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Chachaj-Brekiesz A, Kobierski J, Wnętrzak A, Dynarowicz-Latka P, Pietruszewska P. Insight into the Molecular Mechanism of Surface Interactions of Phosphatidylcholines─Langmuir Monolayer Study Complemented with Molecular Dynamics Simulations. J Phys Chem B 2024; 128:1473-1482. [PMID: 38320120 PMCID: PMC10875670 DOI: 10.1021/acs.jpcb.3c06810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2023] [Revised: 12/19/2023] [Accepted: 01/18/2024] [Indexed: 02/08/2024]
Abstract
Mutual interactions between components of biological membranes are pivotal for maintaining their proper biophysical properties, such as stability, fluidity, or permeability. The main building blocks of biomembranes are lipids, among which the most important are phospholipids (mainly phosphatidylcholines (PCs)) and sterols (mainly cholesterol). Although there is a plethora of reports on interactions between PCs, as well as between PCs and cholesterol, their molecular mechanism has not yet been fully explained. Therefore, to resolve this issue, we carried out systematic investigations based on the classical Langmuir monolayer technique complemented with molecular dynamics simulations. The studies involved systems containing 1,2-dipalmitoyl-sn-glycero-3-phosphocholine (DPPC) analogues possessing in the structure one or two polar functional groups similar to those of DPPC. The interactions and rheological properties of binary mixtures of DPPC analogues with 1-palmitoyl-2-oleoyl-sn-glycero-3-phosphocholine (POPC) and cholesterol were compared with reference systems (DPPC/POPC and DPPC/cholesterol). This pointed to the importance of the ternary amine group in PC/cholesterol interactions, while in PC mixtures, the phosphate group played a key role. In both cases, the esterified glycerol group had an effect on the magnitude of interactions. The obtained results are crucial for establishing structure-property relationships as well as for designing substitutes for natural lipids.
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Affiliation(s)
- Anna Chachaj-Brekiesz
- Faculty
of Chemistry, Jagiellonian University, Gronostajowa 2, 30–387 Kraków, Poland
| | - Jan Kobierski
- Department
of Pharmaceutical Biophysics, Faculty of Pharmacy, Jagiellonian University Medical College, Medyczna 9, 30–688 Kraków, Poland
| | - Anita Wnętrzak
- Faculty
of Chemistry, Jagiellonian University, Gronostajowa 2, 30–387 Kraków, Poland
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Sieprawska A, Rudolphi-Szydło E, Skórka M, Telk A, Filek M. Assessment of the oxidative stress intensity and the integrity of cell membranes under the manganese nanoparticles toxicity in wheat seedlings. Sci Rep 2024; 14:3121. [PMID: 38326390 PMCID: PMC10850514 DOI: 10.1038/s41598-024-53697-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2023] [Accepted: 02/03/2024] [Indexed: 02/09/2024] Open
Abstract
A response to manganese nanoparticles was studied in seedlings of two wheat cultivars and a model system of plant cell membranes. Nanoparticles at concentrations of 125 and 250 mg/ml were applied foliar. The application of NPs enhanced the content of Mn in plant cells, indicating its penetration through the leaf surface. The stressful effect in the plant cells was estimated based on changes in the activity of antioxidant enzymes, content of chlorophylls and starch. MnNPs evoked no significant changes in the leaf morphology, however, an increase in enzyme activity, starch accumulation, and a decrease in chlorophyll synthesis indicated the stress occurrence. Moreover, a rise in the electrokinetic potential of the chloroplast membrane surface and the reconstruction of their hydrophobic parts toward an increase in fatty acid saturation was found.
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Affiliation(s)
- Apolonia Sieprawska
- Department of Biochemistry and Biophysics, Institute of Biology, University of the National Education Commission, Podchorążych 2, 30-084, Krakow, Poland.
| | - Elżbieta Rudolphi-Szydło
- Department of Biochemistry and Biophysics, Institute of Biology, University of the National Education Commission, Podchorążych 2, 30-084, Krakow, Poland
| | - Magdalena Skórka
- Department of Biochemistry and Biophysics, Institute of Biology, University of the National Education Commission, Podchorążych 2, 30-084, Krakow, Poland
| | - Anna Telk
- Department of Analytical Chemistry, Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387, Krakow, Poland
| | - Maria Filek
- Department of Biochemistry and Biophysics, Institute of Biology, University of the National Education Commission, Podchorążych 2, 30-084, Krakow, Poland
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Rudolphi-Szydło E, Dyba B, Janeczko A, Latowski D, Sadura I, Filek M. Brassinosteroid-lipid membrane interaction under low and high temperature stress in model systems. BMC PLANT BIOLOGY 2022; 22:246. [PMID: 35585507 PMCID: PMC9118573 DOI: 10.1186/s12870-022-03619-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Accepted: 04/29/2022] [Indexed: 05/21/2023]
Abstract
BACKGROUND In earlier studies [1], we indicated that applying brassinosteroids (BRs) to lipids that had been isolated from plants altered the physicochemical properties of the monolayers. A continuation of these dependencies using the defined model lipid systems is presented in this paper. The influence of homocastasterone (HCS) and castasterone (CS) (BRs for which the increase in concentration were characteristic of plants grown at low temperatures) on the membrane properties of their polar and the hydrophobic parts were studied. RESULTS Changes in the electrokinetic potential indicate that both BRs decreased the negative charge of the surface, which is an important factor in modifying the contacts with the polar substances. This property of BRs has not yet been described. The studies of the interactions that occur in the hydrophobic part of the membrane were investigated using the EPR methods and Langmuir techniques. The physicochemical parameters of the lipid structure were determined, and the excess of Gibbs free energy was calculated. CONCLUSION We conclude that examined BRs modify both the hydrophilic and hydrophobic properties of the membranes, but to a greater extent HCS. The consequence of these changes may be the attempt to maintain the stability of the membranes in stressful temperature conditions and / or to the possibility of adsorption of other substances on membranes surfaces. The change of plant metabolism towards increasing the amount of BR, mainly HCS (under cooling) may by an important factor for maintaining optimal structural properties of membranes and their functionality despite temperature changes.
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Affiliation(s)
| | - Barbara Dyba
- Institute of Biology, Pedagogical University, Podchorążych 2, 30-084 Kraków, Poland
| | - Anna Janeczko
- Polish Academy of Sciences, The Franciszek Górski Institute of Plant Physiology, 30-239 Kraków, Poland
| | - Dariusz Latowski
- Department of Plant Physiology and Biochemistry, Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Kraków, Poland
| | - Iwona Sadura
- Polish Academy of Sciences, The Franciszek Górski Institute of Plant Physiology, 30-239 Kraków, Poland
| | - Maria Filek
- Institute of Biology, Pedagogical University, Podchorążych 2, 30-084 Kraków, Poland
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Electroporation, electrochemotherapy and electro-assisted drug delivery in cancer. A state-of-the-art review. Biophys Chem 2022; 286:106819. [DOI: 10.1016/j.bpc.2022.106819] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Revised: 04/06/2022] [Accepted: 04/12/2022] [Indexed: 01/08/2023]
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Weigt D, Niemann J, Siatkowski I, Zyprych-Walczak J, Olejnik P, Kurasiak-Popowska D. Effect of Zearalenone and Hormone Regulators on Microspore Embryogenesis in Anther Culture of Wheat. PLANTS 2019; 8:plants8110487. [PMID: 31717618 PMCID: PMC6918171 DOI: 10.3390/plants8110487] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2019] [Revised: 11/02/2019] [Accepted: 11/07/2019] [Indexed: 11/22/2022]
Abstract
The purpose of this work was to assess the impact of zearalenone (ZEN) and selected hormone regulators on the effectiveness of microspore embryogenesis in anther culture of wheat. The plant material comprised F1 hybrids of winter and spring wheat. Six combinations of media inducing microspore proliferation and formation of embryogenic structures were investigated: two combinations of growth regulators (D - 2,4-D + dicamba, K - 2,4-D + kinetin), each with three ZEN concentrations (0 mL/L, 0.1 mL/L, 0.2 mL/L). A significant increase in microspore embryogenesis effectiveness on media with the addition of ZEN was observed both at the stages of its induction and the formation of green plants in some genotypes. In case of both combinations of growth regulators, an increased concentration of ZEN resulted in more effective induction of microspore embryogenesis. The most effective induction medium was the D medium supplemented with 0.2 mL/L ZEN. As a result of the use of zearalenone together with two combinations of growth regulators, all genotypes tested produced androgenic structures, which indicates the breakdown of genotypic recalcitrant in the analysed hybrids. In addition, green plants were obtained from 18 out of 19 tested hybrids. The addition of ZEN to the medium did not affect the number of regenerated albino plants nor the number of spontaneous genome doublings proportion.
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Affiliation(s)
- Dorota Weigt
- Department of Genetics and Plant Breeding, Poznań University of Life Sciences, 11 Dojazd St., 60–632 Poznań, Poland
| | - Janetta Niemann
- Department of Genetics and Plant Breeding, Poznań University of Life Sciences, 11 Dojazd St., 60–632 Poznań, Poland
- Correspondence:
| | - Idzi Siatkowski
- Department of Mathematical and Statistical Methods, Poznań University of Life Sciences, 28 Wojska Polskiego St., 60–637 Poznań, Poland
| | - Joanna Zyprych-Walczak
- Department of Mathematical and Statistical Methods, Poznań University of Life Sciences, 28 Wojska Polskiego St., 60–637 Poznań, Poland
| | - Przemysław Olejnik
- Department of Genetics and Plant Breeding, Poznań University of Life Sciences, 11 Dojazd St., 60–632 Poznań, Poland
| | - Danuta Kurasiak-Popowska
- Department of Genetics and Plant Breeding, Poznań University of Life Sciences, 11 Dojazd St., 60–632 Poznań, Poland
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Gzyl-Malcher B, Rudolphi-Skórska E, Sieprawska A, Filek M. Manganese protects wheat from the mycotoxin zearalenone and its derivatives. Sci Rep 2019; 9:14214. [PMID: 31578385 PMCID: PMC6775100 DOI: 10.1038/s41598-019-50664-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2019] [Accepted: 09/17/2019] [Indexed: 01/24/2023] Open
Abstract
Searching for factors that reduce zearalenone (ZEN) toxicity is an important challenge in wheat production, considering that this crop is a basic dietary ingredient. ZEN, absorbed by cells, is metabolized into α-zearalenol and α-zearalanol, and this study focused on the function of manganese ions as potential protectants against the mycotoxins. Stress effects were invoked by an application of 30 µM ZEN and its derivatives. Manganese ions were applied at 100 µM, not stress-inducing concentration. Importance of the biomembrane structures in the absorption of the mycotoxins was demonstrated in in vitro wheat calli and on model membranes. ZEN showed the greatest and α-zearalanol the smallest stressogenic effect manifested as a decrease in the calli growth. This was confirmed by variable increase in antioxidant enzyme activity. Mn ions added to the toxin mixture diminished stressogenic properties of the toxins. Variable decrease in total lipid content and the percentage of phospholipid fraction detected in calli cells exposed to ZEN and its metabolites indicated significance of the membrane structure. An analysis of physicochemical parameters of model membranes build from phosphatidylcholine, a basic lipid in native membranes, and its mixture with the tested toxins made by Langmuir technique and verified by Brewster angle microscopy, confirmed variable contribution of ZEN and its derivatives to the modification of membrane properties. The order of toxicity was as follows: ZEN ≥ α-zearalenol > α-zearalanol. Manganese ions present in the hydrophilic phase interacted with polar lipid groups and reduced the extent of membrane modification caused by the mycotoxins.
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Affiliation(s)
- Barbara Gzyl-Malcher
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387, Kraków, Poland
| | | | - Apolonia Sieprawska
- Institute of Biology, Pedagogical University, Podchorążych 2, Kraków, 30-084, Kraków, Poland.
| | - Maria Filek
- Institute of Biology, Pedagogical University, Podchorążych 2, Kraków, 30-084, Kraków, Poland
- Polish Academy of Science, The Franciszek Górski Institute of Plant Physiology, Niezapominajek 21, 30-239, Kraków, Poland
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Filek M, Sieprawska A, Kościelniak J, Oklestkova J, Jurczyk B, Telk A, Biesaga-Kościelniak J, Janeczko A. The role of chloroplasts in the oxidative stress that is induced by zearalenone in wheat plants - The functions of 24-epibrassinolide and selenium in the protective mechanisms. PLANT PHYSIOLOGY AND BIOCHEMISTRY : PPB 2019; 137:84-92. [PMID: 30769236 DOI: 10.1016/j.plaphy.2019.01.030] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 01/29/2019] [Accepted: 01/29/2019] [Indexed: 06/09/2023]
Abstract
This study focused on the idea that the toxic effect of zearalenone (ZEA) and the protective actions of the brassinosteroid - 24-epibrassinolide (EBR) as well as selenium are dependent on its accumulation in chloroplasts to a high degree. These organelles were isolated from the leaves of oxidative stress-sensitive and stress-tolerant wheat cultivars that had been grown from grains that had been incubated in a solution of ZEA (30 μM), Na2SeO4 (Se, 10 μM), EBR (0.1 μM) or in a mixture of ZEA with Se or EBR. Ultra-high performance liquid chromatography techniques indicated that ZEA was adsorbed in higher amounts in the chloroplasts in the sensitive rather than tolerant cultivar. Although the brassinosteroids and Se were also accumulated in the chloroplasts, higher levels were only found in the tolerant cultivar. The application of EBR increased the homocastasterone content, especially in the chloroplasts of the tolerant plant and after the addition of ZEA. The presence of both protectants caused a decrease in the ZEA content in studied organelles and resulted in diminishing of the oxidative stress (i.e. changes in the activity of the antioxidative enzymes). Moreover, a recovery of photosystem II and decrease in the negative impact of ZEN on Hsp90 transcript accumulation was observed in plants.
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Affiliation(s)
- Maria Filek
- Polish Academy of Sciences, The Franciszek Górski Institute of Plant Physiology, Niezapominajek 21, 30-239, Kraków, Poland; Institute of Biology, Pedagogical University, Podchorążych 2, 30-084, Kraków, Poland
| | - Apolonia Sieprawska
- Institute of Biology, Pedagogical University, Podchorążych 2, 30-084, Kraków, Poland
| | - Janusz Kościelniak
- Faculty of Agriculture and Economics, University of Agriculture in Kraków, Podłużna 3, 30-239, Kraków, Poland
| | - Jana Oklestkova
- Laboratory of Growth Regulators, Centre of the Region Haná for Biotechnological and Agricultural Research, Institute of Experimental Botany ASCR & Palacký University, Šlechtitelů 27, 78371, Olomouc, Czech Republic
| | - Barbara Jurczyk
- Faculty of Agriculture and Economics, University of Agriculture in Kraków, Podłużna 3, 30-239, Kraków, Poland
| | - Anna Telk
- Faculty of Chemistry, Jagiellonian University, Gronostajowa 2, 30-387, Kraków, Poland
| | - Jolanta Biesaga-Kościelniak
- Polish Academy of Sciences, The Franciszek Górski Institute of Plant Physiology, Niezapominajek 21, 30-239, Kraków, Poland
| | - Anna Janeczko
- Polish Academy of Sciences, The Franciszek Górski Institute of Plant Physiology, Niezapominajek 21, 30-239, Kraków, Poland.
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Barbasz A, Rudolphi-Skórska E, Filek M, Janeczko A. Exposure of human lymphoma cells (U-937) to the action of a single mycotoxin as well as in mixtures with the potential protectors 24-epibrassinolide and selenium ions. Mycotoxin Res 2019; 35:89-98. [PMID: 30411199 PMCID: PMC6331508 DOI: 10.1007/s12550-018-0334-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2018] [Revised: 10/19/2018] [Accepted: 10/25/2018] [Indexed: 01/02/2023]
Abstract
The progressive contamination of food products by mycotoxins such as zearalenone (ZEN) has prompted the search for specific substances that can act as protectors against an accumulation of these toxins. This paper discusses the effect of selenium ions and 24-epibrassinolide (EBR) as non-organic and organic compounds that preserve human lymphoblastic cells U-937 under ZEN stressogenic conditions. Based on measurements of cell viability and a DAPI test, concentrations of ZEN at 30 μmol/l, Se at 2.5 μmol/l and EBR at 0.005 μmol/l were selected. The addition of both protectors resulted in an increase in the viability of ZEN-treated cells by about 16%. This effect was connected with a decrease in lipid peroxidation (a decrease in the malonyldialdehyde content) and the generation of reactive oxygen species, which were determined by a cellular ROS/superoxide detection assay and the SOD activity. The Se protection was observed as the blocking of the all excess ROS, while the EBR action was mainly concentrated on something other than the superoxide radical itself. The experiments on the model lipid membranes that mimic the environment of U-937 cells confirmed the affect of ZEN on the structure and physicochemical properties of human membranes. Although the presence of both Se and EBR reduced the effect of ZEN by blocking its interaction with a membrane, the action of Se was more evident.
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Affiliation(s)
- Anna Barbasz
- Institute of Biology, Pedagogical University of Cracow, Podchorążych 2, 30-084, Cracow, Poland
| | | | - Maria Filek
- Institute of Biology, Pedagogical University of Cracow, Podchorążych 2, 30-084, Cracow, Poland
- Institute of Plant Physiology, Polish Academy of Sciences, Podłużna 3, 30-239, Cracow, Poland
| | - Anna Janeczko
- Institute of Plant Physiology, Polish Academy of Sciences, Podłużna 3, 30-239, Cracow, Poland
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Kornaś A, Filek M, Sieprawska A, Bednarska-Kozakiewicz E, Gawrońska K, Miszalski Z. Foliar application of selenium for protection against the first stages of mycotoxin infection of crop plant leaves. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2019; 99:482-485. [PMID: 29808470 DOI: 10.1002/jsfa.9145] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2017] [Revised: 05/18/2018] [Accepted: 05/18/2018] [Indexed: 05/21/2023]
Abstract
BACKGROUND The aim of this study was to investigate whether the application of selenium (Se) ions directly to the leaf surface can protect plants against infection by the fungal toxin zearalenone (ZEA). The experiments were performed for the most common and agronomically important crops such as wheat, oat, and barley (both tolerant and sensitive varieties) because mycotoxin accumulation in plants is the cause of many diseases in animals and people. RESULTS ZEA at a concentration of 10 µmol L-1 either alone or in combination with Se (5 µmol L-1 Na2 SeO4 ) was applied to the second leaf of seedlings. Visualization of leaf temperature profiles by infrared thermography demonstrated a decrease in temperature at the location of ZEA infection that was more noticeable in sensitive genotypes. The presence of Se significantly suppressed changes at the site of ZEA application in all tested plants, especially the tolerant genotypes. Microscopic observations confirmed that foliar administration of ZEA resulted in its penetration to deeper localized cells and that damage induced by ZEA (mainly to chloroplasts) decreased after Se application. Analyses of antioxidant enzymes demonstrated the involvement of Se in antioxidation mechanisms, in particular by activating SOD and CAT under ZEA-induced stress conditions. CONCLUSION The foliar application of Se to seedling leaves may be a non-invasive method of protecting crops against the first steps of ZEA infection. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Andrzej Kornaś
- Institute of Biology, Pedagogical University, Kraków, Poland
| | - Maria Filek
- Polish Academy of Sciences, The Franciszek Górski Institute of Plant Physiology, Cracow, Poland
| | | | | | | | - Zbigniew Miszalski
- Polish Academy of Sciences, The Franciszek Górski Institute of Plant Physiology, Cracow, Poland
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