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Dudek A, Szulc N, Pawlak A, Strugała-Danak P, Krawczyk-Łebek A, Perz M, Kostrzewa-Susłow E, Pruchnik H. Structural investigation of interactions between halogenated flavonoids and the lipid membrane along with their role as cytotoxic agents. Sci Rep 2024; 14:10561. [PMID: 38719884 PMCID: PMC11078956 DOI: 10.1038/s41598-024-61037-y] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Accepted: 04/30/2024] [Indexed: 05/12/2024] Open
Abstract
This study focuses on understanding the structural and molecular changes in lipid membranes under the influence of six halogenated flavonoid derivatives differing in the number and position of substitution of chlorine and bromine atoms (D1-D6). Utilizing various analytical techniques, including fluorometric methods, dynamic light scattering (DLS), attenuated Fourier transform infrared spectroscopy (ATR- FTIR), and FT-Raman spectroscopy, the research aims to elucidate the mechanisms underlying the interaction of flavonoids with cell membranes. Additionally, the study includes in silico analyses to explore the physicochemical properties of these compounds and their potential pharmaceutical applications, along with toxicity studies to assess their effects on cancer, normal, and red blood cells. Our study showed the ability of halogenated derivatives to interact mostly with the outer part of the membrane, especially in the lipid heads region however, some of them were able to penetrate deeper into the membrane and affect the fluidity of hydrocarbon chains. The potential to reduce cancer cell viability, the lack of toxicity towards erythrocytes, and the favourable physicochemical and pharmacokinetic properties suggest these halogenated flavonoids potential candidates for exploring their potential for medical use.
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Affiliation(s)
- Anita Dudek
- Department of Physics and Biophysics, Faculty of Biotechnology and Food Sciences, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375, Wrocław, Poland.
| | - Natalia Szulc
- Department of Physics and Biophysics, Faculty of Biotechnology and Food Sciences, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375, Wrocław, Poland
| | - Aleksandra Pawlak
- Department of Pharmacology and Toxicology, Faculty of Veterinary Medicine, Wrocław University of Environmental and Life Sciences, Norwida 31, 50-375, Wrocław, Poland
| | - Paulina Strugała-Danak
- Department of Physics and Biophysics, Faculty of Biotechnology and Food Sciences, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375, Wrocław, Poland
| | - Agnieszka Krawczyk-Łebek
- Department of Food Chemistry and Biocatalysis, Faculty of Biotechnology and Food Sciences, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375, Wrocław, Poland
| | - Martyna Perz
- Department of Food Chemistry and Biocatalysis, Faculty of Biotechnology and Food Sciences, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375, Wrocław, Poland
| | - Edyta Kostrzewa-Susłow
- Department of Food Chemistry and Biocatalysis, Faculty of Biotechnology and Food Sciences, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375, Wrocław, Poland
| | - Hanna Pruchnik
- Department of Physics and Biophysics, Faculty of Biotechnology and Food Sciences, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375, Wrocław, Poland
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Dudek A, Strugała-Danak P, Kral T, Hof M, Pruchnik H. An analysis of interactions between three structurally diverse anthocyanidins, as well as their glucosides, and model biological membranes, albumin, and plasmid DNA. Sci Rep 2023; 13:12883. [PMID: 37558717 PMCID: PMC10412636 DOI: 10.1038/s41598-023-39470-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Accepted: 07/26/2023] [Indexed: 08/11/2023] Open
Abstract
The aim of the study is to investigate the differences in the interaction of three structurally diverse anthocyanidins, namely peonidin, petunidin, and delphinidin, as well as their glucosides with model biological membranes, human albumin, and plasmid DNA in order to look into their structure-activity relationships. Fluorimetric studies, as well as ATR-FTIR analyses, were jointly used in order to determine the changes observed in both the hydrophilic and hydrophobic layers of cell-mimic membranes (MM) which reflected the membrane lipid composition of tumour cells and red blood cell membranes (RBCM). Our results showed that anthocyanins and anthocyanidins can cause an increase in the packing order of the polar heads of lipids, as well as interact with their deeper layers by reducing the fluidity of lipid chains. The results presented here indicate that all compounds tested here possessed the ability to bind to human serum albumin (HSA) and the presence of a glucose molecule within the structures formed by anthocyanidin reduces their ability to bind to proteins. Using fluorescence correlation spectroscopy, it was demonstrated that the compounds tested here were capable of forming stable complexes with plasmid DNA and, particularly, strong DNA conformational changes were observed in the presence of petunidin and corresponding glucoside, as well as delphinidin. The results we obtained can be useful in comprehending the anthocyanins therapeutic action as molecular antioxidants and provide a valuable insight into their mechanism of action.
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Affiliation(s)
- Anita Dudek
- Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, C. K. Norwida 25, 50-375, Wrocław, Poland
| | - Paulina Strugała-Danak
- Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, C. K. Norwida 25, 50-375, Wrocław, Poland.
| | - Teresa Kral
- Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, C. K. Norwida 25, 50-375, Wrocław, Poland
- Department of Biophysical Chemistry, J. Heyrovsky Institute of Physical Chemistry of the Czech Academy of Sciences, Dolejskova 3, 18223, Prague 8, Czech Republic
| | - Martin Hof
- Department of Biophysical Chemistry, J. Heyrovsky Institute of Physical Chemistry of the Czech Academy of Sciences, Dolejskova 3, 18223, Prague 8, Czech Republic
| | - Hanna Pruchnik
- Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, C. K. Norwida 25, 50-375, Wrocław, Poland
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Hernik D, Szczepańska E, Ghezzi MC, Brenna E, Włoch A, Pruchnik H, Mularczyk M, Marycz K, Olejniczak T, Boratyński F. Chemo-enzymatic synthesis and biological activity evaluation of propenylbenzene derivatives. Front Microbiol 2023; 14:1223123. [PMID: 37434714 PMCID: PMC10330721 DOI: 10.3389/fmicb.2023.1223123] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Accepted: 06/12/2023] [Indexed: 07/13/2023] Open
Abstract
Propenylbenzenes, including isosafrole, anethole, isoeugenol, and their derivatives, are natural compounds found in essential oils from various plants. Compounds of this group are important and valuable, and are used in the flavour and fragrance industries as well as the pharmaceutical and cosmetic industries. The aim of this study was to develop an efficient process for synthesising oxygenated derivatives of these compounds and evaluate their potential biological activities. In this paper, we propose a two-step chemo-enzymatic method. The first step involves the synthesis of corresponding diols 1b-5b from propenylbenzenes 1a-5avia lipase catalysed epoxidation followed by epoxide hydrolysis. The second step involves the microbial oxidation of a diasteroisomeric mixture of diols 1b-5b to yield the corresponding hydroxy ketones 1c-4c, which in this study was performed on a preparative scale using Dietzia sp. DSM44016, Rhodococcus erythropolis DSM44534, R. erythropolis PCM2150, and Rhodococcus ruber PCM2166. Application of scaled-up processes allowed to obtain hydroxy ketones 1-4c with the following yield range 36-62.5%. The propenylbenzene derivatives thus obtained and the starting compounds were tested for various biological activities, including antimicrobial, antioxidant, haemolytic, and anticancer activities, and their impact on membrane fluidity. Fungistatic activity assay against selected strains of Candida albicans results in MIC50 value varied from 37 to 124 μg/mL for compounds 1a, 3a-c, 4a,b, and 5a,b. The highest antiradical activity was shown by propenylbenzenes 1-5a with a double bond in their structure with EC50 value ranged from 19 to 31 μg/mL. Haemolytic activity assay showed no cytotoxicity of the tested compounds on human RBCs whereas, compounds 2b-4b and 2c-4c affected the fluidity of the RBCs membrane. The tested compounds depending on their concentration showed different antiproliferative activity against HepG2, Caco-2, and MG63. The results indicate the potential utility of these compounds as fungistatics, antioxidants, and proliferation inhibitors of selected cell lines.
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Affiliation(s)
- Dawid Hernik
- Department of Food Chemistry and Biocatalysis, Wroclaw University of Environmental and Life Sciences, Wrocław, Poland
| | - Ewa Szczepańska
- Department of Food Chemistry and Biocatalysis, Wroclaw University of Environmental and Life Sciences, Wrocław, Poland
| | - Maria Chiara Ghezzi
- Dipartimento di Chimica, Materiali ed Ingegneria Chimica “Giulio Natta”, Politecnico di Milano, Milan, Italy
| | - Elisabetta Brenna
- Dipartimento di Chimica, Materiali ed Ingegneria Chimica “Giulio Natta”, Politecnico di Milano, Milan, Italy
| | - Aleksandra Włoch
- Department of Physics and Biophysics, Wroclaw University of Environmental and Life Sciences, Wrocław, Poland
| | - Hanna Pruchnik
- Department of Physics and Biophysics, Wroclaw University of Environmental and Life Sciences, Wrocław, Poland
| | - Malwina Mularczyk
- Department of Experimental Biology, Wroclaw University of Environmental and Life Sciences, Wrocław, Poland
| | - Krzysztof Marycz
- Department of Experimental Biology, Wroclaw University of Environmental and Life Sciences, Wrocław, Poland
| | - Teresa Olejniczak
- Department of Food Chemistry and Biocatalysis, Wroclaw University of Environmental and Life Sciences, Wrocław, Poland
| | - Filip Boratyński
- Department of Food Chemistry and Biocatalysis, Wroclaw University of Environmental and Life Sciences, Wrocław, Poland
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Gładkowski W, Chojnacka A, Włoch A, Pruchnik H, Grudniewska A, Dunal A, Dudek A, Maciejewska G, Rudzińska M. Conjugates of 1,3- and 1,2-Acylglycerols with Stigmasterol - Synthesis, NMR Characterization and Impact on Lipid Bilayers. Chempluschem 2023; 88:e202300161. [PMID: 36997498 DOI: 10.1002/cplu.202300161] [Citation(s) in RCA: 2] [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: 03/28/2023] [Revised: 03/30/2023] [Accepted: 03/30/2023] [Indexed: 04/01/2023]
Abstract
The main aim of research was synthesis and spectroscopic characterization of new conjugates in which stigmasterol was linked via carbonate or succinyl linker with 1,3- and 1,2-acylglycerols of palmitic and oleic acid. Acylglycerols containing stigmasterol residue at internal position have been synthesized from 2-benzyloxypropane-1,3-diol or dihydroxyacetone. Their asymmetric counterparts containing stigmasterol residue attached to sn-3 position have been obtained from (S)-solketal. Eight synthesized conjugates were used to create the liposomes as nanocarriers of phytosterols to increase their stability and protect them from degradation during thermal-oxidative treatments. Fluorimetric and ATR-FTIR methods were used to determine the impact of synthesized conjugates on the physicochemical properties of the lipid bilayer. The results indicate that conjugates with palmitic acid are better candidates for use as the potential stigmasterol nanocarriers compared to those with oleic acid because they increase the stiffness of the lipid bilayer and temperature of the main phase transition. The obtained results are the first step in designing of stigmasterol-enriched liposomal carriers with higher thermo-oxidative stability for their potential use in the food industry.
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Affiliation(s)
- Witold Gładkowski
- Wroclaw University of Environmental and Life Sciences: Uniwersytet Przyrodniczy we Wroclawiu, Department of Food Chemistry and Biocatalysis, Norwida 25, 50-375, Wrocław, POLAND
| | - Anna Chojnacka
- Wrocław University of Environmental and Life Sciences: Uniwersytet Przyrodniczy we Wroclawiu, Food Chemistry and Biocatalysis, POLAND
| | - Aleksandra Włoch
- Wroclaw University of Environmental and Life Sciences: Uniwersytet Przyrodniczy we Wroclawiu, Department of Physics and Biophysics, Norwida 25, 50-375, Wrocław, POLAND
| | - Hanna Pruchnik
- Wroclaw University of Environmental and Life Sciences: Uniwersytet Przyrodniczy we Wroclawiu, Department of Physics and Biophysics, Norwida 25, 50-375, Wrocław, POLAND
| | - Aleksandra Grudniewska
- Wrocław University of Environmental and Life Sciences: Uniwersytet Przyrodniczy we Wroclawiu, Department of Food Chemistry and Biocatalysis, Norwida 25, 50-375, Wrocław, POLAND
| | - Anna Dunal
- Wroclaw University of Environmental and Life Sciences: Uniwersytet Przyrodniczy we Wroclawiu, Department of Food Chemistry and Biocatalysis, Norwida 25, 50-375, Wrocław, POLAND
| | - Anita Dudek
- Wroclaw University of Environmental and Life Sciences: Uniwersytet Przyrodniczy we Wroclawiu, Department of Physics and Biophysics, Norwida 25, 50-375, Wrocław, POLAND
| | - Gabriela Maciejewska
- Wroclaw University of Technology: Politechnika Wroclawska, Faculty of Chemistry, Norwida 4/6, 50-375, Wroclaw, POLAND
| | - Magdalena Rudzińska
- Poznan University of Life Sciences: Uniwersytet Przyrodniczy w Poznaniu, Faculty of Food Science and Nutrition, Wojska Polskiego 28, 60-637, Poznań, POLAND
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Pruchnik H, Włoch A, Gładkowski W, Grudniewska A, Chojnacka A, Krzemiński M, Rudzińska M. Effect of Distigmasterol-Modified Acylglycerols on the Fluidity and Phase Transition of Lipid Model Membranes. Membranes (Basel) 2022; 12:membranes12111054. [PMID: 36363609 PMCID: PMC9698068 DOI: 10.3390/membranes12111054] [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] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 10/18/2022] [Accepted: 10/25/2022] [Indexed: 05/10/2023]
Abstract
Plant sterols are known for their health-promoting effects, lowering blood cholesterol levels and alleviating cardiovascular disease. In this work, we continue our research on the asymmetric acylglycerols in which fatty acid residues are replaced by two stigmasterol residues in sn-1 and sn-2 or sn-2 and sn-3 positions as new thermostable carriers of phytosterols for their potential application in foods or as components of new liposomes in the pharmaceutical industry. The aim of this manuscript was to compare and analyze the effects of four distigmasterol-modified acylglycerols (dStigMAs) on the fluidity and the main phase transition temperature of the model phospholipid membrane. Their properties were determined using differential scanning calorimetry (DSC), steady-state fluorimetry and attenuated total reflectance Fourier-transform infrared spectroscopy (ATR-FTIR). The determination of the effect of the tested compounds on the mentioned physicochemical parameters of the model membranes will allow for the determination of their properties and stability, which is essential for their practical application. The results indicated that all compounds effect on the physicochemical properties of the model membrane. The degree of these changes depends on the structure of the compound, especially the type of linker by which stigmasterol is attached to the glycerol backbone, as well as on the type of hydrocarbon chain.
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Affiliation(s)
- Hanna Pruchnik
- Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland
| | - Aleksandra Włoch
- Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland
- Correspondence:
| | - Witold Gładkowski
- Department of Food Chemistry and Biocatalysis, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland
| | - Aleksandra Grudniewska
- Department of Food Chemistry and Biocatalysis, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland
| | - Anna Chojnacka
- Department of Food Chemistry and Biocatalysis, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland
| | - Mateusz Krzemiński
- Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland
| | - Magdalena Rudzińska
- Faculty of Food Science and Nutrition, Poznań University of Life Sciences, 60-637 Poznań, Poland
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Gładkowski W, Włoch A, Pruchnik H, Chojnacka A, Grudniewska A, Wysota A, Dunal A, Rubiano Castro D, Rudzińska M. Acylglycerols of Myristic Acid as New Candidates for Effective Stigmasterol Delivery-Design, Synthesis, and the Influence on Physicochemical Properties of Liposomes. Molecules 2022; 27:molecules27113406. [PMID: 35684341 PMCID: PMC9182174 DOI: 10.3390/molecules27113406] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 05/17/2022] [Accepted: 05/23/2022] [Indexed: 11/30/2022] Open
Abstract
New carriers of phytosterols; acylglycerols containing natural myristic acid at sn-1 and sn-3 positions and stigmasterol residue linked to sn-2 position by carbonate and succinate linker have been designed and synthesized in three-step synthesis from dihydroxyacetone (DHA). The synthetic pathway involved Steglich esterification of DHA with myristic acid; reduction of carbonyl group of 1,3-dimyristoylpropanone and esterification of 1,3-dimyristoylglicerol with stigmasterol chloroformate or stigmasterol hemisuccinate. The structure of the obtained hybrids was established by the spectroscopic methods (NMR; IR; HRMS). Obtained hybrid molecules were used to form new liposomes in the mixture with model phospholipid and their effect on their physicochemical properties was determined, including the polarity, fluidity, and main phase transition of liposomes using differential scanning calorimetry and fluorimetric methods. The results confirm the significant effect of both stigmasterol-containing acylglycerols on the hydrophilic and hydrophobic region of liposome membranes. They significantly increase the order in the polar heads of the lipid bilayer and increase the rigidity in the hydrophobic region. Moreover, the presence of both acylglycerols in the membranes shifts the temperature of the main phase transition towards higher temperatures. Our results indicate stabilization of the bilayer over a wide temperature range (above and below the phase transition temperature), which in addition to the beneficial effects of phytosterols on human health makes them more attractive components of novel lipid nanocarriers compared to cholesterol.
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Affiliation(s)
- Witold Gładkowski
- Department of Food Chemistry and Biocatalysis, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland; (A.C.); (A.G.); (A.W.)
- Correspondence: (W.G.); (A.W.); (A.D.); Tel.: +48-71-3205-154 (W.G.); +48-71-3205-461 (A.W.); +48-724-540-245 (A.D.)
| | - Aleksandra Włoch
- Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland;
- Correspondence: (W.G.); (A.W.); (A.D.); Tel.: +48-71-3205-154 (W.G.); +48-71-3205-461 (A.W.); +48-724-540-245 (A.D.)
| | - Hanna Pruchnik
- Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland;
| | - Anna Chojnacka
- Department of Food Chemistry and Biocatalysis, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland; (A.C.); (A.G.); (A.W.)
| | - Aleksandra Grudniewska
- Department of Food Chemistry and Biocatalysis, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland; (A.C.); (A.G.); (A.W.)
| | - Agnieszka Wysota
- Department of Food Chemistry and Biocatalysis, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland; (A.C.); (A.G.); (A.W.)
| | - Anna Dunal
- Department of Food Chemistry and Biocatalysis, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland; (A.C.); (A.G.); (A.W.)
- Correspondence: (W.G.); (A.W.); (A.D.); Tel.: +48-71-3205-154 (W.G.); +48-71-3205-461 (A.W.); +48-724-540-245 (A.D.)
| | - Daniel Rubiano Castro
- Facultat de Biologia, Universitat de Barcelona, Avinguda de Diagonal 643, 08007 Barcelona, Spain;
| | - Magdalena Rudzińska
- Faculty of Food Science and Nutrition, Poznań University of Life Sciences, 60-637 Poznań, Poland;
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Pruchnik H, Gliszczyńska A, Włoch A. Evaluation of the Physico-Chemical Properties of Liposomes Assembled from Bioconjugates of Anisic Acid with Phosphatidylcholine. Int J Mol Sci 2021; 22:13146. [PMID: 34884953 PMCID: PMC8658227 DOI: 10.3390/ijms222313146] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Revised: 11/29/2021] [Accepted: 12/02/2021] [Indexed: 12/25/2022] Open
Abstract
The aim of this work was the evaluation of the physico-chemical properties of a new type of liposomes that are composed of DPPC and bioconjugates of anisic acid with phosphatidylcholine. In particular, the impact of modified anisic acid phospholipids on the thermotropic parameters of liposomes was determined, which is crucial for using them as potential carriers of active substances in cancer therapies. Their properties were determined using three biophysical methods, namely differential scanning calorimetry (DSC), steady-state fluorimetry and attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR). Moreover, temperature studies of liposomes composed of DPPC and bioconjugates of anisic acid with phosphatidylcholine provided information about the phase transition, fluidity regarding chain order, hydration and dynamics. The DSC results show that the main phase transition peak for conjugates of anisic acid with phosphatidylcholine molecules was broadened and shifted to a lower temperature in a concentration- and structure-dependent manner. The ATR-FTIR results and the results of measurements conducted using fluorescent probes located at different regions in the lipid bilayer are in line with DSC. The results show that the new bioconjugates with phosphatidylcholine have a significant impact on the physico-chemical properties of a membrane and cause a decrease in the temperature of the main phase transition. The consequence of this is greater fluidity of the lipid bilayer.
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Affiliation(s)
- Hanna Pruchnik
- Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland;
| | - Anna Gliszczyńska
- Department of Chemistry, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland;
| | - Aleksandra Włoch
- Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland;
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Włoch A, Strugała-Danak P, Pruchnik H, Krawczyk-Łebek A, Szczecka K, Janeczko T, Kostrzewa-Susłow E. Interaction of 4'-methylflavonoids with biological membranes, liposomes, and human albumin. Sci Rep 2021; 11:16003. [PMID: 34362978 PMCID: PMC8346624 DOI: 10.1038/s41598-021-95430-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2021] [Accepted: 07/26/2021] [Indexed: 02/07/2023] Open
Abstract
The aim of the study was to compare the impact of three synthesized chemical compounds from a group of methylated flavonoids, i.e. 2'-hydroxy-4-methylchalcone (3), 4'-methylflavanone (4), and 4'-methylflavone (5), on a red blood cell membranes (RBCMs), phosphatidylcholine model membranes (PC), and human serum albumin (HSA) in order to investigate their structure-activity relationships. In the first stage of the study, it was proved that all of the compounds tested do not cause hemolysis of red blood cells and, therefore, do not have a toxic effect. In biophysical studies, it was shown that flavonoids have an impact on the hydrophilic and hydrophobic regions of membranes (both RBCMs and PC) causing an increase in packing order of lipid heads and a decrease in fluidity, respectively. Whereas, on the one hand, the magnitude of these changes depends on the type of the compound tested, on the other hand, it also depends on the type of membrane. 4'-Methylflavanone and 4'-methylflavone are located mainly in the hydrophilic part of lipid membranes, while 2'-hydroxy-4-methylchalcone has a greater impact on the hydrophobic area. A fluorescence quenching study proved that compounds (3), (4) and (5) bind with HSA in a process of static quenching. The binding process is spontaneous whereas hydrogen bonding interactions and van der Waals forces play a major role in the interaction between the compounds and HSA.
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Affiliation(s)
- Aleksandra Włoch
- Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, C. K. Norwida 25, 50-375, Wrocław, Poland
| | - Paulina Strugała-Danak
- Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, C. K. Norwida 25, 50-375, Wrocław, Poland.
| | - Hanna Pruchnik
- Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, C. K. Norwida 25, 50-375, Wrocław, Poland
| | - Agnieszka Krawczyk-Łebek
- Department of Chemistry, Wrocław University of Environmental and Life Sciences, C. K. Norwida 25, 50-375, Wrocław, Poland
| | - Karolina Szczecka
- Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, C. K. Norwida 25, 50-375, Wrocław, Poland
| | - Tomasz Janeczko
- Department of Chemistry, Wrocław University of Environmental and Life Sciences, C. K. Norwida 25, 50-375, Wrocław, Poland
| | - Edyta Kostrzewa-Susłow
- Department of Chemistry, Wrocław University of Environmental and Life Sciences, C. K. Norwida 25, 50-375, Wrocław, Poland
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9
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Włoch A, Stygar D, Bahri F, Bażanów B, Kuropka P, Chełmecka E, Pruchnik H, Gładkowski W. Antiproliferative, Antimicrobial and Antiviral Activity of β-Aryl-δ-iodo-γ-lactones, Their Effect on Cellular Oxidative Stress Markers and Biological Membranes. Biomolecules 2020; 10:biom10121594. [PMID: 33255306 PMCID: PMC7760079 DOI: 10.3390/biom10121594] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 11/18/2020] [Accepted: 11/22/2020] [Indexed: 02/08/2023] Open
Abstract
The aim of this work was the examination of biological activity of three selected racemic cis-β-aryl-δ-iodo-γ-lactones. Tested iodolactones differed in the structure of the aromatic fragment of molecule, bearing isopropyl (1), methyl (2), or no substituent (3) on the para position of the benzene ring. A broad spectrum of biological activity as antimicrobial, antiviral, antitumor, cytotoxic, antioxidant, and hemolytic activity was examined. All iodolactones showed bactericidal activity against Proteus mirabilis, and lactones 1,2 were active against Bacillus cereus. The highest cytotoxic activity towards HeLa and MCF7 cancer cell lines and NHDF normal cell line was found for lactone 1. All assessed lactones significantly disrupted antioxidative/oxidative balance of the NHDF, and the most harmful effect was determined by lactone 1. Contrary to lactone 1, lactones 2 and 3 did not induce the hemolysis of erythrocytes after 48 h of incubation. The differences in activity of iodolactones 1–3 in biological tests may be explained by their different impact on physicochemical properties of membrane as the packing order in the hydrophilic area and fluidity of hydrocarbon chains. This was dependent on the presence and type of alkyl substituent. The highest effect on the membrane organization was observed for lactone 1 due to the presence of bulky isopropyl group on the benzene ring.
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Affiliation(s)
- Aleksandra Włoch
- Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, C.K. Norwida 25, 50-375 Wrocław, Poland;
- Correspondence: (A.W.); (W.G.); Tel.: +48-713205461 (W.G.)
| | - Dominika Stygar
- Department of Physiology in Zabrze, Medical University of Silesia, Poniatowskiego 15, 40-751 Katowice, Poland;
| | - Fouad Bahri
- Laboratory of Microbiology and Plant Biology, University of Mostaganem, Mostaganem 27000, Algeria;
| | - Barbara Bażanów
- Department of Veterinary Microbiology, Wroclaw University of Environmental and Life Sciences, Norwida 31, 50-375 Wrocław, Poland;
| | - Piotr Kuropka
- Department of Biostructure and Animal Physiology, Wrocław University of Environmental and Life Sciences, C.K. Norwida 31, 50-375 Wrocław, Poland;
| | - Elżbieta Chełmecka
- Department of Statistics, Department of Instrumental Analysis, Medical University of Silesia, Ostrogórska 30, 41-200 Sosnowiec, Poland;
| | - Hanna Pruchnik
- Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, C.K. Norwida 25, 50-375 Wrocław, Poland;
| | - Witold Gładkowski
- Department of Chemistry, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland
- Correspondence: (A.W.); (W.G.); Tel.: +48-713205461 (W.G.)
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Mazur M, Włoch A, Bahri F, Pruchnik H, Pawlak A, Obmińska-Mrukowicz B, Maciejewska G, Gładkowski W. Chemoenzymatic Synthesis of Enantiomeric, Bicyclic δ-Halo-γ-lactones with a Cyclohexane Ring, Their Biological Activity and Interaction with Biological Membranes. Biomolecules 2020; 10:biom10010095. [PMID: 31935977 PMCID: PMC7022392 DOI: 10.3390/biom10010095] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Revised: 12/24/2019] [Accepted: 12/28/2019] [Indexed: 02/07/2023] Open
Abstract
Starting from 1-acetyl-1-cyclohexene, three enantiomeric pairs (ee ≥99%) of bicyclic δ-halo-γ-lactones with cyclohexane ring were obtained in five-step synthesis. The key stereochemical steps were lipase-catalyzed kinetic resolution of racemic 1-(cyclohex-1-en-1-yl) ethanol followed by transfer of chirality to ethyl 2-(2-ethylidenecyclohexyl) acetate in the Johnson-Claisen rearrangement. Synthesized halolactones exhibited antiproliferative activity towards canine B-cell leukemia cells (GL-1) and canine B-cell chronic leukemia cells (CLB70) and the most potent (IC50 18.43 ± 1.46 μg/mL against GL-1, IC50 11.40 ± 0.40 μg/mL against CLB70) comparable with the control etoposide, was (1R,6R,1'S)-1-(1'-chloroethyl)-9- oxabicyclo[4.3.0]nonan-8-one (8b). All halolactones did not have a toxic effect on erythrocytes and did not change the fluidity of membranes in the hydrophobic region of the lipid bilayer. Only weak changes in the hydrophilic area were observed, like the degree of lipid packing and associated hydration. The racemic halolactones were also tested for their antimicrobial properties and found to exhibit selectivity towards bacteria, in particular, towards Proteus mirabilis ATCC 35659.
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Affiliation(s)
- Marcelina Mazur
- Department of Chemistry, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland;
- Correspondence: ; Tel.: +48-713205197
| | - Aleksandra Włoch
- Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland; (A.W.); (H.P.)
| | - Fouad Bahri
- Laboratory of Microbiology and Plant Biology, Faculty of Natural and Life Sciences, University of Abd El Hamid Ibn Badiss of Mostaganem, Mostaganem 27000, Algeria;
| | - Hanna Pruchnik
- Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland; (A.W.); (H.P.)
| | - Aleksandra Pawlak
- Department of Pharmacology and Toxicology, Wrocław University of Environmental and Life Sciences, Norwida 31, 50-375 Wrocław, Poland; (A.P.); (B.O.-M.)
| | - Bożena Obmińska-Mrukowicz
- Department of Pharmacology and Toxicology, Wrocław University of Environmental and Life Sciences, Norwida 31, 50-375 Wrocław, Poland; (A.P.); (B.O.-M.)
| | - Gabriela Maciejewska
- Central Laboratory of the Instrumental Analysis, Wrocław University of Science and Technology, Wybrzeże Wyspiańskiego 27, 50-370 Wrocław, Poland;
| | - Witold Gładkowski
- Department of Chemistry, Wrocław University of Environmental and Life Sciences, Norwida 25, 50-375 Wrocław, Poland;
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Henklewska M, Pawlak A, Kutkowska J, Pruchnik H, Rapak A, Obminska-Mrukowicz B. In vitro effects of the activity of novel platinum (II) complex in canine and human cell lines. Vet Comp Oncol 2019; 17:497-506. [PMID: 31111625 DOI: 10.1111/vco.12511] [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: 08/28/2018] [Revised: 05/13/2019] [Accepted: 05/14/2019] [Indexed: 01/04/2023]
Abstract
The anticancer activity of novel platinum derivative, a complex of platinum with tris(2-carboxyethyl)phosphine (Pt-TCEP), has been evaluated in canine (D-17) and human osteosarcoma (U2-OS) cell lines. Viability of cells after incubation for 24 or 72 hours with increasing concentrations (0.625, 1.25, 2.50, 5, 10 and 20 μM) of Pt-TCEP was tested in an MTT assay and compared to effect of cisplatin. Longer-term effect of Pt-TCEP was evaluated in the colony-forming unit assay after 24 hours exposure to the Pt-TCEP (2 and 3 μM) and subsequent incubation for 2 weeks. The influence of the compound on the cell cycle was measured after 24 hours treatment with Pt-TCEP (3 μM). Its pro-apoptotic activity was examined after 24 hours treatment with Pt-TCEP (1.25, 2.50, 5, 10 and 20 μM) using flow cytometry. Expression of main proteins involved in apoptosis was measured after exposure for 24 hours to 3 or 5 μM Pt-TCEP in Western Blot. The compound much more effectively decreased cell viability than cisplatin in case of both cell lines. IC50 of Pt-TCEP was 5.93 ± 0.12 in D-17 and 3.45 ± 0.14 in U2-OS cell lines after 24 hours, and 1.77 ± 0.14 in D-17 and 1.53 ± 0.11 in U2-OS after 72 hours (P < .05). The compound arrested cells in the G2/M phase and inhibited the ability of cells to form colonies. Pt-TCEP induced caspase-dependent apoptosis. The expression of the anti-apoptotic Bcl-XL protein was decreased after Pt-TCEP treatment in both cell lines. The results confirmed anti-cancer activity of Pt-TCEP against canine and human osteosarcoma cell lines.
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Affiliation(s)
- Marta Henklewska
- Department of Pharmacology and Toxicology, Faculty of Veterinary Medicine, Wroclaw University of Environmental and Life Sciences, Wroclaw, Poland
| | - Aleksandra Pawlak
- Department of Pharmacology and Toxicology, Faculty of Veterinary Medicine, Wroclaw University of Environmental and Life Sciences, Wroclaw, Poland
| | - Justyna Kutkowska
- Laboratory of Tumor Molecular Immunobiology, Ludwik Hirszfeld Institute of Immunology and Experimental Therapy Polish Academy of Science, Wroclaw, Poland
| | - Hanna Pruchnik
- Department of Physics and Biophysics, Faculty of Life Sciences and Technology, Wroclaw University of Environmental and Life Sciences, Wroclaw, Poland
| | - Andrzej Rapak
- Laboratory of Tumor Molecular Immunobiology, Ludwik Hirszfeld Institute of Immunology and Experimental Therapy Polish Academy of Science, Wroclaw, Poland
| | - Bozena Obminska-Mrukowicz
- Department of Pharmacology and Toxicology, Faculty of Veterinary Medicine, Wroclaw University of Environmental and Life Sciences, Wroclaw, Poland
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Pruchnik H, Włoch A, Bonarska-Kujawa D, Kleszczyńska H. An In Vitro Study of the Effect of Cytotoxic Triorganotin Dimethylaminophenylazobenzoate Complexes on Red Blood Cells. J Membr Biol 2018; 251:735-745. [PMID: 30350012 PMCID: PMC6244762 DOI: 10.1007/s00232-018-0051-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [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: 03/02/2018] [Accepted: 10/13/2018] [Indexed: 10/31/2022]
Abstract
Interactions of tributyltin (TBTA) and triphenyltin (TPhTA) 2-[4 (dimethylamino)phenylazo]benzoates, showing promising cytostatic activity against tumor cells, with erythrocytes and with erythrocyte membranes and model lipid membranes have been investigated. The effect of TBTA and TPhTA on the erythrocyte and its model membrane was investigated by the microscopic and spectroscopic methods. Interaction of tin complexes with the membrane was determined on the basis of hemolytic activity, changes induced in the shape of erythrocytes, as well as physicochemical parameters of the membrane, such as fluidity. The studies showed that the compounds in higher concentration induce hemolysis; however, TBTA is more toxic than TPhTA. Both TBTA and TPhTA induce morphological alterations in red blood cells-from discocytes to spherocytes and from discocytes to echinocytes. The results suggest that investigated complexes interact with the erythrocyte membrane, change its properties, and probably locate themselves in the hydrophilic part of the membrane, which agrees with conclusions drawn from investigation of erythrocyte membranes and model lipid membranes with the help of fluorescence and infrared spectroscopy.
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Affiliation(s)
- Hanna Pruchnik
- Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, ul. C.K. Norwida 25, 50-375 Wrocław, Poland
| | - Aleksandra Włoch
- Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, ul. C.K. Norwida 25, 50-375 Wrocław, Poland
| | - Dorota Bonarska-Kujawa
- Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, ul. C.K. Norwida 25, 50-375 Wrocław, Poland
| | - Halina Kleszczyńska
- Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, ul. C.K. Norwida 25, 50-375 Wrocław, Poland
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Cyboran-Mikołajczyk S, Żyłka R, Jurkiewicz P, Pruchnik H, Oszmiański J, Hof M, Kleszczyńska H. Interaction of procyanidin B 3 with membrane lipids – Fluorescence, DSC and FTIR studies. Biochimica et Biophysica Acta (BBA) - Biomembranes 2017; 1859:1362-1371. [DOI: 10.1016/j.bbamem.2017.04.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Revised: 04/05/2017] [Accepted: 04/28/2017] [Indexed: 12/22/2022]
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Pruchnik H, Kral T, Hof M. Interaction of Newly Platinum(II) with Tris(2-carboxyethyl)phosphine Complex with DNA and Model Lipid Membrane. J Membr Biol 2017; 250:461-470. [PMID: 28741121 PMCID: PMC5613069 DOI: 10.1007/s00232-017-9972-z] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Accepted: 07/17/2017] [Indexed: 11/30/2022]
Abstract
Structural properties of plasmid DNA and model lipid membrane treated with newly synthesized platinum(II) complex cis-[PtCl2{P(CH2CH2COOH)3}2] (cis-DTCEP for short) were studied and compared with effects of anticancer drug cisplatin, cis-[Pt(NH3)2Cl2] (cis-DDP for short). Time Correlated Single Photon Counting Fluorescence Correlation Spectroscopy (TCSPC-FCS) was employed to study interactions between those platinum complexes and DNA. The TCSPC-FCS results suggest that bonding of cis-DTCEP derivative to DNA leads to plasmid strain realignment towards much more compact structure than in the case of cis-DDP. Application of both differential scanning calorimetry and infrared spectroscopy to platinum complexes/DPPC showed that cis-DTCEP slightly increases the phospholipid’s main phase transition temperature resulting in decreased fluidity of the model membrane. The newly investigated compound—similarly to cis-DDP—interacts mainly with the DPPC head group however not only by the means of electrostatic forces: this compound probably enters into hydrophilic region of the lipid bilayer and forms hydrogen bonds with COO groups of glycerol and PO2− group of DPPC.
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Affiliation(s)
- Hanna Pruchnik
- Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, ul. Norwida 25, 50-375, Wrocław, Poland.
| | - Teresa Kral
- Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, ul. Norwida 25, 50-375, Wrocław, Poland.,J. Heyrovsky Institute of Physical Chemistry of the ASCR, v.v.i., Dolejškova 2155/3, 182 23, Prague 8, Czech Republic
| | - Martin Hof
- J. Heyrovsky Institute of Physical Chemistry of the ASCR, v.v.i., Dolejškova 2155/3, 182 23, Prague 8, Czech Republic
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Henklewska M, Pawlak A, Pruchnik H, Obminska-Mrukowicz B. Complex of Platinum(II) with Tris(2-carboxyethyl)phosphine Induces Apoptosis in Canine Lymphoma/Leukemia Cell Lines. Anticancer Res 2017; 37:539-546. [PMID: 28179299 DOI: 10.21873/anticanres.11346] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Revised: 12/21/2016] [Accepted: 12/28/2016] [Indexed: 11/10/2022]
Abstract
BACKGROUND/AIM Platinum-based drugs are a very potent class of anticancer drugs commonly used in anticancer therapy. However, resistance development and severe adverse effects make further research on new platinum derivatives necessary. In this study, cytotoxic activity of a new platinum(II) compound containing tris(2-carboxyethyl)phosphine (TCEP) ligand cis-[PtCl2(TCEP)2] was tested against canine lymphoma and leukemia cell lines and its activity was compared to that of cisplatin. MATERIALS AND METHODS Cells were exposed for 24 h to increasing concentrations of the studied compounds and cell viability was assessed by propidium iodide staining. Disturbances in apoptosis rate and cell cycle were also examined. RESULTS Cytotoxic activity of the new platinum complex cis-[PtCl2(TCEP)2] was higher compared to that of cisplatin and cell death was associated with apoptosis. However, the tested compound differently affected the cell-cycle progression than cisplatin. CONCLUSION The cis-[PtCl2(TCEP)2] seems to be a potent anticancer agent, although further investigations are necessary to elucidate its biological activity.
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Affiliation(s)
- Marta Henklewska
- Department of Biochemistry, Pharmacology and Toxicology, Wroclaw University of Environmental and Life Sciences, Wroclaw, Poland
| | - Aleksandra Pawlak
- Department of Biochemistry, Pharmacology and Toxicology, Wroclaw University of Environmental and Life Sciences, Wroclaw, Poland
| | - Hanna Pruchnik
- Department of Physics and Biophysics, Faculty of Life Sciences and Technology, Wroclaw University of Environmental and Life Sciences, Wroclaw, Poland
| | - Bozena Obminska-Mrukowicz
- Department of Biochemistry, Pharmacology and Toxicology, Wroclaw University of Environmental and Life Sciences, Wroclaw, Poland
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Pruchnik H, Latocha M, Zielińska A, Pruchnik FP. Rhodium(III) and iridium(III) pentamethylcyclopentadienyl complexes with tris(2-carboxyethyl)phosphine, properties and cytostatic activity. J Organomet Chem 2016. [DOI: 10.1016/j.jorganchem.2016.08.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Pruchnik H, Lis T, Latocha M, Zielińska A, Pruchnik FP. Palladium(II) complexes with tris(2-carboxyethyl)phosphine, structure, reactions and cytostatic activity. J Inorg Biochem 2016; 156:14-21. [DOI: 10.1016/j.jinorgbio.2015.12.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2015] [Revised: 10/25/2015] [Accepted: 12/08/2015] [Indexed: 10/22/2022]
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Cyboran S, Bonarska-Kujawa D, Pruchnik H, Żyłka R, Oszmiański J, Kleszczyńska H. Phenolic content and biological activity of extracts of blackcurrant fruit and leaves. Food Res Int 2014. [DOI: 10.1016/j.foodres.2014.05.037] [Citation(s) in RCA: 21] [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] [Indexed: 12/14/2022]
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Kleszczyńska H, Bielecki K, Sarapuk J, Bonarska-Kujawa D, Pruchnik H, Trela Z, łuczyński J. Biological Activity of New N-Oxides of Tertiary Amines. ACTA ACUST UNITED AC 2014; 61:715-20. [PMID: 17137119 DOI: 10.1515/znc-2006-9-1018] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Potential biological properties of newly synthesized single and double alkyl chain N-oxides of tertiary amines (NTA) were studied. Individual compounds in each of the series had alkyl chains of different length. Various experiments were performed to determine a mechanism of the interaction between NTA and model and biological membranes. These were measurements of hemolytic efficiencies of NTA (pig erythrocytes), their influence on the transition temperatures (DPPC liposomes), on potassium leakage from cucumber, its growth and chlorophyll content (Cucumis sativus cv. Krak F1), and on the resting membrane potential in alga cells (Nitellopsis obtusa).
Also, prevention of erythrocyte membrane lipid oxidation induced by UV irradiation was studied. Potential antioxidative properties of NTA were additionally tested in radical chromogen (ABTS●+) experiments in which antioxidative efficiencies of NTA were compared to that of the standard antioxidant Trolox.
It was found that NTA readily interacted with erythrocyte membranes. Their hemolyzing efficiency increased with the alkyl chain length. Slightly more intensive interaction was found for double alkyl chain compounds. Similar results were obtained in DSC experiments, where incorporation of NTA into liposomal membranes shifted the main transition temperatures and caused a broadening of the main transition peaks depending on the alkyl chain length. Double alkyl chain compounds were also found more efficiently influencing the growth of cucumber. Influence of NTA on the resting membrane potential of algae cells was not quite following the alkyl chain length rule found in erythrocyte and liposome experiments. Also potassium leakage and chlorophyll content determined in physiological experiments were not following the increase of lipophilicity of compounds. Most efficiently influencing those parameters were NTA having shorter alkyl chains, and efficiencies of single alkyl chain compounds were evidently stronger.
Both methods used to test the antioxidative properties of NTA showed that they depended on the alkyl chain lengths of compounds within each series, but double alkyl chain ones exhibited markedly greater efficiency.
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Affiliation(s)
- Halina Kleszczyńska
- Department of Physics and Biophysics, Agricultural University, Norwida 25, 50-375 Wrocław, Poland.
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Kleszczyńska H, Bonarska D, Pruchnik H, Bielecki K, Piasecki A, Luczyński J, Sarapuk J. Antioxidative Activity of New N-Oxides of Tertiary Amines: Membrane Model and Chromogen Studies. ACTA ACUST UNITED AC 2014; 60:567-71. [PMID: 16163830 DOI: 10.1515/znc-2005-7-809] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Potential antioxidative activities of three series of newly synthesized N-oxides were studied. Individual components in each of the series differed in the lipophilicities and number of free radical scavenging groups. Various methods were used to determine their antioxidative efficiencies: Prevention of erythrocyte membrane lipid oxidation induced by UV irradiation and chromogen experiments in which antioxidative efficiencies of compounds were compared to that of the standard antioxidant Trolox (a water-soluble vitamin E analogue). Additionally, some hemolytic (pig erythrocytes) and differential scanning calorimetry (DSC) measurements were performed to determine a mechanism of the interaction between membranes and N-oxides.
It was found that N-oxides, especially those of long alkyl chains (> C12H25), readily interacted with both, erythrocyte and liposomal membranes. No marked differences were found in their protection of erythrocytes against oxidation. In most cases inhibition of oxidation changed between 15% and 25%. Still, it was far better than in chromogen experiments where suppression of free radicals reached 20% in the best case. It may be concluded that antioxidative capabilities of N-oxides are moderate.
Studies on the interaction mechanism showed that incorporation of particular compounds into model membranes varied. Hemolysing activities of compounds increased with the elongation of the alkyl chain but differed for corresponding compounds of particular series indicating that lipophilicity of compounds is not the only factor determing their interaction with erythrocyte membranes.
DSC experiments showed that N-oxides, upon incorporation into 1,2-dipalmitoyl-3-snphosphatidylcholine liposomes, shifted the subtransition (Tp) and the main transition (Tm). The shifts observed depended on the alkyl chain length. The effects differed for each series. It seems that in the case of long alkyl chain compounds the domain formation may take place. Generally, the decrease of Tm was greatest for the same compounds that exhibited the best hemolytic efficacy. The same conclusion concerns the decrease of cooperativity of the main transition and the observed changes suggest an increase in membrane fluidity. Both, erythrocyte and DSC experiments seem to indicate that compounds of particular series incorporate in a somewhat different way into membranes.
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Affiliation(s)
- Halina Kleszczyńska
- Department of Physics and Biophysics, Agricultural University, Norwida 25, 50-375 Wrocław, Poland.
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Rózycka-Roszak B, Przyczyna A, Misiak P, Pruchnik H. The Influence of Cholesterol on the Interaction between N-Dodecyl-N,Ndimethyl- N-benzylammonium Halides and Phosphatidylcholine Bilayers. ACTA ACUST UNITED AC 2014; 61:302-8. [PMID: 16729594 DOI: 10.1515/znc-2006-3-425] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Effects of N-dodecyl-N,N-dimethyl-N-benzylammonium halides (DBeAX) on thermotropic phase behavior of phosphatidylcholine/cholesterol bilayers as well as on 1H NMR spectra were studied. The surfactants were added either to the water phase or directly to the lipid phase (a mixed film was formed). The benzyl group, opposite to liposomes without cholesterol, is not incorporated into the bilayer in the gel state but only in the liquid state. All the halides DBeAX (particularly the chloride DBeAC) showed greater ability to destabilize the membrane structure in the presence than in the absence of cholesterol. The interaction of DBeAX with DPPC/cholesterol bilayers and subsequent changes in the phospholipid bilayer organization depended on the kind of counterion. The strongest effects were observed for chloride (most electronegative ion) and for iodide (largest ion). The effects of chloride and bromide on phase transition and 1H NMR spectra in the presence and absence of cholesterol were opposite. This is discussed in terms of the influence of counterions on the pair cholesterol-DPPC interactions.
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Misiak P, Wilk KA, Kral T, Woźniak E, Pruchnik H, Frąckowiak R, Hof M, Różycka-Roszak B. New gluconamide-type cationic surfactants: Interactions with DNA and lipid membranes. Biophys Chem 2013; 180-181:44-54. [PMID: 23838623 DOI: 10.1016/j.bpc.2013.06.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [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: 03/29/2013] [Revised: 06/04/2013] [Accepted: 06/08/2013] [Indexed: 11/29/2022]
Abstract
New linear cationic surfactants - 2-(alkyldimethylammonio)ethylgluconamide bromides, denoted as CnGAB, n=10, 12, 14 and 16 - were synthesized from natural resources and characterized with respect to their potential as gene-delivery agents in gene therapy applications. Interactions with plasmid DNA and with model membranes were studied both experimentally and theoretically. The compounds with n=12, 14 and 16 show exponentially increasing ability to fully condense DNA. C16GAB condenses DNA at 1:1 surfactant to nucleotide molar ratio. Furthermore, CnGABs interact with model membrane, slightly lowering the temperature of the main phase transition Tm of the DPPC bilayer. C10GAB is found to interact only at the membrane surface. C16GAB reduces Tm less than C12GAB and C14GAB, and forms domains in the bilayer at the surfactant/DPPC molar ratio of 0.1 and higher. The results suggest that C16GAB can be a promising candidate for building gene-delivery carrier systems.
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Affiliation(s)
- Paweł Misiak
- Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, ul. Norwida 25, 50-375 Wrocław, Poland.
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Pruchnik H, Lis T, Latocha M, Zielińska A, Ułaszewski S, Pelińska I, Pruchnik FP. Butyltin(IV) 2-sulfobenzoates: synthesis, structural characterization and their cytostatic and antibacterial activities. J Inorg Biochem 2012; 111:25-32. [PMID: 22484249 DOI: 10.1016/j.jinorgbio.2012.02.024] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2011] [Revised: 02/21/2012] [Accepted: 02/22/2012] [Indexed: 11/16/2022]
Abstract
Three butyltin complexes with 2-sulfobenzoic acid [Sn(C(4)H(9))(2){O(3)SC(6)H(4)COO-2}(H(2)O)]·(C(2)H(5)OH) (1), [Sn(C(4)H(9))(3){O(3)SC(6)H(4)COOH-2}] (2) and [Sn(2)(C(4)H(9))(6){μ-O(3)SC(6)H(4)COO-2}] (3) have been synthesized and characterized by IR and (1)H, (13)C and (119)Sn NMR spectra. They show interesting properties in solid state and solutions because there are many modes of coordination of the Sbz ligand. The structure of complex 1 has been determined by X-ray crystallography. It is a chain compound with 2-sulfonatobenzoate coordinated to Sn atoms as a bridging and chelate ligand via O atoms of COO and SO(3) groups. In solutions the chains dissociate giving mainly mononuclear complexes. The NMR spectra and calculation at the DFT B3LYP/3-21G** level indicate that in solutions of compounds 1, 2 and 3 in polar solvents, many complexes showing dynamic properties are formed. Density functional theory (DFT) calculations showed that many five- and six-coordinate isomers and conformers can exist in equilibrium. All compounds effectively interact with AMP and ATP. The NMR spectra showed that nucleotides are coordinated to Sn atoms via PO(4) groups. The complexes are very active cytostatic agents against tumor strains. They are more effective than cisplatin. It is interesting that activity of 3 against non-tumor cell NHDF is lower than against tumor cells. Antibacterial activity of 1 and 2 has been investigated. Compound 2 is a very effective agent against Gram-positive bacteria. Antibacterial activity of 1 is lower than that of 2. Activity of 1 both against Gram-positive and Gram-negative bacteria is similar.
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Affiliation(s)
- Hanna Pruchnik
- Department of Physics and Biophysics, Wroclaw University of Environmental and Life Sciences, ul. Norwida 25, Wrocław, Poland.
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Dylag M, Pruchnik H, Pruchnik F, Majkowska-Skrobek G, Ułaszewski S. Antifungal activity of organotin compounds with functionalized carboxylates evaluated by the microdilution bioassay in vitro. Med Mycol 2010; 48:373-83. [PMID: 19688632 DOI: 10.1080/13693780903188680] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
Abstract
We investigated the susceptibility of 96 well-characterized strains of yeast-like and filamentous fungi towards new organotin compounds: (1) [Sn(C4H9)3(OOCC6H4SO3H-2)], (2) Sn(C4H9)3{OOC(CH2)3P(C6H5)3}]Br, and (3) [Sn(C6H5)3[OOC(CH2)3N(CH3)3}]Cl. In the case of yeast-like fungi, the in vitro susceptibility tests were carried out according to the Clinical Laboratory Standards Institute (CLSI, formerly NCCLS) reference method M27-A2, while for filamentous fungi the investigations were conducted according to the M38-A and M38-P methods. The organotin complexes 1, 2 and 3 are active antifungal agents. Minimal inhibitory concentrations (MIC) were in the range of 0.25-4.68 microg/ml for all tested fungal strains. Considerably larger differences were found for minimal fungicidal concentrations (MFC). In the case of yeast-like fungi, the fungicidal effect was generally observed at organotin compounds concentrations of 2.34-9.37 microg/ml. The MFC values for filamentous fungi were considerably higher and were in the range of 18.74-50 microg/ml. In conclusion, organotin compounds 1, 2 and 3 showed high fungistatic and fungicidal activities against different species of pathogenic and nonpathogenic fungi. However, they were also highly cytotoxic towards two mammalian cell lines.
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Affiliation(s)
- Mariusz Dylag
- Institute of Genetics and Microbiology, University of Wroclaw, Wroclaw, Poland.
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Dyląg M, Pruchnik H, Pruchnik F, Majkowska-Skrobek G, Ułaszewski S. Antifungal activity of organotin compounds with functionalized carboxylates evaluated by the microdilution bioassayin vitro. Med Mycol 2010. [DOI: 10.3109/13693780903188680] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Fisicaro E, Compari C, Biemmi M, Duce E, Peroni M, Donofrio G, Sansone F, Różycka-Roszak B, Pruchnik H, Barbero N, Viscardi G, Quagliotto P. Thermodynamics and Biological Properties of the Aqueous Solutions of New Glucocationic Surfactants. J Phys Chem B 2008; 112:9360-70. [DOI: 10.1021/jp800470a] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Emilia Fisicaro
- Dipartimento di Scienze Farmacologiche, Biologiche e Chimiche Applicate, Università di Parma, Viale G.P. Usberti, 27/A - 43100 Parma, Italy, Dipartimento di Salute Animale, sezione di Malattie Infettive degli Animali, Università di Parma, Via del Taglio, 8 - 43100 Parma, Italy, Dipartimento di Chimica Organica e Industriale, Università di Parma, Viale G.P. Usberti, 17/A - 43100 Parma, Italy, Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, Norwida 25, 50 - 375
| | - Carlotta Compari
- Dipartimento di Scienze Farmacologiche, Biologiche e Chimiche Applicate, Università di Parma, Viale G.P. Usberti, 27/A - 43100 Parma, Italy, Dipartimento di Salute Animale, sezione di Malattie Infettive degli Animali, Università di Parma, Via del Taglio, 8 - 43100 Parma, Italy, Dipartimento di Chimica Organica e Industriale, Università di Parma, Viale G.P. Usberti, 17/A - 43100 Parma, Italy, Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, Norwida 25, 50 - 375
| | - Mariano Biemmi
- Dipartimento di Scienze Farmacologiche, Biologiche e Chimiche Applicate, Università di Parma, Viale G.P. Usberti, 27/A - 43100 Parma, Italy, Dipartimento di Salute Animale, sezione di Malattie Infettive degli Animali, Università di Parma, Via del Taglio, 8 - 43100 Parma, Italy, Dipartimento di Chimica Organica e Industriale, Università di Parma, Viale G.P. Usberti, 17/A - 43100 Parma, Italy, Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, Norwida 25, 50 - 375
| | - Elenia Duce
- Dipartimento di Scienze Farmacologiche, Biologiche e Chimiche Applicate, Università di Parma, Viale G.P. Usberti, 27/A - 43100 Parma, Italy, Dipartimento di Salute Animale, sezione di Malattie Infettive degli Animali, Università di Parma, Via del Taglio, 8 - 43100 Parma, Italy, Dipartimento di Chimica Organica e Industriale, Università di Parma, Viale G.P. Usberti, 17/A - 43100 Parma, Italy, Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, Norwida 25, 50 - 375
| | - Monica Peroni
- Dipartimento di Scienze Farmacologiche, Biologiche e Chimiche Applicate, Università di Parma, Viale G.P. Usberti, 27/A - 43100 Parma, Italy, Dipartimento di Salute Animale, sezione di Malattie Infettive degli Animali, Università di Parma, Via del Taglio, 8 - 43100 Parma, Italy, Dipartimento di Chimica Organica e Industriale, Università di Parma, Viale G.P. Usberti, 17/A - 43100 Parma, Italy, Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, Norwida 25, 50 - 375
| | - Gaetano Donofrio
- Dipartimento di Scienze Farmacologiche, Biologiche e Chimiche Applicate, Università di Parma, Viale G.P. Usberti, 27/A - 43100 Parma, Italy, Dipartimento di Salute Animale, sezione di Malattie Infettive degli Animali, Università di Parma, Via del Taglio, 8 - 43100 Parma, Italy, Dipartimento di Chimica Organica e Industriale, Università di Parma, Viale G.P. Usberti, 17/A - 43100 Parma, Italy, Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, Norwida 25, 50 - 375
| | - Francesco Sansone
- Dipartimento di Scienze Farmacologiche, Biologiche e Chimiche Applicate, Università di Parma, Viale G.P. Usberti, 27/A - 43100 Parma, Italy, Dipartimento di Salute Animale, sezione di Malattie Infettive degli Animali, Università di Parma, Via del Taglio, 8 - 43100 Parma, Italy, Dipartimento di Chimica Organica e Industriale, Università di Parma, Viale G.P. Usberti, 17/A - 43100 Parma, Italy, Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, Norwida 25, 50 - 375
| | - Bożenna Różycka-Roszak
- Dipartimento di Scienze Farmacologiche, Biologiche e Chimiche Applicate, Università di Parma, Viale G.P. Usberti, 27/A - 43100 Parma, Italy, Dipartimento di Salute Animale, sezione di Malattie Infettive degli Animali, Università di Parma, Via del Taglio, 8 - 43100 Parma, Italy, Dipartimento di Chimica Organica e Industriale, Università di Parma, Viale G.P. Usberti, 17/A - 43100 Parma, Italy, Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, Norwida 25, 50 - 375
| | - Hanna Pruchnik
- Dipartimento di Scienze Farmacologiche, Biologiche e Chimiche Applicate, Università di Parma, Viale G.P. Usberti, 27/A - 43100 Parma, Italy, Dipartimento di Salute Animale, sezione di Malattie Infettive degli Animali, Università di Parma, Via del Taglio, 8 - 43100 Parma, Italy, Dipartimento di Chimica Organica e Industriale, Università di Parma, Viale G.P. Usberti, 17/A - 43100 Parma, Italy, Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, Norwida 25, 50 - 375
| | - Nadia Barbero
- Dipartimento di Scienze Farmacologiche, Biologiche e Chimiche Applicate, Università di Parma, Viale G.P. Usberti, 27/A - 43100 Parma, Italy, Dipartimento di Salute Animale, sezione di Malattie Infettive degli Animali, Università di Parma, Via del Taglio, 8 - 43100 Parma, Italy, Dipartimento di Chimica Organica e Industriale, Università di Parma, Viale G.P. Usberti, 17/A - 43100 Parma, Italy, Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, Norwida 25, 50 - 375
| | - Guido Viscardi
- Dipartimento di Scienze Farmacologiche, Biologiche e Chimiche Applicate, Università di Parma, Viale G.P. Usberti, 27/A - 43100 Parma, Italy, Dipartimento di Salute Animale, sezione di Malattie Infettive degli Animali, Università di Parma, Via del Taglio, 8 - 43100 Parma, Italy, Dipartimento di Chimica Organica e Industriale, Università di Parma, Viale G.P. Usberti, 17/A - 43100 Parma, Italy, Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, Norwida 25, 50 - 375
| | - Pierluigi Quagliotto
- Dipartimento di Scienze Farmacologiche, Biologiche e Chimiche Applicate, Università di Parma, Viale G.P. Usberti, 27/A - 43100 Parma, Italy, Dipartimento di Salute Animale, sezione di Malattie Infettive degli Animali, Università di Parma, Via del Taglio, 8 - 43100 Parma, Italy, Dipartimento di Chimica Organica e Industriale, Università di Parma, Viale G.P. Usberti, 17/A - 43100 Parma, Italy, Department of Physics and Biophysics, Wrocław University of Environmental and Life Sciences, Norwida 25, 50 - 375
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Pruchnik FP, Pruchnik H, Ostropolska Ł, Ciunik LZ. Tris(2-cyanoethyl)tin(IV) bromide and tris(2-cyanoethyl)tin(IV) iodide, their structure, properties and reactions with adenosine, AMP and ATP. Polyhedron 2008. [DOI: 10.1016/j.poly.2007.12.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Rózycka-Roszak B, Pruchnik H. Influence of dodecyltrimethylammonium halides on interaction of phenyltin compounds with model membranes. Z NATURFORSCH C 2001; 56:623-8. [PMID: 11531099 DOI: 10.1515/znc-2001-7-823] [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] [Indexed: 11/15/2022]
Abstract
The effects were studied of dodecyltrimethylammonium chloride (DTAC), dodecyltrimethylammonium bromide (DTAB) and dodecyltrimethylammonium iodide (DTAI) on thermotropic phase behaviour of phosphatidylcholine bilayers, as well as on 1H NMR and 31P NMR spectra, in the presence of diphenyltin dichloride (DPhT) and triphenyltin chloride (TPhT). The obtained results indicate that in the presence of the surfactant studied the interaction of phenyltin compounds with model membranes was changed and the changes depended on the kind of the counterion. The surfactants studied (especially DTAC) decrease the ability of phenyltin compounds to induce structural changes in the bilayer. It is suggested that DTAB, and especially DTAC, prevent DPhT induced interdigitated phase formation as well as formation of an inverted hexagonal phase (H(II)) in the case of TPhT/DPPC liposomes.
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Affiliation(s)
- B Rózycka-Roszak
- Agricultural University, Department of Physics and Biophysics, Wrocław, Poland.
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R�?ycka-Roszak B, Pruchnik H. The effect of phenyltin chlorides on the phase polymorphism of dipalmitoylphosphatidylcholine. Appl Organomet Chem 2001. [DOI: 10.1002/aoc.147] [Citation(s) in RCA: 2] [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: 11/09/2022]
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Rózycka-Roszak B, Pruchnik H. Influence of dodecyltrimethylammonium halides on thermotropic phase behaviour of phosphatidylcholine/cholesterol bilayers. Z NATURFORSCH C 2000; 55:753-7. [PMID: 11098826 DOI: 10.1515/znc-2000-9-1013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Effects of dodecyltrimethylammonium chloride (DTAC), dodecyltrimethylammonium bromide (DTAB) and dodecyltrimethylammonium iodide (DTAI) on thermotropic phase behaviour of phosphatidylcholine bilayers containing cholesterol as well as on 1H NMR spectra were studied. Two series of experiments were performed. In the first one the surfactants were added to the water phase while in the other directly to the lipid phase (a mixed film from cholesterol, surfactant and phosphatidylcholine was formed). The effects of particular surfactants on the main phase transition temperature, Tm, were more pronounced when added to the lipid phase (2nd method) than to the water phase (1st method); the opposite happened when cholesterol was absent (Rózycka-Roszak and Pruchnik 2000, Z. Naturforsch. 55c, 240-244). Furthermore, in the case of the first method the transitions were asymmetrical while in the second method nearly symmetrical. It is suggested that surfactant poor and surfactant rich domains are formed when surfactants are added to the water phase.
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Affiliation(s)
- B Rózycka-Roszak
- Agricultural University, Department of Physics and Biophysics, Wrocław, Poland.
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Langner M, Pruchnik H, Kubica K. The effect of the lipid bilayer state on fluorescence intensity of fluorescein-PE in a saturated lipid bilayer. Z NATURFORSCH C 2000; 55:418-24. [PMID: 10928554 DOI: 10.1515/znc-2000-5-618] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Fluorescein-PE is a fluorescence probe that is used as a membrane label or a sensor of surface associated processes. Fluorescein-PE fluorescence intensity depends not only on bulk pH, but also on the local electrostatic potential, which affects the local membrane interface proton concentration. The pH sensitivity and hydrophilic character of the fluorescein moiety was used to detect conformational changes at the lipid bilayer surface. When located in the dipalmitoylphosphatidylcholine (DPPC) bilayer, probe fluorescence depends on conformational changes that occur during phase transitions. Relative fluorescence intensity changes more at pretransition than at the main phase transition temperature, indicating that interface conformation affects the condition in the vicinity of the membrane. Local electrostatic potential depends on surface charge density, the local dielectric constant, salt concentration and water organisation. Initial increase in fluorescence intensity at temperatures preceding that of pretransition can be explained by the decreased value of the dielectric constant in the lipid polar headgroups region related in turn to decreased water organisation within the membrane interface. The abrupt decrease in fluorescence intensity at temperatures between 25 degrees C and 35 degrees C (DPPC pretransition) is likely to be caused by an increased value of the electrostatic potential, induced by an elevated value of the dielectric constant within the phosphate group region. Further increase in the fluorescence intensity at temperatures above that of the gel-liquid phase transition correlates with the calculated decreased surface electrostatic potential. Above the main phase transition temperature, fluorescence intensity increase at a salt concentration of 140 mM is larger than with 14 mM. This results from a sharp decline of the electrostatic potential induced by the phosphocholine dipole as a function of distance from the membrane surface.
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Affiliation(s)
- M Langner
- Institute of Physics, Wrocław University of Technology, Poland
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Rózycka-Roszak B, Pruchnik H. Effect of counterions on the influence of dodecyltrimethylammonium halides on thermotropic phase behaviour of phosphatidylcholine bilayers. Z NATURFORSCH C 2000; 55:240-4. [PMID: 10817214 DOI: 10.1515/znc-2000-3-416] [Citation(s) in RCA: 7] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Effects of dodecyltrimethylammonium chloride (DTAC), dodecyltrimethylammonium bromide (DTAB) and dodecyltrimethylammonium iodide (DTAI) on thermotropic phase behaviour of phosphatidylcholine bilayers as well as on 1H NMR spectra were studied. In order to enhance the effect of counterions on water structure two series of experiments were performed. In the first one the surfactants were added to the water phase and in the other one directly to lipid phase (a mixed film was formed). The effects of particular surfactants on the main phase-transition temperature were more pronounced when they were added to the water phase (1st method) instead of the lipid phase (2nd method). Furthermore, in the case of the first method the transitions were found asymmetrical while in the second method nearly symmetrical. It is suggested that surfactant-poor and surfactant-rich domains are formed when surfactants are added to the water phase.
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Affiliation(s)
- B Rózycka-Roszak
- Agricultural University, Department of Physics and Biophysics, Wrocław, Poland.
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Abstract
The effect of cations on the kinetics of hemolysis caused by organotin compounds was studied. The ions used in the investigation diminish or totally inhibit hemolysis of red cells induced by organotin compounds. The degree of inhibition depends both on the kind of ion and the compounds that induce hemolysis. The ions Zn2+, Co2+, and Cd2+ present in the medium at 50 microM concentration totally protect the erythrocytes against hemolysis induced by the compound (C3H7)3SnCl. The study has also shown the monovalent ions K+ and trimethyldodecylammonium bromide are less potent inhibitors of hemolysis than divalent ions, which is not the case for two non-ionic organotin compounds only. The studies performed indicate that hemolysis induced by organotin compounds is inhibited due to electrostatic interaction between the cations selected and erythrocyte membrane.
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Affiliation(s)
- H Kleszczyńska
- Department of Physics and Biophysics, Agricultural University, Wrocław, Poland
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Kleszcyńska H, Hładyszowski J, Pruchnik H, Przestalski S. Erythrocyte hemolysis by organic tin and lead compounds. Z NATURFORSCH C 1997; 52:65-9. [PMID: 9090068] [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: 02/04/2023]
Abstract
The effect of trialkyllead and trialkyltin on pig erythrocyte hemolysis has been studied and compared. The results of experiments showed that the hemolytic activity of organoleads increases with their hydrophobicity and follows the sequence: triethyllead chloride < tri-n-propyllead chloride < tributyllead chloride. And similarly in the case of organotins: triethyltin chloride < tri-n-propyltin chloride < tributyltin chloride. Comparison of the hemolytic activity of organoleads and organotins indicates that the lead compounds exhibit higher hemolytic activity. The methods of quantum chemistry allowed to determine the maximum electric potential of the ions R3Pb+ and R3Sn+, and suggest a relationship between the potential and toxicity.
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Affiliation(s)
- H Kleszcyńska
- Department of Physics and Biophysics, Agricultural University, Wrocław, Poland
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