1
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Villarón D, Bos JE, Kohl F, Mommer S, de Jong J, Wezenberg SJ. Photoswitchable Bis(amidopyrroles): Modulating Anion Transport Activity Independent of Binding Affinity. J Org Chem 2023; 88:11328-11334. [PMID: 37440304 PMCID: PMC10407928 DOI: 10.1021/acs.joc.3c01018] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Indexed: 07/14/2023]
Abstract
Toward photocontrol of anion transport across the bilayer membrane, stiff-stilbene, which has dimethyl substituents in the five-membered rings, is functionalized with amidopyrrole units. UV-vis and 1H NMR studies show high photostability and photoconversion yields. Where the photoaddressable (E)- and (Z)-isomers exhibit comparable binding affinities, as determined by 1H NMR titrations, fluorescence-based transport assays reveal significantly higher transport activity for the (Z)-isomers. Changing the binding affinity is thus not a necessity for modulating transport. Additionally, transport can be triggered in situ by light.
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Affiliation(s)
| | | | | | | | - Jorn de Jong
- Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2333
CC Leiden, The Netherlands
| | - Sander J. Wezenberg
- Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, 2333
CC Leiden, The Netherlands
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2
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Cooper A, Girish V, Subramaniam AB. Osmotic Pressure Enables High-Yield Assembly of Giant Vesicles in Solutions of Physiological Ionic Strengths. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2023; 39:5579-5590. [PMID: 37021722 PMCID: PMC10116648 DOI: 10.1021/acs.langmuir.3c00457] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Giant unilamellar vesicles (GUVs) are micrometer-scale minimal cellular mimics that are useful for bottom-up synthetic biology and drug delivery. Unlike assembly in low-salt solutions, assembly of GUVs in solutions with ionic concentrations of 100-150 mM Na/KCl (salty solutions) is challenging. Chemical compounds deposited on the substrate or incorporated into the lipid mixture could assist in the assembly of GUVs. Here, we investigate quantitatively the effects of temperature and chemical identity of six polymeric compounds and one small molecule compound on the molar yields of GUVs composed of three different lipid mixtures using high-resolution confocal microscopy and large data set image analysis. All the polymers moderately increased the yields of GUVs either at 22 or 37 °C, whereas the small molecule compound was ineffective. Low-gelling temperature agarose is the singular compound that consistently produces yields of GUVs of greater than 10%. We propose a free energy model of budding to explain the effects of polymers in assisting the assembly of GUVs. The osmotic pressure exerted on the membranes by the dissolved polymer balances the increased adhesion between the membranes, thus reducing the free energy for bud formation. Data obtained by modulating the ionic strength and ion valency of the solution shows that the evolution of the yield of GUVs supports our model's prediction. In addition, polymer-specific interactions with the substrate and the lipid mixture affects yields. The uncovered mechanistic insights provide a quantitative experimental and theoretical framework to guide future studies. Additionally, this work shows a facile means for obtaining GUVs in solutions of physiological ionic strengths.
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Affiliation(s)
- Alexis Cooper
- Department
of Chemistry and Biochemistry, University
of California, Merced, Merced, California 95343, United States
| | - Vaishnavi Girish
- Department
of Bioengineering, University of California,
Merced, Merced, California 95343, United States
| | - Anand Bala Subramaniam
- Department
of Bioengineering, University of California,
Merced, Merced, California 95343, United States
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3
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Docker A, Johnson TG, Kuhn H, Zhang Z, Langton MJ. Multistate Redox-Switchable Ion Transport Using Chalcogen-Bonding Anionophores. J Am Chem Soc 2023; 145:2661-2668. [PMID: 36652378 PMCID: PMC9896566 DOI: 10.1021/jacs.2c12892] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Synthetic supramolecular transmembrane anionophores have emerged as promising anticancer chemotherapeutics. However, key to their targeted application is achieving spatiotemporally controlled activity. Herein, we report a series of chalcogen-bonding diaryl tellurium-based transporters in which their anion binding potency and anionophoric activity are controlled through reversible redox cycling between Te oxidation states. This unprecedented in situ reversible multistate switching allows for switching between ON and OFF anion transport and is crucially achieved with biomimetic chemical redox couples.
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4
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Bickerton LE, Langton MJ. Controlling transmembrane ion transport via photo-regulated carrier mobility. Chem Sci 2022; 13:9531-9536. [PMID: 36091898 PMCID: PMC9400602 DOI: 10.1039/d2sc03322d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Accepted: 07/07/2022] [Indexed: 11/21/2022] Open
Abstract
Photo-gated anion transport is achieved by modulating the mobility of mobile carriers within a lipid bilayer membrane, using a photo-cleavable membrane anchor. This enables in situ, off–on activation of transport in vesicles.
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Affiliation(s)
- Laura E. Bickerton
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford 12 Mansfield Road, Oxford, OX1 3TA, UK
| | - Matthew J. Langton
- Chemistry Research Laboratory, Department of Chemistry, University of Oxford 12 Mansfield Road, Oxford, OX1 3TA, UK
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5
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Martínez-Crespo L, Halgreen L, Soares M, Marques I, Félix V, Valkenier H. Hydrazones in anion transporters: the detrimental effect of a second binding site. Org Biomol Chem 2021; 19:8324-8337. [PMID: 34523662 DOI: 10.1039/d1ob01279g] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Synthetic anion transporters can be developed using anion receptors that are able to bind the anion and stabilize it in the lipophilic interior of a bilayer membrane, and they usually contain functional groups with acidic NHs, such as ureas, thioureas and squaramides. To assess the suitability of acylhydrazones as a new functional group for the preparation of anion transporters, we have studied a family of thioureas functionalized with these and related functional groups. 1H NMR titrations and DFT calculations indicate that the thioureas bearing acylhydrazone groups behave as chloride receptors with two separate binding sites, of which the acylhydrazone binds weaker than the thiourea. Chloride transport studies show that the additional binding site has a detrimental effect on thiourea-based transporters, and this phenomenon is also observed for bis(thio)ureas with two separate binding sites. We propose that the presence of a second anion binding unit hinders the transport activity of the thiourea due to additional interactions with the phospholipids of the membrane. In agreement with this hypothesis, extensive molecular dynamics simulations suggest that the molecules will tend to be positioned in the water/lipid interface, driven by the interaction of the NHs of the thiourea and of the acylhydrazone groups with the POPC polar head groups and water molecules. Moreover, the interaction energies show that the poorest transporters have indeed the strongest interactions with the membrane phospholipids, inhibiting chloride transport. This detrimental effect of additional functional groups on transport activity should be considered when designing new ion transporters, unless these groups cooperatively promote anion recognition and transmembrane transport.
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Affiliation(s)
- Luis Martínez-Crespo
- Université Libre de Bruxelles (ULB), Engineering of Molecular NanoSystems, Ecole Polytechnique de Bruxelles, Avenue F.D. Roosevelt 50, CP165/64, B-1050 Brussels, Belgium.
| | - Lau Halgreen
- Université Libre de Bruxelles (ULB), Engineering of Molecular NanoSystems, Ecole Polytechnique de Bruxelles, Avenue F.D. Roosevelt 50, CP165/64, B-1050 Brussels, Belgium.
| | - Márcio Soares
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal.
| | - Igor Marques
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal.
| | - Vítor Félix
- CICECO - Aveiro Institute of Materials, Department of Chemistry, University of Aveiro, 3810-193, Aveiro, Portugal.
| | - Hennie Valkenier
- Université Libre de Bruxelles (ULB), Engineering of Molecular NanoSystems, Ecole Polytechnique de Bruxelles, Avenue F.D. Roosevelt 50, CP165/64, B-1050 Brussels, Belgium.
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6
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Schettini R, Tosolini M, ur Rehman J, Shah MR, Pierri G, Tedesco C, Della Sala G, De Riccardis F, Tecilla P, Izzo I. Role of Lipophilicity in the Activity of Hexameric Cyclic Peptoid Ion Carriers. European J Org Chem 2020. [DOI: 10.1002/ejoc.202001401] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Rosaria Schettini
- Dipartimento di Chimica e Biologia “A. Zambelli” Università degli Studi di Salerno Via Giovanni Paolo II, 132 84084 Fisciano Salerno Italy
| | - Massimo Tosolini
- Dipartimento di Scienze Chimiche e Farmaceutiche Università degli Studi di Trieste Via Giorgieri 1 34127 Trieste Italy
| | - Jawad ur Rehman
- Dipartimento di Scienze Chimiche e Farmaceutiche Università degli Studi di Trieste Via Giorgieri 1 34127 Trieste Italy
- H.E. J. Research Institute of Chemistry International Center for Chemical and Biological Sciences University of Karachi Karachi 75270 Pakistan
| | - Muhammed Raza Shah
- H.E. J. Research Institute of Chemistry International Center for Chemical and Biological Sciences University of Karachi Karachi 75270 Pakistan
| | - Giovanni Pierri
- Dipartimento di Chimica e Biologia “A. Zambelli” Università degli Studi di Salerno Via Giovanni Paolo II, 132 84084 Fisciano Salerno Italy
| | - Consiglia Tedesco
- Dipartimento di Chimica e Biologia “A. Zambelli” Università degli Studi di Salerno Via Giovanni Paolo II, 132 84084 Fisciano Salerno Italy
| | - Giorgio Della Sala
- Dipartimento di Chimica e Biologia “A. Zambelli” Università degli Studi di Salerno Via Giovanni Paolo II, 132 84084 Fisciano Salerno Italy
| | - Francesco De Riccardis
- Dipartimento di Chimica e Biologia “A. Zambelli” Università degli Studi di Salerno Via Giovanni Paolo II, 132 84084 Fisciano Salerno Italy
| | - Paolo Tecilla
- Dipartimento di Matematica Geoscienze Università degli Studi di Trieste Via Weiss 8 34127 Trieste Italy
| | - Irene Izzo
- Dipartimento di Chimica e Biologia “A. Zambelli” Università degli Studi di Salerno Via Giovanni Paolo II, 132 84084 Fisciano Salerno Italy
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7
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Park G, Gabbaï FP. Redox-controlled chalcogen and pnictogen bonding: the case of a sulfonium/stibonium dication as a preanionophore for chloride anion transport. Chem Sci 2020; 11:10107-10112. [PMID: 34094272 PMCID: PMC8162396 DOI: 10.1039/d0sc04417b] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Accepted: 08/28/2020] [Indexed: 12/25/2022] Open
Abstract
Our interest in the chemistry of tunable chalcogen and pnictogen bond donors as Lewis acidic platforms for the complexation and transport of anions has led us to investigate examples of such compounds that can be activated by redox events. Here, we describe the synthesis of [o-MePhS(C6H4)SbPh3]2+ ([3]2+) and [o-MePhS(C6H4)Sb(p-Tol)3]2+ ([4]2+), two dicationic stibonium/sulfonium bifunctional Lewis acids which were obtained by methylation of the phenylthioether derivatives [o-PhS(C6H4)SbPh3]+ ([1]+) and [o-PhS(C6H4)Sb(p-Tol)3]+ ([2]+), respectively. An evaluation of the chloride anion transport properties of these derivatives using chloride-loaded POPC unilamellar vesicles shows that the activity of the monocations [1]+ and [2]+ greatly exceeds that of the dications [3]2+ and [4]2+, a phenomenon that we assign to the higher lipophilicity of the monocationic compounds. Harnessing this large transport activity differential, we show that [4]2+ can be used as a prechloridophore that is readily activated by reduction of the sulfonium moiety. Indeed, [4]2+ reacts with GSH to afford [2]+ as an active transporter. This activation, which has been monitored in aqueous solution, can also be carried out in situ, in the presence of the chloride-loaded POPC unilamellar vesicles.
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Affiliation(s)
- Gyeongjin Park
- Department of Chemistry, Texas A&M University College Station Texas 77843-3255 USA
| | - François P Gabbaï
- Department of Chemistry, Texas A&M University College Station Texas 77843-3255 USA
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8
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Kerckhoffs A, Langton MJ. Reversible photo-control over transmembrane anion transport using visible-light responsive supramolecular carriers. Chem Sci 2020; 11:6325-6331. [PMID: 32953027 PMCID: PMC7472928 DOI: 10.1039/d0sc02745f] [Citation(s) in RCA: 45] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Accepted: 06/04/2020] [Indexed: 12/15/2022] Open
Abstract
Supramolecular anion carriers responsive to visible light enable reversible two-colour photo-control over transmembrane anion transport.
Ion transport across lipid bilayer membranes in biology is controlled by membrane proteins, which in turn are regulated in response to chemical-, physical- and photo-stimuli. The design of synthetic supramolecular ion transporters able to be precisely controlled by external signals, in particular bio-compatible wavelengths of visible light, is key for achieving spatio-temporal control over function. Here we report two-colour responsive molecular photo-switches that act as supramolecular transmembrane anion carriers. Reversible switching of the photo-switch within the lipid bilayer membrane is achieved using biocompatible visible wavelengths of light, such that temporal control over transmembrane anion transport is achieved through alternating irradiation with red and blue light.
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Affiliation(s)
- Aidan Kerckhoffs
- Chemistry Research Laboratory , University of Oxford , Mansfield Road , Oxford , OX1 3TA , UK .
| | - Matthew J Langton
- Chemistry Research Laboratory , University of Oxford , Mansfield Road , Oxford , OX1 3TA , UK .
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9
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Bickerton LE, Sterling AJ, Beer PD, Duarte F, Langton MJ. Transmembrane anion transport mediated by halogen bonding and hydrogen bonding triazole anionophores. Chem Sci 2020; 11:4722-4729. [PMID: 34122927 PMCID: PMC8159253 DOI: 10.1039/d0sc01467b] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Transmembrane ion transport by synthetic anionophores is typically achieved using polar hydrogen bonding anion receptors. Here we show that readily accessible halogen and hydrogen bonding 1,2,3-triazole derivatives can efficiently mediate anion transport across lipid bilayer membranes with unusual anti-Hofmeister selectivity. Importantly, the results demonstrate that the iodo-triazole systems exhibit the highest reported activity to date for halogen bonding anionophores, and enhanced transport efficiency relative to the hydrogen bonding analogues. In contrast, the analogous fluoro-triazole systems, which are unable to form intermolecular interactions with anions, are inactive. The halogen bonding anionophores also exhibit a remarkable intrinsic chloride over hydroxide selectivity, which is usually observed only in more complex anionophore designs, in contrast to the readily accessible acyclic systems reported here. This highlights the potential of iodo-triazoles as synthetically accessible and versatile motifs for developing more efficient anion transport systems. Computational studies provide further insight into the nature of the anion-triazole intermolecular interactions, examining the origins of the observed transport activity and selectivity of the systems, and revealing the role of enhanced charge delocalisation in the halogen bonding anion complexes. Halogen and hydrogen bonding 1,2,3-triazole derivatives efficiently mediate anion transport across lipid bilayer membranes with unusual anion selectivity profiles.![]()
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Affiliation(s)
- Laura E Bickerton
- Chemistry Research Laboratory, University of Oxford Mansfield Road Oxford OX1 3TA UK
| | - Alistair J Sterling
- Chemistry Research Laboratory, University of Oxford Mansfield Road Oxford OX1 3TA UK
| | - Paul D Beer
- Chemistry Research Laboratory, University of Oxford Mansfield Road Oxford OX1 3TA UK
| | - Fernanda Duarte
- Chemistry Research Laboratory, University of Oxford Mansfield Road Oxford OX1 3TA UK
| | - Matthew J Langton
- Chemistry Research Laboratory, University of Oxford Mansfield Road Oxford OX1 3TA UK
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10
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Bąk KM, Chabuda K, Montes H, Quesada R, Chmielewski MJ. 1,8-Diamidocarbazoles: an easily tuneable family of fluorescent anion sensors and transporters. Org Biomol Chem 2019; 16:5188-5196. [PMID: 29971303 DOI: 10.1039/c8ob01031e] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
The synthesis, structure and anion recognition properties of an extensive, rationally designed series of bisamide derivatives of 1,8-diaminocarbazole and 1,8-diamino-3,6-dichlorocarbazole are described. Despite simple structures and the presence of only three hydrogen bond donors, such compounds are remarkably strong and selective receptors for oxyanions in DMSO + 0.5%H2O. Owing to their carbazole fluorophore, they are also sensitive turn-on fluorescent sensors for H2PO4- and AcO-, with a more than 15-fold increase in fluorescence intensity upon binding. Despite relatively weak chloride affinity, some of the diamidocarbazoles have also been shown, for the first time, to be very active chloride transporters through lipid bilayers. The binding, sensing and transport properties of these receptors can be easily modulated by the usually overlooked variations in the length and degree of branching of their alkyl side arms. Overall, this study demonstrates that the 1,8-diamidocarbazole binding unit is a very promising and synthetically versatile platform for the development of fluorescent sensors and transporters for anions.
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Affiliation(s)
- Krzysztof M Bąk
- Faculty of Chemistry, Biological and Chemical Research Centre, University of Warsaw, Żwirki i Wigury 101, 02-089 Warszawa, Poland.
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11
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Spooner MJ, Li H, Marques I, Costa PMR, Wu X, Howe ENW, Busschaert N, Moore SJ, Light ME, Sheppard DN, Félix V, Gale PA. Fluorinated synthetic anion carriers: experimental and computational insights into transmembrane chloride transport. Chem Sci 2019; 10:1976-1985. [PMID: 30881627 PMCID: PMC6381411 DOI: 10.1039/c8sc05155k] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Accepted: 12/05/2018] [Indexed: 11/21/2022] Open
Abstract
A series of fluorinated tripodal tris-thioureas function as highly active anion transporters across lipid bilayers and cell membranes. Here, we investigate their mechanism of action using anion transport assays in cells and synthetic vesicles and molecular modelling of transporter-lipid interactions. When compared with non-fluorinated analogues, fluorinated compounds demonstrate a different mechanism of membrane transport because the free transporter cannot effectively diffuse through the membrane. As a result, in H+/Cl- cotransport assays, fluorinated transporters require the presence of oleic acid to form anionic oleate complexes for recycling of the transporter, whereas non-fluorinated analogues readily diffuse through the membrane as free transporters and show synergistic transport with the proton transporter gramicidin. Molecular dynamics simulations revealed markedly stronger transporter-lipid interactions for fluorinated compounds compared with non-fluorinated analogues and hence, higher energy barriers for fluorinated compounds to cross the membrane as free transporters. With use of appropriate proton transporters to ensure measurement of the correct rate-limiting steps, the transport rates determined in synthetic vesicle assays show excellent agreement with the anion transport rates determined in cell-based assays. We conclude that integration of computational and experimental methods provides a strategy to optimise transmembrane anion transporter design for biomedical applications.
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Affiliation(s)
| | - Hongyu Li
- School of Physiology, Pharmacology and Neuroscience , University of Bristol , Biomedical Sciences Building, University Walk , Bristol BS8 1TD , UK .
| | - Igor Marques
- Department of Chemistry , CICECO - Aveiro Institute of Materials , University of Aveiro , 3810-193 , Aveiro , Portugal .
| | - Pedro M R Costa
- Department of Chemistry , CICECO - Aveiro Institute of Materials , University of Aveiro , 3810-193 , Aveiro , Portugal .
| | - Xin Wu
- School of Chemistry , The University of Sydney , NSW 2006 , Australia .
| | - Ethan N W Howe
- School of Chemistry , The University of Sydney , NSW 2006 , Australia .
| | | | - Stephen J Moore
- Chemistry , University of Southampton , Southampton SO17 1BJ , UK
| | - Mark E Light
- Chemistry , University of Southampton , Southampton SO17 1BJ , UK
| | - David N Sheppard
- School of Physiology, Pharmacology and Neuroscience , University of Bristol , Biomedical Sciences Building, University Walk , Bristol BS8 1TD , UK .
| | - Vítor Félix
- Department of Chemistry , CICECO - Aveiro Institute of Materials , University of Aveiro , 3810-193 , Aveiro , Portugal .
| | - Philip A Gale
- Chemistry , University of Southampton , Southampton SO17 1BJ , UK
- School of Chemistry , The University of Sydney , NSW 2006 , Australia .
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12
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13
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Rokitskaya TI, Korshunova GA, Antonenko YN. Effect of Alkyl Chain Length on Translocation of Rhodamine B n-Alkyl Esters across Lipid Membranes. Biophys J 2018; 115:514-521. [PMID: 30031539 DOI: 10.1016/j.bpj.2018.07.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 06/27/2018] [Accepted: 07/02/2018] [Indexed: 01/03/2023] Open
Abstract
Voltage-dependent translocation of a series of cationic rhodamine B derivatives differing in n-alkyl chain length (ethyl, butyl, octyl, dodecyl, octadecyl) from one lipid monolayer to another was studied by measuring electrical current relaxation after a voltage jump on a planar bilayer phosphatidylcholine (PC) membrane. The rate of the translocation decreased in the following series of lipids: diphytanyl-PC > dioleyl-PC > diphytanoyl-PC > dierucoyl-PC. For all the lipids studied, the rate increased with lengthening of the hydrocarbon chain of the rhodamine derivatives, with the increase being most pronounced for the compounds having a short alkyl chain. The results could be well explained by involvement of molecule reorientations in the process of transmembrane flip-flop of the hydrophobic membrane-bound compounds. However, an impact of membrane dipole potential on the translocation rate could not be excluded, because the dipole potential could contribute to the energy barrier for translocation of the compounds located at different depths in the water-membrane interface. Based on the data obtained, a difference in the dipole potential of ester diphytanoyl-PC membranes with respect to ether diphytanyl-PC was estimated to be 108 mV, highlighting the contribution of a layer of oriented carbonyl groups of the lipids to the membrane dipole potential.
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Affiliation(s)
- Tatyana I Rokitskaya
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia.
| | - Galina A Korshunova
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia
| | - Yuri N Antonenko
- Belozersky Institute of Physico-Chemical Biology, Lomonosov Moscow State University, Moscow, Russia
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14
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Dias CM, Valkenier H, Davis AP. Anthracene Bisureas as Powerful and Accessible Anion Carriers. Chemistry 2018; 24:6262-6268. [PMID: 29493830 PMCID: PMC5947650 DOI: 10.1002/chem.201800508] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Indexed: 01/07/2023]
Abstract
Synthetic anion carriers (anionophores) have potential as biomedical research tools and as treatments for conditions arising from defective natural transport systems (notably cystic fibrosis). Highly active anionophores that are readily accessible and easily deliverable are especially valuable. Previous work has resulted in steroid and trans-decalin based anionophores with exceptional activity for chloride/nitrate exchange in vesicles, but poor accessibility and deliverability. This work shows that anthracene 1,8-bisureas can fulfil all three criteria. In particular, a bis-nitrophenyl derivative is prepared in two steps from commercial starting materials, yet shows comparable transport activity to the best currently known. Moreover, unlike earlier highly active systems, it does not need to be preincorporated in test vesicles but can be introduced subsequent to vesicle formation. This transporter also shows the ability to transfer between vesicles, and is therefore uniquely effective for anion transport at low transporter loadings. The results suggest that anthracene bisureas are promising candidates for application in biological research and medicine.
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Affiliation(s)
| | - Hennie Valkenier
- Université Libre de BruxellesAvenue F.D. Roosevelt 50, CP165/641050BrusselsBelgium
| | - Anthony P. Davis
- School of ChemistryUniversity of BristolCantock's CloseBristolBS8 1TSUK
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15
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Marques I, Costa PMR, Q. Miranda M, Busschaert N, Howe ENW, Clarke HJ, Haynes CJE, Kirby IL, Rodilla AM, Pérez-Tomás R, Gale PA, Félix V. Full elucidation of the transmembrane anion transport mechanism of squaramides using in silico investigations. Phys Chem Chem Phys 2018; 20:20796-20811. [DOI: 10.1039/c8cp02576b] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The anion carrier mechanism promoted by squaramide-based molecules has been elucidated by molecular dynamics and chloride efflux studies.
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Affiliation(s)
- Igor Marques
- Department of Chemistry
- CICECO – Aveiro Institute of Materials
- University of Aveiro
- Aveiro
- Portugal
| | - Pedro M. R. Costa
- Department of Chemistry
- CICECO – Aveiro Institute of Materials
- University of Aveiro
- Aveiro
- Portugal
| | - Margarida Q. Miranda
- Department of Chemistry
- CICECO – Aveiro Institute of Materials
- University of Aveiro
- Aveiro
- Portugal
| | | | - Ethan N. W. Howe
- Chemistry
- University of Southampton
- Southampton
- UK
- School of Chemistry
| | | | | | | | - Ananda M. Rodilla
- University of Barcelona
- Faculty of Medicine
- Dept. Pathology and Experimental Therapeutics
- CCBRG
- Barcelona
| | - Ricardo Pérez-Tomás
- University of Barcelona
- Faculty of Medicine
- Dept. Pathology and Experimental Therapeutics
- CCBRG
- Barcelona
| | - Philip A. Gale
- Chemistry
- University of Southampton
- Southampton
- UK
- School of Chemistry
| | - Vítor Félix
- Department of Chemistry
- CICECO – Aveiro Institute of Materials
- University of Aveiro
- Aveiro
- Portugal
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16
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Dias CM, Li H, Valkenier H, Karagiannidis LE, Gale PA, Sheppard DN, Davis AP. Anion transport by ortho-phenylene bis-ureas across cell and vesicle membranes. Org Biomol Chem 2018; 16:1083-1087. [DOI: 10.1039/c7ob02787g] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
These simple bis-ureas are found to be powerful anionophores in synthetic vesicles, and also in a live cell assay employing yellow fluorescent protein.
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Affiliation(s)
| | - Hongyu Li
- School of Physiology
- Pharmacology and Neuroscience
- University of Bristol
- Bristol
- UK
| | - Hennie Valkenier
- Engineering of Molecular NanoSystems
- Ecole Polytechnique de Bruxelles
- Université Libre de Bruxelles
- B-1050 Brussels
- Belgium
| | | | | | - David N. Sheppard
- School of Physiology
- Pharmacology and Neuroscience
- University of Bristol
- Bristol
- UK
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17
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Brea O, Mó O, Yáñez M, Montero-Campillo MM, Alkorta I, Elguero J. Are beryllium-containing biphenyl derivatives efficient anion sponges? J Mol Model 2017; 24:16. [DOI: 10.1007/s00894-017-3551-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Accepted: 11/27/2017] [Indexed: 11/28/2022]
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18
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Ozay O, Yildirim M, Ozay H. Synthesis, structural characterization, and anion interactions of new triazole-linked urea derivative fully substituted cyclotriphosphazene compounds. PHOSPHORUS SULFUR 2017. [DOI: 10.1080/10426507.2016.1237950] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Ozgur Ozay
- Department of Chemistry and Chemical Processing Technologies, Lapseki Vocational School, Canakkale Onsekiz Mart University, Canakkale/Lapseki, Turkey
| | - Mehmet Yildirim
- Department of Materials Science and Engineering, Faculty of Engineering, Canakkale Onsekiz Mart University, Canakkale, Turkey
| | - Hava Ozay
- Department of Chemistry, Inorganic Chemistry Laboratory, Faculty of Science and Arts, Canakkale Onsekiz Mart University, Canakkale, Turkey
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19
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Rokitskaya TI, Kosenko ID, Sivaev IB, Antonenko YN, Bregadze VI. Fast flip–flop of halogenated cobalt bis(dicarbollide) anion in a lipid bilayer membrane. Phys Chem Chem Phys 2017; 19:25122-25128. [DOI: 10.1039/c7cp04207h] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Halogenation dramatically affects the flip–flop of cobalt bis(dicarbollide) across the lipid membrane causing acceleration (Cl, Br, I) or deceleration (F).
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Affiliation(s)
- Tatyana I. Rokitskaya
- Belozersky Institute of Physico-Chemical Biology
- Lomonosov Moscow State University
- Moscow 119991
- Russian Federation
| | - Irina D. Kosenko
- A. N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- Moscow
- Russian Federation
| | - Igor B. Sivaev
- A. N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- Moscow
- Russian Federation
| | - Yuri N. Antonenko
- Belozersky Institute of Physico-Chemical Biology
- Lomonosov Moscow State University
- Moscow 119991
- Russian Federation
| | - Vladimir I. Bregadze
- A. N. Nesmeyanov Institute of Organoelement Compounds
- Russian Academy of Sciences
- Moscow
- Russian Federation
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20
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Montero-Campillo MM, Corral I, Mó O, Yáñez M, Alkorta I, Elguero J. Beryllium-based fluorenes as efficient anion sponges. Phys Chem Chem Phys 2017; 19:23052-23059. [DOI: 10.1039/c7cp03664g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The F−, Cl−, CN−, NO2−, NO3−, and SO42− anion affinities of 4,5-bis(BeX)-fluorene (X = H, F, Cl, CN, NC, and OCH3) derivatives have been calculated at the B3LYP/6-311+G(3df,2p)//B3LYP/6-31+G(d,p) level of theory.
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Affiliation(s)
| | - Inés Corral
- Departamento de Química
- Facultad de Ciencias
- Módulo 13
- and Institute of Advanced Chemical Sciences (IadChem) Universidad Autónoma de Madrid
- Campus de Excelencia UAM-CSIC
| | - Otilia Mó
- Departamento de Química
- Facultad de Ciencias
- Módulo 13
- and Institute of Advanced Chemical Sciences (IadChem) Universidad Autónoma de Madrid
- Campus de Excelencia UAM-CSIC
| | - Manuel Yáñez
- Departamento de Química
- Facultad de Ciencias
- Módulo 13
- and Institute of Advanced Chemical Sciences (IadChem) Universidad Autónoma de Madrid
- Campus de Excelencia UAM-CSIC
| | - Ibon Alkorta
- Instituto de Química Médica
- CSIC
- 28006 Madrid
- Spain
| | - José Elguero
- Instituto de Química Médica
- CSIC
- 28006 Madrid
- Spain
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21
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Edwards SJ, Marques I, Dias CM, Tromans RA, Lees NR, Félix V, Valkenier H, Davis AP. Tilting and Tumbling in Transmembrane Anion Carriers: Activity Tuning through n-Alkyl Substitution. Chemistry 2016; 22:2004-2011. [PMID: 26748870 PMCID: PMC5064602 DOI: 10.1002/chem.201504057] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Indexed: 11/07/2022]
Abstract
Anion transport by synthetic carriers (anionophores) holds promise for medical applications, especially the treatment of cystic fibrosis. Among the factors which determine carrier activity, the size and disposition of alkyl groups is proving remarkably important. Herein we describe a series of dithioureidodecalin anionophores, in which alkyl substituents on one face are varied from C0 to C10 in two-carbon steps. Activities increase then decrease as the chain length grows, peaking quite sharply at C6 . Molecular dynamics simulations showed the transporter chloride complexes releasing chloride as they approach the membrane-aqueous interface. The free transporter then stays at the interface, adopting an orientation that depends on the alkyl substituent. If chloride release is prevented, the complex is positioned similarly. Longer chains tilt the binding site away from the interface, potentially freeing the transporter or complex to move through the membrane. However, chains which are too long can also slow transport by inhibiting movement, and especially reorientation, within the phospholipid bilayer.
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Affiliation(s)
- Sophie J Edwards
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
| | - Igor Marques
- Departamento de Química, iBiMED and CICECO, Universidade de Aveiro, 3810-193, Aveiro, Portugal
| | - Christopher M Dias
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
| | - Robert A Tromans
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
| | - Nicholas R Lees
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK
| | - Vítor Félix
- Departamento de Química, iBiMED and CICECO, Universidade de Aveiro, 3810-193, Aveiro, Portugal.
| | - Hennie Valkenier
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK.
| | - Anthony P Davis
- School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, UK.
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