51
|
Feng WX, Sun Z, Zhang Y, Legrand YM, Petit E, Su CY, Barboiu M. Bis-15-crown-5-ether-pillar[5]arene K +-Responsive Channels. Org Lett 2017; 19:1438-1441. [PMID: 28262027 DOI: 10.1021/acs.orglett.7b00352] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
An artificial selective K+ channel is formed from the supramolecular organization on bis(benzo-15-crown-5- ether-ureido)-pillar[5]arene compound. This channel achieves a selectivity of SK+/Na+ = 5 for an initial transport rate of kK+ = 3.2 × 10-3 s-1. The cation-file diffusion occurs via selective macrocyclic-filters anchored on inactive supporting pillar[5]arene relays. The sandwich-type binding geometry of the K+ cation by two 15-crown-5 moieties sites is a key feature influencing channel efficiency.
Collapse
Affiliation(s)
- Wei-Xu Feng
- Lehn Institute of Functional Materials, School of Chemistry and Chemical Engineering, Sun Yat-Sen University , 135 Xingang West Road, Guangzhou 510275, China.,Adaptive Supramolecular Nanosystems Group, Institut Europeen des Membranes, ENSCM/UMII/UMR-CNRS 5635 , Place Eugene Bataillon, CC 047, 34095 Montpellier, Cedex 5, France
| | - Zhanhu Sun
- Adaptive Supramolecular Nanosystems Group, Institut Europeen des Membranes, ENSCM/UMII/UMR-CNRS 5635 , Place Eugene Bataillon, CC 047, 34095 Montpellier, Cedex 5, France
| | - Yan Zhang
- Adaptive Supramolecular Nanosystems Group, Institut Europeen des Membranes, ENSCM/UMII/UMR-CNRS 5635 , Place Eugene Bataillon, CC 047, 34095 Montpellier, Cedex 5, France
| | - Yves-Marie Legrand
- Adaptive Supramolecular Nanosystems Group, Institut Europeen des Membranes, ENSCM/UMII/UMR-CNRS 5635 , Place Eugene Bataillon, CC 047, 34095 Montpellier, Cedex 5, France
| | - Eddy Petit
- Adaptive Supramolecular Nanosystems Group, Institut Europeen des Membranes, ENSCM/UMII/UMR-CNRS 5635 , Place Eugene Bataillon, CC 047, 34095 Montpellier, Cedex 5, France
| | - Cheng-Yong Su
- Lehn Institute of Functional Materials, School of Chemistry and Chemical Engineering, Sun Yat-Sen University , 135 Xingang West Road, Guangzhou 510275, China
| | - Mihail Barboiu
- Lehn Institute of Functional Materials, School of Chemistry and Chemical Engineering, Sun Yat-Sen University , 135 Xingang West Road, Guangzhou 510275, China.,Adaptive Supramolecular Nanosystems Group, Institut Europeen des Membranes, ENSCM/UMII/UMR-CNRS 5635 , Place Eugene Bataillon, CC 047, 34095 Montpellier, Cedex 5, France
| |
Collapse
|
52
|
Schneider S, Licsandru ED, Kocsis I, Gilles A, Dumitru F, Moulin E, Tan J, Lehn JM, Giuseppone N, Barboiu M. Columnar Self-Assemblies of Triarylamines as Scaffolds for Artificial Biomimetic Channels for Ion and for Water Transport. J Am Chem Soc 2017; 139:3721-3727. [DOI: 10.1021/jacs.6b12094] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Susanne Schneider
- ISIS, Institut de Science et d’Ingénierie Supramoléculaires, 8 allée Gaspard Monge, 67000 Strasbourg, France
- SAMS Research
Group, University of Strasbourg, Institut
Charles Sadron, CNRS, 23 rue du Loess,
BP 84047, 67034 Strasbourg Cedex 2, France
| | - Erol-Dan Licsandru
- Adaptive Supramolecular
Nanosystems Group, Institut Europèen des Membranes, ENSCM-UMII-CNRS UMR-5635, Place
Eugène Bataillon, CC 047, F-34095 Montpellier, France
| | - Istvan Kocsis
- Adaptive Supramolecular
Nanosystems Group, Institut Europèen des Membranes, ENSCM-UMII-CNRS UMR-5635, Place
Eugène Bataillon, CC 047, F-34095 Montpellier, France
| | - Arnaud Gilles
- Adaptive Supramolecular
Nanosystems Group, Institut Europèen des Membranes, ENSCM-UMII-CNRS UMR-5635, Place
Eugène Bataillon, CC 047, F-34095 Montpellier, France
| | - Florina Dumitru
- Adaptive Supramolecular
Nanosystems Group, Institut Europèen des Membranes, ENSCM-UMII-CNRS UMR-5635, Place
Eugène Bataillon, CC 047, F-34095 Montpellier, France
| | - Emilie Moulin
- SAMS Research
Group, University of Strasbourg, Institut
Charles Sadron, CNRS, 23 rue du Loess,
BP 84047, 67034 Strasbourg Cedex 2, France
| | - Junjun Tan
- SAMS Research
Group, University of Strasbourg, Institut
Charles Sadron, CNRS, 23 rue du Loess,
BP 84047, 67034 Strasbourg Cedex 2, France
| | - Jean-Marie Lehn
- ISIS, Institut de Science et d’Ingénierie Supramoléculaires, 8 allée Gaspard Monge, 67000 Strasbourg, France
| | - Nicolas Giuseppone
- SAMS Research
Group, University of Strasbourg, Institut
Charles Sadron, CNRS, 23 rue du Loess,
BP 84047, 67034 Strasbourg Cedex 2, France
| | - Mihail Barboiu
- Adaptive Supramolecular
Nanosystems Group, Institut Europèen des Membranes, ENSCM-UMII-CNRS UMR-5635, Place
Eugène Bataillon, CC 047, F-34095 Montpellier, France
| |
Collapse
|
53
|
Behera H, Ramkumar V, Madhavan N. Triamide macrocyclic chloride receptors via a one-pot tandem reduction–condensation–cyclization reaction. Org Biomol Chem 2017; 15:4937-4940. [DOI: 10.1039/c7ob00642j] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A chloride binding triamide macrocycle has been developed in one pot from the corresponding monomer via tandem reduction–condensation–cyclization reactions.
Collapse
Affiliation(s)
| | | | - Nandita Madhavan
- Department of Chemistry
- Indian Institute of Technology
- Chennai
- India
- Department of Chemistry
| |
Collapse
|
54
|
Ortolan AO, Caramori GF, Matthias Bickelhaupt F, Parreira RLT, Muñoz-Castro A, Kar T. How the electron-deficient cavity of heterocalixarenes recognizes anions: insights from computation. Phys Chem Chem Phys 2017; 19:24696-24705. [DOI: 10.1039/c7cp03925e] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The nature of bridging heteroatoms in a heterocalixarene structure has a crucial role in anion recognition.
Collapse
Affiliation(s)
- Alexandre O. Ortolan
- Departamento de Química
- Universidade Federal de Santa Catarina
- Campus Universitário Trindade
- Florianópolis
- Brazil
| | - Giovanni F. Caramori
- Departamento de Química
- Universidade Federal de Santa Catarina
- Campus Universitário Trindade
- Florianópolis
- Brazil
| | - F. Matthias Bickelhaupt
- Department of Theoretical Chemistry and Amsterdam Center for Multiscale Modeling (ACMM)
- Vrije Universiteit Amsterdam
- 1081 HV Amsterdam
- The Netherlands
- Institute of Molecules and Materials
| | - Renato L. T. Parreira
- Núcleo de Pesquisa em Ciências Exatas e Tecnológicas
- Universidade de Franca
- Franca
- Brazil
| | - Alvaro Muñoz-Castro
- Lab. de Química Inorgánica y Materiales Moleculares
- Universidad Autonoma de Chile
- Santiago
- Chile
- Doctorado en Fisicoquímica Molecular
| | - Tapas Kar
- Department of Chemistry and Biochemistry
- Utah State University
- Logan
- USA
| |
Collapse
|
55
|
Saha T, Gautam A, Mukherjee A, Lahiri M, Talukdar P. Chloride Transport through Supramolecular Barrel-Rosette Ion Channels: Lipophilic Control and Apoptosis-Inducing Activity. J Am Chem Soc 2016; 138:16443-16451. [DOI: 10.1021/jacs.6b10379] [Citation(s) in RCA: 99] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Tanmoy Saha
- Department
of Chemistry and ‡Department of Biology, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune, Maharashtra 411008, India
| | - Amitosh Gautam
- Department
of Chemistry and ‡Department of Biology, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune, Maharashtra 411008, India
| | - Arnab Mukherjee
- Department
of Chemistry and ‡Department of Biology, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune, Maharashtra 411008, India
| | - Mayurika Lahiri
- Department
of Chemistry and ‡Department of Biology, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune, Maharashtra 411008, India
| | - Pinaki Talukdar
- Department
of Chemistry and ‡Department of Biology, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune, Maharashtra 411008, India
| |
Collapse
|
56
|
Davis J. Identifying Some Valinomycins for Chloride. Chem 2016. [DOI: 10.1016/j.chempr.2016.06.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
57
|
Ghorai A, Achari B, Chattopadhyay P. Self-assembly of cyclic peptides and peptidomimetic macrocycles: linking structure with function. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.04.071] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
58
|
Sun Z, Gilles A, Kocsis I, Legrand YM, Petit E, Barboiu M. Squalyl Crown Ether Self-Assembled Conjugates: An Example of Highly Selective Artificial K+
Channels. Chemistry 2016; 22:2158-2164. [DOI: 10.1002/chem.201503979] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2015] [Indexed: 11/06/2022]
Affiliation(s)
- Zhanhu Sun
- Adaptive Supramolecular Nanosystems Group; Institut Européen des Membranes; University of Montpellier/ENSCM/CNRS 5635; Pl. Eugène Bataillon, CC 047 34095 Montpellier, Cedex 5 France
| | - Arnaud Gilles
- Adaptive Supramolecular Nanosystems Group; Institut Européen des Membranes; University of Montpellier/ENSCM/CNRS 5635; Pl. Eugène Bataillon, CC 047 34095 Montpellier, Cedex 5 France
| | - Istvan Kocsis
- Adaptive Supramolecular Nanosystems Group; Institut Européen des Membranes; University of Montpellier/ENSCM/CNRS 5635; Pl. Eugène Bataillon, CC 047 34095 Montpellier, Cedex 5 France
| | - Yves-Marie Legrand
- Adaptive Supramolecular Nanosystems Group; Institut Européen des Membranes; University of Montpellier/ENSCM/CNRS 5635; Pl. Eugène Bataillon, CC 047 34095 Montpellier, Cedex 5 France
| | - Eddy Petit
- Adaptive Supramolecular Nanosystems Group; Institut Européen des Membranes; University of Montpellier/ENSCM/CNRS 5635; Pl. Eugène Bataillon, CC 047 34095 Montpellier, Cedex 5 France
| | - Mihail Barboiu
- Adaptive Supramolecular Nanosystems Group; Institut Européen des Membranes; University of Montpellier/ENSCM/CNRS 5635; Pl. Eugène Bataillon, CC 047 34095 Montpellier, Cedex 5 France
| |
Collapse
|
59
|
Wang XD, Li S, Ao YF, Wang QQ, Huang ZT, Wang DX. Oxacalix[2]arene[2]triazine based ion-pair transporters. Org Biomol Chem 2016; 14:330-4. [DOI: 10.1039/c5ob02291f] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Heteracalixaromatics are a new generation of macrocyclic hosts showing a unique structure and versatile recognition properties towards various guests.
Collapse
Affiliation(s)
- Xu-Dong Wang
- Beijing National Laboratory for Molecular Sciences
- CAS Key Laboratory of Molecular Recognition and Function
- Institute of Chemistry
- Beijing
- China
| | - Sen Li
- Beijing National Laboratory for Molecular Sciences
- CAS Key Laboratory of Molecular Recognition and Function
- Institute of Chemistry
- Beijing
- China
| | - Yu-Fei Ao
- Beijing National Laboratory for Molecular Sciences
- CAS Key Laboratory of Molecular Recognition and Function
- Institute of Chemistry
- Beijing
- China
| | - Qi-Qiang Wang
- Beijing National Laboratory for Molecular Sciences
- CAS Key Laboratory of Molecular Recognition and Function
- Institute of Chemistry
- Beijing
- China
| | - Zhi-Tang Huang
- Beijing National Laboratory for Molecular Sciences
- CAS Key Laboratory of Molecular Recognition and Function
- Institute of Chemistry
- Beijing
- China
| | - De-Xian Wang
- Beijing National Laboratory for Molecular Sciences
- CAS Key Laboratory of Molecular Recognition and Function
- Institute of Chemistry
- Beijing
- China
| |
Collapse
|
60
|
Efficient, non-toxic anion transport by synthetic carriers in cells and epithelia. Nat Chem 2015; 8:24-32. [PMID: 26673261 DOI: 10.1038/nchem.2384] [Citation(s) in RCA: 125] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Accepted: 09/24/2015] [Indexed: 12/12/2022]
Abstract
Transmembrane anion transporters (anionophores) have potential for new modes of biological activity, including therapeutic applications. In particular they might replace the activity of defective anion channels in conditions such as cystic fibrosis. However, data on the biological effects of anionophores are scarce, and it remains uncertain whether such molecules are fundamentally toxic. Here, we report a biological study of an extensive series of powerful anion carriers. Fifteen anionophores were assayed in single cells by monitoring anion transport in real time through fluorescence emission from halide-sensitive yellow fluorescent protein. A bis-(p-nitrophenyl)ureidodecalin shows especially promising activity, including deliverability, potency and persistence. Electrophysiological tests show strong effects in epithelia, close to those of natural anion channels. Toxicity assays yield negative results in three cell lines, suggesting that promotion of anion transport may not be deleterious to cells. We therefore conclude that synthetic anion carriers are realistic candidates for further investigation as treatments for cystic fibrosis.
Collapse
|
61
|
Mahon E, Garai S, Müller A, Barboiu M. Biomimetic Approach for Ion Channels Based on Surfactant Encapsulated Spherical Porous Metal-Oxide Capsules. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:5165-5170. [PMID: 26248195 DOI: 10.1002/adma.201501255] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2015] [Revised: 06/28/2015] [Indexed: 06/04/2023]
Abstract
Distinguished hybrid clusters with hydrophilic and hydrophobic interiors embedded within cationic surfactant shells are spontaneously inserted into lipid bilayers, showing well-defined ionic conductance behaviors. The transport via the narrow pore gates acting as selectivity filters is controlled by the dehydration energy of the cations.
Collapse
Affiliation(s)
- Eugene Mahon
- Adaptive Supramolecular Nanosystems Group, Institut Européen des Membranes, ENSCM-UMII-CNRS UMR-5635, Place Eugène Bataillon, CC 047, F-34095, Montpellier, France
| | - Somenath Garai
- Universität Bielefeld, Fakultät für Chemie, Postfach 100131, 33501, Bielefeld, Germany
| | - Achim Müller
- Universität Bielefeld, Fakultät für Chemie, Postfach 100131, 33501, Bielefeld, Germany
| | - Mihail Barboiu
- Adaptive Supramolecular Nanosystems Group, Institut Européen des Membranes, ENSCM-UMII-CNRS UMR-5635, Place Eugène Bataillon, CC 047, F-34095, Montpellier, France
| |
Collapse
|
62
|
Barboiu M, Cazade PA, Le Duc Y, Legrand YM, van der Lee A, Coasne B. Polarized Water Wires under Confinement in Chiral Channels. J Phys Chem B 2015; 119:8707-17. [DOI: 10.1021/acs.jpcb.5b03322] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Mihail Barboiu
- Adaptive
Supramolecular Nanosystems Group, Institut Européen des Membranes, ENSCM-UM-UMR-CNRS5635, Place Eugène Bataillon CC047, 34095 Montpellier Cedex 5, France
| | - Pierre-André Cazade
- MultiScale
Materials Science for Energy and Environment, UMI 3466 CNRS-MIT and
Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| | - Yann Le Duc
- Adaptive
Supramolecular Nanosystems Group, Institut Européen des Membranes, ENSCM-UM-UMR-CNRS5635, Place Eugène Bataillon CC047, 34095 Montpellier Cedex 5, France
| | - Yves-Marie Legrand
- Adaptive
Supramolecular Nanosystems Group, Institut Européen des Membranes, ENSCM-UM-UMR-CNRS5635, Place Eugène Bataillon CC047, 34095 Montpellier Cedex 5, France
| | - Arie van der Lee
- Adaptive
Supramolecular Nanosystems Group, Institut Européen des Membranes, ENSCM-UM-UMR-CNRS5635, Place Eugène Bataillon CC047, 34095 Montpellier Cedex 5, France
| | - Benoit Coasne
- Institut Charles Gerhardt Montpellier (ICGM), UMR 5253 CNRS/ENSCM/Université Montpellier 2, 8 rue
de l’Ecole Normale, F-34296 Montpellier, France
- MultiScale
Materials Science for Energy and Environment, UMI 3466 CNRS-MIT and
Department of Civil and Environmental Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, United States
| |
Collapse
|
63
|
Elmes RBP, Busschaert N, Czech DD, Gale PA, Jolliffe KA. pH switchable anion transport by an oxothiosquaramide. Chem Commun (Camb) 2015; 51:10107-10. [PMID: 25998008 DOI: 10.1039/c5cc03625a] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
An oxothiosquaramide was shown to bind to chloride through hydrogen bonding interactions in DMSO and found to exhibit pH switchable choride transport across phospholipid bilayers via an antiport transport mechanism.
Collapse
Affiliation(s)
- Robert B P Elmes
- School of Chemistry (F11), The University of Sydney, 2006 NSW, Australia.
| | | | | | | | | |
Collapse
|
64
|
Busschaert N, Caltagirone C, Van Rossom W, Gale PA. Applications of Supramolecular Anion Recognition. Chem Rev 2015; 115:8038-155. [PMID: 25996028 DOI: 10.1021/acs.chemrev.5b00099] [Citation(s) in RCA: 858] [Impact Index Per Article: 95.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
| | - Claudia Caltagirone
- ‡Dipartimento di Scienze Chimiche e Geologiche, Università degli Studi di Cagliari, S.S. 554 Bivio per Sestu, 09042 Monserrato, Cagliari, Italy
| | - Wim Van Rossom
- †Chemistry, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Philip A Gale
- †Chemistry, University of Southampton, Southampton SO17 1BJ, United Kingdom
| |
Collapse
|
65
|
Berezin SK. Valinomycin as a Classical Anionophore: Mechanism and Ion Selectivity. J Membr Biol 2015; 248:713-26. [DOI: 10.1007/s00232-015-9784-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2014] [Accepted: 02/18/2015] [Indexed: 10/23/2022]
|
66
|
Evans NH, Beer PD. Advances in anion supramolecular chemistry: from recognition to chemical applications. Angew Chem Int Ed Engl 2014; 53:11716-54. [PMID: 25204549 DOI: 10.1002/anie.201309937] [Citation(s) in RCA: 425] [Impact Index Per Article: 42.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2013] [Indexed: 12/11/2022]
Abstract
Since the start of this millennium, remarkable progress in the binding and sensing of anions has been taking place, driven in part by discoveries in the use of hydrogen bonding, as well as the previously under-exploited anion-π interactions and halogen bonding. However, anion supramolecular chemistry has developed substantially beyond anion recognition, and now encompasses a diverse range of disciplines. Dramatic advance has been made in the anion-templated synthesis of macrocycles and interlocked molecular architectures, while the study of transmembrane anion transporters has flourished from almost nothing into a rapidly maturing field of research. The supramolecular chemistry of anions has also found real practical use in a variety of applications such as catalysis, ion extraction, and the use of anions as stimuli for responsive chemical systems.
Collapse
Affiliation(s)
- Nicholas H Evans
- Department of Chemistry, Lancaster University, Lancaster, LA1 4YB (UK).
| | | |
Collapse
|
67
|
Evans NH, Beer PD. Supramolekulare Chemie von Anionen: von der Erkennung zur chemischen Anwendung. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201309937] [Citation(s) in RCA: 83] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
|
68
|
An artificial primitive mimic of the Gramicidin-A channel. Nat Commun 2014; 5:4142. [PMID: 24967600 DOI: 10.1038/ncomms5142] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Accepted: 05/15/2014] [Indexed: 11/08/2022] Open
Abstract
Gramicidin A (gA) is the simplest known natural channel, and important progress in improving conduction activity has previously been obtained with modified natural gAs. However, simple artificial systems mimicking the gA functions are unknown. Here we show that gA can be mimicked using a simple synthetic triazole or 'T-channel' forming compound (TCT), having similar constitutional functions as the natural gAs. As in gA channels, the carbonyl moieties of the TCT, which point toward the T-channel core and surround the transport direction, are solvated by water. The net-dipolar alignment of water molecules along the chiral pore surfaces influences the conduction of protons/ions, envisioned to diffuse along dipolar hydrophilic pathways. Theoretical simulations and experimental assays reveal that the conduction through the T-channel, similar to that in gA, presents proton/water conduction, cation/anion selectivity and large open channel-conductance states. T-channels--associating supramolecular chirality with dipolar water alignment--represent an artificial primitive mimic of gA.
Collapse
|
69
|
|
70
|
Costa PJ, Marques I, Félix V. Interaction of a calix[4]arene derivative with a DOPC bilayer: Biomolecular simulations towards chloride transport. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2014; 1838:890-901. [DOI: 10.1016/j.bbamem.2013.11.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2013] [Revised: 11/25/2013] [Accepted: 11/26/2013] [Indexed: 10/25/2022]
|
71
|
Lalgee LJ, Grierson L, Fairman RA, Jaggernauth GE, Schulte A, Benz R, Winterhalter M. Synthetic ion transporters: pore formation in bilayers via coupled activity of non-spanning cobalt-cage amphiphiles. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2014; 1838:1247-54. [PMID: 24508756 DOI: 10.1016/j.bbamem.2014.01.032] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2013] [Revised: 01/07/2014] [Accepted: 01/27/2014] [Indexed: 11/16/2022]
Abstract
Three amphiphilic cobalt-cage congeners bearing a diaza-crown bridge and varying alkyl chains (1:2:3; n = 12, 16, 18) have been assessed for their ion transport across planar lipid bilayer membranes. In symmetrical electrolyte solutions, a range of ion transport activity is provoked: 1 disrupts painted (fluid) bilayers in a detergent-like mode of action; 2 forms conducting "pores" in folded (rigid) membranes with long open lifetimes (>2 min) while 3 requires the larger auxiliary solvent volume and lower lateral stress of painted membranes to effect ion transport via long-lived pores. Hill analysis of the conductance variation with monomer concentration yields coefficients (2:3; n = 2.3, 1.9) in support of dimeric (n = 2) membrane-active structures, for which the derived "pore" radii are correlated with charge-density of the transported cations and their affinity for the crown moiety. A toroidal-pore model is invoked to account for the flux of guest ions through planar bilayer membranes without a fast-diffusing intermediary or direct membrane-spanning structure.
Collapse
Affiliation(s)
- Lorale J Lalgee
- The Department of Chemistry, The University of the West Indies, St. Augustine, Trinidad and Tobago.
| | - Lebert Grierson
- The Department of Chemistry, The University of the West Indies, St. Augustine, Trinidad and Tobago.
| | - Richard A Fairman
- The Department of Chemistry, The University of the West Indies, St. Augustine, Trinidad and Tobago.
| | - Gina E Jaggernauth
- The Department of Chemistry, The University of the West Indies, St. Augustine, Trinidad and Tobago.
| | - Albert Schulte
- The Department of Chemistry, The University of the West Indies, St. Augustine, Trinidad and Tobago.
| | - Roland Benz
- School of Engineering and Science, Jacobs University Bremen, Germany.
| | | |
Collapse
|
72
|
|
73
|
Lin RL, Sun WQ, Yao WR, Zhu J, Liu JX. Anion concentration control in the self-assembly of symmetrical α,α′,δ,δ′-tetramethyl-cucurbit[6]uril-based tubular architectures. RSC Adv 2014. [DOI: 10.1039/c4ra01671h] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
74
|
Busschaert N, Karagiannidis LE, Wenzel M, Haynes CJE, Wells NJ, Young PG, Makuc D, Plavec J, Jolliffe KA, Gale PA. Synthetic transporters for sulfate: a new method for the direct detection of lipid bilayer sulfate transport. Chem Sci 2014. [DOI: 10.1039/c3sc52006d] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
|
75
|
Qureshi N, Yufit DS, Steed KM, Howard JAK, Steed JW. Hydrogen bonding effects in anion binding calixarenes. CrystEngComm 2014. [DOI: 10.1039/c4ce01240b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The interplay of anion binding, intra- and intermolecular hydrogen boning patterns in a range of receptors and sensors for chloride anion are discussed.
Collapse
Affiliation(s)
- Naseem Qureshi
- Department of Chemistry
- Karakoram International University
- 15100 Gilgit, Pakistan
| | | | | | | | | |
Collapse
|
76
|
Busschaert N, Elmes RBP, Czech DD, Wu X, Kirby IL, Peck EM, Hendzel KD, Shaw SK, Chan B, Smith BD, Jolliffe KA, Gale PA. Thiosquaramides: pH switchable anion transporters. Chem Sci 2014; 5:3617-3626. [PMID: 26146535 DOI: 10.1039/c4sc01629g] [Citation(s) in RCA: 96] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
The transport of anions across cellular membranes is an important biological function governed by specialised proteins. In recent years, many small molecules have emerged that mimick the anion transport behaviour of these proteins, but only a few of these synthetic molecules also display the gating/switching behaviour seen in biological systems. A small series of thiosquaramides was synthesised and their pH-dependent chloride binding and anion transport behaviour was investigated using 1H NMR titrations, single crystal X-ray diffraction and a variety of vesicle-based techniques. Spectrophotometric titrations and DFT calculations revealed that the thiosquaramides are significantly more acidic than their oxosquaramide analogues, with pKa values between 4.0 and 9.0. This led to the observation that at pH 7.2 the anion transport ability of the thiosquaramides is fully switched OFF due to deprotonation of the receptor, but is completely switched ON at lower pH.
Collapse
Affiliation(s)
| | - Robert B P Elmes
- School of Chemistry (F11), The University of Sydney, 2006 NSW, Australia
| | - Dawid D Czech
- Chemistry, University of Southampton, Southampton, SO17 1BJ, UK
| | - Xin Wu
- Chemistry, University of Southampton, Southampton, SO17 1BJ, UK
| | | | - Evan M Peck
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana, 46556, USA
| | - Kevin D Hendzel
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana, 46556, USA
| | - Scott K Shaw
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana, 46556, USA
| | - Bun Chan
- School of Chemistry (F11), The University of Sydney, 2006 NSW, Australia
| | - Bradley D Smith
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana, 46556, USA
| | - Katrina A Jolliffe
- School of Chemistry (F11), The University of Sydney, 2006 NSW, Australia
| | - Philip A Gale
- Chemistry, University of Southampton, Southampton, SO17 1BJ, UK ; Department of Chemistry, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia
| |
Collapse
|
77
|
Valkenier H, Haynes CJE, Herniman J, Gale PA, Davis AP. Lipophilic balance – a new design principle for transmembrane anion carriers. Chem Sci 2014. [DOI: 10.1039/c3sc52962b] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
|
78
|
Wehunt MP, Winschel CA, Khan AK, Guo TL, Abdrakhmanova GR, Sidorov V. Controlled drug-release system based on pH-sensitive chloride-triggerable liposomes. J Liposome Res 2013; 23:37-46. [PMID: 23363303 DOI: 10.3109/08982104.2012.727423] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
New pH-sensitive lipids were synthesized and utilized in formulations of liposomes suitable for controlled drug release. These liposomes contain various amounts of NaCl in the internal aqueous compartments. The release of the drug model is triggered by an application of HCl cotransporter and exogenous physiologically relevant NaCl solution. HCl cotransporter allows an uptake of HCl by liposomes to the extent of their being proportional to the transmembrane Cl(-) gradient. Therefore, each set of liposomes undergoes internal acidification, which, ultimately, leads to the hydrolysis of the pH-sensitive lipids and content release at the desired time. The developed system releases the drug model in a stepwise fashion, with the release stages separated by periods of low activity. These liposomes were found to be insensitive to physiological concentrations of human serum albumin and to be nontoxic to cells at concentrations exceeding pharmacological relevance. These results render this new drug-release model potentially suitable for in vivo applications.
Collapse
Affiliation(s)
- Mark P Wehunt
- Department of Chemistry, Virginia Commonwealth University, 1001 West Main Street, Richmond, Virginia 23284, USA
| | | | | | | | | | | |
Collapse
|
79
|
Valkenier H, Davis AP. Making a match for Valinomycin: steroidal scaffolds in the design of electroneutral, electrogenic anion carriers. Acc Chem Res 2013; 46:2898-909. [PMID: 23514113 DOI: 10.1021/ar4000345] [Citation(s) in RCA: 89] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The natural product Valinomycin is a well-known transmembrane cation carrier. Despite being uncharged, this molecule can extract potassium ions from water without counterions and ferry them through a membrane interior. Because it only transports positive ions, it is electrogenic, mediating a flow of charge across the membrane. Equivalent agents for anions would be valuable research tools and may have therapeutic applications, especially in the treatment of "channelopathies" such as cystic fibrosis. However, no such molecules have been found in nature. In this Account, we describe our research toward synthetic and rationally designed "anti-Valinomycins". As our core approach to this problem, we used the steroid nucleus, provided by cholic acid, as a scaffold for the assembly of anion receptors. By positioning H-bond donors on this framework, especially urea and thiourea groups in conformationally constrained axial positions, we created binding sites capable of exceptionally high affinities (up to 10(11) M(-1) for R4N(+)Cl(-) in chloroform). The extended hydrocarbon surface of the steroid helped to maintain compatibility with nonpolar media. When we tested these "cholapods" for chloride transport in vesicles, they provided the first evidence for electrogenic anion transport mediated by electroneutral organic carriers: in other words, they are the first authenticated anti-Valinomycins. They also proved active in live cells that we grew and assayed in an Ussing chamber. In subsequent work, we have shown that the cholapods can exhibit very high activities, with transport observed down to carrier/lipid ratios of 1:250,000. We also understand some of the effects of structure on the activity of these molecules. For example, in most cases, powerful transporters also act as powerful receptors. On the other hand, some modifications which favor binding do not promote transport. We gained functional advantages by cyclizing the cholapod architecture, which encloses the anion binding site. We could also simplify the structure without compromising function. A steroid-inspired trans-decalin framework has proved highly effective and may lead to agents with practical advantages. Changing an ester side-chain in this system revealed a surprising effect, whereby increased length and/or lipophilicity resulted in substantially raised activity. Although much remains to be discovered about these anionophores, their high activities and intrinsic tuneabilities bode well for applications. In future work, we plan to develop and exploit these molecules as tools for biophysical research and to explore the possibility of useful biological activity.
Collapse
Affiliation(s)
- Hennie Valkenier
- School of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, United Kingdom
| | - Anthony P. Davis
- School of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, United Kingdom
| |
Collapse
|
80
|
Chun Y, Singh NJ, Hwang IC, Lee JW, Yu SU, Kim KS. Calix[n]imidazolium as a new class of positively charged homo-calix compounds. Nat Commun 2013; 4:1797. [PMID: 23653209 PMCID: PMC3644089 DOI: 10.1038/ncomms2758] [Citation(s) in RCA: 87] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2012] [Accepted: 03/18/2013] [Indexed: 11/12/2022] Open
Abstract
Macrocycles based on neutral calixarenes and calixpyrroles have been extensively explored for ion binding, molecular assembly and related applications. Given that only these two types of calix compounds and their analogs are available, the introduction of new forms of widely usable calix macrocycles is an outstanding challenge. Here we report the quadruply/quintuply charged imidazole-based homo-calix compounds, calix[4/5]imidazolium. The noncovalent (C-H)+/π+-anion interactions of the imidazolium rings with anions inside and outside the cone are the stabilizing factors for crystal packing, resulting in self-assembled arrays of cone-shaped calix-imidazolium molecules. Calix[4]imidazolium senses fluoride selectively even in aqueous solutions. Calix[5]imidazolium recognizes neutral fullerenes through π+–π interactions and makes them soluble in water, which could be useful in fullerene chemistry. Not only derivatization and ring expansion of calix[n]imidazolium, but also their utilization in ionic liquids, carbene chemistry and nanographite/graphene exfoliation could be exploited. Only two types of neutral homo-calix compounds, including analogues, have been reported. Chun et al. now describe a new class of positively charged calix[n]imidazolium, which is synthesized in one pot and is able to recognize anions and fullerenes in aqueous media.
Collapse
Affiliation(s)
- Young Chun
- Center for Superfunctional Materials, Department of Chemistry, Pohang University of Science and Technology, Pohang 790 784, Korea
| | | | | | | | | | | |
Collapse
|
81
|
Ukhatskaya EV, Kurkov SV, Matthews SE, Loftsson T. Encapsulation of Drug Molecules into Calix[n]arene Nanobaskets. Role of Aminocalix[n]arenes in Biopharmaceutical Field. J Pharm Sci 2013; 102:3485-512. [DOI: 10.1002/jps.23681] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2013] [Revised: 06/28/2013] [Accepted: 07/01/2013] [Indexed: 11/05/2022]
|
82
|
Liang LL, Zhao Y, Zhang YQ, Tao Z, Xue SF, Zhu QJ, Liu JX. Coordination nanotubes self-assembled from cucurbit[7]uril and lanthanide cations. CrystEngComm 2013. [DOI: 10.1039/c3ce40147b] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
83
|
|
84
|
Williams ER, Leithall RM, Raja R, Weller MT. Complex anion inclusion compounds: flexible anion-exchange materials. Chem Commun (Camb) 2013; 49:249-51. [DOI: 10.1039/c2cc36484k] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
85
|
Veverková L, Záruba K, Král V. Study of receptor mediated selective anion transmembrane transport using parallel artificial membrane permeability assay. Analyst 2013; 138:2804-7. [DOI: 10.1039/c3an36760f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
86
|
Ogirala P, Negin S, Agena C, Schäfer C, Geisler T, Mattay J, Gokel GW. Properties of long alkyl-chained resorcin[4]arenes in bilayers and on the Langmuir trough. NEW J CHEM 2013. [DOI: 10.1039/c2nj40337d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
|
87
|
Lakouraj MM, Tashakkorian H. Synthesis and Investigation of Transition Metal Removing of Novel Thermally Stable Polyamides bearing Calix[4]arene in their Backbones. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2012. [DOI: 10.1080/10601325.2012.714318] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
88
|
Shen B, Li X, Wang F, Yao X, Yang D. A synthetic chloride channel restores chloride conductance in human cystic fibrosis epithelial cells. PLoS One 2012; 7:e34694. [PMID: 22514656 PMCID: PMC3326041 DOI: 10.1371/journal.pone.0034694] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2011] [Accepted: 03/05/2012] [Indexed: 11/25/2022] Open
Abstract
Mutations in the gene-encoding cystic fibrosis transmembrane conductance regulator (CFTR) cause defective transepithelial transport of chloride (Cl−) ions and fluid, thereby becoming responsible for the onset of cystic fibrosis (CF). One strategy to reduce the pathophysiology associated with CF is to increase Cl− transport through alternative pathways. In this paper, we demonstrate that a small synthetic molecule which forms Cl− channels to mediate Cl− transport across lipid bilayer membranes is capable of restoring Cl− permeability in human CF epithelial cells; as a result, it has the potential to become a lead compound for the treatment of human diseases associated with Cl− channel dysfunction.
Collapse
Affiliation(s)
- Bing Shen
- Department of Physiology, The Chinese University of Hong Kong, Shatin, Hong Kong, China
- Department of Physiology, Anhui Medical University, Hefei, China
| | - Xiang Li
- Morningside Laboratory for Chemical Biology, Department of Chemistry, The University of Hong Kong, Hong Kong, China
| | - Fei Wang
- Department of Physiology, Anhui Medical University, Hefei, China
| | - Xiaoqiang Yao
- Department of Physiology, The Chinese University of Hong Kong, Shatin, Hong Kong, China
- * E-mail: (XY) (XY); (DY) (DY)
| | - Dan Yang
- Morningside Laboratory for Chemical Biology, Department of Chemistry, The University of Hong Kong, Hong Kong, China
- * E-mail: (XY) (XY); (DY) (DY)
| |
Collapse
|
89
|
Quesada R. Membrane Transport. Supramol Chem 2012. [DOI: 10.1002/9780470661345.smc173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
90
|
Elie CR, Charbonneau M, Schmitzer AR. An anion structure–activity relationship of imidazolium-based synthetic transporters. MEDCHEMCOMM 2012. [DOI: 10.1039/c2md20107k] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
91
|
Chui JKW, Fyles TM. Ionic conductance of synthetic channels: analysis, lessons, and recommendations. Chem Soc Rev 2012; 41:148-75. [DOI: 10.1039/c1cs15099e] [Citation(s) in RCA: 141] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
92
|
Choi YR, Chae MK, Kim D, Lah MS, Jeong KS. Synthetic chloride transporters with the binding mode observed in a ClC chloride channel. Chem Commun (Camb) 2012; 48:10346-8. [DOI: 10.1039/c2cc35743g] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
93
|
Kumar M, Kumar R, Bhalla V, Sharma PR, Kaur T, Qurishi Y. Thiacalix[4]arene based fluorescent probe for sensing and imaging of Fe3+ ions. Dalton Trans 2012; 41:408-12. [DOI: 10.1039/c1dt11169h] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
94
|
Park KM, Lee E, Park CS, Lee SS. Tube-Type Coordination Polymers: Two- and Four-Silver(I)-Mediated Linear Networking of Calix[4]arene Tetracarboxylates. Inorg Chem 2011; 50:12085-90. [DOI: 10.1021/ic201622p] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ki-Min Park
- Department of Chemistry and Research Institute of Natural Science, Gyeongsang National University, Jinju 660-701, South Korea
| | - Eunji Lee
- Department of Chemistry and Research Institute of Natural Science, Gyeongsang National University, Jinju 660-701, South Korea
| | - Chul Soon Park
- Department of Chemistry and Research Institute of Natural Science, Gyeongsang National University, Jinju 660-701, South Korea
| | - Shim Sung Lee
- Department of Chemistry and Research Institute of Natural Science, Gyeongsang National University, Jinju 660-701, South Korea
| |
Collapse
|
95
|
Busschaert N, Wenzel M, Light ME, Iglesias-Hernández P, Pérez-Tomás R, Gale PA. Structure-activity relationships in tripodal transmembrane anion transporters: the effect of fluorination. J Am Chem Soc 2011; 133:14136-48. [PMID: 21846096 PMCID: PMC3436094 DOI: 10.1021/ja205884y] [Citation(s) in RCA: 251] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2011] [Indexed: 12/24/2022]
Abstract
A series of easy-to-make fluorinated tripodal anion transporters containing urea and thiourea groups have been prepared and their anion transport properties studied. Vesicle anion transport assays using ion-selective electrodes show that this class of compound is capable of transporting chloride through a lipid bilayer via a variety of mechanisms, including chloride/H(+) cotransport and chloride/nitrate, chloride/bicarbonate, and to a lesser extent an unusual chloride/sulfate antiport process. Calculations indicate that increasing the degree of fluorination of the tripodal transmembrane transporters increases the lipophilicity of the transporter and this is shown to be the major contributing factor in the superior transport activity of the fluorinated compounds, with a maximum transport rate achieved for clog P = 8. The most active transporter 5 contained a urea functionality appended with a 3,5-bis(trifluoromethyl)phenyl group and was able to mediate transmembrane chloride transport at receptor to lipid ratios as low as 1:250000. Proton NMR titration and single crystal X-ray diffraction revealed the ability of the tripodal receptors to bind different anions with varying affinities in a 1:1 or 2:1 stoichiometry in solution and in the solid state. We also provide evidence that the most potent anion transporters are able to induce apoptosis in human cancer cells by using a selection of in vitro viability and fluorescence assays.
Collapse
Affiliation(s)
| | - Marco Wenzel
- Chemistry, University of Southampton, Southampton, SO17 1BJ, U.K
| | - Mark E. Light
- Chemistry, University of Southampton, Southampton, SO17 1BJ, U.K
| | - Paulina Iglesias-Hernández
- Department of Pathology and Experimental Therapeutics, Cancer Cell Biology Research Group, University of Barcelona, Barcelona, Spain
| | - Ricardo Pérez-Tomás
- Department of Pathology and Experimental Therapeutics, Cancer Cell Biology Research Group, University of Barcelona, Barcelona, Spain
| | - Philip A. Gale
- Chemistry, University of Southampton, Southampton, SO17 1BJ, U.K
| |
Collapse
|
96
|
Le Duc Y, Michau M, Gilles A, Gence V, Legrand YM, van der Lee A, Tingry S, Barboiu M. Imidazole-Quartet Water and Proton Dipolar Channels. Angew Chem Int Ed Engl 2011. [DOI: 10.1002/ange.201103312] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
|
97
|
Le Duc Y, Michau M, Gilles A, Gence V, Legrand YM, van der Lee A, Tingry S, Barboiu M. Imidazole-Quartet Water and Proton Dipolar Channels. Angew Chem Int Ed Engl 2011; 50:11366-72. [DOI: 10.1002/anie.201103312] [Citation(s) in RCA: 127] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2011] [Indexed: 01/11/2023]
|
98
|
Hussain S, Brotherhood PR, Judd LW, Davis AP. Diaxial Diureido Decalins as Compact, Efficient, and Tunable Anion Transporters. J Am Chem Soc 2011; 133:1614-7. [DOI: 10.1021/ja1076102] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sabir Hussain
- School of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, United Kingdom
| | - Peter R. Brotherhood
- School of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, United Kingdom
| | - Luke W. Judd
- School of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, United Kingdom
| | - Anthony P. Davis
- School of Chemistry, University of Bristol, Cantock’s Close, Bristol BS8 1TS, United Kingdom
| |
Collapse
|
99
|
Haynes CJE, Gale PA. Transmembrane anion transport by synthetic systems. Chem Commun (Camb) 2011; 47:8203-9. [DOI: 10.1039/c1cc12061a] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
100
|
Elidrisi I, Negin S, Bhatt PV, Govender T, Kruger HG, Gokel GW, Maguire GEM. Pore formation in phospholipid bilayers by amphiphilic cavitands. Org Biomol Chem 2011; 9:4498-506. [DOI: 10.1039/c0ob01236j] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|