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Chromone-Containing Allylmorpholines Influence Ion Channels in Lipid Membranes via Dipole Potential and Packing Stress. Int J Mol Sci 2022; 23:ijms231911554. [PMID: 36232854 PMCID: PMC9570167 DOI: 10.3390/ijms231911554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2022] [Revised: 09/23/2022] [Accepted: 09/27/2022] [Indexed: 11/17/2022] Open
Abstract
Herein, we report that chromone-containing allylmorpholines can affect ion channels formed by pore-forming antibiotics in model lipid membranes, which correlates with their ability to influence membrane boundary potential and lipid-packing stress. At 100 µg/mL, allylmorpholines 1, 6, 7, and 8 decrease the boundary potential of the bilayers composed of palmitoyloleoylphosphocholine (POPC) by about 100 mV. At the same time, the compounds do not affect the zeta-potential of POPC liposomes, but reduce the membrane dipole potential by 80-120 mV. The allylmorpholine-induced drop in the dipole potential produce 10-30% enhancement in the conductance of gramicidin A channels. Chromone-containing allylmorpholines also affect the thermotropic behavior of dipalmytoylphosphocholine (DPPC), abolishing the pretransition, lowering melting cooperativity, and turning the main phase transition peak into a multicomponent profile. Compounds 4, 6, 7, and 8 are able to decrease DPPC's melting temperature by about 0.5-1.9 °C. Moreover, derivative 7 is shown to increase the temperature of transition of palmitoyloleoylphosphoethanolamine from lamellar to inverted hexagonal phase. The effects on lipid-phase transitions are attributed to the changes in the spontaneous curvature stress. Alterations in lipid packing induced by allylmorpholines are believed to potentiate the pore-forming ability of amphotericin B and gramicidin A by several times.
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Efimova SS, Ostroumova OS. The Disordering Effect of Plant Metabolites on Model Lipid Membranes of Various Thickness. ACTA ACUST UNITED AC 2020. [DOI: 10.1134/s1990519x2005003x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Efimova SS, Zakharova AA, Ostroumova OS. Alkaloids Modulate the Functioning of Ion Channels Produced by Antimicrobial Agents via an Influence on the Lipid Host. Front Cell Dev Biol 2020; 8:537. [PMID: 32695785 PMCID: PMC7339123 DOI: 10.3389/fcell.2020.00537] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Accepted: 06/08/2020] [Indexed: 12/22/2022] Open
Abstract
It is widely recognized that an alteration in membrane physical properties induced by the adsorption of various drugs and biologically active compounds might greatly affect the functioning of peptides and proteins embedded in the membrane, in particular various ion channels. This study aimed to obtain deep insight into the diversity of the molecular mechanisms of membrane action of one of the most numerous and extremely important class of phytochemicals, the alkaloids. Protoalkaloids (derivatives of β-phenylethylamine, benzylamines, and colchicines), heterocyclic alkaloids (derivatives of purine, quinolysidine, piperidine, pyridine, quinoline, and isoquinoline), and steroid alkaloids were tested. We evaluated the effects of 22 compounds on lipid packing by investigating the thermotropic behavior of membrane lipids and the leakage of a fluorescent marker from unilamellar lipid vesicles. The alteration in the transmembrane distribution of the electrical potential was estimated by measuring the alkaloid induced changes in the boundary potential of planar lipid bilayers. We found that benzylamines, the chili pepper active components, capsaicin and dihydrocapsaicin, strongly affect not only the elastic properties of the lipid host, but also its electrostatics by dramatic decrease in membrane dipole potential. We concluded that the increase in the conductance and lifetime of gramicidin A channels induced by benzylamines was related to alteration in membrane dipole potential not to decrease in membrane stiffness. A sharp decrease in the lifetime of single ion pores induced by the antifungal lipopeptide syringomycin E, after addition of benzylamines and black pepper alkaloid piperine, was also mainly due to the reduction in dipole potential. At the same time, we showed that the disordering of membrane lipids in the presence of benzylamines and piperine plays a decisive role in the regulation of the conductance induced by the antifungal polyene macrolide antibiotic nystatin, while the inhibition of steady-state transmembrane current produced by the antimicrobial peptide cecropin A was attributed to both the dipole potential drop and membrane lipid disordering in the presence of pepper alkaloids. These data might lead to a better understanding of the biological activity of alkaloids, especially their action on voltage-gated and mechanosensitive ion channels in cell membranes.
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Affiliation(s)
- Svetlana S Efimova
- Laboratory of Membrane and Ion Channel Modeling, Institute of Cytology, Russian Academy of Sciences, St. Petersburg, Russia
| | - Anastasiia A Zakharova
- Laboratory of Membrane and Ion Channel Modeling, Institute of Cytology, Russian Academy of Sciences, St. Petersburg, Russia
| | - Olga S Ostroumova
- Laboratory of Membrane and Ion Channel Modeling, Institute of Cytology, Russian Academy of Sciences, St. Petersburg, Russia
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Fengycin induces ion channels in lipid bilayers mimicking target fungal cell membranes. Sci Rep 2019; 9:16034. [PMID: 31690786 PMCID: PMC6831686 DOI: 10.1038/s41598-019-52551-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Accepted: 10/18/2019] [Indexed: 12/28/2022] Open
Abstract
The one-sided addition of fengycin (FE) to planar lipid bilayers mimicking target fungal cell membranes up to 0.1 to 0.5 μM in the membrane bathing solution leads to the formation of well-defined and well-reproducible single-ion channels of various conductances in the picosiemens range. FE channels were characterized by asymmetric conductance-voltage characteristic. Membranes treated with FE showed nonideal cationic selectivity in potassium chloride bathing solutions. The membrane conductance induced by FE increased with the second power of the lipopeptide aqueous concentration, suggesting that at least FE dimers are involved in the formation of conductive subunits. The pore formation ability of FE was not distinctly affected by the molecular shape of membrane lipids but strongly depended on the presence of negatively charged species in the bilayer. FE channels were characterized by weakly pronounced voltage gating. Small molecules known to modify the transmembrane distribution of electrical potential and the lateral pressure profile were used to modulate the channel-forming activity of FE. The observed effects of membrane modifiers were attributed to changes in lipid packing and lipopeptide oligomerization in the membrane.
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Zakharova AA, Efimova SS, Schagina LV, Malev VV, Ostroumova OS. Blocking ion channels induced by antifungal lipopeptide syringomycin E with amide-linked local anesthetics. Sci Rep 2018; 8:11543. [PMID: 30069037 PMCID: PMC6070474 DOI: 10.1038/s41598-018-30077-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Accepted: 07/24/2018] [Indexed: 11/22/2022] Open
Abstract
The effects of the amide-linked (lidocaine (LDC), mepivacaine (MPV), prilocaine (PLC)) and ester-bound local anesthetics (benzocaine (BZC), procaine (PRC), and tetracaine (TTC)) on the pore-forming activity of the antifungal lipopeptide syringomycin E (SRE) in lipid bilayers were studied. Independently on electrolyte concentration in the membrane bathing solution the observed changes in conductance of SRE channels agreed with the altered membrane dipole potential under the action of ester-bound local anesthetics. Effects of aminoamides in diluted and concentrated solutions were completely different. At 0.1 M KCl (pH 7.4) the effects of amide-linked anesthetics were in accordance with changes in the membrane surface potential, while at 2 M KCl aminoamides blocked ion passage through the SRE channels, leading to sharp reductions in pore conductance at negative voltages and 100-fold decreases in the channel lifetimes. The effects were not practically influenced by the membrane lipid composition. The interaction cooperativity implied the existence of specific binding sites for amide-bound anesthetics in SRE channels.
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Affiliation(s)
- Anastasiia A Zakharova
- Institute of Cytology of the Russian Academy of Sciences, 4 Tikhoretsky prospect, St. Petersburg, 194064, Russia
| | - Svetlana S Efimova
- Institute of Cytology of the Russian Academy of Sciences, 4 Tikhoretsky prospect, St. Petersburg, 194064, Russia
| | - Ludmila V Schagina
- Institute of Cytology of the Russian Academy of Sciences, 4 Tikhoretsky prospect, St. Petersburg, 194064, Russia
| | - Valery V Malev
- Institute of Cytology of the Russian Academy of Sciences, 4 Tikhoretsky prospect, St. Petersburg, 194064, Russia.,Saint Petersburg State University, Institute of Chemistry, 26 Universitetskii prospect, St. Petersburg, Petergof, 198504, Russia
| | - Olga S Ostroumova
- Institute of Cytology of the Russian Academy of Sciences, 4 Tikhoretsky prospect, St. Petersburg, 194064, Russia.
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Ciuca A, Asandei A, Schiopu I, Apetrei A, Mereuta L, Seo CH, Park Y, Luchian T. Single-Molecule, Real-Time Dissecting of Peptide Nucleic Acid-DNA Duplexes with a Protein Nanopore Tweezer. Anal Chem 2018; 90:7682-7690. [PMID: 29799733 DOI: 10.1021/acs.analchem.8b01568] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Peptide nucleic acids (PNAs) are artificial, oligonucleotides analogues, where the sugar-phosphate backbone has been substituted with a peptide-like N-(2-aminoethyl)glycine backbone. Because of their inherent benefits, such as increased stability and enhanced binding affinity toward DNA or RNA substrates, PNAs are intensively studied and considered beneficial for the fields of materials and nanotechnology science. Herein, we designed cationic polypeptide-functionalized, 10-mer PNAs, and demonstrated the feasible detection of hybridization with short, complementary DNA substrates, following analytes interaction with the vestibule entry of an α-hemolysin (α-HL) nanopore. The opposite charged state at the polypeptide-functionalized PNA-DNA duplex extremities, facilitated unzipping of a captured duplex at the lumen entry of a voltage-biased nanopore, followed by monomers threading. These processes were resolvable and identifiable in real-time, from the temporal profile of the ionic current through a nanopore accompanying conformational changes of a single PNA-DNA duplex inside the α-HL nanopore. By employing a kinetic description within the discrete Markov chains theory, we proposed a minimalist kinetic model to successfully describe the electric force-induced strand separation in the duplex. The distinct interactions of the duplex at either end of the nanopore present powerful opportunities for introducing new generations of force-spectroscopy nanopore-based platforms, enabling from the same experiment duplex detection and assessment of interstrand base pairing energy.
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Affiliation(s)
- Andrei Ciuca
- Department of Physics , Alexandru I. Cuza University , Iasi 700506 , Romania
| | - Alina Asandei
- Interdisciplinary Research Department , Alexandru I. Cuza University , Iasi 700506 , Romania
| | - Irina Schiopu
- Interdisciplinary Research Department , Alexandru I. Cuza University , Iasi 700506 , Romania
| | - Aurelia Apetrei
- Department of Physics , Alexandru I. Cuza University , Iasi 700506 , Romania
| | - Loredana Mereuta
- Department of Physics , Alexandru I. Cuza University , Iasi 700506 , Romania
| | - Chang Ho Seo
- Department of Bioinformatics , Kongju National University , Kongju 32588 , South Korea
| | - Yoonkyung Park
- Department of Biomedical Science and Research Center for Proteinaceous Materials (RCPM) , Chosun University , Gwangju 61452 , South Korea
| | - Tudor Luchian
- Department of Physics , Alexandru I. Cuza University , Iasi 700506 , Romania
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Delpuech JJ, Dupont-Leclercq L, Parant S, Henry B. NMR Evidence for Grotthuss-like Proton Diffusion on the Surface of N-Alkyl-ammonium Micelles in Acidic Aqueous Solution. J SOLUTION CHEM 2017. [DOI: 10.1007/s10953-017-0672-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Two types of syringomycin E channels in sphingomyelin-containing bilayers. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2015; 45:91-8. [DOI: 10.1007/s00249-015-1101-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2015] [Revised: 10/19/2015] [Accepted: 11/11/2015] [Indexed: 10/22/2022]
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Efimova SS, Zakharov VV, Ostroumova OS. Effects of dipole modifiers on channel-forming activity of amyloid and amyloid-like peptides in lipid bilayers. ACTA ACUST UNITED AC 2015. [DOI: 10.1134/s1990519x15030049] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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The interaction of dipole modifiers with amphotericin-ergosterol complexes. Effects of phospholipid and sphingolipid membrane composition. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2014; 43:207-15. [DOI: 10.1007/s00249-014-0946-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/07/2013] [Revised: 01/30/2014] [Accepted: 02/05/2014] [Indexed: 10/25/2022]
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Asandei A, Apetrei A, Luchian T. Uni-molecular detection and quantification of selected β-lactam antibiotics with a hybrid α-hemolysin protein pore. J Mol Recognit 2011; 24:199-207. [DOI: 10.1002/jmr.1038] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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The ionization state of D37 in E. coli porin OmpF and the nature of conductance fluctuations in D37 mutants. EUROPEAN BIOPHYSICS JOURNAL: EBJ 2010; 39:1563-71. [DOI: 10.1007/s00249-010-0613-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2010] [Revised: 05/10/2010] [Accepted: 05/12/2010] [Indexed: 10/19/2022]
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Apetrei A, Asandei A, Park Y, Hahm KS, Winterhalter M, Luchian T. Unimolecular study of the interaction between the outer membrane protein OmpF from E. coli and an analogue of the HP(2–20) antimicrobial peptide. J Bioenerg Biomembr 2010; 42:173-80. [DOI: 10.1007/s10863-010-9273-z] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2009] [Accepted: 02/03/2010] [Indexed: 10/19/2022]
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López ML, Aguilella-Arzo M, Aguilella VM, Alcaraz A. Ion Selectivity of a Biological Channel at High Concentration Ratio: Insights on Small Ion Diffusion and Binding. J Phys Chem B 2009; 113:8745-51. [DOI: 10.1021/jp902267g] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- M. Lidón López
- Department of Physics, Laboratory of Molecular Biophysics, University Jaume I, Av. Sos Baynat, s/n, 12080 Castellón, Spain
| | - Marcel Aguilella-Arzo
- Department of Physics, Laboratory of Molecular Biophysics, University Jaume I, Av. Sos Baynat, s/n, 12080 Castellón, Spain
| | - Vicente M. Aguilella
- Department of Physics, Laboratory of Molecular Biophysics, University Jaume I, Av. Sos Baynat, s/n, 12080 Castellón, Spain
| | - Antonio Alcaraz
- Department of Physics, Laboratory of Molecular Biophysics, University Jaume I, Av. Sos Baynat, s/n, 12080 Castellón, Spain
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Mahdiuni H, Mobasheri H, Shafiee A, Foroumadi A. Effects of novel antituberculosis agents on OmpF channel activity. Biochem Biophys Res Commun 2008; 376:174-9. [PMID: 18762173 DOI: 10.1016/j.bbrc.2008.08.113] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2008] [Accepted: 08/23/2008] [Indexed: 11/18/2022]
Abstract
Nanopore forming proteins spanning the outer membrane mediate in the diffusion of hydrophilic chemicals through the hydrophobic bacterial cell wall. In this study, the effects of two novel anti-TB derivatives, ethyl alpha-[5-(5-nitro-2-thienyl)-1,3,4-thiadiazole-2-ylthio] acetates and propyl alpha-[5-(5-nitro-2-thienyl)-1,3,4-thiadiazole-2-ylthio] acetates, on OmpF channel reconstituted in artificial bilayers were evaluated by voltage clamp technique. Surprisingly, ethyl derivative (MIC > or = 6.75 microg/ml) showed no effects on OmpF channel activity but the propyl derivative (MIC=0.39 microg/ml) reduced the channel conductance considerably and changed the gating pattern of the channel. The findings obtained here at molecular level, might shed light on better understanding of the actual mechanism(s) by which the novel anti-TB agents permeate through the cell wall of the Mycobacterium tuberculosis.
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Affiliation(s)
- H Mahdiuni
- Laboratory of Membrane Biophysics, Institute of Biochemistry and Biophysics, University of Tehran, P.O. Box 1384-13145, Tehran, Iran
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