdena Moosová
- Department of Biophysics of Immune System, Institute of Biophysics, Academy of Sciences of the Czech Republic, 61265 Brno, Czech Republic.
- RECETOX, Faculty of Science, Masaryk University, 62500 Brno, Czech Republic.
| | - Lenka Šindlerová
- Department of Biophysics of Immune System, Institute of Biophysics, Academy of Sciences of the Czech Republic, 61265 Brno, Czech Republic.
- RECETOX, Faculty of Science, Masaryk University, 62500 Brno, Czech Republic.
| | - Barbora Ambrůzová
- Department of Biophysics of Immune System, Institute of Biophysics, Academy of Sciences of the Czech Republic, 61265 Brno, Czech Republic.
| | - Gabriela Ambrožová
- Department of Biophysics of Immune System, Institute of Biophysics, Academy of Sciences of the Czech Republic, 61265 Brno, Czech Republic.
| | - Ondřej Vašíček
- Department of Biophysics of Immune System, Institute of Biophysics, Academy of Sciences of the Czech Republic, 61265 Brno, Czech Republic.
- Institute of Experimental Biology, Faculty of Science, Masaryk University, 62500 Brno, Czech Republic.
| | - Mirna Velki
- Department of Biology, Josip Juraj Strossmayer University of Osijek, 31000 Osijek, Croatia.
| | - Pavel Babica
- RECETOX, Faculty of Science, Masaryk University, 62500 Brno, Czech Republic.
| | - Lukáš Kubala
- Department of Biophysics of Immune System, Institute of Biophysics, Academy of Sciences of the Czech Republic, 61265 Brno, Czech Republic.
- Institute of Experimental Biology, Faculty of Science, Masaryk University, 62500 Brno, Czech Republic.
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Šínová R, Kudová J, Nešporová K, Karel S, Šuláková R, Velebný V, Kubala L. Opioid receptors and opioid peptides in the cardiomyogenesis of mouse embryonic stem cells. J Cell Physiol 2018; 234:13209-13219. [DOI: 10.1002/jcp.27992] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2018] [Accepted: 11/21/2018] [Indexed: 12/15/2022]
Affiliation(s)
- Romana Šínová
- Department of Free Radical Pathophysiology Institute of Biophysics, Academy of Sciences of the Czech Republic Brno Czech Republic
- Institute of Experimental Biology, Faculty of Science, Masaryk University Brno Czech Republic
- Contipro a. s. Dolni Dobrouc Czech Republic
| | - Jana Kudová
- Department of Free Radical Pathophysiology Institute of Biophysics, Academy of Sciences of the Czech Republic Brno Czech Republic
| | | | | | | | | | - Lukáš Kubala
- Department of Free Radical Pathophysiology Institute of Biophysics, Academy of Sciences of the Czech Republic Brno Czech Republic
- Institute of Experimental Biology, Faculty of Science, Masaryk University Brno Czech Republic
- International Clinical Research Center, St. Anne' University Hospital Brno Czech Republic
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27
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Stříteský S, Marková A, Víteček J, Šafaříková E, Hrabal M, Kubáč L, Kubala L, Weiter M, Vala M. Printing inks of electroactive polymer PEDOT:PSS: The study of biocompatibility, stability, and electrical properties. J Biomed Mater Res A 2018; 106:1121-1128. [PMID: 29274101 DOI: 10.1002/jbm.a.36314] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [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: 09/22/2017] [Revised: 12/05/2017] [Accepted: 12/15/2017] [Indexed: 12/12/2022]
Abstract
Biocompatibility tests and a study of the electrical properties of thin films prepared from six electroactive polymer ink formulations based on poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate) (PEDOT:PSS) were performed. The aim was to find a suitable formulation of PEDOT:PSS and conditions for preparing thin films in order to construct printed bioelectronic devices for biomedical applications. The stability and electrical properties of such films were tested on organic electrochemical transistor (OECT)-based sensor platforms and their biocompatibility was evaluated in assays with 3T3 fibroblasts and murine cardiomyocytes. It was found that the thin films prepared from inks without an additive or any thin film post-treatment provide limited conductivity and stability for use in biomedical applications. These properties were greatly improved by using ethylene glycol and thermal annealing. Addition or post-treatment by ethylene glycol in combination with thermal annealing provided thin films with electrical resistance and a stability sufficient to be used in sensing of animal cell physiology. These films coated with collagen IV showed good biocompatibility in the assay with 3T3 fibroblasts when compared to standard cell culture plastics. Selected films were then used in assays with murine cardiomyocytes. We observed that these cells were able to attach to the PEDOT:PSS films and form an active sensor element. Spontaneously beating clusters were formed, indicating a good physiological status for the cardiomyocyte cells. These results open the door to construction of cheap printed electronic devices for biointerfacing in biomedical applications. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 106A: 1121-1128, 2018.
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Affiliation(s)
- Stanislav Stříteský
- Materials Research Centre, Faculty of Chemistry, Brno University of Technology, Purkyňova 118, Brno, 612 00, Czech Republic
| | - Aneta Marková
- Materials Research Centre, Faculty of Chemistry, Brno University of Technology, Purkyňova 118, Brno, 612 00, Czech Republic
| | - Jan Víteček
- Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, Brno, 612 65, Czech Republic.,International Clinical Research Center-Center of Biomolecular and Cell Engineering, St. Anne's University Hospital Brno, Pekařská 53, Brno, 656 91, Czech Republic
| | - Eva Šafaříková
- Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, Brno, 612 65, Czech Republic.,Department of Experimental Biology, Faculty of Science, Masaryk University, University Campus Bohunice, Kamenice 5, Brno, 625 00, Czech Republic
| | - Michal Hrabal
- Materials Research Centre, Faculty of Chemistry, Brno University of Technology, Purkyňova 118, Brno, 612 00, Czech Republic
| | - Lubomír Kubáč
- Centrum Organické Chemie, Rybitví 296, Rybitví, 533 54, Czech Republic
| | - Lukáš Kubala
- Institute of Biophysics of the Czech Academy of Sciences, Královopolská 135, Brno, 612 65, Czech Republic.,International Clinical Research Center-Center of Biomolecular and Cell Engineering, St. Anne's University Hospital Brno, Pekařská 53, Brno, 656 91, Czech Republic
| | - Martin Weiter
- Materials Research Centre, Faculty of Chemistry, Brno University of Technology, Purkyňova 118, Brno, 612 00, Czech Republic
| | - Martin Vala
- Materials Research Centre, Faculty of Chemistry, Brno University of Technology, Purkyňova 118, Brno, 612 00, Czech Republic
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Affiliation(s)
- Ondřej Hylse
- Department of Chemistry Masaryk University Kamenice 5 Brno 625 00 Czech Republic
- International Clinical Research Center St. Anne's University Hospital Pekařská 53 Brno 656 91 Czech Republic
| | - Lukáš Maier
- Department of Chemistry Masaryk University Kamenice 5 Brno 625 00 Czech Republic
- International Clinical Research Center St. Anne's University Hospital Pekařská 53 Brno 656 91 Czech Republic
| | - Roman Kučera
- Department of Chemistry Masaryk University Kamenice 5 Brno 625 00 Czech Republic
| | - Tomáš Perečko
- International Clinical Research Center St. Anne's University Hospital Pekařská 53 Brno 656 91 Czech Republic
- Institute of Biophysics Academy of Sciences of the Czech Republic Královopolská 135 Brno 612 65 Czech Republic
| | - Aneta Svobodová
- International Clinical Research Center St. Anne's University Hospital Pekařská 53 Brno 656 91 Czech Republic
- Institute of Biophysics Academy of Sciences of the Czech Republic Královopolská 135 Brno 612 65 Czech Republic
| | - Lukáš Kubala
- International Clinical Research Center St. Anne's University Hospital Pekařská 53 Brno 656 91 Czech Republic
- Institute of Biophysics Academy of Sciences of the Czech Republic Královopolská 135 Brno 612 65 Czech Republic
| | - Kamil Paruch
- Department of Chemistry Masaryk University Kamenice 5 Brno 625 00 Czech Republic
- International Clinical Research Center St. Anne's University Hospital Pekařská 53 Brno 656 91 Czech Republic
| | - Jakub Švenda
- Department of Chemistry Masaryk University Kamenice 5 Brno 625 00 Czech Republic
- International Clinical Research Center St. Anne's University Hospital Pekařská 53 Brno 656 91 Czech Republic
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Vašíček O, Hrouzek P, Hájek J, Kubala L, Babica P, Šindlerová LŠ. The effects of puwainaphycins F on Caco-2 cell line as a model of the intestinal barrier. Toxicol Lett 2017. [DOI: 10.1016/j.toxlet.2017.07.238] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Hylse O, Maier L, Kučera R, Perečko T, Svobodová A, Kubala L, Paruch K, Švenda J. A Concise Synthesis of Forskolin. Angew Chem Int Ed Engl 2017; 56:12586-12589. [DOI: 10.1002/anie.201706809] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Indexed: 11/11/2022]
Affiliation(s)
- Ondřej Hylse
- Department of Chemistry Masaryk University Kamenice 5 Brno 625 00 Czech Republic
- International Clinical Research Center St. Anne's University Hospital Pekařská 53 Brno 656 91 Czech Republic
| | - Lukáš Maier
- Department of Chemistry Masaryk University Kamenice 5 Brno 625 00 Czech Republic
- International Clinical Research Center St. Anne's University Hospital Pekařská 53 Brno 656 91 Czech Republic
| | - Roman Kučera
- Department of Chemistry Masaryk University Kamenice 5 Brno 625 00 Czech Republic
| | - Tomáš Perečko
- International Clinical Research Center St. Anne's University Hospital Pekařská 53 Brno 656 91 Czech Republic
- Institute of Biophysics Academy of Sciences of the Czech Republic Královopolská 135 Brno 612 65 Czech Republic
| | - Aneta Svobodová
- International Clinical Research Center St. Anne's University Hospital Pekařská 53 Brno 656 91 Czech Republic
- Institute of Biophysics Academy of Sciences of the Czech Republic Královopolská 135 Brno 612 65 Czech Republic
| | - Lukáš Kubala
- International Clinical Research Center St. Anne's University Hospital Pekařská 53 Brno 656 91 Czech Republic
- Institute of Biophysics Academy of Sciences of the Czech Republic Královopolská 135 Brno 612 65 Czech Republic
| | - Kamil Paruch
- Department of Chemistry Masaryk University Kamenice 5 Brno 625 00 Czech Republic
- International Clinical Research Center St. Anne's University Hospital Pekařská 53 Brno 656 91 Czech Republic
| | - Jakub Švenda
- Department of Chemistry Masaryk University Kamenice 5 Brno 625 00 Czech Republic
- International Clinical Research Center St. Anne's University Hospital Pekařská 53 Brno 656 91 Czech Republic
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Šafránková B, Hermannová M, Nešporová K, Velebný V, Kubala L. Absence of differences among low, middle, and high molecular weight hyaluronan in activating murine immune cells in vitro. Int J Biol Macromol 2017; 107:1-8. [PMID: 28860059 DOI: 10.1016/j.ijbiomac.2017.08.131] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2017] [Revised: 05/17/2017] [Accepted: 08/22/2017] [Indexed: 12/27/2022]
Abstract
Hyaluronan (HA) effects on immune response are suggested to be dependent on HA molecular weight (MW), as low MW HA should activate immune cells in contrast to high MW HA. However, some current studies do not support this conception and emphasize the importance of the form of preparation of HA, particularly with respect to its purity and origin. We compared the activation of mouse immune cells by HA samples (100kDa, 500kDa, and 997kDa) prepared from HA originating from rooster comb, and HA samples (71kDa, 500kDa, and 1000kDa) prepared from pharmacological grade HA originating from Streptococcus equi. Interestingly, in contrast to established theory, only middle and high MW HA originating from rooster comb induced the production of tumor necrosis factor-α by macrophages and in whole blood. Further, all tested preparations of HA failed to induce the expression of inducible nitric oxide synthase, the production of nitric oxide, or the expression of cyclooxygenase 2 in macrophages and splenocytes. Importantly, all HA samples originating from rooster comb were found to be contaminated by endotoxin (up to 1.23EU/ml). Hence, low MW HA did not reveal itself to have significantly higher immunostimulatory activity compared to HA of higher MW.
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Affiliation(s)
- Barbora Šafránková
- Contipro a.s. 401, 561 02 Dolni Dobrouc, Czech Republic; Institute of Biophysics, Academy of Sciences of the Czech Republic, 612 65 Brno, Czech Republic
| | | | - Kristina Nešporová
- Contipro a.s. 401, 561 02 Dolni Dobrouc, Czech Republic; Institute of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | | | - Lukáš Kubala
- Institute of Biophysics, Academy of Sciences of the Czech Republic, 612 65 Brno, Czech Republic; Institute of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic; International Clinical Research Center - Center of Biomolecular and Cellular Engineering, St. Anne's University Hospital, Brno, Czech Republic.
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Binó L, Procházková J, Radaszkiewicz KA, Kučera J, Kudová J, Pacherník J, Kubala L. Hypoxia favors myosin heavy chain beta gene expression in an Hif-1alpha-dependent manner. Oncotarget 2017; 8:83684-83697. [PMID: 29137374 PMCID: PMC5663546 DOI: 10.18632/oncotarget.19016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2016] [Accepted: 06/18/2017] [Indexed: 11/25/2022] Open
Abstract
The potentiation of the naturally limited regenerative capacity of the heart is dependent on an understanding of the mechanisms that are activated in response to pathological conditions such as hypoxia. Under these conditions, the expression of genes suggested to support cardiomyocyte survival and heart adaptation is triggered. Particularly important are changes in the expression of myosin heavy chain (MHC) isoforms. We propose here that alterations in the expression profiles of MHC genes are induced in response to hypoxia and are primarily mediated by hypoxia inducible factor (HIF). In in vitro models of mouse embryonic stem cell-derived cardiomyocytes, we showed that hypoxia (1% O2) or the pharmacological stabilization of HIFs significantly increased MHCbeta (Myh7) gene expression. The key role of HIF-1alpha is supported by the absence of these effects in HIF-1alpha-deficient cells, even in the presence of HIF-2alpha. Interestingly, ChIP analysis did not confirm the direct interaction of HIF-1alpha with putative HIF response elements predicted in the MHCalpha and beta encoding DNA region. Further analyses showed the significant effect of the mTOR signaling inhibitor rapamycin in inducing Myh7 expression and a hypoxia-triggered reduction in the levels of antisense RNA transcripts associated with the Myh7 gene locus. Overall, the recognized and important role of HIF in the regulation of heart regenerative processes could be highly significant for the development of novel therapeutic interventions in heart failure.
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Affiliation(s)
- Lucia Binó
- Institute of Biophysics of the CAS, Brno, Czech Republic.,Institute of Experimental Biology, Department of Physiology and Immunology of Animals, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Jiřina Procházková
- Institute of Biophysics of the CAS, Brno, Czech Republic.,Department of Histology and Embryology, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Katarzyna Anna Radaszkiewicz
- Institute of Experimental Biology, Department of Physiology and Immunology of Animals, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Jan Kučera
- Institute of Experimental Biology, Department of Physiology and Immunology of Animals, Faculty of Science, Masaryk University, Brno, Czech Republic.,International Clinical Research Center, Center of Biomolecular and Cellular Engineering, St. Anne's University Hospital Brno, Brno, Czech Republic
| | - Jana Kudová
- Institute of Biophysics of the CAS, Brno, Czech Republic.,Institute of Experimental Biology, Department of Physiology and Immunology of Animals, Faculty of Science, Masaryk University, Brno, Czech Republic.,International Clinical Research Center, Center of Biomolecular and Cellular Engineering, St. Anne's University Hospital Brno, Brno, Czech Republic
| | - Jiří Pacherník
- Institute of Experimental Biology, Department of Physiology and Immunology of Animals, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Lukáš Kubala
- Institute of Biophysics of the CAS, Brno, Czech Republic.,Institute of Experimental Biology, Department of Physiology and Immunology of Animals, Faculty of Science, Masaryk University, Brno, Czech Republic.,International Clinical Research Center, Center of Biomolecular and Cellular Engineering, St. Anne's University Hospital Brno, Brno, Czech Republic
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Radaszkiewicz KA, Sýkorová D, Binó L, Kudová J, Bébarová M, Procházková J, Kotasová H, Kubala L, Pacherník J. The acceleration of cardiomyogenesis in embryonic stem cells in vitro by serum depletion does not increase the number of developed cardiomyocytes. PLoS One 2017; 12:e0173140. [PMID: 28288171 PMCID: PMC5347996 DOI: 10.1371/journal.pone.0173140] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Accepted: 02/15/2017] [Indexed: 02/07/2023] Open
Abstract
The differentiation of pluripotent embryonic stem (ES) cells into various lineages in vitro represents an important tool for studying the mechanisms underlying mammalian embryogenesis. It is a key technique in studies evaluating the molecular mechanisms of cardiomyogenesis and heart development and also in embryotoxicology. Herein, modest modifications of the basic protocol for ES cell differentiation into cardiomyocytes were evaluated in order to increase the yield and differentiation status of developed cardiomyocytes. Primarily, the data show that ES cell cultivation in the form of non-adherent embryoid bodies (EBs) for 5 days compared to 8 days significantly improved cardiomyogenic differentiation. This is illustrated by the appearance of beating foci in the adherent EBs layer at earlier phases of differentiation from day 10 up to day 16 and by the significantly higher expression of genes characteristic of cardiomyogenic differentiation (sarcomeric alpha actinin, myosin heavy chain alpha and beta, myosin light chain 2 and 7, and transcriptional factor Nkx2.5) in EBs cultivated under non-adherent conditions for 5 days. The ratio of cardiomyocytes per other cells was also potentiated in EBs cultivated in non-adherent conditions for only 5 days followed by cultivation in adherent serum-free culture conditions. Nevertheless, the alteration in the percentage of beating foci among these two tested cultivation conditions vanished at later phases and also did not affect the total number of cardiomyocytes determined as myosin heavy chain positive cells at the end of the differentiation process on day 20. Thus, although these modifications of the conditions of ES cells differentiation may intensify cardiomyocyte differentiation, the final count of cardiomyocytes might not change. Thus, serum depletion was identified as a key factor that intensified cardiomyogenesis. Further, the treatment of EBs with N-acetylcysteine, a reactive oxygen species scavenger, did not affect the observed increase in cardiomyogenesis under serum depleted conditions. Interestingly, a mild induction of the ventricular-like phenotype of cardiomyocytes was observed in 5-day-old EBs compared to 8-day-old EBs. Overall, these findings bring crucial information on the mechanisms of ES cells differentiation into cardiomyocytes and on the establishment of efficient protocols for the cardiomyogenic differentiation of ES cells. Further, the importance of determining the absolute number of formed cardiomyocyte-like cells per seeded pluripotent cells in contrast to the simple quantification of the ratios of cells is highlighted.
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Affiliation(s)
| | - Dominika Sýkorová
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
- Department of Free Radical Pathophysiology, Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, Czech Republic
| | - Lucia Binó
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
- Department of Free Radical Pathophysiology, Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, Czech Republic
- International Clinical Research Center–Centre of Biomolecular and Cellular Engineering, St. Anne's University Hospital, Brno, Czech Republic
| | - Jana Kudová
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
- Department of Free Radical Pathophysiology, Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, Czech Republic
| | - Markéta Bébarová
- Department of Physiology, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Jiřina Procházková
- International Clinical Research Center–Centre of Biomolecular and Cellular Engineering, St. Anne's University Hospital, Brno, Czech Republic
- Department of Histology and Embryology, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Hana Kotasová
- International Clinical Research Center–Centre of Biomolecular and Cellular Engineering, St. Anne's University Hospital, Brno, Czech Republic
- Department of Histology and Embryology, Faculty of Medicine, Masaryk University, Brno, Czech Republic
| | - Lukáš Kubala
- Department of Free Radical Pathophysiology, Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, Czech Republic
- International Clinical Research Center–Centre of Biomolecular and Cellular Engineering, St. Anne's University Hospital, Brno, Czech Republic
| | - Jiří Pacherník
- Department of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
- * E-mail:
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Kudová J, Vašíček O, Číž M, Kubala L. Melatonin promotes cardiomyogenesis of embryonic stem cells via inhibition of HIF-1α stabilization. J Pineal Res 2016; 61:493-503. [PMID: 27601067 DOI: 10.1111/jpi.12366] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Accepted: 09/02/2016] [Indexed: 12/13/2022]
Abstract
Melatonin, a molecule involved in the regulation of circadian rhythms, has protective effects against myocardial injuries. However, its capability to regulate the maturation of cardiac progenitor cells is unclear. Recently, several studies have shown that melatonin inhibits the stabilization of hypoxia-inducible factors (HIFs), important signaling molecules with cardioprotective effects. In this study, by employing differentiating mouse embryonic stem cells, we report that melatonin significantly upregulated the expression of cardiac cell-specific markers (myosin heavy chains six and seven) as well as the percentage of myosin heavy chain-positive cells. Importantly, melatonin decreased HIF-1α stabilization and transcriptional activity and, in contrast, induced HIF-2α stabilization. Interestingly, the deletion of HIF-1α completely inhibited the pro-cardiomyogenic effect of melatonin as well as the melatonin-mediated HIF-2α stabilization. Moreover, melatonin increased Sirt-1 levels in a HIF-1α-dependent manner. Taken together, we provide new evidence of a time-specific inhibition of HIF-1α stabilization as an essential feature of melatonin-induced cardiomyogenesis and unexpected different roles of HIF-1α stabilization during various stages of cardiac development. These results uncover new mechanisms underlying the maturation of cardiac progenitor cells and can help in the development of novel strategies for using melatonin in cardiac regeneration therapy.
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Affiliation(s)
- Jana Kudová
- Institute of Biophysics, Czech Academy of Sciences, Brno, Czech Republic
- Institute of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Ondřej Vašíček
- Institute of Biophysics, Czech Academy of Sciences, Brno, Czech Republic
- International Clinical Research Center, Centre of Biomolecular and Cellular Engineering, St. Anne's University Hospital, Brno, Czech Republic
| | - Milan Číž
- Institute of Biophysics, Czech Academy of Sciences, Brno, Czech Republic
| | - Lukáš Kubala
- Institute of Biophysics, Czech Academy of Sciences, Brno, Czech Republic.
- International Clinical Research Center, Centre of Biomolecular and Cellular Engineering, St. Anne's University Hospital, Brno, Czech Republic.
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Nešporová K, Šógorková J, Šmejkalová D, Kulhánek J, Huerta-Angeles G, Kubala L, Velebný V. Influence of serum albumin on intracellular delivery of drug-loaded hyaluronan polymeric micelles. Int J Pharm 2016; 511:638-647. [DOI: 10.1016/j.ijpharm.2016.07.057] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2016] [Revised: 07/23/2016] [Accepted: 07/25/2016] [Indexed: 12/13/2022]
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Radaszkiewicz KA, Sýkorová D, Karas P, Kudová J, Kohút L, Binó L, Večeřa J, Víteček J, Kubala L, Pacherník J. Simple non-invasive analysis of embryonic stem cell-derived cardiomyocytes beating in vitro. Rev Sci Instrum 2016; 87:024301. [PMID: 26931869 DOI: 10.1063/1.4941776] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The analysis of digital video output enables the non-invasive screening of various active biological processes. For the monitoring and computing of the beating parameters of cardiomyocytes in vitro, CB Analyser (cardiomyocyte beating analyser) software was developed. This software is based on image analysis of the video recording of beating cardiomyocytes. CB Analyser was tested using cardiomyocytes derived from mouse embryonic stem cells at different stages of cardiomyogenesis. We observed that during differentiation (from day 18), the beat peak width decreased, which corresponded to the increased speed of an individual pulse. However, the beating frequency did not change. Further, the effects of epinephrine modulating mature cardiomyocyte functions were tested to validate the CB Analyser analysis. In conclusion, data show that CB Analyser is a useful tool for evaluating the functions of both developing and mature cardiomyocytes under various conditions in vitro.
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Affiliation(s)
| | - Dominika Sýkorová
- Institute of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Pavel Karas
- Centre for Biomedical Image Analysis, Faculty of Informatics, Masaryk University, Brno, Czech Republic
| | - Jana Kudová
- Institute of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Lukáš Kohút
- Research Center for Toxic Compounds in the Environment, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Lucia Binó
- Institute of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Josef Večeřa
- Institute of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Jan Víteček
- Institute of Biophysics ASCR v.v.i., Brno, Czech Republic
| | - Lukáš Kubala
- Institute of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - Jiří Pacherník
- Institute of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic
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Kučera L, Weinfurterová R, Dvořákova J, Kučera J, Pravda M, Foglarová M, Švík K, Klein P, Velebný V, Kubala L. Chondrocyte Cultivation in Hyaluronan-Tyramine Cross-Linked Hydrogel. INT J POLYM MATER PO 2015. [DOI: 10.1080/00914037.2014.996715] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Hnyluchová Z, Bjalončíková P, Karas P, Mravec F, Halasová T, Pekař M, Kubala L, Víteček J. A simple microviscometric approach based on Brownian motion tracking. Rev Sci Instrum 2015; 86:023710. [PMID: 25725855 DOI: 10.1063/1.4913386] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Viscosity-an integral property of a liquid-is traditionally determined by mechanical instruments. The most pronounced disadvantage of such an approach is the requirement of a large sample volume, which poses a serious obstacle, particularly in biology and biophysics when working with limited samples. Scaling down the required volume by means of microviscometry based on tracking the Brownian motion of particles can provide a reasonable alternative. In this paper, we report a simple microviscometric approach which can be conducted with common laboratory equipment. The core of this approach consists in a freely available standalone script to process particle trajectory data based on a Newtonian model. In our study, this setup allowed the sample to be scaled down to 10 μl. The utility of the approach was demonstrated using model solutions of glycerine, hyaluronate, and mouse blood plasma. Therefore, this microviscometric approach based on a newly developed freely available script can be suggested for determination of the viscosity of small biological samples (e.g., body fluids).
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Affiliation(s)
- Zuzana Hnyluchová
- Faculty of Chemistry, Brno University of Technology, Purkyňova 118, 612 00 Brno, Czech Republic
| | - Petra Bjalončíková
- Faculty of Chemistry, Brno University of Technology, Purkyňova 118, 612 00 Brno, Czech Republic
| | - Pavel Karas
- Faculty of Informatics, Masaryk University in Brno, Botanická 68A, 602 00 Brno, Czech Republic
| | - Filip Mravec
- Faculty of Chemistry, Brno University of Technology, Purkyňova 118, 612 00 Brno, Czech Republic
| | - Tereza Halasová
- Faculty of Chemistry, Brno University of Technology, Purkyňova 118, 612 00 Brno, Czech Republic
| | - Miloslav Pekař
- Faculty of Chemistry, Brno University of Technology, Purkyňova 118, 612 00 Brno, Czech Republic
| | - Lukáš Kubala
- International Clinical Research Center-Center of Biomolecular and Cell Engineering, St. Anne's University Hospital Brno, Pekařská 53, 656 91 Brno, Czech Republic
| | - Jan Víteček
- International Clinical Research Center-Center of Biomolecular and Cell Engineering, St. Anne's University Hospital Brno, Pekařská 53, 656 91 Brno, Czech Republic
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Pekarová M, Lojek A, Hrbáč J, Kuchta R, Kadlec J, Kubala L. Novel insights into the electrochemical detection of nitric oxide in biological systems. Folia Biol (Praha) 2014; 60 Suppl 1:8-12. [PMID: 25369335] [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
In recent years, microsensor technologies have made a rapid expansion into different fields of physical sciences, engineering, and biomedicine. For analyses of various biomolecules, novel sensors and detection platforms in the electrochemical field have been reported recently. The most important applications based on microelectromechanical systems dramatically reduce the need of manipulation steps with samples, while improving data quality and quantitative capabilities. This is also the case of a special class of electrochemical sensors that allow direct, real-time and non-invasive measurements of nitric oxide, whose determination is crucial for the purposes of basic research, as well as of preclinical and clinical studies. Therefore, this minireview will focus on the description of recent discoveries in the electrochemical determination of nitric oxide, released in different in vitro systems.
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Affiliation(s)
- M Pekarová
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v. v. i., Brno, Czech Republic
| | - A Lojek
- Institute of Biophysics, Academy of Sciences of the Czech Republic, v. v. i., Brno, Czech Republic
| | - J Hrbáč
- Department of Physical Chemistry, Faculty of Science, Palacky University, Olomouc, Czech Republic
| | - R Kuchta
- Faculty of Electrical Engineering and Communication, Brno University of Technology, Brno, Czech Republic
| | - J Kadlec
- Faculty of Electrical Engineering and Communication, Brno University of Technology, Brno, Czech Republic
| | - L Kubala
- Department of Physical Chemistry, Faculty of Science, Palacky University, Olomouc, Czech Republic
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Dvořáková J, Kučera L, Kučera J, Švík K, Foglarová M, Muthný T, Pravda M, Němcová M, Velebný V, Kubala L. Chondrogenic differentiation of mesenchymal stem cells in a hydrogel system based on an enzymatically crosslinked tyramine derivative of hyaluronan. J Biomed Mater Res A 2013; 102:3523-30. [PMID: 24243864 DOI: 10.1002/jbm.a.35033] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [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: 08/26/2013] [Revised: 10/24/2013] [Accepted: 11/01/2013] [Indexed: 12/12/2022]
Abstract
Hyaluronan-based tissue substitutes are promising materials in cartilage reconstruction surgery. Herein, the chondrogenesis of human mesenchymal stem cells (MSC) in a hydrogel based on a tyramine derivative of hyaluronan crosslinked by hydrogen peroxidase (HA-TA) was evaluated. Human MSC seeded in the scaffold were incubated in standard chondrogenic medium and medium enriched with bone morphogenetic protein-6 (BMP6). Cell viability, the gene expression of selected markers (collagen type II, aggrecan, SOX9, collagen type X, and osteopontin), and the histological characteristics were examined during three weeks of in vitro cultivation. The tissue reaction of both unseeded and MSC seeded HA-TA scaffolds were tested in vivo after subcutaneous application in rats for 12 weeks. The data showed that cells resisted the process of crosslinking and remained viable for the whole time while exhibiting changes in cell organization. Human MSC cultivated in HA-TA hydrogel expressed genes of both chondrogenic and osteogenic differentiation and the addition of BMP6 revealed a tendency to potentiate both processes. Histological analysis of HA-TA in vivo implants did not reveal a chronic inflammatory reaction. In both cases, in vivo HA-TA implants were continuously degraded and MSC-seeded hydrogels tended to form clusters similar to in vitro samples. In conclusion, MSC chondrogenic differentiation may proceed in a HA-TA scaffold that is biocompatible. © 2013 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 102A: 3523-3530, 2014.
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Affiliation(s)
- Jana Dvořáková
- Contipro Biotech s.r.o., 401, 561 02, Dolní Dobrouč, Czech Republic
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Bláhová L, Adamovský O, Kubala L, Švihálková Šindlerová L, Zounková R, Bláha L. The isolation and characterization of lipopolysaccharides from Microcystis aeruginosa, a prominent toxic water bloom forming cyanobacteria. Toxicon 2013; 76:187-96. [PMID: 24140921 DOI: 10.1016/j.toxicon.2013.10.011] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [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: 07/11/2013] [Revised: 09/30/2013] [Accepted: 10/08/2013] [Indexed: 02/05/2023]
Abstract
Massive toxic blooms of cyanobacteria represent a major threat to water supplies worldwide, yet serious gaps exist in understanding their complex toxic effects, including the role of lipopolysaccharides (LPS). The present comparative study focused on the levels and biological activities of LPS isolated from Microcystis aeruginosa, which is one of the most globally distributed toxic species. Using hot phenol extraction, LPS was isolated from 3 laboratory cultures and 11 natural water blooms. It formed 0.2-0.7% of the original dry biomass of the cyanobacteria, based on gravimetry. Additional analyses by commercial anti-LPS ELISA were correlated with gravimetry but showed concentrations that were about 7-times lower, which indicated either impurities in isolated LPS or the poor cross-reactivity of the antibodies used. LPS isolates from M. aeruginosa were potent pyrogens in the traditional Limulus amebocyte lysate (LAL)-test, but comparison with the PyroGene test demonstrated the limited selectivity of LAL with several interferences. The determined pyrogenicity (endotoxin units, EU) ranged from very low values in laboratory cultures (less than 0.003 up to 0.008-EU per 100 pg LPS) to higher values in complex bloom samples (0.01-0.078 EU per 100 pg of LPS), which suggested the role of bloom-associated bacteria in the overall effects. Potent pro-inflammatory effects of the studied LPS from both cultures and bloom samples were observed in a highly-relevant ex vivo human blood model by studying reactive oxygen species production in phagocytes as well as increased productions of interleukin 8, IL-8, and tumor necrosis factor α, TNF-α. LPS from M. aeruginosa seem to modulate several pathways involved in the regulation of both innate immunity and specific responses. In comparison to the standard pathogenic bacterial LPS (World Health Organization Escherichia coli O113:10 endotoxin; activity 1 EU per 100 pg), the studied cyanobacterial samples had pyrogenicity potencies that were at least 12-times lower. However, the health risks associated with LPS from M. aeruginosa should not be underestimated, especially with respect to diverse biological effects observed ex vivo and in the case of massive blooms in drinking water reservoirs, where the estimated pyrogenicity can reach up to 46,000 EU per mL of water.
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Affiliation(s)
- Lucie Bláhová
- Masaryk University, Faculty of Science, Research Centre for Toxic Compounds in the Environment (RECETOX), Kamenice 753/5, Building A29, CZ62500 Brno, Czech Republic
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Kolarova H, Klinke A, Kremserova S, Adam M, Pekarova M, Baldus S, Eiserich JP, Kubala L. Myeloperoxidase induces the priming of platelets. Free Radic Biol Med 2013; 61:357-69. [PMID: 23603662 DOI: 10.1016/j.freeradbiomed.2013.04.014] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [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: 10/21/2012] [Revised: 04/10/2013] [Accepted: 04/11/2013] [Indexed: 12/23/2022]
Abstract
The release of myeloperoxidase (MPO) from polymorphonuclear neutrophils is a hallmark of vascular inflammation and contributes to the pathogenesis of vascular inflammatory processes. However, the effects of MPO on platelets as a contributory mechanism in vascular inflammatory diseases remain unknown. Thus, MPO interaction with platelets and its effects on platelet function were examined. First, dose-dependent binding of MPO (between 1.7 and 13.8nM) to both human and mouse platelets was observed. This was in direct contrast to the absence of MPO in megakaryocytes. MPO was localized both on the surface of and inside platelets. Cytoskeleton inhibition did not prevent MPO localization inside the three-dimensional platelet structure. MPO peroxidase activity was preserved upon the MPO binding to platelets. MPO sequestered in platelets catabolized NO, documented by the decreased production of NO (on average, an approximately 2-fold decrease). MPO treatment did not affect the viability of platelets during short incubations; however, it decreased platelet viability after long-term storage for 7 days (an approximately 2-fold decrease). The activation of platelets by MPO was documented by an MPO-mediated increase in the expression of surface platelet receptors P-selectin and PECAM-1 (of about 5 to 20%) and the increased formation of reactive oxygen species (of about 15 to 200%). However, the activation was only partial, as MPO did not induce the aggregation of platelets nor potentiate platelet response to classical activators. Nor did MPO induce a significant release of the content of granules. The activation of platelets by MPO was connected with increased MPO-treated platelet interaction with polymorphonuclear leukocytes (an approximately 1.2-fold increase) in vitro. In conclusion, it can be suggested that MPO can interact with and activate platelets, which can induce priming of platelets, rather than the classical robust activation of platelets. This can contribute to the development of chronic inflammatory processes in vessels.
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Affiliation(s)
- H Kolarova
- Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, Czech Republic; Department of Animal Physiology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - A Klinke
- Department of Cardiology, University Heart Center Hamburg, University Hospital Eppendorf, Hamburg, Germany
| | - S Kremserova
- Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, Czech Republic; Department of Animal Physiology, Faculty of Science, Masaryk University, Brno, Czech Republic
| | - M Adam
- Department of Cardiology, University Heart Center Hamburg, University Hospital Eppendorf, Hamburg, Germany
| | - M Pekarova
- Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, Czech Republic
| | - S Baldus
- Department of Cardiology, University Heart Center Hamburg, University Hospital Eppendorf, Hamburg, Germany
| | - J P Eiserich
- Division of Pulmonary/Critical Care Medicine, Department of Internal Medicine, School of Medicine, University of California at Davis, Davis, CA, USA
| | - L Kubala
- Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, Czech Republic; International Clinical Research Center-Center of Biomolecular and Cellular Engineering, St. Anne's University Hospital Brno, Brno, Czech Republic.
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Ruszová E, Cheel J, Pávek S, Moravcová M, Hermannová M, Matějková I, Spilková J, Velebný V, Kubala L. Epilobium angustifolium extract demonstrates multiple effects on dermal fibroblasts in vitro and skin photo-protection in vivo. Gen Physiol Biophys 2013; 32:347-59. [PMID: 23817638 DOI: 10.4149/gpb_2013031] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2012] [Accepted: 01/17/2013] [Indexed: 11/08/2022]
Abstract
Stress-induced fibroblast senescence is thought to contribute to skin aging. Ultraviolet light (UV) radiation is the most potent environmental risk factor in these processes. An Epilobium angustifolium (EA) extract was evaluated for its capacity to reverse the senescent response of normal human dermal fibroblasts (NHDF) in vitro and to exhibit skin photo-protection in vivo. The HPLC-UV-MS analysis of the EA preparation identified three major polyphenol groups: tannins (oenothein B), phenolic acids (gallic and chlorogenic acids) and flavonoids. EA extract increased the cell viability of senescent NHDF induced by serum deprivation. It diminished connective tissue growth factor and fibronectin gene expressions in senescent NHDF. Down-regulation of the UV-induced release of both matrix metalloproteinase-1 and -3 and the tissue inhibitor of matrix metalloproteinases-1 and -2, and also down-regulation of the gene expression of hyaluronidase 2 were observed in repeatedly UV-irradiated NHDF after EA extract treatment. Interestingly, EA extract diminished the down-regulation of sirtuin 1 dampened by UV-irradiation. The application of EA extract using a sub-irritating dose protected skin against UV-induced erythema formation in vivo. In summary, EA extract diminished stress-induced effects on NHDF, particularly on connective tissue growth factor, fibronectin and matrix metalloproteinases. These results collectively suggest that EA extract may possess anti-aging properties and that the EA polyphenols might account for these benefits.
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Affiliation(s)
- Ema Ruszová
- Contipro Biotech s.r.o., Dolni Dobrouc, Czech Republic.
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Kubala L, Kolářová H, Víteček J, Kremserová S, Klinke A, Lau D, Chapman ALP, Baldus S, Eiserich JP. The potentiation of myeloperoxidase activity by the glycosaminoglycan-dependent binding of myeloperoxidase to proteins of the extracellular matrix. Biochim Biophys Acta Gen Subj 2013; 1830:4524-36. [PMID: 23707661 DOI: 10.1016/j.bbagen.2013.05.024] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2012] [Revised: 04/09/2013] [Accepted: 05/17/2013] [Indexed: 01/15/2023]
Abstract
BACKGROUND Myeloperoxidase (MPO) is an abundant hemoprotein expressed by neutrophil granulocytes that is recognized to play an important role in the development of vascular diseases. Upon degranulation from circulating neutrophil granulocytes, MPO binds to the surface of endothelial cells in an electrostatic-dependent manner and undergoes transcytotic migration to the underlying extracellular matrix (ECM). However, the mechanisms governing the binding of MPO to subendothelial ECM proteins, and whether this binding modulates its enzymatic functions are not well understood. METHODS We investigated MPO binding to ECM derived from aortic endothelial cells, aortic smooth muscle cells, and fibroblasts, and to purified ECM proteins, and the modulation of these associations by glycosaminoglycans. The oxidizing and chlorinating potential of MPO upon binding to ECM proteins was tested. RESULTS MPO binds to the ECM proteins collagen IV and fibronectin, and this association is enhanced by the pre-incubation of these proteins with glycosaminoglycans. Correspondingly, an excess of glycosaminoglycans in solution during incubation inhibits the binding of MPO to collagen IV and fibronectin. These observations were confirmed with cell-derived ECM. The oxidizing and chlorinating potential of MPO was preserved upon binding to collagen IV and fibronectin; even the potentiation of MPO activity in the presence of collagen IV and fibronectin was observed. CONCLUSIONS Collectively, the data reveal that MPO binds to ECM proteins on the basis of electrostatic interactions, and MPO chlorinating and oxidizing activity is potentiated upon association with these proteins. GENERAL SIGNIFICANCE Our findings provide new insights into the molecular mechanisms underlying the interaction of MPO with ECM proteins.
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Affiliation(s)
- Lukáš Kubala
- Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, Czech Republic.
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Papežíková I, Pekarová M, Kolářová H, Klinke A, Lau D, Baldus S, Lojek A, Kubala L. Uric acid modulates vascular endothelial function through the down regulation of nitric oxide production. Free Radic Res 2012; 47:82-8. [PMID: 23136942 DOI: 10.3109/10715762.2012.747677] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Endothelial dysfunction characterized by decreased nitric oxide (NO) bioavailability is the first stage of coronary artery disease. It is known that one of the factors associated with an increased risk of coronary artery disease is a high plasma level of uric acid. However, causative associations between hyperuricaemia and cardiovascular risk have not been definitely proved. In this work, we tested the effect of uric acid on endothelial NO bioavailability. Electrochemical measurement of NO production in acetylcholine-stimulated human umbilical endothelial cells (HUVECs) revealed that uric acid markedly decreases NO release. This finding was confirmed by organ bath experiments on mouse aortic segments. Uric acid dose-dependently reduced endothelium-dependent vasorelaxation. To reveal the mechanism of decreasing NO bioavailability we tested the effect of uric acid on reactive oxygen species production by HUVECs, on arginase activity, and on acetylcholine-induced endothelial NO synthase phosphorylation. It was found that uric acid increases arginase activity and reduces endothelial NO synthase phosphorylation. Interestingly, uric acid significantly increased intracellular superoxide formation. In conclusion, uric acid decreases NO bioavailability by means of multiple mechanisms. This finding supports the idea of a causal association between hyperuricaemia and cardiovascular risk.
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Affiliation(s)
- I Papežíková
- Department of Free Radical Patophysiology, Institute of Biophysics, v. v. i., Academy of Sciences of the Czech Republic, and International Clinical Research Center-Center of Biomolecular and Cellular Engineering, St. Anne's University Hospital Brno, Kralovopolska 135, Brno, Czech Republic.
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Víteček J, Lojek A, Valacchi G, Kubala L. Arginine-based inhibitors of nitric oxide synthase: therapeutic potential and challenges. Mediators Inflamm 2012; 2012:318087. [PMID: 22988346 PMCID: PMC3441039 DOI: 10.1155/2012/318087] [Citation(s) in RCA: 127] [Impact Index Per Article: 10.6] [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: 04/02/2012] [Accepted: 05/30/2012] [Indexed: 12/24/2022] Open
Abstract
In the past three decades, nitric oxide has been well established as an important bioactive molecule implicated in regulation of cardiovascular, nervous, and immune systems. Therefore, it is not surprising that much effort has been made to find specific inhibitors of nitric oxide synthases (NOS), the enzymes responsible for production of nitric oxide. Among the many NOS inhibitors developed to date, inhibitors based on derivatives and analogues of arginine are of special interest, as this category includes a relatively high number of compounds with good potential for experimental as well as clinical application. Though this group of inhibitors covers early nonspecific compounds, modern drug design strategies such as biochemical screening and computer-aided drug design have provided NOS-isoform-specific inhibitors. With an emphasis on major advances in this field, a comprehensive list of inhibitors based on their structural characteristics is discussed in this paper. We provide a summary of their biochemical properties as well as their observed effects both in vitro and in vivo. Furthermore, we focus in particular on their pharmacology and use in recent clinical studies. The potential of newly designed specific NOS inhibitors developed by means of modern drug development strategies is highlighted.
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Affiliation(s)
- Jan Víteček
- International Clinical Research Center-Center of Biomolecular and Cell Engineering, St. Anne's University Hospital Brno, 656 91 Brno, Czech Republic
- Institute of Biophysics, Academy of Sciences of the Czech Republic, 612 65 Brno, Czech Republic
| | - Antonín Lojek
- Institute of Biophysics, Academy of Sciences of the Czech Republic, 612 65 Brno, Czech Republic
| | - Giuseppe Valacchi
- Department of Evolutionary Biology, University of Ferrara, 44100 Ferrara, Italy
- Department of Food and Nutrition, Kyung Hee University, Seoul 130-701, Republic of Korea
| | - Lukáš Kubala
- International Clinical Research Center-Center of Biomolecular and Cell Engineering, St. Anne's University Hospital Brno, 656 91 Brno, Czech Republic
- Institute of Biophysics, Academy of Sciences of the Czech Republic, 612 65 Brno, Czech Republic
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Procházková J, Kubala L, Kotasová H, Gudernová I, Šrámková Z, Pekarová M, Sarkadi B, Pacherník J. ABC transporters affect the detection of intracellular oxidants by fluorescent probes. Free Radic Res 2011; 45:779-87. [PMID: 21568630 DOI: 10.3109/10715762.2011.579120] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Intracellular production of reactive oxygen species (ROS) plays an important role in the control of cell physiology. For the assessment of intracellular ROS production, a plethora of fluorescent probes is commonly used. Interestingly, chemical structures of these probes imply they could be substrates of plasma membrane efflux pumps, called ABC transporters. This study tested whether the determination of intracellular ROS production and mitochondrial membrane potential by selected fluorescent probes is modulated by the expression and activity of ABC transporters. The sub-clones of the HL-60 cell line over-expressing MDR1, MRP1 and BCRP transporters were employed. ROS production measured by luminol- and L-012-enhaced chemiluminescence and cytochrome c reduction assay showed similar levels of ROS production in all the employed cell lines. It was proved that dihydrorhodamine 123, dihexiloxocarbocyanine iodide, hydroethidine, tetrachloro-tetraethylbenzimidazolocarbo-cyanine iodide and tetramethylrhodamine ethyl ester perchlorate are substrates for MDR1; dichlorodihydrofluoresceine, hydroethidine and tetramethylrhodamine ethyl ester perchlorate are substrates for MRP1; dichlorodihydrofluoresceine, dihydrorhodamine 123, hydroethidine and tetrachloro-tetraethylbenzimidazolocarbo-cyanine iodide are substrates for BCRP. Thus, the determination of intracellular ROS and mitochondrial potential by the selected probes is significantly altered by ABC transporter activities. The activity of these transporters must be considered when employing fluorescent probes for the assessment of ROS production or mitochondrial membrane potential.
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Affiliation(s)
- Jiřina Procházková
- Department of Animal Physiology and Immunology, Institute of Experimental Biology, Faculty of Science, Masaryk University, Brno, Czech Republic.
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Hašová M, Crhák T, Safránková B, Dvořáková J, Muthný T, Velebný V, Kubala L. Hyaluronan minimizes effects of UV irradiation on human keratinocytes. Arch Dermatol Res 2011; 303:277-84. [PMID: 21448660 DOI: 10.1007/s00403-011-1146-8] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2011] [Revised: 03/14/2011] [Accepted: 03/16/2011] [Indexed: 01/02/2023]
Abstract
Exposure to ultraviolet (UV) irradiation has detrimental effects on skin accompanied by the increased metabolism of hyaluronan (HA), a linear polysaccharide important for the normal physiological functions of skin. In this study, the modulation of human keratinocyte response to UVB irradiation by HA (970 kDa) was investigated. Immortalized human keratinocytes (HaCaT) were irradiated by a single dose of UVB and immediately treated with HA for 6 and 24 h. The irradiation induced a significant decrease in the gene expression of CD44 and toll-like receptor 2 6 h after irradiation. The expressions of other HA receptors, including toll-like receptor 4 and the receptor for HA-mediated motility, were not detected in either the control or UVB-irradiated or HA-treated HaCaT cells. UVB irradiation induced a significant decrease in the gene expression of HA synthase-2 and hyaluronidase-2 6 h after irradiation. The expressions of HA synthase-3 and hyaluronidase-3 were not significantly modulated by UV irradiation. Interestingly, HA treatment did not significantly modulate any of these effects. In contrast, HA significantly suppressed UVB-induced pro-inflammatory cytokine release including interleukin-6 and interleukin-8. Similarly, HA treatment reduced the UVB-mediated production of transforming growth factor β1. HA treatment also significantly reduced the UV irradiation-mediated release of soluble CD44 into the media. Finally, HA partially, but significantly, suppressed the UVB-induced decrease in cell viability. Data indicate that HA had significant protective effects for HaCaT cells against UVB irradiation.
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Konopka R, Hýzdalová M, Kubala L, Pacherník J. New luminescence-based approach to measurement of luciferase gene expression reporter activity and adenosine triphosphate-based determination of cell viability. Folia Biol (Praha) 2010; 56:66-71. [PMID: 20492758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The assay employing firefly luciferase as the end-point reporter is one of the most popular gene reporter systems. However, the physiological conditions of cells may affect the reporter gene expression, which makes an assessment of cell viability desirable. Estimates of cell viability may be based on different principles. We tested for correlations between various cell viability assessments, including luminescent determination of adenosine triphosphate in whole-cell lysate, and the reporter luciferase activity in pluripotent embryonic and colon adenocarcinoma cells. Luciferase activity in cell lysate from both cell lines cultured under different conditions correlated with the amount of viable cells assessed by all of the methods employed. Importantly, it was also possible to carry out adenosine triphosphate determination in cell lysates prepared in the buffer originally designed for determining luciferase activity; it correlated significantly with adenosine triphosphate determination in cells lysed in the buffer originally designed for adenosine triphosphate determination. The results suggest that the assessment of live cells by determining adenosine triphosphate can be multiplexed with a luciferase reporter gene assay, which allows independent monitoring of both reporter expression and cell viability.
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Affiliation(s)
- R Konopka
- Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, Czech Republic
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Kolářová H, Binó L, Pejchalová K, Kubala L. The expression of NADPH oxidases and production of reactive oxygen species by human lung adenocarcinoma epithelial cell line A549. Folia Biol (Praha) 2010; 56:211-217. [PMID: 21138653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Controlled production of reactive oxygen species (ROS) by NADPH oxidases in non-phagocytic cells has recently been suggested to participate in the regulation of cellular functions. Due to the role of ROS in control of cellular functions, precise and accurate detection of ROS is of essential importance. However, various methodological approaches currently used for ROS determination vary in sensitivity, specificity, as well as in requirements for specialized equipment. In this study, human lung epithelial cell line A549 was screened for expression of NADPH oxidases NOX1, NOX2, NOX4, NOX5, DUOX1 and DUOX2 by quantitative RT-PCR. Fluorometric, colorimetric, and chemiluminometric methods were applied to determine ROS production. A549 cells were found to significantly express NOX1, NOX2, DUOX1 and DUOX2. ROS production by A549 cells was detected with fluorometric probes 2',7'-dichlorofluorescein- diacetate, dihydroethidium, and amplex red or colorimetric probe nitrobluetetrazolium. The production of ROS detected by these probes was partially reduced by NADPH oxidase inhibitor diphenyleneiodonium. The inhibitory effect of diphenyleneiodonium was the most significant regarding amplex red detection of phorbol myristate acetateactivated ROS production. In contrast to other probes, neither cytochrome c colorimetric determination nor luminol- and L-012-amplified chemiluminescence, regardless of the addition of horseradish peroxidase, exerted sufficient sensitivity to detect ROS production by A549. The results revealed differences among methods used for ROS formation measurement by human lung epithelial cell line A549 and highlighted the sensitivity of fluorometric determination for this purpose.
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Affiliation(s)
- H Kolářová
- Institute of Biophysics, Academy of Sciences of the Czech Republic, Brno, Czech Republic
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